全文获取类型
收费全文 | 29297篇 |
免费 | 517篇 |
专业分类
管理学 | 3600篇 |
民族学 | 146篇 |
人才学 | 7篇 |
人口学 | 2666篇 |
丛书文集 | 173篇 |
教育普及 | 4篇 |
理论方法论 | 2705篇 |
现状及发展 | 1篇 |
综合类 | 552篇 |
社会学 | 14562篇 |
统计学 | 5398篇 |
出版年
2023年 | 144篇 |
2021年 | 151篇 |
2020年 | 451篇 |
2019年 | 634篇 |
2018年 | 664篇 |
2017年 | 944篇 |
2016年 | 691篇 |
2015年 | 541篇 |
2014年 | 647篇 |
2013年 | 4860篇 |
2012年 | 960篇 |
2011年 | 847篇 |
2010年 | 642篇 |
2009年 | 633篇 |
2008年 | 706篇 |
2007年 | 739篇 |
2006年 | 647篇 |
2005年 | 723篇 |
2004年 | 674篇 |
2003年 | 613篇 |
2002年 | 619篇 |
2001年 | 722篇 |
2000年 | 639篇 |
1999年 | 639篇 |
1998年 | 479篇 |
1997年 | 446篇 |
1996年 | 470篇 |
1995年 | 434篇 |
1994年 | 434篇 |
1993年 | 398篇 |
1992年 | 483篇 |
1991年 | 485篇 |
1990年 | 425篇 |
1989年 | 445篇 |
1988年 | 408篇 |
1987年 | 376篇 |
1986年 | 371篇 |
1985年 | 390篇 |
1984年 | 415篇 |
1983年 | 408篇 |
1982年 | 320篇 |
1981年 | 273篇 |
1980年 | 291篇 |
1979年 | 313篇 |
1978年 | 261篇 |
1977年 | 243篇 |
1976年 | 211篇 |
1975年 | 203篇 |
1974年 | 181篇 |
1973年 | 156篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Mark A. Hager Ph.D. 《Nonprofit management & leadership》2017,27(3):295-298
992.
Using an Acculturation‐Stress‐Resilience Framework to Explore Latent Profiles of Latina/o Language Brokers 下载免费PDF全文
Jennifer A. Kam Katerina M. Marcoulides Andy J. Merolla 《Journal of research on adolescence》2017,27(4):842-861
With survey data from 243 Latina/o early adolescent language brokers, latent profile analyses were conducted to identify different types (i.e., profiles) of brokers. Profiles were based on how often Latina/o early adolescents brokered for family members, as well as their levels of family‐based acculturation stress, negative brokering beliefs, parentification, and positive brokering beliefs. Three brokering profiles emerged: (1) infrequent‐ambivalents, (2) occasional‐moderates, and (3) parentified‐endorsers. Profile membership was significantly predicted by ethnic identification and brokering in a medical context. Respect, brokering at school, and brokering at home did not significantly predict profile membership. In addition, parentified‐endorsers had more frequent perceived ethnic/racial discrimination and depressive symptoms than other profiles. In contrast, infrequent‐ambivalents engaged in risky behaviors less frequently than other profiles. 相似文献
993.
Molly R. Wolf Rebecca K. Eliseo-Arras Megan Brenner Thomas H. Nochajski 《Journal of Family Social Work》2017,20(1):26-40
ABSTRACTMilitary families face not only the same challenges as other families, but also unique issues due to their military involvement. Parenting programs for civilian families can be helpful, but they do not generally cover the specific issues faced by military families. The purpose of this qualitative study was to gather information from a focus group of eight service providers about the types of issues that affect military families, such that content and delivery of workshops at a social service agency could be formed to specifically cater to military families. This study utilized a phenomenological approach, and analyses revealed areas for social service involvement around the cycle of deployment. Specifically, social services could be helpful by using psychoeducational and normalization techniques around the five major themes that resulted from this study: (1) the issues of servicemembers psychologically withdrawing before deployment, (2) family cohesion and connectedness during and after deployment, (3) family stability during reintegration of the service member, (4) military families experience many of the same challenges that nonmilitary families do (such as domestic violence and financial issues), and (5) utilizing a military culture framework for all military family programs. 相似文献
994.
Adolescent Conflict Appraisals Moderate the Link Between Marital Conflict and Physiological Stress Reactivity 下载免费PDF全文
Rachel G. Lucas‐Thompson Erika S. Lunkenheimer Douglas A. Granger 《Journal of research on adolescence》2017,27(1):173-188
The goal of this study was to advance understanding of how adolescent conflict appraisals contribute uniquely, and in combination with interparental conflict behavior, to individual differences in adolescent physiological reactivity. Saliva samples were collected from 153 adolescents (52% female; ages 10–17 years) before and after the Trier Social Stress Test. Saliva was assayed for cortisol and alpha‐amylase. Results revealed interactive effects between marital conflict and conflict appraisals. For youth who appraised parental conflict negatively (particularly as threatening), negative marital conflict predicted dampened reactivity; for youth who appraised parental conflict less negatively, negative marital conflict predicted heightened reactivity. These findings support the notion that the family context and youth appraisals of family relationships are linked with individual differences in biological sensitivity to context. 相似文献
995.
Cultivating Conformists or Raising Rebels? Connecting Parental Control and Autonomy Support to Adolescent Delinquency 下载免费PDF全文
Jonathan R. Brauer 《Journal of research on adolescence》2017,27(2):452-470
This study investigates short‐term and long‐term associations between parenting in early adolescence and delinquency throughout adolescence using data from the National Longitudinal Surveys. Multilevel longitudinal Poisson regressions show that behavioral control, psychological control, and decision‐making autonomy in early adolescence (ages 10–11) are associated with delinquency trajectories throughout adolescence (ages 10–17). Path analyses reveal support for three mediation hypotheses. Parental monitoring (behavioral control) is negatively associated with delinquency in the short term and operates partly through changes in self‐control. Parental pressure (psychological control) shows immediate and long‐lasting associations with delinquency through changes in self‐control and delinquent peer pressures. Decision‐making autonomy is negatively associated with delinquency in the long term, yet may exacerbate delinquency in early adolescence by increasing exposure to delinquent peers. 相似文献
996.
David A. Weisenhorn Laura M. Frey Jason D. Hans Julie Cerel 《Journal of Family Social Work》2017,20(1):41-51
ABSTRACTNumerous mental health disorders plague our veterans when they return from deployment including anxiety and depressive disorders, which have been linked to elevated suicide risk when left untreated. Family factors, such as parenthood status, may serve as a protective factor against these mental health issues. This study examined the role of parenthood status of male veterans (N = 234) based on age of the child in order to determine whether a child’s age (minor children v. adult children) affects the likelihood of meeting diagnosis criteria for anxiety, depression, and suicide ideation after controlling for marital status. Three hierarchical binary logistic regression models were constructed to assess the predictive influence of children 18 years old and younger, children older than 18, and no children with the results indicating that parenthood status did meaningfully enhance the prediction of suicide ideation. Complete findings, clinical implications, and future considerations are discussed. 相似文献
997.
Catherine A. Manly Ryan S. Wells Genia M. Bettencourt 《Journal of Family and Economic Issues》2017,38(3):421-438
This study explores the conversion of cultural capital into economic capital, and specifically financial capital in the form of parental financial planning for children’s college education, including reported financial preparations and savings. Using data from the Education Longitudinal Study (ELS:2002), logistic regression-based analyses of aspects of cultural capital indicated that parental involvement exhibited the most prevalent relationship with financial planning and the amount saved, and that parents’ expectations, but not their aspirations, corresponded to engagement in financial planning. Findings support the conclusion that some parents convert part of their cultural capital to financial capital in preparation for paying for their child’s college education, perhaps representing a typically hidden facet of social class reproduction. 相似文献
998.
Financial capability—financial knowledge, skills, and access to financial services—may help smooth transitions to adulthood for youth and is affected by socialization experiences with parents and other family members. Among a sample of youth and their parents enrolled in the YouthSave experiment in Ghana (n?=?4,065), this study examined whether physical access to financial services and/or visiting banks with parents or other family members was associated with youth’s perceptions and understanding of financial institutions. We found a statistically significant association between visiting the bank with a parent or other family member and youth’s attitudes (β?=?1.45, p?<?0.001) and understanding of financial services (β?=?2.96, p?<?0.001), controlling for other factors like household income and assets. Conversely, physical access (distance, travel time) was not associated with financial services attitudes or understanding. Parents may play an important role in introducing their children to financial services. Practitioners and policy makers should consider ways to include parents in efforts to promote financial capability among youth. 相似文献
999.
Urban forests provide valuable ecosystem services, but their long-term viability is often threatened by low tree recruitment due to seed and/or microsite limitation. Distinguishing between these two causes of low recruitment has important management implications, but has been little studied in urban environments. We tested for seed and microsite limitation in an urban forested park in Seattle, Washington, USA by adding conifer tree seeds and seedlings to experimental plots in which we manipulated microsite conditions by removing invasive ivy (Hedera spp.) and adding deadwood. We found that natural seed production was low, and adding seeds increased the number of observed seedlings. Furthermore, adding deadwood increased seedling survival, whereas removing Hedera did not have strong effects. Seed limitation is frequently addressed through management actions such as sowing seeds and transplanting seedlings, and our results suggest that such actions address a critical barrier to tree recruitment in urban forests. However, we also observed strong microsite limitation. At our study site, microsite limitation can be addressed primarily by adding deadwood and retaining coarse woody debris on site. Addressing microsite limitation may be a critical component of successful management efforts to improve tree recruitment in urban forests, and should not be overlooked. Furthermore, our study highlights the need for active monitoring and data analysis alongside management, since the most apparent threat (widespread cover of an invasive plant in this case) may not be the primary limit on suitable microsite conditions. 相似文献
1000.
Stanislas Talaga Olivier Dézerald Alexis Carteron Céline Leroy Jean-François Carrias Régis Céréghino Alain Dejean 《Urban Ecosystems》2017,20(5):1001-1009
Due to habitat fragmentation, resource disruption and pollution, urbanization is one of the most destructive forms of anthropization affecting ecosystems worldwide. Generally, human-mediated perturbations dramatically alter species diversity in urban sites compared to the surroundings, thus influencing the functioning of the entire ecosystem. We investigated the taxonomic and functional diversity patterns of the aquatic macroinvertebrate communities in tank bromeliads by comparing those found in a small Neotropical city with those from an adjacent rural site. Changes in the quality of detrital inputs in relation to lower tree diversity and the presence of synanthropic species are likely important driving forces behind the observed structural changes in the urban site. Leaf-litter processors (i.e., shredders, scrapers) were positively affected in the urban site, while filter-feeders that process smaller particles produced by the activity of the shredders were negatively affected. Because we cannot ascertain whether the decline in filter-feeders is related to food web-mediated effects or to competitive exclusion (Aedes aegypti mosquitoes were present in urban bromeliads only), further studies are necessary to account for the effects of intra-guild competition or inter-guild facilitation. 相似文献