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BCL/IP:机群系统域网中TCP/IP协议的实现

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计算机工程与应用 2003年第34期39卷 180-183页

作者：高帆马捷孟丹国家智能计算机研究开发中心

论文介绍了基于BCL机群底层通信协议的高性能TCP/IP通信(BCL/IP)在机群系统域网(SANs)中的设计与实现方法。作为曙光4000L超级服务器系统的重要组成部分,BCL/IP在充分发挥底层高效BCL协议和高速Myrinet网络性能的同时,还实现了同现有多... 详细信息

论文介绍了基于BCL机群底层通信协议的高性能TCP/IP通信(BCL/IP)在机群系统域网(SANs)中的设计与实现方法。作为曙光4000L超级服务器系统的重要组成部分,BCL/IP在充分发挥底层高效BCL协议和高速Myrinet网络性能的同时,还实现了同现有多数网络应用程序的二进制兼容。最后给出了Linux平台上BCL/IP的性能测试结果和简要分析。另外还提供了一种在对系统核心不做(或尽可能小)修改的前提下利用现有底层通信协议在机群系统域网中实现高性能TCP/IP协议的方法。

关键词：机群 BCL TCP/IP Myrinet

A Performance Analysis Tool for PVM Parallel Programs

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计算机工程与应用 2004年第29期40卷 103-105,112页

作者： ChenWang YinLiu ChangjunJiang ZhaoqingZhang DepartmentofComputerscience TongjiUniversityShanghai200092 TongjicenterofnationalEngineeringResearchcenterforHighPerformanceComputer Shanghai200092 instituteofcomputingtechnology ChineseAcademyofScienceBeijing100080

In this paper,we introduce the design and implementation of ParaVT,which is a visual performance analysis and parallel debugging *** ParaVT,we propose an automated instrumentation *** on this mechanism,ParaVT automatically analyzes the performance bottleneck of parallel applications and provides a visual user interface to monitor and analyze the performance of parallel *** addition,it also supports certain extensions.

关键词：自动化仪表性能分析可视化并行调试瓶颈问题分析并行虚拟仪器

相匹配滤波与频率域维纳滤波结合在地震信号处理中的应用

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数值计算与计算机应用 2004年第1期25卷 3-12页

作者：洪学海中科院计算技术研究所国家智能计算机研究开发中心

The surface wave signals produced in natural seismic are “intact“ and complex, it is the key which eliminating the noise from that signals if we wanted to invert the structure of the earth using the true signal which the earth *** inter-station fundamental-mode surface wave attenuation coefficient was calculated combined the phase-match filter with frequency-domain Wiener filter. The first, we separated the fundamental-mode surface wave from different two original signal which recorded on two stations which are on one big-circle path using phase-matched filter, and then calculating the attenuation coefficient using frequency domain Wiener filter. It is avoided the negative attenuation coefficient that can't be explained. All of this are the base of inverting the inter structure of the earth.

关键词：相匹配滤波频率域维纳滤波衰减系数地震信号信号处理 Gauss函数

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曙光超级服务器上DMPI和DPVM的设计

计算机工程与应用 2003年第25期39卷 127-131页

作者：赵毅王哲马捷国家智能计算机研究开发中心中国科学院计算技术研究所北京100080 中国科学院研究生院北京100039

介绍了运行于曙光超级服务器上的DMPI和DPVM的设计与实现。DMPI支持RMA和动态进程管理的功能。DMPI和DPVM在对ADI层进行灵活有效的扩展(DADI-E)的基础上提供了一个高性能的通信层。该文对DADI-E的特点进行了阐述,包括RMA机制、动态进程... 详细信息

介绍了运行于曙光超级服务器上的DMPI和DPVM的设计与实现。DMPI支持RMA和动态进程管理的功能。DMPI和DPVM在对ADI层进行灵活有效的扩展(DADI-E)的基础上提供了一个高性能的通信层。该文对DADI-E的特点进行了阐述,包括RMA机制、动态进程管理和对PVM的支持。而且,DMPI还提供了一个特殊的数据通路———流水发送,它可以改善DMPI的带宽,使之接近于底层通信协议的带宽峰值。最后还给出了DMPI和DPVM在Myinet卡上的性能指标。

关键词： RMA 动态进程管理 ADI扩展流水发送

Efficient DPCA SAR imaging with fast iterative spectrum reconstruction method

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science china(Information sciences) 2012年第8期55卷 1838-1851页

作者： FANG Jian1,ZENG JinShan1,XU ZongBen1&ZHAO Yao2 1M inistry of Education Key Lab for intelligent Networks and Network Security Xi'an Jiaotong University,Xi'an 710049,china 2N ational Key Laboratory of science and technology on Microwave Imaging&institute of Electronics,chinese academy of sciences,beijing 100049,china 1. Ministry of Education Key Lab for intelligent Networks and Network Security Xi’an Jiaotong University Xi’an 710049 China2. National Key Laboratory of Science and Technology on Microwave Imaging & Institute of Electronics Chinese Academy of Sciences Beijing 100049 China

The displaced phase center antenna(DPCA)technique is an effective strategy to achieve wide-swath synthetic aperture radar(SAR)imaging with high azimuth ***,traditionally,it requires strict limitation of the pulse repetition frequency(PRF)to avoid non-uniform ***,any deviation could bring serious ambiguity if the data are directly processed using a matched *** break this limitation,a recently proposed spectrum reconstruction method is capable of recovering the true spectrum from the nonuniform ***,the performance is sensitive to the selection of the *** regularization based imaging may provide a way to overcome this *** existing time-domain method,however,requires a large-scale observation matrix to be built,which brings a high computational *** this paper,we propose a frequency domain method,called the iterative spectrum reconstruction method,through integration of the sparse regularization technique with spectrum analysis of the DPCA *** approximately expressing the observation in the frequency domain,which is realized via a series of decoupled linear operations,the method performs SAR imaging which is then not directly based on the observation matrix,which reduces the computational cost from O(N2)to O(N log N)(where N is the number of range cells),and is therefore more efficient than the time domain *** sparse regularization scheme,realized via a fast thresholding iteration,has been adopted in this method,which brings the robustness of the imaging process to the PRF *** provide a series of simulations and ground based experiments to demonstrate the high efficiency and robustness of the *** simulations show that the new method is almost as fast as the traditional mono-channel algorithm,and works well almost independently of the PRF ***,the suggested method can be accepted as a practical and efficient wide-swath SAR imaging technique.

关键词： displaced phase center antenna sparse regularization iterative thresholding spectrum reconstruction

Generalized Projective Synchronization Between Rssler System and New Unified Chaotic System

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Communications in Theoretical Physics 2007年第7期 132-136页

作者： LI Xin CHEN Yong1 Nonlinear science center and Department of Mathematics,Ningbo University,Ningbo 315211,china2 institute of Theoretical computing,East china Normal University,Shanghai 200062,china3 Key Laboratory of Mathematics and Mechanization,the chinese academy of sciences,beijing 1.0080,china

Based on symbolic computation system Maple and Lyapunov stability theory,an active control method isused to projectively synchronize two different chaotic systems—Lorenz-Chen-Lü system(LCL)and Rssler system,which belong to different dynamic *** this paper,we achieve generalized projective synchronization between thetwo different chaotic systems by directing the scaling factor onto the desired value *** illustrate our result,numerical simulations are used to perform the process of the synchronization and successfully put the orbits of drivesystem(LCL)and orbits of the response system(Rssler system)in the same plot for understanding intuitively.

关键词： Rssler system Lorenz-Chen-Lü system generalized projective synchronization scaling factor active control

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机群系统的智能配置管理

计算机工程与应用 2004年第9期40卷 29-32页

作者：韦华颖詹剑锋王磊王沁北京科技大学信息工程学院计算机系中国科学院计算技术研究所国家智能中心北京100080

该文主要讨论了基于曙光4000A机群系统的智能配置管理的设计和实现。智能配置管理基于服务和构件的设计思想和机群系统四层软件体系结构。通过采用实时事件管理,它实现了准确、及时、主动、智能的信息服务,同时还提供了许多优良的特性,... 详细信息

该文主要讨论了基于曙光4000A机群系统的智能配置管理的设计和实现。智能配置管理基于服务和构件的设计思想和机群系统四层软件体系结构。通过采用实时事件管理,它实现了准确、及时、主动、智能的信息服务,同时还提供了许多优良的特性,包括服务高可用性、良好的可扩展性、包容性和自动角色转换等。

关键词：配置管理机群系统服务构件智能

Study on Internet of Things application for Highspeed Train Maintenance,Repair and Operation（MRO）

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Study on Internet of Things application for Highspeed Train ...

A draft sequence of the rice (Oryza sativa ssp. indica) genome

2012 national Conference on Information technology and Computer science

作者： Weijiao ZHANG institute of computing technology china academy of Railway sciences beijing,china

the design of EMU IoT-system,which is oriented to the MRO of high-speed trains,was studied with implementations of sensing technologies like RFID,sensors,etc;with regarding to the future requirements of safety,orderly,efficient and high-quality in EMU maintenance service of *** operation:massive seamless embedded RFID tags and sensors,on the basis of trainground transmission network,perceive running and defects status of high-speed train in real-time;realizing holographic train visualization and transit *** maintenance and repair:multisource and multilevel raw data,from the collection of various production aspects such as trains flow,parts flow,labor jobs flow and equipments,monitor productive process and logistics of train maintenance in total life *** general framework and detailed technical solution were presented in this paper;for the efficient processing of raw data,a semantic analysis measure driven by complex event mechanism was introduced;finally,a quantitative evaluation of productivity upgrading owing to IoT was *** RFID applications involved are running or experienced pilot tests in factory environment.

关键词： intelligent transportation internet of things (IoT) high-speed trian semantic analysis complex event processing

来源： cnki会议评论

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chinese science Bulletin 2001年第23期46卷 1937-1942页

作者： YU Jun, HU Songnian, WANG Jun,LI Songgang WONG Ka-Shu Gane, LIU Bin,DENG Yajun, DAI Li, ZHOU Yan,ZHANG Xiuqing, CAO Mengliang, LIU Jing,SUN Jiandong , TANG Jiabin, CHEN Yanjiong,HUANG Xiaobing, LIN Wei, YE Chen, TONG Wei,CONG Lijuan, GENG Jianing, HAN Yujun, LI Lin,LI Wei, HU Guangqiang, HUANG Xiangang,LI Wenjie, LI Jian, LIU Zhanwei, LI Long,LIU Jianping, Ql Qiuhui, LIU Jinsong, LI Li,WANG Xuegang, LU Hong, WU Tingling,ZHU Miao, Nl Peixiang, HAN Hua, DONG Wei,REN Xiaoyu, FENG Xiaoli, GUI Peng,LI Xianran, WANG Hao, XU Xin, ZHAI Wenxue,XU Zhao, ZHANG Jinsong, HE Sijie,ZHANG Jianguo, XU Jichen, ZHANG Kunlin,ZHENG Xianwu, DONG Jianhai, ZENG Wanyong,TAO Lin, CHEN Xuewei, HE Jun, LIU Daofeng,TIAN Wei, TIAN Chaoguang, XIA Hongai,LI Gang, GAO Hui, LI Ping, CHEN Wei ,WANG Xudong, ZHANG Yong, HU Jianfei,WANG Jing, LIU Song, YANG Jian,ZHANG Guangyu, XIONG Yuqing, LI Zhijie,MAO Long, ZHOU Chengshu, ZHU Zhen,CHEN Runsheng, HAO Bailin,ZHENG Weimou, CHEN Shouyi, QUO Wei,LI Guojie, LIU Siqi, HUANG Guyang,TAO Ming, WANG Jian, ZHU Lihuang,YUAN Longping& YANG Huanmingbeijing Genomics institute/center of Genomics & Bioinformatics, chinese academy of sciences, beijing 101300, china Hangzhou Genomics institute/institute of Bioinformatics of Zhejiang University/Key Laboratory of Bioinformatics of Zhejiang Province, Hangzhou 310007, china institute of Genetics, chinese academy of sciences, beijing 100101, china national Hybrid Rice R & D center, Changsha 410125, china Laboratory of Bioinformatics, institute of Biophysics, chinese academy of sciences, beijing 100101, china College of Life sciences, Peking University, beijing 100871, china institute of Theoretical Physics, chinese academy of sciences, beijing 1.0080, china Digital china Ltd., beijing 1.0080, china institute of computing technology, chinese academy of sciences, beijing 1.0080, china Medical College, Xi’an Jiaotong University, Xi’an 710061, chinaThese authors contributed equally to this work.Corresponding author.Corresponden beijing Genomics institute/center of Genomics & Bioinformatics Chinese Academy of Sciences Beijing China Hangzhou Genomics institute/institute of Bioinformatics of Zhejiang University/Key Laboratory of Bioinformatics of Zhejiang Province Hangzhou China College of Life sciences Peking University Beijing China Medical College Xi’an Jiaotong University Xi’an China institute of Genetics Chinese Academy of Sciences Beijing China Laboratory of Bioinformatics Institute of Biophysics Chinese Academy of Sciences Beijing China national Hybrid Rice R & D center Changsha China institute of Theoretical Physics Chinese Academy of Sciences Beijing China Digital china Ltd. Beijing China institute of computing technology Chinese Academy of Sciences Beijing China

The sequence of the rice genome holds fundamental information for its biology, including physiology, genetics, development, and evolution, as well as information on many beneficial phenotypes of economic significance. Using a "whole genome shotgun" approach, we have pro-duced a draft rice genome sequence of Oryza sativa ssp. in-dica, the major crop rice subspecies in china and many other regions of Asia. The draft genome sequence is constructed from over 4.3 million successful sequencing traces with an accumulative total length of 2214.9 Mb. The initial assembly of the non-redundant sequences reached 409.76 Mb in length, based on 3.30 million successful sequencing traces with a total length of 1797.4 Mb from an indica variant cultivar 93-11, giving an estimated coverage of 95.29% of the rice genome with an average base accuracy of higher than 99%. The coverage of the draft sequence, the randomness of the sequence distribution, and the consistency of BIG-ASSEM-BLER, a custom-designed software package

关键词： rice genome draft sequences.