An intellectual DSM system for the diagnosis of illnesses in the vision organ

The introduction of a new subject field (the diagnostics of illnesses in the vision organ) is being considered for the intellectual DSM system. The results of computer experiments on the diagnostics of degenerative myopic retinoschisis and X-chromosomal retinoschisis are presented in the paper.     

Informational basis of the functional diagnostics of dynamic systems

The informational basis of the functional diagnostics of linear dynamic systems is presented. For this purpose three laws of operation of such systems are formulated. These arc laws of entropy or entropy production minimization by a system in case of failure. The laws have been obtained by defining the operation redundancy and the equations about that redundancy or its production. Methods for functional diagnostics of linear dynamic systems, covering all possible types of operation redundancy, are considered. The methods for functional diagnostics of linear dynamic systems are classified by means of the operation redundancy.     

A SAS/IML software program for GEE and regression diagnostics

A SAS/IML software program is described that computes regression diagnostics for generalized estimating equations. These diagnostics are computationally efficient and accurate approximations for the effect of deleting one observation or one cluster on individual regression coefficients (DFBETA) or on the overall fit of the model (Cook's Distance). New formulae for the diagnostics are presented which are equivalent to those introduced by Preisser and Qaqish [1996. Deletion diagnostics for generalised estimating equations. Biometrika 83, 551-562]. The new formulae expose the relationships of the diagnostic measures to the GEE score equations and to a bias-corrected GEE variance estimator which is also implemented in the SAS macro. The macro is applied to three clustered data sets.     

Evolutionary approach to the functional diagnostics of dynamic systems: Part 2

In Part 1, an evolutionary approach to the functional diagnostics of dynamic systems has been proposed and a method for functional diagnostics has been constructed on the basis of the object energy in case of failure. Another method of functional diagnostics of dynamic systems is developed in Part 2 as a corollary from the evolutionary approach to functional diagnostics. Under this method the evolution is regarded as a change in the system structure. The method is based on the definition of a quadratic form of the object in case of failure. Under this method the failure is presented as a bilinear dynamic system, the terms “quadratic form” and “redundancy” are introduced and the problems of functional diagnostics of dynamic systems are formally stated for this failure model. The definitions given for observability, controllability and stability of the failure, as well as the definition for observer of failure, are essential for the construction of this method.     

基于定性和半定性方法的故障检测与诊断技术

首先介绍了基于定性和半定性方法的故障检测与诊断技术的产生背景和发展状况, 然后分基于定性方法和基于半定性方法. ———两大类介绍了主要的故障检测和诊断技术, 讨论了各种方法的优缺点, 介绍了一些典型的应用实例, 并对发展的趋向进行了探讨.     

Diagnostics analysis for log-Birnbaum-Saunders regression models

In this paper, several diagnostics measures are proposed based on case-deletion model for log-Birnbaum-Saunders regression models (LBSRM), which might be a necessary supplement of the recent work presented by Galea et al. [2004. Influence diagnostics in log-Birnbaum-Saunders regression models. J. Appl. Statist. 31, 1049-1064] who studied the influence diagnostics for LBSRM mainly based on the local influence analysis. It is shown that the case-deletion model is equivalent to the mean-shift outlier model in LBSRM and an outlier test is presented based on mean-shift outlier model. Furthermore, we investigate a test of homogeneity for shape parameter in LBSRM, which is a problem mentioned by both Rieck and Nedelman [1991. A log-linear model for the Birnbaum-Saunders distribution. Technometrics 33, 51-60] and Galea et al. [2004. Influence diagnostics in log-Birnbaum-Saunders regression models. J. Appl. Statist. 31, 1049-1064]. We obtain the likelihood ratio and score statistics for such test. Finally, a numerical example is given to illustrate our methodology and the properties of likelihood ratio and score statistics are investigated through Monte Carlo simulations.     

Langmuir探针扫描电源的设计

Langmuir探针诊断技术是一项被广泛应用的等离子体参数测试技术。文中介绍了一种使用软件控制的扫描电源的设计,详细阐述了系统硬件和软件的设计,它可以实现对等离子体特性参数快速简便的测量。     

Calculation of photoemission spectra for surfaces of solids

Applications to plasma diagnostics, physical electronics, nuclear physics, star cluster problem and super-resolution processing improvements in optical imaginary are presented. The computer program implementation of inverse problems are discussed as well.     

Local influence in estimating equations

Local influence diagnostics based on estimating equations as the role of a gradient vector derived from any fit function are developed for repeated measures regression analysis. Our proposal generalizes tools used in other studies ( [Cook, 1986] and [Cadigan and Farrell, 2002]), considering herein local influence diagnostics for a statistical model where estimation involves an estimating equation in which all observations are not necessarily independent of each other. Moreover, the measures of local influence are illustrated with some simulated data sets to assess influential observations. Applications using real data are presented.     

PROFIBUS技术在油库监控系统中的应用

主要对PROHBUS现场总线和AS-i总线的特点和长处进行了介绍,以及它们在工业企业网中所处的不同位置和所起的不同作用,将这些先进技术应用于油库工程建立了油库监控系统,使得通信、控制更趋流畅、有效;使得对现场安全情况的监视更加可靠;并且还分析指出了用作主站的西门子PLC的重要性,强调了在网络架构中使用光纤电缆的必要性,提出了基于PROFIBUS技术的油库监控系统设计方法,该系统已经成功应用于油库.     

基于模型的控制系统故障诊断技术的最新进展

评述了近三年来基于模型的控制系统故障诊断技术的发展状况.介绍了这一技术在九个 方面的最新进展及十一项最新的应用.对故障诊断技术目前的状况进行了分析和总结,给出 了这一领域中值得进一步研究的一些问题和可能的发展方向.     

故障检测与诊断技术

本文介绍了故障检测与诊断技术的历史及发展状况,对其所用的各种方法分类进行了详细评述,指出了当前急待解决的若干前沿课题,并对这门技术的发展进行了展望。     

设备工程监理中进度控制的偏差分析法研究

为了使设备工程监理中的进度控制方法更加完全,提出了偏差分析法。它包括曲线比较法与投资偏差分析法两种进度控制方法,其中曲线比较法分为S形曲线比较法、香蕉曲线比较法和前锋线比较法。利用这两种进度控制方法,均能直接判断进度状况,并计算出相应的进度偏差值。在某污水处理站的实际应用表明,该方法在进度控制方面取得了很好的效果,完善了设备工程监理的进度控制方法体系。     

LonWorks电力线SCADA系统

ＬＯＮＷＯＲＫＳ是一种能用于监视传感器,控制激励器和显示系统状态的通用控制系统。它已被广泛地用于各个领域中,其中的一种就用是制造过程和机器诊断,故障与安全报警中ｏｎｗｏｒｋｓ监视系统和数据采集（ＳＣＡＤＡ）系统的建立。借助于ＬｏｎＷｏｒｋｓ电力线传输器,ＳＣＡＤＡ的信号可以通过供给被控设备电源的相同的电源线来传输,电力线信号传输不需要附加通讯电缆,大大降低了费用与简化了重新修整原有安装的任务。Ｌｏ     

社会经济系统数学模型中推断变结构问题的Bayes预测方法

本文利用统计诊断的思想,从Bayes预测观点对社会经济系统数学模型中的结构变化问题进行推断,给出了基于条件预测统计量和Kullback-Lebler距离的两种新方法,这些方法均为直接从原始数据出发估计转变点,而不象其它方法那样需在事先选择变结构模型的具体形式,因此计算简便,应用广泛,此外,本文着重研究了我国人均钢材消费与人均国民生产总值之间的关系,获得比较理想的结果。     

基于行为学的网络行为监控系统

通过对网络黑客攻击方式和手段以及用户网络行为特征的分析,提出用户违反网络安全规则行为的分类原则.根据行为科学原理,基于数理统计思想的用户网络行为模型,按照网络安全实时监控的要求,提出了网络行为监控系统的设计方案,最后指出模型的下一步改进工作和监控系统需要完善的内容.     

粮情检测分析控制系统及应用

提出了一种粮情分析控制系统及其应用。介绍了系统的工作流程、硬件构成和软件设计。实际运行表明,系统具有传输距离远、测量准确度高、运行可靠、智能化程度高等特点。     

基于最近邻原则的半监督聚类算法

基于最近邻原则的半监督聚类算法是以基于最近邻的聚类中心求解算法为基础的。在基于最近邻的聚类中心求解算法中,用相似度矩阵记录数据点间的相似程度,由目标函数最小值求得聚类的类中心点。在基于最近邻原则的半监督聚类算法中,根据约束信息来调整相似度矩阵G,数据点间相似度的变化引起了数据点间加权欧式距离的变化,由此更新加权欧式距离矩阵M,最后执行聚类中心求解算法完成聚类。大量实验结果表明,该算法能获得较好的聚类结果。