介绍

Firstly, the basic concept of software/hardware co-design and the present research situation worldwide is introduced, the techniques are also discussed separately in the thesis, which is in the system description stage, system architecture design stage, hardware/software design and implementation stage. Secondly, combined with three representative methods of hardware/software co-design systems: POLIS、VULCAN and CORSAIR, the main steps of co-design are studied and analyzed including system description, hardware/software partitioning and hardware/software implementation-synthesis, and some new ideas are given here. Thirdly, UML and modeling technology of embedded systems using UML are described clearly, a handheld terminals is a good example for this, furthermore, the algorithm of how to convert the UML diagram into SystemC codes is mainly concerned on in this thesis. Fourthly, the basic concept of SystemC is described, and the SystemC Modeling platform and simulation mechanism are analyzed, software/hardware co-design methods using SystemC are discussed. Finally, by applying co-design ideas using UML and SystemC, software/hardware co-design system using UML and SystemC is preparatorily implemented, which is to establish a development environment for designing embedded system.

本文首先介绍了软硬件协同设计的基本概念和国内外研究现状，并分别论述了系统描述阶段的技术、系统结构设计阶段的技术、软硬件设计与实现阶段的技术；接着结合POLIS、VULCAN和CORSAIR 三种有代表性的软硬件协同设计方法，对系统描述、软硬件划分、软硬件实现综合等几个主要设计步骤进行了研究与分析，并提出了新的方法和思路；然后详细介绍了UML及基于UML的嵌入式系统建模技术，并以嵌入式手持终端系统来举例说明，重点研究将UML的视图转换成SystemC代码的算法；其次介绍了SystemC的基本概念，分析了SystemC 的建模平台和仿真机制，并对基于SystemC 的软硬件协同设计方法进行探讨；最后应用基于UML和SystemC的软硬件协同设计的设计思路，初步实现基于UML和SystemC的软硬件协同设计的设计系统，目的是建立一个用于嵌入式系统设计的开发环境。

This dissertation introduces the developmental situation on domestic and international salinity measure technology, fully analyzes and elaborates the principle of salinometer, especially introduces the key technology and the difficulty in salinometer.

本文介绍了国内外盐度测量技术的发展状况，全面分析、阐述了盐度计的工作原理，特别分析了关键技术和技术难点，并详细介绍了盐度计的整体方案、硬件电路和软件功能的设计，最后介绍了盐度计的试验情况。

There are five chapters and three annexes in this thesis.

第1章，介绍了数据采集的基本原理，对数据采集涉及到的概念做了较为详细的介绍，同时也介绍了ADC相应的技术指标。

This paper's work is trying to present a more efficient method to locate the agent in distributed networks on the basis of pioneers' researches, and assess the performance of this method.This paper begins its discussion with agent technology's background and basic conceptions, characteristics, and presents the researched problem, that is, researching new agent locating method; then introduces several traditional locating methods: brute force searching, database method and path proxies, and analyses their features and locating efficiency. For describing the agent locating better, this paper formalizes the agent, presents a proper definition, and abstracts agent's migration process, proposes a metaprocess concept and decompounds migration process with it.

本文首先介绍了代理技术的产生背景以及基本概念、性质，提出了需要解决的问题，即对新的代理定位的方法的研究；然后总结介绍了前人文献中的一些代理定位方法：穷举搜索法、位置数据库法和迁移指针法，并分析了这些算法的优缺点和代理定位效率；为了更准确的描述代理定位，本文对代理进行了形式化，确定了一种适合的代理定义，并对它的性质给予形式说明；在此基础上抽象出代理迁移的本质，根据它对资源的控制对迁移类型进行分类；提出元过程概念，并分解表示定位过程，并介绍了过程时间连续性。

This thesis mainly deals with the packet filter firewall by applicating Netfilter on the basis of Linux, consisting of seven parts: first, it generally describes the firewall; second, it introduces the exploiting platform Linux and the software debug environment; third, it simply analyzes some networking protocols; fourth, it analyzes the network attacks and their defensing measures; fifth, it describes the most important part of the thesis--the analysis of netfilter's frame and the exploiting and designing process of the firewall; sixth, it introduces the design of the device drivers of the Linux which is the theory base of exploting the user's interface ; the last part is the applicating guide of its exploiting process.

本文介绍了运用Netfilter防火墙技术，在LINUX环境上实现包过滤防火墙的方法和过程，在内容上主要包括了七个部分：第一部分对防火墙的概述；第二部分则介绍此次开发的平台LINUX和软调环境；第三部分对几种网络协议做了简单的分析；第四部分分析了网络攻击及其防御措施；第五部分则是本次设计的核心部分Netfilter框架分析以及防火墙的开发设计思路；第六部分则介绍LINUX设备驱动程序的设计，它是开发用户接口部分的理论基础；最后则是所开发程序的使用说明部分。

This thesis mainly deals with the packet filter firewall by applicating Netfilter on the basis of Linux, consisting of seven parts: first, it generally describes the firewall; second, it introduces the exploiting platform Linux and the software debug environment; third, it simply analyzes some networking protocols; fourth, it analyzes the network attacks and their defensing measures; fifth, it describes the most important part of the thesis--the analysis of netfilters frame and the exploiting and designing process of the firewall; sixth, it introduces the design of the device drivers of the Linux which is the theory base of exploting the users interface ; the last part is the applicating guide of its exploiting process.

本文介绍了运用Netfilter防火墙技术，在LINUX环境上实现包过滤防火墙的方法和过程，在内容上主要包括了7个部分：第1部分对防火墙的概述；第2部分则介绍此次开发的平台LINUX和软调环境；第3部分对几种网络协议做了简单的分析；第4部分分析了网络攻击及其防御措施；第5部分则是本次设计的核心部分Netfilter框架分析以及防火墙的开发设计思路；第6部分则介绍LINUX设备驱动程序的设计，它是开发用户接口部分的理论基础；最后则是所开发程序的使用说明部分。

This thesis mainly deals with the packet filter firewall by applicating Netfilter on the basis of Linux, consisting of seven parts: first, it generally describes the firewall; second, it introduces the exploiting platform Linux and the software debug environment; third, it simply analyzes some networking protocols; fourth, it analyzes the network attacks and their defensing measures; fifth, it describes the most important part of the thesis--the analysis of netfilters frame and the exploiting and designing process of the firewall; sixth, it introduces the design of the device drivers of the Linux which is the theory base of exploting the users interface ; the last part is the applicating guide of its exploiting process.

本文介绍了运用Netfilter防火墙技术，在LINUX环境上实现包过滤防火墙的方法和过程，在内容上主要包括了七个部分：第一部分对防火墙的概述；第二部分则介绍此次开发的平台LINUX和软调环境；第三部分对几种网络协议做了简单的分析；第四部分分析了网络攻击及其防御措施；第五部分则是本次设计的核心部分Netfilter框架分析以及防火墙的开发设计思路；第六部分则介绍LINUX设备驱动程序的设计，它是开发用户接口部分的理论基础；最后则是所开发程序的使用说明部分。

Based on how various national and international performance evaluation systems be used in cooperation, and after introducing of various performance evaluation systems, analyzing the advantage and disadvantage of each system, especially introducing the advantage and disadvantage of balance scoring card, economic added value, performance evaluation guide inside cooperation and other evaluation system, meanwhile, reviewing the performance evaluation systems used by Yingkou Port in the past, introducing the performance evaluation system used by Yingkou Port at present, this article is to design a new performance evaluation system for Yingkou Port after disusing and referencing above systems.

本文围绕当前国内和国外的各种业绩评价方法如何用于企业集团的绩效评价，通过对各种评价方法予以介绍，并对其特征和优缺点进行分析，尤其是介绍平衡计分卡、经济增加值、企业集团内部效绩评价指导意见等评价方式的优缺点，并对营口港沿用的业绩评价方法进行回顾，介绍营口港现有的业绩评价方法，来探讨借鉴各评价方法来重新改进营口港业绩评价体系。

And then, the paper also introduces the simulation tool software MATLAB which is used in the project, and introduces each module of OFDM including the channel coding, interleaves, modulation, the fast Fournier transformation and the wireless channel in this simulation. Finally, the paper analyzes the flowing diagram of OFDM and carries on the simulations on the simplification module which does not affect the research of the transmission, and then discusses the results obtained from the simulation experiments.

首先介绍了OFDM的历史背景发展现状及趋势研究意义和研究目的及研究方法和OFDM的基本原理基本模型OFDM的基本传输技术及其应用，然后介绍了本课题所用的仿真工具软件MATLAB，并对其将仿真的OFDM各个模块包括信道编码交织调制方式快速傅立叶变换及无线信道进行介绍，最后是对于OFDM的流程框图进行分析和在不影响研究其传输性的前提下进行简化，并且对其仿真出来的数据图形进行分析理解

Beijing 2008, you wait for me, then I will be in the full state of mind, with the most fluent English to people everywhere in Beijing, China, introduced the profound Chinese civilization is introduced, and let the world know about Olympic Games in Beijing, China, understand!

北京2008，你等着我吧，到时我一定会以最饱满的精神状态，以最流利的英语向五湖四海的人们介绍北京，介绍中国，介绍博大精深的中华文明，让世界了解北京，了解奥运，了解中国！

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。