Journal of Jishou University(Natural Sciences Edition)

A Stochastic Financial Investment Model with Saturation Incidence

LIU Juan, LI Yun

Journal of Jishou University(Natural Sciences Edition), 2025, 46(3): 1-4.

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On the basis of deterministic financial investment model,a stochastic financial investment model with saturation rate was established by using the dynamic system compartment theory.The existence and uniqueness of positive solutions of the model were discussed by using the theory of stochastic differential equations,and the sufficiency condition for the disappearance of investment fund was obtained by using the It formula and the law of strong numbers.The research results indicate that uncertain factors in the investment environment have a significant impact on the financial market.

Some Results on Maximal Subgroups and Admissible Subgroups

ZHAO Jia, HUANG Xiao

Journal of Jishou University(Natural Sciences Edition), 2025, 46(3): 5-8.

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Starting from solvable groups and combining the definitions of maximal subgroups and admissible subgroups,this paper investigats the quantitative relationship between maximal subgroups and admissible subgroups in groups of order p,groups of order pq,finite cyclic groups,simple groups A₅ and the 5th-order symmetric group S₅.

Multi-Attribute Group Decision Making Algorithm of Weighted Probabilistic Hesitant Fuzzy Sets

ZHU Guocheng, CHEN Liqun

Journal of Jishou University(Natural Sciences Edition), 2025, 46(3): 9-20.

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In order to make the comprehensive evaluation factor value of each scheme contain more evaluation information,a three-factor decision algorithm is designed.For each evaluation attribute,the comprehensive weights of other evaluation experts are calculated in turn according to the scores of authoritative evaluation experts.According to the evaluation information given by the evaluation experts with different comprehensive weights,the true function value,the virtual function value and the distance calculation formulas of two weighted probabilistic hesitant fuzzy elements are given respectively.Based on the calculation results of truth-value function and virtual-value function,entropy method is used to obtain the objective weights of evaluation attributes.On the evaluation attributes with different comprehensive weights,the comprehensive evaluation factor values of each scheme are obtained by using the truth function values,virtual function values and distance calculation results,and the schemes are ranked according to the comprehensive evaluation factor values.The feasibility of the decision algorithm is verified by a numerical example.

Normal-Like Curves According to the ED-Frame in E41

HU Na, LIU Haoran

Journal of Jishou University(Natural Sciences Edition), 2025, 46(3): 21-29.

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Based on the extended Darboux (ED)-framework,the normal-like curves under a specific ED-frame in E4 is defined.The concept of normal curves is extended to E41,and the characteristics of normal-like curves are analyzed in depth.Three equations relating the curvature of normal curves on hypersurfaces M are derived.These equations serve as the necessary and sufficient conditions for normal-like curves in E41.By applying the ED-frame,we define the E-expressions in E41 and give concrete application examples.

Blind Spectrum Sensing Method Based on Covariance Matrix Diagonal-to-Nondiagonal Ratio

ZHANG Song, WANG Xuming, PAN Xiaoping, LEI Kejun, YANG Xi

Journal of Jishou University(Natural Sciences Edition), 2025, 46(3): 30-36.

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Aiming at the limitations of existing covariance matrix-based blind spectrum sensing algorithms in insufficient utilization of multi-antenna signal correlation and degraded detection performance under low signal-to-noise ratio (SNR) conditions,this paper proposes a fully blind spectrum sensing algorithm based on covariance diagonal-to-nondiagonal ratio detection (CDNRD).The algorithm constructs a detection statistic as the ratio of the sum of the non-diagonal elements of the sample covariance matrix to the total energy of the received signals.By jointly utilizing the amplitude and phase information of the signals,it fully exploits the spatial correlation characteristics of multi-antenna signals.Simulation results demonstrate that in scenarios with low SNR (-15 dB) and strong correlation (correlation coefficient ρ=0.9),the detection probability of the CDNRD algorithm significantly outperforms existing methods,including covariance absolute value detection (CAVD),maximum-minimum eigenvalue detection (MMED),gini index detection (GID),and energy detection (ED).Moreover,the algorithm exhibits robustness and stability across varying sample sizes,antenna numbers,and correlation coefficients.

Influence of THM Coupling on Energy Storage Efficiency of CAESA System

ZHOU Qian, LI Yi1, 2, ZHANG Guijin, HUANG Leqing

Journal of Jishou University(Natural Sciences Edition), 2025, 46(3): 37-45.

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In order to explore the influence of rock mechanical response of reservoir on energy storage efficiency of compressed air energy storage in aquifer (CAESA) system,the program T2WELL/EOS3-FLAC3D numerical simulation is used to analyze the energy storage efficiency of the thermal-hydrologic coupled and thermal-hydrologic coupled CAESA system under different injection temperature,permeability,injection-production rate.The results show that the rock mechanical response generated by the system operation will accelerate the energy exchange in the system,and the energy storage efficiency of the system will decrease faster when the rock mechanical process is considered.The higher the injection temperature,the weaker the influence of rock mechanical response on energy storage efficiency.The mechanical response of the reservoir to the system energy storage efficiency exhibits a permeability threshold effect under the rated energy storage scale.The greater the injection and production rate,the stronger the influence of rock mechanical response on the energy storage efficiency of the system.

Preparation of a Fe₃O₄@SiO₂@Fe-MIL-101 for the Adsorption Removal of Fluoride in Zinc Sulfate Electrolyte

LIAO Jia, WANG Chunmei, LI Fei, YANG Chengcheng, GUO Xianyu, TAN Wentao, LI Hui

Journal of Jishou University(Natural Sciences Edition), 2025, 46(3): 46-61.

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To remove the fluoride in zinc sulfate electrolyte to an appropriate level,mitigate environmental fluoride pollution,and drive the development of the hydrometallurgy industry of zinc,a novel Fe₃O₄@SiO₂@Fe-MIL-101 magnetic composite material was successfully synthesized via the one-pot method.Preparation conditions were optimized and structural characterization of this material conducted using FTIR,SEM,EDS,XRD and Hysteresis analysis.The results show that this composite exhibits a more rapid fluoride adsorption dynamics and a higher fluoride adsorption capacity (18.34 mg/g) and its adsorption behavior fitted for the first order dynamic model and the Freundlich isotherm model.The adsorption of fluorine by this composite is mainly physical adsorption according to the mean adsorption energy (1.216 kJ/mol).The interfering ions co-existed in fluoride-containing solutions,like HCO-3,NO- and Cl-,have a significant effect on fluorine adsorption.This composite has also been proved with magnetism,higher adsorption selectivity and satisfactory reusability.When this composite is employed as an adsorbent for adsorption removing fluoride in zinc sulfate electrolyte,it exhibits higher pH-dependent behavior as well as high fluoride removal efficiency at pH 6.5.

Characterization and Phylogenetic Analysis of the Chloroplast Genome of the Toxic Medicinal Plant Illicium simonsii

GAO Tiantian, MAO Jiuyang, LI Haifeng, ZHANG Dequan, 3

Journal of Jishou University(Natural Sciences Edition), 2025, 46(3): 62-74.

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In order to explore the chloroplast genome characteristics of the toxic medicinal plant Illicium simonsii and analyze its relationships with other species of the Illicium,this study used next-generation sequencing (NGS) technology to perform high-throughput sequencing for leaf material of Illicium simonsii,and obtained the complete chloroplast genome after assembly and annotation,which was analyzed using bioinformatics.Meanwhile,phylogenetic tree of Illicium simonsii and the related species in the Illicium genus were constructed based on chloroplast genomes and coding sequences (CDS).The result showed that the full length of the Illicium simonsii chloroplast genome was 143 012 bp,which encoded 112 genes,including 78 protein-coding genes,29 tRNA genes,4 rRNA genes,and 1 pseudogene,with a total GC molar fraction of 39.1%;there were a total of 100 simple sequence repeats (SSRs) in the chloroplast genome of Illicium simonsii,with the largest number of mono-nucleotides.The degree of chloroplast genomic variation in Illicium plants all showed higher LSC and SSC regions than IRs regions,and the five highly variable regions were trnK-UUU-rps16，accD-psal，rpl20-clpP1，ycf1，atpF;Within the genus Illicium,Illicium simonsii was most closely related to Illicium burmanicum,with a support rate as high as 100%,and both Illicium simonsii and Illicium verum belong to the same monophyletic clade,exhibiting closer phylogenetic affinity.

Optimization of Deproteinization Process of Polysaccharides from Polygonatum odoratum Based on Response Surface Methodology

ZHANG Yang, XIE Fei, CHEN Shuting, DU Laihong, HU Kemei, ZOU Bin, WANG Qi, CHENG Jiang

Journal of Jishou University(Natural Sciences Edition), 2025, 46(3): 75-81.

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Using Polygonatum odoratum (Mill.) Druce powder as the raw material,this study investigated the effects of chloroform to butyl alcohol volume ratio,Sevage reagent to polysaccharide sample volume ratio,and shaking time on polysaccharide retention rate and protein removal rate.Based on single factor experiments,the protein removal process for polysaccharides was optimized using response surface methodology.The optimal conditions were determined as follows:V(chloroform)∶V(butyl alcohol)=4∶1,V(Sevage reagent)∶V(Polysaccharide sample)= 1∶2,and shaking time of 30 min.Under these conditions,the polysaccharide retention rate reached 76.01%,and the protein removal rate was 28.73%.This optimized protocol provides a reliable approach for efficiently removing proteins while preserving polysaccharide integrity during the purification of Polygonatum odoratum (Mill.) Druce polysaccharides.

Optimization of Extraction Process and Functional Properties of Protein from Lilium lancifolium Ker Gawl.

HUANG Shuwei, LYU Huiting, ZHAO Jing, XIANG Yu, A Runa, CHENG Jiang, YAO Shufeng

Journal of Jishou University(Natural Sciences Edition), 2025, 46(3): 82-88.

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The effects of solid-liquid ratio,extraction time and extraction temperature on the yield of total protein were investigated by using ultrasonic-assisted alkali extraction and acid precipitation extraction method with Lilium lancifolium bulb powder as raw material.The extraction process of total protein was optimized by L9(33) orthogonal experiment;and on this basis,the water-holding capacity and oil-holding capacity of total protein extract were determined.The results of extraction process optimization showed that the optimal extraction conditions of total protein in Lilium lancifolium bulbs were as follows:solid-liquid ratio 1∶80 (g∶mL),extraction time 40 min,extraction temperature 45 ℃.Under the optimal extraction conditions,the total protein yield was 1.30%.The results of water-holding capacity and oil-holding capacity showed that the water-holding capacity of the total protein extract was 3.69 g/g,and the oil-holding capacity was 7.39 g/g.It can be concluded that the protein has good water-holding capacity and oil-holding capacity,so that it can be used as a natural adhesive of plant-based food and natural green moisturizing component,which can expand the high-value application of medicinal and edible homologous Chinese herbal medicines.

Optimizing the High-Quality Development of Winter Sports in China:A Study Based on the Analysis of the Development Factors of German Winter Sports

LEI Zhenzhou, HE Jing, LUO Shuaicheng

Journal of Jishou University(Natural Sciences Edition), 2025, 46(3): 89-96.

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The long-term top-level performance of German winter sports is due to the country's emphasis on winter sports,as evidenced by the following:a clearly defined and efficient organizational management;a wide range of funding support channels;well-developed winter sports facilities;active promotion of mass participation and youth sports;build a diversified talent training system;close integration of practical training and scientific research;and continuous improvement of coaches' teaching skills.Based on the development experience of German winter sports,this paper proposes an optimized path for the high-quality development of winter sports in China:deepen management system reform and expand funding support channels;improve the selection and training model and strengthen the integration of sports,education,and science;and enhance the management level of coaches and support scientific research to assist practical training.

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