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.     

明代边疆史籍刊刻探研

明代边疆史籍的刊刻上受不断深化的边疆危机的刺激,下承宽松的出版政策之泽,获得了突飞猛进的发展.明代边疆史籍的刊刻分为官刻与私刻两大类.官刻得到朝野的充分重视,特点鲜明.私刻中的坊刻内容丰富,多以丛书的形式在社会上流传;家刻的目的不尽相同,但最终也往往推向市场.明代边疆史籍的刊刻特色鲜明,其经世致用意识强烈、作品种类繁多、体裁体例丰富,对后世产生了深远影响.     

Efficiency determinants in retail stores: a Bayesian framework

This paper analyzes the impact of vertical integration, age, geographic expansion, and low price strategy on the cost efficiency of retail stores. We test our hypotheses using the innovative Bayesian frontier methodology. The data involve a sample of Spanish retail stores that operate in a highly competitive and dynamic environment. From the results, it is clear that cost efficiency is higher for stores that have: longer years in business, stronger geographical presence, and lower price offerings. Vertical integration, on the other hand, is negatively related to efficiency. Further discussions of these findings and related managerial implications are provided in the paper.     

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.     

A Review on Socioeconomic Status of Sichuan Frontier Areas in the Modern Writings of the Foreigners

In the 32nd year of the Guangxu period in the Qing dynasty ( 1906 ) , a position of“minister for managing frontier affairs” ( bianwu dachen) of Sichuan and Yunnan was set up .It was responsible for man...     

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。     

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.     

威拉·凯瑟笔下的女性形象

威拉·凯瑟作为美国小说史上一位主要的作家,经受了历史的考验。威拉·凯瑟的小说是伴随着她笔下成熟女性形象及边正发展题材的故事而逐渐走向完善的。威拉·凯瑟的小说反映了她对于美国女性文化的一种渴求与探索。     

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。     

代理证券相对有效性

分析了具有特定的期望收益率向量R与风险因子向量β截面关系的代理证券组合边界,进而研究了代理证券组合边界与有效证券组合边界的差异以及代理证券相对有效度。