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   3132篇
  免费   96篇
  国内免费   1篇
管理学   488篇
民族学   15篇
人才学   1篇
人口学   250篇
丛书文集   25篇
理论方法论   337篇
综合类   23篇
社会学   1687篇
统计学   403篇
  2023年   18篇
  2021年   12篇
  2020年   37篇
  2019年   54篇
  2018年   68篇
  2017年   78篇
  2016年   78篇
  2015年   52篇
  2014年   67篇
  2013年   524篇
  2012年   95篇
  2011年   84篇
  2010年   78篇
  2009年   83篇
  2008年   98篇
  2007年   100篇
  2006年   100篇
  2005年   103篇
  2004年   101篇
  2003年   102篇
  2002年   110篇
  2001年   61篇
  2000年   54篇
  1999年   65篇
  1998年   53篇
  1997年   64篇
  1996年   70篇
  1995年   41篇
  1994年   48篇
  1993年   47篇
  1992年   44篇
  1991年   48篇
  1990年   45篇
  1989年   37篇
  1988年   32篇
  1987年   33篇
  1986年   21篇
  1985年   25篇
  1984年   42篇
  1983年   39篇
  1982年   35篇
  1981年   46篇
  1980年   31篇
  1979年   24篇
  1978年   23篇
  1977年   30篇
  1976年   29篇
  1975年   17篇
  1974年   11篇
  1973年   21篇
排序方式: 共有3229条查询结果,搜索用时 78 毫秒
161.
Abstract Recent initiatives from state and federal government agencies have helped foster the formation of community‐based watershed organizations. Although there is a great deal of enthusiasm about the potential of these organizations to enhance water quality, relatively little attention has been paid to the impacts these organizations may have on the well‐being of rural communities more generally. Assessments of effectiveness have typically focused on specific activities and accomplishments, rather than a broader range of community‐based effects. In short, we ask whether community‐based environmental management improves community as well as environment. Our research utilized a mixed‐methods design, including a statewide mail survey of all Pennsylvania watershed organizations, followed by in‐depth interviews with 28 rural watershed organizations. This sequential approach progressively explored in more detail definitions of effectiveness, including the building of rural capacity. We find watershed organizations are potentially effective mechanisms for building local leadership, enhancing the skills of rural residents, and making valuable connections with other communities, facing similar water‐resource and rural‐development issues. However, the range of issues with which local watershed organizations engage and the methods they currently utilize may eventually limit their usefulness.  相似文献   
162.
Conservation projects are dynamic interventions that occur in complex contexts involving intricate interactions of social, political, economic, cultural, and environmental factors. These factors are constantly changing over time and space as managers learn more about the context within which they work. This complex context poses challenges for planning and evaluating conservation project. In order for conservation managers and evaluation professionals to design good interventions and measure project success, they simultaneously need to embrace and deconstruct contextual complexity.In this article, we describe conceptual models—a tool that helps articulate and make explicit assumptions about a project's context and what a project team hopes to achieve. We provide real-world examples of conceptual models, discuss the relationship between conceptual models and other evaluation tools, and describe various ways that conceptual models serve as a key planning and evaluation tool. These include, for example, that they document assumptions about a project site and they provide a basis for analyzing theories of change.It is impractical to believe that we can completely eliminate detail or dynamic complexity in projects. Nevertheless, conceptual models can help reduce the effects of this complexity by helping us understand it.  相似文献   
163.
Fundraising scholarship has focused on the application of public relations theory to the process particularly in exploring the predictive power in applying relationship management theory to the non-profit organization–donor relationship. However, people often are impacted by catastrophic events and want to donate to relief efforts even though they may not be connected to the region. A survey of two American Red Cross chapters’ donors revealed that individuals who contributed to the December 2004 tsunami relief efforts were more likely to experience feelings of cognitive dissonance than non-donors, and their donations resulted in a consonance restoration. These results support an argument for non-profits, particularly those in crisis response, to have an active crisis communication plan in place that deals not only with responding to the event but also having a proactive plan established to publicize how to donate to relief efforts. Highlighting the consonance restoration, non-profits should also discuss the positive aspects of donating to their efforts, such as the work being done for the disaster victims.  相似文献   
164.
We describe a natural field experiment investigating donation behaviour. The setting was an art gallery where donations could be deposited into a transparent box in the foyer. Two aspects of the donation environment were manipulated: signs on the donation box and the initial contents of the box. We used three sign treatments: a control with no sign, a sign that thanked donors, and a sign that indicated donations would be matched. We used two initial contents treatments: one with relatively little money ($50) and one with four times as much. The average donation per donor was significantly larger in the $200 treatments but this was offset by a decrease in the propensity to donate. In the matching treatments donations were significantly larger both at the per donor and per visitor level. A control variable turned out to have the largest influence on donation behaviour: the day of the week. The average donation per visitor was 51% higher on Sundays, when compared to every other day of the week.  相似文献   
165.
166.
167.
Diversification gains in mean-variance efficiency derived from including real estate in financial asset portfolios are examined. Optimal financial and mixed-asset portfolios were generated by selecting from an investment universe including several distinct financial and real estate media. Deficiencies of previous studies were overcome by employing data with improved representativeness and comparability. The efficient mixed-asset portfolios dominated the efficient financial asset portfolios implying that purely financial asset diversification is inefficient. The optimal mixed-asset portfolio prescribed that approximately two-thirds of the investment wealth be allocated to real estate and one-third to the financial media.  相似文献   
168.
Direct experiences, we find, influence environmental risk beliefs more than the indirect experiences derived from outcomes to others. This disparity could have a rational basis. Or it could be based on behavioral proclivities in accord with the well‐established availability heuristic or the vested‐interest heuristic, which we introduce in this article. Using original data from a large, nationally representative sample, this article examines the perception of, and responses to, morbidity risks from tap water. Direct experiences have a stronger and more consistent effect on different measures of risk belief. Direct experiences also boost the precautionary response of drinking bottled water and drinking filtered water, while indirect experiences do not. These results are consistent with the hypothesized neglect of indirect experiences in other risk contexts, such as climate change.  相似文献   
169.
One medical specialty classification system applicable for research and career counseling is the person‐oriented versus technique‐oriented taxonomy. Given that the model was conceptualized in the 1960s, verification based on how medical specialties are practiced and viewed today is necessary. Five specialists in medical career development and advising verified the categorization of specialties. Based on their review, 100% consensus was reached regarding grouping of specialties. This outcome validates the taxonomy of medical specialties and supports its continued use for medical career specialty advising and choice.  相似文献   
170.
Melvin Pollner was a teacher, scholar, and astute academician. He was also a seeker regarding the nature of humanity. As a seeker, he saw past the relative certainty demanded of academic publishing, a point reflected in his final deliberations published for the first time in this volume, where he interrogates Harold Garfinkel, ethnomethodology, and Formal Analysis.  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