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   994篇
  免费   43篇
  国内免费   12篇
管理学   345篇
劳动科学   1篇
民族学   4篇
人口学   12篇
丛书文集   45篇
理论方法论   49篇
综合类   382篇
社会学   129篇
统计学   82篇
  2024年   1篇
  2023年   2篇
  2022年   9篇
  2021年   8篇
  2020年   26篇
  2019年   22篇
  2018年   20篇
  2017年   38篇
  2016年   45篇
  2015年   32篇
  2014年   41篇
  2013年   153篇
  2012年   48篇
  2011年   55篇
  2010年   40篇
  2009年   46篇
  2008年   49篇
  2007年   68篇
  2006年   48篇
  2005年   46篇
  2004年   37篇
  2003年   42篇
  2002年   28篇
  2001年   30篇
  2000年   22篇
  1999年   13篇
  1998年   19篇
  1997年   13篇
  1996年   12篇
  1995年   12篇
  1994年   2篇
  1993年   5篇
  1992年   2篇
  1991年   2篇
  1990年   2篇
  1989年   4篇
  1988年   4篇
  1987年   1篇
  1986年   1篇
  1975年   1篇
排序方式: 共有1049条查询结果,搜索用时 703 毫秒
1.
Not only ETO (Engineering to Order), but even serial production industry should know how to deal with projects and their schedule: plant commissioning, shutdown, introducing new products and similar circumstances should be managed with adequate planning and resource allocation techniques to create a schedule useful in decision making during the execution. The current complex reality, with evolving technologies and fierce pressure to reach the market as soon as possible, pushes the project managers to use more advanced techniques than waterfall planning, such as agile or lean. It also requires them to take a holistic view and manage concurrent tasks in complex projects. The contributions of this paper are two: the proposal to control specific parallel groups of waterfall activities under uncertain environments, which can lead to iterations and reworks, as a single concurrent Activity Managed by Kanban Methods (AMKM). This activity can be subsequently embedded into traditional scheduling approaches as CPM-PERT. The second contribution is the feasibility of its application in industrial environments due to the affordability of simulation software. Two use cases are shown as evidence. It is not a disruptive proposal, but a kaizen action based on very mature technologies. Finally, it is suggested some improvements to be implemented in Project Management Software due to this ‘kaizen’ proposal.  相似文献   
2.
The authors use an ecological framework and grounded theoretical analysis to explore the circumstances in which working‐class and low‐income custodial African American fathers gain custody of their children, their transition from part‐time to full‐time parents, and the role of support networks in enhancing or inhibiting these men's parenting. Twenty‐four men from an impoverished Midwestern urban area participated in the study. The findings suggest that these men, and perhaps others sharing their demographic profiles, generally become parents by default and are often reluctant to take on a full‐time, single parenting role. Adaptation to the role seems to be enhanced by these men's use of extended kin support networks and shared living arrangements. However, low wages, a lack of sufficient assistance from public assistance programs, and informal custody arrangements often inhibit their fathering.  相似文献   
3.
介绍了高性能定点可重构DSP处理器的数据通路设计。该数据通路以功能强大的16位定点计算单元为基础,搭建起高速16位数据处理平台;并能以单指令流多数据流的方式灵活支持多维向量运算;通过重构的方法有效地支持了32位数据处理。  相似文献   
4.
基于GPS/GSM/GIS集成的动态车辆优化调度的研究   总被引:1,自引:0,他引:1  
目前,GPS(全球定位系统)、GSM(数字蜂窝移动通信系统)和GIS(地理信息系统)都是成熟的商业技术。运用这些技术,再结合Dijstra最短路和贪心算法,可合理实现单配送中心、非满载送货条件下的车辆优化调度,提高配送效率。  相似文献   
5.
《孟子》中的单音节形容词研究   总被引:1,自引:0,他引:1  
文章主要从量的角度对《孟子》中的单音节形容词的句法功能进行研究,通过与现代汉语形容词的特征比较,结果发现单音节形容词作谓语(不带宾语),单音节形容词作宾语,单音节形容词带宾语以及单音节形容词作定语是《孟子》中的单音节形容词的重要特征。  相似文献   
6.
This study examines housing quality among three groups of single-parent women: white, African-American, and Hispanic. Three indicators of housing quality—crowding, affordability, and satisfaction—are used to discover the extent to which these groups experience housing problems. This study also explores differences and similarities in the factors that precipitate problems in housing quality for these three groups of single parents. Findings suggest important differences and similarities in the nature of housing quality problems among white, African-American, and Hispanic single-parent women. The specified variables explained about 20% of the variance in crowding, housing affordability, and housing satisfaction. On measures of objective and subjective housing quality, white single mothers are better housed than their African-American or Hispanic counterparts. Hispanic single mothers have the largest housing cost burden and average more persons per household than the other groups. African-Americans are twice as likely as either group to live in low-quality housing and reported the lowest average satisfaction with their housing. Her research interests include housing and neighborhood assessment and women and public policy issues. She has recently published articles inUrban Affairs Quarterly andHousing and Society on housing and neighborhood assessment criteria among black urban households and the housing cost burden of various groups of female-headed households. She received her Ph.D. from Ohio State University. Her research interests include the housing adjustment behavior of women and public policy. She has recently completed her thesis on the role of noncustodial parents in determining the quality of life of their children. She is also the recipient of the Tessie Agan Award for research excellence from the American Association of Housing Educators for a paper titled “Unterstanding Constraints and Residential Satisfaction among Low-Income Single-Parent Families.”  相似文献   
7.
使用传统的判案理论系统分析了拉伦茨氏的方法论体系。指出,拉伦茨氏方法论的基础是欧洲传统“名判”逻辑,其设定目标乃个案公决。拉伦茨氏强调了法官“续造法”的权力。所续造的“法”不是条法,而是曾经自主运用诸条法的模式,它理应有“现行法”的拘束力。“条法库”的缺漏由审判员以法律运用技术补足。诸准则之不谐或与宪法条法的不谐需赖“法益衡量”调谐。分析结论是,拉伦茨氏片面突出法官的自主地位,其方法论在本质上是现代法治社会一种尚需调制的折衷系统。  相似文献   
8.
无线传感器网络中覆盖性问题的研究   总被引:1,自引:0,他引:1  
无线传感器网络由大量的具有低能量,短寿命并且不可靠的传感器节点组成,因此在设计无线传感器网络时一个主要的目标在于保证足够的覆盖率以及能量可靠性的前提下可以延长网络的寿命。本文介绍了几种减少能量消耗以延长网络寿命的节点调度方法,并比较了各种方法的优缺点,指出其应用环境和需要进一步研究的工作。最后在这几种算法的基础上提出了一种新的算法。  相似文献   
9.
以韩礼德和汤普森关于主位结构的理论为依据,分析维语各种语气结构中的主语和单项主位的关系,发现维语主语在多数情况下充当无标记性主位,主语和主位的重合在陈述句中最为明显。但是,维语主语有时也可以充当无标记性述位。  相似文献   
10.
Terrorist actions are aimed at maximizing harm (health, psychological, economical, and political) through the combined physical impacts of the act and fear. Immediate and effective response to a terrorist act is critical to limit human and environmental harm, effectively restore facility function, and maintain public confidence. Though there have been terrorist attacks in public facilities that we have learned from, overall our experiences in restoration of public facilities following a terrorist attack are limited. Restoration of public facilities following a release of a hazardous material is inherently far more complex than in industrial settings and has many unique technical, economic, social, and political challenges. For example, there may be a great need to quickly restore the facility to full operation and allow public access even though it was not designed for easy or rapid restoration, and critical information is needed for quantitative risk assessment and effective restoration must be anticipated to be incomplete and uncertain. Whereas present planning documents have substantial linearity in their organization, the “adaptive management” paradigm provides a constructive parallel paradigm for restoration of public facilities that anticipates and plans for uncertainty, inefficiencies, and stakeholder participation. Adaptive management grew out of the need to manage and restore natural resources in highly complex and changing environments with limited knowledge about causal relationships and responses to restoration actions. Similarities between natural resource management and restoration of a public facility after a terrorist attack suggest that integration of adaptive management principles explicitly into restoration processes will result in substantially enhanced and flexible responses necessary to meet the uncertainties of potential terrorist attacks.  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