A survey of low-cost,user-friendly sqc software for microcomputers

Major factors to consider in selecting a microcomputer SQC package are discussed, and a selection of low-cost user-friendly software is described. Functions of each package are considered in the context of their purchase cost and arrangements for reproduction. Focus is on the classroom, but this software is also suitable for use in industry and commerce.     

积件理论的教学应用研究

积件理论是产生在中国本土的教学理论,和课件相比具有灵活开放的特点。通过比较积件与课件的不同分析了积件系统的特点,并结合工程图学的教学实践,说明如何应用积件思想设计积件系统,主要阐述应用积件系统突出工程图学的特点并完善教学的思想。最后给出在工程图学教学中积件系统的发展现状和方向。     

普通文字学的文字分类对象和分类方法

文字分类包括两项基本的工作:其一是确定分类对象;其二是确定分类方法。从文字孕育、产生、发展的历史角度上看,直到产生了字符的时候才有了真正的文字,字符即文字。文字既包括仍然明显表现着象形造字原理的文字,也包括不再显示象形造字原理的字母字,它们共同构成了普通文字学中文字分类的对象。普通文字学的文字分类是共时性的,是根据文字系统基本书写单位与语言单位的对应关系对各种文字系统的结构分类。文字分类的依据是字符的作用。     

An Exercise in Analysis of Variance Theory

The use of interactive computer graphics by teachers of statistics is encouraged, both before class to prepare plots to be used as examples and “live” in a graphics-terminal-equipped classroom. Twenty-four examples of computer-generated plots used to teach the concepts and techniques of statistics are shown.     

A Computer Program for Evaluating and Comparing Experimental Designs and Some Applications

For the past decade low cost computer graphics terminals have consisted almost exclusively of direct view storage tube (DVST) devices. Recently, however, a new variety of terminal based on “raster TV technology” has emerged which is competitive with storage tubes in price and readily supports variable intensity and color.

We summarize the basic organization of raster terminals so as to indicate their capabilities, discuss their advantages and disadvantages, and illustrate some of their uses in statistics and elsewhere. Because color is almost universally available on these terminals, we also discuss some elementary principles of color perception and use. An understanding of this material will help the data analyst present data effectively.     

Dynamic Graphical Tools for Teaching Experimental Design and Analysis Concepts

In 1996, computer-based modules were presented that use interactive graphics and simulation to teach basic statistical concepts for undergraduate courses. This article extends that work to develop new modules that can be used to demonstrate important statistical concepts underlying the design and analysis of experiments. Details of their implementation, content and usage are discussed.     

Hypothesis Testing and Confidence Regions for the Mean Sojourn Time of an M/M/1 Queueing System

This article discusses testing hypotheses and confidence regions with correct levels for the mean sojourn time of an M/M/1 queueing system. The uniformly most powerful unbiased tests for three usual hypothesis testing problems are obtained and the corresponding p values are provided. Based on the duality between hypothesis tests and confidence sets, the uniformly most accurate confidence bounds are derived. A confidence interval with correct level is proposed.     

图形设计教学新路径之探索

图形设计课是艺术设计专业的基础课，科学技术的不断发展使图形设计的概念发生了变化，图形设计课教学亦应做出相应的调整与改革。从观察、思维、构成三个不同的角度进行图形设计可作为教学改革的新路径，学生有效的实践练习也论证了其可行性。     

“工程制图”课程网络教学初探

在“工程制图”课程体系的改革研究中，一个重要的问题是如何将网络资源同“工程制图”教学有机地结合起来。本文就传统教学与网络教学进行比较，分析了“工程制图”课程采用网络教学的必要性，探讨了网络教学的优势。     

Accurate inference for scale and location families

A great deal of inference in statistics is based on making the approximation that a statistic is normally distributed. The error in doing so is generally O(n^?1/2), where n is the sample size and can be considered when the distribution of the statistic is heavily biased or skewed. This note shows how one may reduce the error to O(n^?(j+1)/2), where j is a given integer. The case considered is when the statistic is the mean of the sample values of a continuous distribution with a scale or location change after the sample has undergone an initial transformation, which may depend on an unknown parameter. The transformation corresponding to Fisher's score function yields an asymptotically efficient procedure.