检索结果-南通市图书馆

The Generalized Serre Problem over K-Hermite Rings

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2017年第2期30卷 510-518页

作者： liU Jinwang li dongmei College of Mathematics and Computations Hunan University of Science and TechnologyXiangtan 411201China State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of SciencesBeijing 100093China

This paper investigates the completion and the zero prime factorization for matrices over a K-Hermite ring. The authors have generalized Kaplansky's related results, solved similar lin-Bose problem and generalized Ser... 详细信息

关键词： Completion of matrix factorization of matrix K-Hermite ring.

An Improvement for GVW

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2022年第1期35卷 427-436页

作者： ZHENG licui li dongmei liU Jinwang Department of Mathematics and Computing Sciences Hunan University of Science and TechnologyXiangtan 411201China

Gao,et al.(2015)gave a simple algorithm to compute Gr?bner bases named *** can be used to compute Gr?bner bases for both ideals and syzygies at the same time,and the latter plays an important role in free resolutions in homological *** GVW algorithms the authors need to compute all the J-pairs firstly and then use GVW criterion(which refers the criterions used in GVW)to determine which one is useless or which one the authors should do *** this paper,based on the study of relations between J-pairs,the authors propose the concept of *** concept allows the authors to filter the useless J-pairs in a rather convenient ***,by using this concept,the authors may easily determine which two pairs’J-pair need not to be ***,the Gr?bner basis which the authors obtained is relatively simpler than the one in GVW.

关键词： Factor Grobner basic GVW

Smith Form of Triangular Multivariate Polynomial Matrix

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2023年第1期36卷 151-164页

作者： liU Jinwang WU Tao li dongmei School of Mathematics and Computing Sciences Hunan University of Science and TechnologyXiangtan 411201China

The Smith form of a matrix plays an important role in the equivalence of *** is known that some multivariate polynomial matrices are not equivalent to their Smith *** this paper,the authors investigate mainly the Smith forms of multivariate polynomial triangular matrices and testify two upper multivariate polynomial triangular matrices are equivalent to their Smith forms respectively.

关键词： Degree-Lexicographical order equivalence of matrix multidimensional system multivariate polynomial matrix Smith form

同方期刊数据库

Factorization for n-D Polynomial Matrices over Arbitrary Coefficient Field

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2020年第1期33卷 215-229页

作者： liU Jinwang li dongmei ZHENG licui School of Mathematics and Computing Sciences Hunan University of Science and TechnologyXiangtan 411201China

Multivariate(n-D)polynomial matrix factorization is one of important research contents in multidimensional(n-D)systems,circuits,and signal *** this paper,several results on n-D polynomial matrices factorization over arbitrary coefficient fields are *** on these results,generalizations of some results on general matrix factorization are obtained for given n-D polynomial matrices whose maximal order minors or lower order minors satisfy certain *** proposed results fit for arbitrary coefficient field and have a wide range of application.

关键词： Coefficient field matrix factorization multidimensional polynomial matrix order minor

THE λ-GROBNER BASES UNDER POLYNOMIAL COMPOSITION

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2007年第4期20卷 610-613页

作者： Jinwang liU dongmei li Xiaosong CHEN School of Mathematics and Computing Science Hunan Science and Technology University Xiangtan 411201 China School of Mathematical Sciences and China. Technology Central South University Changsha 410083

Polynomial composition is the operation of replacing variables in a polynomial with other polynomials. λ-Grgbner basis is an especial Grobner basis. The main problem in the paper is： when does composition commute with λ-Grobner basis computation？ We shall answer better the above question. This has a natural application in the computation of λ-Grobner bases.

关键词： λ-Grobner basis polynomial composition term ordering

Improved electromigration reliability of surface acoustic wave devices using Ti/Al-Mo/Ti/Al-Mo electrodes

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

Rare Metals 2009年第6期28卷 554-558页

作者： li dongmei liU Ming Institute of Microelectronics Chinese Academy of Sciences Beijing 100029 China

In order to obtain both high electromigration （EM） reliability and free-dimensional control in high-frequency surface acoustic wave （SAW） devices, 4-layered Ti/Al-Mo/Ti/Al-Mo electrode films were investigated on 128° Y-X liNbO3 substrates by sputtering deposition. The resuits indicated that the 4-layered films had an improved EM reliability compared to conventional Al-0.5wt.%Cu films. Their lifetime is approximately three times longer than that of the Al-0.5wt.%Cu films tested at a current density of 5 x 107 A/cm^2 and a temperature of 200℃. Moreover, the 4-layered films were easily etched in reactive ion etching and fine-dimensional control was realized during the pattern replication for high-frequency SAW devices. For the 4-layered films, an optimum Mo quantity and sputtering parameters were very significant for high EM reliability.

关键词： electrode films magnetron sputter electromigration surface acoustic wave devices

Normal projection： deterministic and probabilistic algorithms

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2014年第1期9卷 93-99页

作者： dongmei li Jinwang liU Weijun liU Department of Mathematics and Computing Sciences Hunan University of Scienceand Technology Xiangtan 411201 China Department of Mathematics and Statistics Central South University Changsha 410083 China

We consider the following problem： for a collection of points in an n-dimensional space, find a linear projection mapping the points to the ground field such that different points are mapped to different values. Such projections are called normal and are useful for making algebraic varieties into normal positions. The points may be given explicitly or implicitly and the coefficients of the projection come from a subset S of the ground field. If the subset S is small, this problem may be hard. This paper deals with relatively large S, a deterministic algorithm is given when the points are given explicitly, and a lower bound for success probability is given for a probabilistic algorithm from in the literature.

关键词： Normal projection primary decomposition of ideal deterministic algorithm

Recent Progress of Counter Electrodes in Nanocrystalline Dye-sensitized Solar Cells

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

Journal of Materials Science & Technology 2007年第5期23卷 577-582页

作者： Kexin li Zhexun YU Yanhong LUO dongmei li Qingbo MENG Beijing National Laboratory for Condensed Matter Phy~cs Institute of l~hysics Chinese Academy of Sciences Beijing100080 China

Dye-sensitized solar cell （DSC） consists a combination of several different materials： photoanodes with nanoparticulated semiconductors, sensitizers, electrolytes and counter electrodes （CEs）. Each materials performs specific task for the conversion of solar energy into electricity. The main function of CE is to transfer electrons to the redox electrolyte and regenerate iodide ion. The work of CE is mainly focused on the studies of the kinetic performance and stability of the traditional CEs to improve the overall efficiency of DSC, seeking novel design concepts or new materials. In this review, the development and research progress of different CE materials and their electrochemical performance, and the problems are discussed.

关键词： Counter electrode Dye-sensitized solar cell Carbon Polymer

Privacy-preserving large-scale systems of linear equations in outsourcing storage and computation

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2018年第3期61卷 148-156页

作者： dongmei li Xiaolei DONG Zhenfu CAO Haijiang WANG Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai Key Lab of Trustworthy Computing East China Normal University

Along with the prevalence of cloud computing, it can be realised to efficiently outsource costly storage or computations to cloud servers. Recently, secure outsourcing mechanism has received more and more attention. We focus on secure outsourcing storage and computation for large-scale systems of linear equations(LEs) in this paper. Firstly, we construct a new efficient matrix encryption scheme. Then we exploit this encryption scheme to develop a new algorithm which can implement outsourcing storage and computation for large-scale linear equations in the semi-honest setting. Compared with the previous work,the proposed algorithm requires lower storage overhead and is with competitive efficiency.

关键词： cloud computing privacy-preserving linear equations encryption security