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   2050篇
  免费   80篇
  国内免费   16篇
管理学   112篇
劳动科学   1篇
民族学   19篇
人口学   21篇
丛书文集   224篇
理论方法论   105篇
综合类   1218篇
社会学   186篇
统计学   260篇
  2024年   6篇
  2023年   21篇
  2022年   17篇
  2021年   17篇
  2020年   50篇
  2019年   61篇
  2018年   56篇
  2017年   77篇
  2016年   39篇
  2015年   38篇
  2014年   83篇
  2013年   206篇
  2012年   135篇
  2011年   146篇
  2010年   110篇
  2009年   129篇
  2008年   116篇
  2007年   150篇
  2006年   135篇
  2005年   117篇
  2004年   107篇
  2003年   93篇
  2002年   88篇
  2001年   56篇
  2000年   34篇
  1999年   14篇
  1998年   11篇
  1997年   7篇
  1996年   4篇
  1995年   3篇
  1994年   4篇
  1993年   4篇
  1992年   3篇
  1991年   1篇
  1989年   3篇
  1988年   1篇
  1986年   1篇
  1985年   2篇
  1984年   1篇
排序方式: 共有2146条查询结果,搜索用时 0 毫秒
31.
不少语言学家在语言研究过程中对词汇和句法之间存在的同时兼有词汇和句法特征的板块结构给予了关注,并由此提出了词汇法教学。词块自身的特点和优势决定了加强词块教学可以提高学习者语言产出的能力,即英语口语能力及写作能力。  相似文献   
32.
The main purpose of dose‐escalation trials is to identify the dose(s) that is/are safe and efficacious for further investigations in later studies. In this paper, we introduce dose‐escalation designs that incorporate both the dose‐limiting events and dose‐limiting toxicities (DLTs) and indicative responses of efficacy into the procedure. A flexible nonparametric model is used for modelling the continuous efficacy responses while a logistic model is used for the binary DLTs. Escalation decisions are based on the combination of the probabilities of DLTs and expected efficacy through a gain function. On the basis of this setup, we then introduce 2 types of Bayesian adaptive dose‐escalation strategies. The first type of procedures, called “single objective,” aims to identify and recommend a single dose, either the maximum tolerated dose, the highest dose that is considered as safe, or the optimal dose, a safe dose that gives optimum benefit risk. The second type, called “dual objective,” aims to jointly estimate both the maximum tolerated dose and the optimal dose accurately. The recommended doses obtained under these dose‐escalation procedures provide information about the safety and efficacy profile of the novel drug to facilitate later studies. We evaluate different strategies via simulations based on an example constructed from a real trial on patients with type 2 diabetes, and the use of stopping rules is assessed. We find that the nonparametric model estimates the efficacy responses well for different underlying true shapes. The dual‐objective designs give better results in terms of identifying the 2 real target doses compared to the single‐objective designs.  相似文献   
33.
宋则 《创新》2011,5(6):5-7,134,126
面对新的发展形势和经济任务,应该明确提出产业结构调整的新思路,即政府创造条件,靠市场来调结构。“十二五”期间,最优先考虑的问题应该是如何改革、如何转变结构调整的方式。倘若“调结构”的方式、特别是实体经济中制造业“调结构”的方式不能率先改革,转变发展方式的诸多目标就有可能落空。“十二五”期间的政策落脚点在于继续加快培育“统一开放、竞争有序”的现代市场体系的进程,切实贯彻中央一再强调的“资源配置要建立在市场调节的基础上”的施政原则,把产业结构的市场化调节落到实处。对于以制造业为基础的结构存量调整的方式,要基本实现从行政化到市场化的转变,强化金融、商贸等服务业的疏导、中介功能,创建有利于推进服务业深度参与存量结构调整和产业升级的体制政策环境。  相似文献   
34.
李晓东  刘义军  李秀芳 《创新》2011,5(2):105-108,128
在研究职业教育城乡一体化的过程中,课题组研究探讨出一套根据一个地区或一个职业院校的教育资源合理确定这一地区或者这一学校的招生规模,达到充分利用教育资源,获得最好的教育效益和经济效益的各种定量方法,从而为教育管理部门和职业院校运用数学和经济学理论合理确定招生规模提供参考。  相似文献   
35.
This article considers testing serial correlation in partially linear additive errors-in-variables model. Based on the empirical likelihood based approach, a test statistic was proposed, and it was shown to follow asymptotically a chi-square distribution under the null hypothesis of no serial correlation. Finally, some simulation studies are conducted to illustrate the performance of the proposed method.  相似文献   
36.
In this paper we propose a new lifetime model for multivariate survival data in presence of surviving fractions and examine some of its properties. Its genesis is based on situations in which there are m types of unobservable competing causes, where each cause is related to a time of occurrence of an event of interest. Our model is a multivariate extension of the univariate survival cure rate model proposed by Rodrigues et al. [37 J. Rodrigues, V.G. Cancho, M. de Castro, and F. Louzada-Neto, On the unification of long-term survival models, Statist. Probab. Lett. 79 (2009), pp. 753759. doi: 10.1016/j.spl.2008.10.029[Crossref], [Web of Science ®] [Google Scholar]]. The inferential approach exploits the maximum likelihood tools. We perform a simulation study in order to verify the asymptotic properties of the maximum likelihood estimators. The simulation study also focus on size and power of the likelihood ratio test. The methodology is illustrated on a real data set on customer churn data.  相似文献   
37.
This research study explores the strategies adopted by 60 parents of children between 3 and 9 years of age considered to have engaged in violent behaviour, within the meaning of the Safe Schools Act (Ontario Ministry of Education, Canada, 2000). This legal framework requires parents to be involved in the decisions concerning their children. Parents’ perceptions of their involvement lead them to develop coping strategies enabling them to play a more active role in such decision making. This article analyzes their perceptions according to a strengths-based approach and seeks to provide a mediation perspective to social work practice with families.
Marie DroletEmail:
  相似文献   
38.
本文概述了全球妇女创业在性别差距、创业动机、创业活动涉及的行业范围、年龄、就业情况、教育、收入、女性创业心态等方面的现状,并以此为依据,分析了全球创业环境因素与女性创业自身特点对女性创业的影响,提出了促进女性创业的对策.  相似文献   
39.
Community practitioners are often challenged to work in complex environments and situations that naturally occur in communities. This article focuses on the theoretical and practical use of the Emergence-Based Approach that is relevant for work in complex community situations. Using this approach, the practitioner encourages the emergence of novel ideas and initiatives, and engages a decentralized network of activists, helping them develop their initiatives. Using a field study, we compare this approach to the traditional Outcomes-Based Approach. Although their mindsets are very different, and even contradict one another, we suggest practical ways to combine the two in an effective way.  相似文献   
40.
For social work education in the Netherlands, the rapid transition towards superdiversity means that its capacity to adapt to this new reality and to adjust to diverse students’ backgrounds is fiercely challenged. The key aim of this article is to discuss how social work educators are dealing with the unsettling challenges of increasing diversity, based on the research outcomes of an explorative study amongst Turkish–Dutch and Moroccan–Dutch female professionals. Two different groups of educators were asked to comment on the outcomes of this study. One of the dilemmas for educators is to determine what can be considered supportive and inclusive and as reducing inequality in education. The authors used two key theoretical concepts, ‘superdiversity’ and ‘the capability approach’. These theoretical perspectives were used to deconstruct the rather massive concepts of diversity and social justice, by emphasising contextual approaches. Both perspectives stress the urgent need to involve students as ‘active agents of change’, by building a social work community to stimulate and facilitate an on-going dialogue. To successfully fulfil a pivotal role in the upward mobility or emancipation of ethnic minority students, social work education needs to be adjusted to accommodate diverse student groups.  相似文献   
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