全文获取类型
收费全文 | 912篇 |
免费 | 28篇 |
专业分类
管理学 | 114篇 |
民族学 | 10篇 |
人口学 | 78篇 |
丛书文集 | 4篇 |
理论方法论 | 90篇 |
综合类 | 5篇 |
社会学 | 548篇 |
统计学 | 91篇 |
出版年
2023年 | 5篇 |
2022年 | 3篇 |
2020年 | 22篇 |
2019年 | 34篇 |
2018年 | 29篇 |
2017年 | 40篇 |
2016年 | 37篇 |
2015年 | 22篇 |
2014年 | 24篇 |
2013年 | 142篇 |
2012年 | 39篇 |
2011年 | 39篇 |
2010年 | 25篇 |
2009年 | 29篇 |
2008年 | 40篇 |
2007年 | 26篇 |
2006年 | 27篇 |
2005年 | 29篇 |
2004年 | 32篇 |
2003年 | 23篇 |
2002年 | 22篇 |
2001年 | 23篇 |
2000年 | 13篇 |
1999年 | 23篇 |
1998年 | 16篇 |
1997年 | 14篇 |
1996年 | 13篇 |
1995年 | 14篇 |
1994年 | 6篇 |
1993年 | 7篇 |
1992年 | 11篇 |
1991年 | 11篇 |
1990年 | 6篇 |
1989年 | 5篇 |
1988年 | 6篇 |
1987年 | 5篇 |
1986年 | 6篇 |
1985年 | 9篇 |
1984年 | 10篇 |
1983年 | 4篇 |
1982年 | 4篇 |
1981年 | 7篇 |
1979年 | 4篇 |
1977年 | 5篇 |
1976年 | 4篇 |
1975年 | 5篇 |
1974年 | 2篇 |
1973年 | 5篇 |
1972年 | 4篇 |
1970年 | 2篇 |
排序方式: 共有940条查询结果,搜索用时 0 毫秒
101.
Typically in the United States only one contractor (the developer or first producer) makes a weapon system because it is too expensive or for some other reason infeasible to develop a second source. Congress and higher headquarters are constantly challenging the Armed Services to add other sources who can competitively make their systems. This paper describes a method of analyzing this complex problem which often has very large monetary and other significant impacts. Procedures and a case study are presented which consider cost and other criteria which might be used to make the second source decision. 相似文献
102.
The legitimacy of government-sponsored gambling and its continued expansion depends in part on the impact that gambling has on society and the extent to which gambling revenue is derived from vulnerable individuals. The purpose of the present article is to try to establish a valid estimate of the proportion of gaming revenue derived from problem gamblers in Canada. Using recent secondary data collected in eight Canadian provinces, we estimate this proportion to be 23.1%, compared to a problem gambling prevalence rate of 4.2%. This estimate must be seen as tentative, however, as self-reported expenditures are 2.1 times higher than actual provincial gaming revenues. 相似文献
103.
104.
105.
106.
Engaged couples who took a premarital inventory called FOCCUS were contacted 5 years later to see if their scores would predict their future marital success. Results showed that FOCCUS successfully predicted the future marital success of most couples, supporting the predictive validity of FOCCUS. The results also indicate that FOCCUS and PREPARE are roughly comparable in terms of their predictive validity. 相似文献
107.
108.
M. K. Williams 《Journal of applied statistics》1988,15(3):325-333
There is a growing movement towards the construction of statistical expert systems by statisticians to assist incertain aspects of their work. As one of the most'abused’ areas, experimental design could benefit from a system ofthis type. This paperoutlines some ideas on how a system for intelligently constructing designs could be built. 相似文献
109.
Arthur R. Williams 《Journal of marital and family therapy》1975,1(3):277-280
This irreverent, somewhat breezy paper describes the experience of the author in establishing a private practice in an unusual setting and offers some observations for others. Editor. 相似文献
110.