Journal of Jishou University(Natural Sciences Edition)

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Direct Determination Condition for Subdivision Iteration of Nonsingular H-Matrix

DONG Jie, TUO Qing, XIE Zhihui

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 1-9. DOI: 10.13438/j.cnki.jdzk.2023.01.001

Abstract （282）

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By subdividing the non-dominated row index set of matrices and constructing a new progressive scaling iterative factor,we obtain the method of finding a suitable positive diagonal transformation factor,and a new condition for direct determination of a class of nonsingular H-matrices.

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Wiener Number of a Class of Interchange Graph

JIN Jingjing

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 10-13. DOI: 10.13438/j.cnki.jdzk.2023.01.002

Abstract （220）

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We studied a class of interchange graph G(R^*，S^*),where R^*=(r₁,r₂),and S^*=(1,…,1).In this paper,we give a formula for the Wiener number of G(R^*，S^*) and the asymptotic property for the Wiener number of G(R^*，S^*).

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Effect of Se and Te Substitution Doping on Electronic Transport Properties of WS₂-MoS₂ Nanodevices

LIN Li'e, LIAO Wenhu

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 14-23. DOI: 10.13438/j.cnki.jdzk.2023.01.003

Abstract （244）

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Based on the first-principles calculation method of combining the density functional theory and the Non-equilibrium Green's function,the effect of Se and Te atom substitution doping on the electronic transport properties of WS₂-MoS₂ nanodevice is studied.The results show that the WS₂-MoS₂ nanodevice has interesting negative differential resistance effect in the bias range of [+0.7 V,+1.0 V] and [-1 V,-0.9 V],with the current gradually decreasing with the increase of bias voltage,and the electronic transport properties of the device show indirect gap semiconductor characteristics.The device can be converted into p-type semiconductor when replaing the S-atoms in WS₂-MoS₂ composite nanodevice with Se-atoms.When the S-atoms in WS₂-MoS₂ composite nanodevice is partially doped with substitutional Te-atoms,the device is converted into p-type semiconductor or even metal,and its conductivity is greatly improved.The partial substitution doping of WS₂-MoS₂ nanodevice with Se and Te atoms exhibits a negative differential resistance effect,and the passing of currents across the devices is significantly improved.

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Improved YOLOv4 Lung Nodule Detection Algorithm

LIN Kunhuang, LI Jianfeng, WANG Yang, LIU Zhijie, LIU Zheyu

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 24-29. DOI: 10.13438/j.cnki.jdzk.2023.01.004

Abstract （466）

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An improved YOLOv4 lung nodule detection algorithm is designed to solve the problems of small target missing detection and lung nodule position distortion in the target detection YOLOv4 algorithm.On the basis of the original YOLOv4 network,the up sampling process of the feature fusion network is replaced by the bilinear interpolation method,and the tensor stacking method is used to make the semantic information of the top layer and the location information of the bottom layer to form a higher channel feature tensor.The experimental results show that,compared with the original YOLOv4 algorithm,the average accuracy and prediction speed of the improved YOLOv4 algorithm on the public dataset LUAN16 are improved by 4.54% and 28.1% respectively,and the visualization results have more accurate position expression.

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Reflection Model of Lambert Surface in Three Light Sources

XU Xuemei, YANG Fenlin

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 30-33. DOI: 10.13438/j.cnki.jdzk.2023.01.005

Abstract （613）

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In order to idealize the reflection model of object surface,the scene radiance of the Lambertian object illuminated by the strip light source,the uniform light source and the hemispherical uniform light source is derived by the radiance and the spherical triangle formula,and then the Lambertian surface reflection model in three kinds of light sources is obtained.

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Preparation of MnO₂/CNTs Composites and the Electrochemical Performances as Cathode Materials for ARZIBs

YANG Ping, LIU Sijia, WAN Chaoyi, LIU Jiale, CAO Jing, JIANG Jianbo

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 34-43. DOI: 10.13438/j.cnki.jdzk.2023.01.006

Abstract （306）

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Manganese acetate and ammonium persulfate used as raw materials,MnO₂ was prepared by hydrothermal synthesis method,and then MnO₂/CNTs composites was prepared by ultrasonic method.The products were characterized by X-ray diffraction,fourier transform infrared spectroscopy and scanning electron microscopy,and their electrochemical performances as cathode for AZIBs were measured by cyclic voltammetry,electrochemical impedance spectrum and galvanostatic charge-dicharge.The results showed that the product was β-MnO₂ nanowires at the reaction temperature of 140 ℃ and reaction time of 22 h.The chemical structure of β-MnO₂ did not change when it was compounded with CNTs.When circulated 20 times at 0.1C magnification,the first specific discharge capacity of β-MnO₂/CNTs electrode in 1 mol/L ZnSO₄+0.5 mol/L MnSO₄ aqueous solution is 140 mAh/g.Compared with the first discharge specific capacity of β-MnO₂/CNTs electrode in 1 mol/L ZnSO₄ solution (45 mAh/g),the first discharge specific capacity has been increased by 2 times;and compared with the first discharge specific capacity of β-MnO₂ electrode in 1 mol/L ZnSO₄+ 0.5 mol/L MnSO₄ aqueous solution (27 mAh/g),it has been increased by 4 times,which indicates that the composite of β-MnO₂ and CNTs can improve the electrochemical performance of β-MnO₂ Moreover,the electrochemical performance of β-MnO₂/CNTs electrode is better in 1 mol/L ZnSO₄+0.5 mol/L MnSO4 aqueous solution,but the capacity retention rate is only 50%,which indicates that the performances of the battery needs to be further improved.

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Effect of Pier Height on Mechanical Properties of Asymmetric High Pier Continuous Rigid Frame Bridges

LI Jiawen, NING Ruo'an, WANG Jianxing

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 44-52.

Abstract （181）

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The mechanical characteristics of asymmetric high pier continuous rigid frame bridges with different pier heights were studied to obtain the internal force and displacement deformation characteristics of the main girders and piers of high pier continuous rigid frame bridges with different pier heights.The vertical displacement of the main girder increases with the increase of pier height,with an average increase of 14.3% at the maximum displacement,and the shear force of the main girder at the top of the pier decreases with the increase of pier height,with an average change of rate of 37.1%.

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Bearing Capacity of Carbon Fiber Plate Reinforced Bridge

WANG Jianxing, CHEN Yiming, ZHANG Pengyu, LU Fan, WEI Guifeng, WEI Dongping, SONG Dexin

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 53-58. DOI: 10.13438/j.cnki.jdzk.2023.01.008

Abstract （329）

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In order to explore the influence of carbon fiber plate on the bearing capacity of the bridge,the model of Dongtiaoxi Bridge was established by Midas Civil software,and the sinking deformation,shear bearing capacity and torsional bearing capacity of each bridge section were calculated and analyzed,and the shear failure area was delineated.With addition of carbon fiber plate in the vulnerable area,the numerical analysis of the original bridge and the bridge reinforced by carbon fiber plate is carried out.It is found that the bridge body strengthened with the carbon fiber plate has a significant improvement in bearing performance,in which the settlement amplitude is reduced by 27%,and the shear torsion resistance is increased by 10%.

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Analysis of the Rhizosphere Soil Bacterial Community Composition of Kiwifruits with Canker Disease and Healthy Kiwifruits

YANG Rui, YAO Di, TANG Yunzhe, ZHANG Jingyi, PENG Qingzhong, WANG Linluosha

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 59-67. DOI: 10.13438/j.cnki.jdzk.2023.01.009

Abstract （281）

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In this work,the rhizosphere soil samples at three stages of kiwifruit development were collected from the kiwifruit planting base in Yongshun County,West Hunan.The bacterial community composition and population abundance in the canker and healthy samples were analyzed by metagenomic sequencing.The results showed that there were some differences in the bacterial community composition and population abundance in three periods of rhizosphere soil samples of the healthy and diseased kiwifruit,but the dominant bacteria mainly included AcidobacteriaGp,Gemmatimonas and Gaiella.The population abundance of Pseudomonas increased and then decreased with three stages of kiwifruit development,coinciding with the process of kiwifruit canker disease,which indicates that the rhizosphere soil bacterial community is one of the infectious sources for the kiwifruit canker occurrence.In addition,it was found the abundance of flavobacteriaceae and comamonadaceae was higher in the canker samples than in the healthy samples,presumably positively correlated with the occurrence of kiwifruit canker disease.The abundances of Rhodospirillaceae,Thermomonosporaceae,Bacillus and Streptomyces were higher in the healthy samples than in the diseased samples,presumably playing an antagonistic role in the occurrence of kiwifruit canker disease.

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Influences of Luteolin on Choroidal Malignant Melanoma Cells

TANG Jing, YUAN Xiaobo, YANG Fan

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 68-76. DOI: 10.13438/j.cnki.jdzk.2023.01.010

Abstract （286）

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The influences of luteolin on the apoptosis,migration and invasion of human choroidal malignant melanoma cells by regulating Wnt/β-catenin signaling pathway have been investigated.The cell viability of human choroidal malignant melanoma cells MuM-2C treated with luteolin at 0,5,10,15,20,25 μmol/L concentrations for 24 h was determined by CCK-8 method to screen the appropriate concentration of drug action.The MuM-2C cells cultured in vitro were randomly grouped into three groups:control group,luteolin group and luteolin + lithium chloride group.After treatment with 15 μmol/L luteolin and 10 μmol/L lithium chloride,flow cytometry and Hoechst 33258 staining were performed to detect the apoptosis of MuM-2C cells;scratch test and Transwell test were performed to detect the migration and invasion of MuM-2C cells in each group;immunofluorescence was applied to detect the expression of apoptotic proteins BAX and BCL-2 in MuM-2C cells in each group;Western blotting was performed to detect the expression of EMT marker proteins (E-cadherin,N-cadherin,Vimentin) and Wnt/β-catenin signaling-related proteins (Wnt1,β-catenin) in MuM-2C cells in each group.The results showed that different doses of luteolin could inhibit the growth of MuM-2C cells,and the effect was enhanced with increasing doses within a certain range.Compared with the control group,the nuclei in the luteolin group were pyknotic,different in size,uneven in coloration,and showed bright blue fluorescence and obvious pathological phenomena of apoptosis,with the apoptosis rate,the ratio of BAX/BCL-2 and the expression of E-cadherin protein obviously increasing (P＜0.05) and the cell migration rate and invasion number,and the expression of N-cadherin,Vimentin,Wnt1 and β-catenin proteins in cells obviously decreasing (P＜0.05).Compared with the luteolin group,the pathological phenomenon of nuclear apoptosis in the luteolin + lithium chloride group was obviously reduced,with the apoptosis rate,the ratio of BAX/BCL-2 and the expression of E-cadherin protein obviously decreasing (P＜0.05) and the cell migration rate and invasion number,and the expression of N-cadherin,Vimentin,Wnt1 and β-catenin proteins in cells obviously increasing (P＜0.05).It can be concluded that luteolin can reduce the viability of MuM-2C cells,promote their apoptosis,and inhibit their migration and invasion by inhibiting the Wnt/β-catenin signaling pathway transduction.

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Effect of Guizhi Fuling Decoction-Containing Serum on Endometrial Cancer Cells

YUAN Xiaobo, TANG Jing, YANG Fan

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 77-83. DOI: 10.13438/j.cnki.jdzk.2023.01.011

Abstract （316）

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The purpose of this study was to investigate the effect of Guizhi Fuling Decoction-containing serum in regulation of endometrial cancer cell proliferation,epithelium-mesenchymal transformation (EMT) and apoptosis through the regulation of inositol 3-phosphate kinase (PI3K) and protein kinase B (AKT).Seventy-two SD rats were divided into healthy group,high-dose Guizhi Fuling Decoction group,middle-dose Guizhi Fuling Decoction group,low-dose Guizhi Fuling Decoction group and oxaliplatin group.Corresponding doses of drugs were given by gavage,and blood was drawn from the abdominal aorta to prepare drug-containing serum.Human endometrial cancer HEC-B cells were cultured and grouped into control group,high-dose drug-containing serum group,medium-dose drug-containing serum group,low-dose drug-containing serum group,oxaliplatin serum group,high-dose drug-containing serum + pathway activator group.Corresponding serum and reagents were added to the cell culture medium of each group.The proliferation of cells in each group was detected by tetramethylazolyl blue (MTT) method;cell apoptosis in each group was detected by flow cytometry;the expression levels of EMT-related proteins E-cadherin (E-cadherin),cellular vimentin (Vimentin),N-cadherin (N-cadherin) and the phosphorylation levels of PI3K/AKT pathway-related proteins were detected by Western Blot.Compared with the control group,the cell survival rate,Vimentin,N-cadherin protein expression,PI3K and AKT phosphorylation levels in the high-dose drug-containing serum group,the medium-dose drug-containing serum group,and the low-dose drug-containing serum group were obviously decreased (P＜0.05);while the apoptosis rate and E-cadherin protein expression were obviously increased (P＜0.05),in a dose-dependent manner.Compared with the high-dose drug-containing serum group,the cell survival rate,Vimentin,N-cadherin protein expression,PI3K and AKT phosphorylation levels in the high-dose drug-containing serum + pathway activator group were obviously increased (P＜0.05),and the apoptosis rate and E-cadherin protein expression were obviously decreased (P＜0.05),and there was no significant difference in each index between the oxaliplatin serum group (P＞0.05).Guizhi Fuling Decoction regulates the PI3K/AKT pathway to inhibit the phosphorylation of related proteins,hinder cell growth,aggravate cell apoptosis,relieve EMT,and thus alleviate the condition of uterine fibroids.

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Literature Research and Explanation of Ethnic Medicine Radix et Caulis Flemigiae,Radix et Caulis Zanthoxyli,Radix et Caulis Rosae

YANG Dequan

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 84-89. DOI: 10.13438/j.cnki.jdzk.2023.01.012

Abstract （505）

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The names,sources,properties,major functions,and clinical applications of Radix et Caulis Flemigiae,Radix et Caulis Zanthoxyli,and Radix et Caulis Rosae are researched in ethnic medicine literature on herbalism.According to the existing standard.the three medicines are the commonly used traditional Chinese medicine (TCM) among the ethnic people of Tujia,Miao,Dong,Yao,Zhuang and other ethnic people.

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Protection and Development of Traditional Sports in Ethnic Villages in China Under the New Historical Conditions

LI Yuwen

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 90-92. DOI: 10.13438/j.cnki.jdzk.2023.01.013

Abstract （293）

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From the perspective of social and cultural changes,the inheritance,protection,and development of traditional sports in ethnic villages in China have been analyzed.It is put forward that under the new historical conditions,four actions can be taken:first,the cultural identity of traditional sports in original ethnic villages should be strengthened;second,the protection of intangible culture heritage of traditional sports in ethnic villages should be enhanced;third,the government protection should be intensified by formulating protection countermeasures；fourth and the last,the inheritance and development of traditional sports in ethnic villages can be reinforced at school.

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Legal Protection of Broadcasting Right of Sports Events in the Internet Age

TANG Zijun, SUN Yingqi

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (1): 93-96. DOI: 10.13438/j.cnki.jdzk.2023.01.014

Abstract （481）

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The sports industry has become the pillar industry of China's national economy.Among them,the sports event broadcasting industry,which is generated by the broadcasting of sports events through emerging media such as TV and the Internet,is an important part of it.The broadcasting right of sports events is the core right of the sports event broadcasting industry.However,in practice,there are many disputes surrounding it,and the legal protection is insufficient.Relevant legal provisions are scattered in copyright law,contract law,anti-unfair competition law and other laws.Therefore,in order to promote the healthy development of sports industry in China,relevant legislation should be accelerated.The broadcasting right of sports events should be included in the protection of intangible property rights,and in the regulation of broadcasting organization rights,thereby creating a strong legal protection mechanism.

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Differentiability for Measure Neutral Functional Differential Equation

TIAN Rui, LI Baolin

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 1-6. DOI: 10.13438/j.cnki.jdzk.2023.02.001

Abstract （304）

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In the framework of the theory of generalized ordinary differential equations,by virtue of the one-to-one correspondence between measure neutral functional differential equations and generalized ordinary differential equations,sufficient conditions for differentiability of measure neutral functional differential equations are put forward.On the basis of defining a new operator Ψ(λ,y)(t),differentiability for measure neutral functional differential equations is proved.

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Reachable Set Boundary Estimation for Neutral Markovian Jump Systems

ZHANG Xipan, SHEN Changchun

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 7-16. DOI: 10.13438/j.cnki.jdzk.2023.02.002

Abstract （333）

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By constructing an appropriate Lyapunov functional and using the improved Wirtinger integral inequality combined with the free-weighting matrix idea and the time-delay segmentation method,we have obtained the boundary conditions for the small reachable set of a class of neutrual Markovian jump systems (NMJSs) with distributed delay in the form of linear matrix inequalities.

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Reachable Set Estimation for Generalized Semi-Markov Jump Systems

PENG Chunyuan, SHEN Changchun

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 17-23. DOI: 10.13438/j.cnki.jdzk.2023.02.003

Abstract （359）

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Based on Lyapunov functional method,the reachable set boundary estimation problem for a class of singular semi-Markovi jump systems with time-varying delays is studied.Firstly,the boundary of the fast and slow subsystem is obtained by the piecewise analysis method and integral inequality technique.Then,the upper and lower boundary of semi-Markov transfer rate is used to deal with the problem of abnormal transfer rate.Finally,the sufficient condition of the existence of the reachable set boundary of the system is given in the form of linear matrix inequality.

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An Improved Whale Optimization Algorithm Based on Levy Flight and Brownian Motion

YU Cunwei, MO Liping, WAN Runze

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 24-32. DOI: 10.13438/j.cnki.jdzk.2023.02.004

Abstract （682）

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A whale optimization algorithm based on Levy flight and Brownian motion is designed to overcome the disadvantages of whale optimization algorithm such as low accuracy,slow convergence and easiness to fall into local optimum.First,Levy flight method is used to initialize the whale population to increase the diversity of the initial population.Then,according to the principle of Brownian motion,the position update of the whale population is randomly perturbed to avoid the algorithm falling into local optimization in advance.The improved whale optimization algorithm is compared with whale optimization algorithm,particle swarm optimization algorithm,genetic algorithm and ant colony optimization algorithm on seven different benchmark test functions.The experimental results show that the improved whale optimization algorithm is superior to the other four algorithms in terms of solution accuracy and convergence speed.At the same time,simulation and comparison experiments are carried out on the initial solution exploration range of the improved whale optimization algorithm using Levy flight strategy and the whale optimization algorithm using random search strategy in the initialization stage.The experimental results show that the improved whale optimization algorithm can avoid falling into local optimization in a certain program.

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A Novel MEHM Blind Spectrum Sensing Algorithm Based on Random Matrix Theory

LIU Tingting, LEI Kejun, TAN Zhewen, TIAN Chong, TIAN Xinxin, YANG Xi

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 33-38. DOI: 10.13438/j.cnki.jdzk.2023.02.005

Abstract （390）

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A novel maximum eigenvalue-harmonic mean (NMEHM) blind spectrum sensing algorithm is proposed,using the results of the distribution of the limiting eigenvalues of the sample covariance matrix in random matrix theory.The proposed algorithm significantly improves the detection performance of the traditional MEHM algorithm and achieves better detection performance than the classical eigenvalues-based detection algorithms;at the same time,the proposed algorithm does not require a priori knowledge of the primary user signal and wireless channel,which can availably overcome the effect of noise uncertainty.Simulation results demonstrate the validity of the proposed algorithm.

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Shock Absorption Effect of Shock Absorbing Layer Settings of Urban Utility Tunnel

CUI Guangyao, KE Xu, GUO Yanjun

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 39-46. DOI: 10.13438/j.cnki.jdzk.2023.02.006

Abstract （379）

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To improve the seismic resistance behavior of the soft-stratum of urban utility tunnel in strong earthquake areas,this paper takes the utility tunnel as the research object and studies,the shock absorption effect of the shock absorbing layer with different settings through finite difference software FLACD.The results show that compared with the condition without seismic measures,the maximum settlement of the condition with the bedding shock absorbing layer decreases by 1.61%,the maximum and minimum principal stresses decrease by 29.75% and 4.88% respectively,the maximum shear stress decreases by 18.49% and the minimum safety factor increases by 15.13%;the maximum settlement of the condition with setting a semi-ring shock absorbing layer decreases by 1.55%,the maximum and minimum principal stresses decrease by 34.12% and 18.06% respectively,the maximum shear stress decreases by 31.86% and the minimum safety factor increases by 18.33%;the maximum settlement of setting a full-ring shock absorbing layer decreases by 16.92%,the maximum and minimum principal stresses decrease by 61.04% and 28.84% respectively,the maximum shear stress decreases by 35.78% and the minimum safety factor increases by 32.46%.It can be concluded that the shock absorption effect of setting a full-ring shock absorbing layer is better than the cushion layer and the semi-ring layer.

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Antibacterial Activity and Identification of Endophytic Fungi YDZ-8 Isolated from Lavandula angustifolia Mill.

CHEN Tianyi, BAIDOULA·Nulan, TUERDEBIEKE·Mayila, ENTOMACKY·Borrathyba

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 47-51. DOI: 10.13438/j.cnki.jdzk.2023.02.007

Abstract （313）

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The endophytic fungi were isolated from the roots of Lavandula angustifolia Mill. by surface disinfection method and tissue isolation method,and the antibacterial activity against the Staphylococcus aureus was evaluated by paper disk diffusion method.The active isolates were identified in terms of their morphological features by phylogenetic analysis based on ITS sequence of rDNA gene.The results showed that the endophytic fungi of YDZ-8 had remarkable antibacterial activity against Staphylococcus aureus strain CGMCC1.872.Fungal morphological and molecular identification demonstrated that the endophytic fungi strain YDZ-8 represented Trichoderma harzianum.

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Effect of Diammonium Glycyrrhizinate on Apoptosis in Rats with Ulcerative Colitis

SHENG Yihua, ZHOU Minggao, FAN Taiping, TAN Xiaowen, ZENG Xingyao, LI Ping, LI Sidi

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 52-57. DOI: 10.13438/j.cnki.jdzk.2023.02.008

Abstract （360）

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To explore the effect of diammonium glycyrrhizinate on apoptosis of peripheral blood inflammatory cells in rats with ulcerative colitis.UC model was induced by TNBS and ethanol,both with colonic mucosa tissue,which were assigned into four groups,namely control group,model group,western medicine group (administrated by sulfasalazine enteric-coated tablets),and licorice group (administrated by diammonium glycyrrhizinate).Pathomorphological changes of colon tissue were dynamically observed in the 0,2^nd,and 4^th week after model establishment,and the apoptosis rates of LPL and PMN in the blood were dynamically observed by flow cytometry in the 2^nd and 4^th week respectively.Compared with the control group,pathological changes in colon tissue were showed in model group by HE staining,and the colon wet weight and the colon weight index increased.Compared with the model group,the pathological changes of colon tissue in DG group and western medicine group were recovered in a certain degree in the 2^nd and 4^th week.The colon wet weight and colon weight index decreased significantly in DG group in the 4^th week.Apoptosis of LPL and PMN in blood of UC model was delayed in the 2^nd week after model established,while DG and western medicine promoted poptosis of LPL and PMN.In the 4th week,apoptosis rate of LPL in UC model still decreased,but apoptosis rate of LPL in DG and western medicine group was higher than that of model group.It can be concluded that DG and sulfasalazine enteric coated tablets can still improve the apoptosis rate of LPL.Occurrence and development of ulcerative colitis is related with apoptosis reduction of LPL and PMN to some degree.DG can relieve UC through regulating apoptosis rate of LPL and PMN in blood.

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Effect of Plant Rodenticides on the Reproduction Performance of Female Microtus fortis

YANG Dongmei, ZENG Sichun, TAO Shuanglun, LI Anna, LI Jiacheng, HE Qian, LI Shuang, LI Junnian

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 58-63. DOI: 10.13438/j.cnki.jdzk.2023.02.009

Abstract （293）

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To measure the effects of plant rodenticide on reproductive performance of Microtus fortis,the effects of plant rodenticide on serum estrogen,reproductive organ index，litter size and reproductive delay of Microtus fortis were studied by one-time gavage in laboratory.The results showed that different doses of plant rodenticide significantly increased the uterine index and changed the uterine morphology of M. fortis,but did not affect the level of serum estradiol and uterine length.The serum follicle-stimulating hormone (FSH) content and ovarian index of female voles gavaged 50 mg/kg rodenticide were significantly increased.It is showed that different doses of plant rodenticide could delay the time of first reproduction and litter size of female M. fortis,and the recovery time of reproduction in female M. fortis gavaged 10 mg/kg,25 mg/kg and 50 mg/kg groups was 11 d,22 d and 48 d longer than that of the control group,respectively.

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Anti-COVID-19 Pandemic Effect of Plant Flavonoids: Use of Green Tea Flavonoids

Deyu Xie, Seyit Yuzuak, Yue Zhu, Qingzhong Peng

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 64-86. DOI: A10.13438/j.cnki.jdzk.2023.02.010

Abstract （267）

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In 2020,we reported that flavan-3-ol gallates (F3Gs),dimeric proanthocyanidins (PAs),and F3Gs and PA-rich extracts of green tea inhibited the activity of the main protease of SARS-CoV-2.Recently,we reported that F3Gs and other flavonoids inhibited the replication of human coronavirus 229E in human cells.In addition,a large number of articles reported the beneficial effects of green tea and flavonoids on the therapy of COVID-19.Since December 2020,we have continued to use demographic and ethno-pharmaceutical approaches to investigate the use of green tea during the recovery of COVID-19 volunteers in USA and Turkey.We collected data from more than 23 people who used green tea during their recovery at home in USA and five consented to report their recovery experience.We collected detailed recovery information from 100 volunteers (from 20-month to 96 years old) in Turkey,who only used green tea for their recovery without any medical assistance.A pearson correlation coefficient (PCC) analysis indicated a negative correlation between the recovery days and the daily green tea cups consumed by those Turkish volunteers.The more cups of tea they drank,the fewer days they needed for their recovery.Furthermore,the data of the annual per capita tea consumption (PCTC) were obtained from 208 and 100 countries in 2020 and 2021,respectively.Turkey had the highest PCTC values,3.0 and 3.4 kg in 2020 and 2021 and their COVID-19 death rates were lower than 1%.People in many countries of Latin America did not drink tea,while the death rates were relatively high.For example,Mexico had the highest death rate in 2020,about 11%.Furthermore,the average death rates of COVID-19 were calculated for 115 and 121 countries in 2020 and 93 countries in 2021.PCC analysis indicated a promising negative association between PCTC and death rates in these countries.The more tea infusions were consumed,the lower the death rates of COVID-19 occurred.These data indicate that the valuable benefit of tea especially green tea to help the recovery from COVID-19 and reduce death (All data were approved for publication by the institutional review board (IRB),the Ethic Commission for Un-Interventional Clinical Studies,and volunteers).

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Diversity of Wild Medicinal Plant Resources and Correlation Analysis of Medicinal Material Properties in Dehang Scenic Spot of Hunan Province,China

TAN Lu, XIANG Xiaomei, LIU Bing, WANG Zhicheng, CHEN Gongxi

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 87-95. DOI: 10.13438/j.cnki.jdzk.2023.02.011

Abstract （207）

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Correlation between medicinal material properties and diversity of wild medicinal plant resources in Dehang scenic spot was analyzed.The species composition,the life forms,the geographical distribution and the medicinal parts were statistically analyzed by field investigation,specimen arrangement and literature review.On this basis,association rule method was used to analyze the correlation between medicinal plant family and genus,medicinal chemical composition and medicinal efficacy.The results show that there are 617 species of wild medicinal plants belonging to 406 genera and 137 families in Dehang scenic spot.The life forms are mainly herb.As for the floristic geographical distribution at the family level,the medicinal plant flora is mainly global and pan-tropical;at the genus level,the medicinal plant flora is mainly north temperate and pan-tropical;and at the species level,the medicinal plant flora is mainly East Asia.The medicinal parts are mainly the whole plant,roots and rhizomes.A total of 36 strong association rules were screened by association rule analysis,among which liliaceae-saponins,zanthoxylum-alkaloids are highly correlated in terms of chemical components,and Liliaceae-expectorant cough suppressant and anti-asthmatic drug,and Hypericum-styptic are highly correlated in terms of medicinal efficacy.The results show that species of the medicinal plants are rich in Dehang scenic spot and their life forms are diverse.The floristic geographical composition is complex.According to the correlation between medicinal plant family,chemical composition and efficacy,it can be concluded that new drugs with better efficacy and less toxicity can be found in nature.

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Journal of Jishou University(Natural Sciences Edition) 2023, 44 (2): 96-96.

Abstract （150）

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Construction and Properties of Two-Level Optimal Column Augmented Designs

ZHANG Shixian, TIAN Jiezhong, BAI Qiming, LI Hongyi

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 1-7. DOI: 10.13438/j.cnki.jdzk.2023.03.001

Abstract （224）

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In order to construct augmented designs more flexibly,the author uses a method without computer search which begins with an initial design with less number of columns and transforms by some rules to construct two-level optimal column augmented designs.In addition,the relationship between the column augmented designs and their initial designs is discussed under the E(s) criterion,the generalized minimum aberration criterion and the minimum moment aberration criterion.

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Estimations of a Ros Deficit

GUO Ruyi, MEI Jingfang

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 8-12. DOI: 10.13438/j.cnki.jdzk.2023.03.002

Abstract （239）

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The upper and lower bounds of a Ros deficit are obtained with the geometric quantities such as the area of the involute line and Wigner caustics of the plane strictly closed convex curve Γ.

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Secure Top-k Query Scheme with Strong Privacy Protection in Cloud Computing Environment

CUI Shaogang, YIN Hui, ZHOU Chunguang

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 13-28. DOI: 10.13438/j.cnki.jdzk.2023.03.003

Abstract （211）

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In a multi-user application scenario,the cloud can collude with a data owner or a data user to infer an authorized user's query contents.In this paper,we first present the collusion attack model in cloud environments and implement an efficient and strongly privacy protective search scheme.This scheme employs dynamical and secure searchable index construction which not only guarantees the data confidentiality but also extremely fits into the multi-user cloud computing environments where data files are dynamically uploaded frequently,enhancing the availability and scalability of the whole system greatly as well.In addition,in order to satisfy users' individual search requirements,our scheme supports secure relevance ranking for query results according to keyword weight,thus implementing secure top-k query.

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Binocular Stereo Matching Algorithm Based on Improved Census Transform

AN Geng, YANG Fenlin, ZHOU Mengyuan, DOU Xinrui

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 29-33. DOI: 10.13438/j.cnki.jdzk.2023.03.004

Abstract （332）

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For the problem that the gray value of the center point of the traditional Census transform window is easily affected by noise and the global matching accuracy is low,a binocular stereo matching algorithm based on improved Census transform is proposed.First,the template value of bilateral filtering is used to replace the gray value of the center point of the Census transform window.In order to enhance the reliability of the initial cost calculation,Sobel operator and the absolute error of gray level and the matching cost of the algorithm are added for cost fusion.Then the dynamic cross region is selected to establish the relationship between adjacent parallaxes.Finally,the winner-take-all strategy is used to select the best disparity,and left and right consistency detection and guided filtering are used to optimize the disparity map.The experimental results show that compared with the traditional Census transform,the average mismatch rate of the algorithm is reduced by about 46% in the noiseless case and 53% in the noisy case.It is concluded that the improved algorithm has better accuracy and anti-noise ability.

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Optimal Multiband Collaborative Spectrum Sensing Algorithm Based on Constrained PSO Algorithm

TIAN Chong, LIU Tingting, TAN Zhewen, TAN Yuhao, LEI Kejun, YANG Xi

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 34-38. DOI: 10.13438/j.cnki.jdzk.2023.03.005

Abstract （293）

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For the difficulties in controlling the total interference of the system with unconstrained PSO algorithm,an optimal multiband cooperative spectrum sensing method based on constrained Particle Swarm Optimization (PSO) algorithm is proposed.This algorithm transforms the constrained optimization problem into an unconstrained optimization problem by introducing a penalty function.Compared with the traditional solutions based on unconstrained PSO algorithm,the proposed constrained PSO algorithm can effectively solve the constrained multiband cooperative spectrum sensing optimization problem,and the optimal solution meets the constraints to avoid excessive total interference.

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Experimental Study on Flexural Behavior of Finger-Jointed Timber Beams Strengthened with CFRP Sheets

WANG Jianxing, JIA Yumeng, XUE Meihui

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 39-45. DOI: 10.13438/j.cnki.jdzk.2023.03.006

Abstract （206）

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In order to improve the flexural strength of finger-jointed timber beams,three groups of timber beams were designed and manufactured.Through four-point compression test,the flexural performance of solid timber beams,finger-jointed timber beams and CFRP reinforced finger-joint beams were compared,and the influence of finger-jointed joints on the fracture mode of timber beams was analyzed.The displacement load curve of finger-jointed timber beams and the displacement load curve of finger-jointed timber beams were obtained,and the corresponding distinction was given for the failure characteristics of each type.Therefore,the feasibility of using CFRP to reinforce finger-joint is proposed.The test results show that the appearance of finger-joint has obvious influence on the bending failure process of timber.The appearance of finger-joint makes the fracture mode of timber change from ductile fracture to brittle fracture,and the flexural strength of finger-joint timber beam is significantly improved by using CFRP cloth reinforcement.

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Investigation and Research on Wild Edible Plant Resources in the Mountaintop Platform of Zhangjiajie Tianmenshan National Forest Park,Hunan Province

LI Yuxuan, JIN Jia, HU Jian, CHEN Gongxi, XIANG Xiaomei

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 46-53. DOI: 10.13438/j.cnki.jdzk.2023.03.007

Abstract （266）

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In order to understand the current situation of wild edible plant resources in the mountaintop platform of Tianmenshan National Forest Park in Zhangjiajie,the wild edible resources in this area were statistically analyzed by field investigation,specimen collection and literature review.The results showed that there were 134 species of wild edible plants belonging to 102 genera and 49 families in the Mountaintop platform of Tianmenshan.Among them,Rosaceae,Compositae and Lily were the dominant families,and Rubus was the dominant genus.Herbs were the main life forms.The geographical composition of species is complex and diverse,with the largest proportion of endemic species in China.The edible category is mainly wild vegetables,and the nutritional value is the largest proportion of fiber.The edible part is mainly leaves,and the cooking method is mainly frying.The edible plant resources on the mountaintop platform of Tianmenshan are rich in species,diverse in cooking methods,and high in nutritional value.

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Pollution Characteristics and Pollution Sources Analysis of SO₂,O₃and NO₂ in Hefei High-Tech Zone

ZHENG Nina, XU Yaqi, PAN Lingyang

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 54-60. DOI: 10.13438/j.cnki.jdzk.2023.03.008

Abstract （198）

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In this paper,the atmospheric SO₂,O₃ and NO₂ of Hefei High-tech Zone are continuously observed using long-path differential absorption spectroscopy system,and the characteristics of gas pollution and possible pollution sources are analyzed.The diurnal variation shows that SO₂ is high at night and low during the day.The diurnal variation of NO₂ shows a single peak and single valley type.The rush hour of off-duty traffic has certain effect on NO2.But the whole day concentration of NO₂ is on the high side (35~45 μg/m) and the variation is small,so there exist other important nitrogen oxide emission sources.The diurnal variation of O₃ is obvious.Its daytime concentration is high,and the maximum value appears at 16:00 in the afternoon;the concentration is low at night,and the lowest value appears on the early morning.The concentration of NO₂ and SO₂ in winter is high because of low atmospheric boundary layer.In summer,photolysis reaction is intense,wet deposition is obvious,so the concentration of pollutants is low.On the contrary,the seasonal variation of O₃ is contrary.The analysis of pollution sources shows that the high SO2 value is mainly related to the coal burning of rural residents in the northwest of the observation site and the unorganized emission of pharmaceutical companies and paint factories in the southeast of the observation site.However,the high value of NO₂ in the east-northeast (wind speed > 6 m/s) wind direction is affected by the long-distance transmission from Hefei Wanneng Power Plant and vehicle exhaust emissions in busy urban areas.The wind speed and direction distribution of O₃ and NO₂are basically opposite.The correlation coefficient of NO2 and O₃ is only -0.429 6.There are other important O3 precursor pollutants in the atmosphere of Hefei Hi-tech Zone.

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Identification of Cellulose Degrading Bacteria in Namco Yak Dung and Its Enzyme Production Characteristics

LI Qiang, LUO Jin, YANG Jianing, GAO Hongtao, LIU Xuan, HE Jianwu

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 61-65. DOI: 10.13438/j.cnki.jdzk.2023.03.009

Abstract （193）

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Through enrichment and purification,high efficient cellulose degrading strains were screened from yak dung in Namco Lake,Tibet.The enzyme production characteristics of cellulose degrading strains under different conditions were determined,and the genetic differences of the target strains were analyzed.The results showed that strain X1 and X2 had significant cellulose degradation advantage,and the relative enzyme activities of the two strains were strong at pH 4 and 9 ℃.Phylogenetic analysis showed that X1 and X2 might belong to the genus Cronobacter.

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Resistance to Kiwifruit Bacterial Canker and Its Correlation with Sugar Content in Branches of Kiwifruit Varieties

GAO Jianyou, KUANG Meimei, LUO Qin, TAN Zecheng, CUI Lihong, ZHA Manrong, LIU Shibiao

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 66-72. DOI: 10.13438/j.cnki.jdzk.2023.03.010

Abstract （217）

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In the present experiment,the resistance identification and evaluation of total 13 kiwifruit cultivars in Actinidia chinensis and A. chinensis var. deliciosa to Pseudomonas syringae pv. actinidiae (Psa) was conducted indoors by using wounding method on detached branches.The results showed that the incidence rate,onset time and lesion length of the isolated branches in all tested materials were significantly different after pathogenic bacteria inoculation.The order of resistance of the above cultivars was listed as follows:Miliang-1＞Miliang-2＞Chuhong＞Cuiyu＞Beimu＞Xiangbiyu＞Xiangji＞Xiangjihong＞Wuzhi-3＞Jinyan＞Donghong＞Guichang＞Hongyang,according to the disease lesion length from small to large,at the 25 d after infected Psa.A. chinensis var. deliciosa Miliang-1 was evaluated as the high resistance (HR) cultivar and A. chinensis Hongyang as the high susceptibility (HS) cultivar.The content of soluble sugar in branches decreased significantly after infected Psa,and the higher of the soluble sugar content after infection,the stronger resistance the cultivar had.However,no correlation was observed between the Psa resistance and reducing sugar content,lenticels characters and cortex thickness,respectively.

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Effects of Different Treatment on Seed Germination of Endangered Species Terminalia myriocapra

YU Xiao, ZHAO Zhenning, DENG Lilan

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 73-79. DOI: 10.13438/j.cnki.jdzk.2023.03.011

Abstract （177）

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In this study,the effects of different exogenous hormones (GA3,NAA) and culture temperature on germination of the seeds were studied after hibernation treatment and indoor temperature presermation.The results showed that the type and concentration of growth regulator had significant effects (P<0.01),but the preservation method and culture temperature had no significant effects on the germination rate of seeds (P>0.05).The degree of influence was the type of growth regulator,the concentration of growth regulator,culture temperature and preservation method in descending order.After the seeds were treated with the same mass concentration of GA3 and NAA growth regulator,the germination rate of seeds was successively from high to low in variable temperature culture in hibernation treatment,constant temperature culture in hibernation treatment,constant temperature culture under normal temperature preservation,and constant temperature culture under normal temperature preservation.The optimal conditions for seed germination were treated at 4 ℃ for 30 days after seed collection,impregnated with 40 mg/L GA3 and cultured at 15~25 ℃ in a light incubator.

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Comparative Choices for Enterprise Data Usage Rights Protection

DENG Shuyuan

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 80-86. DOI: 10.13438/j.cnki.jdzk.2023.03.012

Abstract （203）

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Circulation and sharing of data helps promote the prosperity of the digital economy market,and gives enterprises the rights to use data in line with economic development.The key to realizing the value of data lies in the collection,use and sharing of data,and enterprises will turn the information data held by individuals into data with market transaction value after reprocessing and processing such as desensitization.In the "individual-enterprise" data binary structure,in order to avoid the deadlock of the protection mechanism for use and sharing of data,the dispute over data ownership should be temporarily shelved and a data use and sharing mechanism should be established for enterprises.The foothold of the mechanism will be shifted from the perspective of personal interests to the perspective of social interests,and the rational use system of data and the data access system will be clarified,so as to promote the free circulation and full sharing of data and maximize the value of data.

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A Survey on Employment of Statistics Graduates from Universities in Western Regions

CHEN Wangxue, PAN Hao

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 87-90. DOI: 10.13438/j.cnki.jdzk.2023.03.013

Abstract （252）

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Taking the employment data of statistics graduates of Jishou University from 2015 to 2019 as a case,this paper analyzes the employment of graduates from three aspects of employment industry,employment position and employment region.The results indicate that the employment situation for statistics graduates is optimistic,characterized by multiple choices in employment industries and strong professionalism in employment positions.Based on the current employment status,some suggestions are put forward to improve the employment competitiveness of statistics graduates.

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Difficulties and Countermeasures of Blockchain Technology Application in Sports Industry

KE Yangning

Journal of Jishou University(Natural Sciences Edition) 2023, 44 (3): 91-96. DOI: 10.13438/j.cnki.jdzk.2023.03.014

Abstract （306）

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The application of blockchain technology in sports industry can promote decentralization,build trust mechanism,realize data value,strengthen property protection,and make sports industry a new source of power to promote high-quality economic development.However,the development of "blockchain + sports industry" is faced with such practical difficulties as prominent bottleneck of blockchain technology application,lack of compound talents,insufficiency of regulatory means,and application to be expanded.From improving the top-level design,increasing R & D investment,innovating regulatory technology,and strengthening personnel training,effective countermeasures are put forward for blockchain technology to drive the innovation and development of China's sports industry,so as to help the healthy and efficient development of "blockchain + sports industry".

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