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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 （767）      PDF（pc） （1094KB）（439）       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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Current Situation and Measures of Drum Dance Development of Miao Ethnic Group in Western Hunan Province:Activation and  Inheritance of Intangible Cultural Heritage XIA Chenchen Journal of Jishou University(Natural Sciences Edition)    2022, 43 (6): 92-96.   DOI: 10.13438/j.cnki.jdzk.2022.06.016 Abstract （733）      PDF（pc） （433KB）（323）       Knowledge map    Save Drum dance of Miao ethnic group in western Hunan province is a national-level intangible cultural heritage with representative inheritors at the national,provincial,state,county and municipal levels.The project has been well protected,and has been well applied in ethnic and folk cultural and sports activities,school sports,tourism development and foreign cultural exchanges.However,there are still serious problems such as the aging of inheritors,the imperfect inheritance mechanism,and the challenges from modern entertainment.In order to improve the protection and inheritance effect of the drum dance,some measures need to be taken,such as cultivation of inheritors,creating demonstration area of "two innovation",and diversified and coordinated development. Reference | Related Articles | Metrics | Comments（0）

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Study on the Mechanism of Lily in the Treatment of Cognitive Impairment Based on Network Pharmacology and Molecular Docking LIU Ye, FU Chuanjun, LIU Na, LI Xianhui, LIU Xihan Journal of Jishou University(Natural Sciences Edition)    2022, 43 (5): 74-82.   DOI: 10.13438/j.cnki.jdzk.2022.05.012 Abstract （444）      PDF（pc） （8180KB）（322）       Knowledge map    Save The mechanism of lily in the treatment of cognitive impairment was studied based on network pharmacology and molecular docking.The main active components and action targets of lily were obtained from TCMSP database.After screening,7 main active components were obtained.There were 465 potential action targets of the main active components of lily.Secondly,disease targets were obtained from GeneCards,OMIM,PharmGKB,DrugBank and CTD databases,and the intersection of lily chemical components and cognitive impairment targets was obtained by using Venny software.44 drug component-disease intersection targets were obtained.Using STRING database,the intersection target protein interaction (PPI) network was constructed.After screening,the core targets and core components were obtained.It was found that MAOB (monoamine oxidase B),CASP3 caspase 3),ESR1 (estrogen receptor),JUN (gene of chromosome 1),CASP8 (aspartic acid proteolytic enzyme 8),CASP9 (aspartic acid proteolytic enzyme 9),PGR (steroid receptor gene),AR (adrenergic receptor),SLC6A3 (dopamine transporter gene),PTGS2 (cyclooxygenase-2) were the key target proteins of lily pharmacodynamic components for the anti cognitive impairment effect.Metascape and DAVID platforms were used for GO function enrichment and KEGG pathway enrichment analysis,and Autodock Vina platform was used for molecular docking.The results showed that 4 active compounds of lily were related to 10 key core targets of cognitive impairment,and there were 30 key signal pathways involved in the regulation.Among them,stigmasterol,3-norcolchicine,β-Sitosterol,and rosin acid had high degree value.The target proteins with high degree value included MAOB,PTGS2,CASP3,CASP9,etc.The main pathways involved were neural activity ligand receptor interaction pathway,calcium signaling pathway,small cell lung cancer pathway and so on.The mechanism of lily in treating cognitive impairment may improve cognitive function by inhibiting the activity of monoamine oxidase B. Reference | Related Articles | Metrics | Comments（0）

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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 （681）      PDF（pc） （437KB）（313）       Knowledge map    Save 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. Reference | Related Articles | Metrics | Comments（0）

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Study on Plant Resources of Military Materia Medica in Western Hunan (Ⅳ):Investigation and Analysis of Poisonous Plant Resources XIAO Meiqi, LI Zhen, LI Zhenhui, ZHANG Yangyang, XIANG Xiaomei, CHEN Gongxi Journal of Jishou University(Natural Sciences Edition)    2022, 43 (5): 20-29.   DOI: 10.13438/j.cnki.jdzk.2022.05.004 Abstract （444）      PDF（pc） （903KB）（273）       Knowledge map    Save In order to enrich the military herbal resource database in western Hunan,and better develop and utilize the materia medica resources for military purposes,the toxic plant resources of military materia medica in Xiangxi Autonomous Prefecture,Zhangjiajie City and its surrounding areas were statistically analyzed through field investigation and literature review.The results show that there are 203 species,belonging to 136 genera and 67 families of poisonous plants in Western Hunan;life habits are mainly of perennial herbs.The habitat is dominated by forest.As for the distribution,the number of poisonous plants increases first and then decreases with the increase of elevation.In the horizontal distribution,the abundance of poisonous plants in the northwest of Hunan is higher than that in the south.The differentiation of geographical elements from the family level to the genus level and then to the species level has gradually become larger.At the family level,most of the poisonous plants in western Hunan can be found around the world;at the genus level,most of them are distributed in the north temperate zone;at the species level,the dominant species are of east Asian species (endemically distributed in China).The majority of toxic plants are of whole-part toxic plants with small toxicity.The toxicological effects are mainly nervous system toxicity and mucosal irritation toxicity. Reference | Related Articles | Metrics | Comments（0）

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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 （199）      PDF（pc） （470KB）（265）       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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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 （321）      PDF（pc） （3959KB）（255）       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 （330）      PDF（pc） （10002KB）（251）       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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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 （170）      PDF（pc） （1442KB）（249）       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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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 （281）      PDF（pc） （2738KB）（234）       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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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 （424）      PDF（pc） （934KB）（232）       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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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 （304）      PDF（pc） （1054KB）（221）       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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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 （129）      PDF（pc） （741KB）（220）       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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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 （262）      PDF（pc） （279KB）（220）       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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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 （563）      PDF（pc） （483KB）（213）       Knowledge map    Save 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. 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 （98）      PDF（pc） （8763KB）（208）       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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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 （256）      PDF（pc） （374KB）（202）       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）

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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 （144）      PDF（pc） （3283KB）（201）       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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Studies on Military Materia Medica Resources in Western Hunan,China (Ⅲ):Investigation and Analysis of Plant Resources for Treating Snake and Insects Injury LI Zhen, XIAO Meiqi, LI Zhenghui, ZHANG Yangyang, XIANG Xiaomei, CHEN Gongxi Journal of Jishou University(Natural Sciences Edition)    2022, 43 (5): 1-9.   DOI: 10.13438/j.cnki.jdzk.2022.05.001 Abstract （424）      PDF（pc） （902KB）（201）       Knowledge map    Save In order to understand the plant resources for treating snake and insect injuries in western Hunan,the resource library for military mateira medica is constructed.Field sampling survey and literature review were used to comprehensively analyze the military herbal resources of treating snake and insect injuries in western Hunan.The results show that there are 284 species of plants for treating snake and insect injuries in western Hunan,affiliated to 207 genera in 94 families.Living habits are mainly herbaceous,while the habitat is dominated by the forest.Distributed horizontally,plants are more abundant in the northern area than in the southern area.Vertically,species show a trend to increase first and then decrease with the increase of elevation.Among them,military herbs are the most distributed in the altitude range of 600 to 1 299 m.Regional geographical composition is complex and diverse.The families are dominated by a worldwide and pan-tropical distribution,and the genus is dominated by pan-tropical distribution and northern temperate distribution.Species are mainly distributed in East Asia,endemic to China and tropical Asia.The majority are of whole-part medicinal plants for variety of uses,with the right amount of fresh products mashed for the affected place or with right amount of decoction.At present,western Hunan province is rich in the plant resources for the treatment of snake and insect injuries,but the development and utilization is not appropriate,so the development and research should be strengthened for sustainable utilization. Reference | Related Articles | Metrics | Comments（0）

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Improved of Source Code Plagiarism Detection Based on Abstract Syntax Tree LIU Feixiang, LONG Dongdong, OU Xingru, CHEN Changfeng Journal of Jishou University(Natural Sciences Edition)    2022, 43 (6): 20-25.   DOI: 10.13438/j.cnki.jdzk.2022.06.005 Abstract （571）      PDF（pc） （371KB）（200）       Knowledge map    Save For low detection accuracy and inability to detect plagiarism at the semantic level in the traditional abstract syntax tree based code plagiarism detection methods,an improved code plagiarism detection approach based on abstract syntax tree is designed.This approach achieves higher plagiarism detection rate through TF-IDF weighted simplified syntax tree.Moreover,feature extraction and similarity calculation methods based on weighted simplified abstract syntax tree are designed to realize partial detection of semantic plagiarism.Experimental results show that the proposed approach can effectively detect semantic level plagiarism and achieves higher accuracy than traditional tree-based methods. Reference | Related Articles | Metrics | Comments（0）

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Design and Optimization of Permission Control System with Distributed Architecture LEI Yunxiang, JIANG Qihai, TIAN Jie, DUAN Mingxiu Journal of Jishou University(Natural Sciences Edition)    2022, 43 (6): 26-31.   DOI: 10.13438/j.cnki.jdzk.2022.06.006 Abstract （460）      PDF（pc） （1010KB）（200）       Knowledge map    Save Aiming at the low performance and difficult maintenance of traditional permission control system,a new distributed permission management system based on JSON Web Token(JWT) technology is designed and implemented.The system adopts the mode of "centralized authentication and decentralized identification",which improves the overall performance and efficiency of the system. Reference | Related Articles | Metrics | Comments（0）

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Proof of Gracefulness of Crowns of Two Kinds of Graceful Graphs TANG Baoxiang, REN Han Journal of Jishou University(Natural Sciences Edition)    2022, 43 (6): 1-5.   DOI: 10.13438/j.cnki.jdzk.2022.06.001 Abstract （395）      PDF（pc） （425KB）（198）       Knowledge map    Save This paper uses the construction method to give the graceful labels of the crowns I(Tn) and I(1-∧C4,n) of the graceful graphs Tn and 1-∧C4,n,thus proving that both I(Tn) and I(1-∧C4,n) are graceful graphs. Reference | Related Articles | Metrics | Comments（0）

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Journal of Jishou University(Natural Sciences Edition)    2023, 44 (2): 96-96.   Abstract （160）      PDF（pc） （146KB）（198）       Knowledge map    Save 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 （285）      PDF（pc） （700KB）（196）       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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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 （134）      PDF（pc） （1458KB）（193）       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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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 （530）      PDF（pc） （4395KB）（193）       Knowledge map    Save 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. 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 （114）      PDF（pc） （301KB）（190）       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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Comprehensive Evaluation and Spatial Distribution Characteristics of Soil Fertility in Xiangxi Prefecture PENG Huan, ZHOU Ying, ZENG Hanyong, LUO Jin, LI Qiang, HE Jianwu Journal of Jishou University(Natural Sciences Edition)    2022, 43 (6): 38-44.   DOI: 10.13438/j.cnki.jdzk.2022.06.008 Abstract （485）      PDF（pc） （12300KB）（189）       Knowledge map    Save The comprehensive evaluation of soil fertility in Xiangxi autonomous Prefecture provides a basis for improving soil fertility and building high-quality farmland.Soil pH,organic matter,total nitrogen,available phosphorus,and available potassium were selected as evaluation indicators，combined with the index summation method,a comprehensive evaluation system of soil fertility is constructed,and the soil fertility is comprehensively evaluated.The results showed that the soil pH in Xiangxi Prefecture is acid,there is slight soil acidification,the content of organic matter is high,the content of total nitrogen is moderate,the content of available phosphorus and available potassium vary greatly,and the average content was high.The proportion of soil area with grade I,II,III and IV fertility in Xiangxi Prefecture was 17.66%,17.62%,8.21% and 56.51% respectively. Reference | Related Articles | Metrics | Comments（0）

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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 （327）      PDF（pc） （454KB）（187）       Knowledge map    Save 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. 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 （310）      PDF（pc） （830KB）（187）       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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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 （288）      PDF（pc） （436KB）（187）       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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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 （333）      PDF（pc） （323KB）（185）       Knowledge map    Save 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. 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 （347）      PDF（pc） （2024KB）（185）       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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Method for Solving the Abel Integral Equation of the Downline Problem XING Jiasheng Journal of Jishou University(Natural Sciences Edition)    2022, 43 (6): 6-10.   DOI: 10.13438/j.cnki.jdzk.2022.06.002 Abstract （558）      PDF（pc） （326KB）（182）       Knowledge map    Save For the solution of the downline problem with a given descent time function，the problem is transformed into an Abel integral equation solution problem.For the integral equation on infinite interval,this paper introduces Abel's method and the process of solving integral equation with Laplace transformation,and gives the solution formula.For the limited range of integral equation,this paper uses the Abel integral transformation method to solve the integral equation,uses the iterated integral to exchange integral sequence,and obtains the solution formula from a definite integral identity.The solution formula of the integral equation is applied to the isochronous curve problem.The isochron is proved be an inverted cycloid with the solution of  the differential equation of the isochronous curve problem. Reference | Related Articles | Metrics | Comments（0）

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Analysis of the Coagulant Activity and Chemical Components in Artemisia annua L. ZHAO Fafa, ZHANG Xiaorong Journal of Jishou University(Natural Sciences Edition)    2022, 43 (5): 30-36.   DOI: 10.13438/j.cnki.jdzk.2022.05.005 Abstract （603）      PDF（pc） （2305KB）（182）       Knowledge map    Save The pharmacodynamics substance in Artemisia annua L.was studied.The hemostasis chemical compositions were extracted by the organic solvent extraction method in Artemisia annua L..The hemostasis medicinal effect of the extract from Artemisia annua L.was detected using the coagulation plate method,the test tube method and the plasma recalcification time measurement method.The flavone compounds were separated from the butyl alcohol extract using Alkali dissolution-acid precipitation method.The spectroscopic properties were detected by the ultraviolet-visible spectroscopy and the fluorescence spectroscopy.And the flavone compounds were identified of the physical and chemical properties.The terpenoids compounds were separated from the butyl alcohol extract by the low temperature method,and were analyzed using the thin layer chromatography (TLC).The results indicated that the butyl alcohol extract was the hemostasis pharmacodynamics substance in Artemisia annua L..The clotting effect was significant of the butyl alcohol extract tested by the three methods of the coagulation plate method,the test tube method and the plasma recalcification time measurement method.And the chemical composition analysis showed that a lot of flavone compounds and the terpenoids compounds were contained in the butyl alcohol extract.It can be concluded that the pharmacodynamics substance is the butyl alcohol extract from Artemisia annua L.,and the major chemical constituents include the flavone compounds and the terpenoids compounds. 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 （162）      PDF（pc） （703KB）（181）       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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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 （139）      PDF（pc） （2319KB）（180）       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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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 （158）      PDF（pc） （3303KB）（179）       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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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 （60）      PDF（pc） （7279KB）（179）       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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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 （129）      PDF（pc） （1829KB）（179）       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）