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   13727篇
  免费   289篇
  国内免费   15篇
管理学   1629篇
民族学   82篇
人才学   1篇
人口学   1220篇
丛书文集   146篇
理论方法论   1283篇
综合类   702篇
社会学   7297篇
统计学   1671篇
  2023年   74篇
  2021年   115篇
  2020年   219篇
  2019年   272篇
  2018年   350篇
  2017年   509篇
  2016年   347篇
  2015年   290篇
  2014年   327篇
  2013年   2145篇
  2012年   508篇
  2011年   496篇
  2010年   412篇
  2009年   352篇
  2008年   416篇
  2007年   436篇
  2006年   434篇
  2005年   373篇
  2004年   302篇
  2003年   267篇
  2002年   278篇
  2001年   349篇
  2000年   292篇
  1999年   275篇
  1998年   205篇
  1997年   170篇
  1996年   160篇
  1995年   177篇
  1994年   159篇
  1993年   162篇
  1992年   185篇
  1991年   190篇
  1990年   188篇
  1989年   159篇
  1988年   167篇
  1987年   194篇
  1986年   147篇
  1985年   158篇
  1984年   176篇
  1983年   151篇
  1982年   151篇
  1981年   121篇
  1980年   111篇
  1979年   122篇
  1978年   95篇
  1977年   79篇
  1976年   93篇
  1975年   109篇
  1974年   85篇
  1972年   62篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
181.
Summary The theory of the low-level equilibrium trap asserts that an increase in income stimulates population growth sufficiently so that the additional people 'eat up' the 'surplus' over subsistence, and hence drive the level of income back to subsistence. Originally the theory referred primarily to mortality, but nowadays its application is to fertility. In the long-run equilibrium context in which the theory is ordinarily presented, the fact that the long-run elasticity of fertility with respect to income is negative in less developed countries fatally contradicts the accepted version of the trap. But to give every chance for trap theory to be meaningful, the paper presents a period-by-period analysis, embodying larger-than-observed positive elasticities during the early years and the logically necessary counterbalancing negative elasticities during the later years. These elasticities are combined with consumption and production figures for various age groups to estimate the effect in each year after the windfall, and altogether. The results show that even under assumptions not charitable to the conclusion of this paper, additional children do not even come close to 'eating up' the increase in income which induced their births, so that the trap theory is falsified.  相似文献   
182.
183.
Most evaluators seem to presume that all evaluative studies should result in conclusive evidence. Often, however, less than conclusive evidence may not only suffice, but be the only real alternative under conditions of limited evaluation resources. Three levels of evidence common to evaluation studies are discussed: suggestive evidence, preponderant evidence, and conclusive evidence. Ten factors are also presented which can be used to determine the level of certainty appropriate for a given evaluation study. Consideration of these factors enables the evaluator to specify when less than conclusive evidence is acceptable.  相似文献   
184.
Jones JM  McNeely RL 《Child welfare》1981,60(3):148-160
An innovative model for the training of social welfare students in the special skills essential in child welfare work is predicated upon a classification system of children at risk and a continuum of services.  相似文献   
185.
Neighborhood opposition to community-based treatment centers (CBTCs) has prompted fears that these centers will become concentrated in inner city, "transitional neighborhoods." These neighborhoods are thought to lack the willingness and/or resources to oppose CBTCs. This paper examines the distribution of CBTCs in a northern metropolitan county. The findings suggests that the fears of "ghettoization" may be real only for certain types of centers. Most centers were located in higher-status city and suburban neighborhoods. However, these centers were physically or visually isolated from the surrounding housing, making them less likely to attract attention and therefore less likely to arouse neighborhood opposition.  相似文献   
186.
187.
During the summer of 1972 in-depth interviews were conducted with 96 Shoshone and Arapahoe Indian women living on the Wind River Reservation in Central Wyoming. All were aged 15-49 and were users of the reservation health service. It was found the women fell into 4 groups: current contraceptive users, 42.7%; pregnant or seeking to become pregnant, 10.4%; infertile due to menopause or sterilization, 18.8%; and fertile never-users, 28.1%. The contraceptive users tended to be older, married, and have as many children as they want. The fertile never-users tended to be in their teens and generally unmarried. When asked why they did not use contraception their answer was 'because I am not married.' It is suggested that general education on contraception be provided the younger women so that when they achieve desired family size they will be informed as to family planning methods. It was found that religious belief against contraception was important to the young never-users, but not to the women who had completed their families. In fact, 73% of the users said their religion, which most identified as Roman Catholicism, had no influence on their contraceptive use while 27% said they were aware of church disapproval but used contraception anyway.  相似文献   
188.
Many government agencies have "constituents" who believe the agencies should hear and consider their needs and desires in establishing program priorities. This article describes how one involves interested constituents (consumers, industry, medical professionals, and state organizations) in the agency's annual priority-setting process. This participation has produced a number of beneficial results-some expected and some unexpected.  相似文献   
189.
A new version of the Profile of Nonverbal Sensitivity Test (PONS)—a standardized test of sensitivity to nonverbal cues—was developed to determine the effects of five levels or sequences of micromomentary movement on accuracy in decoding nonverbal face and body cues, presented for 125 microseconds (msecs). The five sequences were: backward movement, partially backward movement, no movement, partially forward movement, and fully forward movement. Two versions of this test—the Test of Micromomentary Movement Effects (TOMME)—were administered to two samples of female high school and college students. The results, averaged over face and body cues, showed that as the movement sequences more closely approximated the fully forward sequence, decoding accuracy increased. These results, showing the benefits of adding properly sequenced information at split second (42 msec) exposures, not only support the findings of previous researchers that micromomentary facial affect displays may be helpful in decoding nonverbal facial cues, but also suggest that micromomentary movements may be important for decoding body cues as well.  相似文献   
190.
The results of a fertility survey carried out in the USSR in 1978 are presented. The survey included 33,076 women aged 18 to 59. Data are included on fertility rates by region and Union Republic and by urban or rural area, and on expected fertility of women aged 18 to 44. Changes in actual and desired fertility over time are compared for five-year periods from 1945 to 1978. Differences in fertility are analyzed by type of settlement, educational status, and nationality.  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