数字电视机顶盒的基本原理、技术及构成探讨

探讨了数字电视机顶盒的基本工作原理,分析其技术原理,并探讨了数字电视机顶盒的中间件结构。     

RISK MEASURES: RATIONALITY AND DIVERSIFICATION

When there is uncertainty about interest rates (typically due to either illiquidity or defaultability of zero coupon bonds) the cash‐additivity assumption on risk measures becomes problematic. When this assumption is weakened, to cash‐subadditivity for example, the equivalence between convexity and the diversification principle no longer holds. In fact, this principle only implies (and it is implied by) quasiconvexity. For this reason, in this paper quasiconvex risk measures are studied. We provide a dual characterization of quasiconvex cash‐subadditive risk measures and we establish necessary and sufficient conditions for their law invariance. As a byproduct, we obtain an alternative characterization of the actuarial mean value premium principle.     

国产SW-LiDAR系统的简介

本文介绍国产机载SW-LiDAR系统的构成、特点和用途。重点阐述了该系统的三个集成原理:惯性导航原理、差分GPS原理和构象方程。介绍了该系统的工作流程。最后展望了该系统的应用前景。     

The choice between rights and underwritten equity offerings: Evidence from Chinese stock markets

We study the choice and valuation effects of alternative flotation methods using a sample of Chinese firms that must meet the return on equity (ROE) thresholds set by the government to raise equity capital. The ROE requirement, although changed over time, seems to play an important role on the valuation and performance of seasoned equity offerings. The analysis of 219 rights and 75 underwritten offerings between 2000 and 2004 shows that Chinese firms that are not qualified for the flotation method with a higher ROE requirement suffer the most at announcement and experience significantly lower buy-and-hold abnormal returns than those that are qualified. Our results suggest that the freedom to choose their preferred flotation method may be valuable to firms that meet the higher ROE requirement. Finally, our probit models identify several determinants of the choice of flotation methods.     

Strategy for New Product Development

Abstract

This study evaluates the reasons why new products fail, and recommends a Strategy for New Product Development to avoid such failures. Using a sample of four products, the Ford Edsel, Coca-Cola's New Coke, the Sony Betamax, and the RCA Videodisc, where the introduction of a new product was unsuccessful, as research data, it is determined that the most common reasons for a products failure are poor planning, poor management, poor concept, poor execution, poor use of research, poor technology, and poor timing. A recommended strategy for successful new product development includes a sound concept, an environmental assessment, management and planning, technological feasibility, research, quality assurance, and customer feedback.     

汽车自动变速器常见故障检修

汽车自动变速器的技术含量较高,结构复杂,难以让人正确掌握和对故障排除。因此对自动变速器常见故障的认识是我们正确排排除故障的重要资料。了解汽车自动变速器的类型及特点,各车系的自动变速器的特点及工作原理,各档位的使用方法,规律及技巧,指导读者如何正确的排除故障。     

On the difficulty of combining actual and potential criteria for an increase in social welfare

Summary. This paper examines two problems associated with the use of potential Pareto criteria in welfare economics. The first problem is the well-known intransitivity of the compensation criteria à la Kaldor-Hicks-Scitovsky. The second problem is the possible incompatibility between the Chipman-Moore-Samuelson criterion and the Pareto principle. The main result of this paper is that, in order to avoid either of these problems, it is necessary and sufficient that the domain to which these criteria are used is such that the Chipman-Moore-Samuelson criterion encompasses completely the Pareto criterion. When interpreted in a standard economic environment, this result is shown to be equivalent to Gorman's requirement of non-crossing between utility possibility frontiers. Received: June 18, 1998; revised version: March 2, 2000     

最小二乘原理在隧道施工安全质量预测预报中的应用(英文)

土建工程的安全质量控制的本质,就是运用数理统计原理,归纳、分析实测得到的有关数据,从而达到对现场安全作出准确诊断、对施工质量作出正确评价之目的 ,其中最常涉及的数学理论知识点是最小二乘原理。本研究通过一隧道工程实例,阐明了最小二乘原理在其安全质量预测预报中的作用及使用,颇具实用性操作性地实现了数学理论与工程实际的密切结合。     

高职院校学生社团长效育人机制的构建

高职院校学生社团发挥着思想育人、文化育人、实践育人、朋辈育人的功能,其长效育人机制的确立必须坚持主体性原则、发展性原则、科学性原则、整体性原则,并应积极构建管理整合机制、队伍发展机制、评价监督机制、激励保障机制。     

论市场经济对财务专家的要求

现代市场经济条件下财务专家应具备高超的智能素质,全面的理财知识和卓越的工作才能.文章从基本素质、市场经济观念、理财原则三个方面论述了市场经济对财务专家的要求.