A generalization of the compound rayleigh distribution: using a bayesian method on cancer survival times

In this paper the generalized compound Rayleigh model, exhibiting flexible hazard rate, is high¬lighted. This makes it attractive for modelling survival times of patients showing characteristics of a random hazard rate. The Bayes estimators are derived for the parameters of this model and some survival time parameters from a right censored sample. This is done with respect to conjugate and discrete priors on the parameters of this model, under the squared error loss function, Varian's asymmetric linear-exponential (linex) loss function and a weighted linex loss function. The future survival time of a patient is estimated under these loss functions. A Monte Carlo simu¬lation procedure is used where closed form expressions of the estimators cannot be obtained. An example illustrates the proposed estimators for this model.     

浅议英语学习中的文化差异

东西方文化存在着很大的差异,对西方文化不了解,势必造成英语学习的障碍乃至交际的失误。     

试析蒙古高原二元对立的政治格局

蒙古高原特殊的地理环境 ,使这里成为游牧民族生息繁衍的摇篮。在高原内部 ,由于自然环境与地缘政治的差异 ,又分为漠南与漠北两个相互独立的地理单元。以此为基础 ,在蒙古高原上出现了一次次二元对立的政治格局     

青海羌族文化述略

本文借助考古资料,叙说了青海古代文化中的羌族文化系列,并对其文化特征的差异性作了分析。     

探析俄汉礼节语言的民族文化差异

俄汉礼节语言的民族差异是两种文化价值观差异的反映。在汉文化中,独特的中华传统和民族文化形成了中国特色的复杂的礼节语言体系。在俄文化中,礼节语言明显带有简单化、模式化和抽象化的特点,这同俄罗斯民族的思维方式密切相关。     

“文化族别化”的当代困境及其反思

民族识别工作中以客观的民族文化特征作为民族分类的主要依据,导致了人们对民族文化具有独特性、民族之间的文化具有差异性的强调,最终导致了"文化族别化"。"文化族别化"不能解释不同群体之间普遍存在的交往、交流、交融的客观事实,又将地域性的文化转化为具有明确民族归属的民族文化。对"文化族别化"这种社会认识面临的困境展开讨论和反思,有利于申明民族之间存在广泛的文化交流和客观联系。更为重要的是,承认民族之间的交流和联系比刻意地强调民族之间存在的差异更加重要。     

论民族视角的经济研究

本文提出把民族作为中国少数民族经济或民族经济学的分析框架。民族生存的自然环境和民族认同的文化特质构成民族概念的内在规定,并呈现为民族经济生活自然差异和文化差异二重性。把握民族经济生活差异二重性是建构学科理论框架的关键。     

Comment on “Constrained Optimization Approaches to Estimation of Structural Models”

We revisit the comparison of mathematical programming with equilibrium constraints (MPEC) and nested fixed point (NFXP) algorithms for estimating structural dynamic models by Su and Judd (2012). Their implementation of the nested fixed point algorithm used successive approximations to solve the inner fixed point problem (NFXP‐SA). We redo their comparison using the more efficient version of NFXP proposed by Rust (1987), which combines successive approximations and Newton–Kantorovich iterations to solve the fixed point problem (NFXP‐NK). We show that MPEC and NFXP are similar in speed and numerical performance when the more efficient NFXP‐NK variant is used.     

An improved alternative estimation procedure for current population mean in presence of positively and negatively correlated auxiliary variables in two-occasion rotation patterns

Abstract

The present study confirms the influential role of a positively and a negatively correlated auxiliary variables in enhancing the precision of estimates of current population mean in two occasion rotation (successive) sampling. Exponential-type estimators of current population mean have been proposed for three different situations: (i) the information on a positively correlated auxiliary variable is readily available on both occasions (ii) the information on a negatively correlated auxiliary variable is readily available on both occasions and (iii) the information on both positively and negatively correlated auxiliary variables are readily available on both the occasions. The characteristics of the proposed estimators have been explored and their efficacious performances are compared with the natural and recent contemporary estimators. Optimum replacement strategies of the proposed estimation procedures have been formulated. Simulation and empirical studies are carried out to justify the proposition of the proposed estimators and appropriate recommendations have been put forward to the survey practitioners.     

Construction of incomplete Sudoku square and partially balanced incomplete block designs

Abstract

The present article deals with the study of association among the elements of a Sudoku square. In this direction, we have defined an association scheme and constructed incomplete Sudoku square designs which are capable of studying four explanatory variables and also happen to be the designs for two-way elimination of heterogeneity. Some series of Partially Balanced Incomplete Block (PBIB) designs have also been obtained.