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Journal of Jishou University(Natural Sciences Edition) 2024 Vol.45 Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select 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 （88）      PDF（pc） （301KB）（158）       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） Select 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 （88）      PDF（pc） （306KB）（147）       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） Select 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 （78）      PDF（pc） （309KB）（139）       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） Select 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 （88）      PDF（pc） （883KB）（118）       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） Select 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 （87）      PDF（pc） （741KB）（167）       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） Select 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 （73）      PDF（pc） （656KB）（135）       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） Select 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 （93）      PDF（pc） （703KB）（126）       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） Select 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 （60）      PDF（pc） （843KB）（135）       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） Select 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 （77）      PDF（pc） （754KB）（131）       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） Select 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 （78）      PDF（pc） （450KB）（122）       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） Select 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 （78）      PDF（pc） （464KB）（128）       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） Select 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 （75）      PDF（pc） （8763KB）（150）       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） Select 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 （114）      PDF（pc） （470KB）（169）       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） Select 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 （73）      PDF（pc） （410KB）（123）       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） Select 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 （71）      PDF（pc） （405KB）（121）       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） Select 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 （19）      PDF（pc） （295KB）（43）       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） Select 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 （22）      PDF（pc） （2260KB）（50）       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） Select Properties of Equivalent Sequences and Applications XU Beining, XU Shaoyuan Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 18-23.   DOI: 10.13438/j.cnki.jdzk.2024.02.003 Abstract （18）      PDF（pc） （353KB）（40）       Knowledge map    Save This article introduces the equivalence relationship in set theory into mathematical analysis,proposes the concept of equivalent sequence,obtains several properties of equivalent sequence,and provides examples to illustrate the applications of equivalent sequences in mathematical analysis,linear algebra,and functional analysis. Reference | Related Articles | Metrics | Comments（0） Select Application of an Entangled Chaotic System in Image Encryption DAI Wenpeng, CHEN Heng, SONG Li, LI Yongxing, HE Na Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 24-34.   DOI: 10.13438/j.cnki.jdzk.2024.02.004 Abstract （25）      PDF（pc） （6845KB）（49）       Knowledge map    Save Based on the principle of entanglement chaotic system,a kind of entanglement chaotic system with sinusoidal entanglement term is constructed.The dynamic characteristics of the system,including Lyapunov exponent (LE),bifurcation diagram and power spectrum,are analyzed by MATLAB software.In order to verify the feasibility of the circuit principle,experiments were carried out based on the Multisim circuit simulation software,and the operability of the circuit principle was proved.Finally,the chaotic sequence generated by the system is combined with DNA algorithm to encrypt the image,and the encryption is realized in the sensitive parameter range.The information entropy of the encrypted image is as high as 7.993,the histogram of gray scale is uniform,the correlation between adjacent pixels is low,and the correlation coefficient approaches 0,which shows that the security of the entangled chaotic system is good,the field of image encryption has high application value and high security performance. Reference | Related Articles | Metrics | Comments（0） Select Improved Spectrum Sensing Algorithm Based on the Difference of Limit Eigenvalues TIAN Kun, TAN Zhewen, TAN Yuhao, LEI Kejun, YANG Xi Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 35-39.   DOI: 10.13438/j.cnki.jdzk.2024.02.005 Abstract （20）      PDF（pc） （615KB）（41）       Knowledge map    Save Based on the difference between the maximum and minimum eigenvalues (DMME) of the sample covariance matrix,to improve the setting accuracy of sensing decision threshold,a new method is proposed to calculate the threshold by using the latest results of limiting eigenvalue distribution of Wishart matrix.Compared with the traditional DMME algorithm,the decision threshold setting of the proposed algorithm is more accurate.While improving the reliability of decision results,it improves the detection performance of the algorithm with limited number of samples.Both the theoretical analysis and simulation results verify the effectiveness of the proposed DMME algorithm. Reference | Related Articles | Metrics | Comments（0） Select Point-Absorbing Wave Energy Converter Based on Nonlinear Pendulum Stiffness Mechanism Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 40-44.   DOI: 10.13438/j.cnki.jdzk.2024.02.006 Abstract （17）      PDF（pc） （1527KB）（43）       Knowledge map    Save In order to achieve stable capture of ocean low-frequency wave energy,a point-absorbing wave energy converter based on a nonlinear pendulum stiffness mechanism was designed.A compact pendulum stiffening device was constructed through addition of simple tensile elastic elements between the pendulums.The force analysis of the nonlinear stiffness structure was carried out the time domain dynamic model of the nonlinear wave energy converter was established based on the Cummins equation,and the wave energy conversion characteristics of the point absorption wave energy converter under the action of regular waves were analyzed.Numerical simulation shows that through introduction of an appropriate nonlinear pendulum stiffness mechanism,the motion response of the system under wave excitation can be improved,and the frequency corresponding to the peak motion response of the system under wave excitation can be reduced,thereby improving the system's capture efficiency of low-frequency energy. Reference | Related Articles | Metrics | Comments（0） Select Seismic Performance Analysis of Multi-Span Curved Continuous Girder Bridges Based on Friction Pendulum Spherical Bearings LI Yue, NING Zhe, YAN Yong, SHAN Honglan, LUO Anran Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 45-55.   DOI: 10.13438/j.cnki.jdzk.2024.02.007 Abstract （12）      PDF（pc） （1968KB）（37）       Knowledge map    Save To study the seismic performance and vibration isolation method of multi-span curved continuous girder bridge,a finite element model is established for the multi-span curved continuous girder bridge with friction pendulum spherical bearings,and the dynamic characteristics and nonlinear time analysis is carried out.Results show that the longitudinal stiffness of the bridge model is weaker than the transverse stiffness,and the first-order vibration mode contributes more to the longitudinal seismic response of the bridge pier,and the vibration mode participation coefficient is 29.8%;the sixth-order vibration mode contributes more to the transverse seismic response of the bridge pier,and the vibration mode participation coefficient is 20%;under the E1 earthquake,the friction pendulum spherical bearing can keep the bridge in elastic working condition,and the bearing deformation and expansion joint width meet the requirements,which proves the effectiveness of the selected and arranged friction pendulum spherical bearing;under the E2 earthquake,the maximum bending moment demand of the section of some piers is greater than the bending capacity of the section,but further strength tests were carried out on the piers,and they all meet the seismic demand. Reference | Related Articles | Metrics | Comments（0） Select 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 （17）      PDF（pc） （7279KB）（45）       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） Select Reading Promotion Mechanism of Rural Libraries in Wuling Mountainous Area from the Perspective of Cooperative Governance WANG Yue'e, LI Shi, LU Shuyi Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 63-66.   DOI: 10.13438/j.cnki.jdzk.2024.02.009 Abstract （19）      PDF（pc） （416KB）（36）       Knowledge map    Save Taking Xiangxi Tujia and Miao Autonomous Prefecture in Wuling mountainous area as an example,this paper analyzes the current situation and existing problems of reading promotion in rural libraries in this region from the perspective of collaborative governance,and constructs the reading promotion mechanism of rural libraries,such as the mechanism of main rights and responsibilities,communication and feedback,resource sharing,supervision and evaluation,qualified staff and so on. Reference | Related Articles | Metrics | Comments（0） Select 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 （12）      PDF（pc） （3534KB）（39）       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） Select Early Catch-up Growth of Preterm Infants with High Nutritional Risk in Xiangxi HUANG Jun, SHI Lei, LIU Lintao, WU Hongyan, TIAN Yan, TIAN Hongyan Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 74-78.   DOI: 10.13438/j.cnki.jdzk.2024.02.011 Abstract （21）      PDF（pc） （448KB）（37）       Knowledge map    Save To investigate the early catch-up growth of preterm infants with high nutritional risk in Xiangxi.A total of 23 preterm infants with high nutritional risk born from June 2021 to April 2022  in the Children's Health and Rehabilitation Department of Xiangxi Autonomous Prefecture People's Hospital were recruited,and all of them accepted individualized nutrition guidance program.The Z-score method was used to evaluate  weight,height  and head circumference.The results show that the Z-scores of weight-for-age (WAZ),height-for-age (HAZ) and head circumference-for-age (HCZ) at birth of the 23 preterm infants were significantly less than -2,which were -4.34±0.99,-5.12±1.61 and -4.60±1.62 respectively.The weight,height and head circumference,WAZ,HAZ and HCZ at 3 months and 6 months were significantly higher than those at birth (P<0.001).At 6 months of age,the proportions of WAZ,HAZ and HCZ greater than or equal to -2 were 78.26%,52.17% and 73.91% respectively.This suggests that through the early scientific nutrition guidance,the preterm infants with high nutritional risk will have a rapid physical growth within 6 months after birth.Most preterm infants catch up in weight,head circumference firstly,and then height. Reference | Related Articles | Metrics | Comments（0） Select 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 （16）      PDF（pc） （393KB）（39）       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） Select Effect of Multi-Mode Analgesia Combined with Psychological Intervention on Postoperative Delirium in Aged Patients After Femoral Surgery TANG Xiaohui Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 84-88.   DOI: 10.13438/j.cnki.jdzk.2024.02.013 Abstract （16）      PDF（pc） （394KB）（37）       Knowledge map    Save To explore the effect of multi-mode analgesia combined with personalized psychological intervention on postoperative delirium in aged patients after femoral surgery,80 aged patients with femoral fracture admitted to the Department of Orthopedics of Jishou People's Hospital of Hunan Province from January 2021 to August 2023 were randomly divided into observation group (40 cases) and control group (40 cases).The observation group was given multi-mode analgesia combined with personalized psychological intervention,and the control group was given routine postoperative analgesia.The hemodynamic  index at different time after operation,blood gas index on the first day after operation,sleep quality,relief of pain and anxiety,and delirium occurrence in the two groups of patients were observed and analyzed.The results showed that compared with the control group,the patients in the observation group had lower heart rate,lower mean arterial pressure,lower resting and activity pain scores before anesthesia,at the beginning and the end of surgery;on the 1st,3rd and 7th day after surgery,the score of insomnia and the probability of postoperative delirium were lower;the blood gas indexes PaO2,SaO2 and OI were higher on the 1st day after surgery;and the differences in the above indexes between the two groups were statistically significant (P<0.05).It can be concluded that the method of multi-mode analgesia combined with individual psychological intervention can play an active role in maintaining the stability of respiration and circulation,improving the postoperative sleep quality,relieving the postoperative pain and anxiety,and promoting the postoperative rapid rehabilitation of the patients,and it can reduce the incidence of postoperative delirium and improve the cognitive function of aged patients,which is an important part of rapid rehabilitation surgery. Reference | Related Articles | Metrics | Comments（0） Select Portfolio Optimization Based on an Improved Black-Litterman Model HUANG Yi, JIANG Wenzheng Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 89-96.   DOI: 10.13438/j.cnki.jdzk.2024.02.014 Abstract （27）      PDF（pc） （524KB）（37）       Knowledge map    Save For the "imperfect effectiveness" of financial markets and the "imperfect rationality" of investors,an improved Black-Litterman model combining investor views and multi-channel information is developed by means of the Bayesian framework to determine the optimal personalized investment strategies.In an empirical study of the Chinese stock market,the problem of quantifying investor views is addressed using the SVM-ARIMA-GARCH model.Compared with several reference strategies,the optimal investment strategy identified by the improved Black-Litterman model has a more robust out-of-sample performance,with higher Sharpe ratios and lower turnover ratios in different market conditions. 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