测定氨基磺酸的标准方法的探讨

为解决环已基氨基磺酸钠的主要原料──高纯度氨基磺酸（NH2SO3H）含量测定的准确性，对几种氨基磺酸含量和硫酸盐（SO4）含量的测试方法进行了实验对比和理论探讨，证实了高纯度氨基磺酸含量的测试应采用HG／T2527－93规定的亚硝酸钠滴定法，并推荐采用总酸量法为硫酸盐（SO4）含量的测试方法。     

RTL集成电路的时序深度

在高层次测试生成中，为了更好地利用高层次电路的结构信息，以Verilog硬件描述语言描述的电路为研究对象，提出寄存器传输级（RTL）集成电路的静态时离深度和动态时序深度概念，从静态，动态两方面出发度量语句的执行效果和程序运行的时离关系，并结合实例分析了二者在高层次测试生成中的应用，高层次行为信息的提取也将为高层次设计和验证提供方便。     

一种新的低空间分辨力阵列触觉图象的处理方法

本文根据低空间分辨力阵列触觉图象的特点，分析了噪声来源、形式和分布，提出了一种新的基于平滑的噪声消除方法。讨论了在图象基本顶点的基础上，运用了顶点分裂和合并技术找出相应的图形顶点，并通过最小二乘法复原出离散图象的连续轮廓，从而为提高触觉图象辨识率奠定了基础．     

浅谈大学公共英语课堂情境教学

在大学英语教学中，教师应该努力创设一个良好的教学环境，不断地开展各种各样的课堂活动来创造自由交际的气氛，从而激发学生兴趣，启发学生动口，提高教学效果。具体的教学技巧与方法有：创设情境、巧设问题，紧扣专业特色、表演示范、变化讲授、整体教学等。     

Statistical tests on two characteristics of the shapes of cluster diagrams

A cluster diagram is a rooted planar tree that depicts the hierarchical agglomeration of objects into groups of increasing size. On the null hypothesis that at each stage of the clustering procedure all possible joins are equally probable, we derive the probability distributions for two properties of these diagrams: (1)S, the number of single objects previously ungrouped that are joined in the final stages of clustering, and (2)m _k, the number of groups ofk+1 objects that are formed during the process. Ecological applications of statistical tests for these properties are described and illustrated with data from weed communities of Saskatchewan fields.This work was supported by the Natural Sciences and Engineering Research Council of Canada.     

微机数据发生器与逻辑分析仪构成的现代数字测试系统

本文着重结合我们在数字测试领域中取得的成果,从技术和经济性两个方面来探讨现代数字系统的测试,并给出了通用、经济和方便的测试系统方案。     

应用聚类分析方法,研究学生类型

根据首都师范大学数学系１９９４级４３名学生在１９９４～１９９５学年度１０门学科考试分数，采用聚类分析方法，对学生进行分类，以此为教育评价与因材施教提供依据．     

To combine or not to combine? issues of combining forecasts

This paper addresses issues such as: Does it always pay to combine individual forecasts of a variable? Should one combine an unbiased forecast with one that is heavily biased? Should one use optimal weights as suggested by Bates and Granger over twenty years ago? A simple model which accounts for the main features of individual forecasts is put forward. Bayesian analysis of the model using noninformative and informative prior probability densities is provided which extends and generalizes results obtained by Winkler (1981) and compared with non-Bayesian methods of combining forecasts relying explicitly on a statistical model for the individual forecasts. It is shown that in some instances it is sensible to use a simple average of individual forecasts instead of using Bates and Granger type weights. Finally, model uncertainty is considered and the issue of combining different models for individual forecasts is addressed.     

Developing the methodology of TSI: From the oblique use of methods to creative design

During the last 13 years, a dialogue has been conducted in the Critical Systems literature on the subject of choice betwen methods. However, in the late 1980s and early 1990s, researchers went in two separate directions. One direction involved an exploration of the “creative design of methods.” This is when the problem situation is understood in terms of a series of systemically interrelated research questions, each of which might need to be addressed using a different method, or part of a method. A synthesis is generated that allows each individual research question to be addressed as part of a whole system of questions. The other research direction involved the development of “Total Systems Intervention” (TSI), a meta-methodology that, amongst other things, encourages the creative exploration of the problem situation prior to the choice of methods. One of the latest innovations in TSI is a theory of the “oblique” use of methods. This is the use of methods for purposes other than those they were originally designed for. However, it is argued here that all the case studies that have been subject to an “oblique” interpretation can be better explained if they are seen as examples of the creative design of methods. We can therefore bring together the two strands of research that have hitherto been pursued separately in the Critical Systems literature. it is suggested that TSI can be enhanced by an understanding of the creative design of methods because the latter allows us to explain the purposive, flexible, and responsive way in which TSI is most successfully used in practice.     

对长短足运动员在跑中支撑时期的比较分析

本文采用比较法,分析了长短足运动员在跑中支撑时期的特点.根据其特点,制定了长短足运动员的测重训练方法.