On the improvement of one-sided S control charts

The most common charting procedure used for monitoring the variance of the distribution of a quality characteristic is the S control chart. As a Shewhart-type control chart, it is relatively insensitive in the quick detection of small and moderate shifts in process variance. The performance of the S chart can be improved by supplementing it with runs rules or by varying the sample size and the sampling interval. In this work, we introduce and study one-sided adaptive S control charts, supplemented or not with one powerful runs rule, for detecting increases or decreases in process variation. The properties of the proposed control schemes are obtained by using a Markov chain approach. Furthermore, a practical guidance for the choice of the most suitable control scheme is also provided.     

浅论位移电流

位移电流是普通物理中一个较重要的概念,也是教学中的一个难点.本文从位移电流概念的提出及实验验证,位移电流的物理意义及其与传导电流异同等几方面对其加以阐述,以求对位移电流的教学有所帮助.     

以民为本:着力解决事关群众切身利益的突出问题

党要始终代表最广大人民的根本利益 ,既是实践党的宗旨所需要 ,也是深入学习贯彻“三个代表”重要思想的根本要求。为此不仅党的理论、路线、纲领、方针、政策都必须把人民的根本利益作为出发点和归宿 ,更要在各项工作中坚持以民为本的思想 ,着力解决事关广大人民群众切身利益的突出问题 ,要抓准、抓实在和切实抓出成效     

试论"三个代表"与"人民代表"

"三个代表"是我们党的立党之本、执政之基、力量之源,也是新时期人大工作的指导思想."人民代表"(通称人大代表)是我国根本政治制度的基石和组成细胞,是实现"人民当家作主"和体现"一切权力属于人民"的社会主义民主的重要途径.在人大工作中,特别是在人民代表大会的代表制度建设中,落实"三个代表"的要求,是新时期所面临的新要求、新任务和新挑战.     

理想气体微观状态数的计算及其统计性质的研究

本文借助自由粒子的量子能态分布理论,利用3n维空间球体模型,实现了对理想气体（N,V,E）系统微态数的计算,在此基础上,给出了理想气体热力学量的统计结果。     

价值在宏观上的分配

价值向生产价格的转型是按宏观上的一个分配规律———平均化规律进行的。生产任何商品所创造的价值均要交给社会 ,由社会按平均法则在各部门间分配 ,分配后各商品得到的价值才能形成其价格。由于平均分配的过程是个动态的过程 ,故而传统的静态分析法在此失效。     

"三个代表"--党的建设的新里程碑

阐述了"三个代表"重要思想的科学内涵,以及它所高度概括的党的先进性,阐明"三个代表"的重要思想是新时期党建工作的新的里程碑.     

Asymptotic Distributions of Unit-Root Tests When the Process Is Nearly Stationary

Several test criteria are available for testing the hypothesis that the autoregressive polynomial of an autoregressive moving average process has a single unit root. Schwert (1989), using a Monte Carlo study, investigated the performance of some of the available test criteria. He concluded that the actual levels of the test criteria considered in his study are far from the specified levels when the moving average polynomial also has a root close to 1. This article studies the asymptotic null distribution of the test statistics for testing p = 1 in the model Y_t = pY _t-1 + e _t – 0e _t-1 as 0 approaches 1. It is shown that the test statistics differ from one another in their asymptotic properties depending on the rate at which 0 converges to 1.     

Estimation and Prediction of Functional Autoregressive Processes

We present a generalization of some previous works (Bosq, Mourid, Pumo) about the functional forecast of a Banach autoregressive processes. We are mainly concerned with order p , p >1, autoregressive processes which appear to be a natural extension of the well-known R d -valued autoregressive processes to a functional framework. This modelization provides an new approach for estimating and for predicting a continuous time stochastic process over an entire time interval. Using results from [12] we prove asymptotic properties of estimators of the parameters and predictors which are based upon a principal component decomposition of a Hilbert-Schmidt operator with unknown eigenvectors.