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   241篇
  免费   8篇
管理学   59篇
民族学   6篇
人口学   25篇
丛书文集   1篇
理论方法论   9篇
综合类   2篇
社会学   96篇
统计学   51篇
  2023年   3篇
  2022年   2篇
  2021年   4篇
  2020年   9篇
  2019年   12篇
  2018年   17篇
  2017年   14篇
  2016年   15篇
  2015年   5篇
  2014年   12篇
  2013年   41篇
  2012年   25篇
  2011年   8篇
  2010年   9篇
  2009年   6篇
  2008年   11篇
  2007年   8篇
  2006年   2篇
  2005年   6篇
  2004年   3篇
  2003年   3篇
  2002年   3篇
  2001年   5篇
  2000年   2篇
  1999年   2篇
  1998年   2篇
  1997年   5篇
  1995年   1篇
  1994年   1篇
  1993年   3篇
  1992年   3篇
  1989年   1篇
  1988年   2篇
  1987年   2篇
  1986年   1篇
  1974年   1篇
排序方式: 共有249条查询结果,搜索用时 15 毫秒
61.
The scale-up method estimates the size of hard to count subpopulations. This method is based on the idea that the proportion of subjects in a subpopulation E known to each member of the general population T is the same as the proportion of members of E belonging to general population T.  相似文献   
62.
ABSTRACT

This study describes the process of developing and validating the Sexual Prejudice in Sport Scale (SPSS), which is a multidimensional instrument developed to assess attitudes toward lesbians and gay men (LG) in sports. The authors conducted two studies: first, to establish the factor structure of the SPSS on 297 heterosexual athletes; and, second, to test the reliability and validity of the resulting 19-item scale on a sample of 311 heterosexual and 160 LG athletes. Exploratory factor analysis of an initial item pool yielded three factors: open rejection, which assesses the blatant prejudice expressed toward LG people; denial of visibility, which evaluates attitude toward the coming out of LG people; and gendering performance, which corresponds to gender stereotypes about performance/skills of LG people. A confirmatory factor analysis was conducted to assess the stability of the SPSS. The authors documented internal consistency, test-retest stability, and convergent/divergent validity. Implications and directions for future research are discussed.  相似文献   
63.
On-line process control consists of inspecting a single item for every m (integer and m ≥ 2) produced items. Based on the results of the inspection, it is decided whether the process is in-control (the fraction of conforming items is p 1; State I) or out-of-control (the fraction of conforming items is p 2 < p 1; State II). If the inspected item is non conforming, it is determined that the process is out-of-control, and the production process is stopped for an adjustment; otherwise, production continues. As most designs of on-line process control assume a long-run production, this study can be viewed as an extension because it is concerned with short-run production and the decision regarding the process is subject to misclassification errors. The probabilistic model of the control system employs properties of an ergodic Markov chain to obtain the expression of the average cost of the system per unit produced, which can be minimised as a function of the sampling interval, m. The procedure is illustrated by a numerical example.  相似文献   
64.
Small area estimators are often based on linear mixed models under the assumption that relationships among variables are stationary across the area of interest (Fay–Herriot models). This hypothesis is patently violated when the population is divided into heterogeneous latent subgroups. In this paper we propose a local Fay–Herriot model assisted by a Simulated Annealing algorithm to identify the latent subgroups of small areas. The value minimized through the Simulated Annealing algorithm is the sum of the estimated mean squared error (MSE) of the small area estimates. The technique is employed for small area estimates of erosion on agricultural land within the Rathbun Lake Watershed (IA, USA). The results are promising and show that introducing local stationarity in a small area model may lead to useful improvements in the performance of the estimators.  相似文献   
65.
The method of moments has been widely used as a simple alternative to the maximum likelihood method, mainly because of its efficiency and simplicity in obtaining parameter estimators of a mixture of two binomial distributions. In this paper, an alternative estimate is proposed which is as competitive as of the method of moments when comparing the mean squared error and computational effort.  相似文献   
66.
Super Sunday is a historically Afri-can American carnival that takes place on the weekends surrounding St. Joseph's day ( March 19) .Parade participants wear elaborately beaded and feathered costumes m...  相似文献   
67.
Various approaches to obtaining estimates based on preliminary data are outlined. A case is then considered which frequently arises when selecting a subsample of units, the information for which is collected within a deadline that allows preliminary estimates to be produced. At the moment when these estimates have to be produced it often occurs that, although the collection of data on subsample units is still not complete, information is available on a set of units which does not belong to the sample selected for the production of the preliminary estimates. An estimation method is proposed which allows all the data available on a given date to be used to the full-and the expression of the expectation and variance are derived. The proposal is based on two-phase sampling theory and on the hypothesis that the response mechanism is the result of random processes whose parameters can be suitably estimated. An empirical analysis of the performance of the estimator on the Italian Survey on building permits concludes the work. The Sects. 1,2,3,4 and the technical appendixes have been developed by Giorgio Alleva and Piero Demetrio Falorsi; Sect. 5 has been done by Fabio Bacchini and Roberto Iannaccone. Piero Demetrio Falorsi is chief statisticians at Italian National Institute of Statistics (ISTAT); Giorgio Alleva is Professor of Statistics at University “La Sapienza” of Rome, Fabio Bacchini and Roberto Iannaccone are researchers at ISTAT.  相似文献   
68.
The subjective nature of chronic pain leads to challenges in describing, treating, and accommodating pain. Twenty older women, who engaged in focus groups, and eight of whom also participated in individual interviews, discussed the influence of chronic pain on their perception of self as well as daily functioning. Managing pain forced many of the women to withdraw from social activities that they valued and interfered with sleep patterns, household tasks and recreational activities. Varied acceptance by social network members added to the challenge of adjusting to complications associated with pain. Self-care practices that supported independence contributed to women's perceived success in daily functioning.  相似文献   
69.
70.
At the heart of this article is a structural approach to narrative, based on the work of Propp, Labov, van Dijk, Halliday, and others. The article highlights the structural features of narrative—basically, the organization of the genre around the semantic template actor-action-actor (syntactically rendered as subject-verb-object but where, in narrative, the subject is typically a social actor and the verb a social action) and the modifiers of each element of this triplet, such as time and space of action—and shows how to implement this structure in a computer environment and how to use this methodological tool in socio-historical research (namely, the rise of Italian fascism, 1919–22). But, taking a cue from Halliday’s cover jacket of his An Introduction to Functional Grammar, with its representation of a color circle, the paper takes the reader on an intellectual journey from Newton to Goethe—and the quality versus quantity debate—to Goethe and Propp, to end, back home, with Simmel and Weber.  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