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Acta Mathematica sinica,English Series 2023年第7期39卷 1332-1350页

作者： si qi wang Fei GUO School of Mathematics Tianjin UniversityTianjin 300354China Tianjin Key Laboratory of Brain-Inspired Intelligence Technology Tianjin 300354China

Two results about the multiplicity of nontrivial periodic bouncing solutions for sublinear damped vibration systems-x=g(t)x+f(t,x) are obtained via the Generalized Nonsmooth Saddle Point Theorem and a technique established by Wu Xian and wang *** of them imply the condition "f≥0" required in some previous papers can be weakened,furthermore,one of them also implies the condition about ■F(t,x)/■t required in some previous papers,such as "|■F(t,x)/■t|=σ_(0)F(t,x)" and "|■F(t,x)/■t|≤C(1+F(t,x))", is unnecessary,where F(t,x):=∫_(0)~xf(t,x)ds,and σ_(0),C are positive constants.

关键词： Damped vibration systems generalized Nonsmooth Saddle Point Theorem sublinear conditions periodic bouncing solutions multiplicity

Generalized Lagrangian Duality in Set-valued Vector Optimization via Abstract Subdifferential

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Acta Mathematicae Applicatae sinica 2022年第2期38卷 337-351页

作者： Yan-fei CHAI San-yang LIU si-qi wang Department of Mathematics Xi'an Polytechnic UniversityXi'an 710048China School of Mathematics and Statistics Xidian UniversityXi'an 710071China College of Transportation Engineering Chang'an UniversityXi'an 710064China

In this paper,we investigate dual problems for nonconvex set-valued vector optimization via abstract *** first introduce a generalized augmented Lagrangian function induced by a coupling vector-valued function for set-valued vector optimization problem and construct related set-valued dual map and dual optimization problem on the basic of weak efficiency,which used by the concepts of supremum and infimum of a *** then establish the weak and strong duality results under this augmented Lagrangian and present sufficient conditions for exact penalization via an abstract subdifferential of the object ***,we define the sub-optimal path related to the dual problem and show that every cluster point of this sub-optimal path is a primal optimal solution of the object optimization *** addition,we consider a generalized vector variational inequality as an application of abstract subdifferential.

关键词： Nonconvex set-valued vector optimization abstract subdifferential generalized augmented Lagrangian duality exact penalization sub-optimal path

The role of fibronectin in multiple sclerosis and the effect of drug delivery across the blood-brain barrier

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Neural Regeneration Research 2023年第10期18卷 2147-2155页

作者： Shuang-Shuang Wei Le Chen Feng-Yuan Yang si-qi wang Peng wang Ningxia Key Laboratory of Craniocerebral Diseases School of Clinical MedicineNingxia Medical UniversityYinchuanNingxia Hui Autonomous RegionChina Ningxia Key Laboratory of Craniocerebral Diseases Ningxia Medical UniversityYinchuanNingxia Hui Autonomous RegionChina

Remyelination failure is one of the main characteristics of multiple sclerosis and is potentially correlated with disease *** research has shown that the extracellular matrix is associated with remyelination failure because remodeling of the matrix often fails in both chronic and progressive multiple *** aggregates are assembled and persistently exist in chronic multiple sclerosis,thus inhibiting *** many advances have been made in the mechanisms and treatment of multiple sclerosis,it remains very difficult for drugs to reach pathological brain tissues;this is due to the complexity of brain structure and function,especially the existence of the blood-brain ***,herein,we review the effects of fibronectin aggregates on multiple sclerosis and the efficacy of different forms of drug delivery across the blood-brain barrier in the treatment of this disease.

关键词： blood-brain barrier brain delivery exosomes extracellular matrix fibronectin aggregates fibronectin intestinal flora multiple sclerosis remyelination failure remyelination

High-rate performance and super long-cycle stability of Na_(3)V_(2)(PO_(4))_(3)cathode material coated by diatomic doped carbon

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Rare Metals 2023年第5期42卷 1570-1582页

作者： Jia Kang Ling Zhu Fei-Yang Teng si-qi wang Yong-Gang Huang Yan-Hong Xiang Zhe Chen Xian-Wen Wu School of Physics and Electromechanical Engineering Jishou UniversityJishou416000China School of Chemistry and Chemical Engineering Jishou UniversityJishou416000China

Na_(3)V_(2)(PO_(4))_(3)is considered as one of the most promising cathodes for sodium ion batteries due to its excellent thermal stability,long cycle life and high energy ***,the inferior intrinsic electronic conductivity which brings about the poor rate capability and cycling performance hinders its commercial ***,the S-N co-doped carbon-coated Na_(3)V_(2)(PO_(4))_(3)(NVP@SNC)has been synthesized to resolve the *** prepared NVP@SNC forms a hierarchical structure assembled with nanosheets,which is in favor of the electrolyte infiltration and shortening the Na^(+)transmission *** lattice defects can be induced in carbon layer by the co-doped elements(S-N),which reduce the Na^(+)diffusion energy barriers and provide adequate Na^(+)migration channels,thus jointly boosting the Na^(+)diffusion ***,the NVP@SNC cathode shows a high reversible capacity with outstanding rate performance and super long-cycle *** discharged at 2.0C,it delivers the capacity near to the theoretical value with a capacity retention of 88.7%after *** if the current is as high as 50.0C,a high capacity of 58.6 mAh·g^(-1)has been released,and41.4 mAh·g^(-1)has been remained after the super long cycling of 4000 *** study is expected to supply a new thought of developing high-performance cathodes by diatomic doping for sodium ion battery.

关键词： Sodium ion battery(siB) Cathode material Na_(3)V_(2)(PO_(4))_(3) Diatomic doping Carbon coating

Analysis of Two Kinds of Stochastic Predator-prey Models with Stage Structure

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Acta Mathematicae Applicatae sinica 2024年

作者： Xin-qi wang Tian-si ZHANG College of Science University of Shanghai for Science and Technology

In this paper, we studied a stochastic predator-prey model of two predators with stage *** constructing a suitable stochastic Lyapunov function, the condition of stationary distribution is verified, and we get the sufficient condition for the model to have ergodic stationary distribution. Then, by using the It?'s formula for the model, the sufficient conditions for the extinction of the predator population are given. Finally,some examples and numerical simulations are illustrated to verify the theoretical results.

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Renewable conversion of coal gangue to 13-X molecular sieve for Cd^(2+)-containing wastewater adsorption performance

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Rare Metals 2024年第2期43卷 702-710页

作者： Le Kang si-Fan Liu Da-Wei Yi Kai wang Hui-Ling Du Hao-qi Huang Peng Chen College of Materials Science and Engineering Xi’an University of Science and TechnologyXi’an710054China School of Electrical Engineering Weihai Innovation Research InstituteQingdao UniversityQingdao266000China School of Metallurgy Northeastern UniversityShenyang110819China School of Materials and Chemical Engineering Tongren UniversityTongren554300China

Using coal gangue(CG)as raw material,a new type of all solid-waste-based 13-X molecular sieve material was controllably prepared by alkali fusion-hydrothermal *** synthetic molecular sieve was used as a solid adsorbent to treat Cd^(2+)-containing wastewater,and its adsorption behavior on Cd^(2+)in aqueous solution was studied and *** microstructure and morphology of the molecular sieve were investigated by X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM)and specific surface area *** results show that the synthesized 13-X molecular sieve has higher Brunauer–Emmett–Teller(BET)specific surface area with higher crystallinity and higher adsorption capacity for the heavy metal Cd^(2+).The adsorption process of Cd^(2+)by molecular sieve conforms to the Langmuir isotherm adsorption equation and Lagergren pseudo-second-order rate *** with thermodynamic calculation,it can be concluded that the adsorption process is physically monolayer,spontaneous and *** this study,a low-cost and naturally available synthesis method of 13-X molecular sieve is *** with its adsorption mechanism for Cd^(2+),it provides a feasible and general method for removing heavy metal ions from coal gangue and also provides a new way for the utilization of coal gangue with high added value.

关键词： Coal gangue Hydrothermal synthesis 13-X molecular sieve Adsorption Wastewater containing Cd^(2+)

Hemin-functionalized polypyrrole/paper-derived biochar electrocatalysts:Enhanced sensor platforms for H2O2

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Progress in Natural Science:Materials International 2024年第2期34卷 280-289页

作者： Yuhang Jiang Tianshuang Bao Xiangchuan Zhao qi wang Yue Cao Jun Cao Xingxiang Ji Weimeng si School of Materials Science and Engineering Shandong University of Technology State Key Laboratory of Biobased Material and Green Papermaking Qilu University of Technology (Shandong Academy of Sciences)

As a H2O2electrochemical biomimetic enzyme sensor,the stability,repeatability and sensitivity of hemin-based composites are closely connected with the loading of hemin on high-performance ***,polypyrrole/paper-derived carbon（PPy/PC） nanocomposite was used for the construction of a hemin-based non-enzymatic sensor to detect *** the poplar wood is used to obtain crude cellulose through a straightforward papermaking *** crude cellulose is then subjected to pyrolysis to yield the desired paper-based carbon *** hemin-decorated PPy/PC was demonstrated possessing remarkable electrocatalytic activity for H2O2reduction,and the possible mechanism of the reactions was *** electrochemical sensor,utilizing the HPPy/PC composite,achieved a low detection limit of 30 nM,along with enhanced selectivity and stability under optimized *** favorable results observed can primarily be attributed to the superior electrochemical performance of PPy/PC,as well as its unique 3D interconnected *** structure effectively impedes the self-dimerization of hemin,thereby ensuring the generation of active catalytic species.

关键词： Biochar H2O2 sensing Hemin Paper-based carbon materials Paper-making process

dECM restores macrophage immune homeostasis and alleviates iron overload to promote DTPI healing

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Regenerative Biomaterials 2024年第2期3卷 100-113页

作者： Ju Zhang Ruijuan si Yu Gao Hui Shan qi Su Zujian Feng Pingsheng Huang Deling Kong Weiwei wang Tianjin Key Laboratory of Biomaterial Research Institute of Biomedical EngineeringChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjin300192China School of Nursing Qingdao UniversityNingde RoadShinan DistrictQingdaoShandong266071China Cancer Hospital of Tianjin Medical University North Huanhu West RoadTianjinChina The Affliated Hospital of qingdao University 16 Jjiangsu RoadShinan DistrictQingdaoChina 5NankaiUniver aniin300071.China

Due to its highly insidious and rapid progression,deep tissue pressure injury(DTPI)is a clinical *** previous study found that DTPI may be a skeletal muscle injury dominated by macrophage immune dysfunction due to excessive iron *** extracellular matrix(dECM)hydrogel promotes skeletal muscle injury ***,its role in po-larizing macrophages and regulating iron metabolism in DTPI remains ***,porcine dECM hydrogel was prepared,and its therapeutic function and mechanism in repairing DTPI were *** stimulus of dECM hydrogel toward RAW264.7 cells resulted in a significantly higher percentage of CD2o6+macrophages and notably decreased intracellular divalent iron *** mice DTPI model,dECM hydrogel treatment promoted M1 to M2 macrophage conversion,improved iron metabolism and reduced oxidative stress in the early stage of *** the remodeling phase,the dECM hydrogel remarkably enhanced revascularization and accelerated skeletal muscle ***,the immunomodulation of dEcM hydrogels in vivo was mainly involved in the P13k/Akt signaling pathway,as revealed by GO and KEGG pathway analysis,which may ameliorate the iron deposition and promote the healing of *** findings indicate that dECM hydrogel is promising in skeletal muscle repair,inflammation resolution and tissue injury healing by effectively restoring macrophage immune homeostasis and normalizing iron metabolism.

关键词： Deep tissue pressure injury hydrogel immunomodulation tissue repair

Self organizing optimization and phase transition in reinforcement learning minority game system

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Frontiers of physics 2024年第4期19卷 297-309页

作者： si-Ping Zhang Jia-qi Dong Hui-Yu Zhang Yi-Xuan Lü Jue wang Zi-Gang Huang Key Laboratory of Biomedical Information Engineering of Ministry of Education Key Laboratory of Neuro-informatics&Rehabilitation Engineering of Ministry of Civil Affairsand Institute of Health and Rehabilitation ScienceSchool of Life Science and TechnologyXi’an Jiaotong UniversityXi’an 710049China Lanzhou Center for Theoretical Physics and Key Laboratory of Theoretical Physics of Gansu Province Lanzhou UniversityLanzhou 730000China

Whether the complex game system composed of a large number of artificial intelligence(AI)agents empowered with reinforcement learning can produce extremely favorable collective behaviors just through the way of agent self-exploration is a matter of practical *** this paper,we address this question by combining the typical theoretical model of resource allocation system,the minority game model,with reinforcement *** individual participating in the game is set to have a certain degree of intelligence based on reinforcement learning *** particular,we demonstrate that as AI agents gradually becomes familiar with the unknown environment and tries to provide optimal actions to maximize payoff,the whole system continues to approach the optimal state under certain parameter combinations,herding is effectively suppressed by an oscillating collective behavior which is a self-organizing pattern without any external *** interesting phenomenon is that a first-order phase transition is revealed based on some numerical results in our multi-agents system with reinforcement *** order to further understand the dynamic behavior of agent learning,we define and analyze the conversion path of belief mode,and find that the self-organizing condensation of belief modes appeared for the given trial and error rates in the AI ***,we provide a detection method for period-two oscillation collective pattern emergence based on the Kullback–Leibler divergence and give the parameter position where the period-two appears.

关键词： oscillatory evolution collective behaviors phase transition reinforcement learning minority game

Correlating dynamic relaxation and viscoelasticity in metallic glasses

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 81-90页

作者： GuangHui Xing qi Hao Fan Zhu Yun-Jiang wang Yong Yang Hidemi Kato Eloi Pineda si Lan JiChao qiao School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi'an 710072China State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China Department of Mechanical Engineering College of EngineeringCity University of Hong KongHong Kong 999077China Department of Materials Science and Engineering College of EngineeringCity University of Hong KongHong Kong 999077China Institute for Materials Research Tohoku UniversitySendai 980-8577Japan Department of Physics Institute of Energy TechnologiesUniversitat Politècnica de CatalunyaBarceona 9Spain School of Material Science and Engineering Herbert Gleiter Institute of NanoscienceNanjing University of Science and Technology.Nanjing 210094China State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Northwestern Polytechnical UniversityXi'an 710072China

Relaxation dynamics,essential for the structural evolution of non-equilibrium systems like glassy materials,remain ***,we explore relaxation dynamics and viscoelastic properties in three types of metallic glasses with distinctβrelaxation *** systems with significantβrelaxation,stress relaxation and creep experiments reveal a transition from two-step to one-step relaxation with rising ***,such a phenomenon is absent in systems with weakerβ*** model the two-step relaxation process using a double Kohlrausch-Williams-Watts equation,and the obtained relaxation times elegantly adhere to the Arrhenius *** combining fitted activation energies with theoretical analysis,we conclusively attribute these relaxation processes toβrelaxation andαrelaxation,***,we analyze the relaxation time spectra of two processes and establish a comprehensive picture linking dynamic relaxation with *** study provides new strategies for probing the complex relaxation behaviors of glasses from the perspective of viscoelasticity.

关键词： creep relaxation glasses