全文获取类型
收费全文 | 16123篇 |
免费 | 454篇 |
国内免费 | 5篇 |
专业分类
管理学 | 1663篇 |
民族学 | 97篇 |
人才学 | 3篇 |
人口学 | 1278篇 |
丛书文集 | 509篇 |
理论方法论 | 1363篇 |
综合类 | 2251篇 |
社会学 | 6264篇 |
统计学 | 3154篇 |
出版年
2023年 | 83篇 |
2022年 | 88篇 |
2021年 | 96篇 |
2020年 | 254篇 |
2019年 | 319篇 |
2018年 | 423篇 |
2017年 | 549篇 |
2016年 | 383篇 |
2015年 | 317篇 |
2014年 | 411篇 |
2013年 | 2548篇 |
2012年 | 498篇 |
2011年 | 432篇 |
2010年 | 369篇 |
2009年 | 285篇 |
2008年 | 338篇 |
2007年 | 306篇 |
2006年 | 337篇 |
2005年 | 419篇 |
2004年 | 644篇 |
2003年 | 1110篇 |
2002年 | 722篇 |
2001年 | 641篇 |
2000年 | 490篇 |
1999年 | 318篇 |
1998年 | 216篇 |
1997年 | 183篇 |
1996年 | 233篇 |
1995年 | 192篇 |
1994年 | 204篇 |
1993年 | 179篇 |
1992年 | 210篇 |
1991年 | 216篇 |
1990年 | 202篇 |
1989年 | 176篇 |
1988年 | 196篇 |
1987年 | 182篇 |
1986年 | 143篇 |
1985年 | 178篇 |
1984年 | 184篇 |
1983年 | 157篇 |
1982年 | 124篇 |
1981年 | 102篇 |
1980年 | 99篇 |
1979年 | 121篇 |
1978年 | 94篇 |
1977年 | 83篇 |
1975年 | 63篇 |
1974年 | 68篇 |
1973年 | 62篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Financial stress index (FSI) is considered to be an important risk management tool to quantify financial vulnerabilities. This paper proposes a new framework based on a hybrid classifier model that integrates rough set theory (RST), FSI, support vector regression (SVR) and a control chart to identify stressed periods. First, the RST method is applied to select variables. The outputs are used as input data for FSI–SVR computation. Empirical analysis is conducted based on monthly FSI of the Federal Reserve Bank of Saint Louis from January 1992 to June 2011. A comparison study is performed between FSI based on the principal component analysis and FSI–SVR. A control chart based on FSI–SVR and extreme value theory is proposed to identify the extremely stressed periods. Our approach identified different stressed periods including internet bubble, subprime crisis and actual financial stress episodes, along with the calmest periods, agreeing with those given by Federal Reserve System reports. 相似文献
2.
3.
阮咏梅 《宁波大学学报(人文科学版)》2020,33(1):1-6
卫所制度是明清时期重要的军政制度。以浙江沿海明清卫所驻地方言为考察对象,从北到南选取了最有代表性的16个方言点,通过共时和历时的比较,分析和总结浙江沿海明清卫所驻地方言声母在数量和古今分合上的特点。 相似文献
4.
When Working Hard Is Not Enough for Female and Racial/Ethnic Minority Apprentices in the Highway Trades 下载免费PDF全文
Maura Kelly Lindsey Wilkinson Maura Pisciotta Larry S. Williams 《Sociological Forum》2015,30(2):415-438
Drawing on employment records, qualitative interviews, and a survey, we explore the experiences of apprentices in the highway trades in Oregon. We demonstrate that female and racial/ethnic minority apprentices have lower rates of recruitment and retention and disproportionately face challenges with interpersonal interactions, hiring practices, and supervisory practices. Yet, we find a pervasive narrative that attributes apprentices' success to “hard work,” which contributes to the legitimacy of these inequalities. Consistent with the conceptualization of work organizations as inequality regimes, we argue that the apprenticeship system has policies, practices, and ideologies that are on the surface gender and race/ethnicity neutral, yet lead to the perpetuation of inequalities. 相似文献
5.
Researchers have been developing various extensions and modified forms of the Weibull distribution to enhance its capability for modeling and fitting different data sets. In this note, we investigate the potential usefulness of the new modification to the standard Weibull distribution called odd Weibull distribution in income economic inequality studies. Some mathematical and statistical properties of this model are proposed. We obtain explicit expressions for the first incomplete moment, quantile function, Lorenz and Zenga curves and related inequality indices. In addition to the well-known stochastic order based on Lorenz curve, the stochastic order based on Zenga curve is considered. Since the new generalized Weibull distribution seems to be suitable to model wealth, financial, actuarial and especially income distributions, these findings are fundamental in the understanding of how parameter values are related to inequality. Also, the estimation of parameters by maximum likelihood and moment methods is discussed. Finally, this distribution has been fitted to United States and Austrian income data sets and has been found to fit remarkably well in compare with the other widely used income models. 相似文献
6.
7.
This paper explores liminality, a concept receiving increased attention in management and organization studies and gaining prominence because of its capacity to capture the interstitial and temporary elements of organizing and work. The authors present a systematic review of the literature on liminality, covering 61 published papers, and undertake a critical analysis of how the concept of liminality has been used in prior research. This review reveals associations with three main themes: process; position; and place. For each theme, the authors identify the central research questions posed, while comparing individual and collective levels of analysis. During this process, the authors revisit several ideas central to the original, anthropological research on liminality, a perspective from which they suggest a rejuvenation of liminality research in management and organization studies. This paper argues for a greater focus on the liminal experience itself – especially its ritual and temporal dimensions – and for improving the comparative analysis of liminality following the three themes identified in this paper. The authors suggest that revising the agenda for liminality research along these lines could facilitate more informed responses to the challenges of an increasingly temporary and dynamic work life. 相似文献
8.
A. M. Abd El-Raheem 《Journal of Statistical Computation and Simulation》2019,89(16):3075-3104
The generalized half-normal (GHN) distribution and progressive type-II censoring are considered in this article for studying some statistical inferences of constant-stress accelerated life testing. The EM algorithm is considered to calculate the maximum likelihood estimates. Fisher information matrix is formed depending on the missing information law and it is utilized for structuring the asymptomatic confidence intervals. Further, interval estimation is discussed through bootstrap intervals. The Tierney and Kadane method, importance sampling procedure and Metropolis-Hastings algorithm are utilized to compute Bayesian estimates. Furthermore, predictive estimates for censored data and the related prediction intervals are obtained. We consider three optimality criteria to find out the optimal stress level. A real data set is used to illustrate the importance of GHN distribution as an alternative lifetime model for well-known distributions. Finally, a simulation study is provided with discussion. 相似文献
9.
de Jong Petra W. Caarls Kim de Valk Helga A. G. 《Population research and policy review》2022,41(2):671-694
Population Research and Policy Review - The welfare state can be perceived as a safety net which helps individuals adjust to situations of risk or transition. Starting from this idea of the welfare... 相似文献
10.
Witkower Zachary Tracy Jessica L. Pun Anthea Baron Andrew S. 《Journal of Nonverbal Behavior》2021,45(4):505-518
Journal of Nonverbal Behavior - Past research has demonstrated that children understand distinct emotion concepts and can accurately recognize facial expressions of distinct emotions by a young... 相似文献