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   8490篇
  免费   233篇
管理学   1168篇
民族学   34篇
人才学   1篇
人口学   791篇
丛书文集   33篇
理论方法论   773篇
综合类   291篇
社会学   3710篇
统计学   1922篇
  2023年   45篇
  2021年   55篇
  2020年   111篇
  2019年   163篇
  2018年   185篇
  2017年   269篇
  2016年   220篇
  2015年   166篇
  2014年   187篇
  2013年   1509篇
  2012年   323篇
  2011年   239篇
  2010年   188篇
  2009年   169篇
  2008年   204篇
  2007年   195篇
  2006年   149篇
  2005年   211篇
  2004年   184篇
  2003年   223篇
  2002年   238篇
  2001年   235篇
  2000年   206篇
  1999年   203篇
  1998年   155篇
  1997年   123篇
  1996年   143篇
  1995年   117篇
  1994年   114篇
  1993年   117篇
  1992年   140篇
  1991年   127篇
  1990年   115篇
  1989年   108篇
  1988年   112篇
  1987年   116篇
  1986年   109篇
  1985年   127篇
  1984年   103篇
  1983年   106篇
  1982年   76篇
  1981年   77篇
  1980年   73篇
  1979年   76篇
  1978年   79篇
  1977年   56篇
  1976年   45篇
  1975年   61篇
  1974年   50篇
  1973年   43篇
排序方式: 共有8723条查询结果,搜索用时 593 毫秒
961.
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   
962.
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   
963.
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   
964.
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   
965.
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   
966.
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   
967.
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   
968.
浅议我国木材国际贸易的比较优势   总被引:1,自引:1,他引:0  
在世贸组织体制下 ,我国木材国际贸易的环境将发生重大变化。木材国际贸易对缓解我国森林资源紧张矛盾 ,促进木材产业适应国际竞争要求 ,提高产业竞争力具有重要意义。我国木材产业在我国产业体系中处于相对落后位置 ,但不等于其产品完全没有国际贸易的比较优势。该文主要通过对我国木材产业部分产品贸易比较优势的分析 ,说明我国木材产业部分产品参与国际竞争的可能性和现实性。同时 ,提出我国保持现有产品比较优势和培育新的产品比较优势的战略立足点  相似文献   
969.
P M Hess  G Folaron 《Child welfare》1991,70(4):403-424
A key to determining a permanent plan for children in placement lies in determining and working with the history and relative intensity of parental ambivalence in the parent-child relationship as it is acted out in the placement experience. A study of cases in a public department disclosed not only indicators of parental ambivalence but also the reinforcement of that ambivalence by agency policy, working conditions, and lack of resources.  相似文献   
970.
The Gibbs sampler has been proposed as a general method for Bayesian calculation in Gelfand and Smith (1990). However, the predominance of experience to date resides in applications assuming conjugacy where implementation is reasonably straightforward. This paper describes a tailored approximate rejection method approach for implementation of the Gibbs sampler when nonconjugate structure is present. Several challenging applications are presented for illustration.  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