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Study on mechanical parameters of fractured rock masses

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Science China(technological Sciences) 2011年第S1期54卷 140-146页

作者： CHEN WeiZhong 1,2.YANG JianPing 1,TAN XianJun 1 &YU HongDan 1 1 State Key Laboratory of Geomechanics and Geotechnical engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China 2.research {2. of Geotechnical and Structural engineering,Shandong University,Jinan 2.0061,China 1. State Key Laboratory of Geomechanics and Geotechnical engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan 430071 China2. Research Center of Geotechnical and Structural Engineering Shandong University Jinan 250061 China

The equivalent strength parameters of fractured rock masses are prerequisite for stability analysis of geotechnical engineering projects constructed in fractured rock masses which are encountered frequently in western *** on generated mesh of fractured rock masses,combined with statistic damage constitutive model of intact rock and damage model of structural plane,progressive failure of fractured rock masses is studied using finite element method(FEM) .Furthermore,Scale effect and anisotropy of compressive strength of fractured rock masses are *** results show that the strength decreases and tend towards stability rapidly from intact rock to fractured rock masses,and the anisotropy of strength of fractured rock masses is not *** last,based on numerical simulation conducted on 10 m scale rock masses under different confining pressures,the equivalent strength parameters of fractured rock masses are gained and the results are compared with Hoek-Brown *** method developed is helpful for determination of strength parameters of fractured rock masses.

关键词： rock mechanics fractured rock masses equivalent strength parameters finite element method scale effect anisotropy

A new navigation approach of terrain contour matching based on 3-D terrain reconstruction from onboard image sequence

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Science China(technological Sciences) 2010年第5期53卷 1176-1183页

作者： LI LiChun1,2.YU QiFeng2.SHANG Yang2.YUAN Yun2.LU HongWei3 & LIU XiaoLin4 1 Beijing Aerospace Control center,Beijing 100094,China 2.College of Aerospace and Material engineering,{2. University of Defense Technology,Changsha 410073,China 3 Equipment research Institute of PLA’s Second Artillery,Beijing 100085,China 4 College of Mechatronic engineering and Automation,{2. University of Defense Technology,Changsha 410073,China 1. Beijing Aerospace Control center Beijing 100094 China2. College of Aerospace and Material Engineering National University of Defense Technology Changsha 410073 China3. Equipment Research Institute of PLA’s Second Artillery Beijing 100085 China4. College of Mechatronic Engineering and Automation National University of Defense Technology Changsha 410073 China

This article presents a passive navigation method of terrain contour matching by reconstructing the 3-D terrain from the image sequence(acquired by the onboard camera).To achieve automation and simultaneity of the image sequence processing for navigation,a correspondence registration method based on control points tracking is proposed which tracks the sparse control points through the whole image sequence and uses them as correspondence in the relation geometry ***,a key frame selection method based on the images overlapping ratio and intersecting angles is explored,thereafter the requirement for the camera system configuration is *** proposed method also includes an optimal local homography estimating algorithm according to the control points,which helps correctly predict points to be matched and their speed ***,the real-time 3-D terrain of the trajectory thus reconstructed is matched with the referenced terrain map,and the result of which provides navigating *** digital simulation experiment and the real image based experiment have verified the proposed method.

关键词： terrain contour matching vision-based navigation 3-D reconstruction control points key frame registration optimal local homography

多用户MIMO系统基于消息块预编码的可信通信技术

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通信学报 2012年第3期33卷 155-162页

作者：朱耀朱义君张水莲刘永刚国家数字交换系统工程技术研究中心 61580部队

针对多用户MIMO窃听信道,提出了在未知非法接收者任何信息的前提下,实现可信通信的基于消息块的人为干扰和预编码算法,并且在实现可信通信"可信性"的同时,考虑了"有效性"和"效率"问题。人为干扰仅干扰非法接收者,而不对合法接收者产生... 详细信息

针对多用户MIMO窃听信道,提出了在未知非法接收者任何信息的前提下,实现可信通信的基于消息块的人为干扰和预编码算法,并且在实现可信通信"可信性"的同时,考虑了"有效性"和"效率"问题。人为干扰仅干扰非法接收者,而不对合法接收者产生任何影响。预编码算法是已有的用于消除多用户干扰的"迫零"方式与基于SVD分解的线性预编码方式的结合。与基于单消息符号的预编码方式相比,提高了可信通信的效率。仿真结果表明,其进一步降低了非法接收者的SINR,并提高了多用户MIMO系统的通信容量。

关键词： MIMO 预编码可信通信人为干扰

A New Method of Loop Performance Analysis

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A New Method of Loop Performance Analysis

Blind separation of the single-channel mixed signal Based on BICM-ID

2.11 IEEE International Conference on Computer Science and Automation engineering(CSAE 2.11)

作者： HAO Yun-long national digital {2. system engineering & technological research center Zhengzhou China ZHAO Rong-cai HAN Lin ZHU Jia-feng

＜正＞It is difficult to complete the accurate analysis of loop performance using current *** method uses the idea of feedback optimization,combined with some static analysis method,without the support of hardware *** result manifest that the method can complete accurate loop-level performance analysis,help the programmers finding the hot-spot and analyzing the program.

关键词： feedback-directed compiling loop-level spot program analysis open64

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Blind separation of the single-channel mixed signal Based on...

Dam risk assistant analysis system design

2.12.IEEE International Conference on Computer Science and Automation engineering（CSAE 2.12.

作者： Zhang Dong-ling Xu Yi-qiong Zhang Jun Ge Lin-dong national digital {2. system engineering & technological research center Zhengzhou 450002.china

The paper focuses on blind separation of the single-channel mixed signal which is an important and touchy issue in uncooperative *** algorithm based on bit-interleaved code modulation iterative decoder （BICM-ID） scheme is proposed in the paper which joints demapping and decoding and can recover multi-path source signals from a single-channel mixed *** new algorithm for demapping of mixed signals is provided based on theoretical analysis and mathematical *** analysis and simulation results show that the local algorithm can directly recover all the source signals from a single-channel mixed signal without separating the mixed *** advantages of the algorithm are low computational complexity,lower BER for both non-ISI,ISI AWGN channels,and suitable for the situations of equivalent as well as non-equivalent power mixed signals.

关键词： blind separation Single-channel BICM-ID Paired Carrier Multiple Access (PCMA)

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Science China(technological Sciences) 2008年第S2期51卷 101-109页

作者： HE XianFeng1,2.3,GU ChongShi3,4,WU ZhongRu3,4 & SU HuaiZhi3,4 1 Yellow River Institute of Hydraulic research,Zhengzhou 450003,China 2.Embankment Security Defect Prevention and Control engineering research center of MWR,Zhengzhou 45000,China 3 College of Water Resources and Hydropower engineering,Hohai University,Nanjing 2.0098,China 4 national engineering research center of Water Resources Efficient Utilization and engineering Safety,Hohai University,Nanjing 2.0098,China Yellow River Institute of Hydraulic research Zhengzhou 450003 China Embankment Security Defect Prevention and Control engineering research {2. of MWR Zhengzhou 45000 China College of Water Resources and Hydropower engineering Hohai University Nanjing 210098 China national engineering {2. center of Water Resources Efficient Utilization and engineering Safety Hohai University Nanjing 210098 China

In order to reduce the labor intensity and task difficulty of dam risk analysis and to meet the actual requirement of dam risk analysis,it is necessary to establish a dam risk assistant analysis *** program structure and the implementation ways of the dam risk assistant analysis system are analyzed,and a procedural framework with "three-tier and multi-database" structure and "level structure" is *** concept of dam risk assessment system modular development is proposed and the coupled mode of function module and data is ***,the dam risk assistant analysis system is developed using Delphi visual programming language.

关键词： dam risk risk analysis assistant analysis system

Mechanical behavior of a shelter system based on cable-strut structures

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2012年第12期13卷 895-903页

作者： Jian-guo CAI1,2.Ya ZHOU1,Jian FENG1,2.Yi-xiang XU3 (1Key Laboratory of C&PC Structures of Ministry of Education,Southeast University,Nanjing 2.0096,China) (2.0} Prestress engineering {2. center,Southeast University,Nanjing 2.0096,China) (3Department of Civil engineering,Strathclyde University,Glasgow,UK) 1. Key Laboratory of C&PC Structures of Ministry of Education Southeast University Nanjing 210096 China 2. national Prestress engineering {2. center Southeast University Nanjing 210096 China 3. Department of Civil engineering Strathclyde University Glasgow UK

A shelter system based on cable-strut structures,consisting of compressive struts and high-tensile elements,is described in this *** deployment of the shelter is achieved by tightening inclined *** cables are used to terminate the *** state of self-stress of the cable-strut structures in the fully deployed configuration is given,and the minimum strut length and the maximum load design of the shelter are *** mechanical behavior of the system was studied under symmetrical and asymmetrical load *** results show that the shelter in the deployed configuration satisfies the ultimate limit and the serviceability limit state ***,the stability of the cable-strut system is investigated,considering the effect of imperfections on the buckling of the *** conclude that the influence of imperfections based on the consistent imperfection mode method is not significant.

关键词： Foldable structures Cable-strut structures Mechanical behavior Self-stress Stability

Progress in the detection of human genome structural variations

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Science China(Life Sciences) 2009年第6期52卷 560-567页

作者： WU XueMei1,3 & XIAO HuaSheng1,2.1 center of Functional Genomics,Key Laboratory of system Biology,Shanghai Institutes for Biological Sciences,Chinese Academy of Sciences,Shanghai 2.0031,China 2.{2. engineering center for Biochip at Shanghai,Shanghai 2.12.3,China 3 Graduate School of the Chinese Academy of Sciences,Shanghai 2.0031,China 1. center of Functional Genomics Key Laboratory of System Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China 3. Graduate School of the Chinese Academy of Sciences Shanghai 200031 China 2. national engineering {2. for Biochip at Shanghai Shanghai 201203 China

The emerging of high-throughput and high-resolution genomic technologies led to the detection of submicroscopic variants ranging from 1 kb to 3 Mb in the human *** variants include copy number variations(CNVs),inversions,insertions,deletions and other complex rearrangements of DNA *** paper briefly reviews the commonly used technologies to discover both genomic structural variants and their potential ***,we highlight the array-based,PCR-based and sequencing-based assays,including array-based comparative genomic hybridization(aCGH),representational oligonucleotide microarray analysis(ROMA),multiplex amplifiable probe hybridization(MAPH),multiplex ligation-dependent probe amplification(MLPA),paired-end mapping(PEM),and next-generation DNA sequencing ***,we discuss the limitations and challenges of current assays and give advices on how to make the database of genomic variations more reliable.

关键词： structural variation cytogenetic microarray PCR paired end mapping(PEM) next-generation sequencing

research and realization of the parallel processing of Geant4 in Monte Carlo particle transport

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Research and realization of the parallel processing of Geant...