6-SPS并联机器人工作空间研究

主要研究6-SPS并联机器人的工作空间。认为，对于结构参数给定的6-SPS机构，在算法上采取数学分析法，可迅速准确地算出在考虑了杆的干涉等结构约束条件下定姿态可达空间和工作空间的边界曲线。同时，还考察了结构参数对工作空间的影响，得出一些规律性变化关系。     

平行研究之我见

本文从平行研究的定义、存在依据、研究途径三方面来论述作为比较文学研究方法之一的平行研究 ,从民间文学等学科的研究成果为平行研究的存在提供了合理性依据 ,在操作层面上 ,应当强调开放性、兼容性 ,注意深入了解两国的历史文化语境 ,借鉴外学科的研究成果 ,把握好同、异因素与比较的关系。     

Architecture Singularity Analysis of 4-U PS/U PU 5-DOF Parallel Mechanism

Architecture singularity of a parallel mechanism with five degrees of freedom (DOF) is analyzed. Such mechanism consists of a movable platform connected to the base by five active limbs. Four of them are identical 6-DOF limbs and the last one has the same DOF as the specified DOF of the movable platform. Based on the kinematics analysis, two categories of architecture singularities for such mechanism are proposed. Then the sufficient condition for each singularity is researched. Results show that the mechanism is singular when it employs each category of the proposed architecture, provided that it satisfies the corresponding sufficient condition. It can be concluded that the proposed two categories of architecture singularities should be avoided with the following dimension-al synthesis of such mechanism.     

基于多邻域的并行混合局部搜索算法与时间表问题

This paper presents a parallel composite local search algorithm based on multiple search neighborhoods to solve a special kind of timetable problem. The new algorithm can also effectively solve those problems that can be solved by general local search algorithms. Experimental results show that the new algorithm can generate better solutions than general local search algorithms.     

Design and Implementation of Parallel Virtual Machine on GM

1.1 BackgroundThe SU'HPCS (Shanghai Ufllverslty HighPerfor-mance Computing System) Is a 144-processorLlnux cluster constricted from commodity personalcomputer teChnology it is designed tO be dedicated tOhigh performance computing for computationalenglneenng and scientific problems We have nowconstructed many parallel environmentS m SUHPCS,such as MPll'], PVMI"'], BSP14], and DSMI'], as well asHPFI61, tO help users enroll their aPPlications intOParallel comPUting system But o…     

一种基于重排首次匹配算法的新颖并行Turbo译码器存储方案

In this paper we discuss a novel storage scheme for simultaneous memory access in parallel turbo decoder. The new scheme employs vertex coloring in graph theory. Compared to a similar method that also uses unnatural order in storage, our scheme requires 25 more memory blocks but allows a simpler configuration for variable sizes of code lengths that can be implemented on-chip. Experiment shows that for a moderate to high decoding throughput （40-100 Mbps）, the hardware cost is still affordable for 3GPP＇s （3rd generation partnership project） interleaver.     

数学问题的交叉关系和平行关系

对数学问题的交叉关系和平行关系进行了讨论，并利用交叉关系和平行关系的方法解决具体问题，以能够达到更好地揭示问题的本质．     

Dynamic Distribution Model with Prime Granularity for Parallel Computing

Dynamic distribution model is one of the best schemes for parallel volume rendering. However, in homogeneous cluster system, since the granularity is traditionally identical, all processors communicate almost simultaneously and computation load may lose balance. Due to problems above, a dynamic distribution model with prime granularity for parallel computing is presented. Granularities of each processor are relatively prime, and related theories are introduced, A high parallel performance can be achieved by minimizing network competition and using a load balancing strategy that ensures all processors finish almost simultaneously, Based on Master-Slave-Gleaner （ MSG） scheme, the parallel Splatting Algorithm for volume rendering is used to test the model on IBM Cluster 1350 system. The experimental results show that the model can bring a considerable improvement in performance, including computation efficiency, total execution time, speed, and load balancing.     

英语学习者平行语料库的建设及应用

本文探讨英语学习者英汉平行语料库的建设原则及其在教学中的应用,以期在真实语料的基础上研究学习者汉语思维对写作的影响,在学习者平行语料库的基础上分析母语迁移在学习者语言发展中的作用。     

串并联等效电路的几何分析

本文从几何角度分析无源二端网络的两种等效电路,说明两者等效的实质以及判断等效的方法.