Asymptotic results for the risk process based on marked point processes

Abstract

In this paper asymptotic properties for the risk process will be studied when the number of risk units tends to infinity. The paper extends asymptotic properties for the classical risk process to more general processes. In the classical risk process the claim amounts are assumed independent and identically distributed, and the claim number process is a homogeneous Poisson process.

The key tool is point process theory with associated martingale theory. The results are illustrated by examples.     

一类非线性常微分方程边值问题解的存在性

采用三层加密技术,即在用户IE客户端,使用VB脚本对用户提交的信息进行第1层加密;在网站服务器端,使用ASP函数进行第2层加密;在数据库服务器端,使用SQL自定义函数,对进入数据库的信息进行第3层加密,开发了《上海电视大学教务管理系统分校版》管理软件,并进行了实际应用。     

石油及液体石油产品静态计量技术

介绍了石油静态计量基础知识,包括物理特性、大罐的标定、温度、液位、含水的测量方法,最后给出了标准计算顺序。     

锚固地梁技术在人工边坡治理中的应用研究

峡口码头高切坡,处于硬软岩性的交接部位,岩体中裂隙发育,多为层状结构和碎裂结构,在切坡初期,常产生规模不等的滑移破坏。基于小变形的假设和有限元分析基础上,确定工程治理措施,是紧密结合工程实践的重要课题。     

A medium-N approach to macroeconomic forecasting

This paper considers methods for forecasting macroeconomic time series in a framework where the number of predictors, N, is too large to apply traditional regression models but not sufficiently large to resort to statistical inference based on double asymptotics. Our interest is motivated by a body of empirical research suggesting that popular data-rich prediction methods perform best when N ranges from 20 to 40. In order to accomplish our goal, we resort to partial least squares and principal component regression to consistently estimate a stable dynamic regression model with many predictors as only the number of observations, T, diverges. We show both by simulations and empirical applications that the considered methods, especially partial least squares, compare well to models that are widely used in macroeconomic forecasting.     

THE IMPACT OF GOVERNMENT EXPENDITURE ON GROWTH: EMPIRICAL EVIDENCE FROM A HETEROGENEOUS PANEL

This paper investigates the impact of government expenditure on growth, in a heterogeneous panel, for a sample of developing countries. Using generalized method of moments techniques, we show that countries with substantial government current expenditure have strong growth effects, which vary considerably across the nations.     

Estimation bias in choice models with last choice feedback

The study compares two estimation methods for choice models with last choice feedback, using simulated and real data. The first method ignores the impact of unobserved heterogeneity on observed choices via presample choices, while the second method approximates this impact by a stochastic relationship. In panels with less than 10 choices per panelist, the first method overstates the impact of last choice on current choice and understates the impact of intrinsic preferences (i.e., brand intercepts). The second method performs significantly better than the first method. Under both methods, an increase in the number of heterogeneous coefficients in the model tends to increase the bias in the estimates. The largest bias occurs when lagged choice coefficients are heterogeneous.     

确保砼外观质量的施工技术措施

随着桥梁工程建设越来越注重砼外观质量,特别是城市及旅游景点的桥梁工程,出露的结构物往往要求一次浇筑成型,面层平整光滑、色泽均匀,棱角顺直、无碰损和污染,不需做任何外装饰,直接采用现浇砼的自然色作为饰面。文章通过模板、砼配合比、砼浇筑及振捣等方面详细阐述了确保砼外观质量的技术措施。     

Educational Marketing in the Latin American Context: An Executive MBA Case

ABSTRACT

This paper provides Latin American Executive MBA students' approaches to studying, achieving profile, preferences and perceptions of instructional methods used in teaching marketing courses and educational marketing segments based on their preference ranking of instructional methods and approaches to studying. Results indicate that, in general, these students have a strong need for excellence, and for gaining status with experts. Their approach to studying is directed first at understanding what they learn, and then at doing well in their courses. Results also indicate that such students strongly prefer courses using participative instructional methods, such as case studies, to the instructor-dominated lecture method. Thus, there appears to be a gap between the types of instructional methods now being emphasized in MBA classrooms and the methods preferred by the students. These students can be placed into four distinct segments, namely Technology Sophisticated Learners, Academic Success Seekers, Degree Seekers and Instructor-Oriented Learners. Managerial implications from the results are drawn both for the administrators and for the faculty members teaching in an EMBA program.

RESUMEN. Este estudio ilustra el enfoque do los estudiantes latinoamericanos de MBA Ejecutivo sobre las materias de estudio, trazado de un perfil, preferencias y percepción de los métodos de enseñanza utilizados en los cursos de mercadeo y mereadeo educacional en base a sus preferencias, que se utilizaron para desarrollar un sistema de clasificación de los métodos y enfoques de la enseñanza y el aprendizaje. De acuerdo a los resultados, los estudiantes sienten una gran necesidad de alcanzar la exceleneia, y de adquirir renombre junto a los expertos. Ellos encaran sus estudios eonsiderando prioritaria la función de comprender lo que aprenden, y tienen como meta secundaria el obtener buenos resultados en sus cursos. Además, los resultados también indican que estos esludiantes prefieren claramente usar métodos de enseñanza participativos–tales como los estudios de caso–al método disertivo dominado por el profesor. Consecuentemente, nos parece que existe una brecha entre los métodos de enseñanza que se están implementando en las salas de aulas de los cursos de los MBA, y los métodos preferidos por los alumnos. Estos estudiantes pueden dividirse perfectamente en cuatro segmentos, o sea, Estudiantes de Tecnologías Sofisticadas, Buscadores de éxito Académico, Buscadores de Diplomas y Estudiantes Orientados por el Instructor. En el estudio trazamos las implicancias administrativas inherentes a estos resultados, así como para los docentes que están enseñando el programa EMBA.

RESUMO. Este trabalho apresenta a visão de estudantes do MBA Executivo da América Latina, em relação ao estudo, à formação do seu perfil, às preferências e às percepções dos métodos didáticos utilizados nos cursos de marketing e nos segmentos educacionais dc marketing, baseados no ranking de suas preferências pelos métodos didáticos e pelas abordagens do estudo. Os resultados indicam que, em geral, estes estudantes buscam rigorosamente a excelência e a conquista de status através de especialistas. A sua abordagem do estudo está direcionada. primeiramente, ao conhecimento e, em segundo lugar, ao sucesso do seu desempenho. Os resultados também indicam que tais estudantcs preferem nitidamente os cursos que utilizam o método didático participativo, como o estudo de casos, ao método de ensino tradicional expositive Assim. parece haver uma lacuna entre os tipos de métodos didáticos atualmente sendo enfatizados nas aulas de MBA e entre os métodos preferidos pelos estudantes. Estes alunos podem ser classificados em quatro segmentos distintos: Aprendizes da Alta Tecnologia, Perseguidores do Sucesso Acadêmico, Perseguidores de Títulos e Aprendizes Orientados por Instrutor. As implicações gerenciais, a partir dos resultados, são delineadas tanto para os administradores quanto para os membros do corpo docente que ensinam no programa de MBA Executivo.     

论开发“蓝色国土”的新技术革命

本文提出了应用水产高新技术大力开发我国“蓝色国土”的必要性和可能性，并提出应把苗种体系的建立、疾病防治、育种新技术的应用、增养殖技术、水产品加工及渔业环境和资源保护等作为今后水产发展的关键技术和战略重点，以达到水产可持续发展之目的