高精度局域定向定位技术及其精度分析

针对目前自主局域定向定位的需求,文中提出了一种在近场模型下反向利用阵列信号处理相关理论实现阵列自身的高精度定向定位方法,仿真实验表明该方法可以有效实现阵列的高精度定向定位.进一步对该方法的定向定位精度进行了理论分析,通过仿真分析了阵列所处位置、信号源数目、阵列自身天线阵元数目以及信号源位置存在误差时对定向定位精度的影响,相关实验结论具有重要的工程应用指导意义.     

Improving water service to the urban poor through delegated management: Lessons from the city of Kisumu,Kenya

Partnerships like the delegated management model (DMM), in which a utility delegates management of infrastructure and service delivery to slum residents, are being promoted to improve services to the urban slums in sub‐Saharan Africa. However, there is little empirical evidence of the benefits that DMM offers beneficiaries and its potential limitations. This study, conducted in 2013, compared water service in two slums in the city of Kisumu in Kenya where DMM has been implemented with another where it has not been implemented. Results showed that DMM had lowered the cost of water compared to water kiosks in neighbourhoods in which DMM had not been implemented. The study findings contribute toward an evidence base for stakeholders and regulators who see an opportunity in the integration of DMM into local drinking water provision solutions in urban slums.     

中国海岸城市带形成与新世纪地缘政治研究

中国历史上的中心城市多分布于大陆内地,但自19世纪以来的两百年间,在海岸线上出现了众多的中、大及特大城市,构成为一条蔓延1.8万公里的海岸城市集合群。中国海岸城市带的形成,不仅带来了国内社会经济文化全方位的深刻变化,刷新了中华传统文明中的海洋篇章,也将对于21世纪的东亚地缘政治以及全球化国际关系诸方面,发挥出越来越巨大的影响,值得从多重角度加以研究。     

Nonparametric control charts based on runs and Wilcoxon-type rank-sum statistics

In this article, we introduce three new distribution-free Shewhart-type control charts that exploit run and Wilcoxon-type rank-sum statistics to detect possible shifts of a monitored process. Exact formulae for the alarm rate, the run length distribution, and the average run length (ARL) are all derived. A key advantage of these charts is that, due to their nonparametric nature, the false alarm rate (FAR) and in-control run length distribution is the same for all continuous process distributions. Tables are provided for the implementation of the charts for some typical FAR values. Furthermore, a numerical study carried out reveals that the new charts are quite flexible and efficient in detecting shifts to Lehmann-type out-of-control situations.     

Regional Religions?: Extending the “Semi-involuntary” Thesis of African-American Religious Participation

This research examines religious affiliation and church attendance among African-Americans in three different regions of the United States to evaluate the thesis that the Black church represents a semi-involuntary institution shaped by historical dynamics of segregation in the rural South. We extend the analyses of others who have found the rural South to have distinctive church participation patterns by examining two nationally representative data sets (the 1972–1996 General Social Surveys and the 1984 National Alcohol Study). We explore both level and type of church attendance of African-Americans, and how patterns differ by region. Further, we refine prior analyses by (1) differentiating between members of historically White and conservative churches from those in the black mainline, (2) examining racial segregation, and (3) focusing on the type of church attendance (rather than just overall level). Ordinary Least Squares (OLS) and logistic regression models support the thesis that the rural South exhibits some distinctive patterns that make the semi-involuntary institution notion a useful concept, although patterns not predicted by the thesis are also found. The semi-involuntary thesis is also used to illuminate some church attendance patterns observed outside the rural South.     

中国区域文化简论

中国的区域文化由于长期大一统的社会格局使其具有自然与人为综合构成的独特性：既有以空间地域而定的“东西”“南北”和以文化品位而定的“华夷”“中外”一级地域文化的定义和划分；又有由中原区系、南方区系、北方区系、青藏区系四大文化拼块构成的次一级文化区系。在中国区域文化的形成过程中，又经历了只有考古和文献意义的、有较强自然属性和较少人为因素的萌芽阶段；以封国独立为主要形式的区域文化成型的方国时代和以地方行政区划为类征的区域文化发展的史志阶段．而其“核心－边缘”结构的游移、变化则最终形成了我国区域文化的全面缀连。     

完善西部房地产市场的对策思考

对阻碍西部房地产市场发展的相关因素进行了具体分析 ,在此基础上提出了搞好房地产市场发展规划、调整房地产投资结构、搞好物业管理、完善房地产市场中介体系、健全相关法规的几点建议。     

抗日战争时期陕甘宁边区"难民乡"问题初探

抗日战争时期,中国共产党领导的陕甘宁边区创造性地制定政策,安置国统区难民的做法,对于我党不断提高执政水平和能力,进一步密切党群干群关系,团结和带领全国人民全面建设小康社会具有深远的历史意义和现实意义.     

论西汉对匈奴政策的演变

西汉对匈奴政策的演变大致经历了四个阶段。汉武帝元光二年(公元前133年)以前,基本上实行与匈奴"和亲"的政策;此后十多年间,试图通过军事打击以制服匈奴;漠北之战以后,又代之以政治招抚为主、军事威慑为辅的策略;汉武帝以后,汉王朝对匈奴实行了较为宽松的"羁縻"政策,汉匈双方虽有君臣名分,实为兄弟之国。西汉对匈奴政策的演变,是与其内外形势的变化和汉匈双方的力量消长密切相关的。     

基于系统协调理论的区域农业可持续发展研究

区域农业可持续发展是一个复杂的综合系统,农业可持续发展是可持续发展的基础和重要组成部分。基于系统协调原理,从可持续发展的本质出发,分析了区域农业可持续发展系统的概念、内涵、系统组成和作用机理,研究了区域农业可持续发展系统中诸子系统协调发展问题,并对河北省农业可持续发展状况进行了实证研究,经验证,其结果是可信的。最后提出实现区域农业可持续发展系统协调发展的对策。