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   8266篇
  免费   221篇
管理学   1187篇
民族学   35篇
人才学   2篇
人口学   747篇
丛书文集   34篇
理论方法论   757篇
综合类   286篇
社会学   3594篇
统计学   1845篇
  2023年   42篇
  2021年   56篇
  2020年   104篇
  2019年   144篇
  2018年   182篇
  2017年   263篇
  2016年   213篇
  2015年   159篇
  2014年   188篇
  2013年   1426篇
  2012年   307篇
  2011年   227篇
  2010年   196篇
  2009年   172篇
  2008年   202篇
  2007年   198篇
  2006年   152篇
  2005年   219篇
  2004年   186篇
  2003年   226篇
  2002年   240篇
  2001年   227篇
  2000年   199篇
  1999年   194篇
  1998年   147篇
  1997年   118篇
  1996年   131篇
  1995年   109篇
  1994年   100篇
  1993年   106篇
  1992年   131篇
  1991年   120篇
  1990年   117篇
  1989年   103篇
  1988年   111篇
  1987年   114篇
  1986年   104篇
  1985年   123篇
  1984年   99篇
  1983年   111篇
  1982年   79篇
  1981年   79篇
  1980年   73篇
  1979年   77篇
  1978年   78篇
  1977年   56篇
  1976年   46篇
  1975年   60篇
  1974年   50篇
  1973年   42篇
排序方式: 共有8487条查询结果,搜索用时 31 毫秒
941.
森林认证的三大基础活动   总被引:5,自引:3,他引:2  
该文首次提出制定森林可持续经营的标准和指标、绿色消费运动、标准化及其认证是森林认证的三大基础活动。指出森林可持续经营标准和指标的实施及认证产品市场的形成是森林认证的内部动力和外在驱动 ,国际标准化及认证行动为森林认证的开展提供了丰富的经验。  相似文献   
942.
This paper explores the issues inherent in defining contracts for service delivery between the state and charitable organisations, and in differentiating them from grants. It begins by making the point that there is no one correct definition of a contract; rather, it is a function of its purpose. It then details our work in developing a definition of a contract within the national accounting tradition, as part of a study of the contribution of charitable organisations to the GDP of the United Kingdom. The paper ends by drawing some general conclusions from this experience.  相似文献   
943.
This study proves once again that too many press releases are poorly written and over-written, with long sentences and paragraphs, and poor syntax as well as weak and passive construction. In their use of press releases, journalists almost always have to make them simpler, shorter, easier to read, and less passive.The authors conclude that success in writing of press releases requires brevity and simplicity, shorter paragraphs, sentences, and words, and the elimination of the passive voice.Timothy Walters is an assistant professor of communication at Stephen F. Austin State University in Nacogdoches, TX. Lynne Walters is associate professor of journalism and Douglas Starr professor of journalism, both at Texas A&M University, College Station. Lynne Walters is currently a Fulbright professor at the American Journalism Center in Budapest, where her husband Timothy is also on a one-year appointment as a visiting professor.  相似文献   
944.
Couple and therapist perspectives about the use and process of reflecting team practice were analyzed using ethnographic research. A domain analysis was performed on postession interviews from both couples and therapists, and on field notes from each therapist. Seven couples and five therapists were interviewed at least twice over a 4-month period concerning their reactions to and perceptions of reflecting team practice. Six domains concerning reflecting team practice emerged from the analysis: (a)benefits of its use, (b) effects of gender, (c)recommended use, (d) contraindicated use, (e) the importance of creating spatial separateness between couple and team members, and (f) sequences of communication between the couple and team members that elicit change. The latter two domains described the process of reflecting team practice (i.e., steps in how it is used and how it is implemented). The role of ethnog rahy in reflecting team practice and in family therapy research is discussed.  相似文献   
945.
This paper is concerned with the technique of numerically evaluating the cumulative distribution function of a quadratic form in normal variables. The efficiency of two new truncation bounds and all existing truncation bounds are investigated. We also find that the suggestion in the literature for further splitting truncation errors might reduce computational efficiency, and the optimum splitting rate could be different in different situations. A practical solution is provided. The paper also discusses a modified secant algorithm for finding the critical value of the distribution at any given significance level.  相似文献   
946.
This paper introduces continuous‐time random processes whose spectral density is unbounded at some non‐zero frequencies. The discretized versions of these processes have asymptotic properties similar to those of discrete‐time Gegenbauer processes. The paper presents some properties of the covariance function and spectral density as well as a theory of statistical estimation of the mean and covariance function of such processes. Some directions for further generalizations of the results are indicated.  相似文献   
947.
Annual radiation doses and risks to the public living near, and traveling on, public highways, and occupational doses are calculated for highway shipments of radioactive materials under accident-free and incident-free conditions (i.e., under normal transportation conditions). The database developed by Sandia National Laboratories is used, and calculations are made using RADTRAN 4.0. This report is one of two reports estimating radiological risk associated with transportation of radioactive materials.  相似文献   
948.
An exact conditional test is developed for testing the absence of an edge in a graphical covariance selection model and is shown to be equivalent to a test based on the partial correlation coefficient. An example is given.  相似文献   
949.
This qualitative cirtical incident study examines the reactions and coping strategies of prolific family therapy scholars to difficult journal article rejections. Participants provide suggestions for ways to increase the likelihood of publication and to decrease the negative effects of journal article rejection. We discuss the implications of this investigations for the socialization of young professionals, the improvement of the journal review process, and the study of professional issues in family therapy.  相似文献   
950.
REVIEWS     
Proffessional Books:-Walter, J. L., & Peller, J. E. (1992). Becoming solution-focused in brief therapy.
Proffessional Books:-Nelson, T. S., & trepper, T. S. (Eds.). (1993). 101 interventions in family therapy .
Proffessional Books:-Imber-Black, E. (Ed.). (1993). Secrets in families and family therapy .
Proffessional Books:-Hanks, R. S., Matocha, L., & Sussman, M. B. (Eds.). (1992). Publishing in journals on the family .
Proffessional Books:-Shapiro, C. H. (1993). When part of the self is lost: Helping clients heal after sexual and reproductive losses .
Self-Help Books:-Smith, S. L. (1993). Making peace with your adult children: A guide to family healing .
Self-Help Books:-Gilbert, R. M. (1992). Extraordinary relationships: A new way of thinking about human interactions .
Audio And Videotapereviews:- Working with Couples in Conflict . (1992). (Audiotape of a workshop of a workshop by Susan M. Heitler).
Audio And Videotape Reviews:- Couples and Communication (1992). (Videotape for teaching communication skills to couples).  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