声源作圆周运动时的多普勒效应

利用自制装置演示了声源作圆周运动的多普勒效应，并应用图谱分析软件得到频率分布图。     

软岩巷道开巷初期围岩变形灰色模型预测的研究

应用灰色系统理论对软岩巷道开巷初期围岩变形进行了预测，通过实例说明用GM（1，1）模型和双向差分模型预测巷道的围岩变形都是简单可行的。对GM（1，1）模型进行了改进，建立了具有较小原点误差的改进的GM（1，1）的模型，并且给出了双向差分模型，GM（1，1）模型与其改进模型对软巷道围岩变形预测结果的比较，为灰色系统理论用于软岩巷道开巷初始围岩及支扩变形预测的实践进行了新的探讨，它将在软岩工程未来行为的预测方面起着重要的参考作用。     

Comparative Thermodynamic Analysis of the Bi-Ga0.1Sb0.9 Section in the Bi-Ga-Sb System

Results of the comparative thermodynamic analysis of the Bi-Ga_0.1Sb_0.9 section in theBi-Ga-Sb system are given in this paper. Experimental calorimetric investigations were done according to Oelsen's method, while for the thermodynamic prediction Chou's general solution model was applied. Activities, activity coefficients, partial molar quantities for bismuth and integral molar quantities were obtained at a temperature of 1073 K. Based on obtained cooling curves, DTA and SEM results for the investigated samples, phase diagram of the investigated section is constructed and presented in this paper, too. This revised version was published online in July 2006 with corrections to the Cover Date.     

固定时间域可变采样间隔的统计控制图

本文从提高统计控制图对过程波动检测能力和方便管理的角度出发 ,对可变采样间隔(VSI)控制图进行改进 ,提出了针对连续过程质量控制应用需要的固定时间域可变采样间隔(VSIFT)控制图。文章详细介绍了VSIFT均值极差控制图、VSIFTEWMA控制图的设计 ,并分别评价了它们对过程异常状态的检测能力     

Monitoring change point for diffusion parameter based on discretely observed sample from stochastic differential equation models

Stochastic differential equation (SDE) models are useful in describing complex dynamical systems in science and engineering. In this study, we consider a monitoring procedure for an early detection of dispersion parameter change in SDE models. The proposed scheme provides a useful diagnostic analysis for phase I retrospective study and develops a flexible and effective control chart for phase II prospective monitoring. A standardized control chart is constructed, and a bootstrap method is used to estimate the mean and variance of the monitoring statistic. The control limit is obtained as an upper percentile of the maximum value of a standard Wiener process. The proposed procedure appears to have a manageable computational complexity for online implementation and also to be effective in detecting changes. We also investigate the performance of the exponentially weighted mean squared control charts for the continuous SDE processes. A simulation method is used to study the empirical sizes and the average run length characteristics of the proposed scheme, which also demonstrates the effectiveness of our method. Finally, we provide an empirical example for illustration. Copyright © 2014 John Wiley & Sons, Ltd.     

Simulation of correlated Poisson variables

Generating correlated Poisson random variables is fundamental in many applications in the management and engineering fields, and in many others where multivariate count data arise. Multivariate Poisson data are often approximately simulated by either independent univariate Poisson or multivariate Normal data, whose implementation is provided by the most common statistical software packages such as R . However, such simulated data are often not satisfactory. Alternatively, methods for simulating multivariate Poisson data can be used, but they are adversely affected by limitations ranging from computational complexity to restrictions on the correlation matrix, which dramatically reduce their practical applicability. In this work, we propose a new method that is highly accurate and computationally efficient and can be usefully employed even by non‐expert users in generating correlated Poisson data (and, more generally, any discrete variable), with assigned marginal distributions and correlation matrix. Copyright © 2014 John Wiley & Sons, Ltd.     

Calorimetric Investigations of the System Pb-Bi-Mg-Sb with Oelsen's Method. Part 2. Comparison of experimentally obtained values for lead activity with results of thermodynamic predicting

Results of the comparative thermodynamic analysis of the Pb-Bi_xMg_ySb_z section (x:y:z=8:1:1, in mole ratio) in the Pb-Bi-Mg-Sb system, obtained experimentally by Oelsen calorimetry and predicted by general solution model in the temperature range 600–1100 K, are given in this paper. This revised version was published online in July 2006 with corrections to the Cover Date.     

自相关过程的质量控制图

常规控制图应用的基本假设是从过程得到的测量值彼此独立,但许多连续型的制造业生产过程(例如化学和制药)往往存在自相关,此时常规控制图容易虚发警报。基于数据的样本自相关函数,本文改进了常规控制图的控制界限,使之适用于自相关过程,并运用常规X-s控制图和本文修正的X控制图对一个实际案例进行了比较分析,结果表明本文修正的X控制图可正确地判断过程是否处于受控状态。     

SAS软件在质量管理中的应用

本文介绍了质量控制的常用方法及其在ＳＡＳ软件中的实现     

利用统计分析提高经济效益

本文通过直方图分析和一元线性回归分析的两个应用实例，介绍如何利用统计分析提高经济效益。