全文获取类型
收费全文 | 3683篇 |
免费 | 101篇 |
专业分类
管理学 | 565篇 |
民族学 | 32篇 |
人才学 | 1篇 |
人口学 | 337篇 |
丛书文集 | 31篇 |
理论方法论 | 359篇 |
综合类 | 21篇 |
社会学 | 1901篇 |
统计学 | 537篇 |
出版年
2023年 | 18篇 |
2021年 | 23篇 |
2020年 | 55篇 |
2019年 | 78篇 |
2018年 | 77篇 |
2017年 | 102篇 |
2016年 | 94篇 |
2015年 | 81篇 |
2014年 | 79篇 |
2013年 | 700篇 |
2012年 | 92篇 |
2011年 | 109篇 |
2010年 | 92篇 |
2009年 | 76篇 |
2008年 | 115篇 |
2007年 | 116篇 |
2006年 | 81篇 |
2005年 | 92篇 |
2004年 | 92篇 |
2003年 | 90篇 |
2002年 | 118篇 |
2001年 | 84篇 |
2000年 | 83篇 |
1999年 | 65篇 |
1998年 | 58篇 |
1997年 | 58篇 |
1996年 | 47篇 |
1995年 | 61篇 |
1994年 | 54篇 |
1993年 | 50篇 |
1992年 | 45篇 |
1991年 | 52篇 |
1990年 | 42篇 |
1989年 | 41篇 |
1988年 | 59篇 |
1987年 | 59篇 |
1986年 | 26篇 |
1985年 | 39篇 |
1984年 | 46篇 |
1983年 | 58篇 |
1982年 | 32篇 |
1981年 | 35篇 |
1980年 | 29篇 |
1979年 | 34篇 |
1978年 | 39篇 |
1977年 | 31篇 |
1976年 | 35篇 |
1975年 | 28篇 |
1974年 | 18篇 |
1972年 | 17篇 |
排序方式: 共有3784条查询结果,搜索用时 724 毫秒
271.
272.
The ratio of a country's foreign trade (i.e., exports plus imports) to its GNP has a known tendency to decrease with country size. Previous studies have used a single year's data; but trade fluctuates greatly from year to year. This paper makes available a compilation of 1953–1972 export/GNP and import/GNP figures for 110 countries. The average import/GNP figure is found to correlate strongly with population size; the simple expression, Imports/GNP = 40 , applies, within a factor of 2, in 94% of cases. No correlation with development level can be seen. The United States data throughout its history (1799–1972) follow the same inverse cube root pattern, but with a constant of 20 instead of 40. Correlation is much poorer in the case of export/GNP ration. Export and import figures are only marginally correlated to each other. 相似文献
273.
This paper studies the implementation of the coupling from the past (CFTP) method of Propp and Wilson (1996) in the set-up of two and three component mixtures with known components and unknown weights. We show that monotonicity structures can be exhibited in both cases, but that CFTP can still be costly for three component mixtures. We conclude with a simulation experiment exhibiting an almost perfect sampling scheme where we only consider a subset of the exhaustive set of starting values. 相似文献
274.
The primary purpose of this study was to contrast the life satisfaction of midlife empty-nest and childless individuals. Seventy-two men and women reported on their satisfaction with 11 areas of life as well as with regard to children. Empty-nest individuals were more satisfied than childless persons with regard to their decisions regarding children; however, the childless individuals were not unhappy with their decisions. Empty-nest individuals were also more positive than childless individuals about contact with children. There were no differences between the two groups with regard to areas of life satisfaction not related to children; nor were there significant gender differences in life satisfaction. The results were discussed in relation to both theory and data concerning midlife satisfaction and adjustment.SMS AssociatesThe research was completed by James E. Bell in partial fulfillment of the requirement for the masters of counseling degree at Arizona State University. 相似文献
275.
We examine methods for reducing respondent burden in evaluating alter–alter ties on a set of network structural measures. The data consist of two sets, each containing 45 alters from respondent free lists: the first contains 447 personal networks, and the second 554. Respondents evaluated the communication between 990 alter pairs. The methods were (1) dropping alters from the end of the free-list, (2) randomly dropping alters, (3) randomly dropping links, and (4) predicting ties based on transitivity. For some measures network structure is captured with samples of less than 20 alters; other measures are less consistent. Researchers should be aware of the need to sample a minimum number of alters to capture structural variation. 相似文献
276.
277.
In-depth semi-structured interviews with 30 parents of children living with relatives in informal kinship care arrangements revealed the parents' views of the reasons for the informal kinship care arrangements, quality of their relationships with the children and their caregivers, their current and future roles in their children's lives, feelings experienced when with and away from the children, positive and negative aspects of kinship care, future goals and dreams for their children, and their assessments of their own strengths and challenges. Results of these interviews suggest several implications for social work practice and research. 相似文献
278.
The sociolinguistic modelling of phonological variation and change is almost exclusively based on auditory and acoustic analyses of speech. One phenomenon which has proved elusive when considered in these ways is the variation in postvocalic /r/ in Scottish English. This study therefore shifts to speech production: we present a socioarticulatory study of variation of postvocalic /r/ in CVr (e.g. car) words, using a socially‐stratified ultrasound tongue imaging corpus of speech collected in eastern central Scotland in 2008. Our results show social stratification of /r/ at the articulatory level, with middle‐class speakers using bunched articulations, while working‐class speakers use greater proportions of tongue‐tip and tongue‐front raised variants. Unlike articulatory variation of /r/ in American English, the articulatory variants in our Scottish English corpus are both auditorily distinct from one another, and correlate with strong and weak ends of an auditory rhotic continuum, which also shows clear social stratification. 相似文献
279.
280.
Journal of Management and Governance - 相似文献