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The paper briefly introduces the state of the art of anti wind systems for the naval ships and presents the theoretical model of the wind hawser pulling force buffer and per warning system as well as the importance of the pre warning system.

本文简要介绍了舰船防风系统的现状、防风缆拉力缓冲与预警系统的理论模型及其预警系统的优点。

In this dissertation, the history of digital TV is briefly reviewed and US Grand Alliance HDTV system is introduced.

本文简要回顾了数字电视的发展历史，重点介绍了美国大联盟的高清晰度电视系统。

In general, this paper includes several parts, shown as the following: The first part summarizes the background and outline of stock index future and introduce briefly its local status and CSI 300 stock index future contract. The second part has a retrospect of the main academic papers of both local or overseas, and also a discussion of relevant hedge strategies and models, to lay a solid theoretical foundation for the empirical analysis and test for the operation process of hedge in latter parts. The third part outlines the principle, key factors and real operation process of hedge. Moreover, it makes a empirical analysis on popular hedge models with HK Hang Seng index. In the end, it test the hedge effect of trading on IF0706, CSI 300 stock index future contract, with CCB select-growth securities fund as present underlying. The fourth and also the last part, explores how to define hedge ratio in china mainland market. It includes the stability test ofβfor local securities portfolio, adjustment of historicalβand best data length for estimation of historicalβ, etc. Also, the thesis makes some beneficial experiments on the definition of best data length for estimation of historicalβ, survey of fashion forβand variation for industryβs. Fortunately, it's got some meaningful results.

按照以上研究思路，本论文论述由以下几个部分构成：第一部分，简要概述股指期货产生的背景和基本情况，对国内股指期货进程和沪深300股指期货合约进行简单介绍；第二部分，回顾海内外股指期货避险研究的主要文献，讨论相关避险策略及避险模型，为后面套期保值策略如何有效运用的实证分析和检验提供理论基础和依据；第三部分，对套期保值的原理、关键因素及实际流程进行概述，并采用香港恒生指数对常用的几种避险模型进行实证分析，最后一揽子以建信优选成长股票型基金为现货标的，实际检验以沪深300股指期货模拟交易IF0706产品进行对冲时的套期保值效果；第四部分，探讨国内确定避险比率的过程，包括国内股票组合β值的稳定性检验、历史β值的修正及估计历史β值的最佳数据长度等，通过数据分析，本文在寻找估计β值的最佳数据长度和考察风格、行业β值的差异上做了较为有益的尝试，并得到了有助于现实操作的结果。

She also briefly dated Jimi Hendrix in Spain.

她还简要月亨德里克斯在西班牙。

Here it will be sufficient to trace briefly the history of the heresy.

这里不仅将有足够的追查简要历史的异端。

1This paper introduces principle of high-tension impulse circuit briefly and expatiates every parts of the system.

首先，本文对电击枪高压脉冲电路的原理作了简要描述，阐述了系统各部分的工作原理。

The application scope of high-tension separator should be briefly introduced.

简要介绍高压电选机的应用范围，然后详细说明高压电选的原理。

S. Eliot was briefly a schoolmaster at Highgate School and Thomas Hardy once lived in Tooting.

发现狄更斯在《双城记》中以其为本所描述的酒馆；去探访威廉。

Appearing briefly in his own films was a trademark of Alfred Hitchcock.

在自己的影片里短暂露面是阿尔弗雷德·希区柯克的特点。

This paper briefly introduces the homotopy theory and algorithm of tracking zero curves. At the same time, the paper gives the example of the impedance inversion in the seismic exploration. In the end, the advantages and disadvantages of the homotopy method are pointed out in this paper.

本讲座概要地介绍了同伦方法的基本原理，跟踪同伦曲线的具体算法，并给出了同伦方法在地展勘探波阻抗反演中的应用实例，最后归纳总结了同伦方法的特点及目前存在的不足。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。