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   213篇
  免费   6篇
管理学   32篇
民族学   1篇
人口学   22篇
理论方法论   16篇
综合类   4篇
社会学   108篇
统计学   36篇
  2022年   3篇
  2021年   5篇
  2019年   4篇
  2018年   8篇
  2017年   6篇
  2016年   3篇
  2015年   8篇
  2014年   5篇
  2013年   25篇
  2012年   10篇
  2011年   5篇
  2010年   12篇
  2009年   8篇
  2008年   3篇
  2007年   6篇
  2006年   5篇
  2005年   4篇
  2004年   11篇
  2003年   4篇
  2002年   9篇
  2001年   8篇
  2000年   3篇
  1999年   2篇
  1998年   3篇
  1997年   3篇
  1996年   4篇
  1995年   4篇
  1993年   1篇
  1991年   1篇
  1990年   1篇
  1989年   2篇
  1988年   1篇
  1986年   3篇
  1985年   1篇
  1984年   4篇
  1983年   4篇
  1982年   2篇
  1981年   2篇
  1980年   4篇
  1979年   3篇
  1978年   2篇
  1977年   2篇
  1976年   1篇
  1975年   1篇
  1974年   2篇
  1973年   1篇
  1972年   4篇
  1970年   2篇
  1969年   1篇
  1966年   2篇
排序方式: 共有219条查询结果,搜索用时 93 毫秒
81.
In the event of a terrorist attack or catastrophic release involving potential chemical and/or biological warfare agents, decisionmakers will need to make timely and informed choices about whether, or how, to respond. The objective of this article is to provide a decision framework to specify initial and follow-up actions, including possible decontamination, and to address long-term health and environmental issues. This decision framework consists of four phases, beginning with the identification of an incident and ending with verification that cleanup and remediation criteria have been met. The flowchart takes into account both differences and similarities among potential agents or toxins at key points in the decision-making process. Risk evaluation and communication of information to the public must be done throughout the process to ensure a successful effort.  相似文献   
82.
83.
Many studies have established that married people fare better than their never‐married counterparts in terms of psychological well‐being. It is still unclear, however, whether this advantage is due primarily to beneficial effects of marriage or to the selection of psychologically healthier individuals into marriage. This study employs data on young adults from both waves of the National Survey of Families and Households to test hypotheses based on both selection (N= 878) and relationship (N= 722) effects. Further, we differentiate union formation into cohabitation and marriage with and without prior cohabitation. Results indicate no evidence of selection of less depressed persons into either marriage or cohabitation, but a negative effect of entry into marriage on depression, particularly when marriage was not preceded by cohabitation.  相似文献   
84.
85.
Information on participation with kin, with friends, and in voluntary associations was used to test two competing hypothescs of the effects of social mobility on social relations. The dissociative hypothesis maintains that mobility leads to social isolation, while the socialization hypothesis predicts an adptive outcome to mobility. The relationship is more complex than either position would suggest. Social mobility is associated with isolation from kin and friends, but only for the upwardly mobile. The findings obtained with voluntary associations support the socialization hypothesis in that the level of membership of the socially mobile is intermediate between the two stable groups. Social mobility has maladaptive consequences for more intimate and personal social relations, but it is integrative as far as participation in voluntary associations is concerned.  相似文献   
86.
87.
Life tables used in life insurance determine the age of death distribution only at integer ages. Therefore, actuaries make fractional age assumptions to interpolate between integer age values when they have to value payments that are not restricted to integer ages. Traditional fractional age assumptions as well as the fractional independence assumption are easy to apply but result in a non-intuitive overall shape of the force of mortality. Other approaches proposed either require expensive optimization procedures or produce many discontinuities. We suggest a new, computationally inexpensive algorithm to select the parameters within the LFM-family introduced by Jones and Mereu (Insur Math Econ 27:261–276, 2000). In contrast to previously suggested methods, our algorithm enforces a monotone force of mortality between integer ages if the mortality rates are monotone and keeps the number of discontinuities small.  相似文献   
88.

Rezensionen

Alfred Ku?: „Marketing-Theorie: Eine Einführung“  相似文献   
89.
介绍了不同学者对马王堆3号汉墓"告地书"的释读,分析了马王堆3号汉墓"告地书"的相关问题.同时,借助不同墓地出土的"告地书"的文书格式、遣策和"告地书"的关系、"告地书"中的规范用语"敢言之"、"自言"等内容来归纳概述了"告地书"的特征.  相似文献   
90.
Most of us have encountered problems in developing an effective quantitative analysis program for our business schools in the United States. We have often found managers very reluctant to adopt QA techniques; on the other hand, students, although not reluctant, lacked the necessary mathematical background. During the academic year 1970–71, the authors assisted in the development of a QA department in the business school of a developing nation which offers both resident coursework for graduate students and executives seminars for businessmen. Both the students and the executives had the necessary mathematical background for rapid understanding of QA techniques. The executives appeared eager to use QA in their business operations and the students were highly motivated toward the application of QA to business problems. Our purpose in this article is not to convince all the QA professors to teach in underdeveloped nations, but to furnish information which is likely to be useful to those who attempt to establish similar QA programs in other developing countries.  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