全文获取类型
收费全文 | 19129篇 |
免费 | 365篇 |
专业分类
管理学 | 2301篇 |
民族学 | 108篇 |
人才学 | 7篇 |
人口学 | 1775篇 |
丛书文集 | 109篇 |
教育普及 | 2篇 |
理论方法论 | 1775篇 |
现状及发展 | 1篇 |
综合类 | 242篇 |
社会学 | 9549篇 |
统计学 | 3625篇 |
出版年
2023年 | 94篇 |
2022年 | 81篇 |
2021年 | 101篇 |
2020年 | 296篇 |
2019年 | 484篇 |
2018年 | 484篇 |
2017年 | 674篇 |
2016年 | 486篇 |
2015年 | 382篇 |
2014年 | 457篇 |
2013年 | 3226篇 |
2012年 | 682篇 |
2011年 | 591篇 |
2010年 | 476篇 |
2009年 | 456篇 |
2008年 | 514篇 |
2007年 | 510篇 |
2006年 | 467篇 |
2005年 | 438篇 |
2004年 | 433篇 |
2003年 | 395篇 |
2002年 | 412篇 |
2001年 | 481篇 |
2000年 | 392篇 |
1999年 | 393篇 |
1998年 | 318篇 |
1997年 | 289篇 |
1996年 | 296篇 |
1995年 | 284篇 |
1994年 | 265篇 |
1993年 | 257篇 |
1992年 | 297篇 |
1991年 | 295篇 |
1990年 | 262篇 |
1989年 | 262篇 |
1988年 | 247篇 |
1987年 | 226篇 |
1986年 | 222篇 |
1985年 | 249篇 |
1984年 | 237篇 |
1983年 | 234篇 |
1982年 | 180篇 |
1981年 | 158篇 |
1980年 | 173篇 |
1979年 | 169篇 |
1978年 | 141篇 |
1977年 | 140篇 |
1976年 | 125篇 |
1975年 | 115篇 |
1974年 | 97篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
Condom Use Trajectories in Adolescence and the Transition to Adulthood: The Role of Mother and Father Support 总被引:1,自引:0,他引:1
Pingel ES Bauermeister JA Elkington KS Fergus S Caldwell CH Zimmerman MA 《Journal of research on adolescence》2012,22(2):350-366
Few studies have investigated how mother and father support differ on predicting youths' sexual risk behavior. We therefore examined the influence of parental support on condom use trajectories and its correlates in a predominantly African American sample [(N=627; 53% female; M = 14.86 years (SD=. 64)] from adolescence to young adulthood. We used hierarchical growth curve modeling to examine the relationship between condom use, substance use, psychological distress and parental support prospectively. We found that consistent condom use decreased over time and was associated negatively with psychological distress and substance use. Furthermore, both maternal and paternal support were associated with more condom use over time. We discuss the implications of our findings for HIV prevention programs. 相似文献
972.
Weatherly JN Miller JC Montes KS Rost C 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2012,28(2):217-223
Dixon and Johnson (Anal Gambl Behav 1: 44–49, 2007) proposed the Gambling Functional Assessment as a tool to identify the consequences maintaining the respondent’s gambling
behavior, but subsequent studies on its psychometric properties suggested that it could use improvement. The present study
investigated the internal consistency of the Gambling Functional Assessment—Revised using the responses of 1,060 undergraduate
students. Temporal reliability was assessed by a second administration of the measure four (n = 87) or twelve (n = 98) weeks after the first administration. Temporal reliability was also compared to the South Oaks Gambling Screen (Lesieur
and Blume in Am J Psychiatry 144: 1184–1188, 1987), which was also administered at both time points. Internal consistency measures were good to excellent, even when potential
non-gamblers were excluded from the analyses. Temporal stability was also very good, with the possible exception of the consequence
of “escape” at 12 weeks. The Gambling Functional Assessment—Revised represents a potentially useful tool for researchers and
therapists interested in why respondents are gambling. 相似文献
973.
Suurvali H Hodgins DC Toneatto T Cunningham JA 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2012,28(2):273-296
A random digit dialing telephone survey was used to interview 8,467 adults in Ontario, Canada. The NODS-CLiP was used to identify
a representative sample of 730 gamblers (54.3% male, mean age 45.3 years) with possible past year gambling problems in order
to explore factors that might affect disordered gamblers’ motivators for seeking gambling-related help. A final sample of
526 gamblers provided useable data on possible reasons for and barriers to seeking help, awareness of services, self-perception
of gambling problems and experience with help-seeking. Financial and relationship issues were the most frequently volunteered
motivators. However, over two-thirds of the respondents could not think of a reason for seeking help. Gamblers who had self-admitted
or more severe problems, who knew how to get help, who were employed and had more education, and who identified possible barriers
to seeking help were more likely to suggest motivators, especially financial ones. More research is recommended on gamblers’
trajectory towards recognition of a gambling problem, the process of overcoming specific barriers to treatment, and the role
of social advantage (e.g., education and employment), in order to devise educational campaigns that will encourage earlier
help-seeking among disordered gamblers. 相似文献
974.
975.
The problems related to the means of transport in urban Brazilians have been getting worse over the years. The increase of the fleet, to the detriment of the adequacy and extent of the road network of cities contributes to this fact. This paper presents a profile of users of cycling in the city of Juiz de Fora, and thus contributes to the study of sustainable urban mobility, providing researchers with information that can guide the search for the encouragement of the use of means of transport to meet environmental needs urban centers that contributes to social equity. 相似文献
976.
This paper presents a multivariate method to assess the comprehension of safety signs. The proposed method uses the MDS and Procrustes, to obtain a consensus perceptual map. The results show that the map allowed discriminating signs with high levels of comprehension from others. The safety signs have no statistical difference as depicted by Bootstrap Analysis. 相似文献
977.
978.
979.
The aim is to identify ergonomic intervention methods used for including people with disabilities (PD) in the Brazilian labor market, with emphasis on discussion of methods to analyze the fit between the worker and the workplace. Methods to evaluate the fit of the worker to the workplace identify the capabilities and limitations of PDs and the demands of work, combining these data, and comparing them, in order to obtain a detailed analysis of the fit were drawn from national and international publications. These show that the use of specific methods for PDs and others focused on the general population. Mutatis mutandis, there is a need for complementary tools to address this segment. Thus, for the Brazilian scenario, it is essential to develop specific methodological tools to assess the capabilities of a PD so that they may better interact with their job. 相似文献
980.
This paper presents an assessment with simulated activities with the aim of analyzing the perception of ease / difficulty of the use of faucets (taps) handles by 180 Brazilian adults. Five different handles faucets were activated for subsequent collection of perceptual data. The procedures were based on main recommendations for biomedical ethics and human research. The results indicate that handles with levers are significantly (p ≤ 0.05) easier to use. The most difficult are characterized by not having support points for the rotation (levers) or more points of pressure concentration in the hand. 相似文献