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Application of Multi-agent Particle Swarm Algorithm in Distribution Network Reconfiguration

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Chinese Journal of Electronics 2016年第6期25卷 1179-1185页

作者： SHU Dasong HUANG Zhixiong LI Junye ZOU Xiaoyang Central South university Hunan radio and tv university

An improved algorithm based on Multiagent particle swarm(MAS) is proposed to solve the distribution network reconfiguration problem in this *** approach is a combination of the learning, competition and cooperation mechanism of multi-agent technology and the strategies of Particle swarm optimization(PSO) algorithm. Using the Von Neumann topology structure in PSO algorithm, each particle represents an agent; each agent not only competes and cooperates with its neighborhood,but also absorbs the evolutionary mechanism of PSO algorithm, so as to share the information with the agent of global optimal. The rules of particle renovating reduce unfeasible solution in the process of particle renovating,and it is able to converge to global optimal accurately and quickly. Test on the IEEE 16-node, 32-node and 69-node system shows both a rapid convergence and a good robustness of this proposed approach.

关键词： Multi-agent system Particle swarm optimization Von Neumann topological structure Distribution network reconfiguration

DEFICIENT FUNCTIONS OF RANDOM DIRICHLET SERIES

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Acta Mathematica Scientia 2007年第2期27卷 291-296页

作者：周俊英孙道椿 Zhongshan radio & tv university School of Mathematical Sciences South China Normal university

In this article, the uniqueness theorem of Dirichlet series is proved. Then the random Dirichlet series in the right half plane is studied, and the result that the random Dirichlet series of finite order has almost su... 详细信息

关键词： Random series Dirichlet series deficient polynomial value distribution

Random quadralinear forms and schur product on tensors

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Journal of Zhejiang university-Science A(Applied Physics & Engineering) 2004年第3期5卷 101-103页

作者：麻志浩王成侯丽英 Department of Mathematics Zhejang University radio and tv university

In this work, we made progress on the problem that rpqlll哪(( is a Banach algebra under schur product. Our results extend Tonges results. We also obtained estimates for the norm of the random quadralinear form A: MNKHrpqsllll创串C, defined by: A(ei, ej, ek, es)=ijksa, where the (aijks)s are uniformly bounded, independent, mean zero random variables. We proved that under some conditions rpqsllll哪?(( is not a Banach algebra under schur product.

关键词： Random tensors Schur product Banach algebra

Energy-Efficient Sensing and Transmission for Multi-Hop Relay Cognitive radio Sensor Networks

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China Communications 2018年第9期15卷 106-117页

作者： Bin Han Min Zeng Qiumei Guo Hong Jiang Qiuyun Zhang Li Feng School of Information Engineering Southwest University of Science and Technology Engineering and Technology College Sichuan Radio and TV University

How to achieve transmissions in an energy-efficient way in multi-hop decode and forward(DF) relay cognitive radio sensor networks(CRSNs) is important since sensor nodes in CRSNs are usually battery powered. This paper aims to maximize energy efficiency(EE) by joint optimizing sensing time and power allocation in multi-channels & multihops DF relay CRSNs under constraints on outage probability and sensing performance. First, we design a channel selection scheme for sensing according to the available probabilities of multi channels. Second, we analyze the expected throughput and energy consumption and formulate the EE problem as a concave/concave fractional program. Third, coordinate ascent and Charnes-Cooper Transformation(CCT) methods are used to transform the nonlinear fractional problem into an equivalent concave problem. Subsequently, the closed form of outage probability is derived and the convergence rate of the iterative algorithm is analyzed. Finally, simulation results show that the proposed scheme can achieve effective EE.

关键词： energy efficiency cognitive radio sensor network outage probability fractional program

More Large Sets of Resolvable MTS and DTS with Even Orders

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Acta Mathematicae Applicatae Sinica 2008年第2期24卷 233-252页

作者： Qing-de Kang Rong-jia Xu Institute of Mathematics Hebei Normal University Shijiazhuang 050016 China Qinhuangdao radio and tv university Qinhuangdao 066001 China

In this paper, we first introduce a special structure that allows us to construct a large set of resolvable Mendelsohn triple systems of orders 2q ＋ 2, or LRMTS（2q ＋ 2）, where q = 6t ＋ 5 is a prime power. Using a computer, we find examples of such structure for t C T = {0, 1, 2, 3, 4, 6, 7, 8, 9, 14, 16, 18, 20, 22, 24}. Furthermore, by a method we introduced in [13], large set of resolvable directed triple systems with the same orders are obtained too. Finally, by the tripling construction and product construction for LRMTS and LRDTS introduced in [2, 20, 21], and by the new results for LR-design in [8], we obtain the existence for LRMTS（v）and LRDTS（v）, where v = 12（t ＋ 1） mi≥0（2.7mi＋1）mi≥0（2.13ni＋1）and t∈T,which provides more infinite family for LRMTS and LRDTS of even orders.

关键词： Large set resolvable Mendelsohn triple system tripling construction resolvable directed triple system

Microstructure and properties of YG8 cemented carbide with different pulse currents

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Rare Metals 2020年第5期39卷 597-606页

作者： Liao Wei Yi Yang Gang Yang School of Mechanical Engineering Sichuan UniversityChengdu 610065China College of Arts and Sciences Guangxi Radio and TV UniversityNanning 530022China

In order to study the effect of pulse current treatment on the mechanical properties,microstructure and cutting performance of YG8 cemented carbide,experiments were carried out by using self-made pulse current treatment device to treat cemented carbide samples with different current densities(J=5,10 and 15 A·mm^-2)After the treatment of pulse current,when the current density increased from 5 to 15 A·mm-2,the hardness of the sample was improved to HV 1605,HV 1629 and HV 1653from HV 1574;the transverse rupture strengths of the sample were 2136,2289 and 2364 MPa,which were all higher than that of the untreated sample(2062 MPa)increasing by 3.6%,11.0%and 14.6%,respectively;the corresponding cutting performance was increased by10.1%,13.9%and 19.4%,compared to that of the untreated *** tool’s life was also *** the treatmen of pulse current,pulse current provided the driving force for dislocation motion,making it more likely for the dislocation to multiply and slip,the dislocation density was increased,and the mechanical properties were significantly improved.

关键词： Pulse current YG8 cemented carbide Microstructure Mechanical properties Cutting performance

A new synchronization scheme based on time division multiplexing and wavelength division multiplexing technology for practical quantum key distribution system

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Chinese Physics B 2011年第5期20卷 73-79页

作者：钟平平张华妮王金东秦晓娟魏正军陈帅刘颂豪 Key Laboratory of Photonic Information Technology of Guangdong Higher Education Institutes SIPSE & LQIT South China Normal University Guangdong radio & tv university

Three clock synchronization schemes for a quantum key distribution system are compared experimentally through the outdoor fibre and the interaction physical model of the the clock signal and the the quantum signal in the quantum key distribution system is analysed to propose a new synchronization scheme based on time division multiplexing and wavelength division multiplexing technology to reduce quantum bits error rates under some transmission rate conditions, The proposed synchronization scheme can not only completely eliminate noise photons from the bright background light of the the clock signal, but also suppress the fibre nonlinear crosstalk.

关键词： quantum key distribution clock synchronization wavelength division multiplexing timedivision multiplexing

Diversity Suppression-Subtractive Hybridization Array for Profiling Genomic DNA Polymorphisms

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Journal of Integrative Plant Biology 2006年第4期48卷 460-467页

作者： Tong-Xiang Li Jin-Ke Wang Yun-Fei Bai Zu-Hong Lu State Key Laboratory of Bioelectronics Southeast University Nanjing 210096 China Gansu radio tv university Lanzhou 730030 China

Genomlc DNA polymorphlsms are very useful for tracing genetic traits end studying biological diversity among species. Here, we present a method we call the ＂diversity suppresslon-subtractlve hybridization array＂ for effectively profiling genomlc DNA polymorphisms. The method first obtains the subtracted gDNA fragments between any two species by suppression subtraction hybridization （SSH） to establish e subtracted gDNA library, from which diversity SSH arrays are created with the selected subtracted clones. The diversity SSH array hybridizes with the DIG-labeled genomlc DNA of the organism to be assayed. Six closely related Dendrobium species were studied as model samples. Four Dendrobium species as testers were used to perform SSH. A total of 617 subtracted positive clones were obtained from four Dendrobium species, and the average ratio of positive clones was 80.3%. We demonstrated that the average percentage of polymorphlc fragments of palrwlse comparisons of four Dendrobium species was up to 42.4%. A dendrogram of the relatedness of six Dendrobium species was produced according to their polymorphic profiles. The results revealed that the diversity SSH array Is a highly effective platform for profiling genomlc DNA polymorphlsms and dendrograms.

关键词： dendrogram diversity suppression-subtractive hybridization array genomic DNA polymorphisms.

Comparing the VGCG model as the unification of dark sectors with observations

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Science China(Physics,Mechanics & Astronomy) 2014年第4期57卷 796-800页

作者： LU JianBo CHEN LiDong XU LiXin LI TianQiang Department of Physics Liaoning Normal University Jilin radio and tv university School of Physics and Optoelectronic Technology Dalian University of Technology

Current observations indicate that 95% of the energy density in the universe is the unknown dark *** dark component is considered composed of two fluids:dark matter and dark *** it is a mixture of these two dark components,i.e.,one can consider it an exotic unknown dark *** this consideration,the variable generalized Chaplygin gas(VGCG)model is studied with not dividing the unknown fluid into dark matter and dark energy parts in this *** using the Markov Chain Monte Carlo method,the VGCG model as the unification of dark sectors is constrained,and the constraint results on the VGCG model parameters are,n=0.00057+0.0001+0.0009-0.0006-0.0006,α=0.0015+0.0003+0.0017-0.0015-0.0015and B s=0.778+0.016+0.030-0.016-0.035,obtained by the cosmic microwave background data from the 7-year WMAP full data points,the baryon acoustic oscillation data from Sloan Digital Sky Survey(SDSS)and 2-degree Field Galaxy Redshift(2dFGRS)survey,and the Union2 type Ia supernova data with systematic *** last,according to the evolution of deceleration parameter it is shown that an expanded universe from deceleration to acceleration can be obtained in VGCG cosmology.

关键词： variable generalized Chaplygin gas(VGCG) unification of dark matter and dark energy cosmic constraints