Articles in press have been peer-reviewed and accepted, which are not yet assigned to volumes /issues, but are citable by Digital Object Identifier (DOI).
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Regio- and Chemoselective Fluorination of 1,3-Dicarbonyl Compounds
[Abstract](6909) [PDF 0KB](55)
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Highly regioselective α-fluorination of 1,3-dicarbonyl compounds could proceed smoothly by virtue of 1-chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) as the fluorine source in the mixed solvent of ethanol and water. By adjusting the amount of the fluorine source and reaction time, the desired 2-fluoro- and 2,2-difluoro-1,3-dicarbonyl compounds could also be efficiently constructed with an excellent chemoselectivity. The reaction readily took place via a single electron transfer process at room temperature without any transition-metal catalyst, alkaline additive or additional oxidant and could be applicated in gram-scale synthesis, which features a convenient and practical free-radical fluorination.
Display Method:
Study on State Feedback Impulsive Control of Red Squirrel Protection with the Influence of Herpes Virus
ZHANG Meng, ZHAO Yi, AN Di, SHI Mingjing
2021, 34(2): 173-176.   doi: 10.3969/j.issn.1003-0972.2021.02.001
[Abstract](0) [PDF 2209KB](0)
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A kind of state feedback nonlinear impulse model was established to describe the inter-specific competition between red squirrel and grey squirrel and the artificial protection of red squirrel.The effects of releasing artificial red squirrel individuals and eliminating grey individuals on the persistence of red squirrel population were studied. The existence and stability of the order-1 periodic solution of the impulsive control model was proved by using the method of successor function and Dulac function. The numerical simulation is given to verify the theoretical results.
Research on a Kind of Fishery Model with Constant Harvesting and State Feedback Control
HUANG Lizhuang, LIU Qiong
2021, 34(2): 177-181.   doi: 10.3969/j.issn.1003-0972.2021.02.002
[Abstract](0) [PDF 1310KB](0)
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A kind of fishery model with constant harvesting and state feedback control is considered. Firstly, the existence and stability of the system without impulsive effects are discussed. Secondly, for the case in which the system has two equilibria, the conditions for the existence of order-1 period solution and order-1 homoclinic orbit are obtained by the geometry theory and the successor function method. Finally, the conditions for the orbital stability of order-1 periodic solution are given by the analogue of Poincaré criterion.
Influence of Inertia Effect on Adiabatic Shear Instability
LIU Jiejian, WU Bo, YAN Xiaojing, WANG Genwei
2021, 34(2): 182-185.   doi: 10.3969/j.issn.1003-0972.2021.02.003
[Abstract](0) [PDF 1319KB](0)
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Based on the similarity between adiabatic shear instability and fluid boundary layer, the governing equations of adiabatic shear instability are established by the generalized boundary layer theory. The governing equations are dimensionless by the method of dimensional analysis, and the generalized Reynolds number which can represent the inertial effect is obtained. At the same time, the dimensionless governing equations are solved by the method of linear perturbation. The influence of inertia effect on adiabatic shear instability is analyzed. The results showed that the adiabatic shear instability would be restrained when the inertia effect reaches a certain critical value, and the restraining effect would increase with the increase of inertia effect.
Detection and Analysis of the Quality Characters of Yunnan Soft Rice in South Henan Province
PENG Bo, ZHAO Yuhe, DONG Chao, HUANG Yueru, FENG Jiahua, TANG Cuifeng, PENG Juan, TIAN Xiayu, SUN Yanfang, HUANG Yaqin, WANG Quanxiu, ZHOU Wei, A Xinxiang
2021, 34(2): 186-194.   doi: 10.3969/j.issn.1003-0972.2021.02.004
[Abstract](0) [PDF 2272KB](0)
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Taking the 38 Yunnan soft rice germplasm resources introduced from South Henan as experimental materials, the appearance quality, grinding quality, nutrition quality, cooking and eating quality of soft rice in South Henan were tested and analyzed by huller, rice polisher and near-infrared grain analyzer, combined with biochemical and physical-chemical analysis techniques. The results showed that there were rich variation types in chalkiness rate, chalkiness area, chalkiness degree, grain length, grain width, length width ratio, brown rice rate, milled rice rate, whole milled rice rate, protein content, total amino acid content, total essential amino acid content, amylose content, taste value and gelatinization temperature. In particular, the total amino acid content, the total essential amino acid content, chalkiness character, grain type and gelatinization temperature in soft rice varied widely.
Effects of NaCl Stress on Seed Germination and Leaf Physiological Characteristics of Veronica persica Poir.
HUANG Ping, LI Qingwei, SUN Longfei, CHEN Yun
2021, 34(2): 195-200.   doi: 10.3969/j.issn.1003-0972.2021.02.005
[Abstract](0) [PDF 1593KB](0)
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The effects of NaCl stress on germination and physiological characteristics of Veronica persica Poir. were investigated, and the physiological characteristics were compared with Trifolium repens.The results showed that:25~50 mmol/L, while 75~100 mmol/L NaCl stress had no obvious effect on germination rate, but affected seedling cotyledon expansion. With the increase of NaCl concentration, the activity of superoxide dismutase (SOD) increased first and then decreased, while the activity of white clover continued to decrease.The proline content of Veronica persica Poir. rised steadily, but that of Trifolium repens decreased firstly and then rising. The MDA content of both plants increased slowly, but the MDA content of Veronica persica Poir. was always lower than that of Trifolium repens. Inconclusion:the seed germination of Veronica persica Poir. could better tolerate low concentration of NaCl stress, while Veronica persica Poir. could better regulate its physiological and biochemical reactions to adapt to NaCl stress than Trifolium repens.
Screening and Identification of the Endophytic Bacteria Bacillus velezensis Against Tea Anthracnose
DAI Yafeng, WU Nannan, GAO Zhen, WANG Gaozhan, GONG Andong, ZHANG Yimei
2021, 34(2): 201-207.   doi: 10.3969/j.issn.1003-0972.2021.02.006
[Abstract](0) [PDF 1868KB](0)
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Seven strains of endophytic bacteria were isolated and purified from the healthy leaves of ‘Xinyang 10’ Camellia sinensis in parent field of Xiangyun tea base. Four target strains of endophytic bacteria with inhibitory effect on Colletotrichum fructicola were screened by the flat-stand method. The endophytic antagonistic bacterium named X10-03 significantly inhibited the vegetative growth of C. fructicola with an inhibition of 52.7%. Optical microscope showed that both mycelial growth and conidia germination of C. fructicola were inhibited by the metabolites of strain X10-03. The strain X10-03 fermentation broth in 3-fold diluted concentrations suppressed the mycelial growth of C. fructicola with a suppressive rate of 70.4%. The X10-03 strain was identified as Bacillus velezensis by morphological observation, 16S rDNA and gyrA gene sequences analysis.
Discovery and Identification of Autotoxic Substances and Transformed Strain of Rehmannia Glutinosa Continuous Cropping Obstacle
WANG Mingdao, CHU Mengxiao, CAO Hongli, HAO Shanghua, QIU Shuang, ZHANG Yuhang
2021, 34(2): 208-215.   doi: 10.3969/j.issn.1003-0972.2021.02.007
[Abstract](0) [PDF 2567KB](0)
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The blank soil and the first stubble soil were systematically analyzed and positioned by thin layer chromatography (TLC), and prepared by the microbial to transformation of Rehmannia glutinosa. It was identified as the autotoxic substance of Rehmannia glutinosa. The results showed that the substance is present in extracted by dichloromethane of the first stubble soil was ergosterol-4, 6, 8 (14), 22-tetraene- 3-one, the transformed strain was Aspergillus puniceus, named Aspergillus puniceus FF5YH.
Classification, Ordination and Species Diversity of Herbal Community in Shihe River Riparian
WU Hao, ZHANG Meng, JI Qiubo, RAO Benqiang
2021, 34(2): 216-224.   doi: 10.3969/j.issn.1003-0972.2021.02.008
[Abstract](0) [PDF 2280KB](0)
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Thirty plots of herbaceous community were set up in the Shihe river riparian wetland of Xinyang city. The TWINSPAN classification and DCA ordination methods were used to divide community types, while the CCA and RDA ordination methods were used to explore the effects of environmental factors on plant distributions and species diversity. The results showed that 30 plots could be divided into three community types, those were Beckmannia syzigachne + Rumex acetosa + Polygonum orientale, Digitaria sanguinalis + Bidens pilosa + P. hydropiper and Chenopodium album + R. acetosa, while B. syzigachne + R. acetosa + P. orientale was the dominant type. TWINSPAN and DCA clearly reflected the variations of moisture gradient within community habitats. CCA indicated that soil available nitrogen and available potassium were the primary environmental factors that determined plant species distribution, most species trended to distribute in the low and medium levels of soil nutrients. RDA indicated that Patrick richness index had significantly positive relationships with soil pH value, Shannon-wiener and Simpson diversity index all had significantly positive relationships with soil available potassium, while Pielou evenness index had highly negative relationships with soil available nitrogen.
Estimation of Maize Chlorophyll Content Based on Spectral Index
CHEN Shengbo, CHEN Yanbing, REN Fengdi, ZHENG Yu
2021, 34(2): 225-229.   doi: 10.3969/j.issn.1003-0972.2021.02.009
[Abstract](0) [PDF 1685KB](0)
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Chlorophyll is an important parameter to evaluate plant growth status.In order to establish the model for estimating the chlorophyll content of maize at different growth stages, the influence of soil and atmosphere and the applicability of satellite remote sensing images were considered.Taking summer maize as the research object, the estimation model of chlorophyll content in elongation stage, filling stage, milk stage and maturity stage was established.The coefficient of determination(R2) and root mean square error (RMSE) were used as evaluation and test indexes.The model was validated based on Planet Labs remote sensing satellite (PL) data and field trip data.It showed that:the Green atmospherically resistant vegetation index(GARI) established the best model for estimating the chlorophyll content of maize at elongation stage and milk stage.In the filling stage,the model based on Green Normalized Differential Vegetation Index(GNDVI) has the best result.The optimal model of the maturity stage was based on the Normalized Differential Vegetation Index (NDVI). Value of R2 of these models in the four growth stages were 0.76, 0.85, 0.84 and 0.88, respectively, and the models accuracy was 80%, 90%, 90% and 90%, respectively.Therefore, this model can be used to estimate rapidly and efficiently the chlorophyll content of maize in field scaleand provide theoretical basis for crop growth, quality evaluation and yield estimation.
Spatiotemporal Dynamics Analysis of Carbon Emissions From Nighttime Light Data in Beijing-Tianjin-Hebei Counties
LI Feng, LIU Jun, LIU Wenlong, LIAO Shunbao
2021, 34(2): 230-236.   doi: 10.3969/j.issn.1003-0972.2021.02.010
[Abstract](0) [PDF 2046KB](0)
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In order to more accurately analyze the spatiotemporal distribution of carbon emissions in Beijing-Tianjin-Hebei counties, DMSP-OLS and NPP-VIIRS nighttime light (NTL) data were corrected by LST and EVI Regulated NTL City Index (LERNCI) and light threshold, respectively, and pixel-level carbon emission models with 1 km resolution were constructed from 2000 to 2016 by combining carbon emission statistics from 30 provinces in China. The spatiotemporal patterns of carbon emissions and influencing factors in Beijing-Tianjin-Hebei region were analyzed. The results show that:(1) the average relative error of carbon emission simulation in the regression model of unary quadratic polynomial carbon emission is 0.37%, which can be used for carbon emission analysis. (2) Carbon emissions in Beijing-Tianjin-Hebei region shows a trend of first rising and then falling. Due to the implementation of energy conservation and emission reduction measures, carbon emissions appears an inflection point in 2013. The key areas of carbon emissions are located in the “Beijing-Tianjin-Tang” region. (3) Population size and proportion of secondary industry are positively correlated with carbon emission, but their influence is weakening. Per capita GDP is negatively correlated with carbon emissions; Urbanization rate, fixed asset investment and social labor productivity have positive impetus to carbon emission.
Carbon Sequestration Potential and Environmental Impacts of Utilizing Crop Residues for Biochar Implementation in China
YANG Qiushuang, NAN Hongyan, ZHAO Ling
2021, 34(2): 237-241,247.   doi: 10.3969/j.issn.1003-0972.2021.02.011
[Abstract](0) [PDF 1527KB](0)
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The carbon sequestration potential and environmental impacts of crop residue biochar implementation in China are quantified by using life cycle assessment combined with Gabi software. The results show that the annual GWP100 (global warming potential at 100-year scale) value of the biochar system can reach -921.66 kg CO2e, which can significantly improve the carbon sequestration in China; The realization of negative carbon emission mainly depends on the bio-oil and pyrolysis gas generated to offset the coal-fired generation, and the carbon storage realized by biochar in the soil. Among all the parameters, the biochar yield has the greatest influence on the carbon sequestration potential of the whole system; the biochar system can also alleviate human toxicity potential, acidification potential and other environmental problems; the environmental feasibility of biochar implementation is confirmed.
Spatio Temporal Variation of Cultivated Land Change During 1995-2015 in China
XIE Wenquan, ZHANG Xingguo, PAN Xiaofang
2021, 34(2): 242-247.   doi: 10.3969/j.issn.1003-0972.2021.02.012
[Abstract](0) [PDF 2051KB](0)
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Based on the land use change pattern map and SDE method, the spatiotemporal evolution characteristics of cultivated land was studied in China during 2000-2015. The results showed that:(1) the cultivated land area increased first and then decreased around 2000 year, but the gravity center was moving northwest during the study period and the spatial distribution space continued to expand.(2) the area and spatial location of cultivated land changed dramatically from the year 1995 to 2005 and the new cultivated land mainly came from woodland and grassland;the reduction of cultivated land was mainly transformed into woodland, grassland and construction land; the activity of cultivated land decreased and the new cultivated land mainly came from grassland and unused land while the reduction of cultivated land was mainly occupied by construction land during the year of 2005-2015.(3) During the year 1995-2005, the increased and decreased cultivated land were in the pattern of “northeast to southwest” and the spatial distribution of increased cultivated land was relatively dispersed while the spatial distribution of decreased cultivated land was relatively concentrated. The gravity center of the increased cultivated land was moving north-west during 1995-2005. During the year 2005-2015, the increased cultivated land was in the pattern of “due east-due west” while the decreased cultivated land in the pattern of “northeast-southwest”.When it came to the spatial distribution, the increased cultivated land mainly located in the north China, while the reduced cultivated land mainly located in the southeast China.
Spatial-Temporal Variations of Extreme Temperature Events in Xinjiang from 1961 to 2016
ZHAO Guoyong, HAN Yan, LIU Weizhen, ZHANG Ronglei, MENG Jianing, ZENG Xueyuan
2021, 34(2): 248-254.   doi: 10.3969/j.issn.1003-0972.2021.02.013
[Abstract](0) [PDF 2162KB](0)
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Based on the daily maximum, minimum and mean temperature data of 51 stations in Xinjiang Uygur Autonomous Region from 1961 to 2016, the spatial and temporal characteristics of 16 extreme temperature indices in Xinjiang are studied. The methods include linear trend estimation, rescaled range analysis, spatial analysis and Pearson correlation analysis. The results are as follows:(1) there is a good correlation between extreme temperature and annual average temperature in Xinjiang. This indicates that the extreme temperature changes in the region can be used as an indicator of climate change; (2) the extreme temperature indices have a significant increasing trend from both spatial and temporal point;(3) among sixteen indices, the increasing trend of these indices (TN90p, TN10p, FD0 and GSL) is larger than that of the others during the last 56 years. The warming trend in these areas (Shisanjianfang, Turpan, Barkol and Hami) is the largest from spatial point. (3) the warming magnitude of the cold (nights) indices is larger than that of the warm (days) indices, which indicates that the cold (nights) indices are more sensitive to global warming; (4) the long-term persistence of the changes in the extreme temperature indices indicates that the warming trend will continue in the future; (5) the extreme temperature indices in Xinjiang are related more closely to longitude and elevation than to latitude.
Relationship of Paleo-environment and Human Activity Recorded by the Strata of Wangwan Site in Luoyang
LI Zhongxuan, ZHAO Yuqiong, JIAO Shixing
2021, 34(2): 255-259.   doi: 10.3969/j.issn.1003-0972.2021.02.014
[Abstract](0) [PDF 1438KB](0)
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Using the environmental proxies of grain-size, frequency susceptibility and content of heavy metal element, the relationship of human activities and paleo-environment of the Wangwan site in Luoyang is discussed. The results show that the samples of the Longshan culture layer are mainly deposited with silty loess, and the lower value of frequency susceptibility (mean 11.9%) and the lower value of Rb/Sr (0.64) indicate that the region was dominated by strong winter wind in the early Longshan period (phase III of Wangwan site), and the wind dust accumulation was of prevalence. Clay is the main components of layer in the Erlitou culture period. The climate was warm-wet by indicators of the higher frequency susceptibility (mean 12.3%) and higher values of Rb/Sr(0.81) reflecting a strong summer monsoon. Correspondingly, the high intensity of human activities represented by the fire regime in the Erlitou period contrasted to the Longshan period. And, the tools were also improved from the Longshan to the Erlitou period.
Optimization of Green Infrastructure in Xinyang CityBased on Network Structure Analysis
ZHAI Huimin, ZHANG Ziying, ZHAO Xiaoli, XIE Wenquan, CHENG Qixian, HU Yonghui
2021, 34(2): 260-266.   doi: 10.3969/j.issn.1003-0972.2021.02.015
[Abstract](0) [PDF 1986KB](0)
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Based on the case of Xinyang city, the green infrastructure system is extracted according to the “central control point-connecting channel-site”, and then the ecological corridor is extracted by the landscape resistance analysis and the optimization path is simulated. Finally, the optimum scheme and control measures are put forward through the analysis of network structure to verify. The results show that the optimized α index is increases from 0.11 to 0.37, β index is increases from 1.08 to 1.79, γ index is increases from 0.38 to 0.58; the optimized green infrastructure network has higher complexity and connectivity than before, and it has certain habitat network function, which can basically meet the needs of residents.
Essential Problems of the Integrative Development of Information Metrology Discipline Group
LIU Yang
2021, 34(2): 267-271.   doi: 10.3969/j.issn.1003-0972.2021.02.016
[Abstract](0) [PDF 1353KB](0)
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The information metrology discipline group contains several related disciplines, which are increasingly showing a trend of integration. It is necessary to critically think about the basic problems faced by integration and to clarify its research ideas.Through the analysis and sorting of the current status and problems of the integration of the information metrology discipline group,the basic problems of the infrastructure and structure construction faced by the integration of the information metrology discipline group are put forward.In the meanwhile, using the knowledge system of the tree structure of analogy method,the genetic investigation method of the discipline system is also proposed.Based on the “discipline-object-researcher” relationship and “information basic cycle process” of the information metrology discipline group, the overall courses foundation construction can be carried out, and the establishment of “content-structure-form” and “uniformity” Integrated information metrology discipline system will be under further discussion.
Construction and K Ion Storage Property of B-doping Porous Carbon
LIU Huiqiao, HE Yanan, JIA Jing, GAO Zihui, JIANG Yong, CAO Kangzhe
2021, 34(2): 272-276.   doi: 10.3969/j.issn.1003-0972.2021.02.017
[Abstract](0) [PDF 1660KB](0)
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Carbon materials are considered as the promising potassium ion battery anode materials owing to their abundant sources and easy preparation. Herein, boron-doped porous carbon (B-pC) was constructed by using glucose, sodium tetraborate, and sodium chloride as the carbon precursor, the boron source, and the hard template, respectively. The obtained B-pC is assembled with ultrathin porous carbon nanosheets, further constructing a three-dimensional network structure with a large specific surface area (577.8 m2/g) and pore volume (0.66 cm3/g). When used as an anode material for potassium ion battery, the B-pC anode shows long-cycle stability as well as excellent rate performance. The reversible capacity maintains 246 mAh/g after 100 cycles at a current density of 0.1 A/g, showing a capacity retention ratio of 90.5% when compared with the 2nd discharge capacity. Furthermore, the reversible capacity recovers 98.4% when the current density turns back to 0.1 A/g, which exhibiting a promising application on potassium ion batteries.
Study on the Synthesis of Hierarchical MFI Zeolite for Efficient Adsorption of Crystal Violet
JI Yajun, LI Tiantian, GAO Peilin, DENG Ruhan, YIN Qunwei
2021, 34(2): 277-282.   doi: 10.3969/j.issn.1003-0972.2021.02.018
[Abstract](0) [PDF 1878KB](0)
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Aiming at the defect of micropore in ZSM-5 zeolite which restricts the adsorption of bulky molecule, a micro/meso nanosheet-type MFI zeolite (MFI) was synthesized by the hydrothermal method for the adsorption of crystal violet (CV) dye in aqueous solution. Both MFI and ZSM-5 have the same MFI crystal structure. Compared to ZSM-5, MFI had larger specific surface area, more pore volume, and larger average pore size, which is beneficial to the adsorption of bulky molecule dyes. Then, the effects of solution pH, contact time, concentration of dye and temperature on the adsorption performance of MFI zeolite were investigated and compared with ZSM-5 zeolite. The results showed that the optimal pH value for the adsorption of crystal violet by ZSM-5 and MFI was 7. The adsorption process reached equilibrium within 10 min, which conformed to the pseudo-second-order kinetic model and Langmuir isothermal model. The maximum adsorption capacity of MFI zeolite was 195.97 mg/g, which was 3.58 times higher than that of ZSM-5 zeolite. The superior adsorption performance of MFI zeolite was mainly attributed to the excellent micro/meso properties.
Optimized Design of Salisbury Screen Doped with Nanometer Rare Earth Oxide
XUE Zeli, ZHANG Lanxu, WEN Ying, ZHANG Haifeng
2021, 34(2): 283-286.   doi: 10.3969/j.issn.1003-0972.2021.02.019
[Abstract](0) [PDF 2385KB](0)
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Using the equivalent transmission line theory of radar wave propagation in the medium, the reflection coefficient and the related calculation formula of the radar wave are analyzed at the vertical incidence to Salisbury screen. Based on the MATLAB software, the panorama analysis method is used to discuss and design the electric constant, permeability and reflectivity of Salisbury screen at the isolation layer doped with nano rare earth oxides. The results showed that the optimization of magnetic loss plays an important role in the optimized design of radar absorbing materials.The isolation layer doped with nanometer rare earth oxide improves the performance of Salisbury screen for the radar wave absorption in the frequency band 2~18 GHz. The backward reflectance attenuation value is greater than 7 dB, which can meet the basic requirements of radar wave stealth in national defense and military.
Introduction and Cultivation of Camellia Oleifera Varieties in the Northern Fringe Area
BU Fujun, ZHANG Jianshe, ZHANG Yuhu, ZHOU Chuantao, FANG Chengliang, WANG Heng, ZHANG Dingyan
2021, 34(2): 287-291.   doi: 10.3969/j.issn.1003-0972.2021.02.020
[Abstract](0) [PDF 1303KB](0)
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Taking 7 Camellia oleifera varieties introduced from Research Institute of Subtropical Forestry, Chinese Academy of Forestry Sciences as research objects, and taking the local best Camellia oleifera variety Guangshan 1 as control, the introduction and cultivation experiment was carried out.The adaptability is analyzed through 15 indexes, including such as the morphologicalshape index, fruit characteristics, the main economic characters and so on. The results showed that the introduced Camellia oleifera varieties grew well and showed strong adaptability in Xinyang.In terms of growth and fruit oil content, Ya-3, Ya-18 and Ya-84 were superior to other varieties, and Ya-3, Ya-19 and Ya-84 were the best in fruit yieldthe best. In terms of seed yield, the fresh seed yield and dry seed yield of Ya-3, Ya-18 and Ya-19 were the highest, and the varieties with the best seed oil content were Sub-3, Sub-17 and Sub-84. The oil yield of Sub-18, Sub-19 and Sub-84 is the highest, and the same variety does not have all the excellent characteristics.In a word, the comprehensive characters and quality of sub-3, sub-19 and sub-84 are the best, which is suitable for popularization and cultivation in the vast hills and low mountains of Xinyang.
Detection and Localization of Floating Objects via Improved Faster R-CNN
LI Guojin, YAO Dongyi, AI Jiaoyan, YI Zeren, LEI Liyi
2021, 34(2): 292-299.   doi: 10.3969/j.issn.1003-0972.2021.02.021
[Abstract](0) [PDF 2347KB](0)
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A detection and localization algorithm was proposed to overcome the issue that unmanned ships has low accuracy in detecting and locating floating objects. The proposed algorithm utilized Faster R-CNN (Faster Regions with Convolutional Neural Network) as the building block to conduct the initial detection and localization, output the temporal result with location boxes. Then the Class Activation network(CA) was used to remove the location boxes and mark the object location with pixels. The case study has verified that the algorithm has satisfactory accuracy in detection and localization of floating objects. Besides, the algorithm remains potential for other objects that shared similar features with lake floating objects.
Hyperspectral Image Classification Based on Multi-scale Local Binary Pattern and Composite Kernel Function
HUANG Wei, HUANG Yao, NIU Jiqiang, WANG Hua
2021, 34(2): 300-307.   doi: 10.3969/j.issn.1003-0972.2021.02.022
[Abstract](0) [PDF 3069KB](0)
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In order to better make full use of the texture information of hyperspectral image, a hyperspectral image classification method is proposed based on Multiscale Local Binary Pattern and Composite Kernel function (MLBPCK). Firstly,two optimal scales of the LBP are used to extract the texture features of the hyperspectral image, then the above spatial texture features are introduced into Gaussian kernel function for obtaining two spatial kernels. Moreover, the two spatial kernels and the spectral kernel obtained by introducing spectral information into Gaussian kernel function are combined to form a composite kernel. Finally, the composite kernel is input into a support vector machine (SVM) for classification to obtain classification results. Experimental results show that the classification accuracy on Indian Pines and Pavia University are 0.994 8 and 0.991 8, respectively, which is significantly better than other similar hyperspectral image classification methods.
Density Peak Anomaly Detection Method Based on Rknn
LIU Xuan, MA Wenpeng, YANG Yuqing
2021, 34(2): 308-315.   doi: 10.3969/j.issn.1003-0972.2021.02.023
[Abstract](0) [PDF 2942KB](0)
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In order to improve the detection accuracy of anomaly detection algorithms and reduce the dependence on data prior information when dealing with local anomalies, anomaly clusters and complex distribution data sets, a density peak anomaly detection method Rknn-DP based on inverse K nearest neighbors is proposed. First of all, the algorithm improved the calculation of local density and relative distance in the density peak algorithm by Rknn, to make it more accurately describe the characteristics of the abnormal points. After that, select points with low local density and high relative distance by adaptive threshold, as rough set of abnormal points. Finally, the Rknn method is used to prune the rough selection set, eliminate the noise point, reduce the associated error effect, and adaptively get the final abnormal set. Compared with ABOD, LSCP, HBOS, IForest algorithms in real data sets and artificial data sets, the results show that the Rknn-DP, algorithm performs with higher detection and adaptability.
Optimization of Tunnel Leakage Treatment Scheme Based on Cloud Model TOPSIS
WU Xianguo, WANG Lei, WANG Junhong, CHEN Hongyu
2021, 34(2): 316-323.   doi: 10.3969/j.issn.1003-0972.2021.02.024
[Abstract](0) [PDF 1475KB](0)
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Groundwater encroachment leads to the frequent occurrence of tunnel seepage disease. It is an important issue to select effective treatment scheme for tunnel seepage treatment. Considering the uncertainty of evaluation factors of tunnel seepage control, the cloud model and TOPSIS evaluation method are combined to eliminate the influence of subjective factors on seepage control evaluation. Based on a large number of engineering practices and existing research results, the evaluation index system of seepage management in operating tunnels is constructed, including four first-level evaluation indexes of technical adaptability, environmental adaptability, economic adaptability and social adaptability, corresponding to 16 secondary evaluation indicators of leakage water treatments program. According to the monitoring data of leakage water in the sensitive section of Wangjiawan in Wuhan City, the five alternative water leakage treatment schemes of surface plugging method, waterproof plate waterproof method, spray plugging method, grouting treatment method and waterproof gasket method are proposed. The cloud model TOPSIS is used for evaluation and selection, and the grouting treatment method is determined as the optimal solution, which is applied to the evaluation of the leakage treatment scheme for operating subway tunnels.
Research of Advance Support Construction Technology for Water-rich Weak Surrounding Rock Bias Tunnel
HAO Ting, ZHANG Zhijian, LI Jiao, LIANG Bin
2021, 34(2): 324-330.   doi: 10.3969/j.issn.1003-0972.2021.02.025
[Abstract](0) [PDF 2213KB](0)
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Advance support construction technology for water-rich weak surrounding rock bias tunnel is studied. Taking the national One Belt and One Road key project, Majiazhai Tunnel on the Linxiang-Qingshuihe Expressway in Lincang of Yunnan province as the engineering background, a finite element model of tunnel excavation was established with or without advance support by finite element software MIDAS GTS NX. In addition, the variation of surrounding rock stability, primary support stress and plastic zone of surrounding rock under the condition of advanced support without long-term support and long pipe shed were analyzed. The results show that, with the excavation of tunnel, the settlement of vault becomes larger and larger. The maximum arch settlement after the completion of tunnel excavation without pre-supporting conditions is 9.56 mm. The arch settlement of the long pipe shed was reduced by 44.9% under the condition of advanced support. For the deformation of surrounding rock, the maximum vertical deformation of surrounding rock decreased by 48.0% under the condition of advanced support of long pipe shed, the maximum Y direction deformation is reduced by 50.4%. In the absence of advanced support conditions, the maximum compressive stress of the primary support exceeds the allowable value of 13.5 MPa. The maximum primary support compressive stress of the long pipe shed under the advanced support condition is 11.47 MPa. Long tube shed advanced support can effectively control the surrounding rock deformation of the biased section of the water-rich weak surrounding rock tunnel, improve structural stress state, and ensure the safty of tunnel construction.
Quasi-static Response Analysis of Fractional Viscoelastic Compressible Oil and Gas Well Pipe Rod
ZHANG Hao, LEI Yuchen, GAO Yunfei, ZHANG Weiwei, YAN Qifang, LIU Linchao
2021, 34(2): 331-338,344.   doi: 10.3969/j.issn.1003-0972.2021.02.026
[Abstract](0) [PDF 6287KB](0)
Abstract:
The horizontal oil and gas well pipe rod is simplified as a viscoelastic cylindrical pipe model with elastic constraints. The fractional derivative viscoelastic theory is used to describe the constitutive relationship of the pipe rod. Combined with the theory of elastic mechanics, the equilibrium equations of compressible viscoelastic pipe rod are established, and the analytical solutions of viscoelastic stress and displacement of compressible pipe rod are obtained. The numerical results show that the larger the order of the fractional derivative, the larger the initial stress at the inner wall of the corresponding pipe rod, the larger the radial and circumferential stress at the inner wall of the cylindrical pipe, the larger the rising section of the corresponding vertical stress, and the larger the stable value of the vertical stress of the pipe rod. When the the Poisson's ratio of the outer casing increases, the radial displacement and stress will be smaller. The influence of Poisson's ratio on the circumferential stress is not obvious, but the influence on radial stress is more significant. The elastic modulus of casing has little effect on the radial displacement. The larger the model constant ratio, the larger the radial and circumferential stresses. The thickness of the outer casing has little influence on the circumferential stress at the inner wall of the column pipe. When the thickness of the outer casing increases, the radial stress will also increase, and the vertical stress value will decrease.
Research Progress Regulation of Non-coding RNAs in Muscle Growth and Development
ZHANG Pengpeng, WANG Yaling, HAN Qiu, CHENG Xiaofang, LI Cencen, XU Haixia, XU Yongjie
2021, 34(2): 339-344.   doi: 10.3969/j.issn.1003-0972.2021.02.027
[Abstract](0) [PDF 1287KB](0)
Abstract:
Noncoding RNA (ncRNA),which plays an important role in the process of muscle growth and development, involves in skeletal muscle stem cells proliferation,differentiation and muscle fibers hypertrophy. In this article,30 literatures were used to review the latest research progress of three types of non-coding RNAs (long non-coding RNAs, miRNAs and circular RNAs) in skeletal muscle growth and development, in order to provide new ideas to the treatment of muscle diseases and the improvement of farm animal growthperformance.
Dynamic Analysis of Filippov Model for a Kind of Nutrition-Phytoplankton Based on Ecological Water Diversion
GUO Hongjian, ZHU Congcong
2019, 32(4): 517-524   doi: 10.3969/j.issn.1003-0972.2019.04.001
[Abstract](2052) [FullText HTML](797) [PDF 1051KB](105)
Superconvergence Analysis of a Two-grid Method with Nonconforming Element for Allen-Cahn Equation
SHI Dongyang, WEI Yifan
2020, 33(2): 173-180   doi: 10.3969/j.issn.1003-0972.2020.02.001
[Abstract](3247) [PDF 557KB](84)
The Solution of Heterogeneous Data in Web Service Composition
GUO Song, ZHU Ye
2012, 25(2): 258-261  
[Abstract](1006) [FullText HTML](172) [PDF 250KB](64)
1997, 10(1): 29-32  
[Abstract](355) [PDF 183KB](60)
Modification and Application of Activated Carbon from Fruit shell of Chinese Tallow Tree
1997, 10(1): 78-82  
[Abstract](695) [PDF 261KB](59)
Critical Eigenvalue for the Steady-State Transport Equation with Maxwell Boundary Condition
Zhang Xianwen, Huang Tianxue
1998, 11(2): 109-115  
[Abstract](508) [PDF 370KB](59)
1997, 10(1): 56-59  
[Abstract](410) [PDF 124KB](59)
1997, 10(1): 52-55  
[Abstract](402) [PDF 132KB](58)
The Mond-Weir Type Duality for Multiobjective A-N Generalized Convex Programming
Huang Tianxue,
1997, 10(1): 37-38  
[Abstract](519) [PDF 123KB](58)
1992, 5(1): 84-93  
[Abstract](419) [PDF 1119KB](58)
1992, 5(1): 77-79  
[Abstract](547) [PDF 268KB](57)
Analysis of Information Dimension on the Spatial Structure of Urban Systems
1997, 10(1): 64-69  
[Abstract](564) [PDF 250KB](57)
1997, 10(1): 74-77  
[Abstract](432) [PDF 190KB](56)
Regio- and Chemoselective Fluorination of 1,3-Dicarbonyl Compounds
[Abstract](6909) [PDF 0KB](55)
1997, 10(1): 49-52  
[Abstract](398) [PDF 180KB](55)
Discussion on an Age-infection-structured HIV Model with Antiretroviral Therapy
LIU Helong, YANG Jiaorong
2019, 32(2): 173-178   doi: 10.3969/j.issn.1003-0972.2019.02.001
[Abstract](1290) [FullText HTML](198) [PDF 365KB](51)
Studies on a Delayed SIR Epidemic Model with Saturated Rate
WANG Xia, GUO Hong-tao
2011, 24(4): 421-424  
[Abstract](984) [FullText HTML](176) [PDF 947KB](46)
Studies on the Optimization Selection of Injection Timings and Injection Doses Based on the Integrated Control Effect of Glucose
LIU Shouzong, YU Ling, HUANG Mingzhan, SHI Xiangyun
2020, 33(3): 345-350   doi: 10.3969/j.issn.1003-0972.2020.03.001
[Abstract](552) [PDF 1394KB](42)
Synthesis and Gelation Properties of Amphiphilic Naphthalene-Diimide
PEI Qiang, DING Aixiang, XU Guo
2019, 32(2): 270-275   doi: 10.3969/j.issn.1003-0972.2019.02.017
[Abstract](1604) [FullText HTML](176) [PDF 1560KB](41)
Preparation and Photocatalytic Activity Study of Nano-TiO2 with Different Exposed Percentage of {001} Facets
LIU Xiaogang, CHEN Miaomiao, WU Zhenwei, HOU Yangyang, QIN Mengyu
2019, 32(2): 298-301   doi: 10.3969/j.issn.1003-0972.2019.02.022
[Abstract](1749) [FullText HTML](224) [PDF 1340KB](40)
Analysis of a Slow-Fast System for Glucose-Insulin Regulatory with β Cell Function
SHI Xiangyun, GAO Xiwen
2020, 33(4): 517-521   doi: 10.3969/j.issn.1003-0972.2020.04.001
[Abstract](209) [PDF 517KB](39)
Study on the Geo-environmental Fundaments for Catering Culture of Xinyang
YU Guo-zhong, CHEN Fei-yan, XU Fang, CHEN Wei-dong
2011, 24(2): 224-227  
[Abstract](1063) [FullText HTML](178) [PDF 111KB](38)
Screening of Active Ingredients from Traditional Chinese Medicine Against the Novel Coronavirus Based on Molecular Docking
SONG Xinqiang, ZHANG Yu, DAI Erqin, YU Yajun, WANG Lei, DU Hongtao
2020, 33(2): 210-219   doi: 10.3969/j.issn.1003-0972.2020.02.007
[Abstract](3052) [PDF 1571KB](36)
Numerical Simulation of the Filling Process of Polymer in a Complex Cavity
LIU Qingsheng, LIU Youqiong
2020, 33(2): 181-185,332   doi: 10.3969/j.issn.1003-0972.2020.02.002
[Abstract](2987) [PDF 866KB](35)
Study on the Relationship between Digestive Tract Ultrastructure and Feeding Habits of Six Grasshoppers
WANG Xiaoqi, LIANG Shuqing, LU Ying
2020, 33(4): 553-559   doi: 10.3969/j.issn.1003-0972.2020.04.008
[Abstract](1598) [FullText HTML](559) [PDF 4263KB](34)
An Algorithm for Minimal Cover Set Problem in Wireless Sensor Networks Based on Genetic Algorithm
WANG Shu-li, ZHU Ye, ZHANG Peng
2012, 25(3): 395-397  
[Abstract](944) [FullText HTML](179) [PDF 1988KB](33)
Existence,Uniqueness and Ultimate Boundedness of Positive Solution to a Stochastic Barbour Single-host Model
QI Longxing, LIU Binbin, TANG Yanwu
2019, 32(4): 525-530   doi: 10.3969/j.issn.1003-0972.2019.04.002
[Abstract](1740) [FullText HTML](576) [PDF 379KB](33)
Superconvergence Analysis of MECHL Finite Element for Maxwell's Equation on Anisotropic Meshes
SHI Dongyang, LI Chaoqun
2020, 33(1): 1-8   doi: 10.3969/j.issn.1003-0972.2020.01.001
[Abstract](2312) [PDF 1415KB](32)
Studies on a Kind of Mathematical Model for Chemical Reactions of Grain Brewing
WANG Tieying
2021, 34(1): 1-4   doi: 10.3969/j.issn.1003-0972.2021.01.001
[Abstract](120) [PDF 463KB](32)
Detection and Analysis of the Main Metabolites in Aromatic Rice Varieties from Henan
PENG Bo, KONG Dongyan, WANG Landi, PENG Yu, HAN Fuxing, XIN Qingqing, GONG Andong, SUN Yanfang, PANG Ruihua, SONG Xiaohua, LI Jintao, ZHOU Qiying, SONG Shizhi
2019, 32(2): 207-213   doi: 10.3969/j.issn.1003-0972.2019.02.007
[Abstract](1105) [FullText HTML](175) [PDF 673KB](31)
Analysis of an Epidemic Model with Vaccination and Quarantine
LI Lian-bing, GUO Shu-li
2012, 25(1): 14-19  
[Abstract](928) [FullText HTML](151) [PDF 279KB](30)
Global Stability of a Kind of SIRS Model with Standard Incidence Rate and Nonconstant Total Population
ZHOU Huijuan, LAN Man
2020, 33(3): 351-353,364   doi: 10.3969/j.issn.1003-0972.2020.03.002
[Abstract](469) [PDF 1207KB](29)
Non-oscillatory Entropy Stable Scheme for Shallow Water Equations
LIU Youqiong, LIU Qingsheng, RONG Xianju, HUANG Fenglin
2019, 32(3): 345-351   doi: 10.3969/j.issn.1003-0972.2019.03.001
[Abstract](1089) [FullText HTML](258) [PDF 1708KB](29)
A Two-strain Epidemic Model with Super-infection and Logistic Growth
ZHANG Juping, LI Kelu, YANG Junyuan
2020, 33(1): 15-20   doi: 10.3969/j.issn.1003-0972.2020.01.003
[Abstract](2277) [PDF 1328KB](29)
Structure of Avian Community and Species Diversity in Xinyang City during Winter
YU Tong-lei, FU Jian-rong
2011, 24(4): 499-501  
[Abstract](951) [FullText HTML](168) [PDF 1868KB](27)
Global Stability for a Kind of Viral Dynamical Model
Zheng Lili , Wang Juan
2015, 28(1): 18-20   doi: 10.3969/j.issn.1003-0972.2015.01.005
[Abstract](750) [FullText HTML](141) [PDF 178KB](27)
Determination of VitC Content in Fruits and Vegetables by HPLC
Zhao Xinmei, Yuan Lingwei, Chen Shifeng, Zhang Sufeng
2013, 26(1): 49-53  
[Abstract](1106) [FullText HTML](187) [PDF 543KB](27)
Purification of Water of Wastewater Pond by Wolffia arrhiza
ZHANG Ya-ting, YANG Gui-fang, LI Fei-fei
2011, 24(4): 473-475  
[Abstract](977) [FullText HTML](161) [PDF 1822KB](26)
Z3-connectivity of Graphs with Independence Number 2
ZHANG Xiaoxia, YU Kun
2019, 32(4): 531-533   doi: 10.3969/j.issn.1003-0972.2019.04.003
[Abstract](1667) [FullText HTML](583) [PDF 294KB](26)
Research Progress on Generation Mechanism and Detection Methods of Reactive Oxygen Species During Photocatalytic Reaction Based on TiO2
LIU Xiaogang, LI Meng, DU Guiru, DONG Yuhan, LU Kaixin, LIU Xinglong, CHEN Gaoyan, DU Lanxin
2021, 34(1): 166-172   doi: 10.3969/j.issn.1003-0972.2021.01.027
[Abstract](89) [PDF 658KB](25)
Development and Application of Specific Molecular Markers for the hau CMS in Chinese Cabbage
HENG Shuangping, HUANG Hao, YANG Xi, CHEN Guo, ZHOU Yiwen, WANG Yinle, LI Xianwen
2019, 32(4): 539-543   doi: 10.3969/j.issn.1003-0972.2019.04.005
[Abstract](1647) [FullText HTML](585) [PDF 732KB](25)
A Giving up Smoking Model with General Nonlinear Incidence Rate
WANG Xia, LI Baolin, GE Qing
2019, 32(3): 362-366   doi: 10.3969/j.issn.1003-0972.2019.03.004
[Abstract](910) [FullText HTML](132) [PDF 333KB](25)
Climatic Changes During the Past 2000 Years Based on Lake Biomarkers from the Central and Western Tibetan Plateau
LI Xiumei, FAN Baowei
2019, 32(2): 239-244   doi: 10.3969/j.issn.1003-0972.2019.02.012
[Abstract](1482) [FullText HTML](227) [PDF 1011KB](25)
A Disease Transmission Model with Infective Stages and Vaccination
Li Lianbing , Zhang Ping
2013, 26(3): 313-315   doi: 10.3969/j.issn.10030972.2013.03.001
[Abstract](165) [FullText HTML](8) [PDF 404KB](25)
1985, 0(1): 74-80   doi: 10.3969/j.issn.1003-0972.(1985)01-0074-07
[Abstract](748) [PDF 458KB](25)
Existence of Solutions for a Class of Quasilinear Schrödinger Equations
ZHANG Ping, HAN Jianxin
2019, 32(3): 352-356   doi: 10.3969/j.issn.1003-0972.2019.03.002
[Abstract](953) [FullText HTML](127) [PDF 331KB](24)
ynamical Analysis of a Nutrient-Toxin-Producing Phytoplankton System under State Impulsive Feedback Control
LI Shuai, ZHU Congcong, GUO Hongjian, SONG Xinyu
2019, 32(2): 179-184   doi: 10.3969/j.issn.1003-0972.2019.02.002
[Abstract](1030) [FullText HTML](85) [PDF 1609KB](23)
Induced Module of Modular Lie Superalgebra P(2)
HU Yuwang, ZHANG Kaili
2019, 32(1): 1-4   doi: 10.3969/j.issn.1003-0972.2019.01.001
[Abstract](861) [FullText HTML](58) [PDF 317KB](23)
Evolution and Function DivergenceAnalysis of the bHLH Transcription Factor Family in Soybean(Glycine max L.)
CHENG Lin, XUE Yajie, FU Juemin, LIU Xuyang, QU Xiaochong, DAI Xinglong, DONG Peifeng, XU Yuexia, HONG Yifeng, YAO Yuan, ZHAO Jihai
2019, 32(1): 27-38   doi: 10.3969/j.issn.1003-0972.2019.01.006
[Abstract](853) [FullText HTML](51) [PDF 3908KB](22)
Regularity and Green’s Relations for a Semigroup of Transformations Preserving an Equivalence Relati
DENG Wei-na, PEI Hui-sheng
2012, 25(3): 281-284  
[Abstract](942) [FullText HTML](153) [PDF 772KB](21)
The Faber-Krahn Inequalities of ν-Euclidean Type for the p-Laplacian on Riemannian Manifolds
ZHANG Liuwei, WU Huijuan
2019, 32(2): 185-190   doi: 10.3969/j.issn.1003-0972.2019.02.003
[Abstract](918) [FullText HTML](75) [PDF 346KB](21)
1988, 1(3): 306-311   doi: 10.3969/j.issn.1003-0972.(1988)03-0306-06
[Abstract](1117) [PDF 444KB](21)
完备度量空间中一类平方型压缩映象的公共不动点定理
YU Jing, GU Feng
2011, 24(4): 436-439  
[Abstract](748) [FullText HTML](32) [PDF 995KB](20)
A strengthened Hilberts inequality and its application
YANG Bi cheng
2001, 14(1): 40-43  
[Abstract](594) [PDF 267KB](20)
The Synthesis,Structure and Properties of a Copper (Ⅱ) Coordination Polymer
ZHENG Lingyun, LI Sa, JIANG Yong, ZHOU Qiuju, XU Dongli
2019, 32(2): 266-269   doi: 10.3969/j.issn.1003-0972.2019.02.016
[Abstract](1596) [FullText HTML](179) [PDF 760KB](19)
Allelopathic Effect of Invasive Plant Bidens frondosa on Two Crops
LU Dongsheng, WU Hao, CHEN Junfan, SHI Lishun
2019, 32(4): 544-548   doi: 10.3969/j.issn.1003-0972.2019.04.006
[Abstract](1628) [FullText HTML](558) [PDF 394KB](19)
Research on Ecological Compensation Standard and Level for Key Ecological Functional Areas of the Huaihe River Source
GAO Hui, ZHANG Xiangyao, LIU Minghua, GAO Junbo, WEI Wei
2020, 33(2): 244-249   doi: 10.3969/j.issn.1003-0972.2020.02.011
[Abstract](2866) [PDF 1010KB](19)
All the Solvable Extensions of a Class of Nilpotent Lie Algebras
LI Xiao-chao, HU Yu-wang
2011, 24(4): 444-446  
[Abstract](587) [FullText HTML](31) [PDF 924KB](19)
Stability and Hopf Bifurcation of a HIV-1 Infection Model with Time Delay and CTL Immune Response
MA Huilian, GUO Zunguang
2019, 32(1): 5-10   doi: 10.3969/j.issn.1003-0972.2019.01.002
[Abstract](886) [FullText HTML](66) [PDF 975KB](19)
The Dynamic Evaluation of Ecological Security during the Process of Rapid Urbanization in Henan Prov
GAO Jun-bo, LIU Ming-hua, LI Qing-fei
2011, 24(3): 367-370  
[Abstract](716) [FullText HTML](33) [PDF 217KB](19)
Reactive Force Field Model Molecular Dynamics Study on the Thermal Stability of Single Atom Alloy Catalysts
WANG Guichang, YANG Wenqi, WANG Jie, QIAO Yuanyuan
2020, 33(2): 191-197   doi: 10.3969/j.issn.1003-0972.2020.02.004
[Abstract](2948) [PDF 2330KB](19)
An Improved Land Price Evaluation Method Based on Artificial Neural Network and Fuzzy Mathematics
WANG Hua, LI Wenwen, NIU Jiqiang, LIU Dianfeng
2020, 33(1): 76-82   doi: 10.3969/j.issn.1003-0972.2020.01.013
[Abstract](2172) [PDF 1548KB](19)
Stability of the stochastic system
JIA Yuan qiang 1, FU Li hong 2
2000, 13(1): 18-20  
[Abstract](916) [PDF 160KB](18)
The Stochastic HIV Model with Two Kinds of Infections
HAN Jianxin, ZHANG Ping, JIN Xin
2020, 33(4): 522-526   doi: 10.3969/j.issn.1003-0972.2020.04.002
[Abstract](105) [PDF 561KB](18)
Granular Computing for Super-Resolution Reconstruction of Aerial Images in Campus
LIU Hongbing, MA Yuan, DIAO Xiaoyu, GUO Huaping
2019, 32(2): 312-319   doi: 10.3969/j.issn.1003-0972.2019.02.025
[Abstract](819) [FullText HTML](35) [PDF 2339KB](18)
Immunocontraception Control Models with Sex-structure
ZHANG Mei-ming, ZHANG Feng-qin, LV Jiang, ZHANG Xue-xuan
2011, 24(4): 425-429  
[Abstract](788) [FullText HTML](27) [PDF 885KB](18)
Glutathione Stabilized Copper Nanoclusters Based Fluorescent Method for the Sensitive Detection of Hg2+ Ion
WANG Haibo, BAI Hongyu, MAO Anli, DONG Gaoli
2019, 32(4): 600-603   doi: 10.3969/j.issn.1003-0972.2019.04.015
[Abstract](1581) [FullText HTML](483) [PDF 1201KB](18)
A Sequence Kernel Support Vector Machine Based on the Critical Bandwidth Wavelet Packet Feature for
LI Jian, LI Jie
2012, 25(3): 398-401  
[Abstract](691) [FullText HTML](19) [PDF 2031KB](18)
Syntheses, Structures and Properties of Pyrazole-3-carboxylic Acid Complexes
ZHANG Xiuqing, CHEN Fang, HE Xiong, ZHANG Dan, YANG Hongli, LI Yan
2020, 33(2): 198-204   doi: 10.3969/j.issn.1003-0972.2020.02.005
[Abstract](2830) [PDF 1143KB](18)
Detection and Analysis of Amino Acid Contents of Special Rice Seeds in Xinyang
PENG Bo, HUANG Xinhua, HE Lulu, LIU Ziyue, PENG Juan, SUN Yanfang, PANG Ruihua, SONG Xiaohua, LI Jintao, WANG Quanxiu, ZHENG Mengyang, SONG Shizhi
2020, 33(1): 46-53   doi: 10.3969/j.issn.1003-0972.2020.01.009
[Abstract](2148) [PDF 1769KB](18)
Studies on the Model Concerning Controlling Plant Root Pests
WANG Tieying, ZUO Ping, CAI Jin
2018, 31(4): 517-519   doi: 10.3969/j.issn.1003-0972.2018.04.001
[Abstract](767) [FullText HTML](70) [PDF 414KB](18)
Research of Abscisic Acid Modulated Auxin Biosynthesis and Transport in Rice Root
LI Jintao, FAN Haiyan, ZHAO Qiqi, LU Danyang, YANG Yuna, YI Qingping, LIU Mingyan, JIA Yufang, PENG Bo, JIAN Qingmei
2019, 32(1): 39-46   doi: 10.3969/j.issn.1003-0972.2019.01.007
[Abstract](814) [FullText HTML](50) [PDF 1909KB](18)
Global Dynamics of a kind of HBV Infection Model with Nonlinear Incidence Rate
WANG Xia, CHEN Jian-qi
2012, 25(2): 141-145  
[Abstract](653) [FullText HTML](29) [PDF 231KB](17)
Analysis of the Asymptotic Properties of a Stochastic Glucose-insulin Regulation System
SHI Xiangyun, YAO Jiaoyan, HUANG Mingzhan
2019, 32(3): 357-361   doi: 10.3969/j.issn.1003-0972.2019.03.003
[Abstract](807) [FullText HTML](113) [PDF 460KB](17)
Diversity and Fauna Analysis of Butterflies in Baotianman Nature Reserve
ZHAI Qing, CAO Long, CAO Zhenmin, WANG Xiang, ZHAO Zhuo, FENG Leining, DU Kaicong, LI Yao
2020, 33(1): 60-68   doi: 10.3969/j.issn.1003-0972.2020.01.011
[Abstract](2050) [PDF 1717KB](17)
Analysis on Cited Paper of Journal of Xinyang Normal University:Natural Science Edition
ZHANG Jian-he, REN Chang-jiang
2011, 24(3): 355-359  
[Abstract](654) [FullText HTML](27) [PDF 221KB](17)
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2019, 32(2): 345-345  
[Abstract](793) [FullText HTML](23) [PDF 193KB](17)
Research of Ethylene Modulated Auxin Biosynthesis and Transport in Rice Root
LI Jintao, YANG Yuna, CHAI Mengmeng, HU Qiyan, YANG Wenqian, YUAN Jingjia, LI Yangyi, DONG Yu, LIU Binwen, FAN Haiyan
2020, 33(3): 377-384   doi: 10.3969/j.issn.1003-0972.2020.03.007
[Abstract](450) [PDF 2262KB](17)
Response of Shallow Ground Temperature in the North-South Transition Zone under Global Warming: A Case Study of Xinyang City
YAN Junhui, LIU Jinke, LU Shan, WANG Liming, LIANG Liuling, LIU Minghua, CAO Guangchao
2019, 32(3): 397-402   doi: 10.3969/j.issn.1003-0972.2019.03.010
[Abstract](1231) [FullText HTML](194) [PDF 815KB](17)
2019, 32(3): 517-517  
[Abstract](774) [FullText HTML](114) [PDF 334KB](17)
Study on a Tumor-Immune Model with Exponential Growth of Tumor
WANG Xiaoqin, WANG Jingjing, LI Jianquan
2020, 33(1): 9-14   doi: 10.3969/j.issn.1003-0972.2020.01.002
[Abstract](2164) [PDF 1373KB](17)
Research on the Concept and Application of Mountain Ecological Adaptation Planning in University Campus
WANG Yufeng, GAO Hongbo
2020, 33(1): 167-172   doi: 10.3969/j.issn.1003-0972.2020.01.029
[Abstract](2045) [PDF 2760KB](17)
Quantitative Classification and Functional Groups of Alien Plant Alternanthera Philoxeroides Invaded Community in Xinyang City
WU Hao, CAI Dongzhang, GAO Jingwen, REN Yuxuan, RAO Benqiang
2020, 33(2): 250-257   doi: 10.3969/j.issn.1003-0972.2020.02.012
[Abstract](2840) [PDF 1436KB](17)
Effects of Different Environmental Factors on the Extracellular Polysaccharide Exudation of [WTHX]Scytonema javanicum
Rao Benqiang , Zhang Jiying , Lou Yamin , Mei Haixia , Wang Yanlu
2015, 28(4): 496-500   doi: 10.3969/j.issn.1003-0972.2015.04.009
[Abstract](516) [FullText HTML](32) [PDF 1753KB](16)
Nowhere-zero 3-flows in Cayley Graphs on Generalized Dicyclic Group
LI Liangchen, ZHANG Xiaoxia, ZHANG Huiqin
2018, 31(3): 345-347   doi: 10.3969/j.issn.1003-0972.2018.03.001
[Abstract](654) [FullText HTML](72) [PDF 257KB](16)
Multi-objective Optimization Model and Algorithm for Weapon-Target Assignment Problem in Joint Fire Strike
XUAN Hejun, XIANG Yong, HE Xiaoqiang, LIU Daohua
2019, 32(4): 664-669   doi: 10.3969/j.issn.1003-0972.2019.04.027
[Abstract](1547) [FullText HTML](482) [PDF 762KB](16)
Variation Characteristics of Classic Isolines in Huaihe River Basin during 1951-2014
HAN Yan, ZHAO Guoyong, LIU Minghua, ZHAI Hainan, ZHANG Yuejin, GUAN Panpan
2019, 32(2): 234-238   doi: 10.3969/j.issn.1003-0972.2019.02.011
[Abstract](1278) [FullText HTML](104) [PDF 642KB](16)
Research on POI Analysis and Visualization of Zhengzhou City under Road Network Space
HE Xiaohui, FAN Danyang, WEI Haitao, GUO Hengliang, TIAN Zhihui
2019, 32(2): 228-233   doi: 10.3969/j.issn.1003-0972.2019.02.010
[Abstract](1435) [FullText HTML](112) [PDF 701KB](16)
Cartan Invariant Matrix for Chevalley Group of Type  Awith Characteristic 13
Hu Yuwang , Jiang Wei , Du Fenghua
2014, 27(4): 469-472   doi: 10.3969/j.issn.1003-0972.2014.04.001
[Abstract](449) [FullText HTML](40) [PDF 211KB](16)
Variation Characteristics and Its Related Factors of Sunshine Hours in Xinyang City in Recent 66 Years
FAN Baowei, LI Xiaoxiao, LIU Minghua, LYU Lei, QIU Yanzi, YAN Junhui
2020, 33(1): 97-101   doi: 10.3969/j.issn.1003-0972.2020.01.016
[Abstract](2113) [PDF 1632KB](16)
Global Analysis of an SEIVR Epidemic Model with Acute and Chronic Stages
Fang Bin , Fu Wei, Li Xuezhi
2013, 26(2): 161-164   doi: 10.3969/j.issn.1003-0972.2013.02.002
[Abstract](250) [FullText HTML](14) [PDF 412KB](16)
Spatial Distribution Patterns of the River Basins and the Urban Agglomerations in China
Wang Yimin, Li Wentian, Yin Hang
2013, 26(2): 250-253  
[Abstract](726) [PDF 1099KB](16)
Study on Characteristics of Temperature Variation in Wuhan City for the Past 110 Years Based on Information Entropy
CHI Zhifeng, YAN Junhui, LIU Jinke, WU Lili
2019, 32(4): 579-583   doi: 10.3969/j.issn.1003-0972.2019.04.011
[Abstract](1659) [FullText HTML](567) [PDF 1033KB](16)
Genome-wide Identification of NAC Genes in Tea Plant and Its Expression Regulation in Stress Response
ZHOU Qiying, HAN Yuehua, LIANG Ping, WANG Yanli, MU Yixue, WANG Yijia, ZHU Yue, LIU Guofeng, PENG Bo, YUAN Hongyu
2020, 33(4): 567-578   doi: 10.3969/j.issn.1003-0972.2020.04.010
[Abstract](100) [PDF 2545KB](16)
The Geological Background Research Progress of Perlite Deposits
YAN Yutong , JIA Baojian , ZHOU Hongsheng , SHI Xingjun , ZHAO Guoyong , YAN Junhui
2016, 29(4): 645-649   doi: 10.3969/j.issn.1003-0972.2016.04.036
[Abstract](522) [FullText HTML](35) [PDF 406KB](16)
Evolutionary Analysis and Subcellular Location of OsRRK1 Protein in Rice
MA Yinhua, LI Pingfang, HE Yuhang, ZHANG Xin, DU Bo, YANG Fang, JIN Chenzhong
2020, 33(3): 371-376   doi: 10.3969/j.issn.1003-0972.2020.03.006
[Abstract](426) [PDF 1864KB](16)
On the Debate and Fusion among the Disciplines of Human-environment Relationship Research
WANG Yi-min, GAO Jun-bo
2011, 24(4): 462-466  
[Abstract](608) [FullText HTML](33) [PDF 1345KB](16)
Demarcation of Eco-redline in Zhongshan City and Changes in Its Value of Ecosystem Services
SUN Lihui, SHU Chang, LIU Hao
2020, 33(2): 226-234   doi: 10.3969/j.issn.1003-0972.2020.02.009
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2D Acoustic Analysis Based on Exact Geometric Boundary Element Method
ZHANG Wei, WANG Shige, LU Chuang
2019, 32(4): 534-538   doi: 10.3969/j.issn.1003-0972.2019.04.004
[Abstract](1692) [FullText HTML](548) [PDF 987KB](16)
Growth Characteristics of Pseudogastromyzon (Labigastromyzon)Changtingensis Tungpeiensis Chen et Liang
LI Hongjing, LI Xiaofeng, CHEN Menhui
2019, 32(4): 549-556   doi: 10.3969/j.issn.1003-0972.2019.04.007
[Abstract](1512) [FullText HTML](492) [PDF 1054KB](16)
Journal introduction

Started:in 1981,Quarterly

Administrative Department: Xinyang Normal University

Sponsor:Xinyang Normal University

Editor & Publisher:the Editorial Department of Journal of Xinyang Normal University

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Supported by: Beijing Renhe Information Technology Co. Ltd