A survey of scheduling problems with late work criteria

The paper presents the first complete survey of scheduling problems with the late work criteria. Late work objective functions estimate the quality of a schedule based on durations of late parts of jobs, not taking into account the amount of delay for fully late jobs. The paper provides a formal definition of the late work parameter and compares the criteria based on it with other classical performance measures. It shows the relationship between the late work model and the imprecise computation model known from the hard real-time literature. Moreover, the paper presents a few real world applications of the late work objective function. The paper lists results obtained for nearly forty problems of scheduling jobs on a single machine, parallel (identical and uniform) machines and dedicated machines, investigated in the literature since 1984.     

一种简单多功能单片机系统设计

本文介绍一种电路简单，具有多功能的实用单片机系统．     

现代诗歌史上单义诗歌的阐释与评价——以徐志摩的诗歌为例

作为与＂复义＂诗歌相对的＂单义＂诗歌,其诗美主要在形式。因为正是其显在的外在形式建构了一个潜在看不见的＂文学场＂,使其美得以表现,并获得永久性保存。因此,鉴赏与评论现代诗歌史上的＂单义＂诗歌,必须转换批评者的思维方式,摒弃传统侧重主题思想内容层面的意识形态式的社会学批评模式,从诗歌形式入手,才会做出与诗歌自身属性相应的鉴赏、阐释与评价。     

Single Homelessness as Social Exclusion: The Unique and the Extreme

Recent research into single homelessness and rough sleeping has begun to consider the issue using the concepts and the language of social exclusion. This paper considers the new literature and what it may mean in terms of changing our understanding of single homelessness and rough sleeping (called street homelessness in the United States). The paper begins by reviewing the concept of social exclusion and the recent literature on single homelessness and drawing associations between the analysis of social exclusion and the emerging academic work on the nature of single homelessness and rough sleeping. Drawing on this literature, it is argued that single homelessness needs to be reconceptualized and viewed as one of the products generated by the process of social exclusion. The paper concludes with the argument that single homelessness and rough sleeping are a form of social exclusion, characterized chiefly by the inability of a section of the socially excluded population to get access to welfare services and social housing, and that "homelessness" does not actually exist as a discrete social problem with unique characteristics and causes.     

智能多点温度调节仪的研制

介绍了一种智能多点温度调节仪的设计方法 ,给出了仪器的硬件总体组成框图以及输入 /输出通道、通信电路的组成框图 ,并介绍了实际应用中所采用的抗干扰措施     

单片机在高炉料流调节控制中的应用

本文介绍一种以8031单片机为核心的高炉料流调节的电脑控制器．该控制器具有设计新颖、可靠性高、性能稳定、结构简单、控制精度高和成本低廉等特点．经模拟实验验证，满足技术要求，对机电系统的改造具有一定的借鉴作用．     

一种电气化铁路接触网开关微机监控系统

提出了一种适用于电气化铁路接触网开关集中控制的分布式微机监控系统；给出了系统结构，硬件构成及软件设计。实验及现场运行表明，该系统设计合理，性能可靠     

Recurrence relations for single and product moments of order statistics from a generalized half logistic distribution with applications to inference

In this paper, we derive several recurrence relations satisfied by the single and product moments of order statistics from a generalized half logistic distribution. These generalize the corresponding results for the half logistic distribution established by Balakrishnan (1985). The relations established in this paper will enable one to compute the single and product moments of all order statistics for all sample sizes in a simple recursive manner; this may be done for any choice of the shape parameter k. These moments can then be used to determine the best linear unbiased estimators of location and scale parameters from complete as well as Type-I1 censored samples.     

试论技术创新战略取向的根本性转变

自然资源、生态环境以及社会人文等系统对于传统的以追求经济利益为惟一目标的单维度取向的技术创新的支撑能力的不断弱化,迫使我们不得不对技术创新的内涵和外延进行反思,并提出由单维度取向的技术创新战略向多维度取向的技术创新战略转型的新命题。     

中国省际建设用地单要素效率评价与区域差异研究

以单要素效率理论作基础,用1999-2008年全国分省数据,测度不同省份建设用地单要素效率,且对单要素效率的空间变化进行分析.结果表明2008年全国各省建设用地单要素效率平均值是0.5009,总体水平不高;从东部至西部,建设用地单要素效率递减;1999-2008年间东中西三大地区建设用地单要素效率均处在上升态势,上升幅度分别是:0.0405、0.0298和0.0253.研究认为1999 -2008年我国建设用地供给调控政策无论在东部还是中西部皆取得一定绩效,但东部地区调控效果显著好于中西部;应以建设用地单要素效率作依据,结合不同地区资源禀赋状况、经济发展阶段和区域功能定位实施差别化的建设用地调控政策.