检索结果-南通市图书馆

Speech by President li xiaolin at the opening ceremony of the Third China-U.S. Sub-National Legislatures Cooperation Forum

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Voice of Friendship 2018年第4期 30-31页

作者： li xiaolin 不详

Respected President Lakis,Respected legislative leaders of provinces and states,Ladies, gentlemen and friends,Good morning. Now it is the time of the year when autumn changes into winter and the weather gradually cool... 详细信息

关键词： Sub-National Legislatures Cooperation President li xiaolin Third China-U.S

CPAFFC Vice President li xiaolin Leads Delegation to Pakistan and India

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Voice of Friendship 2007年第3期 12-14页

作者： li Sanghua

At the invitation of the Pak-China Friendship Association (PCFA) Northwest Frontier Province (NWFP) and the Indian Association of Friendships with Foreign Countries (IAFFC), a CPAFFC delegation headed by its vice pres... 详细信息

关键词： headed invitation Pakistan delegation Frontier vis

PI3K/AKT signaling and neuroprotection in ischemic stroke:molecular mechanisms and therapeutic perspectives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2758-2775页

作者： Tianlong liu xiaolin li Xiaowei Zhou Wei Chen Aidong Wen Minna liu Yi Ding Department of Pharmacy Xijing HospitalFourth Military Medical UniversityXi’anShaanxi ProvinceChina Department of Pharmacy The 940 Hospital of Joint Logistics Support Forces of Chinese PLALanzhouGansu ProvinceChina Department of Pharmacy The 944 Hospital of Joint Logistics Support Forces of Chinese PLAJiuquanGansu ProvinceChina Department of Nephrology The 940 Hospital of Joint Logistics Support Forces of Chinese PLALanzhouGansu ProvinceChina

It has been reported that the PI3K/AKT signaling pathway plays a key role in the pathogenesis of ischemic *** a result,the development of drugs targeting the PI3K/AKT signaling pathway has attracted increasing attention from *** article reviews the pathological mechanisms and advancements in research related to the signaling pathways in ischemic stroke,with a focus on the PI3K/AKT signaling *** key findings include the following:(1)The complex pathological mechanisms of ischemic stroke can be categorized into five major types:excitatory amino acid toxicity,Ca^(2+)overload,inflammatory response,oxidative stress,and apoptosis.(2)The PI3K/AKT-mediated signaling pathway is closely associated with the occurrence and progression of ischemic stroke,which primarily involves the NF-κB,NRF2,BCL-2,mTOR,and endothelial NOS signaling pathways.(3)Natural products,including flavonoids,quinones,alkaloids,phenylpropanoids,phenols,terpenoids,and iridoids,show great potential as candidate substances for the development of innovative anti-stroke medications.(4)Recently,novel therapeutic techniques,such as electroacupuncture and mesenchymal stem cell therapy,have demonstrated the potential to improve stroke outcomes by activating the PI3K/AKT signaling pathway,providing new possibilities for the treatment and rehabilitation of patients with ischemic *** investigations should focus on the direct regulatory mechanisms of drugs targeting the PI3K/AKT signaling pathway and their clinical translation to develop innovative treatment strategies for ischemic stroke.

关键词： apoptosis autophagy inflammation ischemic stroke neuroprotection oxidative stress pathogenesis phosphatidylinositol 3-kinase protein kinase B therapeutics

维普期刊数据库

THEORETICAL ANALYSIS OF THE REPRODUCING KERNEL GRADIENT SMOOTHING INTEGRATION TECHNIQUE IN GALERKIN MESHLESS METHODS

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2023年第3期41卷 501-524页

作者： xiaolin li School of Mathematical Sciences Chongqing Normal UniversityChongqing 400047China

Numerical integration poses greater challenges in Galerkin meshless methods than finite element methods owing to the non-polynomial feature of meshless shape *** reproducing kernel gradient smoothing integration(RKGSI)is one of the optimal numerical integration techniques in Galerkin meshless methods with minimum integration *** this paper,properties,quadrature rules and the effect of the RKGSI on meshless methods are *** existence,uniqueness and error estimates of the solution of Galerkin meshless methods under numerical integration with the RKGSI are established.A procedure on how to choose quadrature rules to recover the optimal convergence rate is presented.

关键词： Galerkin meshless method Numerical integration Quadrature rule Error estimates Element-free Galerkin method Degree of precision

Meshless acoustic analysis using a weakly singular Burton-Miller boundary integral formulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2020年第12期41卷 1897-1914页

作者： linchong CHEN xiaolin li School of Mathematics and Information Engineering Chongqing University of EducationChongqing 400065China School of Mathematical Sciences Chongqing Normal UniversityChongqing 400047China

The Burton-Miller boundary integral formulation is solved by a complex variable boundary element-free method(CVBEFM)for the boundary-only meshless analysis of acoustic problems with arbitrary *** regularize both strongly singular and hypersingular integrals and to avoid the computation of the solid angle and its normal derivative,a weakly singular Burton-Miller formulation is derived by considering the normal derivative of the solid angle and adopting the singularity subtraction *** facilitate the implementation of the CVBEFM and the approximation of gradients of the boundary variables,a stabilized complex variable moving least-square approximation is selected in the meshless discretization *** results show the accuracy and efficiency of the present CVBEFM and reveal that the method can produce satisfactory results for all wavenumbers,even for extremely large wavenumbers such as k=10000.

关键词： meshless method complex variable moving least-square approximation boundary element-free method Burton-Miller formulation regularization high frequency acoustic problem large wavenumber

维普期刊数据库

GALERKIN BOUNDARY NODE METHOD FOR EXTERIOR NEUMANN PROBLEMS

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2011年第3期29卷 243-260页

作者： xiaolin li Jialin Zhu College of Mathematics Science Chongqing Normal University Chongqing ~000~7 China College of Mathematics and Physics Chongqing University Chongqing 400044 China

In this paper, we present a meshless Galerkin scheme of boundary integral equations （BIEs）, known as the Galerkin boundary node method （GBNM）, for two-dimensional ex- terior Neumann problems that combines the moving least-squares （MLS） approximations and a variational formulation of BIEs. In this approach, boundary conditions can be imple- mented directly despite the MLS approximations lack the delta function property. Besides, the GBNM keeps the symmetry and positive definiteness of the variational problems. A rigorous error analysis and convergence study of the method is presented in Sobolev spaces. Numerical examples are also given to illustrate the capability of the method.

关键词： Meshless Galerkin boundary node method Boundary integral equations Moving least-squares Error estimate.

A Nitsche-Based Element-Free Galerkin Method for Semilinear Elliptic Problems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Applied Mathematics and Mechanics 2024年第1期16卷 24-46页

作者： Tao Zhang xiaolin li School of Mathematics Physics and Data ScienceChongqing University of Science and TechnologyChongqing 401331China School of Mathematical Sciences Chongqing Normal UniversityChongqing 400047China Key Laboratory for Optimization and Control Ministry of Education Chongqing Normal UniversityChongqing 400047China

A Nitsche-based element-free Galerkin(EFG)method for solving semilinear elliptic problems is developed and analyzed in this *** existence and uniqueness of the weak solution for semilinear elliptic problems are proved based on a condition that the nonlinear term is an increasing lipschitz continuous function of the unknown function.A simple iterative scheme is used to deal with the nonlinear integral *** proved the existence,uniqueness and convergence of the weak solution sequence for continuous level of the simple iterative scheme.A commonly used assumption for approximate space,sometimes called inverse assumption,is *** order error estimates in L 2 and H1 norms are proved for the linear and semilinear elliptic *** the actual numerical calculation,the characteristic distance h does not appear explicitly in the parameterβintroduced by the Nitsche *** theoretical results are confirmed numerically。

关键词： Meshless method element-free Galerkin method Nitsche method semilinear elliptic problem error estimate

Experimental Study of Temperature Control Based on Composite Phase Change Materials during Charging and Discharging of Battery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal Science 2024年第2期33卷 578-590页

作者： li xiaolin WANG Jun CAO Wenxiang ZHANG Xuesong School of Automotive and Traffic Engineering Jiangsu UniversityZhenjiang212013China

This study is to utilize the heat-absorbing and releasing capabilities of phase change materials(PCM)to regulate the surface temperature fluctuations of batteries during charging and *** goal is to keep the battery within the optimal operating temperature *** impact of PCM thickness and phase change temperature on battery temperature is investigated by encircling a cylindrical battery with a PCM *** improve the thermal conductivity of PCM,expanded graphite(EG) is added to make a composite phase change material(CPCM),and the effects of various EG mass ratios on battery surface temperature and CPCM utilization level are *** findings indicate that increasing PCM thickness effectively extends temperature control time,but its impact is *** difference in phase change temperature of PCM controls the battery temperature in different temperature *** phase change temperatures are unsuitable for controlling battery temperature in high temperature *** addition of EG enhances the thermal conductivity of PCM,leading to further control of battery *** results show that the addition of 6%(mass ratio) EG to CPCM extends the effective temperature control time by 11 min and improves by 28% compared to a single *** CPCM utilization is also more satisfactory and achieved a balance between heat storage and thermal conductivity in a battery thermal management system(BTMS) based on PCM.

关键词： phase change material expanded graphite thermal management system effective control time

维普期刊数据库

A trust-aware random walk model for return propensity estimation and consumer anomaly scoring in online shopping

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2019年第5期62卷 75-91页

作者： xiaolin li Yuan ZHUANG Yanjie FU Xiangdong HE School of Business Nanjing University Department of Computer Science Missouri University of Science and Technology Network and Information Center Nanjing University

In online shopping, most of consumers will not clear their return reasons when submitting return requests(e.g., select the option "other reasons"). Prior literature mostly investigates into the return event at the transaction level, and the underlying force of returns remains untracked. To deal with this problem, we propose a machine learning algorithm named as trust-aware random walk model(TARW). In the proposed model, four patterns of consumers can be identified in terms of return forces:(i) selfish consumers,(ii) honest consumers,(iii) fraud consumers, and(iv) irrelevant consumers. To profile consumers’ return patterns, we capture consumers’ similarities in order preferences and return tendencies separately. Based on consumers’ similarities, we obtain a return pattern trust network by introducing the trust network and collaborative filtering algorithms. Subsequently, we develop two important applications based on the trust network:(i)estimating consumers’ return propensities for product types;(ii) scoring the anomaly for consumers’ returns for one product. Finally, we conduct extensive experiments with the real-world data to validate the model’s effectiveness in predicting and tracing consumers’ returns. With the proposed model, we can help retailers improve the conversion rates of selfish consumers, retain honest consumers, and block fraud consumers.

关键词： machine learning return abuse random walk collaborative filtering return pattern