卡尔曼预测滤波在脱靶量时滞问题中的应用研究

针对光电跟踪系统中的脱靶量时滞问题,对脱靶量时滞对系统控制性能的影响进行了分析。在机动目标运动模型的基础上提出了可行的预测滤波解决方案,设计了对应的卡尔曼滤波器。仿真结果表明对脱靶量的预测取得了良好的效果。     

A Model of Spatial Arbitrage with Transport Capacity Constraints and Endogenous Transport Prices

This article solves a high-frequency model of price arbitrage incorporating storage and trade when the amount of trade is limited by transport capacity constraints. In equilibrium there is considerable variation in transport prices because transport prices rise when the demand to ship goods exceeds the capacity limit. This variation is necessary to attract shipping capacity into the industry. In turn, prices in different locations differ by a time varying amount. Thus while the law of one price holds, it holds because of endogenous variation in transport prices.     

锁相接收机环路参数选取的一些考虑

本文结合工程实际，推导了某种锁相接收机锁相环传递函数，并就如何选取锁相环环路参数问题进行了分析与设计。     

近10年外商在华直接投资的空间分异及成因分析

首先选取2000—2009年的相关数据分析了我国三大地区FDI的基本情况,然后从投资数量和相对增值率两个方面分析得出我国FDI的空间分异的特征,最后利用2010年的相关数据从市场、产业集聚效应、成本、GDP等4种因素分析了影响我国FDI空间分异的原因。     

Measuring Diagnostic Accuracy of Statistical Prediction Rules

Many different statistical methods have been developed for predicting the disease classes of patients. However, in order to have confidence in the results of such methods, their performance needs to be assessed. Different performance measures are reviewed and the circumstances in which they are relevant are described. Subtleties exist which must be taken into account to ensure that the measure chosen matches the objectives. Examples are given showing different interpretations of future diagnostic performance.     

An examination of the forward prediction error of U.S. dollar exchange rates and how they are related to bid-ask spreads,purchasing power parity disequilibria,and forward premium asymmetry

Using a panel data approach, we find statistically significant evidence that bid-ask spreads and deviations from purchasing power parity (PPP) are related to the forward prediction error of ten major U.S. dollar exchange rates over the post Plaza Accord period. Previous literature suggests that bid-ask spreads proxy for liquidity risk and deviations from PPP are a source of time-varying risk premiums. Additionally, the paper provides evidence that the forward discount bias is asymmetric with respect to the sign of the forward premium as well as to an undervalued and overvalued U.S. dollar.     

激光导向仪在地下厂房高压竖井开挖中的应用

本文主要阐述了如何将激光导向仪应用在厄瓜多尔索普拉多拉地下厂房工程中高压竖井开挖的具体过程中,重点介绍了如何定位、如何消除竖直角i角误差,确保开挖外观质量的精准。     

承包商工程变更调价失误案例分析

工程施工过程中往往牵扯到工程变更,在工程变更使得涉及的工程细目单价不合理或者不适用的情况下,承包商应当按照施工合同文件中相关条款赋予的正当权力,在施工合同文件约定的时间期限内,向监理工程师提出重新定价意向,报请工程业主审批。否则,承包商将丧失依据施工合同文件相关条款所能够获得的正当利益。本文通过一项工程变更的真实案例,分析了承包商失误的原因。     

我国沪深300股指期货价格发现功能的实证分析

我国股指期货的推出对证券市场产生了巨大的影响,改变了股票市场缺乏规避系统性风险工具的现状,给金融市场带来新的生机与活力。本文采用协整检验、误差修正模型、方差分解和脉冲响应函数实证分析了我国股票市场和期货市场的价格发现功能。研究发现股指期货在价格发现上占主导地位,表明我国股指期货的推出,增强了市场效率,使市场信息能够更快捷的传达。     

大型国有企业面临中国入世的空间行为

本文首先分析了中国入世后对国有企业运营环境的影响，接着根据对农机、电气、食品、家用电器、纺织等行业在全国有重要影响的6家大型国有企业调查数据，分析了这些企业在市场发展、技术开发、原材料采购和与区域关系4方面的空间行为。