首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1238篇
  免费   55篇
管理学   107篇
民族学   4篇
人口学   111篇
丛书文集   3篇
理论方法论   144篇
综合类   20篇
社会学   582篇
统计学   322篇
  2023年   13篇
  2022年   9篇
  2021年   11篇
  2020年   40篇
  2019年   62篇
  2018年   61篇
  2017年   57篇
  2016年   52篇
  2015年   30篇
  2014年   27篇
  2013年   295篇
  2012年   56篇
  2011年   45篇
  2010年   39篇
  2009年   34篇
  2008年   32篇
  2007年   34篇
  2006年   27篇
  2005年   21篇
  2004年   20篇
  2003年   18篇
  2002年   11篇
  2001年   26篇
  2000年   21篇
  1999年   24篇
  1998年   20篇
  1997年   19篇
  1996年   20篇
  1995年   15篇
  1994年   19篇
  1993年   14篇
  1992年   20篇
  1991年   16篇
  1990年   6篇
  1989年   9篇
  1988年   3篇
  1987年   7篇
  1986年   7篇
  1985年   8篇
  1984年   8篇
  1983年   5篇
  1981年   5篇
  1980年   4篇
  1979年   3篇
  1978年   4篇
  1977年   2篇
  1975年   3篇
  1974年   2篇
  1973年   3篇
  1966年   2篇
排序方式: 共有1293条查询结果,搜索用时 15 毫秒
161.
162.
This paper discusses the editing procedures for a survey on family formation conducted in Melbourne during 1971. Examples are given of the incidence and types of inconsistencies revealed during the editing stage in the mainly quantitative variables concerning childbearing, numbers of children, and the demographic characteristics of the children. The principal point emphasized is the need for automatic detection and manual correction of coding deficiencies in a survey of this type, i.e. an intensive, “once-off” survey, with a sample size of a few thousand, from which detailed and complex analyses are planned.  相似文献   
163.
Major findings from this analysis of the data gathered in preparation for the 1966 and 1981 surveys of children's residential group care facilities are as follows below. In the field of residential care of pregnant adolescents, it appears that, despite an increase in the number of births to adolescent mothers since 1966, the preferred mode of serving this population is no longer residential group care. While there has been a small increase (6 facilities) in the number of residential facilities for pregnant adolescents that operate under public auspices, the 49% decrease in facilities under private auspices is the real indicator of the direction of residential services to pregnant adolescents since 1965. In the Child Welfare Stream, the most notable change between 1965 and 1981 was the decrease in the relative proportion of residential group care facilities for dependent, neglected, or abused children and youth. Overall, child welfare facilities accounted for 55% of all residential facilities listed for survey in 1965; in 1981 this percentage had fallen to 37%. As in 1965 the Child Welfare Stream was dominated by the private sector in 1981, with 83% of all child welfare facilities operating under private auspices. This pattern was found for most of the 50 individual states as well. In the Juvenile Justice Stream, the overall increase of 154% in the number of residential facilities since the 1965 listing is due in part to a notable increase in the number of private facilities in this stream of care. Although the majority of juvenile justice facilities are still public, there has been an increase of 17% since 1965 in the proportion of facilities under private auspices. An even greater increase in total number of facilities than was seen in the Juvenile Justice Stream is seen in the mental health field between 1965 and 1981. There were almost four times as many residential mental health facilities listed for survey in 1981 as in 1965. From representing about one-eighth of the total number of all residential group care facilities for children and youth with special problems or needs, the Mental Health Stream increased to a quarter of all such facilities by 1981. As in the earlier study, the Mental Health Stream was dominated by the private sector in 1981. The proportion of mental health facilities under private auspices had increased by 16% since 1965, indicating an even greater involvement of the private sector in the delivery of residential mental health services to children and youth.(ABSTRACT TRUNCATED AT 400 WORDS)  相似文献   
164.
The reflecting (R.T.) team is examined within its theoretical, therapeutic and training contexts. A distinction is made between the reflecting team technique (R.T.T.) and the reflecting team process (R.T.P.), in order to explore whether or not the practice of team reflection is consistent with the requirements of the second order family therapies, the theoretical development which supported the R.T.'s emergence and subsequent popularity. The critique of the R.T.P. suggests that although this therapeutic process does represent attempts towards increasing acceptance of complexity, reduced attempts to control, collaboration, interconnectedness and contextual respect, there is little room for complacency either theoretically or practically.  相似文献   
165.
Korean society has recently experienced rapid increases in household debt and divorce rates. This study investigates whether household debt and debt ratios lower marital stability and increase the probability of divorce among Korean families. Six-year panels from the Korean Labor and Income Panel Study (KLIPS) household surveys were used for analysis. The effect of household debt upon the probability of divorce was estimated through pooled and population-averaged Logit models. The results suggest that household financial strain measured by the amount of household debt and the debt-to-income ratios does not significantly affect the probability of divorce. This finding contradicts the widespread notion that households’ excessive borrowing has been partially responsible for the recent increase in divorce rates in Korea.
Ki Young LeeEmail:
  相似文献   
166.
Studies of the prevalence of pathological gambling (PG) in psychiatric and substance abusing patients suggest that the disorder is not rare. Most studies have been of substance abusers in treatment, and the rate of PG has been found to be several times higher than the rate found in community based epidemiological surveys. However, only one study has examined the prevalence of PG in a heterogeneous sample of patients, and this was a study of psychiatric inpatients. We are not aware of any prior study of the prevalence of PG in a psychiatric outpatient sample. In the present report from the Rhode Island Methods to Improve Diagnosis and Services (MIDAS) project we examined the current and lifetime prevalence of PG in 1,709 psychiatric outpatients interviewed with a semi-structured diagnostic interview that included a module to diagnose DSM-IV PG. Forty (2.3%) patients had a lifetime history of DSM-IV PG, all of whom had at least one other DSM-IV axis I disorder. Patients with PG had significantly more axis I disorders than patients without PG, and had significantly higher rates of bipolar disorder, social phobia, panic disorder with agoraphobia, alcohol use disorder, and other impulse control disorders. Possible reasons for the low prevalence of PG in our sample are discussed.  相似文献   
167.
This paper describes procedure for constructing a vector of regression weights. Under the regression superpopulation model, the ridge regression estimator that has minimum model mean squared error is derived. Through a simulation study, we compare the ridge regression weights, regression weights, quadratic programming weights, and raking ratio weights. The ridge regression procedure with weights bounded by zero performed very well.  相似文献   
168.
Wilks’ ratio statistic can be defined in terms of the ratio of the sample generalized variances of two non-independent estimators of the same covariance matrix. Recently this statistic has been proposed as a control statistic for monitoring changes in the covariance matrix of a multivariate normal process in a Phase II situation, particularly when the dimension is larger than the sample size. In this article we derive a technique for decomposing Wilks’ ratio statistic into the product of independent factors that can be associated with the components of the covariance matrix. With these results, we demonstrate that, when a signal is detected in a control procedure for the Phase II monitoring of process variability using the ratio statistic, the signaling value can be decomposed and the process variables contributing to the signal can be specifically identified.  相似文献   
169.
A control procedure is presented in this article that is based on jointly using two separate control statistics in the detection and interpretation of signals in a multivariate normal process. The procedure detects the following three situations: (i) a mean vector shift without a shift in the covariance matrix; (ii) a shift in process variation (covariance matrix) without a mean vector shift; and (iii) both a simultaneous shift in the mean vector and covariance matrix as the result of a change in the parameters of some key process variables. It is shown that, following the occurrence of a signal on either of the separate control charts, the values from both of the corresponding signaling statistics can be decomposed into interpretable elements. Viewing the two decompositions together helps one to specifically identify the individual components and associated variables that are being affected. These components may include individual means or variances of the process variables as well as the correlations between or among variables. An industrial data set is used to illustrate the procedure.  相似文献   
170.
Li et al. (2007 Li, Y., Liu, Y., Zhu, J. (2007). Quantile regression in reproducing kernel Hilbert spaces. J. Amer. Statist. Assoc. 102:255268.[Taylor & Francis Online], [Web of Science ®] [Google Scholar]) developed an estimation method for quantile functions in a reproducing kernel Hilbert space for complete data, and Park and Kim (2011 Park, J., Kim, J. (2011). Quantile regression with an epsilon-insensitive loss in a reproducing kernel Hilbert space. Statist. Probab. Lett. 81:6270.[Crossref], [Web of Science ®] [Google Scholar]) proposed an estimation method using the ε-insensitive loss. This article extends these estimation methods to left-truncated and right-censored data. As a measure of goodness of fit, the check loss and the ε-insensitive loss were used to estimate the quantile function. The ε-insensitive loss can shrink the estimated coefficients toward zero; hence, it can reduce the variability of the estimates. Simulation studies show that the estimated quantile functions based on the ε-insensitive loss perform slightly better when ε is adequately chosen.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号