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   4512篇
  免费   164篇
  国内免费   64篇
管理学   361篇
劳动科学   2篇
民族学   80篇
人才学   1篇
人口学   84篇
丛书文集   557篇
理论方法论   194篇
综合类   3218篇
社会学   86篇
统计学   157篇
  2024年   4篇
  2023年   15篇
  2022年   52篇
  2021年   77篇
  2020年   49篇
  2019年   45篇
  2018年   55篇
  2017年   66篇
  2016年   64篇
  2015年   99篇
  2014年   170篇
  2013年   233篇
  2012年   250篇
  2011年   302篇
  2010年   305篇
  2009年   346篇
  2008年   337篇
  2007年   352篇
  2006年   372篇
  2005年   300篇
  2004年   244篇
  2003年   227篇
  2002年   275篇
  2001年   232篇
  2000年   134篇
  1999年   49篇
  1998年   13篇
  1997年   11篇
  1996年   16篇
  1995年   11篇
  1994年   14篇
  1993年   5篇
  1992年   5篇
  1991年   1篇
  1990年   3篇
  1989年   2篇
  1988年   1篇
  1987年   1篇
  1986年   2篇
  1984年   1篇
排序方式: 共有4740条查询结果,搜索用时 171 毫秒
91.
采用标准化和模块化设计的小型核反应堆在安全性和经济性方面的优势,将扩大核能在新兴工业国家和发展中国家的市场,有望成为我国核电设备出口的重要组成部分。文章描述了小型核反应堆的发展现状,分析了小型核反应堆的优势、应用前景及推广应用可能面临的问题,提出了在我国开展小型反应堆研究和应用的建议和策略。  相似文献   
92.
笔者采用锡尔指数及其一阶模型,对安徽省学前教育中的经费投入、师资力量、办学规模等教育资源配置的差异进行了测度,并将教育资源配置的差异性分解为皖北、皖中、皖南三个地域间的差异以及三个地域内各地区之间的差异。研究发现:三个地域内各地区差异是造成全省学前教育资源配置差异的主要原因;学前教育经费投入、师资力量和办学规模都存在着不同程度的配置差异,其中财政性教育公用费各地区差异最明显,专任教师的缺乏造成了各地区师资力量资源配置的差异;办学规模已基本能满足全省幼儿入园的需要,但结构性矛盾仍然突出。  相似文献   
93.
我国法律明确规定班主任有权采取适当方式批评教育学生,但对何谓适度并未作出清晰界定。因此,班主任批评教育学生时容易将惩戒越界为体罚,同时,因为缺乏评价标准,涉及惩罚学生的事件往往成为舆论热点。2014年底,湖南省娄底卫校某班主任因惩罚学生而引发的“嗑瓜子事件”,迅速成为网络热点,再次证明了规制教师教育惩戒权的必要性。应在坚持反对体罚的前提下,厘定“教育惩戒”与“变相体罚”两个概念的关系,并对教育惩戒权行使作详细规定。  相似文献   
94.
为解决现阶段燃气无线抄表系统数据采集中无线网络不稳定、路由协议复杂、自修复能力薄弱等问题,提出并设计了一种基于cc1101无线传送模块的树形拓扑结构无线自组网系统。系统中主要对数据采集层路由协议和硬件实现进行了研究和设计,分析了该燃气无线抄表系统与传统燃气无线抄表系统的不同之处,设计了该系统数据采集层网络传输协议和总体结构。无线节点建在穿透力强的433 MHz的频率下进行通信,保证了系统自组网的稳定快速。  相似文献   
95.
The Chinese road has deep historical roots. Its most striking feature is that it is marked by historical continuity rather than rupture, and the main force behind this continuity is its intrinsic dynamism and vitality. Unlike the paradigm of Eurocentrism or “Discovering History in China,” the comparative analytical paradigm discovers China through long-term comparisons with corresponding countries in the same time and space in an effort to find positive elements in the history of the Chinese road and to refute the long prevalent theory of Chinese stagnation. Seen over the course of world history, the impetus for the creation of the world’s most brilliant agrarian civilization was endogenous. This impetus was not a momentary “explosive force” but a sustainable institutional drive whose main constituents were the independent farming household, endogenous government capacity and adaptive national governance. In addition to the main theme of “permanent change,” Chinese development had a secondary theme of “cyclical change” which cannot be ignored. The roots of Chinese development are buried deep in the genes of this agrarian nation in the form of sticky institutions, bureaucratic inertia, arbitrary power, etc. Historical continuity provided a foundation for China’s creative revolution and development in modern times, ultimately laying down a socialist development road with Chinese characteristics, although this remains an unfinished relay process.  相似文献   
96.
Natural catastrophes such as earthquakes can, in addition to causing loss of life, disrupt the urbanization process through the need for forced population redistribution and the modification of resource and environmental carrying capacity. The population carrying capacity (PCC) of an altered environment following an earthquake is a crucial determinant in the relocation of displaced persons. We use data adaptive methods to model the correlation between the physical environment and human population density in estimating PCC in areas affected by the 2008 Wenchuan earthquake. Comparing actual population distributions with ideal population distributions allows for the identification of villages where population exceeds PCC, or conversely, areas where the environment can support a higher population. Such a comparison can provide the basis for a relocation plan, a critical element of post-catastrophe policy-making.  相似文献   
97.
敏捷开发是软件项目的一个概念框架,能够帮助开发团队快速响应需求的变化并且能够很好地控制成本和风险。它是一种以人为核心、迭代、循序渐进的开发方法。Serum是一个应用广泛的迭代增量过程进行软件开发的敏捷开发方法。在全球化的背景下,存在很多全球化的开发团队,他们在不断探索全球化敏捷开发的模式。文章最后给出的HP的全球化团队敏捷开发模式,能够帮助大家更好地认识敏捷开发。  相似文献   
98.
杨勇  冯霞 《太平洋学报》2012,20(3):30-38
本文根据中国—东盟区域合作发展的政治合作机制的概念及呈现的多维特性,运用政治合作的目标分解和构成要素,对政治合作机制进行综合的结构分析。通过利益泛化(低度)、制度分化(中度)和价值固化(深度)生成的三个阶段性使命目标(和睦共享、和平共处与和谐共荣)合作过程的剖析,对中国—东盟政治合作机制建设的结构性问题进行探讨,以此助推区域政治合作机制的改进和优化。  相似文献   
99.
In analyzing data from unreplicated factorial designs, the half-normal probability plot is commonly used to screen for the ‘vital few’ effects. Recently, many formal methods have been proposed to overcome the subjectivity of this plot. Lawson (1998) (hereafter denoted as LGB) suggested a hybrid method based on the half-normal probability plot, which is a blend of Lenth (1989) and Loh (1992) method. The method consists of fitting a simple least squares line to the inliers, which are determined by the Lenth method. The effects exceeding the prediction limits based on the fitted line are candidates for the vital few effects. To improve the accuracy of partitioning the effects into inliers and outliers, we propose a modified LGB method (hereafter denoted as the Mod_LGB method), in which more outliers can be classified by using both the Carling’s modification of the box plot (Carling, 2000) and Lenth method. If no outlier exists or there is a wide range in the inliers as determined by the Lenth method, more outliers can be found by the Carling method. A simulation study is conducted in unreplicated 24 designs with the number of active effects ranging from 1 to 6 to compare the efficiency of the Lenth method, original LGB methods, and the proposed modified version of the LGB method.  相似文献   
100.
Public investment project (PIP) plays an important role in the China economy. In order to improve the project management performance of public projects, the government is searching for a scientific system to build a construction management supervision mode. This paper introduces the policy background and connotation of Agent Construction System (ACS). As a public investment construction management model, ACS, is gradually being incorporated into the legal framework, it is necessary to improve the construction agent supervision mechanism. This article analyzes the supervision mechanism of construction agent quality management under the principle of two-stage agent mode and establishes an agent quality self-control system and a government co-supervision system. These systems take the contract management as the core and the project quality objective as the guidance. These systems also consist of a two-dimensional framework of vertical self-control and horizontal supervision, which form a quality supervision mechanism. Based on Rough Set theory, the article proposes the idea of building an agent quality self-control and government co-supervision model, and illustrates it with a flow chart for building the model, which paves the way of quantitative research for the future.  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