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   30347篇
  免费   1558篇
  国内免费   225篇
管理学   1319篇
劳动科学   3篇
民族学   459篇
人才学   7篇
人口学   422篇
丛书文集   3803篇
理论方法论   1565篇
综合类   21229篇
社会学   1432篇
统计学   1891篇
  2024年   23篇
  2023年   175篇
  2022年   519篇
  2021年   338篇
  2020年   360篇
  2019年   384篇
  2018年   441篇
  2017年   527篇
  2016年   594篇
  2015年   725篇
  2014年   1729篇
  2013年   2005篇
  2012年   2125篇
  2011年   2345篇
  2010年   1877篇
  2009年   1772篇
  2008年   1813篇
  2007年   2165篇
  2006年   2121篇
  2005年   2112篇
  2004年   1902篇
  2003年   1843篇
  2002年   1450篇
  2001年   1275篇
  2000年   702篇
  1999年   175篇
  1998年   94篇
  1997年   89篇
  1996年   103篇
  1995年   54篇
  1994年   35篇
  1993年   47篇
  1992年   27篇
  1991年   23篇
  1990年   11篇
  1989年   11篇
  1988年   13篇
  1987年   7篇
  1986年   2篇
  1985年   13篇
  1984年   21篇
  1983年   21篇
  1982年   22篇
  1981年   16篇
  1980年   8篇
  1979年   10篇
  1978年   4篇
  1976年   1篇
  1975年   1篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
91.
河北省作为京津冀协同发展及其雄安新区建设的重要一环,具有很强文化资源禀赋。通过对河北省传统文化近期偏好、现代阐释和愿景设计的研究,为河北省消除地区文化差异和经济差异提供理论指导,并为之注入现代内涵,具有很强的现实意义和理论意义。  相似文献   
92.
Recent research suggests that unequal access to home country institutional resources affects firm internationalization strategies. We add to this debate, based on an analysis of state-owned (SOEs) and non-state-owned (NSOEs) Chinese mining firms, by developing a more dynamic and multi-layered understanding of this interplay. We find that home institutional support can be ownership-based or performance-based, whereby the former benefits SOEs and the latter favors high-performing NSOEs. Combined, these support structures serve as institutional control mechanisms in promoting competition, performance and loyalty to national policies. In addition, they establish a permanent link between firm- and home country-specific assets and incentivize firms to develop dynamic resource access capabilities at home and abroad. Our findings inform our understanding of the firms-institutions nexus and Chinese foreign direct investment dynamics, especially in industries of strategic importance to the state.  相似文献   
93.
Community-based elder care has become a dominant model in the world. However, the role of community-level factors in helping or hindering the individuals concerned in obtaining the needed care has not received much attention. This research aims to investigate how community-level factors, including neighborhood disadvantage, residential instability, and social service environment affect the need for instrumental, medical, and emotional services of Chinese senior residents. Employing the hierarchical multiple regression analysis, the results show that instrumental activities of daily living impairment contributed significantly to the need for instrumental, medical and emotional services. Living alone was found to be associated with the need for medical and emotional services. Objective socioeconomic status was only significantly related to the need for medical care. The type of urban community was positively associated with the need for instrumental services and was negatively related to the need for medical care. Residential instability was positively associated with of the need for instrumental services and medical care. Social service environments had heterogeneous effects on the need for social services. However, neighborhood disadvantage had no significant impact on the need for social services. Implications for future research and policy reform were also discussed.  相似文献   
94.
Beginning in the 1980s, and continuing for over three decades since, a particular generation of Tibetans from the Northeastern Tibetan region known as Amdo, and particularly from the northern parts of China’s Qinghai province, has proven extremely productive. Why has this generation, born primarily between 1959 and 1967, been so incredibly successful? This article examines the contextual factors that may have contributed to the incredible success of this generation. This ranges from the policies and circumstances that affected their births, and the state of the cultural field at the time they reached adulthood. Personal experience narratives, autobiographies, and scholarly studies then reveal how this generation was able to access the intellectual field. Finally, I briefly discuss how the Amdo Tibetan intellectual field compares with other Tibetan and ethnic experiences in the People’s Republic of China.  相似文献   
95.
Portmanteau tests are typically used to test serial independence even if, by construction, they are generally powerful only in presence of pairwise dependence between lagged variables. In this article, we present a simple statistic defining a new serial independence test, which is able to detect more general forms of dependence. In particular, differently from the Portmanteau tests, the resulting test is powerful also under a dependent process characterized by pairwise independence. A diagram, based on p-values from the proposed test, is introduced to investigate serial dependence. Finally, the effectiveness of the proposal is evaluated in a simulation study and with an application on financial data. Both show that the new test, used in synergy with the existing ones, helps in the identification of the true data-generating process. Supplementary materials for this article are available online.  相似文献   
96.
Early phase 2 tuberculosis (TB) trials are conducted to characterize the early bactericidal activity (EBA) of anti‐TB drugs. The EBA of anti‐TB drugs has conventionally been calculated as the rate of decline in colony forming unit (CFU) count during the first 14 days of treatment. The measurement of CFU count, however, is expensive and prone to contamination. Alternatively to CFU count, time to positivity (TTP), which is a potential biomarker for long‐term efficacy of anti‐TB drugs, can be used to characterize EBA. The current Bayesian nonlinear mixed‐effects (NLME) regression model for TTP data, however, lacks robustness to gross outliers that often are present in the data. The conventional way of handling such outliers involves their identification by visual inspection and subsequent exclusion from the analysis. However, this process can be questioned because of its subjective nature. For this reason, we fitted robust versions of the Bayesian nonlinear mixed‐effects regression model to a wide range of TTP datasets. The performance of the explored models was assessed through model comparison statistics and a simulation study. We conclude that fitting a robust model to TTP data obviates the need for explicit identification and subsequent “deletion” of outliers but ensures that gross outliers exert no undue influence on model fits. We recommend that the current practice of fitting conventional normal theory models be abandoned in favor of fitting robust models to TTP data.  相似文献   
97.
产业学院是应用型高校为服务地方社会经济的发展而与企业深度合作形成的新型办学机构,由高校和企业共同投资,实行理事会领导、院长负责的管理体制,校企协同育人,重视实践教学,组织特征鲜明,办学优势突出。但是,产业学院在发展过程中面临诸多不足:独立法人地位尚未确立,进一步发展缺乏法律保障和依据;现代治理方式和结构尚未建立,具体工作受高校干扰较多,行政化色彩浓厚;运行成本大,缺乏市场化运行机制。为了促进产业学院发展,国家应确立其独立的法律地位,营造发展的政策环境和建立现代化的治理方式与结构;产业学院应建立市场化运行机制,激发面对市场的应变能力,最大限度地发挥自身优势,化解发展过程中的短板。  相似文献   
98.
The aim of this paper is to examine whether and how rural residents’ educational attainment is associated with their self-rated health in China. Taking advantage of the National Exercise Facility Survey that was collected between December 2015 and March 2016, we find that educational attainment has a significant and positive correlation with self-rated health, net of the effects of age, gender, and geographical region. This correlation is mediated by factors such as perceived importance of exercise and healthy lifestyle. Relatively, people’s cognitive knowledge about health-related information and material resource access fail to play a significant mediating role. The findings highlight the non-material and non-cognitive attributes of educational attainment in shaping the gradient of health in the rural setting of China. Interventions that expand formal education to the mass and optimize teaching contents may offer an effective means to balance the health gradient.  相似文献   
99.
100.
Post-crisis policy making increasingly focuses on doing business reforms. We argue that the effects of those reforms will be different across countries. To understand the reasons for the reform outcome divergence, we advance a novel firm-size distribution (FSDs) argument. At the center of the argument is the fact that FSDs are different across countries and stable over time. Then, if a given doing business reform induces firms of different size to grow differently, this will produce a variety of reform outcomes across countries. To advance the argument, we set up a tractable general equilibrium (GE) model and study how firms of different size grow after a doing business reform. The model predicts that larger firms will grow faster than smaller firms after the reform. The model predictions are tested on the Enterprise Surveys (ES) data, merged with the Doing Business indicators. We confirm that firms of different size grow differently after a Doing Business reform. Thus, based on the notable differences of firm size distributions across countries, identical reforms to start, operate and close a business will produce a variety of reform outcomes across countries.  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