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.     

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。     

Feature selection based on distance correlation: a filter algorithm

Feature selection (FS) is one of the most powerful techniques to cope with the curse of dimensionality. In the study, a new filter approach to feature selection based on distance correlation is presented (DCFS, for short), which keeps the model-free advantage without any pre-specified parameters. Our method consists of two steps: hard step (forward selection) and soft step (backward selection). In the hard step, two types of associations, between univariate feature and the classes and between group feature and the classes, are involved to pick out the most relevant features with respect to the target classes. Due to the strict screening condition in the first step, some of the useful features are likely removed. Therefore, in the soft step, a feature-relationship gain (like feature score) based on the distance correlation is introduced, which is concerned with five kinds of associations. We sort the feature gain values and implement the backward selection procedure until the errors stop declining. The simulation results show that our method becomes more competitive on several datasets compared with some of the representative feature selection methods based on several classification models.     

后股权分置时代的投资银行激励机制变革研究

股权分置改革完成后的外部市场环境进一步加剧了投资银行间的市场化竞争,人才竞争尤为重要,而目前国内投资银行激励机制还存在诸多问题,要吸引人才、留住人才,构建长期激励机制势在必行。本文分析了投资银行实施股权激励的可行性和优势所在,并对目前我国投资银行有效推行股权激励的几个关键问题提出的对策进行了阐述。     

金融控股公司利益冲突的防范

金融控股集团属于金融创新的范畴。这一新的经济形式不仅突破了传统的经营理念,而且对既存的监管制度提出了严峻的挑战,如利益冲突及与此相联的风险问题。本文通过分析利益冲突的表现及美英有关防范利益冲突的金融防火墙制度,提出我国的金融防火墙建议。     

德川将军的文化政策

本文试图探索文明遭遇碰撞后,近世日本做出的选择对其近代化所起到的作用,着重分析了德川时期面对强势文明的冲击,五位将军做出的不同选择.他们所实行的文化政策就像分水岭,把日本对西洋文明的态度分成了前后承起的几个阶段.正是这种选择力的成功启动,成为日本完成近代转型的主要动因.     

日本邮政民营化改革及其启示

20世纪80年代以来,随着世界范围通讯技术的进步以及新公共管理运动的兴起,国家垄断经营形式下邮政事业所存在的弊端逐渐显现,邮政改革成为波及世界范围的改革潮流。当前,我国正处于邮政改革的关键时期。他山之石,可以攻玉。日本在邮政事业改革中面临的问题与我国现阶段有很多类似之处,研究日本邮政事业所面临的问题,以及邮政民营化改革中的制度设计、基本方针、具体步骤和措施等,对干完善我国的邮政体制改革具有一定的启示和借鉴意义。     

基本养老保险覆盖面扩展决定因素实证研究

扩大基本养老保险覆盖面是我国社会保障制度改革的优先目标之一。本文通过对19982003年分省数据的实证分析,发现各省之间的基本养老保险覆盖面的差异,主要是由它们的经济发展水平和市场化程度这两个宏观经济因素与基本养老金给付标准和财政对社会保障补助支出这两个政策因素共同决定的。基于这些发现,考虑到我国经济持续发展和市场化改革深化的趋势,我们对我国社会保障事业的发展持谨慎乐观的态度,并认为在目前,“低水平、高覆盖”仍然是一个符合国情、必须坚持的合理政策选择,地方政府应当在财力许可的范围内,增加对社会保障事业的财政投入。