关于单参数正态分布族的双边假设检验问题的讨论

讨论单参数正态分布族的双边假设检验问题,是基于考虑在第一类错误的概率为α的检验类中如何求取一个第二类错误概率最小的检验。     

喀什古代口头传播传统

作为我国西北地区一个有着悠久历史的边陲重镇,喀什自古以来就是一个多民族聚居的地方。在这里,各民族共同创造了丰富多彩的口头文学作品,形成了源远流长的口头传播传统。     

The Heyneman–Loxley effect revisited in the Middle East and North Africa: Analysis using TIMSS 2007 database

Since the controversial finding of the Coleman Report (1966), which was that school resources had little effect on educational outcomes comparing to family background, huge literature has emerged in order to verify the above finding in countries other than the United States. The Heyneman–Loxley work (1983) presented for the first time clear evidence that variation in school resource quality could matter more than variation in family inputs in low and middle income countries. Following this literature, and using TIMSS 2007 data, we attempt in this study to revisit the Heyneman–Loxley hypothesis and the related debate regarding the overall importance of schools in explaining variations in student achievement across Middle East and North African countries. Survey Jackknife regression technique and quantile regressions have been used for the purpose of this study. Our results are in line with those of Baker et al. (2002) showing that the Heyneman–Loxley effect had declined over time.     

Reviewing the Family Unit as a Stakeholder in Talent Development: Is It Undervalued?

As elite youth sport becomes more organized and professionalized, the role of the family is increasingly acknowledged as being significant in the development of young talent. High-profile examples across a range of professional sports, both positive and negative, have drawn attention toward this important stakeholder. Accordingly, this review first examines the key issues in relation to family involvement in talent development in relation to what is perceived as good and bad practice on behalf of the family. Next the key theoretical underpinning is considered, Family Systems Theory, and how it may be integrated within elite youth sport. Finally, the article concludes with a summary of where the current literature leaves us and where we can progress from here. Two possible inputs are suggested that could benefit the effectiveness of family involvement: a focus on the family holistically and a second on the role different family members can play.     

基于WIFI技术的矿井下无线语音通信系统

目前,小灵通已经被强制退市,迫切需求一种新的通信方式实现井下无线通信。本文提出了运用WiFi无线宽带技术于煤矿井下无线语音通信系统中,结合现有的WLAN网络实现无线的VoIP语音通话。     

4G移动通信技术特征及应用分析

4G移动通信技术正逐渐渗透到人们生活的各个方面。介绍了4G移动通信技术的概念及特征,分析了4G移动通信技术在高清视频播放、车联网、视频会议、智能家居、移动图书馆、多媒体即拍即传等方面的应用。     

基于iOS客户端的酒店管理系统设计与实现

介绍了使用美国苹果公司的Xcode4.5工具开发的iOS客户端酒店管理系统,详细论述了基于iPhone OS操作系统及Interface Builder图形界面的酒店管理系统的设计与实现过程。该系统是在Mac OS操作系统下进行开发的,主要面向基于iPhone OS 3.2版及以上操作的iPhone终端应用软件,可以支持iPhone终端通过无线互联网通信,实现随时随地预订点餐操作。     

通信基站通风节能研究

首先简要阐述了通信基站通风节能的现状及意义,然后对通信基站通风能耗情况进行了分析,最后研究了常见的措施对通信基站通风节能的效应。实践证明,该方案对基础运营商在节能减排、降本增效方面具有良好的效果。     

中外天文交流史研究方法及其流变

自20世纪20年代至今,中国学者对中外天文交流史的研究经历了四次明显变化。本文综合中外天文交流史的已有研究,及前人对该领域研究方法的论述,对三次重大变化加以归纳,并在统计分析近几年几种重要期刊相关研究的基础上,简述对近年出现新趋势的看法。     

浅谈标准化体系建设在铁路通信运维工作中的作用

以设备标准化、作业标准化、管理标准化为核心建立铁路通信标准化体系,为铁路运输提供安全、优质、畅通的通信服务保障。