催化分光光度法测定痕量铜(Ⅱ)

基于在水介质中Cu^2 对H2O2氧化甲基橙有催化作用，文章提出一种测定痕量铜的新方法。在此法中Cu^2 的浓度在0．02—1．25(μg／25m1)范围内与△A呈线性关系，测得反应表现活化能En=36．92kJ／mol。此法可用于自来水和试剂中铜的测定。     

污水样品中氨氮含量的测定与分析

在对污水样品中进行氨氮含量的测定实验中,可以用到多种实验方法,例如简易的电极测定法、灵敏的试剂比色法等,选用合适的测定设备,根据氨氮的化学和物理性质来进行含量测定,从而分析污水样品中氨与氮的比重,为污水的处理提供基本数据。     

测量不确定度评定及其在电学计量中的应用研究

本文主要对不确定度评定理论进行阐述介绍,对其在电学计量中的应用做分析研究。     

基于时间测定法的工时定额标准化研究

工时定额是企业生产经营需要的一项基础性数据,一套科学合理的工时定额对企业合理安排生产、公平按劳分配、缩短生产(维修)周期等都有着至关重要的作用。在规范工时测定程序的基础上,就如何利用时间测定法对工时定额进行标准化进行了研究,得到了一套从工时测定开始至获得标准工时的科学方法与程序,以及标准工时的量化公式。     

浅析GPS测量技术及其在工程测量中的应用

随着研究的深入以及科学技术的发展,GPS系统内所应用的先进技术呈现多元化。本文结合GPS测量技术的有关内容,浅析工程测量领域GPS测量技术的应用。     

浅谈电能表计量误差及计量损耗

本文介绍了电能表引起误差的现象,阐述了电能表计量系统的特点,分析了产生计量误差或计量损耗的原因,论述了电能表及电压回路改造,提出了减少电能表计量误差及计量损耗的措施。     

资源勘查中GPS系统的控制测量与工程测量应用

本文基于GPS系统及定位的原理论述了资源勘查中GPS系统在控制测量环节与工程测量环节的科学应用,利用GPS定位技术的高精密性、灵活观测性发挥了其在资源勘查工作中的重要测量作用,有效解决了GPS系统高程控制难、缺乏丰富经验、控制水平有限的核心问题。     

基于影像分析法的标准工时测定方法研究及应用

本文在传统标准时间测定方法的基础上,把影像分析由动作研究扩展到时间研究领域,提出了一套新的测定标准时间的方法——影像分析法。本文建立了该方法的操作流程,介绍了影像制作标准以及评比人员培训方法,规范了速度评比系数、工作状态评比系数、作业难度评比系数三个修正系数的确定标准,并列举了实例计算演示方法的应用过程。     

浅谈熟悉路基施工测量方法

随着近年来我国经济建设逐步走上健康发展的轨道,公路建设作为国民经济发展的基础保证,突飞猛进地向前发展。然而,在高等级公路施工中对于测量工作还存在着一些不合理的现象,给工程项目施工进度带来了影响及不必要的经济损失。本文首先分析了施工测量的工作程序,然后列出了一些路基施工测量方法,提出熟悉路基施工的测量方法是一项系统工程,只有不断积累经验,不断探索,才能有创新,有所进步。     

Social Change: Measurement and Theory*

Societal change, which takes a variety of directions and forms and in no way can be assimilated or reduced to a single dimension, is often accompanied by a perception of insufficient understanding and lack of control. There is a frustrated need for mastering complexity and instability, separating the voluntary from the involuntary, the intended from the unintended, opportunities from risks, getting to the real causes and dominating the uncertain implications of social change. Social change catches us unprepared and confused. In this context statistics are generally considered a fundamental instrument of knowledge, but also part of the problem! In the public debate and in the specialized literature, the ability to measure social phenomena through current statistics and indicators is increasingly questioned. Data-it is claimed-are lacking, particularly longitudinal data; their quality (accuracy, relevance, timeliness, comparability, etc.) should be improved; indicators do not provide early warning signals, policy performance evaluation, and a precise indication of outcomes. Statistics cannot be used as a reliable and timely basis for decision making by individuals, organizations, governments, and for understanding these decisions. In some cases, statistics have been accused of giving a misleading and false picture of reality: do we measure the real extent of social exclusion and unemployment? Do we fully capture the quality of life and the degradation of the environment? Mismeasurement has been deemed by some commentators as being responsible for the wrong focus in inflation and stabilization policies, science and technology, unemployment and poverty. The productivity paradox, the informal economy, failure to measure welfare and the quality of urban life are instances where statistics do not seem to provide complete and satisfactory answers to the demand for information and knowledge. Our paper illustrates how, quite independently of measurement techniques and data production processes, the inadequacy of the conceptual framework may explain mismeasurement in relation to complex (multidimensional) and dynamic social phenomena. It is then to social theories, explanations and interpretations that statisticians need to turn, in order to come to grips with the new challenges in social measurement. We will develop this thesis looking at a few cases where measurement issues can be connected to both theoretical and empirical difficulties. The statistical gap which reveals itself in the mismeasurement or difficult measurement of social phenomena is closely interconnected with the social science gap. Only close collaboration between statisticians and social scientists can bring about continuous advancement in social science and quality improvement in social statistics.     

逆向工程测量技术研究

数据的获取、测量是逆向工程中的第一个步骤,也是逆向工程测量最关键的技术之一。综合接触式工程测量技术和非接触式工程测量技术的实物数据获取方法,是目前众多逆向工程测量技术中针对大型的、结构复杂的测量对象最具有高效性的一种工程测量方式。     

风险测量VAR及其原理

用公式可表示为:Prob(△P>VAR}=1-a(其中Prob表示:资产价值损失小于可能损失上限的概率;△P表示:某一金融资产在一定持有期△t的价值失额;VAR表示:给定置信水平a下的在险价值,即可能的损失上限;a表示:给定的置信水平。)