运动员赛前心理状态的影响因素及调控方法

在查阅相关文献的基础上,结合问卷调查的方法,归纳出影响运动员比赛成绩的几种主要赛前心理因素,从主观与客观多角度分析并寻求原因,结合教学实践提出了相应的调控方法.     

基于串行通信的双Web服务器冗余系统设计与实现

设计实现了一个基于串行口通信的双Web服务器的冗余系统,详细介绍了基于串行通信口的实现方法,并对冗余系统的原理和实现过程进行了分析。     

论加强单位内部会计控制建设

本文针对目前一些单位内部会计控制的现状,从认识内部会计控制的意义入手,通过制定切实可行的内部会计控制制度并组织实施等几个方面阐述如何加强单位内部会计控制建设。     

The Role of Cancer Risk in the Regulation of Industrial Pollution

The extent of carcinogen regulation under existing U.S. environmental statutes is assessed by developing measures of the scope and stringency of regulation. While concern about cancer risk has played an important political role in obtaining support for pollution control programs, it has not provided the predominant rationale for most regulatory actions taken to date. Less than 20% of all standards established to limit concentrations of chemicals in various media address carcinogens. Restrictions on chemical use are more frequently based on concerns about noncancer human health or ecological effects. Of the chemicals in commercial use which have been identified as potential human carcinogens on the basis of rodent bioassays, only a small proportion are regulated. There is an inverse relationship between the scope of regulatory coverage and the stringency of regulatory requirements: the largest percentages of identified carcinogens are affected by the least stringent requirements, such as information disclosure. Standards based on de minimis cancer risk levels have been established for only 10% of identified carcinogens and are restricted to one medium: water. Complete bans on use have affected very few chemicals. The general role that carcinogenicity now plays in the regulatory process is not dramatically different from that of other adverse human health effects: if a substance is identified as a hazard, it may eventually be subject to economically achievable and technically feasible restrictions.     

论养老保险基金参与公司治理

通过对国有企业改制中公司治理方面出现的问题的分析 ,从养老保险基金参与对公司治理方面进行探讨 ,提出改进上市公司治理机制的现实政策选择 ,这有利于我国证券市场的发展和完善 ,有利于我国国有企业的改革     

欧元长期低迷的外在制约因素分析

现在美国的经济增长速度开始放缓 ,而欧盟的经济状况在经历两年的调整之后进入一个比较稳定的发展阶段。从理论上来讲欧元的汇率应该有一个坚挺的趋势 ,但事实却相反 ,欧元却一直走弱。本文通过欧盟和美国对欧元态度的对比 ,对这种现象做了一些分析。美国出于自身的利益考虑不希望欧元走强 ;而欧盟各国也都乐于看到欧元疲软 ;与此同时市场投资者也对欧元信心不足。这些态度其实成了解释欧元汇率的走势为什么屡屡出乎预测家的估计 ,一直保持相对弱势的关键原因     

新时期外来词的几种变化

随着改革开放和商品经济的大发展，近20年来外来词误的引进在方方面面都发生了很大的变化。这种变化主要体现在引进形式、内容、频率以及来源等四个方面。     

汉语外来词研究五十年

我国语言学界对汉语外来词进行自觉的研究始于二十世纪五十年代。本文从五个方面对半个世纪以来汉语外来词的研究状况进行了综述。     

试论企业的环境成本管理

近年来随着人们环保意识的增强,企业对环境成本的管理日趋重视。本文从环境成本的内涵入手,阐述了环境成本的管理指导思想,并提出了环境成本管理的方法。     

Sampling Strategies for Toxic Air Contaminants

Annual concentrations of toxic air contaminants are of primary concern from the perspective of chronic human exposure assessment and risk analysis. Despite recent advances in air quality monitoring technology, resource and technical constraints often impose limitations on the availability of a sufficient number of ambient concentration measurements for performing environmental risk analysis. Therefore, sample size limitations, representativeness of data, and uncertainties in the estimated annual mean concentration must be examined before performing quantitative risk analysis. In this paper, we discuss several factors that need to be considered in designing field-sampling programs for toxic air contaminants and in verifying compliance with environmental regulations. Specifically, we examine the behavior of SO2, TSP, and CO data as surrogates for toxic air contaminants and as examples of point source, area source, and line source-dominated pollutants, respectively, from the standpoint of sampling design. We demonstrate the use of bootstrap resampling method and normal theory in estimating the annual mean concentration and its 95% confidence bounds from limited sampling data, and illustrate the application of operating characteristic (OC) curves to determine optimum sample size and other sampling strategies. We also outline a statistical procedure, based on a one-sided t-test, that utilizes the sampled concentration data for evaluating whether a sampling site is compliance with relevant ambient guideline concentrations for toxic air contaminants.