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Vertex-disjoint K_1+(K_1 ∪ K_2) in K_(1,4)-free Graphs with Minimum Degree at Least Four

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Acta Mathematica Sinica,English Series 2014年第4期30卷 661-674页

作者： Yun Shu GAO qing song ZOU School of Mathematics and Computer Science Ningxia University Department of Mathematics Xidian University

A graph is said to be K1,4-free if it does not contain an induced subgraph isomorphic to K1,4. Let κ be an integer with κ ≥ 2. We prove that if G is a K1,4-free graph of order at least llκ- 10 with minimum degree ... 详细信息

关键词： Forbidden graphs Vertex-disjoint subgraphs Minimum degree

Nonlinear Tripartite Entangled State Representation and Related Generalized Wigner Function

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Communications in Theoretical Physics 2005年第3X期44卷 541-546页

作者： WANG Pei-qing song Tong-Qiang Physics Department Ningbo University Ningbo 315211 China

We construct the nonlinear tripartite entangled state representation and the related generalized Wigner operator. Then we discussed the Wigner functions of the nonlinear tripartite entangled state and the three-mode nonlinear squeezed vacuum state, and obtained the classical Weyl corresponding function of the three-mode nonlinear squeezed state.

关键词： nonlinear entangled states generalized Wigner operator IWOP technique

Squeezing Transformation of Three-Mode Entangled State

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Communications in Theoretical Physics 2005年第5X期44卷 911-916页

作者： QIAN Xiao-qing song Tong-Qiang Department of Physics Ningbo University Ningbo 315211 China

We introduce the three-mode entangled state and set up an experiment to generate it. Then we discuss the three-mode squeezing operator squeezed ｜p, X2, X3〉→μ^-3/2｜p/μ, X2/μ, X3/μ） and the optical implement to realize such a squeezed state. We also reveal that c-number .asymmetric shrink transform in the three-mode entangled state, i.e. ｜p, X2,X3）→μ^-1/2｜p/μ, X2,X3）, maps onto a kind of one-sided three-mode squeezing operator {iλ （∑i^3=1 Pi）（∑i^3=1 Qi） -λ/2}. Using the technique of integration within an ordered product （IWOP） of operators, we derive their normally ordered forms and construct the corresponding squeezed states.

关键词： three-mode entangled state c-number asymmetric shrink transform one-sided three-mode squeezing operator

Modified likelihood ratio test for homogeneity in normal mixtures with two samples

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Applied Mathematics(A Journal of Chinese Universities) 2008年第1期23卷 113-119页

作者： QIN Yong-song LEI qing-zhu School of Math. Sci. Guangxi Normal Univ. Guilin 541004 China.

This paper investigates the modified likelihood ratio test（LRT） for homogeneity in normal mixtures of two samples with mixing proportions unknown. It is proved that the limit distribution of the modified likelihood ... 详细信息

关键词： mixture model likelihood ratio test asymptotic distribution.

Part Decomposition and Refinement Network for Human Parsing

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IEEE/CAA Journal of Automatica Sinica 2022年第6期9卷 1111-1114页

作者： Lu Yang Zhiwei Liu Tianfei Zhou qing song Beijing University of Posts and Telecommunications Beijing 100876China Institute of Automation Chinese Academy of SciencesNational Laboratory of Pattern RecognitionBeijing 100190China ETH Zurich Zurich 8092Switzerland

Dear Editor,This letter is concerned with human parsing based on part-wise semantic *** body can be regarded as a whole structure composed of different semantic parts,and the mainstream single human parser uses semant... 详细信息

关键词： prediction Human problem

An Efficient Algorithm for Self-consistent Field Theory Calculations of Complex Self-assembled Structures of Block Copolymer Melts

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Chinese Journal of Polymer Science 2018年第4期36卷 488-496页

作者： Jun-qing song Yi-Xin Liu Hong-Dong Zhang State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University

Self-consistent field theory（SCFT）, as a state-of-the-art technique for studying the self-assembly of block copolymers, is attracting continuous efforts to improve its accuracy and efficiency. Here we present a fourth-order exponential time differencing Runge-Kutta algorithm（ETDRK4） to solve the modified diffusion equation（MDE） which is the most time-consuming part of a SCFT calculation. By making a careful comparison with currently most efficient and popular algorithms, we demonstrate that the ETDRK4 algorithm significantly reduces the number of chain contour steps in solving the MDE, resulting in a boost of the overall computation efficiency, while it shares the same spatial accuracy with other algorithms. In addition, to demonstrate the power of our ETDRK4 algorithm, we apply it to compute the phase boundaries of the bicontinuous gyroid phase in the strong segregation regime and to verify the existence of the triple point of the O70 phase, the lamellar phase and the cylindrical phase.

关键词： Block copolymer Self-consistent field theory Algorithm Pseudo-spectral Phase structure

Enhanced copper recovery from low grade copper sulfide ores through bioleaching using residues produced by fermentation of agricultural wastes

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International Journal of Minerals,Metallurgy and Materials 2022年第12期29卷 2136-2143页

作者： Wei Chen Shenghua Yin qing song Leiming Wang Xun Chen Key Laboratory of Ministry of Education for High-Efficient Mining and Safety of Metal University of Science and Technology BeijingBeijing 100083China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China

Effects of residues produced by agricultural wastes fermentation(AWF)on low grade copper sulfide ores bioleaching,copper recovery,and microbial community were *** results indicated that adding appropriate bulk of AWF made contributions to low grade copper sulfide ores bioleaching,which may be mainly realized through reducing the passivation layer formed by Fe3+*** copper recovery(78.35%)and bacteria concentration(9.56×10^(7)cells·mL^(−1))were yielded in the presence of 5 g·L^(−1)*** result of 16S rDNA analysis demonstrated that microbial community was differentiated by adding *** proportion,such as Acidithiobacillus ferrooxidans,Moraxella osloensis,and Lactobacillus acetotolerans changed *** difference between samples was showed according to beta diversity index,and the maximum value reached *** ferrooxidans accounted for the highest proportion throughout the bioleaching process,and that of sample in the presence of 5 g·L^(−) AWF reached 28.63%.The results should show reference to application of agricultural wastes and low grade copper sulfide ores.

关键词： low grade copper sulfide ores bioleaching agricultural wastes fermentation microbial community

A Review on Cable-driven Parallel Robots

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Chinese Journal of Mechanical Engineering 2018年第4期31卷 37-47页

作者： Sen Qian Bin Zi Wei-Wei Shang qing-song Xu School of Mechanical Engineering Hefei University of Technology Department of Automation University of Science and Technology of China Department of Electromechanical Engineering Faculty of Science and TechnologyUniversity of Macao

Cable-driven parallel robots(CDPRs) are categorized as a type of parallel manipulators. In CDPRs, flexible cables are used to take the place of rigid links. The particular property of cables provides CDPRs several advantages, including larger workspaces, higher payload-to-weight ratio and lower manufacturing costs rather than rigid-link robots. In this paper, the history of the development of CDPRs is introduced and several successful latest application cases of CDPRs are presented. The theory development of CDPRs is introduced focusing on design, performance analysis and control theory. Research on CDPRs gains wide attention and is highly motivated by the modern engineering demand for large load capacity and workspace. A number of exciting advances in CDPRs are summarized in this paper since it is proposed in the 1980 s, which points to a fruitful future both in theory and application. In order to meet the increasing requirements of robot in different areas, future steps foresee more in-depth research and extension applications of CDPRs including intelligent control, composite materials, integrated and reconfigurable design.

关键词： Cable-driven parallel robots Design and modelling Control and planning Performance and optimization

New multi-color photometric investigations of solar-like contact binary V680 Per

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Research in Astronomy and Astrophysics 2020年第4期20卷 49-56页

作者： Jing-Jing Wang Jia-Jia He song-qing Zhao China University of Petroleum–Beijing at Karamay Karamay 834000China Yunnan Observatories Chinese Academy of SciencesKunming 650216China Key Laboratory of the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China

High-precision CCD photometric observations of the contact binary V680 Per were obtained *** symmetric multi-color light curves were analyzed by using the Wilson–Devinney(2013)*** photometric solutions suggest that V680 Per is an A-type W UMa contact binary with the mass ratio of q=0.693 and a fill-out factor of f=18.84%with a small temperature difference of 101 *** on all minimum times,the O-C curve was analyzed for the first time in this study.A cyclic oscillation(A3=0.00093 d,T3=4.92 yr)superimposed on a secular decrease(d P/dt=-8.16×10-8 d yr-1)was *** continuous decrease in period is possibly a result of mass transfer from the more massive component to the less massive one,or angular momentum loss due to a magnetic stellar *** of this secular decrease,it is predicted that the degree of contact will become higher,and V680 Per will evolve into a deeper overcontact binary.

关键词： binaries:eclipsing stars:solar-type stars:individual(V680 Per)