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A study on the sharp knee and fine structures of cosmic ray spectra

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Science China(Physics,Mechanics & Astronomy) 2010年第5期53卷 842-847页

作者： WANG Bo1,YUAN Qiang1,FAN Chao1,2..HANG JianLi1,HU HongBo1 & BI XiaoJun1 1 Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China 2..epartment of Physics,Shandong University,Jinan 2..100,China Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China

The paper investigates the overall and detailed features of cosmic ray(CR) spectra in the knee region using the scenario of nuclei-photon interactions around the acceleration *** supernova remnants can be the physical realities of such kind of CR acceleration *** results show that the model can well explain the following problems simultaneously with one set of source parameters:the knee of CR spectra and the sharpness of the knee,the detailed irregular structures of CR spectra,the so-called"component B"of Galactic CRs,and the electron/positron excesses reported by recent *** coherent explanation serves as evidence that at least a portion of CRs might be accelerated at the sources similar to young supernova remnants,and one set of source parameters indicates that this portion mainly comes from standard sources or from a single source.

关键词： cosmic ray knee fine structures e+e-excesses "component B" single source

NRDRiso酶cDNA的序列测定及生物信息学分析

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生物工程学报 2004年第4期20卷 520-525页

作者：杜晶刘戈飞王桂玲徐晓琳王博朱莉沈阳医学院生化教研室沈阳110034 中国医科大学细胞生物学教研室沈阳110001

通过鉴定分析人肝组织中辅酶II依赖性视黄醇脱氢酶不同剪接体全长cDNA核苷酸序列与氨基酸序列的结构特征 ,为今后进一步研究体内维甲酸的代谢情况奠定基础。根据人、小鼠NRDR编码区的一致性序列 ,设计一对引物 ,应用RT PCR方法从人肝组... 详细信息

通过鉴定分析人肝组织中辅酶II依赖性视黄醇脱氢酶不同剪接体全长cDNA核苷酸序列与氨基酸序列的结构特征 ,为今后进一步研究体内维甲酸的代谢情况奠定基础。根据人、小鼠NRDR编码区的一致性序列 ,设计一对引物 ,应用RT PCR方法从人肝组织中得到一条 377bp的新的cDNA片段。采用RACE法得到了NRDR新亚型cDNA ,并以生物信息学软件分析其生物学特征。测序得知该cDNA长为 1 0 0 3bp ,以NADP dependentretinoldehydroge nase reductaseshortisoform(NRDRiso)登录GenBank。其读码框为 5 2..bp ,拟编码 1

关键词： NRDRiso cDNA序列测定选择性剪接生物信息学

Energy and fine structure of the lithium isoelectronic sequence

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原子与分子物理学报 1999年第3期16卷 12-19页

作者： QU Lian hua 1,WANG Zhi wen 2..I Bai wen 1 (1. Laboratory of magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics, Chinese Academy of Sciences,Wuhan 430071 2..epartment of mathematics and Physics, Wuyi University 中科院武汉物理与数学所湖北武汉五邑大学广东 529020

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｐｒｅｃｉｓｉｏｎｃａｌｃｕｌａｔｉｏｎｏｆｔｈｅｌｉｔｈｉｕｍｌｉｋｅｓｙｓｔｅｍｓｗｉｔｈａ１ｓ２ｃｏｒｅｐｒｅｓｅｎｔａｆｏｒｍｉｄａｂｌｅｃｈａｌｅｎｇｅ［１］．Ｆｏｒｓｏｍｅ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｐｒｅｃｉｓｉｏｎｃａｌｃｕｌａｔｉｏｎｏｆｔｈｅｌｉｔｈｉｕｍｌｉｋｅｓｙｓｔｅｍｓｗｉｔｈａ１ｓ２ｃｏｒｅｐｒｅｓｅｎｔａｆｏｒｍｉｄａｂｌｅｃｈａｌｅｎｇｅ［１］．Ｆｏｒｓｏｍｅｃｏｒｅｅｘｃｉｔｅｄｌｉｔｈｉｕ...

关键词： Excitation energy relativistic effects Fine structure

Application of splitting scheme and multigrid method for TV-Stokes denoising

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Science China(Information Sciences) 2011年第4期54卷 745-756页

作者： CHANG QianShun 1,TAI XueCheng 2.. XING LiLi 3 1 Institute of Applied Mathematics,Academy of Mathematics and Systems Sciences,Chinese Academy of Sciences,Beijing 100190,China 2..epartment of Mathematics,University of Bergen,Bergen 5007,Norway School of Physical and Mathematical Sciences,Nanyang Technological University,639798,Singapore 3 School of Mathematics and Computational Science,China University of Petroleum (East China),Dongying 2..061,China Institute of Applied Mathematics Academy of Mathematics and Systems Sciences Chinese Academy of Sciences Department of Mathematics University of Bergen School of Physical and Mathematical Sciences Nanyang Technological University School of Mathemat

Based on some previous work on the connection between image restoration and fluid dynamics,we apply a two-step algorithm for image *** the first step,using a splitting scheme to study a nonlinear Stokes equation,tangent vectors are *** the second step,an image is restored to fit the constructed tangent *** apply a fixed point iteration to solve the total variation-based image denoising problem,and use algebraic multigrid method to solve the corresponding linear *** results demonstrate that our algorithm is efficient and robust,and boundary conditions are satisfactory for image denoising.

关键词： image denoising total variation Stokes equation algebraic multigrid method

On power allocation for a cognitive radio network with hybrid spectrum sharing

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Science China(Information Sciences) 2011年第11期54卷 2425-2434页

作者： ZHANG Jing 1,2.. & ZHU HongBo 1 1 Key Laboratory of Wireless Communications of Jiangsu Province,Nanjing University of Posts & Telecommunications,Nanjing 2..003,China 2..ollege of Electronic Science & Engineering,Nanjing University of Posts & Telecommunications,Nanjing 2..003,China 3 State Key Laboratory of Millimeter Waves,Nanjing 2..096,China Key Laboratory of Wireless Communications of Jiangsu Province Nanjing University of Posts & Telecommunications College of Electronic Science & Engineering Nanjing University of Posts & Telecommunications State Key Laboratory of Millimeter Waves

In this study we propose a hybrid spectrum sharing scheme based on power control by combining Overlay with Underlay schemes,to improve radio spectrum *** the scheme,the secondary users dynamically switch their operational states between Overlay and Underlay according to the spectrum *** the dynamics of the primary network is first modeled with a discrete-state Markov process to find the time fraction of secondary users in the Overlay state and that in the Underlay state,which leads to the capacity model of the hybrid spectrum sharing *** the criterion of maximizing capacity,the power allocation of the cognitive network is researched and the optimum power allocation for secondary users is *** a result,the maximum achievable capacity of the cognitive network is *** are given to prove the analysis *** and simulated results indicate that hybrid spectrum sharing based on power control provides a higher capacity than single Overlay and Underlay systems for the cognitive network,i.e.,hybrid spectrum sharing can further improve radio spectrum efficiency.

关键词： cognitive radio network hybrid spectrum sharing primary network dynamics power allocation achievable capacity

A new DSmT combination rule in open frame of discernment and its application

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Science China(Information Sciences) 2012年第3期55卷 551-557页

作者： WEN ChengLin1, XU XiaoBin1,2.. JIANG HaiNa1 & ZHOU Zhe1 1School of Automation, Hangzhou DianZi University, Hangzhou 310018, China 2..partment of Automation and Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing 100049, China School of Automation Hangzhou DianZi University Department of Automation and Tsinghua National Laboratory for Information Science and Technology Tsinghua University

A new combination rule based on Dezert-Smarandache theory (DSmT) is proposed to deal with the conflict evidence resulting from the non-exhaustivity of the discernment frame. A two-dimensional measure factor in Dempster-Shafer theory (DST) is extended to DSmT to judge the conflict degree between evidence. The original DSmT combination rule or new DSmT combination rule can be selected for fusion according to this degree. Finally, some examples in simultaneous fault diagnosis of motor rotor are given to illustrate the effectiveness of the proposed combination rule.

关键词： DSmT rule of combination open frame of discernment evidence conflict simultaneous faults diagnosis generalized basic probability assignment

基于Lanczos双对角化的快速光声成像重建方法

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中国激光 2018年第3期45卷 165-173页

作者：张娜冯金超李哲贾克斌北京工业大学信息学部北京100124 先进信息网络北京实验室北京100124 北京工业大学未来网络科技高精尖创新中心北京100124

光声成像结合了光学成像和声成像的优点,是一种具有高空间分辨率、高对比度的无损成像技术,成为当前生物医学成像的研究热点之一。重建光声图像是一个典型的逆问题,具有严重的病态性。针对光声成像的病态性和较大的系统矩阵会导致重建... 详细信息

光声成像结合了光学成像和声成像的优点,是一种具有高空间分辨率、高对比度的无损成像技术,成为当前生物医学成像的研究热点之一。重建光声图像是一个典型的逆问题,具有严重的病态性。针对光声成像的病态性和较大的系统矩阵会导致重建速度慢的问题,提出了一种基于Lanczos双对角化的快速指数滤波重建方法,并通过数值仿真证实了该方法的有效性。仿真结果表明,所提方法在保证重建图像高质量的同时极大地提高了重建速度,其重建时间是指数滤波和后投影方法的1/67~1/47。

关键词：医用光学图像处理光声成像正则化指数滤波 Lanczos双对角化

Grey Markov chain and its application in drift prediction model of FOGs

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Journal of Systems Engineering and Electronics 2005年第2期16卷 388-393页

作者： Fan Chunling 1,2.. Jin Zhihua1, Tian Weifeng1 & Qian Feng11. Department of Information Measurement Technology and Instrument, Shanghai Jiaotong University,Shanghai 2..030, P. R. China 2..College of Automation and Electric Engineering, Qingdao University of Science and Technology,Qingdao 2..042..P. R. China Department of Information Measurement Technology and Instrument Shanghai Jiaotong University Shanghai 200030 P. R. China College of Automation and Electric Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China

A novel grey Markov chain predictive model is discussed to reduce drift influence on the output of fiber optical gyroscopes (FOGs) and to improve FOGs' measurement precision. The proposed method possesses advantages of grey model and Markov chain. It makes good use of dynamic modeling idea of the grey model to predict general trend of original data. Then according to the trend, states are divided so that it can overcome the disadvantage of high computational cost of state transition probability matrix in Markov chain. Moreover, the presented approach expands the applied scope of the grey model and makes it be fit for prediction of random data with bigger fluctuation. The numerical results of real drift data from a certain type FOG verify the effectiveness of the proposed grey Markov chain model powerfully. The Markov chain is also investigated to provide a comparison with the grey Markov chain model. It is shown that the hybrid grey Markov chain prediction model has higher modeling precision than Markov chain itself, which prove this proposed method is very applicable and effective.

关键词： grey model Markov chain FOG drift.

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高炉炼铁协同处理城市可燃固废

钢铁 2018年第3期53卷 1-9页

作者：龙红明魏汝飞李宁周笛孟庆民李家新冶金减排与资源综合利用教育部重点实验室(安徽工业大学) 安徽马鞍山243002 安徽工业大学冶金工程学院安徽马鞍山243002

日益增多的城市可燃固废给环境带来严重的污染,如何有效处理它们已经成为了一个重大问题。对可燃固废的化学成分、热值、燃烧特性及国内外的研究现状进行了论述,并基于城市可燃固废的理化性质和工艺性能提出了多种固废混合喷吹。多种固... 详细信息

日益增多的城市可燃固废给环境带来严重的污染,如何有效处理它们已经成为了一个重大问题。对可燃固废的化学成分、热值、燃烧特性及国内外的研究现状进行了论述,并基于城市可燃固废的理化性质和工艺性能提出了多种固废混合喷吹。多种固废混合喷吹既可以给高炉带来新的燃料,又可以处理种类繁多的城市可燃固废,完成对周边社会的固废处置,扩充城市钢厂的社会功能。

关键词：高炉废塑料废橡胶废布料餐厨固废城市固废