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Analysis of Consumer Satisfaction of Domestic Brand Sports Goods：Take Li Ning sports goods as an Example YUAN Han Journal of Jishou University(Natural Sciences Edition)    2021, 42 (5): 70-74.   DOI: 10.13438/j.cnki.jdzk.2021.05.013 Abstract （1461）      PDF（pc） （396KB）（654）       Knowledge map    Save The article aims to explore the relationship between the product characteristics, service quality, brand image and consumer satisfaction of domestic brand sports products. Taking the domestic brand Li Ning sports goods as an example, through questionnaire surveys, the collected data are collected and the samples are analyzed and verified by statistical methods. The study found that: the demographic variables are different in product characteristics, service quality, brand image and consumer satisfaction, and there is no difference between age and product characteristics, service quality, brand image and consumer satisfaction. There are obvious differences between groups; among the various variables of golf age for product characteristics, service quality, brand image and consumer satisfaction, there is a difference between golf age and brand image between 1~5 years and 6~10 years. Obvious inter-group differences; there is no obvious inter-group difference among the variables of monthly income for product characteristics, service quality, brand image and consumer satisfaction. The relationship between product characteristics, service quality, brand image and consumer satisfaction is observed by Pearson's correlation coefficient value. It is found that product characteristics, service quality, and brand image have a significant positive impact on consumer satisfaction. And put forward relevant suggestions, hoping to provide theoretical reference for other domestic brands. Reference | Related Articles | Metrics | Comments（0）

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Theoretical Derivation of the Kramers-Kronig Relationship Based on the Fourier Transform SU Hongmei Journal of Jishou University(Natural Sciences Edition)    2022, 43 (3): 48-51.   DOI: 10.13438/j.cnki.jdzk.2022.03.008 Abstract （713）      PDF（pc） （323KB）（558）       Knowledge map    Save From the causal law of physical experimental facts,without concrete microscopic physical model, this paper discusses the physical mechanism and theoretical derivation of the Kramers-Kronig relationship based on Fourier transform,dispersion theory,and residue theorem. Reference | Related Articles | Metrics | Comments（0）

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Review of Hybrid Beamforming Technology for Millimeter Wave Massive MIMO System LIU Jian, QIAN Yingjing, ZHANG Renmin Journal of Jishou University(Natural Sciences Edition)    2022, 43 (1): 43-52.   DOI: 10.13438/j.cnki.jdzk.2022.01.008 Abstract （997）      PDF（pc） （705KB）（543）       Knowledge map    Save In view of hybrid beamforming techniques for mmWave communications,we first describe the transmission characteristics of the mmWave  and its channel model,and outline the architecture of a massive mmWave MIMO hybrid beamforming system and its mathematical model.On that basis,we summarize  the transmission scheme and introduce two feasible methods of mmWave beam alignment.Finally,the typical applications  of mmWave communication integrated with other technologies and the future research hotspots  are anticipated. Reference | Related Articles | Metrics | Comments（0）

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Vehicle Re-Identification Based on Multi-Scale and Wavelet Spatial Attention LIAO Guangkai, ZHANG Zheng, NIU Yibo, SONG Zhiguo Journal of Jishou University(Natural Sciences Edition)    2021, 42 (6): 15-22.   DOI: 10.13438/j.cnki.jdzk.2021.06.003 Abstract （670）      PDF（pc） （5379KB）（488）       Knowledge map    Save For the problem that the multi-scale vehicle re-identification model is short of extracted detail features, a re-identification model combining multi-scale vehicle features and wavelet attention mechanism is designed.  Firstly, spatial wavelet attention module is embedded into the model to obtain more details for the network. Secondly, a hierarchical fusion network is proposed, which integrates the features of different scales to improve the ability of global feature aggregation. Finally, TriHard and CrossEntropy Loss functions are used to construct the object function of vehicle identification. Experimental results of this model compared with other excellent models on VeRi and VehicleID datasets show that vehicle re-identification accuracy can be improved by embedding spatial wavelet attention into multi-scale networks. Reference | Related Articles | Metrics | Comments（0）

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An Improved Whale Optimization Algorithm Based on Levy Flight and Brownian Motion YU Cunwei, MO Liping, WAN Runze Journal of Jishou University(Natural Sciences Edition)    2023, 44 (2): 24-32.   DOI: 10.13438/j.cnki.jdzk.2023.02.004 Abstract （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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Image Encryption Algorithm Based on 5D Hyperchaotic System WU Chaoyang, ZHOU Ying Journal of Jishou University(Natural Sciences Edition)    2021, 42 (6): 4-14.   DOI: 10.13438/j.cnki.jdzk.2021.06.002 Abstract （708）      PDF（pc） （13483KB）（392）       Knowledge map    Save A novel image encryption method is put forward based on 5D hyperchaotic system. At first, initial values of 5D hyperchaotic system are calculated based on secret keys and chaotic sequences are generated. Then chaotic sequences are preprocessed to get new chaotic sequences. Two-dimensional permutation  is executed to plain image based on column and row sorting. The cycle shift is also employed to improve the security of the scheme. Diffusing operation is performed at last and encrypted image is obtained. Experimental results and theoretical analysis prove that the method possesses a large key space and could resist kinds of attacks. Reference | Related Articles | Metrics | Comments（0）

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Synthesis, Structure, and Photoluminescence Properties of Mn(II)-Based Metal Complex LIANG Yuxin, GAO Huizhi, WANG Xingyue, QI Zhikai Journal of Jishou University(Natural Sciences Edition)    2021, 42 (6): 36-40.   DOI: 10.13438/j.cnki.jdzk.2021.06.006 Abstract （898）      PDF（pc） （2500KB）（348）       Knowledge map    Save A novel Mn-based complex of Mn(choline)Cl3 (choline=C5H14NO) was synthesized by solvent evaporation. Single crystal X-ray diffraction analysis shows that the crystal structure of this complex consists of one-dimensional chains formed by the edge-shared [MnCl5O] octahedra, and these chains link each other with the adjacent ones into a three-dimensional network through intermolecular hydrogen bonds.UV-vis absorption spectrum and photoluminescence spectrum shows that this complex exhibited high efficient red-light emission induced by the d-d electron transition of (t2g)3(eg) to (t2g)4(eg)1. The photoluminescence quantum yield reaches to 37.32% and the average lifetime is 1.18 ms. In addition, it has excellent thermal stability (300 ℃). These results show that this Mn-based complex has potential applications in the field of optoelectronic devices. 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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Is the Social Connection as Close as Possible?：Based on An Empirical Study on the Impact of Resource Bricolage on the Performance of SMEs LI Lu, ZHANG Huaiying, ZHANG Yan Journal of Jishou University(Natural Sciences Edition)    2022, 43 (1): 77-84.   DOI: 10.13438/j.cnki.jdzk.2022.01.011 Abstract （1104）      PDF（pc） （531KB）（318）       Knowledge map    Save Under the background of resource constraint,social connection has contingency effect on resource allocation and development process.Based on the resource orchestration theory,this paper integrates resource bricolage,social connection strength and innovation performance into the same analysis framework,and empirically tests the influence of resource bricolage on innovation performance of SMEs under the business connection strength and political connection strength.The results show that resource bricolage has a positive impact on innovation performance of small and medium-sized enterprises;The intensity of business connection plays a negative role in regulating the relationship between resource bricolage and the innovation performance of SMEs.The intensity of political connection plays a positive role in regulating the relationship between resource bricolage and the innovation performance of SMEs.Enterprise managers should put together the resource attributes and contents according to the current needs,and must actively think about strategies and selectively develop social ties. Reference | Related Articles | Metrics | Comments（0）

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Progress in the Diagnosis and Treatment of Primary Central Nervous System Diffuse Large B-Cell Lymphoma ZHANG Rujiang, ZHANG Yunzhou, GAO Daiquan Journal of Jishou University(Natural Sciences Edition)    2021, 42 (6): 54-61.   DOI: 10.13438/j.cnki.jdzk.2021.06.009 Abstract （767）      PDF（pc） （3932KB）（314）       Knowledge map    Save In order to further improve the understanding of primary central nervous system diffuse large B-cell lymphoma (PCNS-DLBCL), PubMed, CNKI and other databases were used to search related literature on the diagnosis and treatment of primary central nervous system lymphoma, and then The pathogenesis, clinical manifestations, diagnostic methods and treatment measures of PCNS-DLBCL are reviewed. PCNS-DLBCL is a subtype of extranodal non-Hodgkin’s lymphoma that can affect any part of the central nervous system. Its pathogenesis includes the presence of Epstein-Barr virus, increased expression of PD-L1 and PD-L2, MYD88 gene mutation and CD79B Gene mutations, etc.; clinical manifestations lack specificity, high degree of malignancy, easy to relapse, and poor prognosis; diagnostic methods include imaging examination, cerebrospinal fluid examination, immunohistochemistry and histopathological examination, pathological examination is the gold standard for diagnosis; PCNS-DLBCL treatment measures include radiotherapy, chemotherapy, autologous stem cell transplantation, and combined radiotherapy and chemotherapy. At present, induction chemotherapy based on high-dose methotrexate is the best treatment plan. 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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On Influencing Factors of Health Behavior Change of Rural Residents in Underdeveloped Areas：Model Construction Based on Theory of Planned Behavior GONG Fangmin, GONG Zhuliu Journal of Jishou University(Natural Sciences Edition)    2022, 43 (1): 64-76.   DOI: 10.13438/j.cnki.jdzk.2022.01.010 Abstract （586）      PDF（pc） （804KB）（307）       Knowledge map    Save We collected the data of rural residents in underdeveloped western Hunan through a questionnaire survey and in-depth interviews.Based on the data analysis,this paper analyzed the internal mechanism of farmers' health behavior change in the post-poverty alleviation era.Different from previous studies,this study attempts to integrate media use and health knowledge into the theoretical model of planned behavior and explores the influence of media use on farmers' health behavior through a structural equation model.The results show that:The use of media has a significant positive impact on rural residents' health behavior,and also has an indirect impact on health behavior through self-efficacy,behavioral attitude and subjective norms;Social media is an effective channel for the change of rural residents' health behavior;The unhealthy behaviors of rural residents mainly focus on smoking,drinking and eating preserved food by a positive attitude towards these behaviors.Cultural customs and power demands are the factors that are difficult to change unhealthy behaviors;The role of health knowledge is not significant,and there may be mediating variables from health knowledge to health behavior,and the proliferation of pseudo-health information that makes it difficult to achieve health knowledge adoption and thus does not lead to changes in poor health behavior. Reference | Related Articles | Metrics | Comments（0）

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Design of Controller for Pure Electric Bus Based on STM32 WANG Guoyi, YUAN Tao, YU Xingguo, LI Hao Journal of Jishou University(Natural Sciences Edition)    2022, 43 (3): 52-56.   DOI: 10.13438/j.cnki.jdzk.2022.03.009 Abstract （465）      PDF（pc） （610KB）（307）       Knowledge map    Save A pure electric bus controller based on STM32 is designed through analyzing the function and running state of pure electric bus control. The function of each module of the controller is analyzed,and the power supply circuit and voltage detection circuit are designed. The controller adjusts the speed of the DC motor through outputting pulse width modulation with different duty cycles.The information collected by the sensor is transmitted to the microprocessor in real time through the CAN bus,and the microprocessor analyses the collected information and sends commands through CAN bus to control the running state of the bus safely,accurately and in real time. Reference | Related Articles | Metrics | Comments（0）

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Superconducting Magnetic Energy Storage Used for Grid Stability in Xiangxi YANG Yang, CHEN Guangsi, LI Linfeng, WANG Chaoming, LI Xinran, CHEN Changqing, LU Chunjing Journal of Jishou University(Natural Sciences Edition)    2021, 42 (5): 50-55.   DOI: 10.13438/j.cnki.jdzk.2021.06.009 Abstract （548）      PDF（pc） （2011KB）（297）       Knowledge map    Save Xiangxi  is the main power source of Hunan Province. The stability of Xiangxi regional power grid is affected by the seasonal  hydroelectric power generation and the  wind power generation. In order to improve the stability of Xiangxi regional power grid, the superconducting magnetic energy storage (SMES) system is connected to provide real-time and rapid power support to the power grid, so as to solve the instability problem caused by system failure or new energy access. We build an equivalent simplified model in power system analysis software package and simulate the disturbance of the power grid. Then we connect the superconducting magnetic energy storage system in above model, and analyze its positive impact on the stability of the system through the changes of the power angle and voltage of the system. Reference | Related Articles | Metrics | Comments（0）

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Effect of Propranolol Combined with Amiodarone on Malignant Arrhythmia BAI Song, ZHAO Dongxian, XU Shanshan, LI Juan, SU Xiaowei, LIU Yan Journal of Jishou University(Natural Sciences Edition)    2021, 42 (5): 61-64.   DOI: 10.13438/j.cnki.jdzk.2021.05.011 Abstract （722）      PDF（pc） （371KB）（292）       Knowledge map    Save To investigate the effects of propranolol combined with amiodarone on inflammatory factors and QT interval dispersion in patients with malignant arrhythmia. 92 patients with malignant arrhythmia treated in our hospital from February 2018 to June 2020 were randomly divided into two groups with 46 cases in each group. The control group was given amiodarone hydrochloride tablets on the basis of routine treatment, and the observation group was given propranolol hydrochloride tablets on the basis of the control group. The clinical efficacy, inflammatory factors, QT interval dispersion and adverse reactions were compared between the two groups. The results showed that the total effective rate in the observation group was 93.48%, which was higher than 78.26% in the control group (P<0.05). Tumor necrosis factor after treatment α， Interleukin-6, C-reactive protein and QT interval dispersion were lower than those before treatment, but more in the observation group (P<0.05). There were 3 cases of adverse reactions in the control group, which had no significant difference compared with 4 cases in the observation group (P>0.05). It shows that propranolol combined with amiodarone can significantly enhance the clinical efficacy, alleviate inflammatory reaction, reduce QT interval dispersion and have higher safety than amiodarone alone. Reference | Related Articles | Metrics | Comments（0）

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Variable Neighborhood Artificial Bee Colony Algorithm  to Solve Distribution Center Location Problem JIANG Ting Journal of Jishou University(Natural Sciences Edition)    2021, 42 (5): 27-33.   DOI: 10.13438/j.cnki.jdzk.2021.06.005 Abstract （756）      PDF（pc） （521KB）（281）       Knowledge map    Save For the problem of logistics distribution center location，a variable neighborhood artificial bee colony (VNABC) algorithm is presented. In order to ensure the diversity of solutions and enhance the local search ability, the algorithm introduces variable neighborhood search, designs three neighborhood operators and improves the shaking strategy. In order to improve the convergence speed, the global optimum solution is used to replace the current solution in the onlooker bees phase.The simulation experiment results show that the algorithm has reached an effective balance between exploration and exploitation, and it performs well in terms of solution speed and stability. 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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Load Forecasting of Urban Residential District Based on LSTM-AdaBoost LI Longxiang, PENG Chen, LI Jun, WANG Yuyan, LU Rongbo Journal of Jishou University(Natural Sciences Edition)    2021, 42 (6): 30-35.   DOI: 10.13438/j.cnki.jdzk.2021.06.005 Abstract （579）      PDF（pc） （478KB）（272）       Knowledge map    Save In smart cities, accurate residential load forecasting is the key to achieving a balance between power supply and demand and reducing resource waste. In order to improve the accuracy of load forecasting of urban residential districts, a short-term load forecasting model LSTM-AdaBoost, which combines long and short-term memory network (LSTM) and ensemble learning, is proposed. The model uses dew point (the temperature at which water vapor in the air condenses into water droplets), historical load, week type and other characteristics as data input; then the LSTM network with timing memory function is used as the base learner for integrated learning; finally, the ensemble AdaBoost  algorithm performs a weighted combination of the base learner to obtain a strong learner. Experimental results show that the integrated LSTM-AdaBoost model has higher forecast accuracy than single forecasting methods such as LSTM network, support vector machine (SVM) and CART decision tree. Reference | Related Articles | Metrics | Comments（0）

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Target Recognition and Location Detection Technology of Pipeline Inspection Robot SONG Leizhen, SUN Xiaodong Journal of Jishou University(Natural Sciences Edition)    2021, 42 (5): 38-43.   DOI: 10.13438/j.cnki.jdzk.2021.05.007 Abstract （783）      PDF（pc） （500KB）（271）       Knowledge map    Save To solve the problem of low accuracy of pipeline inspection robot in identifying target sludge inside pipeline, an improved YOLO model based on a new learning rate updating strategy was is proposed. The model adopteds deep learning convolutional network to conduct target image learning and training. For the problem of inaccurate location, a distance location model is proposed to achieve accurate location of target distance. Comparative training tests were conducted on YOLO model (Model A) under the new learning rate updating strategy, YOLO model (Model B) under the constant attenuated learning rate updating strategy, YOLO model (Model C) under the exponential attenuated learning rate updating strategy, and YOLO model (Model D) using the traditional gradient descent method. The results showed that the improved YOLO model (Model A) achieved 96.1% accuracy of target detection with location error less than 2 cm. Reference | Related Articles | Metrics | Comments（0）

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Necessity and Realization Path of Ideological and Political Education Integrated into College Physical Education GUO Haiying, HUANG Yuzhe Journal of Jishou University(Natural Sciences Edition)    2021, 42 (6): 89-92.   DOI: 10.13438/j.cnki.jdzk.2021.06.015 Abstract （939）      PDF（pc） （395KB）（267）       Knowledge map    Save Ideological and political education and physical education are the essential contents of college education. To integrate ideological and political education into school physical education is the necessary exploration under the new era and new situation, and the inevitable requirement of the big ideological and political pattern. At present, there are some problems in the integration of ideological and political education into college physical education, such as neglecting ideological and political education, outdated carrier, lack of path and strategy. The research suggests that we should not forget the original intention of physical education and attach importance to ideological and political education, innovate the means and carrier of ideological and political education, strengthen the training of teachers' curriculum ideological and political strategies, in the physical education teaching, extracurricular sports activities, sports competitions and other aspects of detailed curriculum ideological and political action into college physical education. 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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Changsha Dialect Recognition Based on CTC-GRU Model LIANG Xiaolin, SHEN Xiangfei, LIANG Zhao, QIU Hailin Journal of Jishou University(Natural Sciences Edition)    2022, 43 (2): 45-52.   DOI: 10.13438/j.cnki.jdzk.2022.02.008 Abstract （552）      PDF（pc） （589KB）（255）       Knowledge map    Save In order to recognize continuous speech in Changsha dialect with a large vocabulary,a gated linear element neural network model based on Connectionist Temporal Classification(CTC) algorithm is proposed.Firstly,the characteristic parameters of speech are extracted by Mel-scale Frequency Cepstral Coefficients(MFCC),and then the extracted characteristic parameters are input into gated linear unit neural network.CTC algorithm is used for training and optimization,and the whole prediction label of input sequence is obtained.Finally,the results of the CTC model,the GRU model and the CTC-GRU model are compared on the self-built corpus of Changsha dialect,and the Word Error Rate(WER) is taken as the evaluation index.The results show that the CTC-GRU model can achieve faster convergence and greater accuracy compared with the other two models. Reference | Related Articles | Metrics | Comments（0）

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Impact of Financial Openness on Financial Agglomeration and Regional Heterogeneity  of Yangtze River Delta Urban Agglomeration： Clustering Analysis Based on Feature Extraction MA Hanjiang, YU Xiaolan Journal of Jishou University(Natural Sciences Edition)    2022, 43 (1): 85-96.   DOI: 10.13438/j.cnki.jdzk.2022.01.012 Abstract （472）      PDF（pc） （2770KB）（255）       Knowledge map    Save According to the panel data of 26 cities in the Yangtze River Delta urban agglomeration from 2005 to 2018,this paper uses factor analysis to evaluate the degree of financial agglomeration of cities over the years,and uses the financial openness index to conduct the K-means dynamic clustering division based on feature extraction,and empirically analyzes the impact of financial openness on the financial agglomeration of cities in the Yangtze River Delta.The results show that,on the whole,financial opening up has a significant positive impact on the degree of urban financial agglomeration,but this promoting effect is mainly concentrated in the developed cities with higher level of financial opening up,and shows a negative inhibitory effect in the less developed cities with lower level of opening up,which shows obvious heterogeneity among regions. Reference | Related Articles | Metrics | Comments（0）

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Error Bound Estimation for Linear Complementarity Problems of B-Matrices LI Huijun, MO Hongmin, HUANG Jiaxian Journal of Jishou University(Natural Sciences Edition)    2021, 42 (5): 20-26.   DOI: 10.13438/j.cnki.jdzk.2021.06.004 Abstract （689）      PDF（pc） （295KB）（251）       Knowledge map    Save According to the upper bound of the infinite norm of the inverse matrix of strictly diagonally dominant M-matrix, a new error bound of the solution of the linear complementarity problem of B-matrix is obtained by using the technique of inequality scaling. 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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Preparation of Li4Ti5O12 by Solid-State Method and Exploration of Calcination Temperature LONG Ruilai, WU Xianming, WU Xiuting, YIN Caishuo Journal of Jishou University(Natural Sciences Edition)    2022, 43 (3): 72-78.   DOI: 10.13438/j.cnki.jdzk.2022.03.012 Abstract （523）      PDF（pc） （7320KB）（250）       Knowledge map    Save Li4Ti5O12 powders were prepared by solid-state reaction and two-step calcination method with Li2CO3 and TiO2 as starting materials and anhydrous ethanol as dispersant.The microstructure and morphology of the materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).The electrochemical properties of the materials were tested by constant current charge-discharge,AC impedance and cyclic voltammetry.The results show that the pure phase Li4Ti5O12 with complete crystal structure could be synthesized after calcination at 800  ℃ for 6h,and uniform dispersion with particle size of 200~400 nm.The first reversible specific capacity of the Li4Ti5O12 sample was 157.67 mA·h/g at the rate of 0.5 C,and the coulombic efficiency was 96.1%,the capacity retention was 94.3% after 100 cycles.The first reversible specific capacity was 107.0 mA·h/g at the rate of 0.5C,the coulombic efficiency was 96.1% and capacity retention was 84.1% after 1 000 cycles. Reference | Related Articles | Metrics | Comments（0）

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Thermal Lens Effect with Low-Power Laser LIN Yiping, CHEN Kexiong, LI Lingyan, LIU Jingfeng Journal of Jishou University(Natural Sciences Edition)    2022, 43 (4): 34-41.   DOI: 10.13438/j.cnki.jdzk.2022.04.007 Abstract （579）      PDF（pc） （4462KB）（249）       Knowledge map    Save COMSOL Multiphysics 5.5 software was used to build a model to study the relationship between the change of lens focal length and the change of laser power.The experimental scheme was designed through theoretical analysis and the formula for calculating the focal length of the thermal lens was determined.Experiments were conducted to explore the thermal lens effect with low power laser,and the visualization of the thermal lens effect with low-power laser was realized.The soy sauce lens was measured as thermal concave lens.Using knife edge method and software fitting measurement of laser radius,combined with other data to calculate the focal length of the thermal concave lens,the measured relative error was 3.6%.Finally,taking the focal length as the intensity reference of the thermal lens effect,the measured intensity of the thermal lens effect was positively correlated with the optical power. 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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Liu Estimation in Partially Linear Varying Coefficient Models AN Bailing, LU Qi, MA Ning Journal of Jishou University(Natural Sciences Edition)    2022, 43 (4): 1-6.   DOI: 10.13438/j.cnki.jdzk.2022.04.001 Abstract （505）      PDF（pc） （335KB）（242）       Knowledge map    Save This paper considers the biased estimators on the parameter components in partially linear varying coefficient model.Based on the Profile least-square approach and Liu estimation method,we propose Profile-Liu estimator and section least-square general Liu estimator for the parametric components.We prove that the Profile-Liu estimation is better than the Profile least-square estimation,and the section least-square general Liu estimation is better than the Profile-Liu estimation under certain conditions. Reference | Related Articles | Metrics | Comments（0）

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Shape Reconstruction Based on Polarization and Coarse Depth Images ZHOU Mengyuan, YANG Fenlin Journal of Jishou University(Natural Sciences Edition)    2022, 43 (4): 20-26.   DOI: 10.13438/j.cnki.jdzk.2022.04.005 Abstract （463）      PDF（pc） （2291KB）（241）       Knowledge map    Save Firstly,the coarse depth image is smoothed by bilateral filtering,which can remove noise well while keeping edge details.Then,the depth information is taken as a prior condition to correct the ambiguity of polarization normals by using a self-defined threshold segmentation method.Finally,a penalty function method with depth constraint as the fitting term and polarization normal constraint as the smooth term is constructed,and the least square method is used to calculate the fusion reconstruction.Four polarization images with different polarization angles and a coarse depth map are selected for experiments.The experimental results show that compared with single mode,the fusion of depth and polarization can recover better surface details and achieve better geometric shape effect. 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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Bounded Φ-Variation Solutions for Retarded Measure Functional Differential Equations LI Baolin, DING Libo Journal of Jishou University(Natural Sciences Edition)    2021, 42 (5): 1-7.   DOI: 10.13438/j.cnki.jdzk.2021.05.001 Abstract （597）      PDF（pc） （326KB）（225）       Knowledge map    Save The existence theorem of bounded Φ-variation solution to retarded measure functional differential equations is established by using Kurzweil integral and the function of bounded Φ-variation. Reference | Related Articles | Metrics | Comments（0）

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Design of Two-Dimensional Photonic Crystal Filter with Kerr Medium LI Zhixin, SUN Jing, WU Cong, SU Muyang Journal of Jishou University(Natural Sciences Edition)    2021, 42 (6): 23-29.   DOI: 10.13438/j.cnki.jdzk.2021.06.004 Abstract （365）      PDF（pc） （3676KB）（224）       Knowledge map    Save Making use of the feature that the permittivity of Kerr medium changes with the incident light, a new-type filter with Kerr medium is designed by controlling the side length of dielectric cylinder of coupled cavity to change the frequency. This filter consists of point defect, micro-cavity, download wave-guide, reflection heterojunction and main wave-guide, and the square GaAs dielectric cylinder is used in coupled cavity. The simulation calculation made through COMSOL Multiphysics shows that the filtering efficiency of this new filter can reach 99.7%. 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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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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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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Numerical Simulation of Flow Characteristics of a DN 1 500 Flue Gas Damper WANG Zhanfeng, FAN Hua Journal of Jishou University(Natural Sciences Edition)    2021, 42 (5): 44-49.   DOI: 10.13438/j.cnki.jdzk.2021.05.008 Abstract （558）      PDF（pc） （6126KB）（219）       Knowledge map    Save Fluent was used to simulate the flow characteristics of a DN 1 500 flue gas damper. Flue gas mass flows and velocity vector  were obtained when the damper pressure drop were 100, 300, 500, 700, 1 000 Pa respectively and the damper opening were 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90° respectively. The influence of pressure drop on flue gas mass flow and flow field were analyzed. Moreover, the piecewise function of flow characteristics corresponding to damper pressure drop of 100 Pa was fitted. The results showed that to have pressure drop less than 100 Pa, the flue gas mass flow with full opening of damper should not exceed 25.05 kg/s. With possible wear, damper should not be operated in narrow angle for long time. It is appropriate to operate the damper in 23°~81° to control the flue gas mass flow. Reference | Related Articles | Metrics | Comments（0）