检索结果-南通市图书馆

Tunneling magnetoresistance of the double spin-filter junctions at nonzero bias

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2003年第2期46卷 122-130页

作者：谢征微李伯臧 Institute of Physics and Center for Condensed Matter Physics Chinese Academy of SciencesBeijing 100080China Department of PhysicsSichuan Normal UniversityChengdu 610066China Institute of Physics and Center for Condensed Matter Physics Chinese Academy of SciencesBeijing 100080China

A recent theoretical estimation indicated that the NM/FI/FI/NM double spin-filter junction (DSFJ, here the NM and FI represent the nonmagnetic electrode and the ferromagnetic insulator (semiconductor) spacer, respectively) could have very high tunneling magnetoresistance (TMR) at zero bias. To meet the requirement in research and application of the magnetoresistance devices, we have calculated the dependences of tunneling magnetoresistance of DSF J on the bias (volt-age), the thicknesses of ferromagnetic insulators (semiconductors) and the average barrier height. Our results show that except its very high value, the TMR of DSFJ does not decrease montonously and rapidly with rising bias, but increase slowly at first and decrease then after having reached a maximum value. This feature is in distinct contrast to the ordinary magnetic tunnel junction FM/NI/FM (FM and NI denote the ferromagnetic electrode and the nonmagnetic insulator (semiconductor) spacer, respectively), and is of benefit to the use of DSFJ as a magnetoresistance device.

关键词： magnetic tunnel junction, double spin-filter junction, tunneling magnetoresistance, nonzero bias.

Learning-based control for discrete-time constrained nonzero-sum games

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CAAI Transactions on Intelligence Technology 2021年第2期6卷 203-213页

作者： Chaoxu Mu Jiangwen Peng Yufei Tang School of Electrical and Information Engineering Tianjin UniversityTianjinChina Department of Computer Electrical Engineering and Computer ScienceFlorida Atlantic UniversityUSA

A generalized policy-iteration-based solution to a class of discrete-time multi-player nonzero-sum games concerning the control constraints was *** on initial admissible control policies,the iterative value function of each player converges to the optimum approximately,which is structured by the iterative control policies satisfying the Nash ***,the stability analysis is shown to illustrate that the iterative control policies can stabilize the system and minimize the performance index function of each ***,neural networks are implemented to approximate the iterative control policies and value functions with the impact of control ***,two numerical simulations of the discrete-time two-player non-zero-sum games for linear and non-linear systems are shown to illustrate the effectiveness of the proposed scheme.

关键词： iterative nonzero approximate

nonzero Solutions of Generalized Variational Inequalities

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 2010年第1期1卷 81-86页

作者： Jue Li Yisheng Lai Department of Information and Computer Science Zhejiang Gongshang University Hangzhou China

The existence of nonzero solutions for a class of generalized variational inequalities is studied by ?xed point index approach for multivalued mappings in ?nite dimensional spaces and re?exive Banach spaces. Some new ... 详细信息

关键词： Variational Inequality Fixed Point Index of Multivalued Mappings nonzero Solution

Application of the Two nonzero Component Lemma in Resource Allocation

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 Applied Mathematics and Physics 2014年第7期2卷 653-661页

作者： Morteza Seddighin Mathematics Department Indiana University East Richmond IN USA

In this paper we will generalize the author's two nonzero component lemma to general self-reducing functions and utilize it to find closed from answers for some resource allocation problems.

关键词： Two nonzero Component Lemma Resource Allocation The Distribution of the Search Effort

The Case of nonzero Initial Conditions in the Evolution of the Charge Density Distribution Function for a Spherically Symmetric System

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 Applied Mathematics and Physics 2014年第7期2卷 495-502页

作者： Boris I. Sadovnikov Alex A. Zhavoronkov Faculty of Physics Moscow State University Moscow Russian Moscow Institute of Physics and Technology Dolgoprudny Russian

We explored the Cauchy problem for the evolution of the charge density distribution function for a spherically symmetric system with nonzero initial conditions. In our model, the evolution of the charge density distribution function is simulated for the case of a non-uniform charged sphere. The initial speed of the system is nonzero. The solution breaks down into two components: the first one describes the system’s motion as a whole and the second describes the process of the evolution of the charge density function under the influence of its own electric field in the center-of-mass system. In this paper we considered the characteristic features of the implementation of a difference scheme for numerical simulation. We also illustrate the process of “scattering” of a moving charged system under the influence of its own electric field on the basis of the solution of the Cauchy problem for vector functions of the electric field and vector velocity field of a charged medium.

关键词： Cauchy Problem nonzero Initial Conditions Charge Density Distribution

Proving and Extending Greub-Reinboldt Inequality Using the Two nonzero Component Lemma

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 Linear Algebra & Matrix Theory 2014年第2期4卷 120-127页

作者： Morteza Seddighin Indiana University East Richmond IN 47374 USA

We will use the author’s Two nonzero Component Lemma to give a new proof for the Greub-Reinboldt Inequality. This method has the advantage of showing exactly when the inequality becomes equality. It also provides information about vectors for which the inequality becomes equality. Furthermore, using the Two nonzero Component Lemma, we will generalize Greub-Reinboldt Inequality to operators on infinite dimensional separable Hilbert spaces.

关键词： Greub-Reinboldt Inequality Two nonzero Component Lemma

Exact Treatment of l≠0 States

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2004年第9期21卷 1685-1688页

作者： B.Gonul DepartmentofEngineeringPhysics FacultyofEngineeringUniversityofGaziantep27310Gaziantep-Turkiye

Using the basic ingredient of supersymmetry, we present a general procedure for the treatment of quantum states having nonzero angular momenta.

关键词： Chpher(0) nonzero Angle Countries (nations) QUANTUM STATES Angular momentum supersymmetry Exact

Spectral analysis of generalized Volterra equation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2019年第5期14卷 1063-1075页

作者： Junyi ZHU Xinxin MA Zhijun QIAO School of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China School of Mathematical and Statistical Sciences University of Texas Rio Grande ValleyEdinburgTX 78539USA

A generalized Volterra lattice with a nonzero boundary condition is considered by virtue of the inverse scattering *** two-sheeted Riemann surface associated with the boundary problem is transformed into the Riemann sphere by introducing a suitable variable *** associated spectral properties of the lattice in single-valued variable was *** constraint condition about the nonzero boundary condition and the scattering data is found.

关键词： Volterra lattice nonzero boundary condition inverse scattering transform

On a Conjecture of Hayman

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 1991年第2期7卷 119-126页

作者：华歆厚庄圻泰 Department of Mathematics Peking University

Let f(z) be a transcendental meromorphic function in the plane. Hayman conjecturedthat ff’ assumes all finite values except possibly zero infinitely many times. In this paper, we solve thisconjecture partly.

关键词： infinitely possibly partly nonzero integer inequality Chuang 解口 deduce noting