海面低仰角数字微波通信系统性能及体制分析

本文介绍了海面低仰角数字微波通信系统的特点，对海面电波多径衰落进行了理论计算，指出了通信系统抗衰落的方法和手段，并给出了一种抗衰落通信系统在海面通信试验中的测试数据。     

基于协整检验的新疆出口贸易影响因素分析

利用协整分析和误差修正模型对新疆出口贸易发展的影响因素进行实证分析,结果表明,在长期内其发展受进口、汇率和人力资本投入的影响较大,在短期内受到进口、外商直接投资以及能源消耗的影响较为显著.     

文化翻译阐释中的文化失误——杨译“Manproposes，Heavendisposes”文化阐释的个案研究

人们大都认为杨宪益所译《红楼梦》中“Manproposes,Heavendisposes”一句谚语忠实传达了源语文化内涵。通过综合分析关键词Heaven在英语中的文化内涵以及英语本族者的语感证实,杨完益和戴乃迭用Heaven一词并没有像众多论者所认为的那样忠实地传达了源语中的文化内涵。     

自动拼写校对的算法设计和系统实现

在英语作文机器评分中一项重要的环节便是拼写检查与纠错。本文依据实验室的作文自动评分项目,介绍了该项目中拼写检查与纠错模块,详述了该模块为错误单词提供有效纠错建议的算法。此算法主要针对中国大学生的英语拼写错误特点,通过统计CLEC(Chinese Learner English Corpus)中的单词信息而建立了一个基于CLEC的语言模型,以该算法对检查出为错误的单词给出纠错建议,此处的纠错建议即是候选的正确单词列表,位于第一位的就是我们要得到的系统认为最为准确的单词。最后为验证该算法,设计了一个简单的系统(命名为Myspell),并通过实验将该系统与GNU Aspell和Hunspell两个系统进行了对比,进一步肯定了该算法。     

广西产业结构与经济增长关系的协整研究

运用协整理论对广西1978～2007年间的数据进行分析表明:广西经济增长与产业结构之间存在长期的动态均衡关系,经济增长与第二、三产业的发展相互促进,广西经济增长与第二、三产业结构之间互为双向因果关系,广西经济增长与第二、三产业产出在GDP中的比重成同向变动关系,而与第一产业产出在GDP中的比重成反向变动关系;第三产业产出对GDP的影响最大。     

我国黄金期货市场价格发现与套期保值功能——基于ARDL-ECM模型

文章收集了2011-2013年的黄金期货和现货价格数据,采用ARDL-ECM模型分析我国黄金期货价格和现货价格之间的长期均衡和短期动态关系。研究表明:我国黄金期货市场具有完美且有效的套期保值功能,但尚不具有价格发现功能,其运行效率有待提高。     

Efficient estimation of forecast uncertainty based on recent forecast errors

Multi-step-ahead forecasts of the forecast uncertainty of an individual forecaster are often based on the horizon-specific sample means of his recent squared forecast errors, where the number of past forecast errors available decreases one-to-one with the forecast horizon. In this paper, the efficiency gains from the joint estimation of forecast uncertainty for all horizons in such samples are investigated. If the forecast uncertainty is estimated by seemingly unrelated regressions, it turns out that the covariance matrix of the squared forecast errors does not have to be estimated, but simply needs to have a certain structure, which is a very useful property in small samples. Considering optimal and non-optimal forecasts, it is found that the efficiency gains can be substantial for longer horizons in small samples. The superior performance of the seemingly-unrelated-regressions approach is confirmed in several empirical applications.     

Beauty is the promise of happiness?

We measure the impact of individuals' looks on life satisfaction and happiness. Using six data sets, from Canada, Germany, the United Kingdom, and the United States, we construct beauty measures in a number of different ways. Beauty raises happiness: A one standard-deviation change in beauty generates about 0.08 standard deviations of additional satisfaction/happiness among men, 0.07 among women. The finding is robust to a rare opportunity to measure it using an instrumental variables approach. Accounting for a wide variety of covariates, particularly educational, marital, and labor-market outcomes that might be affected by beauty, the gross effects are roughly halved, with small reductions arising from the impact of beauty on monetary outcomes.     

DATUM面控制技术在包边机设计中的应用

在UG平台上进行汽车门盖类包边机设计时，运用DATUM面对各设计者的设计区域进行控制，可以有效地避免各工作者所设计出的主压机构或预压机构出现干涉，也能很好地保证各设计者所设计出的机构之间不出现间隙。文章通过对N300尾门包边机的设计进行分析，阐述了DATUM面控制技术在包边机设计中的运用。     

A preliminary theoretical examination of the targeted public distribution system in India

A theoretical model of targeting in the public distribution system is set out. In any system of targeting there could be inclusion and exclusion errors. These errors could be reduced by search by the state. The state aims to minimise the costs of food administration subject to keeping the magnitude of the exclusion error bounded. Targeting involves a consideration of the objective poverty level, the official poverty level and the targeted poverty level by the state. The targeted poverty level could be less than the official poverty level if the extent of search is not adequate. The objective poverty level is an increasing function of the above poverty line issue price of food due to exclusion errors, a decreasing function of the procurement price of food and by definition the below poverty line issue price of food. The instruments in the hands of the state are the official poverty level, the above poverty line issue price for food, the procurement price of food and the extent of search. The comparative static implications of the model are set out.