高电压设备绝缘在线监测数据采集的研究

提出了数据采集的系统方案，对数据采集器的计算机接口和模数转换电路进行了分析，通过采用高速光电隔离方法，有效抑制了计算机系统对模拟信号的干扰．简要给出了编程步骤．     

Spectral analysis of phylogenetic data

The spectral analysis of sequence and distance data is a new approach to phylogenetic analysis. For two-state character sequences, the character values at a given site split the set of taxa into two subsets, a bipartition of the taxa set. The vector which counts the relative numbers of each of these bipartitions over all sites is called a sequence spectrum. Applying a transformation called a Hadamard conjugation, the sequence spectrum is transformed to the conjugate spectrum. This conjugation corrects for unobserved changes in the data, independently from the choice of phylogenetic tree. For any given phylogenetic tree with edge weights (probabilities of state change), we define a corresponding tree spectrum. The selection of a weighted phylogenetic tree from the given sequence data is made by matching the conjugate spectrum with a tree spectrum. We develop an optimality selection procedure using a least squares best fit, to find the phylogenetic tree whose tree spectrum most closely matches the conjugate spectrum. An inferred sequence spectrum can be derived from the selected tree spectrum using the inverse Hadamard conjugation to allow a comparison with the original sequence spectrum. A possible adaptation for the analysis of four-state character sequences with unequal frequencies is considered. A corresponding spectral analysis for distance data is also introduced. These analyses are illustrated with biological examples for both distance and sequence data. Spectral analysis using the Fast Hadamard transform allows optimal trees to be found for at least 20 taxa and perhaps for up to 30 taxa. The development presented here is self contained, although some mathematical proofs available elsewhere have been omitted. The analysis of sequence data is based on methods reported earlier, but the terminology and the application to distance data are new.     

空燃比控制中的数据采集和处理

在汽油机空燃比控制中，需要监视汽油机动力性变化。本文介绍了汽油机动力信号的采集系统和数据处理，并经实验证实。     

矩形域上散乱数据样条光顺法

本文提出了一种矩形域上散乱数据样条光顺法,此方法着重从计算观点出发,构造了极其稳定的快速算法,并给出了一些数值例子,数值结果表明此方法能精确地再现原有函数。     

框架—抗震墙高层建筑抗震墙的计算机辅助设计

本文成功地研制了地震作用下框架-抗震墙结构中抗震墙的计算机辅助设计系统SWCAD.并指出,优化设计思想是结构CAD系铣中不可分割的组成部分,本文提出一个新的概念:制图模式及模式填表.这一概念的提出,为解决长期以来困扰着CAD科研界的计算机制图方法统一化问题提供了一种可能性,为CAD系统中图形数据库的建立和程序的结构化指明了方向.     

动态数据的决策作用

本文阐述企业管理中,各数据在流动中的相互影响与相互制约的关系,并示例分析具有反馈干预的动态数据在系统约束条件下的决策性.     

基于VRGS的交通流微观仿真软件的开发

基于ＶＲＧＳ的交通流微观仿真软件对交通网络引入ＶＲＧＳ后的交通流进行仿真。本文阐述仿真模型的设计思想,介绍模型的框架结构,说明采用ＶｉｓｕａｌＢａｓｉｃｆｏｒＷｉｎｄｏｗｓ的程序实现方法。     

Automatic Defect Detection in X-Ray Images Using Image Data Fusion

Introduction A welded structure must be inspected to guarantee that the weld quality meets the design requirements to as- sure safety and reliability. However, X-ray image analyses and defect recognition are very complex. Most difficulties lie in finding …     

采用非线性预处理的多通路回波消除算法

非线性预处理是解决多通路回波消除中因输入信号间的强相关性而引起的滤波器不收敛的有效方法．如何确定预处理中的非线性变换系数，以达到既保证语音质量，又去除输入信号间的相关性的目的，是十分值得关注的问题．文中提出了一种应用模糊逻辑来调整非线性变换系数（α）的方法，使得α能随输入信号间的相关性而合理变化，该方法以较小的计算增量为代价，能最大程度地保证通话质量并加快滤波器的收敛速度．仿真结果表明了该方法的可行性和优越性．     

七号信令集中监测系统的数据管理系统

七号信令网是电信网的重要组成部分,其运行质量直接影响到电信网及其各种业务的运行稳定性和实际效益。在集中监测系统框架的基础上,提出了在系统中建立多个数据库和数据仓库相结合的方案进行数据管理,并对数据管理系统的组成结构、逻辑结构、数据存储与应用做了进一步的研究。