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   7724篇
  免费   672篇
  国内免费   71篇
管理学   1082篇
劳动科学   2篇
民族学   87篇
人才学   1篇
人口学   162篇
丛书文集   557篇
理论方法论   801篇
综合类   3233篇
社会学   2012篇
统计学   530篇
  2024年   4篇
  2023年   25篇
  2022年   59篇
  2021年   147篇
  2020年   193篇
  2019年   350篇
  2018年   191篇
  2017年   295篇
  2016年   328篇
  2015年   371篇
  2014年   420篇
  2013年   656篇
  2012年   449篇
  2011年   500篇
  2010年   473篇
  2009年   476篇
  2008年   504篇
  2007年   454篇
  2006年   495篇
  2005年   394篇
  2004年   338篇
  2003年   307篇
  2002年   339篇
  2001年   295篇
  2000年   189篇
  1999年   62篇
  1998年   16篇
  1997年   16篇
  1996年   27篇
  1995年   14篇
  1994年   22篇
  1993年   13篇
  1992年   8篇
  1991年   7篇
  1990年   7篇
  1989年   9篇
  1988年   7篇
  1987年   2篇
  1986年   3篇
  1984年   1篇
  1982年   1篇
排序方式: 共有8467条查询结果,搜索用时 15 毫秒
71.
Juvenile crime affects not only the victims of the crime but also the delinquents’ future. How to prevent adolescent criminal behavior has become an important public policy issue. This study contributes to this interesting issue by examining the relationship between tattooing and adolescents’ criminal behavior. In particular, this study investigates whether or not having a tattoo/tattoos is connected to the incidence of various criminal activities, including: larceny, robbery, fraud, assault, drug use, and homicide. A unique sample of 973 juvenile detainees drawn from the administrative profiles in Taiwan and the coarsened exact matching method were utilized. Results show that compared to their nontattooed counterparts, tattooed juvenile detainees were significantly more likely to commit fraud, assault, drug abuse, and homicide by 3%, 13%, 9%, and 9%, respectively. In contrast, tattooing was not significantly associated with larceny or robbery. From a policy perspective, given the significant link between tattooing and criminal behavior, the presence of a tattoo in adolescents may serve as a valuable indicator regarding adolescents’ high probability of committing crimes.  相似文献   
72.
This paper provides a critique of existing research on the internationalization process of the firm and proposes an agenda for future inquiry. In recent years, process approaches have received increasing attention in management research, leading to a more refined understanding of the distinction between process and variance paradigms. We apply a process lens to a well‐established sub‐field of international business, namely the internationalization process of the firm. We review how this research tradition has evolved over four decades. The review commences with a reassessment of the seminal ‘stage models’ that date back to the 1970s. It then proceeds to classify subsequent research on the basis of whether it includes process data and/or process theorizing. It is found that the majority of studies in this review do not combine process data with process theorizing. We show how, even in studies that contain some process elements, a process approach is not always sustained throughout the paper. On the basis of this review, six research themes are proposed, which would form the basis for a process agenda for future research.  相似文献   
73.
In chemical and microbial risk assessments, risk assessors fit dose‐response models to high‐dose data and extrapolate downward to risk levels in the range of 1–10%. Although multiple dose‐response models may be able to fit the data adequately in the experimental range, the estimated effective dose (ED) corresponding to an extremely small risk can be substantially different from model to model. In this respect, model averaging (MA) provides more robustness than a single dose‐response model in the point and interval estimation of an ED. In MA, accounting for both data uncertainty and model uncertainty is crucial, but addressing model uncertainty is not achieved simply by increasing the number of models in a model space. A plausible set of models for MA can be characterized by goodness of fit and diversity surrounding the truth. We propose a diversity index (DI) to balance between these two characteristics in model space selection. It addresses a collective property of a model space rather than individual performance of each model. Tuning parameters in the DI control the size of the model space for MA.  相似文献   
74.
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   
75.
Several colorectal cancer (CRC) screening models have been developed describing the progression of adenomas to CRC. Currently, there is increasing evidence that serrated lesions can also develop into CRC. It is not clear whether screening tests have the same test characteristics for serrated lesions as for adenomas, but lower sensitivities have been suggested. Models that ignore this type of colorectal lesions may provide overly optimistic predictions of the screen‐induced reduction in CRC incidence. To address this issue, we have developed the Adenoma and Serrated pathway to Colorectal CAncer (ASCCA) model that includes the adenoma‐carcinoma pathway and the serrated pathway to CRC as well as characteristics of colorectal lesions. The model structure and the calibration procedure are described in detail. Calibration resulted in 19 parameter sets for the adenoma‐carcinoma pathway and 13 for the serrated pathway that match the age‐ and sex‐specific adenoma and serrated lesion prevalence in the COlonoscopy versus COlonography Screening (COCOS) trial, Dutch CRC incidence and mortality rates, and a number of other intermediate outcomes concerning characteristics of colorectal lesions. As an example, we simulated outcomes for a biennial fecal immunochemical test screening program and a hypothetical one‐time colonoscopy screening program. Inclusion of the serrated pathway influenced the predicted effectiveness of screening when serrated lesions are associated with lower screening test sensitivity or when they are not removed. To our knowledge, this is the first model that explicitly includes the serrated pathway and characteristics of colorectal lesions. It is suitable for the evaluation of the (cost)effectiveness of potential screening strategies for CRC.  相似文献   
76.
作为解构主义美学的核心观念.解构指向的是一种本体性的、生生不息的、蕴含着极大颠覆性与创造性的内驱力。解构产生于结构成为结构的那一刻,是对他者性召唤的肯定性应答,是对结构等级制秩序的颠覆。解构在解放他者的同时也解放了他者的对立面,它不知疲倦地从一种结构奔向另一种全新的结构,以致无穷。解构性事件就是这从一个结构转向另一个结构的关节点。解构特有的自由、民主精神使得解构主义美学成为一种批判的理论、一种肯定的理论,同时它还是一种辩证法。  相似文献   
77.
Although much has been written about Frank Parsons, the founder of the vocational guidance movement, little is known about the 1st counseling staff of the Vocation Bureau. Lucinda Wyman Prince, Ralph Albertson, and Philip Davis each deserve recognition for their role in founding vocation guidance as well as their civic contributions. This article describes the roles and contribution of the profession's 1st counselors.  相似文献   
78.
随着艾滋病防治督导与评估重要性的凸显,我国也积极努力地尝试建立国家综合协调的艾滋病防治督导与评估体系。能力建设是督导与评估工作的基础和前提,本文围绕督导与评估能力建设的概念和目标,提出加强能力建设的建议和方向。  相似文献   
79.
建设法治型政府、责任型政府和服务型政府是我国政府进行政府改革的有益尝试,是用新的价值取向和路径选择对传统政府管理模式进行根本性或方向性的调整.本文将对这三种政府管理模式作一番现实考量和理论分析,以求正确处理好它们之间的关系,努力彰显出它们在目前我国市场经济发展水平和社会整体发展水平中的本色和个性,并使其相辅相成、相互促进,塑造"三合一"型政府管理模式,可以实现社会理想的崇高意蕴,契合"和谐社会"的构建,这对促进我国经济社会协调发展和全面进步,具有重大的理论和实践意义.  相似文献   
80.
本文在论述工业革命和知识革命过程的基础上,简要介绍了现代民族素质的发展状况.  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