检索结果-南通市图书馆

Dynamical understanding of loop soliton solution for several nonlinear wave equations

在线全文

学校读者我要写书评

暂无评论

science china mathematics 2007年第6期50卷 773-785页

It has been found that some nonlinear wave equations have one-loop soliton solutions. What is the dynamical behavior of the so-called one-loop soliton solution? To answer this question, the travelling wave solutions for four nonlinear wave equations are discussed. Exact explicit parametric representations of some special travelling wave solutions are given. The results of this paper show that a loop solution consists of three different breaking travelling wave solutions. It is not one real loop soliton travelling wave solution.

关键词： planar dynamical system homoclinic orbit solitary wave solution one-loop soliton solution periodic wave solution bifurcation nonlinear wave equation 34C37 34C23 74J30 58Z05

Bifurcations of travelling wave solutions for two generalized Boussinesq systems

在线全文

学校读者我要写书评

暂无评论

science china mathematics 2008年第9期51卷 1577-1592页

作者： li jibin1,2 1 department of mathematics, zhejiang normal university, jinhua 321004, china 2 department of mathematics, kunming university of science and technology, kunming 650093, china department of mathematics Zhejiang Normal University Jinhua 321004 China department of mathematics Kunming University of Science and Technology Kunming 650093 China

Using the methods of dynamical systems for two generalized Boussinesq systems, the existence of all possible solitary wave solutions and many uncountably infinite periodic wave solutions is obtained. Exact explicit parametric representations of the travelling solutions are given. To guarantee the existence of the above solutions, all parameter conditions are determined.

关键词： nonlinear wave bifurcation solitary wave exact explicit solution generalized Boussinesq system 34C37 34C23 74J30 58Z05

Dielectric polymer grafted electrodes enhanced aqueous supercapacitors

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 1525-1534页

作者： Shian Dong kunming Shi jie Chen Yingke Zhu Hongfei li Weihang Gao Zhenli Xu Qinglei liu Xingyi Huang Shanghai Key Laboratory of Electrical Insulation and Thermal Aging Department of Polymer Science and EngineeringState Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China School of Mathematical sciences Institute of Natural Sciences and MOE−LSCShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240China

Supercapacitors(SCs)have become increasingly important in electrical energy storage and delivery owing to their high power densities and long *** SCs are promising for large-scale engineering applications because of their low cost and ***,the low operating voltage and low energy density of aqueous SCs severely limit their practical *** this study,a nanoscale dielectric layer is grafted onto a graphene electrode to achieve both a high operating voltage and enhanced *** with an SC without dielectric grafting,a dielectric-enhanced SC(DESC)shows a higher capacitance by 2200%.The mechanism of the capacitance enhancement can be attributed to three factors:the dielectric polarization,the ions desolvation by the dielectric,and the enhanced quantum capacitance from charge transfer and ion adsorption in the polymer *** addition,a 2.5 V pouch DESC with a 1 M KCl electrolyte is confirmed to cycle up to 50,000 times with a capacitance retention of 87.5%.The DESC presents the optimal electrochemical properties after it is grafted with a 5 nm dielectric *** study provides new insights into the design of high-voltage and high-energy-density aqueous SCs.

关键词： supercapacitors dielectric polymer high voltage capacitance enhancement

Strong uniqueness of best approximations in spaces of bounded linear operators

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

science china mathematics 2004年第3期47卷 339-351页

作者： li Chong HE jinsu department of mathematics, zhejiang university Hangzhou 310027, china department of mathematics, zhejiang normal university jinhua 321004, china 1. department of mathematics Zhejiang University 310027 Hangzhou China 2. department of mathematics Zhejiang Normal University 321004 Jinhua China

The present paper is concerned with problems of the strong uniqueness of the best approximation and the characterization of a uniqueness element in operator *** results on the strong uniqueness of the best approximation operatorfrom RS-sets are proved and the uniqueness element of a sun in the compactoperator space from c0 to c0 is characterized by the strict Kolmogorov's *** recent results due to Lewicki and others are extended and improved.

关键词： best approximation operator, RS-set, sun, strong uniqueness, uniqueness element.

Full T-cell activation and function in teleosts require collaboration of first and co-stimulatory signals

在线全文

学校读者我要写书评

暂无评论

Zoological Research 2024年第1期45卷 13-24页

作者： Wei liang Kang li Haiyou Gao kunming li jiansong Zhang Qian Zhang Xinying jiao jialong Yang Xiumei Wei State Key Laboratory of Estuarine and Coastal Research School of Life SciencesEast China Normal UniversityShanghai 200241China Laboratory for Marine Biology and Biotechnology Qingdao National Laboratory for Marine Science and TechnologyQingdaoShandong 266237China

Mammalian T-cell responses require synergism between the first signal and co-stimulatory ***,whether and how dual signaling regulates the T-cell response in early vertebrates remains *** the present study,we discovered that the Nile tilapia(Oreochromis niloticus)encodes key components of the LAT signalosome,namely,LAT,ITK,GRB2,VAV1,SLP-76,GADS,and PLC-γ*** components are evolutionarily conserved,and CD3εmAb-induced T-cell activation markedly increased their ***,at least ITK,GRB2,and VAV1 were found to interact with LAT for signalosome *** of the first signal,the NF-κB,MAPK/ERK,and PI3K-AKT pathways were activated upon CD3εmAb ***,treatment of lymphocytes with CD28 mAbs triggered the AKT-mTORC1 pathway downstream of the co-stimulatory *** CD3εand CD28 mAb stimulation enhanced ERK1/2 and S6 phosphorylation and elevated NFAT1,c-Fos,IL-2,CD122,and CD44 expression,thereby signifying T-cell ***,rather than relying on the first or co-stimulatory signal alone,both signals were required for T-cell *** T-cell activation was accompanied by marked apoptosis and cytotoxic *** findings suggest that tilapia relies on dual signaling to maintain an optimal T-cell response,providing a novel perspective for understanding the evolution of the adaptive immune system.

关键词： Oreochromis niloticus CD3 CD28 T cells Adaptive immunity Evolution

ON THE ESTIMATIONS OF BOUNDS FOR DETERMINANT OF HADAMARD PRODUCT OF H-MATICES

在线全文

学校读者我要写书评

暂无评论

Journal of Computational mathematics 2001年第4期19卷 365-370页

作者： Yao-tang li (department of Mathemotics, Yuunan university, kunming 650091, china) ji-cheng li (department of mathematics, Xian jiaotong university, Xian 71049, china) 云南大学云南昆明 650091 西安交通大学陕西西安 710049

In this paper, some estimations of bounds for determinant of Hadamard product of H-matrices are given. The main result is the following: if A= (aij) and B=(bij) are nonsingular H-matrices of order n and ∏in=1, aiibii> 0, and Ak and Bk, k = 1, 2,…,n, are the k× k leading principal submatrices of A and B, respectively, then where M(Ak) denotes the comparison mains of Ak.

关键词： H-matrix Determinant Hadamard product.

Suspended sediment flux of river:Wavelet analysis in the Panlong basin of the Upper Red River (Honghe River),china

在线全文

学校读者我要写书评

暂无评论

Chinese science Bulletin 2007年第A02期52卷 172-179页

作者： DING WenRong~(1,2+) ZHOU Yue~(1,3) L XiXi~4 1 The Faculty of Environment science and Engineering,kunming university of science and technology,kunming 650093,china 2 College of Tourism and Geography science,Yunnan normal university,kunming 650092,china 3 Yunnan university of Finance and Economics,kunming 650221,china 4 department of Geography,National university of Singapore 119260,Singapore Univ Sci and Technol Kumasi Fac Environm Sci and Engn Kunming 650093 Peoples R China.

这份报纸把小浪分析用于检验变化趋势，多时间规模变化，在上面的红河的 Panlong 盆的推迟的沉积流动(SSF ) 的周期、突然的变化特征，中国。结果显示 SSF 从 1951 ～ 1997 增加了，但是自从 1998，衰退了。SSF 的变化把多时间规模特征... 详细信息

这份报纸把小浪分析用于检验变化趋势，多时间规模变化，在上面的红河的 Panlong 盆的推迟的沉积流动(SSF ) 的周期、突然的变化特征，中国。结果显示 SSF 从 1951 ～ 1997 增加了，但是自从 1998，衰退了。SSF 的变化把多时间规模特征和变化在不同时间时期改变了。三周期的时间规模， 4， 7 和 22 年，被决定。22 年的周期的时间规模，是在三次规模之中的最明显的，通过整个研究时期延长了，而第 4-a 7 年的时间规模在某些时间时期仅仅是明显的。分别地有 27 次越过 4 年的时间规模，越过 7 年的时间规模的 16 次和越过 22 年的时间规模的 5 次的突然的变化。根据统计的聚会和气候数据分析，我们断定人的活动是导致了多时间规模的 SSF，而是特征的变化趋势的主要原因，周期、突然的变化被气候变化主要影响。

关键词：河流中国红河微波分析

Uniform blow-up profiles and boundary layer for a parabolic system with localized nonlinear reaction terms

在线全文

学校读者我要写书评

暂无评论

science china mathematics 2005年第2期48卷 185-197页

作者： li Huiling & WANG Mingxin department of mathematics, Southeast university, Nanjing 210018, china department of mathematics, Xuzhou normal university, Xuzhou 221116, china 1. department of mathematics Southeast University 210018 Nanjing China 2. department of mathematics Xuzhou Normal University 221116 Xuzhou China

This paper deals with the blow-up properties of the solution to a semilinear parabolic system with localized nonlinear reaction terms, subject to the null Dirichlet boundary condition. We first give sufficient conditions for that the classical solution blows up in the finite time, secondly give necessary conditions and a sufficient condition for that two components blow up simultaneously, and then obtain the uniform blow-up profiles in the interior. Finally we describe the asymptotic behavior of the blow-up solution in the boundary layer.

关键词： parabolic system, localized nonlinear reaction terms, blow-up profiles, boundary layer size.

Abundant Semigroups with a Multiplicative Adequate Transversal

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2002年第2期18卷 229-244页

作者： GUO Xiao jiang department of mathematics.Yunnan university.kunming 650091,P.R.china department of mathematics Yunnan University Kunming P. R. China

The aim of this paper is to investigate abundant semigroups with a multiplicative adequate *** properties and characterizations for such semigroups are *** particular. we establish the structure of this class of abundant semigroups in terms of left normal bands,right normal braids and adequate semigroups with some simple Compatibility *** apply this structure to some special cases.

关键词： Abundant semigroup Adequate semigroup Left(Right)normal band