全文获取类型
收费全文 | 9295篇 |
免费 | 148篇 |
国内免费 | 3篇 |
专业分类
管理学 | 1553篇 |
民族学 | 33篇 |
人口学 | 792篇 |
丛书文集 | 30篇 |
理论方法论 | 759篇 |
综合类 | 158篇 |
社会学 | 4481篇 |
统计学 | 1640篇 |
出版年
2023年 | 52篇 |
2020年 | 122篇 |
2019年 | 158篇 |
2018年 | 221篇 |
2017年 | 264篇 |
2016年 | 242篇 |
2015年 | 153篇 |
2014年 | 219篇 |
2013年 | 1507篇 |
2012年 | 269篇 |
2011年 | 254篇 |
2010年 | 207篇 |
2009年 | 196篇 |
2008年 | 235篇 |
2007年 | 234篇 |
2006年 | 257篇 |
2005年 | 235篇 |
2004年 | 199篇 |
2003年 | 157篇 |
2002年 | 192篇 |
2001年 | 185篇 |
2000年 | 203篇 |
1999年 | 152篇 |
1998年 | 142篇 |
1997年 | 126篇 |
1996年 | 134篇 |
1995年 | 136篇 |
1994年 | 145篇 |
1993年 | 131篇 |
1992年 | 144篇 |
1991年 | 161篇 |
1990年 | 175篇 |
1989年 | 147篇 |
1988年 | 158篇 |
1987年 | 139篇 |
1986年 | 135篇 |
1985年 | 137篇 |
1984年 | 146篇 |
1983年 | 137篇 |
1982年 | 102篇 |
1981年 | 84篇 |
1980年 | 91篇 |
1979年 | 115篇 |
1978年 | 92篇 |
1977年 | 71篇 |
1976年 | 86篇 |
1975年 | 56篇 |
1974年 | 78篇 |
1973年 | 57篇 |
1970年 | 52篇 |
排序方式: 共有9446条查询结果,搜索用时 15 毫秒
331.
Correlated data are commonly analyzed using models constructed using population-averaged generalized estimating equations (GEEs). The specification of a population-averaged GEE model includes selection of a structure describing the correlation of repeated measures. Accurate specification of this structure can improve efficiency, whereas the finite-sample estimation of nuisance correlation parameters can inflate the variances of regression parameter estimates. Therefore, correlation structure selection criteria should penalize, or account for, correlation parameter estimation. In this article, we compare recently proposed penalties in terms of their impacts on correlation structure selection and regression parameter estimation, and give practical considerations for data analysts. Supplementary materials for this article are available online. 相似文献
332.
We introduce a new family of distributions suitable for fitting positive data sets with high kurtosis which is called the Slashed Generalized Rayleigh Distribution. This distribution arises as the quotient of two independent random variables, one being a generalized Rayleigh distribution in the numerator and the other a power of the uniform distribution in the denominator. We present properties and carry out estimation of the model parameters by moment and maximum likelihood (ML) methods. Finally, we conduct a small simulation study to evaluate the performance of ML estimators and analyze real data sets to illustrate the usefulness of the new model. 相似文献
333.
The effects of under‐skilling on need for recovery,losing employment and retirement intentions among older office workers: A prospective cohort study 下载免费PDF全文
Fleur G. GOMMANS Nicole W.H. JANSEN Dave STYNEN IJmert KANT Andries de GRIP 《International labour review / International Labour Office》2017,156(3-4):525-548
Based on a sample of older workers from the Maastricht Cohort Study, the authors investigate the prevalence and dynamics of self‐reported under‐skilling and its effects on workers' need for recovery, their risk of losing employment and their retirement intentions over a two‐year period. They find that being under‐skilled is associated both with higher levels of need for recovery over time and with the risk of losing employment, but not with early retirement intentions. To achieve sustainable employment, they argue, the course of under‐skilling should be monitored throughout workers' careers, enabling timely interventions to avoid its negative consequences. 相似文献
334.
John W. Creswell Rachel C. Sinley 《KZfSS K?lner Zeitschrift für Soziologie und Sozialpsychologie》2017,69(2):87-105
With much of the development of mixed methods occurring through the works of scholars from the US, the UK, Canada, and the Anglos-Saxon/English-speaking countries, the discourse about a global research community must consider how it needs to be sensitive to diverse cultures. Clearly, the discussion must focus on adapting mixed methods to best fit the problems of countries, the cultural norms of conducting research, and the scholarly talents of in-country investigators. Unfortunately, the mixed methods literature is largely silent on diverse cultural adaptations of mixed methods.In this article, we first trace the involvement of worldwide countries in the historic development of mixed methods. Then, to gain a better understanding of the use and adaptation of mixed methods in diverse world academic cultures, we provide a qualitative study of themes mentioned by participants from seven different countries. From both the historical overview and the qualitative study, we end by making suggestions about specific strategies for a global discourse about mixed methods research, and suggest a de-colonizing presence of the Anglo-Saxon/English-speaking countries in the global expansion of mixed methods. 相似文献
335.
Scott W. Semenyna Doug P. VanderLaan Lanna J. Petterson Paul L. Vasey 《Journal of sex research》2017,54(8):1077-1084
Previous research established that male androphilia (i.e., sexual arousal and attraction to adult males) clusters in families. Some studies find that male androphilia clusters in both the paternal and maternal lines, while others find that it clusters only in the latter. Most of the research investigating the familial nature of male androphilia has taken place in Western cultural contexts that are problematic for such research because they are characterized by low fertility. To address this, our previous work has examined familial patterning of male androphilia in Samoa, a high-fertility population in which androphilic males are readily identified due to their public status as fa’afafine (a third gender category). Building on this work, the present study replicated the familial nature of male androphilia in Samoa using a sample size that was ~122% larger than the one we previously employed (N = 382, M ±SD age: 29.72 years ±10.16). Samoan fa’afafine had significantly more fa’afafine relatives in their maternal and paternal lines compared to Samoan gynephilic males (p < .001). The prevalence of male androphilia was equivalent across both the paternal and maternal lines (all p > .15). The revised prevalence estimate of male androphilia in Samoa falls between 0.61% and 3.51%. 相似文献
336.
Wesley W. Wilson 《Economic inquiry》2017,55(4):2031-2037
337.
Evrim Gülbetekin Seda Bayraktar Özlenen Özkan Ömer Özkan 《Journal of Nonverbal Behavior》2017,41(4):325-343
One of the most prevalent problems in face transplant patients is an inability to generate facial expression of emotions. The purpose of this study was to measure the subjective recognition of patients’ emotional expressions by other people. We examined facial expression of six emotions in two facial transplant patients (patient A = partial, patient B = full) and one healthy control using video clips to evoke emotions. We recorded target subjects’ facial expressions with a video camera while they were watching the clips. These were then shown to a panel of 130 viewers and rated in terms of degree of emotional expressiveness on a 7-point Likert scale. The scores for emotional expressiveness were higher for the healthy control than they were for patients A and B, and these varied as a function of emotion. The most recognizable emotion was happiness. The least recognizable emotions in Patient A were fear, surprise, and anger. The expressions of Patient B scored lower than those of Patient A and the healthy control. The findings show that partial and full-face transplant patients may have difficulties in generating facial expression of emotions even if they can feel those emotions, and different parts of the face seem to play critical roles in different emotional expressions. 相似文献
338.
Carmen Rodríguez-Wangüemert Juan Martínez-Torvisco 《International Review of Sociology》2017,27(2):230-240
Human rights (HR), from the perspective of interest and thematic selection, are recognized in the topics of the communication. In general, there is considered to be a positive relationship between the media and its function of mediation with citizenship in reference to the declared general principles since inception in 1948. With this approach, the paper deals with providing an updated reflection of that connection and its main difficulties, such as the crisis of credibility in the information in the context of the European Union and within the framework of the paradigm changes that has derived in the knowledge society of the so-called third environment. The precepts of those recognized as generations of HR survive in the informational stories, of which, due to their current relevance in recent decades, those related to migratory movements, inequality, and poverty stands out. Moreover, the paper explores and discusses how a new generation derived from the implementation and intervention of technology gets involved as an essential characteristic in the relations between the members of society. 相似文献
339.
Although subprime mortgage lending and unemployment were largely responsible for the wave of foreclosures during the Great Recession, additional sources of financial risk may have exacerbated the crisis. We hypothesize that many parents sending children to college were financially overextended and vulnerable to foreclosure as the economy contracted. With commuting zone panel data from 2006 to 2011, we show that increasing rates of college attendance across the income distribution in one year predict a foreclosure rate increase in subsequent years, net of fixed characteristics and changes in employment, refinance debt, house prices, and 19-year-old population size. We find similar evidence of college-related foreclosure risk using longitudinal household data from the Panel Study of Income Dynamics. Our findings uncover a previously overlooked dimension of the foreclosure crisis, and highlight mortgage insecurity as an inadvertent consequence of parental investment in higher education. 相似文献
340.
Takemore Chagomoka Axel Drescher Rüdiger Glaser Bernd Marschner Johannes Schlesinger Abdul-Razak Abizari Hanna Karg George Nyandoro 《Population and environment》2018,40(1):27-46
Food and nutrition insecurity remains a challenge in sub-Saharan Africa. Several studies have examined food and nutrition insecurity in urban or rural areas but have not captured the whole continuum. Between November and December 2013, 240 households were surveyed along the urban–rural continuum in Northern Ghana. The study objective was to understand the socio-spatial dynamics of household food and nutrition insecurity and to investigate the role played by urban, peri-urban and rural agriculture. The study found that there was more involvement in agriculture in rural areas compared to peri-urban areas and urban areas. Households from urban areas were more food insecure (HFIAS >?11) compared to their counterparts in peri-urban and the rural areas. Stunting increased by 3.4 times (p?=?0.048) among households located in the peri-urban area. Wasting was reduced by 0.16 times among household that produced staple food or vegetables (p?=?0.011). Overweight was reduced by 0.04 times among households that produced livestock (p?=?0.031). The results reveal a socio-spatial dimension of food and nutrition insecurity that is related to agricultural activities. 相似文献