北方高寒地区塑膜暖棚育肥蒙古羊试验

对25岁淘汰蒙古羊进行了50天的冬季暖棚育肥试验,取得了显著的育肥效果。通过舍饲,试验组羊只期末体重4557kg,期增重686kg,平均日增重0137kg,分别比对照组的3973kg、127kg、0069kg多584kg(P<001).559kg(P<001).0068kg(P<001).试验组羊只胴体重、净肉重、净肉率、屠宰率均极显著或显著高于对照组。经核算试验组每只比对照组多收入2668元。     

Quality of Post-1965 Asian Immigrants

The reliance on an overall average approach to the labor market quality of immigrants could generate misleading information and biased policy recommendations. Focusing on Asian immigrants, this article demonstrates that much insight into immigrant quality can be gained via a diversity approach. Using the 5% PUMS data of the 1990 U.S. census, this paper shows that a common perception that the quality of post-1965 immigrants is lower than natives and earlier immigrants is invalid for post-1965 Asian immigrants. Unlike their Latin American counterparts, post-1965 Asian immigrants are generally more educated and skilled than natives. The educational level of post-1965 Asian immigrants surpasses that of their pre-1965 counterparts, despite their disadvantage in occupational attainment due to their shorter time of adaptation. Diversity also characterizes educational and occupational attainment across major post-1965 Asian immigrant groups and within each Asian immigrant group before and after 1965. Gender does not alter the advantage of post-1965 Asian immigrants over natives and their pre-1965 parallels in education, but it does complicate their occupational status. Policy implications of the findings are considered.     

Survival Convergence and the Preceding Mortality Crossover for Two Population Subgroups

In this paper, we present and develop the argument that if the survival functions for two population subgroups converge in later life, a mortality crossover must precede the occurrence of this convergence. Specifically, two survival curves, S ₁(x) and S ₂(x), associated with two distinct population subgroups, G₁ and G₂, tend to converge before all members die out, as often observed and anticipated. This convergence leads to an increased mortality acceleration for the “advantaged” group, and eventually fosters the occurrence of a mortality crossover. We present a mathematical proof for this relationship and offer several explanations for the mechanisms involved in the process of survival convergence and the preceding mortality crossover. This new presentation demonstrates that mortality crossover is a highly observable demographic event given the trend of survival convergence in later life.     

第三部门的兴起:理论假设检视和现实原由分析

论文在对第三部门兴起的理论假设进行检视的基础上,对第三部门兴起的现实原由进行分析,认为第三部门浪潮是在全球化浪潮、新公共管理运动、政府失灵以及通讯技术和教育水平提高等现实因素的共同推动下形成的。第三部门的兴起是具有必然性的现象,对发展中国家的发展具有积极的意义,发展中国家应该积极应对。     

论行政强制执行的基本原则

作为行政权行使过程中一项相对独立的法律制度,行政强制执行必须遵守下列原则:人权原则、法治原则、比例原则、制衡原则、正当程序原则、救济原则、合作与协作相结合原则。     

Binary Dynamic Logit for Correlated Ordinal: estimation,application and simulation

We evaluate the estimation performance of the Binary Dynamic Logit model for correlated ordinal variables (BDLCO model), and compare it to GEE and Ordinal Logistic Regression performance in terms of bias and Mean Absolute Percentage Error (MAPE) via Monte Carlo simulation. Our results indicate that when the proportional-odds assumption does not hold, the proposed BDLCO method is superior to existing models in estimating correlated ordinal data. Moreover, this method is flexible in terms of modeling dependence and allows unequal slopes for each category, and can be used to estimate an apple bloom data set where the proportional-odds assumption is violated. We also provide a function in R to implement BDLCO.     

"雄王"、"雒王"之"雄"、"雒"考辨——从南越"雄鸡"木简谈起

有学者认为,《旧唐书》等文献中的"雄王"是从《水经注》中的"雒王"讹变而来,这种认识是不正确的.本文通过文献学和语言学的分析,认为2005年初广州出土南越木简中"雄鸡"简反映的命名特点与交趾地区"厥气惟雄"的风俗不仅地域上同在南越国境内,而且时代相同,应有紧密联系.南越木简的发现表明,《旧唐书》等文献中"雄王"的写法是正确的.     

论计划生育村民自治

建立健全“依法管理、村(居)民自治、优质服务、政策推动、综合治理”的长效工作机制,是《中共中央国务院关于全面加强人口和计划生育工作统筹解决人口问题的决定》(2006)对我国未来计划生育管理提出的基本要求,也是全国部分地区在人口和计划生育综合改革实践中探索出的一条基本经验。然而,对长效工作机制中的“村民自治”,人们在认识上还存在一些误区,从而导致了工作实践中的一些偏差。本文拟就计划生育村民自治中的几个基本问题谈点意见。1计划生育村民自治的概念村民自治是我国广大人民群众直接行使民主权利的一项基本社会政治制度。“计…     

我国城市化发展的区域差异及协调发展对策

中国城市化发展具有极为显著的区域差异。文章根据多元数据比较系统地阐述了我国城市化发展的省际差异特征,剖析了其形成因素;对我国未来区域城市化的发展趋势及存在的问题进行了前瞻性分析,并有针对性地提出了促进我国区域城市化协调发展的对策与措施。     

从援助型外交走向战略型外交——日本中亚外交政策的演变浅析

从上世纪90年代以来,日本的中亚外交政策发生了显著的变化,已经逐渐从原来的“援助型外交”升级为“战略型外交”。这一转变过程分为三个阶段:“经济援助主导阶段”、“经济援助与战略外交并重阶段”以及“战略外交主导阶段”。相对于时下比较流行的“贸易说”和“能源说”,本文提出了“政治战略说”来理解日本中亚外交政策升级的背后逻辑。并总结了三大具体原因,其中内因为日本对国家政治利益的追求,外因为日美同盟关系的微妙变化以及大国地区外交竞争的推动。