全文获取类型
收费全文 | 28204篇 |
免费 | 677篇 |
国内免费 | 3篇 |
专业分类
管理学 | 3808篇 |
民族学 | 120篇 |
人才学 | 3篇 |
人口学 | 2494篇 |
丛书文集 | 134篇 |
教育普及 | 3篇 |
理论方法论 | 2485篇 |
综合类 | 289篇 |
社会学 | 14033篇 |
统计学 | 5515篇 |
出版年
2023年 | 137篇 |
2021年 | 137篇 |
2020年 | 374篇 |
2019年 | 508篇 |
2018年 | 649篇 |
2017年 | 869篇 |
2016年 | 625篇 |
2015年 | 488篇 |
2014年 | 648篇 |
2013年 | 5253篇 |
2012年 | 827篇 |
2011年 | 764篇 |
2010年 | 611篇 |
2009年 | 536篇 |
2008年 | 619篇 |
2007年 | 616篇 |
2006年 | 623篇 |
2005年 | 600篇 |
2004年 | 502篇 |
2003年 | 472篇 |
2002年 | 516篇 |
2001年 | 677篇 |
2000年 | 656篇 |
1999年 | 618篇 |
1998年 | 467篇 |
1997年 | 407篇 |
1996年 | 465篇 |
1995年 | 465篇 |
1994年 | 480篇 |
1993年 | 455篇 |
1992年 | 490篇 |
1991年 | 504篇 |
1990年 | 514篇 |
1989年 | 446篇 |
1988年 | 486篇 |
1987年 | 416篇 |
1986年 | 392篇 |
1985年 | 429篇 |
1984年 | 451篇 |
1983年 | 390篇 |
1982年 | 319篇 |
1981年 | 263篇 |
1980年 | 267篇 |
1979年 | 318篇 |
1978年 | 270篇 |
1977年 | 225篇 |
1976年 | 200篇 |
1975年 | 184篇 |
1974年 | 181篇 |
1973年 | 160篇 |
排序方式: 共有10000条查询结果,搜索用时 929 毫秒
901.
Proponents of the common factors movement in marriage and family therapy (MFT) suggest that, rather than specific models of therapy, elements common across models of therapy and common to the process of therapy itself are responsible for therapeutic change. This article-the second of two companion articles-reports on a study designed to further investigate common factors in couple therapy. We used grounded theory techniques to analyze data from interviews with MFT model developers Dr. Susan M. Johnson, Dr. Frank M. Dattilio, Dr. Richard C. Schwartz, former students of Dr. Johnson and Dr. Schwartz, and each of their clients who had been successful in couple therapy. This article reports model-independent variables, that is, general aspects of therapy that are not directly related to the therapist's model. Model-independent categories include client variables, therapist variables, the therapeutic alliance, therapeutic process, and expectancy and motivational factors, each with several subcategories. We also present a conceptual framework that outlines how model-dependent and model-independent common factors may interact to produce change. We discuss our findings and proposed framework in relation to the current common factors literature in psychology and MFT. We also discuss clinical, training, and research implications. 相似文献
902.
Communities across the nation have become increasingly concerned about inhalant use and use of harmful legal products among youth because of increasing prevalence rates and deleterious health consequences from abusing these products. The increasing concern of communities about inhaling and ingesting legal products has been coupled with increasing awareness and concern about ability of youth to access and abuse a variety of other legal retail products. There are few examples of scientifically designed community prevention projects that seek to reduce youth abuse of such legal products. This article describes a community prevention trial that is designed to reduce sales of inhalants and other harmful legal products to youth and demonstrates how the retailer component of the trial can be rigorously evaluated. It also shows how data from youth purchase attempts can complement survey data from retailers. 相似文献
903.
Louis A. Penner Heather Orom Terrance L. Albrecht Melissa M. Franks Tanina S. Foster John C. Ruckdeschel 《Journal of Nonverbal Behavior》2007,31(2):99-117
Video recording provides an objective record of the content of medical interactions. However, there is concern that cameras
may be reactive measurement devices that alter what normally transpires during interactions. This study addressed potential
reactivity of cameras in medical interactions. Interactions between 45 patients and 14 medical oncologists were video recorded
and coded for camera-related behaviors. Eleven of 45 patients performed none of the behaviors. Among the other patients, camera-related
behaviors were infrequent and, on average, constituted about 0.1% (one-tenth of one percent) of total interaction time. Behaviors
occurred most often in very early stages of interactions, and when physicians were absent from the room. Seven physicians
showed camera-related behaviors, comprising less than 0.1% of the time they were in the interaction. Results suggest video
recording can provide nonreactive means of studying medical interactions.
相似文献
Louis A. PennerEmail: |
904.
905.
In recent years, a variety of regression models, including zero-inflated and hurdle versions, have been proposed to explain the case of a dependent variable with respect to exogenous covariates. Apart from the classical Poisson, negative binomial and generalised Poisson distributions, many proposals have appeared in the statistical literature, perhaps in response to the new possibilities offered by advanced software that now enables researchers to implement numerous special functions in a relatively simple way. However, we believe that a significant research gap remains, since very little attention has been paid to the quasi-binomial distribution, which was first proposed over fifty years ago. We believe this distribution might constitute a valid alternative to existing regression models, in situations in which the variable has bounded support. Therefore, in this paper we present a zero-inflated regression model based on the quasi-binomial distribution, taking into account the moments and maximum likelihood estimators, and perform a score test to compare the zero-inflated quasi-binomial distribution with the zero-inflated binomial distribution, and the zero-inflated model with the homogeneous model (the model in which covariates are not considered). This analysis is illustrated with two data sets that are well known in the statistical literature and which contain a large number of zeros. 相似文献
906.
907.
908.
The utility of postcensal population estimates depends on the adequate measurement of four major components of demographic change: fertility, mortality, immigration, and emigration. Of the four components, emigration, especially of the foreign-born, has proved the most difficult to gauge. Without "direct" methods (i.e., methods identifying who emigrates and when), demographers have relied on indirect approaches, such as residual methods. Residual estimates, however are sensitive to inaccuracies in their constituent parts and are particularly ill-suited for measuring the emigration of recent arrivals. Here we introduce a new method for estimating foreign-born emigration that takes advantage of the sample design of the Current Population Survey (CPS): repeated interviews of persons in the same housing units over a period of 16 months. Individuals appearing in a first March Supplement to the CPS but not the next include those who died in the intervening year, those who moved within the country, and those who emigrated. We use statistical methods to estimate the proportion of emigrants among those not present in the follow-up interview. Our method produces emigration estimates that are comparable to those from residual methods in the case of longer-term residents (immigrants who arrived more than 10 years ago), but yields higher--and what appear to be more accurate--estimates for recent arrivals. Although somewhat constrained by sample size, we also generate estimates by age, sex, region of birth, and duration of residence in the United States. 相似文献
909.
910.
Weiss MD 《Journal of homosexuality》2006,50(2-3):103-132
This article explores nonpractitioners' understandings of and responses to the increasingly mainstream representation of BDSM in U.S. media, focusing on the film Secretary (Shainberg, 2002). Survey, focus group, and interview data indicate that popular images of SM promote the acceptance and understanding of sexual minorities through two mechanisms: acceptance via normalization, and understanding via pathologizing. Rather than challenging the privileged status of normative sexuality, these mechanisms reinforce boundaries between protected/privileged and policed/pathological sexualities. Instead of celebrating increased representation, this article argues that political energy might be directed toward the desire that the popularity of BDSM representations signifies: the desire to encounter authentic, undisciplined, and noncommodified representations that would transgress the sexual norms of American postmodern consumer culture. 相似文献