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   91902篇
  免费   1987篇
  国内免费   18篇
管理学   12378篇
民族学   554篇
人才学   25篇
人口学   6916篇
丛书文集   605篇
理论方法论   9467篇
综合类   2683篇
社会学   42471篇
统计学   18808篇
  2023年   510篇
  2021年   575篇
  2020年   1522篇
  2019年   2202篇
  2018年   2084篇
  2017年   3170篇
  2016年   2378篇
  2015年   2059篇
  2014年   2645篇
  2013年   18919篇
  2012年   2453篇
  2011年   2260篇
  2010年   2062篇
  2009年   2247篇
  2008年   2148篇
  2007年   1976篇
  2006年   2191篇
  2005年   2361篇
  2004年   2179篇
  2003年   1888篇
  2002年   2007篇
  2001年   1998篇
  2000年   1770篇
  1999年   1682篇
  1998年   1495篇
  1997年   1331篇
  1996年   1289篇
  1995年   1321篇
  1994年   1291篇
  1993年   1272篇
  1992年   1260篇
  1991年   1199篇
  1990年   1175篇
  1989年   1025篇
  1988年   1123篇
  1987年   990篇
  1986年   892篇
  1985年   1069篇
  1984年   1124篇
  1983年   1007篇
  1982年   939篇
  1981年   866篇
  1980年   801篇
  1979年   865篇
  1978年   760篇
  1977年   685篇
  1976年   650篇
  1975年   633篇
  1974年   525篇
  1973年   433篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
Model building in physical, statistical, simulation or other form, is making an increasing contribution to the problem solving methodology in economics, industry, government, and technological development (1). More specifically, in the present context, simulation models can offer a distinctive and valuable contribution to the understanding by management of complex business systems, interactions and environment and indicate ways toward improvement, financial and otherwise (2). The advent of powerful computers in the last few years is the decisive factor which has decided the means of realizing the full potential of simulation models, hitherto unattainable because of the vast amount of data processing and calculation required. The purpose of this article is to indicate the approach to and scope of a computerized simulation model for long term production strategy decision making (3). While the model relates to the system and data of a specific production unit, manufacturing electronic components, the principles are widely applicable in any size and type of company. It is not a specifically large company technique.  相似文献   
962.
New Products are the life blood of a growing company, but traditional methods of introducing new products are no longer adequate. Du Pont is using a new approach called Venture Management. A New Venture Development provides an ideal environment for making and carrying out decisions involved in introducing new technological developments. It combines the advantages in mobility and communications enjoyed by a small venture-orientated company with the strong technical and financial advantages of a large company.  相似文献   
963.
964.
965.
A survey of corporate Planning in Britain suggests that the way the process is organized varies with the need of the firm. There appear to be two types of needs which foster the development of the planning activity—strategy development and co-ordination. In capital intensive companies, threatened by technological or market change, there is a need for reappraisal of the firm's overall strategy. On the other hand, in a large diversified firm the requirement may be to co-ordinate the plans of different divisions and departments, particularly investment proposals. This article suggests a framework for the analysis of these planning needs.  相似文献   
966.
967.
968.
969.
970.
This study explores differences in inter-household exchange of goods and services in Anglo- and Mexican-American families controlling for income level and for ethnicity. The extent of such exchange, its perceived importance to the family's quality of life, satisfaction with the exchange, and the relation of persons in the exchange process are examined. Significant differences are found more often between higher income Anglo- and Mexican-Americans than between low-income families, both in the family providing goods and services for others and in the receipt of them. Higher income Mexican-American families are more likely than their Anglo- counterparts to exchange with relatives. Ethnic effects are more prevalent in higher income households than in low-income households. Economic effects are more predominant than ethnic effects.This study contributes to interregional Agricultural Experiment Station Research Project NC-128, Quality of Life as Influenced by Area of Residence. Cooperating states: Arizona, California, Colorado, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, Nevada, Ohio, Texas.Flora L. Williams' current research interests include income adequacy, financial problems, and indicators of change in economic well-being. She is an Associate Professor, Consumer Sciences and Retailing, Purdue University, West Lafayette, IN 47907.  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