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   9075篇
  免费   759篇
  国内免费   85篇
管理学   813篇
劳动科学   4篇
民族学   142篇
人口学   146篇
丛书文集   755篇
理论方法论   455篇
综合类   6001篇
社会学   668篇
统计学   935篇
  2024年   31篇
  2023年   151篇
  2022年   182篇
  2021年   219篇
  2020年   259篇
  2019年   191篇
  2018年   226篇
  2017年   296篇
  2016年   271篇
  2015年   292篇
  2014年   391篇
  2013年   914篇
  2012年   656篇
  2011年   656篇
  2010年   432篇
  2009年   340篇
  2008年   472篇
  2007年   615篇
  2006年   583篇
  2005年   516篇
  2004年   435篇
  2003年   381篇
  2002年   313篇
  2001年   281篇
  2000年   202篇
  1999年   114篇
  1998年   87篇
  1997年   53篇
  1996年   76篇
  1995年   67篇
  1994年   44篇
  1993年   32篇
  1992年   27篇
  1991年   19篇
  1990年   19篇
  1989年   19篇
  1988年   17篇
  1987年   9篇
  1986年   2篇
  1985年   3篇
  1984年   8篇
  1983年   5篇
  1982年   3篇
  1981年   3篇
  1980年   1篇
  1979年   3篇
  1978年   1篇
  1977年   2篇
排序方式: 共有9919条查询结果,搜索用时 31 毫秒
1.
核技术应用一般是指射线技术与射线装置在医疗、工农业、地质调查、研究与教育中的应用。我国核技术应用企业研发骨干激励存在着激励的创新导向不足、薪酬激励机制不合理、组织文化有欠缺等问题,需结合行业特点及核技术应用企业研发骨干激励的特殊要求,采取相应的激励对策,包括从核心能力出发研究激励问题、建立适于激励研发人员的能力工资制、注重职业发展激励、注重责任激励、建立激发创新活力的组织文化等。  相似文献   
2.
3.
The concept of reciprocal coordinate subtangent (RCST) has been used as a useful tool to study the monotone behavior of a continuous density function and for characterizing probability distributions. In this paper, we propose a non-parametric estimator for RCST based on the censored dependent data. Asymptotic properties of the estimator are established under suitable regularity conditions. A simulation study is carried out to examine the performance of the estimator. The usefulness of the estimator is also examined through a real data.  相似文献   
4.
鲁迅与穆时英笔下都塑造过一系列具有丑角特质的形象。不同的是,穆时英笔下的丑角具有自觉性,以小丑身份为面具,掩盖自己的孤独与恐惧;鲁迅笔下的丑角多是非自觉的,他们认真地践行着自己的人生理念,却因其与周遭环境格格不入,被人当作小丑、疯子。从中折射出两位作家迥异的生命观,穆时英从个体角度出发,写出了都市人在悲哀的脸上戴了快乐面具的无奈,对丑角表演持拥抱态度;鲁迅则从批判国民性的宏观角度出发,敏锐地意识到了丑角表演背后的隐忧,对其持拒斥的姿态。  相似文献   
5.
构建以国内大循环为主体、国内国际双循环相互促进的新发展格局,是对未来中国经济发展路径做出的重大战略部署,作为连接国内国际双循环的纽带,双向直接投资的发展战略和路径面临重塑和调整。研究认为,应当以推动新时代科技创新和产业升级为目标,提高双向直接投资的质量,畅通供应链和产业链; 以“一带一路”倡议为依托,通过更高水平的双向投资带动中国与沿线国家贸易水平的提高; 建设高水平自贸区和自贸港,提高对外开放标准,更高质量吸引外资,提升参与国际大循环的技术含量和自主性; 在畅通要素流动领域,建立更加完善的现代化物流体系,建设更高标准的要素流通市场体系,降低制度性交易费用,提高生产率和对高质量外资的吸引能力。  相似文献   
6.
In the quest to model various phenomena, the foundational importance of parameter identifiability to sound statistical modeling may be less well appreciated than goodness of fit. Identifiability concerns the quality of objective information in data to facilitate estimation of a parameter, while nonidentifiability means there are parameters in a model about which the data provide little or no information. In purely empirical models where parsimonious good fit is the chief concern, nonidentifiability (or parameter redundancy) implies overparameterization of the model. In contrast, nonidentifiability implies underinformativeness of available data in mechanistically derived models where parameters are interpreted as having strong practical meaning. This study explores illustrative examples of structural nonidentifiability and its implications using mechanistically derived models (for repeated presence/absence analyses and dose–response of Escherichia coli O157:H7 and norovirus) drawn from quantitative microbial risk assessment. Following algebraic proof of nonidentifiability in these examples, profile likelihood analysis and Bayesian Markov Chain Monte Carlo with uniform priors are illustrated as tools to help detect model parameters that are not strongly identifiable. It is shown that identifiability should be considered during experimental design and ethics approval to ensure generated data can yield strong objective information about all mechanistic parameters of interest. When Bayesian methods are applied to a nonidentifiable model, the subjective prior effectively fabricates information about any parameters about which the data carry no objective information. Finally, structural nonidentifiability can lead to spurious models that fit data well but can yield severely flawed inferences and predictions when they are interpreted or used inappropriately.  相似文献   
7.
如何将环境影响评价与排污许可等环境治理工具进行互动与衔接是未来环境治理制度改革的关键。两种制度在现时的环境下都存在各自的问题及相应的变革路径。两种不同的变革路径却有着共同的价值需求,即环境影响评价与排污许可的衔接与互动。在衔接的过程中存在的最大的争议就是维持或简化环境影响评价审批,这种衔接思路的差异制造了两种截然相反的制度逻辑:一种以维持环评审批为核心,另一种以简化环评审批为核心。就中国目前的环境影响评价制度改革方向而言,简化环评审批似乎已是不可阻挡之潮流。是否应当以简化环评审批、强调排污许可为目标进行两种制度的衔接。简化环评审批并不等同于弱化环评制度;在环境影响评价与排污许可的衔接构造上,应当遵循的思路:在宏观上,以效益最大化统领全局;在具体操作上,秉持“在简化环境影响评价的大环境中,寻找强化的契机;以排污许可为核心的进程中,夯实衔接的构造”的理念。  相似文献   
8.
Porter and Kramer’s concept of creating shared value (CSV) has been welcomed as an approach to corporate social responsibility (CSR) among corporations that also provides a practical opportunity for dialogue in public relations, but it has been little examined from the general population’s (i.e., the public’s) perspective. Such scrutiny is important because its findings enable public relations to contribute to the debate and development of CSV from both the public’s and the organization’s viewpoints. Additionally, if public relations professionals understand how the public perceives CSV, they can give a strategic perspective to top management for maximizing moral capabilities of the business and formulate effective communication to promote CSV initiatives. This study investigates whether the public prefers corporations to practice CSV as opposed to intrinsic CSR as a separate pursuit from business interests. It also explores the role of leadership as an influential and ethical construct in implementing effective CSV as perceived by the public. The public’s preference for CSV over intrinsic CSR was revealed in a survey of 1784 participants in the United States (US), Germany, and China. Factor analysis results further suggested that effective CSV competencies of CEOs were construed as a unidimensional concept in the US, but German and Chinese participants viewed it as two-dimensional. The public perceived that leaders’ moral character played a more important, core role in effective CSV than did altruistic and behavioral attributes, across nations. Network analysis of the perceived effective CSV-characteristics provides further implications for CSV communication.  相似文献   
9.
10.
This paper explores the growth of the academic study of nonprofit management and organizations in China by examining theses and dissertations written in China between 2000 and 2018. Using a keyword search, we collect and review 5,346 abstracts available in the China National Knowledge Infrastructure Thesis and Dissertation database. The number of these theses and dissertations accelerated between 2000 and 2015 and slowed thereafter. Most theses and dissertations focus on the external context of nonprofit organizations (78%) and fewer on nonprofit management per se (22%). Thematic analysis reveals several broad subjects of study including organizational development, the character of the external environment and internal operations, financial and other resource support, and organizational performance. Trends across the 19‐year study period relating to national regions of origin, discipline, and theme are also explored. The development of nonprofit studies in China in some ways resembles the growth of this field in the United States and other western countries in past decades, but with distinct Chinese historical, sociocultural, and geographical characteristics.  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