检索结果-南通市图书馆

Hand-eye calibration with a new linear decomposition algorithm

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 Zhejiang University-Science A(Applied Physics & Engineering) 2008年第10期9卷 1363-1368页

作者： rong-hua LIANG jian-fei MAO College of Information Engineering Zhejiang University of Technology Hangzhou 310032 China

To solve the homogeneous transformation equation of the form AX=XB in hand-eye calibration, where X represents an unknown transformation from the camera to the robot hand, and A and B denote the known movement transformations associated with the robot hand and the camera, respectively, this paper introduces a new linear decomposition algorithm which consists of singular value decomposition followed by the estimation of the optimal rotation matrix and the least squares equation to solve the rotation matrix of X. Without the requirements of traditional methods that A and B be rigid transformations with the same rotation angle, it enables the extension to non-rigid transformations for A and B. The details of our method are given, together with a short discussion of experimental results, showing that more precision and robustness can be achieved.

关键词： Homogeneous transformation equation Singular value decomposition (SVD) Optimal rotation matrix Rigid transformations

Empirical likelihood for spatial cross-sectional data models with matrix exponential spatial specification

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics(A Journal of Chinese Universities) 2024年第1期39卷 125-139页

作者： LIU Yan rong jian-rong QIN Yong-song Nanning University Nanning 530200China Center for Applied Mathematics of Guangxi and College of Mathematics and Statistics Guangxi Normal UniversityGuilin 541004China

In this paper,we study spatial cross-sectional data models in the form of matrix exponential spatial specification(MESS),where MESS appears in both dependent and error *** empirical likelihood(EL)ratio statistics are established for the parameters of the MESS *** is shown that the limiting distributions of EL ratio statistics follow chi-square distributions,which are used to construct the confidence regions of model *** experiments are conducted to compare the performances of confidence regions based on EL method and normal approximation method.

关键词： MESS empirical likelihood con dence region

Internal structural optimization of hollow fan blade based on sequential quadratic programming algorithm

在线全文

学校读者我要写书评

暂无评论

航空动力学报 2011年第4期26卷 787-793页

作者： YANG jian-qiu WANG Yan-rong School of Jet Propulsion Beijing University of Aeronautics and Astronautics Beijing 100191 China

Several structural design parameters for the description of the geometric features of a hollow fan blade were determined.A structural design optimization model of a hollow fan blade which based on the strength constraint and minimum mass was established based on the finite element method through these ***,the sequential quadratic programming algorithm was employed to search the optimal *** groups of value for initial design variables were chosen,for the purpose of not only finding much more local optimal results but also analyzing which discipline that the variables according to could be benefit for the convergence and *** surface method and Monte Carlo simulations were used to analyze whether the objective function and constraint function are sensitive to the variation of variables or *** the robust results could be found among a group of different local optimal solutions.

关键词： hollow fan blade structural optimization sequential quadratic algorithm finite element method Monte Carlo simulations

A New Proof of the Lattice Structure of Many-to-Many Pairwise-Stable Matchings

在线全文

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2014年第3期2卷 369-377页

作者： jian-rong Li School of Mathematics South China Normal UniversityGuangzhou 510631China

This paper studies,under substitutable and cardinal monotone preferences,the lattice structure of the set SePT of many-to-many pairwise-stable *** proves that the selection matchings are increasing functions on *** fact,along with a few auxiliary results,is then used to prove that SePT is a distributive *** contribution of this paper is not new,but the alternative proof is interesting as it avoids the use of abstract lattice theory.

关键词： Pairwise-stable matching Lattice Cardinal monotonicity

Quark-Antiquark and Diquark Condensates in Vacuum in a 3D Two-Flavor Gross-Neveu Model

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

Communications in Theoretical Physics 2007年第4期47卷 695-698页

作者： zhou Bang-rong College of Physical Sciences Graduate School of the Chinese Academy of Sciences Beijing 100049 China CCAST （World Laboratory） P.O. Box 8730 Beijing 100080 China

The effective potential analysis indicates that, in a 3D two-flavor Gross-Neveu model in vacuum, depending on whether Gs/Hp is less or bigger than the critical value 2/3, where G s and H p are respectively the coupling constants of scalar quark-antiquark channel and pseudoscalar diquark channel, the system will have the ground state with pure diquark condensates or with pure quark-antiquark condensates, but never with coexistence of the two forms of condensates. The similarities and differences in the interplay between the quark-antiquark and the diquark condensates in vacuum in the 2D, 3D and 4D two-flavor four-fermion interaction models are summarized.

关键词： 3D Gross-Neveu model quark-antiquark and diquark condensates effective potential

Cornwall-Jackiw-Tomboulis Effective Potential for Quark Propagator in Real-Time Thermal Field Theory and Landau Gauge

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2005年第5X期44卷 879-882页

作者： zhou Bang-rong College of Physical Science Graduate School of the Chinese Academy of Sciences Beijing 100049 ChinaCCAST (World Laboratory) P.O. Box 8730 Beijing 100080 China

We complete the derivation of the Cornwall-Jackiw-Tomboulis effective potentiM for quark propagator at finite temperature and finite quark chemical potential in the real-time formalism of thermal field theory and in Landau gauge. In the approximation that the function A（p^2） in inverse quark propagator is replaced by unity, by means of the running gauge coupling and the quark mass function invariant under the renormalization group in zero temperature Quantum Chromadynamics （QCD）, we obtain a calculable expression for the thermal effective potential, which will be a useful means to research chiral phase transition in QCD in the real-time formalism.

关键词： CJT effective potential real-time thermal field theory QCD quark propagator Landau gauge

Quark-Antiquark and Diquark Condensates in Vacuum in a 2D Two-Flavor Gross-Neveu Model

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第3期47卷 520-524页

作者： zhou Bang-rong College of Physical Sciences Graduate School of the Chinese Academy of Sciences Beijing 100049i China CCAST （World Laboratory） P.O. Box 8730 Beijing 100080 China

The analysis based on the renormalized effective potential indicates that, similar to in the 4D two-flavor Nambu-Jona-Lasinio （NJL） model, in a 2D two-flavor Gross-Neveu model, the interplay between the quark-antiquark and the diquark ,condensates in vacuum also depends on Gs/Hs, the ratio of the coupling constants in scalar quarkantiquark and scalar diquark channel. Only the pure quark-antiquark condensates exist if Gs/Hs 〉 2/3, which is just the ratio of the color numbers of the quarks participating in the diquark and quark-antiquark condensates. The two condensates will coexist if 0 〈 Gs/Hs 〈 2/3. However, different from the 4D NJL model, the pure diquark condensates arise only at Gs/Hs = 0 and are not in a possibly finite region of Gs/Hs below 2/3.

关键词： 2D Gross-Neveu model quark-antiquark and diquark condensates effective potential renormalization mean-field approximation

Painlevé Property and Complexiton Solutions of a Special Coupled KdV Equation

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第10期50卷 809-813页

作者： YANG jian-rong MAO Jie-jian Department of Physics Jiangxi Shangrao Normal College Shangrao 334001 China Department of Physics Ningbo University Ningbo 315211 China

A special coupled KdV equation is proved to be the Painleve property by the Kruskal＇s simplification of WTC method. In order to search new exact solutions of the coupled KdV equation, Hirota＇s bilinear direct method and the conjugate complex number method of exponential functions are applied to this system. As a result, new analytical eomplexiton and soliton solutions are obtained synchronously in a physical field. Then their structures, time evolution and interaction properties are further discussed graphically.

关键词： special coupled KdV equation Painleve integrability bilinear method complexiton solution

Soliton Solutions of Coupled KdV System from Hirota's Bilinear Direct Method

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第1期49卷 22-26页

作者： YANG jian-rong MAO Jie-jian Department of Physics Shangrao Normal College Shangrao 334001 China Department of Physics Ningbo University Ningbo 315211 China

With Hirota＇s bilinear direct method, we study the special coupled KdV system to obtain its new soliton solutions. Then we further discuss soliton evolution, corresponding structures, and interesting interactive phenomena in detail with plot. As a result, we find that after the interaction, the solitons make elastic collision and there are no exchanges of their physical quantities including energy, velocity and shape except the phase shift.

关键词： coupled KdV system Hirota's bilinear method soliton solutions interactive property