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   13715篇
  免费   134篇
  国内免费   60篇
管理学   1707篇
民族学   142篇
人才学   1篇
人口学   2454篇
丛书文集   427篇
理论方法论   638篇
综合类   2678篇
社会学   4555篇
统计学   1307篇
  2024年   6篇
  2023年   19篇
  2022年   66篇
  2021年   91篇
  2020年   43篇
  2019年   42篇
  2018年   1713篇
  2017年   1724篇
  2016年   1127篇
  2015年   158篇
  2014年   182篇
  2013年   222篇
  2012年   550篇
  2011年   1400篇
  2010年   1302篇
  2009年   1040篇
  2008年   1026篇
  2007年   1281篇
  2006年   256篇
  2005年   432篇
  2004年   420篇
  2003年   305篇
  2002年   207篇
  2001年   119篇
  2000年   65篇
  1999年   26篇
  1998年   10篇
  1997年   8篇
  1996年   32篇
  1995年   6篇
  1994年   3篇
  1993年   1篇
  1992年   3篇
  1991年   4篇
  1990年   1篇
  1989年   2篇
  1988年   11篇
  1986年   1篇
  1985年   3篇
  1981年   1篇
  1974年   1篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
131.
太平天国运动是中国历史上规模最大的一次农民起义,对中国近代史产生了巨大影响.太平天国立国期间曾铸造过自己的钱币,具有很高的历史和文化收藏价值,成为太平天国的一个重要组成部分.由于战乱,太平天国钱币存世较少,但不影响其历史价值,有必要在前人研究太平天国钱币的基础上对这些研究成果作一概述,以期为其他学人进一步研究太平天国钱币提供借鉴.  相似文献   
132.
党的十八、十九大均指出,生态文明建设功在当代、利在千秋。十九大进一步明确提出要构建“政府主导、社会协同、公众参与、法治保障”的生态文明建设新局面。《环境保护公众参与办法》的出台为公众参与环境保护提供了强有力的制度保障,但公众的参与程度与许多因素有关。在积极发动和鼓励公众参与生态文明建设的过程中,政府可发挥新媒体协商平台的作用,提高新媒体的回应能力,为公众参与生态文明建设提供保障;公众应借助新媒体互动平台的功能,进一步提升生态意识,践行生态行为,自觉维护生态环境;环保组织要发挥新媒体的聚焦作用,推动环保组织的成长壮大。  相似文献   
133.
Most romantic relationships start with a living apart together (LAT) phase during which the partners live in two separate households. Over time, a couple might decide to move in together, to separate, or to remain together while maintaining their nonresidential status. This study investigates the competing risks that partners in a LAT relationship will experience the transition to coresidence or to separation. We consider the amount of time LAT partners have to travel to see each other to be a key determinant of relationship development. For our statistical analyses, we use seven waves of the German Family Panel Pairfam (2008/2009–2014/2015) and analyze couples in the age group 20–40 years. We distinguish between short-distance relationships (the partners have to travel less than one hour) and long-distance relationships (the partners have to travel one hour or more). Estimating a competing risks model, we find that couples in long-distance relationships are more likely to separate than those living in close proximity. By contrast, the probability of experiencing a transition to coresidence is lower for LAT couples in long-distance than for those in short-distance relationships. Interaction analyses reveal that distance seems to be irrelevant for the relationship development of couples with two nonemployed (unemployed, in education or other inactive) partners.  相似文献   
134.
135.
136.
Previous research has shown that there are a number of risk factors for disordered and problem gambling, including an individual’s ethnicity and age. Endorsing gambling as an escape has also been shown to contribute to and maintain disordered gambling. The present study examined potential interactions between ethnicity and age as they relate to disordered gambling, as well as if ethnicity and age would be predictors of endorsing gambling as an escape. Three hundred fifteen adults from the United States completed measures relating to gambling. Participants were grouped into ethnic categories of Caucasian and non-Caucasian, and age groups of 18–25, 26–35, 36–55, and 56 years old and above. Non-Caucasians reported more gambling problems than Caucasians. A significant interaction was found between ethnicity and age for 36–55 year olds. Overall, participants were more likely to gamble for positive than negative reinforcement. However, only gambling as an escape was a significant predictor of disordered gambling. Implications and limitations are discussed with the thought that these results are informative to practitioners treating disordered gambling.  相似文献   
137.
138.
To compare two modes of administration (self-administered; by interviewer) and two response options format (using words; images of “facial-expressions”) of the first question of SF-36 (Q1SF-36), and to test its validity. We included 825 participants (20–90 years). Q1SF-36, using words or images, was included in a global questionnaire interview and at the end participants filled the SF-36. The agreement was tested by weighted kappa coefficients (WKappa). Classification Trees were used in the calibration of Q1SF-36 responses, with the physical (PDSF36) and mental dimensions of SF-36. Polyserial correlation coefficients and areas under the ROC curves (AUC) were used for validation. After categorization, using PDSF36 classification trees, the WKappa were 0.770 (self-administered vs. interviewer), 0.569 (self-administered vs. facial-expressions) and 0.566 (interviewer vs. facial-expressions). The WKappa between the PDSF36 and the modes (self-administered, interviewer and facial-expressions) were 0.784, 0.713 and 0.579 and the corresponding polyserial correlation coefficients were 0.784, 0.713 and 0.579. A good discriminatory power was found comparing the modes with the PDSF36 (AUC = 0.907, 0.923 and 0.827), but not with mental dimension (AUC = 0.538, 0.501 and 0.629). The Q1SF-36, by self-administration or interviewer, may be a valid alternative for assessment of subjective physical health, but not mental health.  相似文献   
139.
140.
Social service contracting to nongovernmental organizations is popular form of privatization across the world. Although nonprofits are preferable social service providers for legal and normative reasons, governments in the United States increasingly rely on for-profit organizations to deliver social services. This trend warrants further exploration about whether nonprofits or for-profits perform according to theoretical expectations when they exist in the same market. This study employs qualitative comparative analysis (QCA) to examine how sector-public, nonprofit, and for-profit-combines with structural variables to produce acceptable contract performance in juvenile justice programs. QCA is a discovery-oriented research tool that determines whether combinations of variables within cases produce a specific outcome and whether those combinations are consistent across cases. I find sector is not a necessary or sufficient predictor of acceptable performance on its own. Rather it combines with market factors to lead to acceptable contract performance. Combinations vary by sector, indicating that sectors behave differently in similar circumstances. The primary theoretical contribution of this paper is to provide a nuanced account of contract performance in mixed sector markets.  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