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   1915篇
  免费   74篇
管理学   150篇
民族学   8篇
人口学   165篇
丛书文集   7篇
理论方法论   219篇
综合类   10篇
社会学   1290篇
统计学   140篇
  2023年   34篇
  2021年   7篇
  2020年   18篇
  2019年   23篇
  2018年   35篇
  2017年   52篇
  2016年   35篇
  2015年   32篇
  2014年   81篇
  2013年   955篇
  2012年   41篇
  2011年   46篇
  2010年   35篇
  2009年   15篇
  2008年   28篇
  2007年   20篇
  2006年   42篇
  2005年   37篇
  2004年   22篇
  2003年   18篇
  2002年   28篇
  2001年   20篇
  2000年   17篇
  1999年   12篇
  1998年   18篇
  1997年   10篇
  1996年   16篇
  1995年   12篇
  1994年   22篇
  1993年   22篇
  1992年   14篇
  1991年   18篇
  1990年   12篇
  1989年   6篇
  1988年   11篇
  1987年   13篇
  1986年   9篇
  1984年   8篇
  1983年   12篇
  1982年   8篇
  1981年   15篇
  1980年   14篇
  1979年   13篇
  1978年   10篇
  1977年   8篇
  1976年   12篇
  1975年   16篇
  1974年   6篇
  1973年   6篇
  1972年   5篇
排序方式: 共有1989条查询结果,搜索用时 625 毫秒
31.
32.
33.
34.
Psychoanalysis has long recognized the vital role that relationships between people play in human development and in the maintenance of sense of well being throughout life. While the internalization of representations of significant others and their interactions with each other, the achievement of object constancy, makes it possible to gain support from the realization that we live in the minds of others and they in ours’, it is “not enough.” We need people “in the flesh” from “cradle to grave.” Unfortunately, this need is more difficult to meet in our later years. Parents, siblings, mates, love partners die. Children move away. No longer do we have daily contact with our work colleagues. Old friends are lost, never to be replaced, making the ability to form and maintain additional friendships as well as the opportunity to do so critical in the life of the elderly. This paper considers the roles that friends play in old age, the developmental achievements that contribute to the capacity for friendship, some of the factors that may impede doing so, and finally the ways in which psychoanalytic treatment may foster an individual’s ability to be a friend and make friends.  相似文献   
35.
36.
ABSTRACT

This literature review assesses the current state of knowledge about elder abuse and mistreatment, focusing on the lack of incorporation of all forms of elder victimization and the benefits of a poly-victimization framework. This review also includes existing knowledge on risk factors and calls for a greater focus on protective factors and a greater inclusion on family and community factors. Future research, prevention, and intervention would benefit from considering the true burden of elder victimization and a greater implementation of strengths-based approaches to programs.  相似文献   
37.
Nearly 20% of South African youth experience forced or coerced sexual intercourse. Understanding the factors associated with forced sex is important for informing prevention programs aimed at reducing sexual violence and HIV and AIDS. Multilevel regression models test the association between sexual situation self‐efficacy and forced sex among 2,893 South African adolescents. Findings suggest that youth are more likely to experience forced sex after periods of time when their levels of self‐efficacy are lower than their average levels of self‐efficacy. Furthermore, youth who are lower on their self‐efficacy compared to their peers are more likely to experience forced sex. Implications for prevention research are discussed.  相似文献   
38.
Decision makers often face scheduling problems in which processing times are not known with certainty. Non-regular performance measures, in which both earliness and tardiness are penalized, are also becoming more common in both manufacturing and service operations. We model a managerial environment with task processing times (which include sequenceindependent set-up times) prescribed by three-parameter lognormal distributions. Upon completion, each task derives a reward given by a particular piecewise-linear reward function. The objective is to select a sequence of tasks maximizing the expected total reward. The relative generality of the problem renders many enumerative methods inapplicable or computationally intractable. To overcome such difficulties we develop efficient priorityinduced construction (PIC) heuristics which build up a complete schedule by inserting tasks (singly from a list) into a partial sequence of tasks. In each partial and complete sequence a period of idle time is permitted prior to the first task. Performance on realistic-sized problems is very encouraging, with cost penalties averaging less than one percent.  相似文献   
39.
This article focuses on unlikely movement actors whose civic engagement has been understudied: people with criminal records (“returning citizens”). We present findings from 18 months of ethnographic research with members (leaders) of Fighting to Overcome Records and Create Equality (FORCE), a civic group led by returning citizens. FORCE leaders received institutional support from Community Renewal Society (CRS), a larger faith and community-based organization, to lead a rights reform movement in Chicago. Findings suggest that FORCE leaders constructed notions of kinship, recognition, and power through civic capacity-building efforts—and that social belonging was core to such capacity-building efforts. While bonding social belonging occurred as FORCE leaders formed kinship with people facing similar social and economic marginality, bridging social belonging emerged as leaders felt recognized by CRS staff organizers, affiliates, and elected officials. Bonding and bridging social belonging enabled FORCE leaders, who faced constant social exclusion in society, to experience much needed kinship, recognition, and power. Future studies should continue to uncover how local capacity-building processes have life-changing relational effects on movement participants from socially and economically marginalized groups.  相似文献   
40.
Product bundling has become increasingly prevalent not only in consumer goods but also in the industrial sector. We study a purchasing problem in which a buyer must obtain necessary numbers of various stock items from a variety of vendors who charge different prices, have limited capacities and different levels of quality, and offer bundled products at discounted prices. We examine relationships among different bundling scenarios and show that the most general scenario is one in which free items are given to the buyer when sufficient quantities are purchased. We develop a mixed integer linear program that finds the purchasing strategy for the buyer that minimizes the total purchase cost. We present computational results which indicate that the problem is very tractable to solve optimally on a personal computer with standard optimization software. Finally, three extensions of the model are discussed.  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