全文获取类型
收费全文 | 16373篇 |
免费 | 392篇 |
专业分类
管理学 | 2124篇 |
民族学 | 62篇 |
人才学 | 6篇 |
人口学 | 1403篇 |
丛书文集 | 78篇 |
教育普及 | 3篇 |
理论方法论 | 1450篇 |
综合类 | 174篇 |
社会学 | 8354篇 |
统计学 | 3111篇 |
出版年
2023年 | 84篇 |
2021年 | 93篇 |
2020年 | 204篇 |
2019年 | 306篇 |
2018年 | 341篇 |
2017年 | 504篇 |
2016年 | 341篇 |
2015年 | 260篇 |
2014年 | 344篇 |
2013年 | 3178篇 |
2012年 | 477篇 |
2011年 | 437篇 |
2010年 | 322篇 |
2009年 | 299篇 |
2008年 | 328篇 |
2007年 | 340篇 |
2006年 | 356篇 |
2005年 | 334篇 |
2004年 | 294篇 |
2003年 | 244篇 |
2002年 | 299篇 |
2001年 | 394篇 |
2000年 | 349篇 |
1999年 | 382篇 |
1998年 | 263篇 |
1997年 | 247篇 |
1996年 | 279篇 |
1995年 | 282篇 |
1994年 | 301篇 |
1993年 | 292篇 |
1992年 | 303篇 |
1991年 | 288篇 |
1990年 | 315篇 |
1989年 | 276篇 |
1988年 | 281篇 |
1987年 | 250篇 |
1986年 | 231篇 |
1985年 | 251篇 |
1984年 | 237篇 |
1983年 | 189篇 |
1982年 | 185篇 |
1981年 | 161篇 |
1980年 | 163篇 |
1979年 | 178篇 |
1978年 | 153篇 |
1977年 | 131篇 |
1976年 | 136篇 |
1975年 | 140篇 |
1974年 | 90篇 |
1973年 | 89篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Kerry J. Daly Ph.D. 《Qualitative sociology》1992,15(4):395-417
Resocialization is pulled out of its structuralist roots and recast into an interactionist framework. Building on a substantive theory of the resocialization experience of becoming an adoptive parent, three theoretical properties of interactionist resocialization are presented. These can be summarized as involving unlearning and relearning some aspects of a core identity; the interpretation and active reconstruction of that identity which has reciprocal effects on all actors involved; and finally, the effects of both situational and trans-situational norms that give shape to the resocialization experience. Suggestions are made for other substantive areas of research that could be used for comparative analysis in order to further refine a formal theory of interactionist resocialization. 相似文献
72.
John D. Krumboltz 《The Career development quarterly》1993,42(2):143-148
Career and personal counseling are inextricably intertwined. Career problems have a strong emotional component. Career indecision and procrastination may be better interpreted as zeteophobia, the fear of career exploration. Trait and factor theory pictures career counseling as unrealistically simplistic and leads neophytes to view it as boring. Training all counselors to integrate career and personal counseling would lead to better service for clients. 相似文献
73.
74.
In the development of many diseases there are often associated random variables which continuously reflect the progress of a subject towards the final expression of the disease (failure). At any given time these processes, which we call stochastic covariates, may provide information about the current hazard and the remaining time to failure. Likewise, in situations when the specific times of key prior events are not known, such as the time of onset of an occult tumour or the time of infection with HIV-1, it may be possible to identify a stochastic covariate which reveals, indirectly, when the event of interest occurred. The analysis of carcinogenicity trials which involve occult tumours is usually based on the time of death or sacrifice and an indicator of tumour presence for each animal in the experiment. However, the size of an occult tumour observed at the endpoint represents data concerning tumour development which may convey additional information concerning both the tumour incidence rate and the rate of death to which tumour-bearing animals are subject. We develop a stochastic model for tumour growth and suggest different ways in which the effect of this growth on the hazard of failure might be modelled. Using a combined model for tumour growth and additive competing risks of death, we show that if this tumour size information is used, assumptions concerning tumour lethality, the context of observation or multiple sacrifice times are no longer necessary in order to estimate the tumour incidence rate. Parametric estimation based on the method of maximum likelihood is outlined and is applied to simulated data from the combined model. The results of this limited study confirm that use of the stochastic covariate tumour size results in more precise estimation of the incidence rate for occult tumours. 相似文献
75.
D. R. Wingo 《Statistical Papers》1993,34(1):271-276
In a recent paper in this journal, Lee, Kapadia and Brock (1980) developed maximum likelihood (ML) methods for estimating the scale parameter of the Rayleigh distribution from doubly censored samples. They reported convergence difficulties in attempting to solve numerically the nonlinear likelihood equation (LE). To mitigate these difficulties, they employed approximations to simplify the LE, but found that the solution of the resulting simplified equation can give rise to parameter estimates of erratic accuracy. We show that the use of approximations to simplify the LE is unnecessary. In fact, under suitable parametric transformation, the log-likelihood function is strictly concave, the ML estimate always exists, is unique and finite. Furthermore, the LE is easy to solve numerically. A numerical example is given to illustrate the computations involved. 相似文献
76.
William A. Mueller D.M.D. 《Child and Adolescent Social Work Journal》1993,10(5):395-401
Dental caries in children is now recognized as a preventable disease. The use of fluoride and sealants has produced a major reduction in caries prevalence among school aged children in the United States and other countries. A portion of the child population who are educationally and socioeconomically disadvantaged are not fully receiving these benefits. Public policy, insurance and medicaid groups must be made aware of these preventative measures and strategies developed to implement them. 相似文献
77.
Neglected voices and excessive demands in feminist research 总被引:1,自引:1,他引:0
Shulamit Reinharz Ph.D. 《Qualitative sociology》1993,16(1):69-76
78.
79.
80.
Daniel F. Skelly 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》1994,4(4):555-568
Tax-exempt, non-profit organisations represent a significant and growing sector within the US economy. Between 1975 and 1990, assets of tax-exempt organisations increased in real terms by over 150 per cent while the revenue increased by over 227 per cent. This compares to a growth in real GDP of 52 per cent over the same period. A variety of tax policy issues on tax-exempt organisations and the non-profit sector can be addressed using several sources of data collected by the IRS from federal information and tax returns of exempt organisations. The Statistics of Income (SOI) Division, using sample data, conducts studies of many of the different components of the tax-exempt sector, including non-profit charitable organisations, organisations exempt under sections 501(c)(4)-(c)(9), private foundations and 4947(a) charitable trusts, and the unrelated business income of tax-exempt organisations. Income statement, balance sheet and other financial data, as well as a great amount of non-financial information, are collected in these SOI studies. The primary purposes of this article are: first, to document the role of the non-profit sector in the US economy and the evolving growth and change within the sector from the mid-1970s through to the present; and, second, to describe the ongoing SOI studies of tax-exempt organisations, the products and services available through SOI, and the future statistical plans at SOI for data collection and analysis of tax-exempt organisations and the non-profit sector. 相似文献