一种高性能APD反向偏压控制电路的实现

本文设计了一种应用于APD反向偏压控制的DC/DC变换电路,并对实测结果进行了分析。     

五四时期统一战线的组成和发展

五四运动中的统一战线是中国新民主主义革命统一战线的开端 ,它是由新文化运动统一战线和爱国运动统一战线所组成的 ,范围是极其广泛的 ,是在矛盾运动中向前发展的     

Dose finding with continuous outcome in phase I oncology trials

The goal of a phase I clinical trial in oncology is to find a dose with acceptable dose‐limiting toxicity rate. Often, when a cytostatic drug is investigated or when the maximum tolerated dose is defined using a toxicity score, the main endpoint in a phase I trial is continuous. We propose a new method to use in a dose‐finding trial with continuous endpoints. The new method selects the right dose on par with other methods and provides more flexibility in assigning patients to doses in the course of the trial when the rate of accrual is fast relative to the follow‐up time. Copyright © 2014 John Wiley & Sons, Ltd.     

A Model for Water Pricing

This note describes a situation in which a simple mathematical model helped solve an important practical problem: how to price water fairly. It is intended as an example, rather than as a mathematical contribution to control theory.     

On the adequacy of the chi-squared approximation for the coefficient of variation

The X² approximation to the distribution of the sample coefficient of variation of a normally distributed random variable, due to McKay 1932 is not nearly as accurate as suggested by the confirmatory studies of Fieller 1932 and Pearson 1932.The approximation will, however, be adequate in many practical situations and has the convenience of requiring nothing more than the readily available tables of x².     

On the Breakdown Properties of Some Multivariate M‐Functionals*

Abstract. For probability distributions on ? ^q, a detailed study of the breakdown properties of some multivariate M‐functionals related to Tyler's [Ann. Statist. 15 (1987) 234] ‘distribution‐free’ M‐functional of scatter is given. These include a symmetrized version of Tyler's M‐functional of scatter, and the multivariate t M‐functionals of location and scatter. It is shown that for ‘smooth’ distributions, the (contamination) breakdown point of Tyler's M‐functional of scatter and of its symmetrized version are 1/q and , respectively. For the multivariate t M‐functional which arises from the maximum likelihood estimate for the parameters of an elliptical t distribution on ν ≥ 1 degrees of freedom the breakdown point at smooth distributions is 1/( q + ν). Breakdown points are also obtained for general distributions, including empirical distributions. Finally, the sources of breakdown are investigated. It turns out that breakdown can only be caused by contaminating distributions that are concentrated near low‐dimensional subspaces.     

金钱债权执行竞合解决原则的论争与评析

各国在解决金钱债权的执行竞合问题时,有优先主义、平等主义和折衷主义等立法例。学界对各种原则的优劣论争由来已久,至今仍无定论。我国目前解决金钱债权执行竞合的原则既未采优先主义,也未采平等主义或折衷主义。最高人民法院对此问题作出了相当细化的规定体现了其在相关立法不完备的情况下解决实际问题的良苦用心。由于我国破产立法最终会采用一般破产主义,为与之相协调,我国今后关于金钱债权执行竞合解决原则的立法选择应为优先主义。     

道家文化与二十世纪国民性改造思潮

启蒙主义及其文学是把道家文化放在国民性改造的启蒙语境中来理解的 ,并按照启蒙的价值取向和时代要求来阐释道家文化。对待道家文化有三种方式 :选择性认识或误读 ;发掘它与现代文化的会通点并发挥其文化建设潜能 ;批判和否定道家文化。尽管对待道家文化的态度和方式不同 ,但目标却是一致的 :国民性改造和人的现代化。     

浅析审计的独立性与非审计服务的关系

分析审计的独立性与非审计服务的关系,对这些问题提出了建设性的意见。     

关于研究与开发费用的会计处理

研究与开发费用在会计上的处理主要有三种方法,一是完全费用化,二是完全资本化,三是部分费用化,造成这些处理方法不同的主要原因之一,是对研究与开发费用的范围与效用理解不同.本文在对我国研究与开发费用科学分析的基础上,提出了对此费用会计处理的新的见解.