An investigation of transformation-based prediction interval for the Weibull median life

Statistical inference based on the Weibull distribution, a distribution widely used in reliability and survival analysis, is usually difficult as it often involves numerical computation and approximation. However, this distribution can be transformed to near-normality by a simple power transformation. Based on this transformation, a prediction interval (PI) for its median can be easily constructed through an inverse transformation. The procedure for selecting the best power transformation through minimizing Kullback-Leibler information is described. The property of this transformation-based PI is investigated. Simple correction factors are also proposed. It is shown that the transformation-based PI with corrections performs well, irrespective of the sample size and parameter values. Simulation results show that the new PI generally outperforms the existing PI. Numerical examples are given for illustration.     

路过天空——深圳航空平面广告创意手记

曾经读过泰戈尔的这句“天空没有翅膀的痕迹，而我已飞过”。无奈地承认，这曾是对天空最美丽的想象。不过生存要继续。2006，深航，我们要继续为它构筑在天空的远大版图。 航空业显然是不轻松的，高风险低回报，加之油价上涨、外航潜人、国内航空公司3＋X竞争局面的加剧…在高度发展的商业社会中，天空中也有狭路相逢之时。     

主观数据的逻辑检验法

数据的清理与校检是进行数据分析与市场研究的前提和基础。 从市场上调查而来的数据，以各种变量形式存在，这些变量从内容上看大致可以分为两类：客观变量与主观变量。客观变量是指分析单位的属性、状态和行为，如性别、年龄等具有确定性、稳定性、对应性特征的数据。客观变量的清理与校检可以通过设置变量之间的逻辑检验进行查错。如个人年收入应小于家庭年收入，各项消费支出应小于总收入等其他与生活规则、社会常识、行为习惯相一致的变量关系。主观变量是指受访的态度、满意度等其他主观感受．这些变量具有一定的随机性、可变性与不可预测性，由于主观变量与其他变量之间是概率性关系，     

A comparison of Ad valorem and per unit taxes in regulated monopolies

This paper compares the output and revenue effects in the rate-of-return regulated monopoly model. Both the ad valorem and the unit tax generally decrease the use of capital, and as such, reduce the output and raise the price. In addition, it is shown that Suits and Musgrave's conclusion of higher revenue of an ad valorem tax at a given output can apply to a regulated monopolist if the marginal product of labor under the ad valorem tax is greater than or equal to that under the unit tax. Similarly, their second conclusion, that for a given tax revenue an ad valorem tax has a larger output than a unit tax rate before the revenue-maximizing tax rate, can also apply to the regulated monopolist.     

交易费用与企业技术创新战略决策

对企业技术创新战略决策进行了两阶段分析，并采用交易费用理论对创新企业技术创新来源决策进行了分析，认为企业内部技术创新是企业吸收外部技术的基础，大部分企业技术创新将走自主创新与引进创新相结合的道路。     

工作任务分解（WBS）在企业成本过程控制管理中的作用

长庆采油二处通过对企业水电燃料网络的系统研究，在继承传统的水电燃料管理方式和方法的基础上．引入现代企业质量过程控制的方式方法，按照“四新一效”的管理指导思想，提出了“五确定”的过程控制政策和具体要求，将工作任务层层分解（即WBS），落实了“启动、计划、执行、控制、结束”五个阶段的成本过程控制，实现了“监管一体化、管理过程化、业务流程精简效能化、资源共享化”四大效用，并取得了显著的经济效益。     

Theory and practice of value management and its innovation for natural resources from the perspective of sustainable development

The supreme obstacle for sustainable development of natural resources is the scarecity, bottleneck. So how to promote the sustainable utilizing and increase the using efficiency of natural resources is worth studying. This paper suggests that we should improve the model and means of evaluating method and value management based on th~ theory of natural resource compensation. This paper discusses the User Cost Method based on the microeeonomicaspect which can change the evaluating method for natural resources. From the perspective of value managemen model, we should use the User Cost Method to realize the linkage and integration of micro and macro eompensation for natural resources. Based on the evaluating and aecounting idea User Cost Method, this paper presents a theo. retical framework to harmonize and link micro and macro compensation for natural resources. At present, we should seek the new approach and method to manage natural resources, so can we realize the capitalization managemen focusing on the vahte management for natural resources.     

房地产投资信托基金（REITs）融资模式的法律分析——以越秀房地产投资信托基金（香港）为蓝本

房地产投资信托基金（REITs）是一种产生于美国的房地产融资模式，它在融资方面发挥着重要的作用。进入21世纪后，许多亚洲国家也开始尝试这种新型的融资模式。2005年中国广州的越秀房地产投资信托基金在香港上市交易，拉开了中国大陆地产商通过REITs模式融资的序幕。然而，关于REITs的系统研究在国内目前仍然较少。本文尝试对这一模式作一简单介绍并着重分析其内在的法律关系，以期能够有助于这种模式的规范健康发展。     

论企业的品牌战略——以商标法为视角

在世界经济一体化进程中,我国企业知名品牌数量少、档次低,影响其发展壮大,促使其树立品牌战略。从商标法的角度看,品牌设计要符合法律的规定,考虑到不同地区的风俗习惯,尽量使用强商标。商标要及时注册和续展,使用联合商标和防御商标,以防止商标被境外抢注;同时,也要注重商标管理和保护,保证企业的品牌战略顺利实施。     

Time to Keep Fit!

At 7 o'clock at night,Adeline Yue,who works at a foreign company in China, called it a day,packed up her bags and walked to a nearby fitness club to do her daily workout.Dancing with the music,Yue eased away the 10 hours of tired- ness and pressure of work,sweating and panting."I really enjoy coming here,to completely relax myself,and at the same time,work on a healthy body,"she said as she ran on the treadmill.