基于S3C2410数据采集系统的人机接口电路设计

介绍了数据采集系统终端中人机接口硬件电路的设计,详细提供了液晶显示器和触摸屏模块的设计电路。通过具体分析人机交互的工作原理,采用三星公司开发的一款以ARM920T为核心的16/32位嵌入式处理器S3C2410为开发平台,该处理器主要面向终端设备以及高性价比、低功耗的开发应用。拥有亮度高、体积小、功耗低等优势的液晶显示器以及使用方便、操作简单的触摸屏被广泛应用于数据采集系统中。     

An architecture framework for an adaptive extensible processor

To improve the performance of embedded processors, an effective technique is collapsing critical computation subgraphs as application-specific instruction set extensions and executing them on custom functional units. The problem with this approach is the immense cost and the long times required to design a new processor for each application. As a solution to this issue, we propose an adaptive extensible processor in which custom instructions (CIs) are generated and added after chip-fabrication. To support this feature, custom functional units are replaced by a reconfigurable matrix of functional units (FUs). A systematic quantitative approach is used for determining the appropriate structure of the reconfigurable functional unit (RFU). We also introduce an integrated framework for generating mappable CIs on the RFU. Using this architecture, performance is improved by up to 1.33, with an average improvement of 1.16, compared to a 4-issue in-order RISC processor. By partitioning the configuration memory, detecting similar/subset CIs and merging small CIs, the size of the configuration memory is reduced by 40%.     

一种面向非平衡数据的邻居词特征选择方法

在非平衡数据情况下,由于传统特征选择方法,如信息增益(Information Gain,IG)和相关系数(Correlation Coefficient,CC),或者不考虑负特征对分类的作用,或者不能显式地均衡正负特征比例,导致特征选择的结果下降.本文提出一种新的特征选择方法(Positive-Negative feature selection,PN),用于邻居词的选择,实现了文本中术语的自动抽取.本文提出的PN特征选择方法和CC特征选择方法相比,考虑了负特征;和IG特征选择方法相比,从特征t出现在正(负)训练文本的文本数占所有出现特征t的训练文本数比例的角度,分别显式地均衡了正特征和负特征的比例.通过计算特征t后面所跟的不同(非)领域概念个数占总(非)领域概念个数比值分别考察正、负特征t的重要性,解决了IG特征选择方法正特征偏置问题.实验结果表明,本文提出的PN特征选择方法优越于IG特征选择方法和CC特征选择.     

合同战术训练评估系统体系结构

在介绍合同战术训练评估需求分析、系统总体结构的基础上,研究了其中的演习结果评估子系统的框架和层次结构,横向上将其分为主框架、行动评估模块、算法插件3个部分,纵向上把它分为数据采集、数据处理、成绩报告3层,从而有效地降低了系统各组成部分间的耦合程度,并使系统能综合运用多样化的数据采集手段以及效能分析方法,具有一定的参考价值。     

题库管理系统中OLE技术对WORD的控制实现

介绍了在Delphi环境下基于OLE技术和WORD对象模型实现通用题库中试题和试卷编辑、浏览的基本原理,并在此基础上给出了具体的实现过程。     

基于全文检索的Segmenter分词算法改进

流行的Segmenter分词算法是开放的java源代码,它是一个很好的分词工具。但是,在全文检索系统中对分词有特殊的要求,例如歧义包客、专业词典等。所以在这里将Segmenter词典和算法都进行了改选,建立了树状词典,在匹配算法中使用了歧义包容法则、分支处理、动态规划和词库预载入。以适应电子商务案例全文检索系统。     

Communication contention in APN list scheduling algorithm

Task scheduling is an essential aspect of parallel process system. This NP-hard problem assumes fully connected homogeneous processors and ignores contention on the communication links. However, as arbitrary processor network (APN), communication contention has a strong influence on the execution time of a parallel application. This paper investigates the incorporation of contention awareness into task scheduling. The innovation is the idea of dynamically scheduling edges to links, for which we use the earliest finish communication time search algorithm based on shortest-path search method. The other novel idea proposed in this paper is scheduling priority based on recursive rank computation on heterogeneous arbitrary processor network. In the end, to reduce time complexity of algorithm, a parallel algorithm is proposed and speedup O(PPE) is achieved. The comparison study, based on both randomly generated graphs and the graphs of some real applications, shows that our scheduling algorithm significantly surpasses classic and static communication contention awareness algorithm, especially for high data transmission rate parallel application. Supported by the National Natural Science Foundation of China (Grant Nos. 90715029 and 60603053), the Cultivation Fund of the Key Scientific and Technical Innovation Project, Ministry of Edacation of China, and the Key Project of Science & Technology of Hunan Province (Grant No. 2006GK2006)     

基于GML的公共交通数据建模

文章分析了目前的交通信息系统的建模方法及其存在的问题,结合GML3.1、GML模式和线性参考方法,研究了使用GML对公共交通数据模型的几何和拓扑关系建模的方法。以城市公共交通模型为开发实例,给出了基于GML的郑州市公共交通的建模方案和具体实现方法,并使用XSLT技术将最终结果可视化。     

将Access数据库中图文信息导出到Word文档的方法

该文介绍了将Access数据库中的图文混编内容导出到Word文档的方法,并给出了用Visual Basic 6.0实现的程序实例。     

可配置流处理器核心级指令设计及相关编译技术研究

针对目前微处理器面对通用性、高性能、功耗效率的矛盾,我们提出了可配置流处理器的解决方案。本文重点研究了可配置流处理器中核心级指令设计及相关的编译技术,其核心设计思想是根据应用的计算特征设计流处理器中的核心级指令集,从而降低指令集硬件资源的需求。