全文获取类型
收费全文 | 12760篇 |
免费 | 214篇 |
专业分类
管理学 | 1656篇 |
民族学 | 51篇 |
人才学 | 1篇 |
人口学 | 1098篇 |
丛书文集 | 78篇 |
教育普及 | 2篇 |
理论方法论 | 1173篇 |
综合类 | 337篇 |
社会学 | 6362篇 |
统计学 | 2216篇 |
出版年
2021年 | 67篇 |
2020年 | 190篇 |
2019年 | 220篇 |
2018年 | 245篇 |
2017年 | 367篇 |
2016年 | 283篇 |
2015年 | 231篇 |
2014年 | 254篇 |
2013年 | 2052篇 |
2012年 | 395篇 |
2011年 | 317篇 |
2010年 | 212篇 |
2009年 | 234篇 |
2008年 | 262篇 |
2007年 | 279篇 |
2006年 | 218篇 |
2005年 | 352篇 |
2004年 | 296篇 |
2003年 | 260篇 |
2002年 | 269篇 |
2001年 | 314篇 |
2000年 | 298篇 |
1999年 | 311篇 |
1998年 | 210篇 |
1997年 | 204篇 |
1996年 | 216篇 |
1995年 | 188篇 |
1994年 | 205篇 |
1993年 | 177篇 |
1992年 | 236篇 |
1991年 | 232篇 |
1990年 | 211篇 |
1989年 | 219篇 |
1988年 | 194篇 |
1987年 | 187篇 |
1986年 | 189篇 |
1985年 | 174篇 |
1984年 | 207篇 |
1983年 | 200篇 |
1982年 | 165篇 |
1981年 | 138篇 |
1980年 | 139篇 |
1979年 | 166篇 |
1978年 | 137篇 |
1977年 | 119篇 |
1976年 | 102篇 |
1975年 | 103篇 |
1974年 | 95篇 |
1973年 | 93篇 |
1971年 | 64篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
981.
As a result of the Chernobyl nuclear power plant accident in 1986, large forested areas in Europe were contaminated by radionuclides. Extensive societal pressure has been exerted to decrease the radiation dose to the population and to the environment. Thus, in making abatement and remediation policy decisions not only economic costs, but also human and environmental risk assessment are desired. Forest remediation by organic layer removal, one of the most promising cleanup policies, is considered in this paper. Ecological risk assessment requires evaluation of the radionuclide distribution in forests. The FORESTPATH model(1,2) is used for predicting the radionuclide fate in forest compartments after deposition as well as for evaluating the application of the remedial policy. Time of intervention and radionuclide deposition profile was predicted as being crucial for the remediation efficiency. Risk assessment conducted for a critical group of forest users in Belarus shows that consumption of forest products (berries and mushrooms) leads to about 0.004% risk of a fatal cancer. Cost-benefit analysis for forest cleanup suggests that complete removal of organic layer is too expensive for application in Belarus. 相似文献
982.
'Stereotype threat' refers to the state of psychological discomfort people experience when confronted by an unflattering reputation in a situation where that reputation can be confirmed by one's behavior. Once aroused, stereotype threat can have a number of disruptive effects, among them the short-term impairment of intelligent thought and academic achievement. Over time, it can prompt defensive adaptations that have far-reaching effects, such as disengagement from activities or domains where the stereotype is relevant, which in turn can lead to impaired intellectual development. Stereotype threat thus can result in a self-fulfilling prophecy whereby a person comes to resemble his or her reputation, living up or down to social expectations. This article reviews the development of the stereotype threat construct from Steele and Aronson's (1995 ) original demonstration to investigations of its generality and mediators and to more recent studies focusing on strategies for reducing its negative effects. 相似文献
983.
A. R. Tricker 《Journal of applied statistics》1990,17(3):329-340
In a previously published study, the effects of rounding on the significance and power of four test statistics were considered when the parent population was normal. Here we investigate how these tests will perform for rounded non-normal data. Guidelines are given on how the degree of precision recommended for normal populations can be applied when the population is non-normal. 相似文献
984.
Hilde H. Wierda‐Boer Jan R.M. Gerris Ad A. Vermulst 《Journal of marriage and the family》2008,70(4):1004-1014
Using questionnaire data on 149 Dutch dual‐earner couples with young children participating in the European Famwork study, we examine how adaptive strategies and gender ideology relate to parents’ perceived success in balancing work and family. Path analysis indicates that some adaptive strategies may harm individuals’ work‐family balance, particularly when they are made in the domain where the time budget is limited. In the need to succeed in multiple roles, however, endorsement of traits traditionally linked with the opposite gender, that is masculine traits for women and feminine traits for men, seems beneficial. We speculate that two underlying mechanisms — social pressure and time constraints — jointly operate in determining perceived success in balancing work and family. 相似文献
985.
The National Research Council advocates for what they term a risk democracy, in which risk issues require community decision-making based on dialogue. This essay focuses on the promotion of civic responsibility in a risk democracy. Award-winning public awareness campaigns are analyzed to demonstrate how community partnerships and civic responsibility can improve community resilience. First, the role of a community in an emergency is discussed; second, the current focus of the Department of Homeland Security on prevention rather than preparation as illuminated by interviews with emergency managers is critically examined; and finally, public awareness campaigns are presented to show how personal and civic responsibility can assist in emergency planning and response. 相似文献
986.
987.
Mindy E. Scott Alan Booth Valarie King David R. Johnson 《Journal of marriage and the family》2007,69(5):1194-1209
Research indicates that closeness of the father‐child bond following parental divorce is associated with better outcomes for children and adolescents. Unlike other investigations, this study takes a long‐term developmental approach to understanding stability and change in postdivorce father‐adolescent relationship closeness. Drawing on Add Health data (n = 483), we examine factors that explain (a) why some high‐quality father‐adolescent relationships remain the same after divorce whereas others decline, and (b) why some low‐quality relationships are stable following divorce whereas others improve. High mother‐offspring relationship quality and offspring feelings of well‐being prevented close father‐offspring relationships from deteriorating. Offspring’s childbearing and cohabitation following parental divorce increase closeness in father‐offspring relationships that were not close prior to divorce. Although a majority of offspring experienced a decline in closeness following divorce, results from this study show that some very close father‐offspring relationships are maintained and some poor relationships become closer. 相似文献
988.
Legalizing abortion can either increase or decrease investments in children's human capital. This article finds that abortion increases the number of out-of-wedlock births. Using data that more directly links the criminal with age when the crime was committed, not age when arrested, and fixing the assumption in previous research that no abortions took place prior to the Roe v. Wade decision in the 45 states affected by that decision, we find consistent significant evidence that legalizing abortions increased murders by over 7%. Linear estimates indicate that legalization increased total annual victimization costs by at least $3.2 billion. ( JEL K42, K14, J24) 相似文献
989.
Mind-Reading and Metacognition: Narcissism, not Actual Competence, Predicts Self-Estimated Ability 总被引:5,自引:3,他引:2
In this paper, we examine the relationship between people's actual interpersonal sensitivity (such as their ability to identify deception and to infer intentions and emotions) and their perceptions of their own sensitivity. Like prior scholars, we find the connection is weak or non-existent and that most people overestimate their social judgment and mind-reading skills. Unlike previous work, however, we show new evidence about who misunderstands their sensitivity and why. We find that those who perform the worst in social judgment and mind-reading radically overestimate their relative competence. We also find origins of these self-estimates in general narcissistic tendencies toward self-aggrandizement. We discuss evidence from two studies, one involving the Interpersonal Perception Task (the IPT-15) and another focusing on inferences about partners after a face-to-face negotiation exercise. In both cases, actual performance did not predict self-estimated performance but narcissism did. 相似文献
990.