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Theoretical research progress in new-generation Internet architecture

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science in china(Series F) 2008年第11期51卷 1634-1660页

作者： WU JianPing1,2,3,LIU ying2,3 & WU Qian2,3 1 department of computer science,tsinghua university,beij.ng 100084,china 2 Network Research Center,tsinghua university,beij.ng 100084,china 3 tsinghua National Laboratory for Information science and technology(TNList) ,beij.ng 100084,china 1. department of computer science Tsinghua University Beijing 100084 China 2. Network Research Center Tsinghua University Beijing 100084 China 3. tsinghua National Laboratory for Information science and technology (TNList) Beijing 100084 China

Internet has become the most important information infrastructure supporting modern socio-economic development, social progress and technological Innovation. Invented 30 years ago, today Internet is facing increasingly severe technical challenges. This paper introduces the progress of the major international newgeneration Internet research plans; analyzes its basic characteristics and the principal contradictions during the development; detsiledly introduces the research carried out by 973 Project ＂Research of Future Internet Architecture＂ on the key scientific issues of new-generation Internet architecture and its latest research results; and looks to the future of the research-focus faced with the new situations of the basic research of new-generation Internet architecture as well as the new demands of innovative applications on Internet architecture.

关键词： new-generation Internet network architecture multi-dimension scalability

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一种实时视景仿真中高度场地形绘制算法

系统仿真学报 2005年第1期17卷 83-86页

作者：见英叶榛清华大学计算机科学与技术系北京100084 智能技术与系统国家重点实验室北京100084

大地形的快速实时绘制对于虚拟现实、GIS、飞行模拟、游戏制作等方面的应用都有着重要意义。这方面,国内外算法主要集中在视点相关连续LOD(Level of Detail)上面。对已有算法进行了综合及改进,实现了一个简单快速的大地形绘制算法。算法... 详细信息

大地形的快速实时绘制对于虚拟现实、GIS、飞行模拟、游戏制作等方面的应用都有着重要意义。这方面,国内外算法主要集中在视点相关连续LOD(Level of Detail)上面。对已有算法进行了综合及改进,实现了一个简单快速的大地形绘制算法。算法中,视区剪裁采用"中点分割"的思想,结合了四又树剖分过程,提高了效率。误差控制方面,引入预处理及误差反馈的思想,并对误差进行扩散,加速了绘制同时保证了对地形细节的表现。算法对裂缝拼接也做了改进。算法运行结果良好,在普通微机上即可达到较高的帧速率和较好的绘制效果。

关键词：地形绘制多分辨率视区剪裁裂缝消除

Geo-Agents: Design and Implement

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Wuhan university Journal of Natural sciences 2001年第Z1期6卷 451-459页

作者： Ding Li, Qu Lei, Zhang ying, Luo ying wei, Wang Xiao lin, Xu Zhuo qun department of computer science & technology,Peking university, beij.ng 100871, china department of computer science & technology Peking University Beijing 100871 China

Geo Agents, a multi agent system that processes distributed geospatial information and geospatial service was presented. Firstly, the requirement for distributed geographical information process was discussed, and the architecture of Geo Agents was introduced. Then in depth discussions were raised on agent system implementation, such as the basic agent, agent advertising, message passing, and collaborating. An example was also given to explain the problem solving process.

关键词： geographical information system (GIS) multi agent system (MAS) Geo Ggents communication collaboration

A Parallel Multicomputer Simulation System

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Journal of Systems Engineering and Electronics 1995年第3期6卷 30-40页

作者： Chen Delai Wang Chen Zhou ying & Zhang Defu(department of computer science and technologyNaming university, Naming 210093, P.R. china) department of computer science and technology Nanjing university Nanjing 210093 P.R. China

In this paper, a homogenous parallel simulation system is presented in detail for continuous--system simulation. The system is collstructed by a host computer and I I transputers connected into a topologyof 'Super--Node' which is very suitable for simulation of stiff systems. An automatic software interface runin the host is developed to partition simulation model, either equations or block diagrams, into several equitable segments and then pack them into parallel simulation program to be executed in the parallel *** interface frees simulation users from parallel programming to focus on their simulation experiments.

关键词： Multicomputer system Continuous-system simulation Parallel simulation

Identification of human microRNA-disease association via low-rank approximation-based link propagation and multiple kernel learning

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Frontiers of computer science 2024年第2期18卷 217-229页

作者： Yizheng WAng Xin ZHAng ying JU Qing LIU Quan ZOU Yazhou ZHAng Yijie DIng ying ZHAng Institute of Fundamental and Frontier sciences University of Electronic Science and Technology of ChinaChengdu 610054China Yangtze Delta Region Institute(Quzhou) University of Electronic Science and Technology of ChinaQuzhou 324000China Beidahuang Industry Group General Hospital Harbin 150088China School of Informatics Xiamen UniversityXiamen 361005China department of Anesthesiology Hospital(T.C.M)Affiliated to Southwest Medical UniversityLuzhou 646000China Software Engineering College Zhengzhou University of Light IndustryZhengzhou 450002China

Numerous studies have demonstrated that human microRNAs(miRNAs)and diseases are associated and studies on the microRNA-disease association(MDA)have been *** developed a model using a low-rank approximation-based link propagation algorithm with Hilbert–Schmidt independence criterion-based multiple kernel learning(HSIC-MKL)to solve the problem of the large time commitment and cost of traditional biological experiments involving miRNAs and diseases,and improve the model *** constructed three kernels in miRNA and disease space and conducted kernel fusion using *** propagation uses matrix factorization and matrix approximation to effectively reduce computation and time *** results of the experiment show that the approach we proposed has a good effect,and,in some respects,exceeds what existing models can do.

关键词： human miRNA-disease association multiple kernel learning link propagation miRNA similarity disease similarity

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单栋建筑室外热环境的模拟计算方法

太阳能学报 2004年第1期25卷 6-12页

作者：于震李先庭李莹赵彬清华大学建筑技术和科学系北京100084

建筑室外热环境模拟计算是住区微气候研究的重要内容。本文提出了将求解建筑物和周围下垫面的热平衡方程组与室外空气场的CFD(Computational Fluid Dynamics)模拟计算相结合的方法,解决了空气场计算时间步长与建筑物以及下垫面计算时间... 详细信息

建筑室外热环境模拟计算是住区微气候研究的重要内容。本文提出了将求解建筑物和周围下垫面的热平衡方程组与室外空气场的CFD(Computational Fluid Dynamics)模拟计算相结合的方法,解决了空气场计算时间步长与建筑物以及下垫面计算时间步长不一致的问题。并提出将下垫面温度简化为逐时太阳直射区域温度和日影区域温度的方法,降低了CFD计算的复杂程度。该数值方法可以得到在自然条件作用下,建筑物表面和下垫面表面的逐时温度及空气温度与流动情况。计算结果与实验结果吻合较好,说明所提出的计算方法是有效的。

关键词：微气候下垫面日影数值模拟

Laplacian smoothing transform for face recognition

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science china(Information sciences) 2010年第12期53卷 2415-2428页

作者： GU SuiCheng, TAN ying & HE Xingui Key Laboratory of Machine Perception (MOE) department of Machine Intelligence, School of Electronics Engineering and computer science Peking university, beij.ng 100871, china 1. Key Laboratory of Machine Perception (MOE) department of Machine Intelligence School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

In this paper, we investigate how to extract the lowest frequency features from an image. A novel Laplacian smoothing transform (LST) is proposed to transform an image into a sequence, by which low frequency features of an image can be easily extracted for a discriminant learning method for face recognition. Generally, the LST is able to be an efficient dimensionality reduction method for face recognition problems. Extensive experimental results show that the LST method performs better than other pre-processing methods, such as discrete cosine transform (DCT), principal component analysis (PCA) and discrete wavelet transform (DWT), on ORL, Yale and PIE face databases. Under the leave one out strategy, the best performance on the ORL and Yale face databases is 99.75% and 99.4%; however, in this paper, we improve both to 100% with a fast linear feature extraction method for the first time.

关键词： Laplacian smoothing transform (LST) face recognition principal component analysis (PCA) discrete cosine transform (DCT) discrete wavelet transform (DWT) linear discriminant analysis (LDA)

Improved performance of GaN-based light-emitting diodes by using short-period superlattice structures

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Progress in Natural science:Materials International 2010年第1期20卷 70-75页

作者： Yi-jung LIU~1,Chien-chang HUAng~1,Tai-you CHEN~1,Chi-shiang HSU~1,Shiou-ying CHEng~2, Kun-wei LIN~3,Jian-kai LIOU~1,Wen-chau LIU~1 1.Institute of Microelectronics,department of Electrical Engineering,National Cheng-Kung university, Tainan 70101,Taiwan,china 2.department of Electronic Engineering,Nation Ilan university,I-Lan 26041,Taiwan,china 3.department and Graduate Institute of computer science and Information Engineering, Chaoyang university of technology,Taichung 41349,Taiwan,china [a] Institute of Microelectronics Department of Electrical Engineering National Cheng-Kung University Tainan 70101 Taiwan China [b] department of Electronic Engineering Nation Ilan University I-Lan 26041 Taiwan China [c] department and Graduate Institute of computer science and Information Engineering Chaoyang University of Technology Taichung 41349 Taiwan China

An IngaN/GaN multiple-quantum-well（MQW）light-emitting diode（LED）with a ten-period i（undoped）-IngaN/p（Mg doped）-GaN（2.5 nm/5.0 nm）superlattice（SL）structure,was *** SL structure that can be regarded as a confinement layer of holes to enhance the hole injection efficiency is inserted between MQW and p-GaN *** studied LED device exhibits better current spreading performance and an improved quality,compared with a conventional one without SL *** to the reduced contact resistance as well as more uniformity of carriers injection,the operation voltage at 20 mA is decreased from 3.32 to 3.14 V.A remarkably reduced reverse-biased leakage current(10-7-10-9A)and higher endurance of the reverse current pulse are *** measured output power and external quantum efficiency（EQE）of the studied LED are 13.6 mW and 24.8%,respectively. In addition,significant enhancement of 25.4%in output power as well as increment of 5%in EQE for the studied devices is observed, as the studied devices show superior current spreading ability and reduction in dislocations offered by the SL structure.

关键词： GaN superlattice(SL) current spreading hole confinement electrostatic discharge(ESD)

△-tame quasi-hereditary algebras

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science china Mathematics 2007年第2期50卷 240-252页

作者： Yun-ge XU & ying-bo ZHAng Faculty of Mathematics and computer science, Hubei university, Wuhan 430062, china School of Mathematics sciences, beij.ng Normal university, beij.ng 100875, china Faculty of Mathematics and computer science Hubei University Wuhan China School of Mathematics sciences Beijing Normal University Beijing China

Let (K, M,H) be an upper triangular bimodule problem. Briistle and Hille showed that the opposite algebra A of the endomorphism algebra of a projective generator P of the matrices category of (K., M, H) is quasi-hereditary, and there is an equivalence between the category of△-good modules of A and Mat(K, M). In this note, based on the tame theorem for bimodule problems, we show that if the algebra A associated with an upper triangular bimodule problem is of△-tame representation type, then the category F(△) has the homogeneous property, i.e. almost all modules in F(△) are isomorphic to their Auslander-Reiten translations. Moreover, if (K, M,H)is an upper triangular bipartite bimodule problem, then A is of△-tame representation type if and only if F(△) is homogeneous.

关键词： bimodule problem quasi-hereditary algebra △-tameness homogeneity.