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   2612篇
  免费   168篇
  国内免费   1篇
管理学   179篇
民族学   16篇
人才学   1篇
人口学   232篇
丛书文集   17篇
理论方法论   439篇
综合类   33篇
社会学   1721篇
统计学   143篇
  2023年   29篇
  2022年   7篇
  2021年   19篇
  2020年   74篇
  2019年   79篇
  2018年   117篇
  2017年   156篇
  2016年   114篇
  2015年   83篇
  2014年   78篇
  2013年   481篇
  2012年   107篇
  2011年   120篇
  2010年   77篇
  2009年   71篇
  2008年   119篇
  2007年   104篇
  2006年   100篇
  2005年   82篇
  2004年   93篇
  2003年   76篇
  2002年   71篇
  2001年   53篇
  2000年   47篇
  1999年   31篇
  1998年   29篇
  1997年   25篇
  1996年   21篇
  1995年   24篇
  1994年   31篇
  1993年   31篇
  1992年   15篇
  1991年   17篇
  1990年   29篇
  1989年   15篇
  1988年   19篇
  1987年   12篇
  1986年   10篇
  1985年   11篇
  1984年   15篇
  1983年   17篇
  1982年   5篇
  1981年   14篇
  1980年   9篇
  1979年   4篇
  1978年   6篇
  1976年   7篇
  1975年   5篇
  1973年   3篇
  1971年   4篇
排序方式: 共有2781条查询结果,搜索用时 15 毫秒
21.
A sample of 16 women and men who accompanied their adopted children with severe developmental disabilities to a medical appointment at Henry Ford Hospital's Multidisciplinary Care Clinic during the one-year period beginning July 1, 1988 are described in the context of their parental role vis-a-vis these children. Results of the study are presented through use of a six-part organizational scheme: demographic and social traits of the parents and their adopted children, the adopted children in family context, life satisfactions of the parents, adoption motives, adoption satisfactions, and humanization of the children.  相似文献   
22.
The American diet has changed substantially over the last few decades. These changes provide a test for social theory and have substantial effects on the demand for various food products, thus impacting U.S. agriculture. In this paper a rapidly growing dietary choice—vegetarianism—is explored. Prevalence of various forms of vegetarianism is estimated in a representative sample of a suburban population and factors that influence choice of a vegetarian diet are examined. About 7 percent of the sample report they are vegetarians. The prevalence of vegetarianism is not influenced by age, gender, or education, but individuals holding traditional values are less likely to be vegetarian than others. There also is some evidence mat individuals holding altruistic values are more likely than others to be vegetarians.  相似文献   
23.
To inform local and regional decisions about protecting short-term and long-term quality of life, the Consortium for Atlantic Regional Assessment (CARA) provides data and tools (for the northeastern United States) that can help decision makers understand how outcomes of their decisions could be affected by potential changes in both climate and land use. On an interactive, user-friendly website, CARA has amassed data on climate (historical records and future projections for seven global climate models), land cover, and socioeconomic and environmental variables, along with tools to help decision makers tailor the data for their own decision types and locations. CARA Advisory Council stakeholders help identify what information and tools stakeholders would find most useful and how to present these; they also provide in-depth feedback for subregion case studies. General lessons include: (1) decision makers want detailed local projections for periods short enough to account for extreme events, in contrast to the broader spatial and temporal observations and projections that are available or consistent at a regional level; (2) stakeholders will not use such a website unless it is visually appealing and easy to find the information they want; (3) some stakeholders need background while others want to go immediately to data, and some want maps while others want text or tables. This article also compares what has been learned across case studies of Cape May County, New Jersey, Cape Cod, Massachusetts, and Hampton Roads, Virginia, relating specifically to sea-level rise. Lessons include: (1) groups can be affected differently by physical dangers compared with economic dangers; (2) decisions will differ according to decision makers' preferences about waiting and risk tolerance; (3) future scenarios and maps can help assess the impacts of dangers to emergency evacuation routes, homes, and infrastructure, and the natural environment; (4) residents' and decision makers' perceptions are affected by information about potential local impacts from global climate change.  相似文献   
24.
Marriage and fertility in the United States have become less firmly entwined as more women bear children without marrying and more couples with children divorce. Today a sizeable number of children are expected to spend a portion of their childhood in one-parent households. Despite the trends in illegitimacy and divorce, the actual effect of out-of-wedlock childbearing on the living arrangements of children has not been fully explicated. Using the National Survey of Family Growth Cycle III, this paper estimates the probability that children aged 0–13 in 1982 are living in two-parent households, controlling for their mothers' marital statuses at their births. We find that marital status at birth is an important predictor of household structure at later ages for both white and black populations; however, the childhood environment is actually quite elastic as women marry, divorce, remarry, and redivorce.  相似文献   
25.
Recent studies demonstrating a concentration dependence of elimination of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) suggest that previous estimates of exposure for occupationally exposed cohorts may have underestimated actual exposure, resulting in a potential overestimate of the carcinogenic potency of TCDD in humans based on the mortality data for these cohorts. Using a database on U.S. chemical manufacturing workers potentially exposed to TCDD compiled by the National Institute for Occupational Safety and Health (NIOSH), we evaluated the impact of using a concentration- and age-dependent elimination model (CADM) (Aylward et al., 2005) on estimates of serum lipid area under the curve (AUC) for the NIOSH cohort. These data were used previously by Steenland et al. (2001) in combination with a first-order elimination model with an 8.7-year half-life to estimate cumulative serum lipid concentration (equivalent to AUC) for these workers for use in cancer dose-response assessment. Serum lipid TCDD measurements taken in 1988 for a subset of the cohort were combined with the NIOSH job exposure matrix and work histories to estimate dose rates per unit of exposure score. We evaluated the effect of choices in regression model (regression on untransformed vs. ln-transformed data and inclusion of a nonzero regression intercept) as well as the impact of choices of elimination models and parameters on estimated AUCs for the cohort. Central estimates for dose rate parameters derived from the serum-sampled subcohort were applied with the elimination models to time-specific exposure scores for the entire cohort to generate AUC estimates for all cohort members. Use of the CADM resulted in improved model fits to the serum sampling data compared to the first-order models. Dose rates varied by a factor of 50 among different combinations of elimination model, parameter sets, and regression models. Use of a CADM results in increases of up to five-fold in AUC estimates for the more highly exposed members of the cohort compared to estimates obtained using the first-order model with 8.7-year half-life. This degree of variation in the AUC estimates for this cohort would affect substantially the cancer potency estimates derived from the mortality data from this cohort. Such variability and uncertainty in the reconstructed serum lipid AUC estimates for this cohort, depending on elimination model, parameter set, and regression model, have not been described previously and are critical components in evaluating the dose-response data from the occupationally exposed populations.  相似文献   
26.
Personality theory and clinical social work practice   总被引:1,自引:0,他引:1  
This paper investigates the relevance of personality theories for clinical social work practice. Writings in comparative personality theory and the epistemology of clinical psychology and social work are sources. Clinical action, the time with a client, and clinical reflection, the thinking about or presenting of the client, are seen as importantly different moments in practice. Clinical action is characterized by humanistic, narrative forms of thought more than scientific, paradigmatic ones. Formal theory informs action indirectly through its shaping of the clinician's philosophy, attention, and priorities. Clinical reflection is shaped more directly by formal theories and benefits from the holding of multiple theories.  相似文献   
27.
Young adults entering the job market are finding that, despite strong corporate profits, economic growth is not trickling down to worker earnings, and federal policies are moving from the notion of entitlement to one of blame (Uchitelle, 1996, Sec. 4, p. 1). Adolescence is becoming increasingly confusing, since for many Americans economic opportunity is more fantasy than reality. This article highlights the declining opportunity for young adults and points out the limitations of existing adult developmental theory, both of which call for altered treatment conceptualizations that include the clinician operating as an anthropologist and utilizing the concepts of relationship-differentiation and response/ability from Stone Center writings.  相似文献   
28.
29.
European food retailers have increased their scale and scope while concentrating sales into large stores. Strategic implications include the need for scale to compete and organisational relationships to move from supply push to demand pull retailing. Consequences are different for private label and for branded manufacturers, who must respond to the demands of retail supply chains whilst retaining control of product development. Further concentration in both sectors is likely. Consumers are more mobile, but more captive to the retailer in store. Public policy makers are challenged to find new measures of retail power and both allow for innovation and ensure equitable shopping opportunities.  相似文献   
30.
高技术产业在推动产业升级和创新驱动方面具有重要带动作用。以长江经济带11省市高技术产业为研究对象,运用空间杜宾模型,选取2006—2015年面板数据,研究创新要素集聚及其对高技术产业的空间溢出效应。研究表明:创新要素集聚的非均衡分布特征明显;除资本投入和劳动力投入外,创新要素集聚对高技术产业发展的促进作用最为显著;创新要素集聚在省域间的溢出效应大于省域内的溢出效应。  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