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Research Progress of Structure and Function of Nuclear Transcription Factor Relish ZHANG Hong, LIU Qingzhen Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 77-83.   DOI: 10.13438/j.cnki.jdzk.2024.01.013 Abstract （397）      PDF（pc） （470KB）（747）       Knowledge map    Save The nuclear transcription factor Relish is a member of the NF-κbs superfamily functioning as an important immune signaling effector.Relish contains a conserved Rel homologue domain at the N-terminal and an ankyrin repeat domain at the C-terminal.Relish is actived in response to certain external stimulations transmitted by the Imd pathway,via phosphorylation,cleavage and other posttranslational modification of Relish.Activated Relish then translocates to nuclear and binds to DNA to regulate the expression of target genes,helping organisms to adapt to various physiological environments and stimuli,resisting the invasion and infection of foreign pathogens.The paper provides an brief review of the structure and function of Relish.The structural features of Relish include Rel homology domain,ankyrin repeats domain,nuclear localization sequence,caspase target site,serine-rich regions,and proline-glutamate-serine-rich domain.Functions of Relish mainly involve participating in innate immunity,regulating neural development and lifespan,regulating intestinal homeostasis and morphology,participating in stress regulation and other physiological activities. Reference | Related Articles | Metrics | Comments（0）

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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 （981）      PDF（pc） （1094KB）（705）       Knowledge map    Save 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. Reference | Related Articles | Metrics | Comments（0）

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Complete Chloroplast Genome of Clematis ranunculoides:Characterization and Phylogeny Analysis WANG Ruolan, ZHANG Dequan Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 66-76.   DOI: 10.13438/j.cnki.jdzk.2024.01.012 Abstract （219）      PDF（pc） （8763KB）（648）       Knowledge map    Save To reveal the chloroplast genome characteristics of Clematis ranunculoides and its phylogenetic relationships,the present study adopted the Illumina platform to acquire high-throughput sequences,which were used for assemble,annotate,and characterize the complete chloroplast genome of C. ranunculoides.And then molecular phylogenetic trees were constructed with maximum parsimony (MP),maximum likelihood (ML) and Bayesian (BI) methods.The result shows that the total length of the chloroplast genome of C. ranunculoides is 159 741 bp,which encodes 112 genes,including 79 protein-coding genes,29 tRNA genes and 4 rRNA genes;there are 84 SSRs in the chloroplast genome of C. ranunculoides,and 57 of them are mono-nucleotide.Analysis of codon usage bias reveales that leucine is the most frequently utilized amino acid in the chloroplast genome.The topological structures are basically identical among MP,ML,and BI trees.Derived from the phylogenetic trees,Clematis is a monophyletic group,closely related to Anemone.And C. ranunculoides is closest to C. montana,which supportes the traditional classification results. Reference | Related Articles | Metrics | Comments（0）

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Optimal Slip Ratio Identification Estimator Design Based on μ-S Model WANG Bo, DING Fang, LIU Mingyan, TIAN Miaofa Journal of Jishou University(Natural Sciences Edition)    2023, 44 (5): 48-56.   DOI: 10.13438/j.cnki.jdzk.2023.05.007 Abstract （268）      PDF（pc） （1442KB）（472）       Knowledge map    Save In order to achieve optimal control of the automotive anti-lock controller based on slip ratio identification,an optimal slip ratio identification estimator is designed based on the Kiencke μ-S model using an improved forgetting factor recursive least squares algorithm,and the estimation results of the identification estimator regarding the optimal slip ratio and peak adhesion coefficient are compared with those under the Burckhardt μ-S model.The discriminative estimator is applied to the fuzzy sliding mode controller of the automotive anti-lock braking system,and simulation experiments are conducted under single pavement and variational pavement conditions.The experimental results show that the discriminative estimator has small errors and delays,and the anti-lock controller based on the optimal slip ratio identification can achieve online identification and fast tracking of the optimal slip ratio and effectively improve the braking efficiency. Reference | Related Articles | Metrics | Comments（0）

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Research Status of Chinese Ethnic Traditional Sports Based on Knowledge Graph Visual Analysis LI Ping, WU Mengyi, ZHOU Zili, ZHANG Chunxiao Journal of Jishou University(Natural Sciences Edition)    2023, 44 (4): 91-96.   DOI: 10.13438/j.cnki.jdzk.2023.04.011 Abstract （480）      PDF（pc） （3959KB）（463）       Knowledge map    Save Taking the research on traditional ethnic sports in China in recent 10 years as an example,this paper uses CiteSpace 6.1.R6 software and makes visualization analysis  of 211 core journal papers and 710 master and doctoral papers collected in CNKI database from 2010 to 2022,and analyzes the development of traditional ethnic sports from the chronological perspective.The results showed that in 2017,the number of papers published in the core journals of ethnic traditional sports research reached its peak,and then the number of related literatures decreased.The overall development trend can be summarized into three periods,namely stable period,peak period and cool-off period.Research hotspots include inheritance,development,traditional sports and sports culture,etc.The key words include "current situation","colleges and universities","development situation" and "Wushu".The research field mainly focuses on the connotation,development,inheritance and innovation of traditional national sports.The development of Chinese ethnic traditional sports has begun to take shape.The future research trend will be explored with the requirement of modernization development as guidance. Reference | Related Articles | Metrics | Comments（0）

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Synthesis,Crystal Structure of the Novel Rhodium（Ⅱ） Complex LIU Xue, TIAN Yiran, FENG Yangyang, XU Mingming, CHEN Honglai, HOU Wenming, ZHANG Zhenqiang, LIU Weiping Journal of Jishou University(Natural Sciences Edition)    2023, 44 (4): 55-68.   DOI: 10.13438/j.cnki.jdzk.2023.04.007 Abstract （455）      PDF（pc） （10002KB）（378）       Knowledge map    Save Using rhodium（Ⅱ） acetate and trimethylrhodium acetate（Ⅱ） as the raw material,with 3,6-dibromo-9-(4-pyridinemethyl)-9H-carbazole (DBPMC1) and 3,6-dibromo-9-(3-pyridinemethyl)-9H-carbazole (DBPMC) as axial ligands,four rhodium（Ⅱ） carboxylates axial dibromo-9-pyridylmethyl-9H-carbazole complexes Rh(OOCR)4(DBPMC) were designed and synthesized.The single crystals of compounds were successfully cultured and their chemical structures were initially characterized by modern analytical methods such as H NMR,13C NMR and FT-IR.The results show that none of these four compounds has been reported in the literature,and they belong to a new type of rhodium carboxylate （Ⅱ） axial complex.The structure of the complex was determined by X-ray single crystal diffraction analysis to be composed of one molecule of rhodium（Ⅱ） carboxylate and two molecules of DBPMC ligand,and the molecular structure diagram and unit cell stacking diagram were drawn. Reference | Related Articles | Metrics | Comments（0）

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Entanglement Dynamics of Three-Level Atoms with Light Fields QING Jiayang, WU Yunwen Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 44-49.   DOI: 10.13438/j.cnki.jdzk.2023.06.008 Abstract （226）      PDF（pc） （870KB）（359）       Knowledge map    Save The system of three-level atom interacting with light field is studied by using the method of full quantum theory.Based on wave function,the dynamic evolution characteristics of different quantum states with the same coupling intensity are studied.In addition,the influence of different coupling intensity of the same quantum state on the dynamic evolution characteristics of the system is discussed.The results show that under the same coupling intensity,the population values of atoms in |b1> states first decrease and then increase with time,the population values of atoms in |b2> states and |b3> states first increase and then decrease with time,and the corresponding population values of |b2> states produce three peaks in the same period.The population values corresponding to the |b3> states produce two peaks in the same period,and there is also a trough after the first peak,and the population values of different quantum states show periodic oscillations with time.In the same quantum state,with the increase of the coupling coefficient,the dynamic evolution oscillation characteristics of the quantum state between the light field and atoms are enhanced,and the system dynamic evolution pattern always maintains periodic changes with the increase of time. Reference | Related Articles | Metrics | Comments（0）

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Key Genes for Polysaccharide Synthesis Pathway from Polygonatum Based on WGCNA WANG Rong, MENG Ran, CHEN Xuemei, MENG Ying Journal of Jishou University(Natural Sciences Edition)    2023, 44 (5): 64-71.   DOI: 10.13438/j.cnki.jdzk.2023.05.009 Abstract （304）      PDF（pc） （6658KB）（358）       Knowledge map    Save In order to find possible key genes related to the synthesis of polysaccharides in Polygonatum,this study explored the correlation between the expression patterns of core genes in leaves and rhizomes of Polygonatum cyrtonema Hua and Polygonatum odoratum (Mill.) Druce in combination with polysaccharide synthesis pathways from KEGG database using transcriptome data with expression difference and weighted gene co-expression network analysis (WGCNA).Our results indicated that FBA (fructose-bisphosphate aldolase) and GOLS (galactinol synthase) showed a strong correlation in Pearson linear regression calculation,which demonstrated that they are possible key genes for polysaccharide synthesis pathway in Polygonatum. Reference | Related Articles | Metrics | Comments（0）

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Lattice Boltzmann Numerical Method for the Extended Fisher-Kolmogorov Equation FENG Yingxin, DAI Houping, WANG Chen, WEI Xuedan Journal of Jishou University(Natural Sciences Edition)    2023, 44 (4): 19-30.   DOI: 10.13438/j.cnki.jdzk.2023.04.003 Abstract （367）      PDF（pc） （2738KB）（356）       Knowledge map    Save A new numerical format for solving the extended Fisher-Kolmogorov (EFK) equation is constructed based on the lattice Boltzmann method.The Taylor expansion and Chapman-Enskog multiscale expansion techniques are used to obtain the local equilibrium state distribution functions and correction functions of the lattice Boltzmann model for the one-and two-dimensional EFK equations,and to further recover the corresponding macroscopic equations.On this basis,stability conditions for the iterative format of the model are derived,and the model is used to solve the initial marginal value problem of the EFK equation. Reference | Related Articles | Metrics | Comments（0）

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Delayed Predator-Prey Model with Stage-Structure and Cannibalism ZHANG Zizhen, ZHANG Weishi Journal of Jishou University(Natural Sciences Edition)    2023, 44 (4): 1-8.   DOI: 10.13438/j.cnki.jdzk.2023.04.001 Abstract （376）      PDF（pc） （1054KB）（335）       Knowledge map    Save A delayed predator-prey model with stage-structure in prey population and cannibalism in predator population is studied in the present paper.Taking the pregnancy delay of predator population as the bifurcation parameter,local asymptotic stability and existence of local Hopf bifurcation of the model are discussed by using the eigenvalue method,and the critical value of the delay at which the local Hopf bifurcation exhibits is derived.Then,the properties of the Hopf bifurcation are studied by means of the central manifold method.Finally,a simulation example is performed to verify the correctness of the obtained results. Reference | Related Articles | Metrics | Comments（0）

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Tunable Dual-Frequency Perfect Absorber with Graphene ZHAO Jinyun, SHAN Xinyu, GAO Guangbo, HUANG Yonggang Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 37-43.   DOI: 10.13438/j.cnki.jdzk.2023.06.007 Abstract （276）      PDF（pc） （3283KB）（328）       Knowledge map    Save A tunable dual-frequency perfect absorber consisting of a graphene resonator,a SiO2 dielectric layer and a metal reflector layer has been designed by utilizing the excellent tunable optical properties of graphene.The effects of graphene chemical potential,polarization angle and size on the absorber absorption performance were systematically investigated,and the electric field pattern at the resonance frequency was analyzed to further explain the principle of absorber absorption.The results show that the absorber has an absorption rate of 99.98% and 99.99% at 6.363 and 8.987,respectively.The absorption peak position of the absorber can be effectively adjusted by changing the chemical potential of graphene,and the peak absorption rate can reach more than the peak absorption rate at any polarization angle in the range of 0°~80°.The thickness of the SiO2 dielectric layer has almost no effect on the resonance peak position of this absorber,but it has some effect on the peak absorption rate,which increases and then decreases with the gradual increase of the thickness,and perfect absorption is achieved near the thickness of 3.1 μm.The high absorption rate of this absorber stems mainly from the electromagnetic resonance effect. Reference | Related Articles | Metrics | Comments（0）

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Sentiment Analysis Model of Specific Target Text Based on Convolutional Neural Network YE Haiyan Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 24-29.   DOI: 10.13438/j.cnki.jdzk.2024.01.005 Abstract （220）      PDF（pc） （741KB）（319）       Knowledge map    Save In the process of emotion analysis of specific target text,text sequence classification is limited by the labeling method,resulting in low accuracy and recall of analysis results,so a model of emotion analysis of specific target text based on convolution neural network is constructed.Specific target text sequences are analysed based on emotional differences,and the text feature matrix is used as input data to construct a convolutional neural network language model in the input layer,concatenating it into a part of speech sequence matrix.Segmented pooling captures different key features of text sequences and classifies and processes the extracted feature vectors.A dropout mechanism is added to complete sentiment classification of specific target texts,determine the importance information of each word in the text,and achieve sentiment analysis of specific target texts.The experimental results show that the accuracy of the model is higher than 84%,and the maximum recall rate is 87%,which can effectively achieve the emotional analysis of specific target text. Reference | Related Articles | Metrics | Comments（0）

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Spontaneous Emission of Atoms in Double-Column Structure Based on Quasi-Normal Mode Theory CHEN Xuanren, SHAN Xinyu, YANG Hong Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 67-74.   DOI: 10.13438/j.cnki.jdzk.2023.06.011 Abstract （246）      PDF（pc） （1458KB）（317）       Knowledge map    Save Based on the quasi-normal mode (QNM) theory,in the local photoresponse model,fluid dynamics model and generalized non-local photoresponse model of free electrons in metals,the spontaneous emission enhancement characteristics of two-level atoms in the nano-column structure are studied.With efficient coupled QNM theory,the effects of quantum dot position and double-column gap distance on the enhancement properties of spontaneous emission are investigated.The results show that compared with the full-wave method,the quasi-canonical mode method can efficiently and accurately calculate the enhanced characteristics of spontaneous emission,and the nanopillar gap has an important influence on the resonance frequency of the quasi-canonical mode.These studies have important guiding significance for understanding the nanoscale dimer structure to enhance light-matter interaction. Reference | Related Articles | Metrics | Comments（0）

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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 （528）      PDF（pc） （934KB）（312）       Knowledge map    Save 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. Reference | Related Articles | Metrics | Comments（0）

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Existence and Uniqueness of Positive Solutions for a Class of nth Order m Point Boundary Value Problem HU Huashu, GU Chuanyun Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 1-6.   DOI: 10.13438/j.cnki.jdzk.2024.01.001 Abstract （165）      PDF（pc） （301KB）（306）       Knowledge map    Save The existence and uniqueness of positive solutions for a class of nth order m point boundary value problem is studied by using the mixed monotone operators and fixed-point theorem;moreover an iterative sequence is constructed to approximate this positive solution. Reference | Related Articles | Metrics | Comments（0）

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Well-Posedness of Generalized Stochastic Navier-Stokes Equation with Navier Boundary Condition XUE Yuanyuan, JIANG Shan Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 13-18.   DOI: 10.13438/j.cnki.jdzk.2024.01.003 Abstract （221）      PDF（pc） （309KB）（299）       Knowledge map    Save For the generalized stochastic Navier-Stokes equations with Navier boundary condition,we prove a priori estimates for the Navier-Stokes equations in L2 and L4.And then,we prove the monotonicity of nonlinear terms.At last by using Minty-Browder we get the global existence and uniqueness for the weak solution of the stochastic equation. Reference | Related Articles | Metrics | Comments（0）

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Manipulation of the Band Structure of Weyl Semimetals by Electric and Magnetic Fields LUO Shuzhen, LIAO Wenhu, BAO Hairui Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 80-89.   DOI: 10.13438/j.cnki.jdzk.2023.06.013 Abstract （266）      PDF（pc） （3303KB）（297）       Knowledge map    Save Based on the low-energy effective hamiltonian model under the tight-binding approximation,the modulation of the electronic band structure of weyl semimetals by applied electric and/or magnetic fields is investigated.The results show that:when only the positive (negative) electric field is applied,the weyl points of system gradually move towards the boundary (center) of the brillouin zone with the increasing of the electric field strength,and when the electric field strength increases to a certain extent,the semimetal-semiconductor (insulator) transition can be relieazed;when only the magnetic field is applied,the weyl semimetal can form the discrete landau levels,the n=0 subband does not change with the increasing of magnetic length while the n≠0 subband gradually approaches the fermi level with the increasing of magnetic length,and the band gap between the conduction and valence bands with same indices gradually decrease;when the magnetic length remains unchanged,the weyl points of system gradually move towards the boundary (center) of the brillouin zone with the increasing of the positive (negative) electric field strength.Under the appropriate electric field,the n=0 subband can change from partially occupied valence band to first conduction band (fully occupied first valence band) and realize the semimetal-semiconductor or semimetal-insulator transitions. Reference | Related Articles | Metrics | Comments（0）

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Spatial Distribution Characteristics of the Scenic-Reliant Rural Guest Houses and the Influencing Factors：A Case Study of the Three Tourist  Villages in Wulingyuan District XIE Wenhai, YU Zhuoxuan, XU Yiqi, ZHANG Xuan, PENG Junrui, WU Jilin Journal of Jishou University(Natural Sciences Edition)    2023, 44 (5): 77-84.   DOI: 10.13438/j.cnki.jdzk.2023.05.011 Abstract （506）      PDF（pc） （1873KB）（294）       Knowledge map    Save Three representative scenic-reliant villages  in Wulingyuan District were selected as the research samples,and the method of Participatory Rural Appraisal combined with GIS spatial analysis was used to study the spatial distribution characteristics of the guest houses and the influencing factors in the study area.The results indicate that the spatial distribution of the guest houses forms a clustering pattern,which differs significantly from the random distribution pattern and has varying degrees of clustering.The spatial distribution of guest houses forms a hierarchical agglomeration pattern,presenting a spatial form of multi center distribution.The guest houses are mainly located in scenic areas with abundant tourism resources and near the main roads in the village.There are diverse influencing factors for the spatial distribution of the guest houses.Tourism resources,transportation conditions,product orientation and policy support are important for the location and spatial distribution of rural guest houses. Reference | Related Articles | Metrics | Comments（0）

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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 （337）      PDF（pc） （279KB）（290）       Knowledge map    Save 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. Reference | Related Articles | Metrics | Comments（0）

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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 （432）      PDF（pc） （830KB）（290）       Knowledge map    Save 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. Reference | Related Articles | Metrics | Comments（0）

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Distributed Database Index Query Optimization Method Based on Consistent Hash Algorithm LIU Xiaomei, DONG Zhongbo Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 36-41.   DOI: 10.13438/j.cnki.jdzk.2024.01.007 Abstract （280）      PDF（pc） （703KB）（290）       Knowledge map    Save In order to solve the problem of imbalanced load in distributed database index queries,a distributed database index query optimization method is designed based on consistent hashing algorithm.Based on the CPU processing capacity,bandwidth,and cache size of distributed database server nodes,a dynamic feedback mechanism is used to calculate the index query load rate of each server node.A consistent hash load balancing algorithm is used to allocate tasks to each server node and adjust the load in real time.Multiple ant colony algorithms is used to find the optimal query path with the goal of minimizing the total cost.The experimental results show that the optimization method based on consistent hashing algorithm is stable and can reduce the load balancing degree to 1.5% when the number of user requests is 4 000,with a full response time of less than 35 ms.This indicates that this method can effectively adjust the load distribution of distributed databases,is less affected by database size,and has strong query response capabilities. Reference | Related Articles | Metrics | Comments（0）

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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 （451）      PDF（pc） （2024KB）（288）       Knowledge map    Save 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. Reference | Related Articles | Metrics | Comments（0）

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Huajiang Dry-Hot Valley in Central Guizhou Province:Crrent Knowledge and Prespectives JIA Xinglian, WEI Changsheng, YU Yanghua Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 56-62.   DOI: 10.13438/j.cnki.jdzk.2024.02.008 Abstract （184）      PDF（pc） （7279KB）（284）       Knowledge map    Save Situated in central Guizhou Province,China,the Huajiang karst dry-hot valley exhibits a distinctive degree of karst desertification and possesses a relatively fragile habitat.This area's natural environment,ecological industries,and socio-economic factors have drawn considerable scholarly attention.Over the course of nearly 30 years,since the initiation of the "Ninth Five-Year Plan",significant research has been conducted within this region.This research has focused on understanding and controlling karst desertification,enhancing the quality and efficiency of ecological industries,and fostering the coupled development of ecology and economy.Such endeavours have yielded essential theoretical and practical results,aiding in the management of karst desertification and the ecological construction of mountainous regions.This paper delineates the area's fundamental characteristics from four aspects:aridity,high temperatures,valleys,and karst desertification,thereby enriching our understanding of the current habitat situation.Following this,we review the key literature concerning the understanding of karstification and control,cultivation of ecological industries,and improvement in quality and efficiency of these industries from a holistic perspective.Moreover,we utilise long-term cumulative data to analyse areas meriting further investigation.Lastly,based on a regional scale,we suggest future research prospects in three dimensions:quantification and application of micro-habitat characteristics,the interrelationship between vegetation restoration and dual structures,and realisation of the ecological value of ecological products. Reference | Related Articles | Metrics | Comments（0）

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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 （463）      PDF（pc） （744KB）（278）       Knowledge map    Save 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. Reference | Related Articles | Metrics | Comments（0）

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Anti-Attack Defense Algorithm of Small Sample Database Based on Potential Data Mining CAO Qing Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 30-35.   DOI: 10.13438/j.cnki.jdzk.2024.01.006 Abstract （184）      PDF（pc） （656KB）（277）       Knowledge map    Save In order to reduce the deception rate of small sample databases and improve the attack defense effectiveness of small sample databases,a small sample database adversarial attack defense algorithm based on latent data mining was designed.With the improved Apriori algorithm,accurate strong association rule advantages are obtained through the working process of frequent attribute value sets,and potential data is mined from small sample databases to resist attacks,with the process of finding frequent sets from candidate sets optimized.On this basis,adversarial attacks are detected through association analysis,and the access rate is controlled through credibility scheduling to defend against malicious sessions,achieving defense against small sample database adversarial attacks.The experimental results show that defense algorithms for potential data mining can effectively defend against various types of attacks on small sample databases,reduce the database spoofing rate caused by attacks,and thus ensure the stability of server utilization in small sample databases. Reference | Related Articles | Metrics | Comments（0）

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Determination of Seven Volatile Components in Xiangxi Aromatic Vinegar by GC-MS RAO Qingqing Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 61-65.   DOI: 10.13438/j.cnki.jdzk.2024.01.011 Abstract （199）      PDF（pc） （464KB）（275）       Knowledge map    Save The Xiangxi aromatic vinegar were pretreatmented by SDE,and the content of  ethyl acetate,ethanol,ethyl lactate,2,3-butanedione,3-hydroxyl-2-butanone,furfural and 2,3-butanediol was determinated by GC-MS.HP-INNOWAX capillary gas chromatographic column and GC-MS-HS were used.The sample inlet temperature was 220 ℃,the split ratio was 40∶1,the fourth stage rod temperature was 230 ℃,the ion source temperature was 230 ℃,and SIM mode was used.The results showed that linear relationship was between 0.991 and 0.999,and the method repeatability  was less than 10%,which indicates that this method can be used for the determination of volatile components in Xiangxi aromatic vinegar. Reference | Related Articles | Metrics | Comments（0）

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Spontaneous Radiation Dynamics of Three-Level Atoms Near Silver Nanospheres LI Yun, GAO Guangbo, SHAN Xinyu, HUANG Yonggang Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 50-58.   DOI: 10.13438/j.cnki.jdzk.2023.06.009 Abstract （200）      PDF（pc） （2238KB）（273）       Knowledge map    Save Based on the method of Green's function presolvation operator,the spontaneous radiation dynamics of V-type three-level atoms near silver nanospheres are studied.The effects of atomic transition frequency and atomic distance on the surface of the nanosphere on the spontaneous radiation dynamics are investigated systematically.The results show that when the transition frequency of the atom is far away from the resonant frequency of the isoplasmon,the evolution spectrum of the atom is half high and narrow,the dynamic oscillation is enhanced,and the decay rate is slow with time.When the two transition frequencies are close to the formant frequency,the kinetic oscillation of the atom is weakened,and the attenuation rate is faster with time.The distance between the atom and the surface of the nanosphere plays an important role in the coherent oscillation.The closer the distance,the stronger the coherent oscillation;and the farther the distance,the weaker the coherent oscillation. Reference | Related Articles | Metrics | Comments（0）

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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 （415）      PDF（pc） （909KB）（272）       Knowledge map    Save 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. Reference | Related Articles | Metrics | Comments（0）

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Research on the Effect Evaluation of Integrating Revolutionary Culture into Tourism Management Graduate Education based on Entropy-Fuzzy Comprehensive Evaluation Method WANG Zhaofeng, WU Yinfeng Journal of Jishou University(Natural Sciences Edition)    2023, 44 (4): 83-90.   DOI: 10.13438/j.cnki.jdzk.2023.04.010 Abstract （408）      PDF（pc） （700KB）（268）       Knowledge map    Save Taking tourism management graduate students of colleges and universities as the research object,this research uses entropy method and fuzzy comprehensive evaluation method to evaluate the effect of integrating revolutionary culture into tourism management graduate education.The results showed that 25.89% of the teachers and students think the effect  is very good,41.92% of the teachers and students think the effect is good,32.19% of the teachers and students think the effect is not good.Therefore,to improve  the effect of integrating revolutionary culture into tourism management graduate education,it is necessary to optimize the tourism management graduate student education program,incorporate revolutionary culture into coursebook,class,and ideology,innovate and optimizate tourism management graduate student education content and form,and promote  the "three whole education" system.At the same time,it is necessary to strengthen the construction of tourism management disciplines and professional teachers to promote the high-quality development of tourism management personnel training. Reference | Related Articles | Metrics | Comments（0）

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Acoustic Radiation Force of Microbubbles Within Microcavities TIAN Zhen, KONG Peng, DENG Ke Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 28-31.   DOI: 10.13438/j.cnki.jdzk.2023.06.005 Abstract （188）      PDF（pc） （1829KB）（266）       Knowledge map    Save The trapping mechanism of microbubbles is analyzed based on microbubble acoustic radiation force theory and numerical simulation,and the acoustic radiation force of microbubbles in microcavities is studied.The theoretical analysis showed that when the driving frequency of the sound field is lower than the resonant frequency of the microbubble,the force direction of the microbubble points to the maximum value of the sound field.When the driving frequency of the sound field is higher than the resonant frequency of the microbubble,the force direction of the microbubble points to the minimum value of the sound field.Combined with finite element simulation of the quartz cavity,it is verified that the resonance properties exhibited by microbubbles of different sizes in the same acoustic field are different.Smaller microbubbles move towards the acoustic field minimum under the action of standing waves,while larger microbubbles move in the opposite direction. Reference | Related Articles | Metrics | Comments（0）

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Existence of Positive Solutions to Two-Point Boundary Value Problems of Fractional Differentional Equations Involving Caputo-Fabrizio Fractional Derivatives WANG Lanfang Journal of Jishou University(Natural Sciences Edition)    2023, 44 (5): 1-5.   DOI: 10.13438/j.cnki.jdzk.2023.05.001 Abstract （277）      PDF（pc） （279KB）（261）       Knowledge map    Save Based on the Krasnoselskii fixed point theorem，existence of positive solutions to two-point boundary value problems for fractional differential equations involving the Caputo-Fabrizio derivative is discussed，and some sufficient conditions are established to ensure the existence of at least one positive solutions to the boundary problem. Reference | Related Articles | Metrics | Comments（0）

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Resonant Casimir-Polder Force Properties of Atoms in the Vicinity of a Convex Structure GAO Guangbo, SHAN Xinyu, ZHAO Jinyun, HUANG Yonggang Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 59-66.   DOI: 10.13438/j.cnki.jdzk.2023.06.010 Abstract （170）      PDF（pc） （1353KB）（257）       Knowledge map    Save The influence of the transition frequency and position of a two-level atom in the vicinity the convex structure on the resonant casimir-polder force is studied by using COMSOL Multiphysics software.The results show that compared with the cross-sectional silver nanospheres,the convex structure produces a new surface plasmon resonance mode,which greatly enhances the resonance casimir-polder force on the atom.In addition,when the atom is close to the surface of the convex structure,the new resonance mode plays a leading role in the regulation of the resonant casimir-polder force,and the contribution of the new resonant mode to the resonant casimir-polder force decreases sharply with the increase of the distance.and the contribution of the resonance mode produced by the bulge is faster than that produced by the cross-section silver nanospheres. Reference | Related Articles | Metrics | Comments（0）

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Design of Ultrathin Transmissive Acoustic Cloak SUI Yumei, KONG Peng, DENG Ke, ZHAO Heping Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 32-36.   DOI: 10.13438/j.cnki.jdzk.2023.06.006 Abstract （245）      PDF（pc） （2319KB）（255）       Knowledge map    Save Acoustically transmissive cloak is constructed with a combination of two labyrinthine type metasurfaces-phase-modulated metasurface and near-zero refractive index metasurface.The near-zero refractive index metasurface is verified by energy band calculation and equivalent medium theory to have zero refractive index property similar to phonon crystals,so that it can guide the acoustic waves to continue to go around the obstacles in the original direction of the acoustic waves;the phase-modulated metasurface,on the other hand,should have a high transmittance while having the role of phase-modulation to ensure that the acoustic waves can pass through in large quantities.The simulations and calculations show that the acoustic transmission cloak formed by the construction works well. Reference | Related Articles | Metrics | Comments（0）

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Design of Pixel Compensation Algorithm for Video Image Based on Local Convolution ZHA Huaizhi Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 1-8.   DOI: 10.13438/j.cnki.jdzk.2023.06.001 Abstract （209）      PDF（pc） （3962KB）（253）       Knowledge map    Save A video image pixel compensation method based on local convolution (local convolution compensation) is proposed to repair missing pixels in high-speed moving targets.The method introduces local convolution to segment the neural network model and reconstruct video image frames.It activates the source video image and its corresponding pixel space,applies linear mean compensation to fill the interpolated frame holes in the video image,and evaluates the matching degree of the video image to complete the pixel compensation.Comparative experimental results show that the average gradient of the local convolution compensation method is 11.239,significantly higher than the other three comparative methods,which indicates that the video image after compensation using the local convolution method has higher clarity. Reference | Related Articles | Metrics | Comments（0）

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Effect of Ginger Starch on the Characteristics of Ginger Powder XIONG Kun, SHUAI Jingjing Journal of Jishou University(Natural Sciences Edition)    2024, 45 (3): 45-54.   DOI: 10.13438/j.cnki.jdzk.2024.03.007 Abstract （131）      PDF（pc） （948KB）（253）       Knowledge map    Save With fresh ginger as raw material,the original ginger juice,precipitation and supernatant were separated after juicing,and freeze-dried ginger powder 1,2,3 were obtained respectively,and then their dispersibility,solubility,sensory characteristics,volatile components were measured.The results showed that the starch retention rates of three kinds of ginger powder were ginger powder 2,ginger powder 1 and ginger powder 3 in descending order.The color of ginger powder 2 was the brightest and L* was the largest,but the solubility of ginger powder 3 was significantly better than the other two.The sensory comprehensive evaluation showed no significant differences in  ginger powder 3 and ginger powder 1,but better sensory scores than that of ginger powder 2.A total of 103 volatile components were identified,including 54 olefins,20 alcohols,11 aldehydes,7 ketones and 11 esters.Olefins,alcohols and ketones were the main volatile components in ginger powder,and their relative contents were 67.33%,14.67% and 13.67%,respectively.20 volatile components with VIP higher than 1 had the greatest effect on the flavor of the three ginger powder.Cluster analysis showed that the three kinds of ginger powder could be clustered into categories I and Ⅱ.Ginger powder 1 and ginger powder 3 had similar flavors,so they were classified as class I.The two euclidean distance was 0.342 0,the euclidean distance difference between class Ⅱ and class I was only 0.011 0,indicating that the difference between class II and class I was  not significant. Reference | Related Articles | Metrics | Comments（0）

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Properties of Equivalent Sequences and Applications XU Beining, XU Shaoyuan Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 18-23.   DOI: 10.13438/j.cnki.jdzk.2024.02.003 Abstract （207）      PDF（pc） （353KB）（252）       Knowledge map    Save This article introduces the equivalence relationship in set theory into mathematical analysis,proposes the concept of equivalent sequence,obtains several properties of equivalent sequence,and provides examples to illustrate the applications of equivalent sequences in mathematical analysis,linear algebra,and functional analysis. Reference | Related Articles | Metrics | Comments（0）

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Relaxed Farkas Lemma for the Sum Optimization Problems ZENG Zhaohui, WANG Junying, WANG Xianyun Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 1-8.   DOI: 10.13438/j.cnki.jdzk.2024.02.001 Abstract （120）      PDF（pc） （295KB）（249）       Knowledge map    Save By using the properties of the epigraph of the conjugate functions and introducing two new constraint qualifications,the relaxed Farkas lemmas of the sum optimization problems are established. Reference | Related Articles | Metrics | Comments（0）

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Disciplinary Features of Interpersonal Themes in English Academic Texts and the Motivating Disciplinary Contextual Factors SHI Lin Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 84-91.   DOI: 10.13438/j.cnki.jdzk.2024.01.014 Abstract （173）      PDF（pc） （410KB）（246）       Knowledge map    Save Interpersonal themes in disciplinary texts of physics,chemistry,environmental engineering,sociology,linguistics,history and literature are investigated in terms of semantics and lexico-grammar.It is found that the disciplinary texts share some commonalities and at the same time,demonstrate some disciplinary features;Choices in interpersonal themes are influenced by the disciplinary contextual factors,including research objects,knowledge development,research process and method,relationship between practitioners and knowledge,and forms of research results and products. Reference | Related Articles | Metrics | Comments（0）

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Multi-Attribute Group Decision Making Algorithm of Weighted Hesitant Fuzzy Set and Its Application ZHU Guocheng Journal of Jishou University(Natural Sciences Edition)    2023, 44 (4): 9-18.   DOI: 10.13438/j.cnki.jdzk.2023.04.002 Abstract （390）      PDF（pc） （436KB）（244）       Knowledge map    Save In order to describe the multi-attribute group decision information of hesitant fuzzy set more comprehensively,the weighted hesitant fuzzy set is defined by adding the associated comprehensive weight of decision expert to the membership degree of hesitant fuzzy set.On the basis of using weighted hesitant fuzzy set to describe decision information,two algorithms for sorting alternative solutions based on single attribute view are established.Finally,the feasibility of the two algorithms are verified by a concrete case.The results show that the two algorithms are easy to operate and calculate,and can be converted into each other. Reference | Related Articles | Metrics | Comments（0）

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D-N Alternating Method Based on the Curved Edge Finite Element for Anisotropic Exterior Problems in a Concave Angle TU Mingyue Journal of Jishou University(Natural Sciences Edition)    2023, 44 (4): 31-38.   DOI: 10.13438/j.cnki.jdzk.2023.04.004 Abstract （315）      PDF（pc） （374KB）（243）       Knowledge map    Save Based on the natural boundary element theory of curved edge finite element,a D-N alternating method with curved edge finite element is established to solve anisotropic elliptic exterior problem in the infinite domain with a concave angle,and to give the error estimation and convergence of the approximate solution of the D-N alternating method. Reference | Related Articles | Metrics | Comments（0）