全文获取类型
收费全文 | 7045篇 |
免费 | 223篇 |
专业分类
管理学 | 1145篇 |
民族学 | 57篇 |
人才学 | 5篇 |
人口学 | 594篇 |
丛书文集 | 48篇 |
理论方法论 | 721篇 |
综合类 | 47篇 |
社会学 | 3600篇 |
统计学 | 1051篇 |
出版年
2023年 | 42篇 |
2021年 | 39篇 |
2020年 | 116篇 |
2019年 | 176篇 |
2018年 | 169篇 |
2017年 | 219篇 |
2016年 | 196篇 |
2015年 | 164篇 |
2014年 | 170篇 |
2013年 | 1233篇 |
2012年 | 212篇 |
2011年 | 208篇 |
2010年 | 195篇 |
2009年 | 170篇 |
2008年 | 238篇 |
2007年 | 215篇 |
2006年 | 187篇 |
2005年 | 233篇 |
2004年 | 184篇 |
2003年 | 190篇 |
2002年 | 212篇 |
2001年 | 161篇 |
2000年 | 139篇 |
1999年 | 138篇 |
1998年 | 117篇 |
1997年 | 104篇 |
1996年 | 85篇 |
1995年 | 99篇 |
1994年 | 110篇 |
1993年 | 98篇 |
1992年 | 80篇 |
1991年 | 96篇 |
1990年 | 86篇 |
1989年 | 73篇 |
1988年 | 96篇 |
1987年 | 97篇 |
1986年 | 53篇 |
1985年 | 88篇 |
1984年 | 87篇 |
1983年 | 88篇 |
1982年 | 65篇 |
1981年 | 56篇 |
1980年 | 45篇 |
1979年 | 47篇 |
1978年 | 55篇 |
1977年 | 47篇 |
1976年 | 51篇 |
1975年 | 40篇 |
1974年 | 34篇 |
1973年 | 28篇 |
排序方式: 共有7268条查询结果,搜索用时 265 毫秒
981.
982.
Although collaboration in child abuse investigations has been emphasized since 1974, barriers, including role conflicts and organizational differences, have often been reported. This study describes the process of collaboration based on the perceptions of investigators working with a Child Advocacy Center. Telephone interviews were conducted with 290 child protective service workers and law enforcement officers from 28 child advocacy centers in 20 different states. Respondents identified barriers to the process of collaboration such as conflicts over case control and facilitators including co-housing and cross-training. Conditions that should contribute to successful collaboration are discussed. 相似文献
983.
In this case study, we describe a patient with a dementia due to a brain tumor. This unusual cause of dementia illustrates the importance of a thorough evaluation of anyone who experiences relatively sudden changes in cognitive functions. The disorder had features common to other dementias but also had some unusual attributes that made a diagnosis of neurodegenerative disease less likely. Common features included intellectual decline involving difficulties in word-finding, the occurrence of paraphasia, poor concentration, disorientation in familiar environments, problems performing routine complex tasks, and elements of social withdrawal. Unlike more common degenerative dementias, however, there was no marked memory involvement. In addition, the onset of illness was rapid and associated with headaches, incontinence, and some gait and motor dysfunction. 相似文献
984.
Using the data from the AIDS Link to Intravenous Experiences cohort study as an example, an informative censoring model was
used to characterize the repeated hospitalization process of a group of patients. Under the informative censoring assumption,
the estimators of the baseline rate function and the regression parameters were shown to be related to a latent variable.
Hence, it becomes impractical to directly estimate the unknown quantities in the moments of the estimators for the bandwidth
selection of a smoothing estimator and the construction of confidence intervals, which are respectively based on the asymptotic
mean squared errors and the asymptotic distributions of the estimators. To overcome these difficulties, we develop a random
weighted bootstrap procedure to select appropriate bandwidths and to construct approximated confidence intervals. One can
see that our method is simple and faster to implement from a practical point of view, and is at least as accurate as other
bootstrap methods. In this article, it is shown that the proposed method is useful through the performance of a Monte Carlo
simulation. An application of our procedure is also illustrated by a recurrent event sample of intravenous drug users for
inpatient cares over time. 相似文献
985.
986.
John?C.?Butler James?S.?DyerEmail author Jiammin?Jia 《Journal of Risk and Uncertainty》2005,30(2):133-156
Do participants make decisions consistent with risk-value tradeoffs? One hundred and five undergraduate business students made risk and preference judgments about lottery pairs in a series of paper surveys. The data indicate that the participants’ responses were generally consistent with the key assumptions of risk-value models, but that some extensions of the theory would improve this consistency. In particular, we find that modifying the risk assumptions of the risk-value theory so they are consistent the concept of the reflection of the risk attitude in the domains of gains and losses increases the agreement between the theory and the participants’ responses. 相似文献
987.
988.
The present outcome study is a preliminary report on whether personality changes occur in parents receiving behavioral family therapy. Behavioral techniques for changing the identified patient's presenting problem were taught to the parents and each family member was given a weekly behavioral homework assignment intended to change the dysfunctional interactions assessed in the family.
An analysis of pre and post measures using Cattell's 16PF questionnaire showed a significant decrease in the parent's self-sufficiency index, indicating increased group dependence. The mean number of sessions was 12.6. The results of this study raise questions about the nature of the personality changes occurring in family therapy of this type. Family therapists, often-times assuming the role of the "expert" for the family, may be unwittingly fostering group dependence and losses in confidence for parents receiving such family guidance. 相似文献
An analysis of pre and post measures using Cattell's 16PF questionnaire showed a significant decrease in the parent's self-sufficiency index, indicating increased group dependence. The mean number of sessions was 12.6. The results of this study raise questions about the nature of the personality changes occurring in family therapy of this type. Family therapists, often-times assuming the role of the "expert" for the family, may be unwittingly fostering group dependence and losses in confidence for parents receiving such family guidance. 相似文献
989.
990.