评价体验英语综合教程第一册(英文)

通过衡量体验英语综合教程第一册,得出教师对于教科书必须持客观态度,并通过教师自己的修改和补充,来更好的利用它。     

基于综合评价指标的火电厂风机选型方法研究

本文通过分析风机运行特性,建立了风机选型新模型。通过全寿命周期成本表示其经济性,ADC效能评估法表示其技术性。     

论使用净价进行业绩考核之不合理性

净价虽然能够反映出债券市场收益率的变动和行情的变化,但是却不是一个精确的指标,在实践运用中往往会出现误差。特别是在收益率变动幅度较小的情况下,还会产生严重的方向性错误。因此,建立一个合理有效的债券投资考核体系,除了要继续研究如何推出更有指标意义的债券指数之外,深化金融机构的体制改革,建立内部全面的考核体系,也是必不可少的一环。     

电网企业编制公司发展规划的几个关键问题

讨论了公司发展规划的工作过程,提出了双闭环优化的思路,分析了规划工作内容间及其与相关工作的逻辑关系,并且就规划目标的编制方法和规划方案的经济评价方法进行了讨论。     

Progression in Technology Education in New Zealand: Components of Practice as a Way Forward

Understanding and undertaking technological practice is fundamental to student learning in technology education in New Zealand, and the enhancement of student technological literacy. The implementation of technology into New Zealand’s core curriculum has reached the stage where it has become critical that learning programmes are based on student progression to allow for a seamless education in technology from early primary to senior secondary. For this to occur, teachers and students need to focus learning on key features of technology education. This paper is based on research initiated in 2001 which explored the nature of progression of student learning in technology. It draws on findings from research undertaken in New Zealand classrooms in 1999–2000 that resulted in the development of the technology assessment framework (TAF), (as reported in detail Compton & Harwood 2003). The 1999–2001 research was funded by the New Zealand Ministry of Education. Findings from the 2001 research allowed for the identification of key features of technology education that are relevant across all age groups, contexts and technological areas. These key features were collectively termed components of practice. The three components of practice established to date are brief development, planning for practice, and outcome development and evaluation. This paper discusses the development of progression matrices for each of these and provides illustrative examples of student work levelled against the matrix indicators of progression for brief development.     

Management's Materiality Criteria of Internal Control Weaknesses and Corporate Fraud: Evidence from China

This paper investigates the determinants and consequence of Chinese listed companies' first-time decisions on materiality criteria for internal control weaknesses, which have been observable beginning from the 2011 annual report. Although pretax income is most commonly used as the benchmark for materiality, revenue is also used as a popular alternative. Revenue is more susceptible to manipulation, as it has a much larger financial amount than pretax income. We argue that unethical managers prefer not to disclose material weaknesses by manipulating the materiality criteria to justify non-disclosure of a potentially material weakness. Consistent with this opportunistic incentive, we find that when companies committed fraud in the previous year that remains undetected, their management is more likely to use revenue (rather than pretax income) as the first-time benchmark and to set a higher revenue-based materiality threshold as well. Moreover, once the materiality metrics are set, the first-time revenue-based materiality threshold is significantly and positively associated with subsequent incidence of corporate fraud, which suggests that setting deviant and loose materiality metrics leaves room for the management to engage in future misconduct.     

基于层次分析法的信息系统安全评价研究

利用层次分析法(AHP)的原理与方法,提出了信息系统安全评价指标体系,建立综合分析评价模型,采用向量范数法对判断矩阵进行优化。描述了信息系统安全评价的方法和流程,计算出评价指标的综合权重。通过实例说明这一模型能对信息系统安全等级进行综合评价。     

基于灰色关联分析的施工方案优选研究

施工方案的选择不仅直接影响项目利润的大小,更会关系到项目的成功与失败。本文在充分考虑施工方案影响因素的基础上,选择施工方案评价指标,利用层次分析法确定各评价指标的权重。建立灰色关联分析模型,构造理想方案。在分析各拟选施工方案与理想方案关联度的基础上确定最优方案,并结合实例进行了阐述。     

An empirical study of research and development top managers' perceptions of short-term pressures from capital markets in the United Kingdom

It is often argued that capital market pressures are increasingly directed towards short-term performance evaluation of managers and their operations. Whether these external capital market pressures actually exist or not, short-term pressures on firms are influenced by managers' own perceptions of these external pressures. If managers perceive the existence of these external pressures it is likely that this will lead to short-term behaviour on their part. The purpose of this paper is therefore to examine (a) research and development (R&D) managers' perceptions of short-term behaviour in capital markets in the UK, and (b) patterns of behaviour relating to R&D which may be influenced by these perceptions. The findings of this study indicate that approximately half of the UK research and development managers perceive capital markets as responsible for putting inappropriate short-term pressures on their companies' management. However, an even larger proportion report short-termist behaviour relating to R&D and its evaluation, suggesting that some at least of the problem of ‘short-termism’ is internally generated.     

Consistency and asymptotic normality of maximum likelyhood estimators

Abstract

Let the random variable X denote the time taken in completion of a process. For a fixed a, if the observed value of X is less than a, the X is observable, but if X is greater than a, the process is tampered with and is accelerated or decelerated at time a by some unknown factor α, and Y=a+α(X-a) is observed. If the experimenter has only partial control over the experiment, it may be difficult to get several observations on Y corresponding to the same a value. Thus we have a set of independent but not identically distributed observations. The large sample behavior of m.l.e. of the unknown parameters based on tampered random variables Y ^b1 , ..., Y ^bn is studied. If X follows an exponential distribution with mean (1/--), ... the consistency and asymptotic normality of the m.l.e. of α and -- is established under mild conditions on a ^b1, a ^b2, ... The conditions needed for establishing the consistency of m.l.e. of lX are given when X follows a uniform distribution U(O, --) or when X has any known distributional form