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   855篇
  免费   21篇
各国政治   20篇
工人农民   97篇
世界政治   72篇
外交国际关系   28篇
法律   409篇
中国政治   17篇
政治理论   215篇
综合类   18篇
  2023年   4篇
  2022年   6篇
  2020年   11篇
  2019年   11篇
  2018年   17篇
  2017年   14篇
  2016年   25篇
  2015年   18篇
  2014年   20篇
  2013年   111篇
  2012年   34篇
  2011年   35篇
  2010年   27篇
  2009年   12篇
  2008年   36篇
  2007年   35篇
  2006年   38篇
  2005年   43篇
  2004年   37篇
  2003年   31篇
  2002年   31篇
  2001年   18篇
  2000年   17篇
  1999年   9篇
  1998年   12篇
  1997年   6篇
  1996年   6篇
  1995年   10篇
  1994年   11篇
  1993年   11篇
  1992年   12篇
  1991年   16篇
  1990年   14篇
  1989年   9篇
  1988年   22篇
  1987年   12篇
  1986年   13篇
  1985年   9篇
  1984年   6篇
  1983年   4篇
  1982年   8篇
  1981年   5篇
  1980年   8篇
  1979年   8篇
  1978年   6篇
  1977年   5篇
  1976年   4篇
  1975年   6篇
  1974年   3篇
  1973年   2篇
排序方式: 共有876条查询结果,搜索用时 15 毫秒
21.
Pioneering research on downstream linkages from agriculture is said to demonstrate that consumption links rather than production links are the main source of indrect growth effects, that these consumption links take the form of labour‐intensive goods and services produced locally, and that the largest farm enterprises are most locally multiplicative of activities mopping up surplus rural labour. This article has two purposes. First, the methodologies, assumptions and data base for the quantification of the local and non‐local regional multiplier effects from agricultural development are examined. Second, the contradictory interpretations for agricultural policy which have arisen from these exercises of quantification are discussed and an attempt made to explain their bases.  相似文献   
22.

In the present studies, we aimed to show that the perceived procedural fairness of societal actors’ multicultural decisions promotes ethnic minority members’ societal identification. These enhanced identification levels, in turn, contribute to better psychological health and well-being. Firstly, a vignette study in a sample of African Americans explored the effect of procedural fairness climate on identification. The second and third studies used self-report questionnaires. Study 2 consisted of a sample of sojourners in a university context, Study 3 analyzed online data through an African American sample. The studies provided evidence for the effect of procedural fairness climate on increased societal identification, which in turn mediates the fairness effect on increased well-being and psychological health. Societal actors can use procedural fairness to increase well-being when making decisions that involve ethnic minorities.

  相似文献   
23.
24.
Do parties change their platform in anticipation of electoral losses? Or do parties respond to experienced losses at the previous election? These questions relate to two mechanisms to align public opinion with party platforms: (1) rational anticipation, and (2) electoral performance. While extant work empirically tested, and found support for, the latter mechanism, the effect of rational anticipation has not been put to an empirical test yet. We contribute to the literature on party platform change by theorizing and assessing how party performance motivates parties to change their platform in-between elections. We built a new and unique dataset of >20,000 press releases issued by 15 Dutch national political parties that were in parliament between 1997 and 2014. Utilizing automated text analysis (topic modeling) to measure parties’ platform change, we show that electoral defeat motivates party platform change in-between elections. In line with existing findings, we demonstrate that parties are backward-looking.  相似文献   
25.
26.
There is now a substantial literature on slavery yet few studies directly address the gendered nature of the slave trade. In this article, the author demonstrates how women’s experiences of the trade were contingent on conflicting European stereotypes of African women, their fertility and sexual vulnerability but, also, their gendered roles in African cultures. These gender differences influenced women’s resistance and survival strategies. The middle passage represented irreversible changes in slave women’s lives but important threads of continuity also existed across the Atlantic world. On the slave ship the ‘Daughters of injur’d Africk’ forged new bonds with fellow slaves and their cultural knowledge travelled with them. Women were seminal in reworking African culture on the slave plantation and actively resisted enslavement from the moment of capture to their harsh new lives in the Americas.  相似文献   
27.
28.
We study the quality of disclosure and the level of accountability of Italian museums using MPADI2 index (Wei et al. 2008; Botes et al. 2013) on a sample of 13 annual reports which, given the legal status of some entities, encompasses the activity of 93 Italian public and private museums, many of which are within the most visited in Italy and worldwide. The results allow for an international comparison with the annual reports of a panel of USA, UK and European museums which have undergone the same MPADI2 analysis, giving an interesting insight about museum different disclosing practices across countries.  相似文献   
29.
Extensive evidence supports associations between early pubertal timing and adolescent externalizing behavior, but how and under which conditions they are linked is not fully understood. In addition, pubertal development is also characterized by variations in the relative speed at which individuals mature, but studies linking pubertal ‘tempo’ and outcomes are scarce. This study examined the mediating and moderating roles of spare time activities in associations between pubertal development and later delinquency, using data from a large (4,327 girls, 4,250 boys) longitudinal UK cohort (Avon Longitudinal Study of Parents and Children). Self-reports of Tanner stage were available from ages 9 to 14, spare time activities at age 12 and delinquency at age 15. Pubertal development was examined using latent growth models. Spare time activities were categorized using factor analyses, yielding four types (hanging out at home, hanging out outside, consumerist behavior, and sports/games), which were examined as mediators and moderators. Earlier and faster maturation predicted delinquency in boys and girls. Spare time activities partially mediated these links such that early maturing girls more often engaged in hanging out outside, which placed them at greater risk for delinquency. In addition, compared to their later and slower maturing counterparts, boys who matured earlier and faster were less likely to engage in sports/games, a spare time activity type that is linked to lower delinquency risk. No moderation effects were found. The findings extend previous research on outcomes of early maturation and show how spare time activities act as proxies between pubertal development and delinquency.  相似文献   
30.
Many studies in the literature have highlighted the utility of virtual 3D databanks as a substitute for real skeletal collections and the important application of radiological records in personal identification. However, none have investigated the accuracy of virtual material compared to skeletal remains in nonmetric variant analysis using 3D models. The present study investigates the accuracy of 20 computed tomography (CT) 3D reconstruction models compared to the real crania, focusing on the quality of the reproduction of the real crania and the possibility to detect 29 dental/cranial morphological variations in 3D images. An interobserver analysis was performed to evaluate trait identification, number, position, and shape. Results demonstrate a false bone loss in 3D models in some cranial regions, specifically the maxillary and occipital bones in 85% and 20% of the samples. Additional analyses revealed several difficulties in the detection of cranial nonmetric traits in 3D models, resulting in incorrect identification in circa 70% of the traits. In particular, pitfalls included the detection of erroneous position, error in presence/absence rates, in number, and in shape. The lowest percentages of correct evaluations were found in traits localized in the lateral side of the cranium and for the infraorbital suture, mastoid foramen, and crenulation. The present study highlights important pitfalls in CT scan when compared with the real crania for nonmetric analysis. This may have crucial consequences in cases where 3D databanks are used as a source of reference population data for nonmetric traits and pathologies and during bone-CT comparisons for identification purposes.  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