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   5569篇
  免费   341篇
  国内免费   55篇
管理学   410篇
劳动科学   3篇
民族学   23篇
人才学   1篇
人口学   50篇
丛书文集   434篇
理论方法论   247篇
综合类   4042篇
社会学   531篇
统计学   224篇
  2024年   2篇
  2023年   38篇
  2022年   44篇
  2021年   73篇
  2020年   118篇
  2019年   123篇
  2018年   69篇
  2017年   139篇
  2016年   178篇
  2015年   202篇
  2014年   387篇
  2013年   467篇
  2012年   414篇
  2011年   475篇
  2010年   362篇
  2009年   343篇
  2008年   371篇
  2007年   381篇
  2006年   406篇
  2005年   314篇
  2004年   271篇
  2003年   233篇
  2002年   166篇
  2001年   138篇
  2000年   104篇
  1999年   43篇
  1998年   31篇
  1997年   21篇
  1996年   8篇
  1995年   14篇
  1994年   8篇
  1993年   6篇
  1992年   4篇
  1991年   4篇
  1990年   4篇
  1988年   2篇
  1987年   1篇
  1983年   1篇
排序方式: 共有5965条查询结果,搜索用时 4 毫秒
1.
Addressing the lack of physical activity (PA) in rural adults is vital because of the role it plays in the risk for many chronic diseases. The purpose of the study was to explore the feasibility of conducting a 12-week intervention utilizing a Fitbit to increase PA behavior in inactive rural adults recruited from a primary care clinic. Semi-structured interviews were conducted with study participants (n=10) and a focus group was held with nurses (n=7) from the primary care clinic. Data were analyzed using the process of immersion/crystallization. Participants and nurses both felt the program had a positive impact on PA and that the program was needed in the community. Study participants most often reported their favorite part of the study was being able to track their activity as well as the goal setting. However, study participants reported barriers to continued participation in PA related to a lack of time and ability to be active in cold weather. Further, nursing staff reported barriers in regard to a lack of resources (staffing and money) These barriers need to be examined further and addressed in order to implement a sustainable PA program that can be maintained through a primary care clinic.  相似文献   
2.
In realist evaluation, where researchers aim to make program theories explicit, they can encounter competing explanations as to how programs work. Managing explanatory tensions from different sources of evidence in multi-stakeholder projects can challenge external evaluators, especially when access to pertinent data, like client records, is mediated by program stakeholders. In this article, we consider two central questions: how can program stakeholder motives shape a realist evaluation project; and how might realist evaluators respond to stakeholders’ belief-motive explanations, including those about program effectiveness, based on factors such as supererogatory commitment or trying together in good faith? Drawing on our realist evaluation of a service reform initiative involving multiple agencies, we describe stakeholder motives at key phases, highlighting a need for tactics and skills that help to manage explanatory tensions. In conclusion, the relevance of stakeholders’ belief-motive explanations (‘we believe the program works’) in realist evaluation is clarified and discussed.  相似文献   
3.
Research shows that top‐down‐designed parenting programmes do not always meet the needs of postmigration parents. Bottom‐up programmes by migrant organizations hold a promise to fill this gap; however, research about these programmes and appropriate evaluation methodologies is scarce. Drawing upon Wenger's ( 2010 ) “communities of practice,” this paper explores an alternative perspective on parenting programme evaluation. Findings are presented from a study looking into social learning processes of postmigration parents who participated in a bottom‐up programme about raising teenagers in urban areas. Using an ethnographically inspired method combined with a preprogramme and postprogramme design, 115 Moroccan‐Dutch mothers and fathers from 15 programme groups participated. Results show that the programme provided a social learning space in which parents used themselves as resources to learn collectively about parenting. Moreover, parents consciously engaged in learning interactions across learning spaces stretched into their social networks. These analyses showed how parents' development of “learning citizenship” (Wenger, 2009 ) provides us with insight in collective learning dimensions present in a bottom‐up parenting programme, which is often not included in evaluation studies. Implications for practitioners as facilitators of parents' collective learning are presented.  相似文献   
4.
为了对多个多属性(指标)待评价对象(方案)在多个时间点的发展状态和该时间段内的总体发展水平进行比较分析,根据理想解法和灰关联度法优缺点,提出基于理想解和灰关联度的动态评价方法。该方法基于三维数据,将欧氏距离和灰色关联度相结合,提出一种新贴近度,同时反映了位置关系和数据曲线的相似性差异,兼顾评价指标值差异程度和增长程度。最后将该方法应用于"十二五"期间省域循环经济生态效益评价,通过实例验证该方法实际应用上的有效性。  相似文献   
5.
作为被广泛使用的社交媒体,微信已经成为热点事件和网络舆情的重要策源地,科学准确评估微信公众号的影响力对于明晰微信信息传播特点,深入挖掘微信传播潜力,进一步规范和指导微信平台的传播行为具有较大的理论和实践意义。在对既有关于微信公众号影响力研究进行梳理和评价的基础上,基于传播效果测量的设计,坚持以受众为中心、由浅入深多层次考察准则,运用德尔菲法和层次分析法建构一套微信公众号影响力指标体系。该指标体系由4个一级指标和9个二级指标构成,并运用线性合成法合成微信公众号影响力指数。  相似文献   
6.
Portfolio evaluation is the evaluation of multiple projects with a common purpose. While logic models have been used in many ways to support evaluation, and data visualization has been used widely to present and communicate evaluation findings, adopting logic models for portfolio evaluation and using data visualization to share findings simultaneously is surprisingly limited in the literature. With the data from a sample portfolio of 209 projects which aims to improve the system of early care and education (ECE), this study illustrated how to use logic model and data visualization techniques to conduct a portfolio evaluation by answering two evaluation questions: “To what extent are the elements of a logic model (strategies, sub-strategies, activities, outcomes, and impacts) reflected in the sample portfolio?” and “Which dominant paths through the logic model were illuminated by the data visualization technique?” For the first question, the visualization technique illuminated several dominant strategies, sub-strategies, activities, and outcomes. For the second question, our visualization techniques made it convenient to identify critical paths through the logic model. Implications for both program evaluation and program planning were discussed.  相似文献   
7.
通过对抗性设计方法解决项目评审中的社会伦理问题,为专家、申请者、大众提供争论和表达异议的民主环境。项目自动评价平台完成民主环境的构建,呈现专家、申请者、平台的争胜性关系,揭示霸权,旨在重塑自由、平等、公平、正义、特权等的项目评审中的社会伦理。  相似文献   
8.
重大基础设施项目具有战略性、集成性、复杂性等特征,项目容易受到多种风险因素的综合影响,导致项目目标的偏离。现有风险评估与风险决策的方法缺乏对于风险因素、风险事件之间关联的分析。为了实现重大基础设施建设项目综合系统的风险评估,本文采用元网络分析方法,构建项目目标、风险事件和风险因素的交互模型,揭示重大基础设施风险事件发生机制的黑箱过程。风险评估过程中,通过多个网络叠加运算分析每个风险因素对于各种风险事件以及项目各目标的影响情况,改进了以往仅对风险因素单一影响程度的风险评估方法。同时,本研究选择我国某河流水电站过坝运输项目方案比选的风险评估过程验证方法的适用性。  相似文献   
9.
Using agriculture to improve nutrition is an approach growing in popularity, with programs becoming increasingly complex and multisectoral. While there is an active line of research assessing the impacts of such programs, little has been written about the process of successfully implementing them. As such, this paper uses a multisectoral nutrition-sensitive agriculture program implemented in four African countries as a case study to address key challenges in and lessons learned from implementation. We highlight the overall flexibility of nutrition-sensitive agriculture but also the need to adapt certain aspects to the particular context, as well as the opportunities for cross-context learning (and the limits to this). Integrating rigorous evaluation into such complex programs and forging diverse cross-sectoral partnerships offer both rewards and challenges, upon which we reflect. Main lessons learned from the program include the importance of carefully sequencing interventions, retaining flexibility in implementation, allowing for considerable time for cross-sector integration and coordination, and considering community impacts when designing research.  相似文献   
10.
This research proposes a multi-criteria decision-making (MCDM) framework and demonstrates the impact of competitive conditions on supplier evaluation process for construction supply chains. The paper focuses on the supply chain of a large-scale housing project in order to illustrate the role of competitive capability and suppliers’ profile and its influence on supplier evaluation based on prevailing supply/market conditions. Various scenarios are investigated to demonstrate the impact of competition on supplier evaluation. The contribution of the study lies in highlighting the impact of supply/market conditions on MCDM decisions causing supplier evaluation ‘imbalance’ and MCDM usage. It is expected that the study will be useful for project management, construction, supply chain management, sourcing professionals. The findings of the study are generalisable to projects-based situations such as petroleum refinery and ship building where bill of materials typically consists of thousands of items and a large number of suppliers are involved.  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