Journal of Jishou University(Natural Sciences Edition)

Relationship Between Continuous Posets Defined by the Cut Operator

LIANG Jing

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 1-4.

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To investigate the relationships among various types of continuous posets defined by the cut operator,this paper uses the construction of Frink ideals to prove that a poset L is s^*₂-supercontinuous if and only if it is F-continuous and s₁-continuous.Furthermore,the equivalence of three descriptions is established:L is s^*₂-superalgebraic,L is s₁-continuous and s₂-superalgebraic,and L is L-algebraic and s₁-continuous.

Empirical Likelihood Inference for Semiparametric Varying-Coefficient Models with Fixed Effects Under Missing Data

WANG Yiheng, HE Bangqiang

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 5-10.

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The statistical inference problem for semiparametric varying coefficient models with fixed effects under missing data is addressed.The varying coefficient functions are handled through local polynomial methods,and fixed effects are eliminated through instrumental variables.The issue of missing data is resolved by employing the Kaplan-Meier product limit estimator,and a semiparametric empirical likelihood ratio statistic is constructed.In appropriate regularity conditions,the proposed estimators are proved to be consistent and asymptotically normal,and the empirical likelihood ratio statistic is shown to follow the standard chi-squared distribution.Monte Carlo simulations reveal that compared with conventional complete-case analysis,the empirical likelihood inference can effectively reduce bias and enhance estimation efficiency.

Generalization of Distributed Huber Regression Algorithms with Uniformly Ergodic Markov Chain Samples

LI Ke, JIANG Hongwei

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 11-18.

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This paper investigates the generalization performance of distributed Huber regression with samples generated from uniformly ergodic Markov chains.We first construct a distributed Huber regression algorithm applicable to uniformly ergodic Markov chain samples.Relying on statistical learning theory,we further derive the convergence rates and generalization bounds for the proposed distributed Huber regression with Markov chain sampling.Theoretical proofs demonstrate that the distributed Huber regression algorithm achieves a fast convergence rate even in the non-independent and identically distributed (non-i.i.d.) sample setting.

AODV Routing Protocol Based on Multi-Dimensional Metrics and Genetic Algorithm

MA Haowei, TANG Zhijun, DONG Shanshan

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 19-28.

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Aiming at the problems of fragile paths and short network lifetime caused by the traditional Ad Hoc On-Demand Distance Vector (AODV) routing protocol,which only takes the minimum hop count as the routing decision criterion in Mobile Ad Hoc Network (MANET),this paper proposes an improved AODV Protocol Based on Multi-Dimensional Metric Genetic Algorithm (MOGA-AODV).Different from the conventional single routing metric mode,the proposed protocol constructs a composite fitness function integrating node residual energy,link congestion degree and link failure probability,and adopts the genetic algorithm for path optimization to realize systematic optimization of route selection.Simulation results show that compared with the traditional AODV and AODV-M protocols,MOGA-AODV achieves substantial improvements in average end-to-end delay,packet delivery ratio and routing control overhead.It can effectively enhance network stability and extend network lifetime,and is applicable in dynamic and complex MANET scenarios.

Dynamic Evaluation Model of Question Difficulty Based on User Behavioral Data

WANG Nan, TANG Runqi, XIA Yuanyuan, HE Yingsheng

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 29-34.

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To address the issue of inaccurate matching question difficulty to user abilities in online assessments,a dynamic question difficulty evaluation model based on user behavioral data was constructed.The evaluation model relies on a two-parameter logistic model and maximum likelihood estimation to obtain user ability parameters,introduces a response efficiency factor to describe differences in the response process,constructs a weighted average of user comprehensive abilities,and,based on a unified range of comprehensive abilities and global question difficulty values,utilizes the probability function calculation theory of the two-parameter logistic model to obtain the question difficulty level through probability,thus achieving dynamic estimation of question difficulty.Comparative experiment results show that the question difficulty level estimated by the constructed evaluation model is consistent with the actual question difficulty level.Ablation experiments show that after introducing the response efficiency factor,the absolute error of the evaluation model is significantly reduced,and the overall evaluation performance is significantly improved.

Effect of Pore Geometry on Monolithic Two-Dimensional Hexagonal Lattice Structures

CHEN Yi, KONG Peng

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 35-42.

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To reveal the influence mechanism of hole geometry on the bandgap characteristics of two-dimensional porous phononic crystals,a parametrically describable hole geometric model was constructed based on Fourier coefficients,and the band structures corresponding to different geometric models were calculated through finite element method.The effects of low-order Fourier coefficients (c₁,c₂),the dimensionless minimum ligament width (h/L),and high-order Fourier coefficients (c₃,c₄) on the relative bandgap width were systematically analyzed.The results indicate that h/L and c1 are the two core parameters determining the relative bandgap width;decreasing h/L and increasing c1 can both effectively broaden the relative bandgap.Low-order Fourier coefficients c₁ primarily regulate the overall hole morphology and play a decisive role in tuning the relative bandgap width,while high-order Fourier coefficients _c3 and c₄ mainly modify the local detailed features of the hole and have a limited effect on the relative bandgap width.This suggests a clear intrinsic correlation between hole shape parameters and the bandgap characteristics of phononic crystals.

Compaction Characteristics of Cement-Amended Granitic Residual Soil Based on Micro-Structural Evolution

XUE Wenzhuo, LIU Xinyu, DENG Zongwei

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 43-50.

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To investigate the effects of cement content on the compaction characteristics and microstructural evolution of granite residual soil,this study used granite residual soil from Yiyang,Hunan Province,and conducted compaction tests,scanning electron microscopy (SEM) image analysis,and energy dispersive spectrometer (EDS) spectroscopy with cement contents of 0%,3%,5%,7%,and 9%.The experiments revealed that the modifying effect of cement does not continue to increase as the cement content rises.Microscopic tests further revealed the underlying mechanisms within the soil.SEM observations showed that as the hydration reaction progressed,the microscopic porosity decreased significantly from 14.16% in its natural state to 6.00%;EDS spectroscopy results showed that the mass fraction of Ca in the soil increased significantly from 0% to 10.02%,indicating enhanced cement hydration.The formation of hydration products promoted pore filling and led to a redistribution of the elemental composition in the specimens.In engineering practice,it is recommended that the admixture dosage for conventional subgrade projects be controlled at around 5%;if higher compaction requirements are needed for specific sections,a dosage of 7% may be selected,but this must be accompanied by strict crack-prevention and curing measures.

Lamiaceae Plant Diversity in Dehang Geological Park,Hunan Province

ZHANG Yi, SU Siqi, XIANG Xiaomei, WANG Lu, LIU Bing, WU Ting, CHEN Gongxi

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 51-62.

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Through field surveys,specimen identification,morphological observations,and landscape classification,this study systematically investigated the characteristics of Lamiaceae plant diversity in Dehang Geological Park,Hunan Province.Results showed that a total of 53 species belonging to 23 genera of Lamiaceae were recorded in Dehang,with Scutellaria and Salvia as dominant genera.The floristic composition was complex,showing predominantly temperate affinities at the generic level and mainly Chinese endemics at the species level,with high proportions of shared species in regions of central China,southwest China,and eastern China.Leaf shape and phyllotaxy exhibited typical Lamiaceae features,while leaf margin types,texture,and trichome types were diverse,with serrate or crenate margins,herbaceous leaves,and both surfaces covered with hairs being predominant—important phenotypic adaptations to subtropical mountain habitats.Inflorescences were primarily racemose,mostly axillary,flowering concentrated from July to August,and fruiting from August to October,indicating strong adaptation of reproductive traits to local hydrothermal conditions and pollination environments.Lamiaceae plants occurred across 11 landscape types,predominantly in the Hengxia slope and floodplain landscapes,with sparse distribution in arid rock faces and cliff-top terraces.Overall,Lamiaceae in Dehang exhibit rich species diversity,unique floristic composition,highly adapted reproductive strategies,and distinct landscape distribution patterns.

Urticaceae Plant Diversity in Dehang Scenic Area,Hunan Province

SU Siqi, ZHANG Yi, WU Ting, WANG Lu, LIU Bing, XIANG Xiaomei, CHEN Gongxi

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 63-70.

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Through field surveys,specimen identification,and literature review,this study investigated the species composition,floristic geographical components,landscape distribution,and functional trait diversity of Urticaceae plants in Dehang Scenic Area,Hunan Province.Results showed that a total of 50 species belonging to 13 genera were recorded in the area,with distinct hierarchical patterns in genus and species composition,dominated by Elatostema (13 species),Pilea (12 species),and Boehmeria (8 species).The floristic geographical composition was complex and diverse:at the generic level,six distribution types and one variant were identified,primarily characterized by pantropical and tropical Asia to tropical Africa distributions;at the species level,six distribution types and two variants were found,with Chinese endemism and East Asian distributions being dominant,reflecting a distinct subtropical transitional floristic character.Plants of the Urticaceae family are distributed in 11 of the 13 landscape types,mainly concentrated in moist,water-adjacent areas such as riverbank slopes and floodplains.Functional traits showed clear differentiation:nutritional traits were predominantly characterized by alternate leaves,medium-sized leaves,herbaceous leaf texture,and pubescent leaf surfaces on both sides;reproductive traits were mainly represented by umbellate clusters and corymbose inflorescences,the flowering period was concentrated from March to October,and the fruiting period was concentrated from August to October.These findings indicate that Urticaceae plants in Dehang Scenic Area are rich in species,possess unique floristic characteristics,exhibit diverse landscape distributions,and show strong adaptation between functional traits and habitats,warranting scientific conservation and rational utilization.

New Distribution Records of Two Reptile Species in Guizhou Province—With a Taxonomic Revision of the Original Lycodon synaptor

WU Jianpu, HUANG Jie, RAN Jingcheng, ZHANG Xianhu, WANG Yun, YANG Jinyou, JIANG Wansheng

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 71-77.

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In August 2025,specimens of the genus Lycodon and Hemiphyllodactylus were collected from Pu'an County,Qianxinan Buyi and Miao Autonomous Prefecture,Guizhou Province.Based on morphological comparison and phylogenetic analysis,the two specimens were identified as Lycodon yunnanensis and Hemiphyllodactylus yunnanensis,respectively,thereby confirming the occurrence of the two species within Guizhou Province.Additionally,the previously recorded distribution of Lycodon synaptor in Guizhou was revised to Lycodon yunnanensis.

Research Progress on Lycopene in Alleviating Social Deficits in Autism Spectrum Disorder

GUO Yuqi, YANG Lu, MENG Yuhan, LIU Suhui, LIU Yan, LI Hui

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 78-83.

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Autism Spectrum Disorder (ASD) is characterized primarily by social deficits,and its development is closely associated with central nervous system inflammation,gut-brain axis dysregulation,and oxidative stress.Lycopene,a lipid-soluble carotenoid capable of crossing the blood-brain barrier,possesses dual biological activities—anti-inflammatory and antioxidant.Animal studies have demonstrated that lycopene can inhibit NLRP3 inflammasome activation,downregulate the expression of multiple inflammatory factors such as IL-1β,IL-8,NF-κB,IL-18,and TNF-α,reduce inflammatory damage,and thereby alleviate social deficits and repetitive behaviors.Furthermore,lycopene has shown promising neuroprotective effects in neurodegenerative diseases such as Alzheimer's disease and epilepsy.However,current research remains limited to animal models,often using highly purified,high-dose formulations of lycopene.The therapeutic effects observed under these conditions cannot be directly equated to those achievable through regular dietary intake,and interspecies differences must also be considered.Nevertheless,incorporating lycopene into a balanced diet may still offer potential protective benefits for brain health.Future research should focus on mechanistic studies using organoids and human cells,as well as rigorous clinical trials to establish the safety and efficacy of lycopene in ASD patients,ultimately identifying optimal intervention strategies.

Effect of Generative Artificial Intelligence on Graduate Students' Research and Innovation Ability:A Chain Mediating Model

WANG Xingxin

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 84-89.

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To explore the effect of generative artificial intelligence on graduate students' research and innovation ability and its underlying mechanisms,a chain mediating model was constructed in which generative artificial intelligence impacts graduate students' research and innovation ability through research efficacy and self-directed learning motivations.A total of 470 valid questionnaires were collected from university postgraduate students,and structural equation modeling was employed to empirically analyze the data.The results showed that generative artificial intelligence had a significant positive effect on research and innovation ability of graduate students;research efficacy and self-directed learning motivations played significant separate and chain mediating effect between generative artificial intelligence and graduate students' research and innovation ability.

Reading Promotion Strategies for Red Cultural Resources in University Libraries of Western Hunan Based on "Three Comprehensive Education Initiatives"

WANG Yue'e, LIU Ao, TANG Shi, WU Fangling

Journal of Jishou University(Natural Sciences Edition), 2026, 47(4): 90-96.

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Based on online survey and field investigations conducted at five university libraries in western Hunan,this study analyzes the current status and existing challenges of promoting red cultural resources in university libraries in the framework of "Three Comprehensive Educaton Initiatives".It proposes optimization strategies including restructuring top-level design,establishing an education operation mechanism,innovating resource service models,and building a scientific and effective evaluation system.These strategies can effectively enhance reading promotion involving red cultural resources and improve cultural education outcomes.These strategies can also strengthen students' cultural identity and value orientation,support innovation capabilities and overall competence among college students.They can further promote high-quality talent cultivation in higher education institutions,and reinforce the consciousness of the Chinese nation as a community.

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