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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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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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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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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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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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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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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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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 （138）      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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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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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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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）

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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 （104）      PDF（pc） （656KB）（178）       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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Mixed Type Duality for a New Class of Non-Convex Robust Optimization Problems WANG Mengdan, WANG Jiaolang Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 7-12.   DOI: 10.13438/j.cnki.jdzk.2024.01.002 Abstract （112）      PDF（pc） （306KB）（177）       Knowledge map    Save We first introduced a new class of non-convex robust optimization problems,whose objective functions and constraint functions are α-convex functions and defined the mixed-type approximate dual problem of the new problems.Then,by using the properties of the Frechet subdifferentials,the optimality conditions of approximate solution are introduced.At the same time,some results for the weak duality,strong duality and converse-like duality theorems between the non-convex robust optimization problem and its mixed type dual problem are also given. 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 （113）      PDF（pc） （309KB）（174）       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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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 （113）      PDF（pc） （2238KB）（172）       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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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 （266）      PDF（pc） （1873KB）（170）       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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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 （103）      PDF（pc） （464KB）（166）       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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Selective Retention and Controlled Release Behavior of a Temperature-Sensitive Imprinted Polymer Monolith for Diosgenin LIU Meijun, PENG Yuting, XIAO Zhenyi, ZHOU Xiaohui, JIAN Yuxuan, MAO Lin, LI Hui Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 48-55.   DOI: 10.13438/j.cnki.jdzk.2024.01.009 Abstract （101）      PDF（pc） （754KB）（165）       Knowledge map    Save A temperature-sensitive imprinted polymer was prepared with diosgenin as the template and with α-methacrylic acid (MAA) and N-Isopropylacrylamide (NIPAM) as mixed-functional monomer in present work.Then,this imprint polymer was filled into an empty stainless steel tube to produce a molecularly imprinted polymer column and the retention and controlled release behavior for this column toward the template as a drug molecule were evaluated in chromatographic model.The influence of column temperature,effluent composition and pH,and effluent ion strength on the retention selectivity and controlled release behavior for this imprint column was investigated.Results indicated that column temperature possessed significant influence on retention and controlled-release behavior for the imprint column.When it was set at 303 K (near critical temperature of this imprinted polymer),the column had the strongest retention capacity toward the template.Moreover,when column temperature was higher and/or lower than 303 K,a decreased retention capacity and an accelerated template release for the imprint column was observed.In addition,effluent composition,pH and effluent ion strength also affect the retention and controlled-release for this imprint column.At 303 K column temperature and with effluent of  0.001 mol/L (pH 7.4),the release time was as long as 1 050 min. Reference | Related Articles | Metrics | Comments（0）

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Spectrum Sensing Algorithm Based on Joint Detection of Skewness and Kurtosis TAN Zhewen, LEI Kejun, YANG Xi, WANG Xuming, TAN Yuhao Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 14-19.   DOI: 10.13438/j.cnki.jdzk.2023.06.003 Abstract （122）      PDF（pc） （585KB）（165）       Knowledge map    Save By normalizing the sample skewness and kurtosis of the received signal,a spectrum sensing algorithm based on joint detection of skewness and kurtosis (joint detection) is proposed.Utilizing the probability density function of the chi-square distribution,the theoretical false alarm performance of the algorithm is analyzed under non-asymptotic conditions,and the corresponding theoretical decision threshold is derived.In the simulation experiments,joint detection can still guarantee reliable detection results with small number of samples,and shows better detection performance than the classical Jarque-Bera (JB) spectrum sensing algorithm. Reference | Related Articles | Metrics | Comments（0）

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Community Detection Algorithm for Bipartite Networks Based on Spectral Clustering LIU Chenchen, XU Ying Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 9-13.   DOI: 10.13438/j.cnki.jdzk.2023.06.002 Abstract （145）      PDF（pc） （676KB）（163）       Knowledge map    Save In order to solve the problem of low precision and original network information lose in community detection of bipartite network,a new spectral clustering algorithm named SVD-MS is proposed.This method maps Barber's problem of maximizing the module size of bipartite networks to the problem of singular value vector decomposition,and combines heuristic algorithms to quickly solve vector partitioning problems.Experimental results show that,the SVD-MS algorithm can effectively partition the community structure of bipartite networks and preserve the original network information. 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 （127）      PDF（pc） （3962KB）（160）       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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Preparation of Amino-Salicylic Acid Modified Tannin-Based Resin and Its Adsorption Performance of Ag(I)  LI Jialing, HUANG Qianlan, ZHANG Aihua, PENG Zhiyuan Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 42-47.   Abstract （82）      PDF（pc） （843KB）（158）       Knowledge map    Save The chlorinated tannins were prepared by chlorination of Bayberry Tannin  with dichlorosulfoxide,then cross-linked with amino-salicylic acid to synthesize salicylic modified tannins,and then cross-linked with paraformaldehyde to obtain salicylic acid tannin-based resin.FTIR characterized the structure of the tannin-based resin.The effects of solution pH,initial concentration of Ag(I),temperature,and time on the adsorption performance were investigated.The experiments showed that the maximum adsorption of Ag(I) by the resin could reach 239.6 mg/g at the temperature of 318 K,pH of 5.0,and the initial concentration of Ag(I) of 260 mg/L.The adsorption thermodynamics indicated that this material's adsorption process of Ag(I) was in accordance with the Langmuir adsorption isotherm model and the quasi secondary kinetic model.It can be concluded that the amino-salicylic acid modified tannin-based resin has good Ag(I) adsorption performance. 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 （186）      PDF（pc） （279KB）（157）       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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Named Entity Recognition of Diabetes Online Health Community Based on BERT Model LIANG Yujin, FU Chuanshan, CHEN Jinsong, CHEN Ming, ZHOU Yue, XU Qian Journal of Jishou University(Natural Sciences Edition)    2023, 44 (5): 28-34.   DOI: 10.13438/j.cnki.jdzk.2023.05.004 Abstract （203）      PDF（pc） （840KB）（155）       Knowledge map    Save To address the issues of heterogeneous content,high complexity,and inability to recognize contextual semantics in diabetic patient-patient online health communities,the BERT-embedded BiLSTM-CRF model is used to recognize six types of entities from the text of the diabetic community "Sweet Home":disease,clinical manifestation,medicine,test,body parts,and emotion.The results demonstrate that the model achieved an accuracy rate of 90.8%,a recall rate of 76%,and a F1 value of 82.8%.The BERT-BiLSTM-CRF model has been shown to be useful for recognition and to serve as a benchmark for more personalized health information and services. 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 （118）      PDF（pc） （870KB）（155）       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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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 （102）      PDF（pc） （1353KB）（153）       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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Electronic File Uploading Encryption Method Based on Chaotic Sequence XU Debin Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 19-23.   DOI: 10.13438/j.cnki.jdzk.2024.01.004 Abstract （114）      PDF（pc） （883KB）（153）       Knowledge map    Save In order to improve the transmission security of electronic files and the security of user information,a chaotic sequence based encryption method for uploading electronic files is studied.The formal scheme is used to decompose the steps of uploading electronic files,and the form of uploading is defined uniformly in the interactive process.Logistic mapping is used to represent chaotic mode.Given the interval of chaotic sequence,the file encryption key stream is randomly generated.On the premise of ensuring the complete decryption of electronic files,the replacement process is constructed by setting ciphertext replacement rules,adjusting ciphertext order according to reversible relationship,realizing the encryption and uploading of electronic files,and completing the method design.The experiment simulates the whole process of uploading electronic files based on the configuration of optical fiber network.The chaotic sequence method can generate 128 bit encryption key within 10 s and complete 498 groups of electronic files with memory size of 1.5 GB within a specified time. Reference | Related Articles | Metrics | Comments（0）

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Determination of Organic Germanium and Total Germanium Through Automatic Digestion and Fluorescence Spectrometry LIU Bangfu Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 56-60.   DOI: 10.13438/j.cnki.jdzk.2024.01.010 Abstract （101）      PDF（pc） （450KB）（152）       Knowledge map    Save With organic germanium and total germanium as indexes in herbal medicine,and with the property of GeCl4 low boiling point,the organic germanium and inorganic germanium are separated and extracted by fully automated sample digestion system,and determined by atomic fluorescence spectrometry.We found that inorganic germanium could be extracted at 50 ℃,vibrating for 40 min in mass fraction of 1% HNO3.In 6 mol/L HCl heated at 100 ℃ for 60 min,the inorganic germanium and organic germanium can be separated.The LOD of Ge was 0.16 μg/L,the recoveries of germanium was 92.5%～104.0%,and the RSD was 2.01%～3.77%,which accords with the demand of analysis. 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 （99）      PDF（pc） （410KB）（151）       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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Harmonic and Inter-Harmonic Parameter Estimation Algorithm Based on MSLDSMC Window CHEN Qianming, ZHANG Zhiwei, LI Minghao, WANG Xuming, LEI Kejun Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 20-27.   DOI: 10.13438/j.cnki.jdzk.2023.06.004 Abstract （135）      PDF（pc） （3030KB）（150）       Knowledge map    Save The fast Fourier transform (FFT) method may encounter spectral leakage and picket fence effect in harmonic detection,resulting in low accuracy in detecting harmonic and inter-harmonic parameters.To improve the detection accuracy,based on the maximum side lobe decay window (MSLD) with excellent sidelobe characteristics,we have constructe an MSLD self-multiplication-convolution window (MSLDSMC) by multiplication and convolution operations.On this basis we propos a high-precision estimation algorithm for harmonic and inter-harmonic parameters of three spectral line interpolation.Simulation experiments conducted in different complex scenarios verify the accuracy of harmonic and inter-harmonic parameter estimation algorithms based on MSLDSMC window three spectral line interpolation. 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 （60）      PDF（pc） （295KB）（146）       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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Harmonious Coexistence of Ecological Environment and Intangible Cultural Heritage "Maugus" Ritual Culture ZHAO Yalan Journal of Jishou University(Natural Sciences Edition)    2024, 45 (1): 92-96.   DOI: 10.13438/j.cnki.jdzk.2024.01.015 Abstract （91）      PDF（pc） （405KB）（145）       Knowledge map    Save "Maugus" ritual culture is a collective memory of the descendants of the Tujia ethnic group on the history and cultural evolution of the Tujia.It not only artfully reproduces the natural state of the production and life of the Tujia ancestors,but alsos become the best carrier and approach for the protection,inheritance,and development of intangible cultural heritage.In the interaction and restriction between ecological environment and ritual culture,it is appropriate to achieve organic coupling between "Maugus" and human environment by taking ceremony,habitat,heritage,and economy as media,avoiding disadvantages and promoting advantages to achieve living inheritance and to promote the development of ethnic culture and ecotourism industry. 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 （172）      PDF（pc） （6658KB）（141）       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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Energy Functional of Orbital-Free Density Functional Theory for Sodium Metal Slab LIU Runfeng, HU Qihong, ZHOU Fang, CHENG Xiaodi, WANG Xiaoyun, HUANG Yonggang Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 90-96.   DOI: 10.13438/j.cnki.jdzk.2023.06.014 Abstract （103）      PDF（pc） （713KB）（141）       Knowledge map    Save The method of using OF-DFT to study the ground-state density and work function of metal sodium plates was explored.Through extensive numerical experiments,it was determined that a vW kinetic energy functional weight of 0.4 is required to obtain accurate ground-state properties for metal sodium plates,and this kinetic energy functional weight is applicable to different exchange-correlation potentials. Reference | Related Articles | Metrics | Comments（0）

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Stability and Hopf Bifurcation of a Predator-Prey Model with Dual Time-Delay ZHANG Meiyang, XIE Jingli, GUO Hongli Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 9-17.   DOI: 10.13438/j.cnki.jdzk.2024.02.002 Abstract （67）      PDF（pc） （2260KB）（138）       Knowledge map    Save A dual time-delay predator-prey model with B-D functional response and different refuge behaviors is established,and the stability and Hopf bifurcation of the positive equilibrium of the model with different time-delays are analyzed.The research shows that when the time-delay is equal to the corresponding critical value,Hopf bifurcation occurs at the positive equilibrium of the model,and the stability of the positive equilibrium changes. Reference | Related Articles | Metrics | Comments（0）

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Effect of Metal Doping on the Rectification Characteristics of CdTe Nanodevices YANG Jinbiao, LIAO Wenhu, BAO Hairui Journal of Jishou University(Natural Sciences Edition)    2023, 44 (6): 75-79.   DOI: 10.13438/j.cnki.jdzk.2023.06.012 Abstract （100）      PDF（pc） （2326KB）（135）       Knowledge map    Save Based on density functional theory combined with non-equilibrium Green's function,the voltammetric properties of transition metal Cu-Cr,Cu-V and Cu-Ti co-doped CdTe nanoelectronic devices were systematically investigated.The results show that the voltammetric curves of the three different co-doped CdTe nanodevices exhibit diode voltammetric curves and produce strong rectification effects in the bias voltage range of [+0.4 V,+0.8 V].The highest rectification ratios are 5.4×104,3.8×105,and 2.1×106,respectively.The projected density of states further confirms the high rectification ratio of the device at +1.0 V bias.Under the Cu-Cr co-doping condition,the device current decreases somewhat at +0.9 V bias with increasing channel length in the center region,but the overall rectification performance is significantly improved in the [+0.5 V,+0.7 V] bias range. Reference | Related Articles | Metrics | Comments（0）

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Preliminary Evaluation on the Safety of Volatile Oil of the Alpinia japonica Rhizome in Tujia Medicine WU Meijing, WANG Zirong, JI Xiushuai, LIANG Yumin, XU Rui, XIANG Lu, XU Taijing, CHEN Xi, XIANG Juan Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 67-73.   DOI: 10.13438/j.cnki.jdzk.2024.02.010 Abstract （63）      PDF（pc） （3534KB）（134）       Knowledge map    Save With mice as the experimental subject,the safety of the volatile oil of the Alpinia japonica (Thunb.) Miq Rhizome (AJV) was evaluated through acute toxicity test and subacute toxicity test.The acute toxicity test was divided into the AJV group and control group.The acute toxicity test was conducted with a maximum tolerance dose 5 mL/kg of volatile oil.The subacute toxicity test was divided into low-dose AJV group (1.3 g/kg) and high-dose AJV group (2.6 g/kg) and control group,and the drugs were intragastrically administered once a day for 15 consecutive days.After administration,the physical signs of the mice were observed,body weight and organ coefficient were recorded,the contents of urea nitrogen and creatinine in plasma and the activities of alanine aminotransferase and aspartate aminotransferase in serum were detected,and histopathological examination was performed.The results showed that compared with the control group,the physical signs of most mice were normal after administration,and some mice had vertical hair.There were no significant changes in organ coefficient,urea nitrogen content,creatinine content,alanine aminotransferase activity and aspartate aminotransferase activity of mice (P>0.05).Compared with the weight at the beginning of the experiment,the weight of the mice did not decrease at the end of the experiment.One mouse died in the acute toxicity test.In the subacute toxicity test,the alanine aminotransferase level of 1 mouse significantly increased (135.30 U/L).Pathological findings showed that 1 mouse had liver tissue inflammation and 1 mouse had liver fibrosis.The results indicated that the acute toxicity of volatile oil was low,but it may cause some hepatotoxicity with high dosage in clinic.Attention should be paid to its safety. Reference | Related Articles | Metrics | Comments（0）

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Application of Remimazolam Combined with Esketamine  in Pediatric Surgery FU Yan, ZHAO Cheng, ZHANG Zhimeng, HUANG Dayan Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 79-83.   DOI: 10.13438/j.cnki.jdzk.2024.02.012 Abstract （63）      PDF（pc） （393KB）（134）       Knowledge map    Save In order to explore the application effect of remimazolam combined with esketamine in tonsil or (and) adenoid surgery in children,children who planned to undergo tonsil or (and) adenoid resection were selected as study objects,and were randomly divided into observation group (given remimazolam combined with esketamine) and control group (given propofol combined with sufentanil).The mean arterial pressure,heart rate,FLACC score,Aono score,postoperative coughing,postoperative vomiting,extubation time and propofol addition before extubation were compared between the two groups.The results showed that the mean arterial pressure and heart rate during intubation and 5 min after intubation in observation group were higher than those in control group.The extubation time and the number of propofol addition before extubation in the observation group were significantly less than those in the control group.The FLACC score,Aono score,postoperative agitation rate and postoperative choking rate of the observation group were significantly lower than those of the control group,but the incidence of postoperative nausea and vomiting was not significantly different between the two groups.The application of remimazolam combined with esketamine in tonsillectomy or (and) adenoidectomy in children is effective,has stable hemodynamic characteristics,and helps to reduce the risk of perioperative hypotension,the incidence of postoperative adverse reactions,and further improves the recovery quality  of children. Reference | Related Articles | Metrics | Comments（0）

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Multi-Channel Cooperative Routing Cross-Layer Control System of Communication Network Based on IPv6 LI Miao Journal of Jishou University(Natural Sciences Edition)    2023, 44 (5): 35-41.   DOI: 10.13438/j.cnki.jdzk.2023.05.005 Abstract （192）      PDF（pc） （949KB）（133）       Knowledge map    Save A multi-channel collaborative routing cross layer control system (referred to as the cross layer control system) for power communication networks based on IPv6 is designed to address issues such as transmission delay and channel collision caused by limited IP allocation.The hardware part of the system uses IPv6 technology to establish a communication protocol stack,and uses communication network collaboration routing to achieve cross layer control of devices such as databases,processors,and controllers in the system.The software uses the information generated by the protocol stack to build a routing control system,and uses multiple ant colony optimization algorithms to find the optimal communication path for multi-channel cooperation in the power communication network,achieving cross layer control of multi-channel cooperation routing in the power communication network.Selecting information transmission delay,channel node collision rate,and throughput as evaluation criteria,a comparative experiment was conducted between the multiple ant colony cross layer control algorithm,ant colony algorithm,and Newton algorithm.The results showed that the delay of the multiple ant colony cross layer control algorithm was maintained at around 0.03 seconds.When the number of tasks was less than 100,there was no node collision phenomenon,and the throughput was higher than 520 MB/s.This indicates that the cross layer control system has better routing cross layer control effect. Reference | Related Articles | Metrics | Comments（0）