基于GPRS无线网络的集中抄表系统设计

针对配电网结构复杂、位置分散、数据采集困难等问题,提出了一种将嵌入式软硬件技术和基于GPRS（General Packet Rdtio Service）无线通信技术相结合的远程自动抄表系统,可自动完成用户电度表网络的远程数据采集、记录、实时监测、统计分析、打印和供电控制等管理工作.该设计系统构建简单,不受地理位置限制,性价比高,工作稳定可靠.     

(Re)braiding to tell: using trenzas as a metaphorical–analytical tool in qualitative research

Metaphors can be used in qualitative research to illuminate the meanings of participant experiences and examine phenomena from insightful and creative perspectives. The purpose of this paper is to illustrate how I utilized trenzas (braids) as a metaphorical and analytical tool for understanding the experiences and perspectives of Latina teachers around being a well-educated person. Accordingly, this paper is organized into three strands. First, I discuss trenzas as a metaphorical concept in raced–gendered epistemology, highlighting the work of Chicana/Latina feminist scholars in law and education. Second, I describe how metaphorical thinking informed the methodological design. Third, I explain how I used trenzas to make sense of data and build theory. The discussion weaves the three strands together to emphasize the functional and generative nature of trenzas as a metaphorical–analytical tool for gaining critical and nuanced understandings of how personal, professional, and community identities shape participant’ experiences and perspectives.     

基于PDA设计的电力数据采集器

本文提出一个运行在WindowsCE操作系统的PDA上实现电力数据采集器的基本解决方案，并描述了各部分的设计和实现方法．在收集大量资料的基础上，作者根据自己的产品开发经验和工程的实际要求，提出了许多关键的实现方法．选用现有PDA产品设计成手持式抄表机是一个很好的方案．     

Modeling Partial Knowledge on Multiple‐Choice Items Using Elimination Testing

Single‐best answers to multiple‐choice items are commonly dichotomized into correct and incorrect responses, and modeled using either a dichotomous item response theory (IRT) model or a polytomous one if differences among all response options are to be retained. The current study presents an alternative IRT‐based modeling approach to multiple‐choice items administered with the procedure of elimination testing, which asks test‐takers to eliminate all the response options they consider to be incorrect. The partial credit model is derived for the obtained responses. By extracting more information pertaining to test‐takers’ partial knowledge on the items, the proposed approach has the advantage of providing more accurate estimation of the latent ability. In addition, it may shed some light on the possible answering processes of test‐takers on the items. As an illustration, the proposed approach is applied to a classroom examination of an undergraduate course in engineering science.     

挖掘频繁子树精简基

为了解决频繁树模式挖掘中频繁子树的数目通常太大的问题,提出了频繁子树精简基的概念,精简基由相对于一系列支持度阈值的最大频繁子树组成,它是频繁子树的一个子集,可用来估计任一频繁子树的支持度,并能将误差控制在确定范围内.提出了一个在带标号的有根的有序树的数据库中挖掘这种子树精简基的算法,该算法采用最右扩展方法系统地生成所有的频繁有序有根子树.采用的剪枝技术能尽早地剪掉一些不可能生成最大频繁子树的分枝,还采用了启发式的技术来安排计算的次序以尽可能避免代价高的计算.实验结果表明该精简基的大小不到全集的10%,算法的性能也比挖掘全集的算法要高.     

预防网络安全漏洞的程序设计

漏洞是在硬件、软件、协议的具体实现或系统安全策略上存在的缺陷,可以使攻击者能够在未授权的情况下访问或破坏系统。常见的漏洞有windows系统的漏洞、IE浏览器的漏洞等等,其实平时编程特别是网站程序中也存在着许多安全漏洞。现在的网站特别是稍大一些的网站,一般都采用ASP、     

Examining Normality in Incomplete Data Sets: A Note on a Multiple Testing Approach

A multiple testing procedure for examining the assumption of normality that is often made in analyses of incomplete data sets is outlined. The method is concerned with testing normality within each missingness pattern and arriving at an overall statement about normality using the available data. The approach is readily applied in empirical research with missing data using the popular software Mplus, Stata, and R. The procedure can be used to ascertain a main assumption underlying frequent applications of maximum likelihood in incomplete data modeling with continuous outcomes. The discussed approach is illustrated with numerical examples.     

略谈合并院校馆藏书目数据库的建设

本文分析了院校合并对高校图书馆馆藏书目数据库建设的影响，并结合本馆的实际情况，提出了高校图书馆在院校合并过程中对书目数据库建设所采取的具体措施及对策。     

论片面共同正犯

片面共同正犯是否成立,历来有肯定说和否定说之争.二者分别站在行为共同说和犯罪共同说的理论之上,来阐明各自的观点,均有一定的合理性,但也存在一定的片面性.本文从主客观相统一的原则、共同犯罪的刑法理论及现状等三个方面论述了片面共同正犯存在的合理性.     

The relationship between psychological factors and inquiry-based working by primary school teachers

Inquiry-based working by teachers includes working with an inquiry habit of mind, being data literate, contributing to a culture of inquiry at the school level, and creating a culture of inquiry at the classroom level. Inquiry-based working has been found to contribute to educational improvements and the professionalisation of teachers. This study investigates the relationship between psychological factors – attitude, experienced social pressure, self-efficacy and collective efficacy – and inquiry-based working by teachers. Questionnaire data were collected from a representative sample of 249 Dutch teachers. The results show a significant relationship between self-efficacy and all aspects of inquiry-based working. In addition, collective efficacy, attitude and experienced social pressure are all related to aspects of inquiry-based working. School leaders and teacher educators who aim to stimulate inquiry-based working should not only focus on increasing teachers’ inquiry skills, but also on psychological factors related to inquiry-based working.