A generalized polynomial-logistic distribution and applications

ABSTRACT

In the present article we introduce a new class of distributions which nests the classical Logistic distribution and offers additional flexibility when data fitting is chased. We provide exact expressions for its moments and absolute moments, investigate its ageing properties, and discuss several techniques for estimating its parameters. Finally, we use the new family to build a parametric model that describes accurately the Euro/CAD exchange reference rates for the period 1/4/1999–12/31/2011.     

Using the Hybrid Two-Step estimation approach for the identification of second-order latent variable models

The aim of this paper is to define a new approach, called Hybrid Two-Step, to estimate the parameters of a second-order latent variable (LV) model in the case of formative relationships between the first-order and the second-order LVs. In this respect, we introduce the two main approaches to the estimation of second-order constructs through the partial least squares-path modelling: the so-called Repeated Indicators approach and the Two-Step approach. Some criticisms of these methodologies are highlighted and a solution to the issue of the identification of formative second-order constructs is suggested through the adoption of a Hybrid Two-Step approach. A Monte Carlo simulation study aimed at comparing the approach proposed with the traditional ones was performed. Finally, a case study about the passenger satisfaction is presented to show the implementation of the method and to give some comparative empirical results.     

鸟虫印文字造型探微

古玺印中的鸟虫文字以字形结构为基本框架、参以鸟、鱼、虫等动物的形象来形成富有图画意味的印章文字.其文字造型的渊源是西周以来的大篆美饰之风,鸟虫印文字的基本造型规律是;字法"文","图"一体,笔画化"直"为"曲",章法以"繁"代"简".     

雕刻系统中的仿形测试与三维成型技术研究

介绍了作者对雕刻行业ＣＡＴ／ＣＡＤ／ＣＡＭ系统进行研究开发所发取得的部分成果，其中包括浮雕轮廓仿形ＣＡＴ装置的实现，测量数据的筛选与处理方法Ｄｍａｘ浮雕曲面造型算法及数控加工文件的形成等。