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61.
Simple nonparametric estimates of the conditional distribution of a response variable given a covariate are often useful for
data exploration purposes or to help with the specification or validation of a parametric or semi-parametric regression model.
In this paper we propose such an estimator in the case where the response variable is interval-censored and the covariate
is continuous. Our approach consists in adding weights that depend on the covariate value in the self-consistency equation
proposed by Turnbull (J R Stat Soc Ser B 38:290–295, 1976), which results in an estimator that is no more difficult to implement
than Turnbull’s estimator itself. We show the convergence of our algorithm and that our estimator reduces to the generalized
Kaplan–Meier estimator (Beran, Nonparametric regression with randomly censored survival data, 1981) when the data are either
complete or right-censored. We demonstrate by simulation that the estimator, bootstrap variance estimation and bandwidth selection
(by rule of thumb or cross-validation) all perform well in finite samples. We illustrate the method by applying it to a dataset
from a study on the incidence of HIV in a group of female sex workers from Kinshasa. 相似文献
62.
Mohammad Z. Raqab Mohamed T. Madi 《Journal of statistical planning and inference》2011,141(10):3313-3322
In this paper, and based on a progressive type-II censored sample from the generalized Rayleigh (GR) distribution, we consider the problem of estimating the model parameters and predicting the unobserved removed data. Maximum likelihood and Bayesian approaches are used to estimate the scale and shape parameters. The Gibbs and Metropolis samplers are used to predict the life lengths of the removed units in multiple stages of the progressively censored sample. Artificial and real data analyses have been performed for illustrative purposes. 相似文献
63.
This paper considers the problem of analysis of covariance (ANCOVA) under the assumption of inverse Gaussian distribution for response variable. We develop the essential methodology for estimating the model parameters via maximum likelihood method. The general form of the maximum likelihood estimator is obtained in color closed form. Adjusted treatment effects and adjusted covariate effects are given, too. We also provide the asymptotic distribution of the proposed estimators. A simulation study and a real world application are also performed to illustrate and evaluate the proposed methodology. 相似文献
64.
迪力夏提.买买提 《齐齐哈尔大学学报(哲学社会科学版)》2010,(2):173-175
排球训练的目的是为了使运动员获得身体素质、技术、战术及心理诸方面的能力.因此,在排球训练当中,不仅要练身体素质、技术、战术及应用,还必须对排球运动员所需要的心理特征施加有意识的训练. 相似文献
65.
The paper attempts to analyze the consequences of political pressure placed on the Public Service Commission (PSC) of Bangladesh.
Through extensive literature review and empirical research, the authors conclude that the independence, efficiency and effectiveness
of the PSC largely depend on the politics–administration relationship. Furthermore, this relationship is affected by regime
types and it regulates the optimum functioning or malfunctioning of the institution.
Dr. Ferdous Jahan : Dr. Jahan is an Associate Professor of Public Administration at the University of Dhaka, Bangladesh. She has part time affiliation with BRAC Development Institute, BRAC University. Dr. Jahan is also a post-doctoral fellow of the Jerry Lee Center of Criminology, University of Pennsylvania, USA. Her current academic interests and research include: governance; corruption; legal empowerment of the poor; women’s empowerment issues in developing societies; how the state may affect women’s empowerment through public policies and laws; and other development related issues. Asif Mohammad Shahan : Mr. Asif Mohammad Shahan is a Research Associate/Lecturer at the Institute of Governance Studies, BRAC University. He completed his Masters Degree in 2007 in Public Administration from the University of Dhaka. His research interests are public management, governance, bureaucratic politics and politicization of the bureaucracy, local government. 相似文献
Asif Mohammad Shahan (Corresponding author)Email: |
Dr. Ferdous Jahan : Dr. Jahan is an Associate Professor of Public Administration at the University of Dhaka, Bangladesh. She has part time affiliation with BRAC Development Institute, BRAC University. Dr. Jahan is also a post-doctoral fellow of the Jerry Lee Center of Criminology, University of Pennsylvania, USA. Her current academic interests and research include: governance; corruption; legal empowerment of the poor; women’s empowerment issues in developing societies; how the state may affect women’s empowerment through public policies and laws; and other development related issues. Asif Mohammad Shahan : Mr. Asif Mohammad Shahan is a Research Associate/Lecturer at the Institute of Governance Studies, BRAC University. He completed his Masters Degree in 2007 in Public Administration from the University of Dhaka. His research interests are public management, governance, bureaucratic politics and politicization of the bureaucracy, local government. 相似文献
66.
A Bayesian elastic net approach is presented for variable selection and coefficient estimation in linear regression models. A simple Gibbs sampling algorithm was developed for posterior inference using a location-scale mixture representation of the Bayesian elastic net prior for the regression coefficients. The penalty parameters are chosen through an empirical method that maximizes the data marginal likelihood. Both simulated and real data examples show that the proposed method performs well in comparison to the other approaches. 相似文献
67.
In some situations, for example in agriculture, biology, hydrology, and psychology, researchers wish to determine whether the relationship between response variable and predictor variables differs in two populations. In other words, we are interested in comparing two regression models for two independent datasets. In this work, we will use the parametric and nonparametric methods to establish hypothesis testing for the equality of two independent regression models. Then the simulation study is provided to investigate the performance of the proposed method. 相似文献
68.
Mohammad H. Tamdgidi 《Sociological spectrum》2013,33(1):29-55
Drawing on Derrida, Foucault, Dorothy Smith, Anzaldúa, Wallerstein, Said, and Gurdjieff, among others, this article argues that the strangeness of Abu Ghraib—“father of the strange (or of the stranger)”—has less to do with what went on inside the prison and more with the global prison yard. Strange is how we, global spectators of the prison abuses, continue to stand on shaky cardboard boxes of rising and falling empires with hoods of amnesia and evasion put on our minds, and sophisticated media wires of true or false fears manipulating our emotions. To escape from prison, a mystic once said, one must first realize one is in prison. The inquiry is used as grounds for advancing a discourse on Newtonian and quantal sociological imaginations in favor of a Sociology of Self-knowledge. 相似文献
69.
Mohammad Taghi Sheykhi 《Social indicators research》2006,78(2):251-270
The article explores some of the theoretical perspectives on widows, followed by empirical findings on the issue in Tehran.
Widowhood transition being pursued by drop in relations, is observed and examined from various dimensions, with the hope of
improving the quality of life of the widows. Some of the socio-economic effects of widowhood as appraised by various thinkers
and scientists, are reflected in the context. The phenomenon being in existence as long as socially regulated marriage continues
under the cause-and-effect laws, needs probing with special reference to the modern time. That is, being subject to emotional
crises, they need to be multi-dimensionally studied. Through a multi-method strategy, and with the use of questionnaire tool,
data were collected. Widowhood as a common problem in old age is followed by the isolation, a period of change and new challenges,
i.e., reflection of a major stressful life event. However, widows as a vulnerable social group are seen worldwide with commonalities.
In other words, about half of the women householders in the world are widowed. The author reflects a clear and tangible picture
of the widows’ quality of life, and their satisfaction with life through the tabulated data. Nevertheless, government and
relevant agencies in Iran, need to work and plan hard to provide the widows with necessary security and support. 相似文献
70.
论全球化背景下的民族身份认同和爱国主义——对爱国主义情感的民族学解读 总被引:1,自引:0,他引:1
在全球化过程中,现代民族国家尤其是后发展国家面临着“去中心化”的威胁,国家认同出现严重危机.国家认同与国家安全是一个问题的两个方面:对公民而言是认同危机,对国家而言则是安全危机.为了维护国家的生存与发展,后发展国家不得不同时完成构建民族国家和融入全球社会这两大任务.在全球化时代,国家认同变得困难重重.领土分割在后现代的... 相似文献