Visualization of generalized mean estimators using auxiliary information in survey sampling

Abstract

The mean estimators with ratio depend on multiple auxiliary variables and unknown parameters in a finite population setting. We propose a new generalized approach with matrices for modeling the mutivariate mean estimators with two auxiliary variables. Our approach brings naturally a graphical analysis for comparing mean estimators.     

The Myth of the Computer Hacker

The seriousness of computer hacking is not exaggerated, it is far worse than that. The computer hacker has attained the status of myth; society associates all computer crime with a mythical perpetrator that bears no resemblance to reality. This paper will argue that in the early stages of the myth the computer hacker was regarded as a highly skilled but mentally disturbed youth who has an unhealthy association with computers. The new reality of electronic commerce resulted in pressures that culminated in the computer hacker becoming regarded as a dangerous criminal. A thorough analysis of the statistics will demonstrate that the majority of computer intruders are neither dangerous nor highly skilled, and thus nothing like the mythical hacker.     

从经济学视角谈科学育才之路

在现阶段高校毕业生面临着社会对他们的有效需求不足的问题,从而必须面对社会对高素质人才的需求同高校毕业生供给相对过剩这一结构性供需矛盾。本文从经济学角度分析产生这种矛盾的原因,进而提出只要高校学生工作措施得当,政策有针对性,就有可能缓解上述供需矛盾。     

On calculating the fisher information in order statistics

This article gives a simple result for the expression of the Fisher information in order statistics. This result enables us to calculate easily the Fisher information in any set of order statistics whose details have been known to be messy and complicated. We consider here its application in the optimal spacing problem where the exact Fisher information in order statistics has been approximated with the asymptotic information or the reciprocal of the variance of a suitable estimator. This work was supported by Korea Research Foundation Grant(KRF-2000-015-DP0056)     

新资本结构理论综述

随着资本结构研究的深入,理论界进一步放宽MM定理的基本假设。以Jensen,Myers,Ross,Leland,Harris,Hart等学者为代表的新资本结构理论引入最新的研究方法,对资本结构展开分析。本文按照新资本结构理论发展的历史轨迹,全面评述了资本结构理论中最为重要的各种理论,同时系统地描述了各有关理论的基本内容。     

供应链管理中的信息流网络

本文对供应链管理中的信息流理论进行了探讨 ,指出了传统链式信息流模式的缺陷 ,分析了简单的网络式信息流模型的构造 ;阐述了信息流网络的特征与优势 ;对若干有待深入研究的问题进行了展望。     

A strategy for third-party logistics systems: A case analysis using the blue ocean strategy

One of today's most frequently discussed topics in the business world is how to escape from the intense Red Ocean and how to create an uncontested Blue Ocean. However, because there are few practical guidelines available on this topic, we will introduce a case study of a third-party logistics (3PL) provider, CJ-Global Logistics Service (CJ-GLS), to show how it aspires to be a leader in the newly introduced 3PL industry in South Korea. CJ-GLS is a latecomer in the logistics industry, and its resources, such as the number of trucks and warehouses, are relatively small in comparison to those of established companies. But, it has achieved a distinct competitive advantage through innovative information technology (i.e., RFID—radio frequency identification), which has enabled it to create an uncontested market space, electronic logistics business. One remarkable fact about CJ-GLS is that its swift growth comes not from attracting competitors’ customers from the existing Red Ocean market but from creating a Blue Ocean market (3PL market), which previously existing incumbents ignored, and also from constructing a new business model founded on a RFID-based, ubiquitous-oriented 3PL system. Analyzed through a Four Actions Framework and characterized as Blue Ocean, this case study provides valuable information on how a company reinforces its competitive advantage from the Red Ocean while it transitions into a Blue Ocean by utilizing advanced information communication technologies.     

当代科学技术革命对马克思主义哲学的证实和发展

近半个世纪以来,现代科学沿着辩证综合的方向取得突飞猛进的发展,以信息论论证物质统一性的原理及人工智能对辩证唯物主义意识论与认识论充实与深化的内容,论证当代科学技术对马克思主义哲学的证实与发展。     

信息时代流通馆员应是图书馆服务工作的“主角”

部分高校图书馆把工作的重心几乎都转移到了数字图书馆、虚拟图书馆,纸质馆藏、流通工作有所弱化,对传统的流通工作认识有偏差,造成流通馆员对工作认识不足.通过对流通管理工作的分析,认为信息时代的流通馆员应是高校图书馆这个大舞台的主要角色,流通服务工作应是图书馆工作的核心,应唤起流通馆员的职业崇高意识,从而树立现代图书馆的新形象,为读者更好地服务.     

以信息加工观点看待学习策略

学习策略是学习心理学研究的热点之一,许多学者对学习策略有不同的定义。信息加工的学习理论已成为研究学习心理学的主流。作者通过对学习策略的定义、认知策略的含义、元认知的内涵以及三者之间的关系的论述,试图以学习的信息加工观点来探讨学习策略的实质。