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A new approximating method for Holstein model

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science china(physics,Mechanics & Astronomy) 2010年第1期53卷 44-48页

作者： REN XueZao 1 , LIAO Xu 1 , LI Lei 1 & WANG KeLin 2 1 School of science, Southwest university of science and technology, Mian Yang 621010, china 2 department of modern physics, university of science and technology of china, hefei 230026, china Southwest university of science and technology School of Science Mian Yang China (GRID:grid.440649.b) (ISNI:***) university of science and technology of china Department of Modern Physics Hefei China (GRID:grid.59053.3a) (ISNI:***)

A new approach-the method of coherent state orthogonal expansion is developed for one-dimensional Holstein model. In zeroth order approximation, the formula of ground state energy is deduced analytically and the solutions in strong- and weak-coupling limits are obtained correctly. When the trial wave-function of ground state is expanded to the second order, the obtained ground state energy agrees quite well with that calculated by numerical method in all coupling regimes. The present approach can be easily generalized to the situations of higher dimensions and more electrons.

关键词： coherent-state orthogonal expansion polaron simulated annealing method

A Study of Multi-sensor Data Fusion System Based on MAS for Nutrient Solution Measurement

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稀有金属材料与工程 2006年第S3期 264-267页

作者： Feng Chen~1 Dafu Yang~1 Bing Wang~2 Xianhu Tan~1 (1.department of Automation,university of science and technology of china,hefei 230027,china) (2.department of modern physics,university of science and technology of china,hefei 230026,china)

For complementarity and redundancy of multi-sensor data fusion (MSDF) system,it is an effective approach for multiple components *** order to measure nutrient solution on-line,a dynamic and complex system under greenhouse environment,sensors should have intelligent properties including self-calibration and self-compensation. Meanwhile,it is necessary for multiple sensors to cooperate and interact for enhancing reliability of multi-sensor system. Because of the properties of multi-agent system (MAS),it is an appropriate tool to study MSDF *** paper proposed an architecture of MSDF system based on MAS for the multiple components measurement of nutrient *** sensor agent's structure and function modules are analyzed and described in detail,the formal definitions are given,*** relations of the sensors are modeled to implement reliability diagnosis of the multi-sensor system,so that the reliability of nutrient control system is *** study offers an effective approach for the study of MSDF.

关键词： multi-sensor data fusion multi-agent system nutrient solution reliability diagnosis.

Simulation study of real-time monitor for BEPC-Ⅱ luminosity

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science china(Technological sciences) 2010年第5期53卷 1215-1219页

作者： SHAN Qing1,2,WU Jian2,XUE Zhen2,XU ZiZong2,HU Tao3,WANG YiFang3 & WANG XiaoLian2 1 College of Material science and technology,Nanjing university of Aeronautics and Astronautics,Nanjing 210016,china 2 department of modern physics,university of science and technology of china,hefei 230026,china 3 Institute of High Energy physics,Chinese Academy of sciences,Beijing 100049,china College of Material science and technology Nanjing University of Aeronautics and Astronautics Nanjing China department of modern physics University of Science and Technology of China Hefei China Institute of High Energy physics Chinese Academy of Sciences Beijing China

A fast and real time luminosity monitor system will be used in the BEPC-Ⅱ(Beijing Electron Positron Collider,china).Photons generated in radiative Bhabha scattering at the interaction point are transformed into charged particles,and then the luminosity of each bunch pair is measured through collecting the Cherenkov light produced by charged particles in fused *** whole process happening in the detector is *** physics acceptance and detection threshold with the monitor accu-racy of 1% are set based on the simulation spectra of photoelectron yield calibrated by e-beam data.

关键词： luminosity BEPC-Ⅱ Cherenkov detector radiative Bhabha

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生物传感器的应用

物理 2003年第4期32卷 249-252页

作者：何星月刘之景中国科学技术大学生命科学院合肥230027 中国科学技术大学近代物理系合肥230026

综述了生物传感器的类型、基本原理、目前的研究现状及应用情况 .生物传感器是以生物分子作为敏感元件的一类新兴传感器 ,将化学信号、热信号、光信号转化成电信号或者直接产生电信号予以放大输出 ,从而得到检测结果 .生物传感器广泛应... 详细信息

综述了生物传感器的类型、基本原理、目前的研究现状及应用情况 .生物传感器是以生物分子作为敏感元件的一类新兴传感器 ,将化学信号、热信号、光信号转化成电信号或者直接产生电信号予以放大输出 ,从而得到检测结果 .生物传感器广泛应用于食品工业、环境监测、发酵工业、军事领域和临床医学等方面 .主要用于一些食品和污染物浓度的测量 ,微生物呼吸活性的测定 ,微生物培养方法的选择等 ,此外 ,还可以作为水处理设备的终端 .可以预料 ,生物传感器将向着微型化、实用化、多样化和人工智能化的方向发展 ,并且还将用于对生物功能进行人工模拟 ,研究人工感官 .生物传感器具有快速、准确、方便等优点 ,具有广阔的应用前景 ,必将在市场上开辟出一片新的天地 .

关键词：生物传感器类型基本原理食品工业环境监测发酵工业军事领域临床医学

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DNA微阵列制备的新进展

物理 2003年第9期32卷 599-603页

作者：彭英杰刘之景刘磁辉中国科学技术大学近代物理系合肥230026 中国科学技术大学物理系合肥230026

随着人类基因组测序的完成和蛋白组学工程的开展 ,具有高产出测序的特性的DNA微阵列技术的发展日新月异 ,其应用已经深入到了生命科学研究的很多方面 .与此同时 ,几种新的DNA微阵列制备技术迅速发展起来 .文章介绍了滚轮放大技术、聚酰... 详细信息

随着人类基因组测序的完成和蛋白组学工程的开展 ,具有高产出测序的特性的DNA微阵列技术的发展日新月异 ,其应用已经深入到了生命科学研究的很多方面 .与此同时 ,几种新的DNA微阵列制备技术迅速发展起来 .文章介绍了滚轮放大技术、聚酰胺胺表面法、三甲氧基对胺苯基硅烷重氮化法、化学纳米印迹法等四种制备方法的新进展 .

关键词： DNA微阵列滚轮放大技术聚酰胺胺表面法化学纳米印迹法临床医疗基因组测序技术

Financial market model based on self-organized percolation

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science Bulletin 2005年第19期 22-26页

作者： YANG Chunxia1, WANG Jie1, ZHOU Tao1,2, LIU Jun3, XU Min1, ZHOU Peiling1 & WANG Binghong2 1. department of Electronic science and technology, university of Sci-ence and technology of china, hefei 230026, china 2. department of modern physics, university of science and technology of china, hefei 230026, china 3. Graduate Program of Bioengineering, National university of Singa-pore, Singapore

Starting with the self-organized evolution of the trader group’s structure, a parsimonious percolation model for stock market is established, which can be considered as a kind of betterment of the Cont-Bouchaud model. The return distribution of the present model obeys Lévy form in the center and displays fat-tail property, in accord with the styl-ized facts observed in real-life financial time series. Fur-thermore, this model reveals the power-law relationship be-tween the peak value of the probability distribution and the time scales, in agreement with the empirical studies on the Hang Seng Index.

关键词： percolation self-organization Lévy distribution multi-agent financial market model

Epidemic dynamics on complex networks

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Progress in Natural science:Materials International 2006年第5期16卷 452-457页

作者： ZHOU Tao , FU Zhongqian, and WANG Binghong (department of Electronic science and technology, university of science and technology of china, hefei 230026, china department of modern physics, university of science and technology of china, hefei 230026, china) department of Electronic science and technology University of Science and Technology of China Hefei 230026 China department of modern physics University of Science and Technology of China Hefei 230026 China

Recently, motivated by the pioneer work in revealing the small-world effect and scale-free property of various real-life networks, many scientists devote themselves to studying complex networks. One of the ultimate goals is to understand how the topological structures affect the dynamics upon networks. In this paper, we give a brief review on the studies of epidemic dynamics on complex networks, including the description of classical epidemic models, the epidemic spread on small-world and scale-free networks, and network immunization. Finally, perspectives and some interesting problems are proposed.

关键词： epidemic dynamics complex networks critical value immunization small-world effect scale-free property.

Scheme for Entanglement Concentration of Unknown Multiparticle Greenberger-Horne-Zeilinger or W Class States

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Communications in Theoretical physics 2007年第12期48卷 1025-1028页

作者： SONG Wei hefei National Laboratory for Physical sciences at Microscale and department of modern physics,university of science and technology of china,hefei 230026,china hefei National Laboratory for Physical sciences at Microscale University of Science and Technology of China department of modern physics University of Science and Technology of China

We present,two schemes for concentrating unknown nonmaximally entangled Greenberger Horme-Zeilinger(GHZ) or W class *** first scheme for concentrating the nonmaximally entangled GHZ state is based on linearoptical *** second scheme for concentrating the W class states can be applied to a wide variety of atomic *** of our schemes are not postselection ones and are within the current technologies.

关键词： entanglement concentration GHZ class states W class states

A Note on Wigner Functions and *-Genvalue Equation

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Communications in Theoretical physics 2009年第4期51卷 605-608页

作者： JING Si-Cong LIN Bing-Sheng department of modern physics,university of science and technology of china,hefei 230026,china department of modern physics University of Science and Technology of China

In deformation quantization,static Wigner functions obey functional *-genvalue equation,which is equiv-alent to time-independent Schr■dinger equation in Hilbert space operator formalism of quantum *** equiv-alence is proved mostly for Hamiltonian with form H=（1/2）■;+V（■）[***,***.60（1964）581].In this note we generalize this proof to a very general Hamiltonian H（■,■）and give examples to support it.

关键词： Wigner function *-genvalue equation deformation quantization