射频电导轮廓的概念及应用

提出了粗糙表面射频电导轮廓的概念及物理意义,介绍了与射频电导轮廓相关的技术指标和测量、计算方法,对射频电导轮廓在分析计算粗糙表面射频等效电导率、优化射频微波器件加工工艺流程等方面的应用情况进行了简介。实验表明,研究成果与实测数据相吻合。     

Multidimensional Inequality Across Three Developed Countries

This paper produces comparable estimates of multidimensional inequality for the U.S., Germany, and Australia. Two alternative approaches with differing interpretations are employed. The first method projects all facets of welfare onto a single variable which is then analyzed using standard univariate techniques. The second approach establishes equivalent‐income distributions that would lead to an equalization of welfare, such that the difference between this counterfactual and the true income distribution can be measured. This difference is then interpreted as the degree of income redistribution required to offset welfare inequality. Using data on permanent incomes, health scores, years of education, and leisure times, we observe much higher levels of inequality in the U.S. than in Germany or Australia. Our results are highly statistically significant and hold over a large variety of weighting specifications.     

基于改进的二阶阻容等效电路模型的锂电池建模仿真

为了更加精确地描述锂离子电池的工作特性,在传统二阶Thevenin模型的基础上考虑电池的滞回电压特性与充放电电阻特性,建立改进的二阶阻容等效电路模型。在Matlab/simulink中建立电池仿真模型,通过HPPC实验对电池的参数进行辨识。借助Matlab中的Cftool工具箱对数据进行多项式拟合。之后经过恒流放电实验和脉冲放电实验对模型进行验证分析,通过仿真结果与实验结果的对比分析,发现该模型在恒流放电实验中仿真电压与真实电压的误差低于0.05V,在脉冲放电实验中的误差低于0.025V,验证了改进的锂离子电池模型的准确性,满足工程需要。     

模糊聚类在奖学金评定中的应用

各类学校学生的奖学金评定中，传统的总分或平均分排名评定法，都因专业，年级、课程、考试试题的深度和难度及评卷教师不同，带来较多的不合理性。文章从极值标准化入手，确定模糊评定等级、隶属度函数、权重集，运用夹角余弦法建立模糊相似矩阵再改造为等价矩阵，最后进行聚类分析。克服了上述合理性，取得了比交满意的结果     

MARTINGALE MEASURES FOR DISCRETE-TIME PROCESSES WITH INFINITE HORIZON

Let ( S_t ) _tεI be an R^d-valued adapted stochastic process on (Ω, , ( _t ) _tεI , P ). A basic problem occurring notably in the analysis of securities markets, is to decide whether there is a probability measure Q on  equivalent to P such that ( S_t ) _tεI is a martingale with respect to Q. It is known (see the fundamental papers of Harrison and Kreps 1979; Harrison and Pliska 1981; and Kreps 1981) that there is an intimate relation of this problem with the notions of "no arbitrage" and "no free lunch" in financial economics. We introduce the intermediate concept of "no free lunch with bounded risk." This is a somewhat more precise version of the notion of "no free lunch." It requires an absolute bound of the maximal loss occurring in the trading strategies considered in the definition of "no free lunch." We give an argument as to why the condition of "no free lunch with bounded risk" should be satisfied by a reasonable model of the price process ( S_t ) _tεI of a securities market. We can establish the equivalence of the condition of "no free lunch with bounded risk" with the existence of an equivalent martingale measure in the case when the index set I is discrete but (possibly) infinite. A similar theorem was recently obtained by Delbaen (1992) for continuous-time processes with continuous paths. We can combine these two theorems to get a similar result for the continuous-time case when the process ( S_t ) _{t εR+} is bounded and, roughly speaking, the jumps occur at predictable times. In the infinite horizon setting, the price process has to be "almost a martingale" in order to allow an equivalent martingale measure.     

A Counterexample to Several Problems In the Theory of Asset Pricing

We construct a continuous bounded stochastic process ( S _t,) _1E[0,1] which admits an equivalent martingale measure but such that the minimal martingale measure in the sense of Föllmer and Schweizer does not exist. This example also answers (negatively) a problem posed by Karatzas, Lehozcky, and Shreve as well as a problem posed by Strieker.     

Quantifying nontariff barriers in Ukraine: a comprehensive trade cost approach

Great strides have been made recently in the theoretical approach to quantifying nontariff barriers. Modifying an approach proposed by Novy (2013), this article attempts to understand the extent of nontariff barriers between Ukraine and its major trading partners in goods by fashioning a new approach to trade in services as well. I provide the first comprehensive estimates of ad valorem equivalents of the nontariff measures that exist in Ukraine.     

漫谈文化转换与英汉成语翻译

成语是英汉两种语言中民族文化特色较浓厚的部分。文章从文化转换的角度处理成语翻译,只有这样才能尽量使译文读者得到与原文读者相同的感受。     

灌注式护坡桩的设计方法

本文从分析护坡桩常见的破坏方式及原因入手，提出在设计中应对一些主要问题根据不同的条件具体进行考虑，并对灌注式护坡桩的设计方法进行了探讨。文章首先分析了护坡桩五种常见的破坏方式及原因，并按悬臂式、单锚浅埋、单锚深埋三种类型探讨，论述了灌注式护坡桩的设计方法，同时对基底隆起问题及锚杆设计问题进行了分析。