全文获取类型
收费全文 | 1769篇 |
免费 | 62篇 |
专业分类
管理学 | 296篇 |
民族学 | 11篇 |
人口学 | 248篇 |
丛书文集 | 6篇 |
理论方法论 | 203篇 |
综合类 | 21篇 |
社会学 | 898篇 |
统计学 | 148篇 |
出版年
2023年 | 16篇 |
2022年 | 9篇 |
2021年 | 15篇 |
2020年 | 51篇 |
2019年 | 51篇 |
2018年 | 50篇 |
2017年 | 82篇 |
2016年 | 58篇 |
2015年 | 47篇 |
2014年 | 82篇 |
2013年 | 292篇 |
2012年 | 76篇 |
2011年 | 83篇 |
2010年 | 59篇 |
2009年 | 66篇 |
2008年 | 67篇 |
2007年 | 71篇 |
2006年 | 54篇 |
2005年 | 53篇 |
2004年 | 48篇 |
2003年 | 47篇 |
2002年 | 61篇 |
2001年 | 40篇 |
2000年 | 29篇 |
1999年 | 28篇 |
1998年 | 30篇 |
1997年 | 23篇 |
1996年 | 26篇 |
1995年 | 19篇 |
1994年 | 17篇 |
1993年 | 13篇 |
1992年 | 20篇 |
1991年 | 16篇 |
1990年 | 14篇 |
1989年 | 9篇 |
1988年 | 7篇 |
1987年 | 6篇 |
1986年 | 9篇 |
1985年 | 7篇 |
1984年 | 14篇 |
1983年 | 16篇 |
1982年 | 13篇 |
1981年 | 6篇 |
1980年 | 8篇 |
1979年 | 3篇 |
1978年 | 3篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1974年 | 3篇 |
1971年 | 4篇 |
排序方式: 共有1831条查询结果,搜索用时 390 毫秒
111.
Coen Van Limborgh 《Work and stress》2013,27(2-3):342-350
Abstract This study is part of a larger study airned at the development of a system for quantifying the inconvenience of shift schedules and schedule characteristics. The results can be used to reduce inconvenience (counter-value compensation) and to compute the monetary (counter-weight) compensability of shift schedules. The results presented here show that consensus exists among subjects from different organizations and with different background characteristics on the utility of several features, e.g. working at inconvenient hours, the irregularity of a schedule, and working during the evening (which has a positive value). The opinions slightly differ with respect to some other characteristics, such as very long shifts, work during the weekend and the average sequence length. The differences are possibly due to job characteristics. 相似文献
112.
Paul G. Devereux Daniel J. Weigel Deborah Ballard-Reisch Geoffrey Leigh Kristy L. Cahoon 《Child and Adolescent Social Work Journal》2009,26(5):431-446
Despite the substantial amount of literature focusing on social support for pregnant and parenting adolescents, few studies
have directly examined the relationships among stress and social support across their transition to parenting. The present
study investigates the nature of the relationship between stress and support both before and after the birth of the baby.
Two groups of adolescent females (one group facing parenthood and one not) completed measures of support and stress across
a 7-month period (N = 231) to coincide with the transition to parenthood. In general, support and stress were negatively related when measured
concurrently and positively related over time for parenting adolescents but not the non-parenting group. Understanding how
long social support impacts stress will enable practitioners to identify when best to provide interventions for pregnant and
parenting adolescents. 相似文献
113.
Previous research suggests that when there is a high level of inequality, there is a low rate of participation. Two arguments are generally offered: First, inequality depresses participation because people from different status groups have fewer opportunities to share common goals. Second, people may participate more in civic and social life when they have more resources. However, until now, these explanations have not been separated empirically. Using EU-SILC data for 24 European countries, we analyze how income inequality is related to civic and social participation. Our results indicate that the main effects of inequality manifest via resources at the individual and societal level. However, independent of these resources, higher inequality is associated with lower civic participation. Furthermore, inequality magnifies the relationship between income and participation. This finding is in line with the view that inter-individual processes explain why inequality diminishes participation. 相似文献
114.
Kerr DC Capaldi DM Owen LD Wiesner M Pears KC 《Journal of marriage and the family》2011,73(5):1101-1116
Fatherhood can be a turning point in development and in men's crime and substance use trajectories. At-risk boys (N = 206) were assessed annually from ages 12 to 31 years. Crime, arrest, and tobacco, alcohol, and marijuana use trajectories were examined. Marriage was associated with lower levels of crime and less frequent substance use. Following the birth of a first biological child, men's crime trajectories showed slope decreases, and tobacco and alcohol use trajectories showed level decreases. The older men were when they became fathers, the greater the level decreases were in crime and alcohol use and the less the slope decreases were in tobacco and marijuana use. Patterns are consistent with theories of social control and social timetables. 相似文献
115.
116.
Kaatje Els Bollaerts Winy Messens Laurent Delhalle Marc Aerts Yves Van der Stede Jeroen Dewulf Sophie Quoilin Dominiek Maes Koen Mintiens Koen Grijspeerdt 《Risk analysis》2009,29(6):820-840
A quantitative microbial risk assessment (QMRA) according to the Codex Alimentarius Principles is conducted to evaluate the risk of human salmonellosis through household consumption of fresh minced pork meat in Belgium. The quantitative exposure assessment is carried out by building a modular risk model, called the METZOON-model, which covers the pork production from farm to fork. In the METZOON-model, the food production pathway is split up in six consecutive modules: (1) primary production, (2) transport and lairage, (3) slaughterhouse, (4) postprocessing, (5) distribution and storage, and (6) preparation and consumption. All the modules are developed to resemble as closely as possible the Belgian situation, making use of the available national data. Several statistical refinements and improved modeling techniques are proposed. The model produces highly realistic results. The baseline predicted number of annual salmonellosis cases is 20,513 ( SD 9061.45). The risk is estimated higher for the susceptible population (estimate 4.713 × 10−5 ; SD 1.466 × 10−5 ) compared to the normal population (estimate 7.704 × 10−6 ; SD 5.414 × 10−6 ) and is mainly due to undercooking and to a smaller extent to cross-contamination in the kitchen via cook's hands. 相似文献
117.
118.
Event history models, also known as hazard models, are commonly used in analyses of fertility. One drawback of event history models is that the conditional probabilities (hazards) estimated by event history models do not readily translate into summary measures, particularly for models of repeatable events, like childbirth. In this paper, we describe how to translate the results of discrete-time event history models of all births into well-known summary fertility measures: simulated age- and parity-specific fertility rates, parity progression ratios, and the total fertility rate. The method incorporates all birth intervals, but permits the hazard functions to vary across parities. It can also simulate values for groups defined by both fixed and time-varying covariates, such as marital or employment life histories. We demonstrate the method using an example from the National Survey of Family Growth and provide an accompanying data file and Stata program. 相似文献
119.
120.
Despite known risks associated with aberrant social skill development, there has been a relative dearth of literature on typical developmental changes in social skills over time. In this study, we examine systematic changes in social skills from kindergarten (typical age of 5–6 years) to third grade (typical age of 8–9 years), and focus on systematic heterogeneity across these developmental trajectories. Data came from the National Head Start—Public School Early Childhood Transition Demonstration Project (N = 6964). Mixture models provide evidence for multiple classes of individuals representing heterogeneity in the development of social skills. Classes were defined as a majority class (whose trajectories remained relatively stable over time), an increasing class (whose trajectories increased at a faster rate than the majority class), and a decreasing class (whose trajectories decreased at a faster rate than the majority class). Developmental trends accounted for a substantial proportion of the variance in social skill components. Implications and limitations of the study are discussed. 相似文献