全文获取类型
收费全文 | 28890篇 |
免费 | 558篇 |
国内免费 | 3篇 |
专业分类
管理学 | 3903篇 |
民族学 | 167篇 |
人才学 | 3篇 |
人口学 | 2541篇 |
丛书文集 | 142篇 |
教育普及 | 1篇 |
理论方法论 | 2695篇 |
综合类 | 396篇 |
社会学 | 14520篇 |
统计学 | 5083篇 |
出版年
2023年 | 163篇 |
2021年 | 176篇 |
2020年 | 464篇 |
2019年 | 718篇 |
2018年 | 817篇 |
2017年 | 1098篇 |
2016年 | 832篇 |
2015年 | 580篇 |
2014年 | 770篇 |
2013年 | 5006篇 |
2012年 | 1004篇 |
2011年 | 964篇 |
2010年 | 734篇 |
2009年 | 628篇 |
2008年 | 747篇 |
2007年 | 742篇 |
2006年 | 747篇 |
2005年 | 638篇 |
2004年 | 623篇 |
2003年 | 507篇 |
2002年 | 550篇 |
2001年 | 691篇 |
2000年 | 604篇 |
1999年 | 574篇 |
1998年 | 456篇 |
1997年 | 395篇 |
1996年 | 414篇 |
1995年 | 412篇 |
1994年 | 376篇 |
1993年 | 390篇 |
1992年 | 421篇 |
1991年 | 420篇 |
1990年 | 419篇 |
1989年 | 378篇 |
1988年 | 351篇 |
1987年 | 333篇 |
1986年 | 327篇 |
1985年 | 377篇 |
1984年 | 345篇 |
1983年 | 312篇 |
1982年 | 274篇 |
1981年 | 215篇 |
1980年 | 251篇 |
1979年 | 270篇 |
1978年 | 223篇 |
1977年 | 191篇 |
1976年 | 170篇 |
1975年 | 184篇 |
1974年 | 180篇 |
1973年 | 127篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
S. M. R. Alavi 《统计学通讯:理论与方法》2017,46(5):2193-2201
992.
A new two-parameter distribution, the gamma-Maxwell distribution, isproposed and studied. We generate the new distribution using the gamma-G generator of distributions. The proposal distribution can be seen as an extension of the Maxwell distribution with more flexibility in terms of the distribution asymmetry and kurtosis. We study some probability properties, discuss maximum-likelihood estimation and present a real data application indicating that the new distribution can improve the ordinary Maxwell distribution in fitting real data. 相似文献
993.
994.
Nathaniel E. Urama Emmanuel O. Nwosu Denis N. Yuni Stephen E. Aguegboh 《International migration (Geneva, Switzerland)》2017,55(1):37-50
The study analyses how remittances to Nigeria affect the labour supply of recipients using Propensity Score Matching (PSM) and a Log‐Linear regression model, with data from the 2013 Nigerian General Household Survey. The PSM results show that for the entire sample, the difference between the average amount of labour supplied per week by those that receive remittances and the amount they would have supplied without remittances is insignificant. The marginal impact analysis also shows that, ceteris paribus, the average labour supply for all recipients is inelastic to remittances. The results from the sub‐group analysis, however, show that receiving remittances negatively affects the labour supply of the self‐employed in agriculture, teenagers and the elderly. These results led us to the recommendation that policies to increase the inflow of remittances should be encouraged but in tandem with programmes to educate farmers on the benefit of investing remittances received in their farming business. 相似文献
995.
This qualitative study focuses on the different ways time is experienced by children in families who face time challenges because of a family member's job that required work travel. Data are from a family‐level study that includes interviews of all family members older than age 7. Using grounded theory methodology, this study illustrates the ways in which job demands and family processes interact. The analysis centers on 75 children's perspectives from 43 families. Holding together assessments of having enough time while wanting more time with their parents, children express emotion, generally unrecognized by parents, around the topic of family time. Children's experience of time with parents is rushed or calm, depending on the activities done in time and the gender of the parent with whom they spend time. Findings are interpreted through a feminist social constructionist lens. 相似文献
996.
Using data from the Fragile Families and Child Wellbeing survey linked to respondents' medical records (N = 2,870), this study examines the association between grandparents' education and birth outcomes and explores potential pathways underlying this relationship. Results show that having a grandfather with less than a high school education was associated with a 93 gram reduction in birth weight, a 59% increase in the odds of low birth weight, and a 136% increase in the odds of a neonatal health condition when compared with having a grandfather with a high school education or more. These associations were partially accounted for by mother's educational attainment and marital status as well as by prenatal history of depression, hypertension, and prenatal health behaviors, depending on the specific outcome. The findings from this study call for heightened attention to the multigenerational influences of educational attainment for infant health. 相似文献
997.
Psychological Distress,Couple Interactions,and Parenting: A Dyadic Analysis of African American Couples 下载免费PDF全文
Parental depression is a well‐established risk factor for couple conflict and ineffective or hostile parenting (M. C. Lovejoy, P. A. Graczyk, E. O'Hare, & G. Neuman, 2000; L. M. Papp, M. C. Goeke‐Morey, & E. M. Cummings, 2007). Although research suggests that caregiver depression may impact parenting indirectly via increased conflict between couples (e.g., R. D. Conger et al., 2002), few studies take into account the behaviors of both caregivers in exploring these relations. The goal of the current study is to employ an actor–partner mediator model to examine the complex relations among psychological distress, negative couple interactions, and parenting. Using a sample of 162 African American couples with children, we find evidence that the psychological distress of each caregiver has an effect on couple interactions for both men and women. The effects from each caregivers' distress to parenting are mainly indirect through the interactional behaviors of the mother toward the father, consistent with the father vulnerability hypothesis (e.g., E. M. Cummings, M. Goeke‐Morey, & J. Raymond, 2004). 相似文献
998.
Bisexual youth are at elevated risk for depression when compared with lesbians and gay men. Research on bisexual stigma suggests that these youth are uniquely vulnerable to stress related to sexual identity disclosure. Depression associated with this stress may be buffered by social support from parents and friends. We examined the differential influence of social support from parents and friends (Child and Adolescent Social Support Scale) on the relation between disclosure stress (LGBTQ Coming Out Stress Scale) and depressive symptoms (Beck Depression Inventory) and differences by gender in a sample of cisgender bisexual youth (N = 383) using structural equation modeling. Parental support buffered the association between stressful disclosure to family and depressive symptoms, especially for bisexual men; bisexual women seemed not to benefit from such support when disclosure stress was high. This nuanced examination elucidates the ways family members and clinicians can best support bisexual youth sexual identity disclosure. 相似文献
999.
Sexual harassment on college campuses is a frequent occurrence and serious public health concern. Victims of sexual harassment are at risk for many possible negative health consequences. In addition, certain psychological distress symptoms and/or alcohol use may put individuals at increased risk of being victims of sexual harassment. Data from more than 2,000 college students in the Midwestern United States were used to examine reciprocal causal effects of the relations between (a) experiencing sexual harassment and alcohol use and (b) experiencing sexual harassment and psychological distress symptoms, specifically depression and anger/hostility. Analyses were conducted separately for sexual harassment which occurs at school and which occurs in college students’ workplaces, and also separately for men and women. Results of cross-lagged panel models showed that there were reciprocal causal effects between sexual harassment and alcohol problems, depression, and anger. Discussion focuses on the overall patterns of results as well as the nuances within these findings. 相似文献
1000.
Jenny K. Rinehart Erica E. Nason Elizabeth A. Yeater Geoffrey F. Miller 《Journal of sex research》2017,54(3):273-283
Institutional review boards (IRBs) have expressed concerns that certain individuals or groups, such as participants who are younger, ethnic minorities, or who have certain psychological or personality traits, may be particularly distressed when participating in “sensitive topics” research. This study examined the effects of several demographic and individual difference factors (i.e., age, sex, ethnicity, religiosity, Big Five personality traits, and baseline psychological distress levels) on reactions to participation in sensitive topics research. Participants were 504 undergraduates who completed an extensive battery of either trauma/sex questionnaires or cognitive tests and rated their positive and negative emotional reactions and the perceived benefits and mental costs of participating. They also compared research participation to normal life stressors. Our findings indicated that individual difference and demographic risk factors do not increase participant distress after participating in sex/trauma research over and above that experienced after participating in traditionally minimal-risk cognitive tasks. Participants generally found research participation less distressing than normal life stressors and even enjoyable. 相似文献