首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2085篇
  免费   102篇
  国内免费   3篇
管理学   151篇
民族学   9篇
人口学   43篇
丛书文集   99篇
理论方法论   101篇
综合类   501篇
社会学   94篇
统计学   1192篇
  2024年   1篇
  2023年   6篇
  2022年   5篇
  2021年   16篇
  2020年   10篇
  2019年   60篇
  2018年   78篇
  2017年   43篇
  2016年   53篇
  2015年   59篇
  2014年   89篇
  2013年   210篇
  2012年   101篇
  2011年   109篇
  2010年   81篇
  2009年   150篇
  2008年   141篇
  2007年   167篇
  2006年   66篇
  2005年   65篇
  2004年   49篇
  2003年   65篇
  2002年   71篇
  2001年   53篇
  2000年   21篇
  1999年   14篇
  1998年   8篇
  1997年   17篇
  1996年   10篇
  1995年   30篇
  1994年   18篇
  1993年   2篇
  1992年   2篇
  1989年   3篇
  1988年   2篇
  1986年   1篇
  1985年   45篇
  1984年   51篇
  1983年   50篇
  1982年   49篇
  1981年   32篇
  1980年   31篇
  1979年   19篇
  1978年   33篇
  1977年   4篇
排序方式: 共有2190条查询结果,搜索用时 15 毫秒
81.
作为理论的"文化唯物主义"是汤普森在探索马克思主义英国化过程中,基于自己对斯大林主义的批判反思和历史研究实践,形成的一种主要适用于自由资本主义时代的历史唯物主义学说。作为范式的"文化唯物主义"是奠基在"自下而上"的观察视角、"人民历史"观念和超越资本主义的乌托邦议程这三个支撑点上的,它具有两种基本作用:真实的经验整体的倾听和再创造;大众文化的社会功能的分析与评价。  相似文献   
82.
普通高校体育选项课程改革研究   总被引:3,自引:0,他引:3  
针对广大学生对体育项目的爱好的差别,普通高校开设体育选项课已经势在必行.体育选项课中项目该如何设置,教师知识应如何更新,教学主管部门又该如何配合?这些都是实际工作中应切实解决的问题.  相似文献   
83.
For the first time, this paper uses a panel data set, the British Household Panel Survey, to analyse saving behaviour in Britain. One objective is to test the precautionary saving hypothesis, according to which households save to self-insure against uncertainty. Our results show that in accordance with this hypothesis, various measures of uncertainty based on earnings variability have a statistically significant effect on households' saving decisions. Moreover, in accordance with the life cycle model, households save more if they expect their financial situation to deteriorate. Received: 15 June 1999/Accepted: 4 January 2001  相似文献   
84.
The purpose of this article is to construct a theoretical framework characterizing the interactions among economic development, ecosystem equilibrium and possible population decline, and to discuss the population dynamics in the very long run. In our framework, economic activities bridge population and environment. On the one hand, human beings reform the environment through economic activities; on the other hand, economic activities decrease environmental resilience and increase the possibility of an environmental change in a discontinuous and irreversible pattern, as described in Arrow et al. (1995). Furthermore, a highly developed economy also causes over-specialization of human adaptation, which tends to exaggerate the impact of an environmental change on human population size. Received: 19 January 1999/Accepted: 3 July 1999  相似文献   
85.
青海厄鲁特蒙古与清朝之早期关系述略   总被引:2,自引:0,他引:2  
清定鼎之初 ,因忙于镇压中原地区的各种反抗势力 ,对于西陲各地只能采取安抚稳定的策略 ,即羁縻政策。清康熙帝之时 ,则逐步加强了对青海地区的统治和管辖 ,将青海诸部纳入中央势力范围之内。  相似文献   
86.
Since the implementation of the International Conference on Harmonization (ICH) E14 guideline in 2005, regulators have required a “thorough QTc” (TQT) study for evaluating the effects of investigational drugs on delayed cardiac repolarization as manifested by a prolonged QTc interval. However, TQT studies have increasingly been viewed unfavorably because of their low cost effectiveness. Several researchers have noted that a robust drug concentration‐QTc (conc‐QTc) modeling assessment in early phase development should, in most cases, obviate the need for a subsequent TQT study. In December 2015, ICH released an “E14 Q&As (R3)” document supporting the use of conc‐QTc modeling for regulatory decisions. In this article, we propose a simple improvement of two popular conc‐QTc assessment methods for typical first‐in‐human crossover‐like single ascending dose clinical pharmacology trials. The improvement is achieved, in part, by leveraging routinely encountered (and expected) intrasubject correlation patterns encountered in such trials. A real example involving a single ascending dose and corresponding TQT trial, along with results from a simulation study, illustrate the strong performance of the proposed method. The improved conc‐QTc assessment will further enable highly reliable go/no‐go decisions in early phase clinical development and deliver results that support subsequent TQT study waivers by regulators.  相似文献   
87.
In this article we discuss various strategies for constructing bivariate Kumaraswamy distributions. As alternatives to the Nadarajah et al. (2011) bivariate model, four different models are introduced utilizing a conditional specification approach, a conditional survival function approach, and an Arnold–Ng bivariate beta distribution construction approach. Distributional properties for such bivariate distributions are investigated. Parameter estimation strategies for the models are discussed, as are the consequences of fitting two of the models to a particular data set involving the proportion of foggy days at two different airports in Colombia.  相似文献   
88.
89.
90.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号