四部分的

The fourth part is Network Address Translation NAT configuration.

第四部分是网络地址转换NAT的配置。

The chapter 4 is about the condition of administrative law enforcement responsibility in our country.

第四部分是我国行政执法责任制的现状。

In Chapter 4, A detailed comparison between the realization of Cholesky decomposition and OR method is given, a systolic/wavefront array made of general purpose DSP is used to realize the adaptive beamforming at a moderate speed, and a wavefront array to extract the adaptive weights which is necessary in some applications is designed. In Chapter 5, the author proposed a new structure to realize the space time adaptive processing. First 1~q using the FFr and the truncating infinite sequence and sone optimizing method, a much simpler architecture can be acquired in realizing the three portion of channel processing: quadrature sampling, pulse compression and adaptive equalization.

第五章研究并提出了用全通用DSP模块设计空时二维自适应信号处理机的新方案，首先用快速付立叶变换和对长序列截断处理的重叠保留法以大大减少的运算量完成了处理机通道处理部分的正交插值、脉压、自适应均衡三个功能块的长阶数线性卷积运算，接着对自适应波束形成提出了多种实现方案，分析了多种方案下的运算量和设备要求，指出在不同通道数、不同数据吞吐率、不同自适应要求时这几种方案有不同的可行度和实现难度，并针对实际要求确定了一种运算田N、的实现方案，对自适应波束合成部分的大量贝玉以良元组咸肋冈络结拘和处凰闺和羽凶挝娠昨了优化设计以威少设备复杂性，构成了设备量大夕父伯小、们g团回高、辜于生回阴田闩引愧快的空时二维自适囱戏升引毗四机。

The main content of this dissertation includes: 1. Research on the theory of ultrasonic power supply, introduce its development process. On the basis of these, fix on the scheme of medical ultrasonic low-power supply. 2. According to the principle of modularized design, divide medical ultrasonic low-power supply into four parts. They are power amplify circuit, power control circuit, frequency automatic tracking circuit and matching circuit. Separately research on their theories and design their circuits and necessary programs, especially, effectively resolve the problem tracking the supersonic vibration system with a narrow syntony frequency bandwidth and a high swing. 3. The matching experiments gain good result, and prove that medical ultrasonic low-power supply is entirely up to the mustard on intellectualization, wide band of working frequency, steady output and high efficiency.

本文工作的主要内容包括： 1、研究了超声功率电源的原理，并回顾了它的发展过程，在此基础之上确定本文医用小功率超声电源的设计方案； 2、按照模块化的设计原则，将医用小功率超声电源的设计分解为功率放大电路、功率控制电路、频率自动跟踪电路和匹配电路等四个部分，分别研究了各部分的原理，在此基础之上进行了具体的电路设计和程序设计，尤其是有效地解决了对谐振频率带宽窄振幅高的超声振动系统的频率跟踪问题； 3、通过与超声振动系统的各项配合实验，取得了很好的实验结果，验证了医用小功率超声电源完全满足智能化、工作频带宽、输出功率稳定、输出效率高的设计要求。

In chapter 4, basing theories and methods of scientific visualization, and artificial neural network BP algorithm, we integrate the Visual C++, OpenGL graphics library and Excel VBA technique to develop the program of artificial neural network and to make the BP algorithm visually, this program works can be divided into four parts: Using C language to develop program about BP algorithm; Using Visual C++, develop the GUI Interface, make input parameter visually; Using OpenGL graphic technique to display the training sample point in three dimension; at last using Excel DDE technique display the error graphic tables in Excel system In chapter 5, on the view of engineering application, we establish new method of surface reconstruction basing artificial neural network, develop interface program between module and commercial CAD/CAM system, meantime deeply discuss some key problems, for example, setting up the base plane, using the API technique, cutting and editing surface boundary, and also discuss the more compliant problem: how to intersect surface, at end we finish the work of translation from our surface reconstruction module to commercial CAD/CAM system, then make reverse engineering system basing artificial neural network more useful.

第四章基于科学计算可视化理论，依据人工神经网络BP算法理论模型，综合Visual C++，OpenGL图形库以及Excel VBA等多项软件开发技术，编制了人工神经网络程序，实现了BP算法的可视化映射。具体工作分为四部分：利用C语言实现人工神经网络BP算法；利用VisualC++的GUI技术开发图形用户界面，实现参数设置可视化；利用OpenGL图形技术进行三维映射，显示学习样本及训练样本点；利用微软电子表格DDE动态数据交换技术，在Excel上动态显示学习误差曲线图。第五章从工程应用的角度出发，提出了一种新的基于人工神经网络算法的曲面裁剪重构方法，完成了曲面重建模块与通用CAD/CAM系统的接口设计工作，对其中的若干关键问题进行了深入讨论，例如基平面设定、API技术的应用、边界裁剪等问题，同时，对曲面计算中较为困难的曲面相交问题也进行的专门探讨，最终完成了曲面重建模块向CAD/CAM系统的数据传输工作，使人工神经网络逆向工程系统趋向实用。

At the same time, This part elaborate detailedly his transformation of his poems style, from simulate to mature, which relates to his vagabondage .

同时，这一部分对其各个时期诗风的转变进行了详细的阐述，从最初的模拟之作到最终走向成熟，无不与其漂泊的人生有着密切的联系；第三部分对汪元量诗歌创作进行成因分析，揭示出蒙元统治是汪元量诗歌创作的政治动因，宽松的文化环境是他诗歌创作的契机，而"宗唐得古"风尚，则是汪元量诗歌创作的温床；第四部分对汪元量研究中存在的"宋旧宫人诗词真伪"和汪元量仕元两个问题进行了更加全面、更加科学的论述，揭示出王国维先生提出的宋旧宫人诗词为伪作这一观点不能成立。

The aim of this strategy game is simple;drop your black pieces into the grid and try get four pieces in a row before the computer does.

4-in-a-Row 这个战略游戏的目标是简单的；下降你的进到格子的黑色的部分和尝试在计算机前面的吵闹中得到四部分做。

Except the foreword, this paper is divided into four chpaters:Chapter One: the common vivid featrues of dramatic personae in the phyletic biography of people in Shiji. The charater accords with the described methods, it has the obvious feature of kindred, It leans to the type of the figural creation in our country's later gerneration novels.Chapter Tw phyletic biography of people not extrudes the common featrue of drmatic personae but also emphersizes the personality description. The figural creation turns personal description from typical description gradually in the later generation novels, although the same typical charaters have the differnt lookings.Chapter Three: phyletic biography of people stands out the charaters with the typical events, the same charater can appears the differnt phyletic biography of people, it shows the differnt features (This is the commuteritive incarnate in Shiji). The later generation novels figure the charaters with their action, the same character lean to the differnt points, they show their differnt characteristics.Chapter Four: phyletic biography of people has the multiform modality, it includes paratactic description, coherend interclude, cascade rising and so on. The later generation novels use for reference the paratactic in the arrange of polt structure.

除引言外，全文分为四部分：第一章：《史记》各&类传&中&传主&的共同特征鲜明，人物选择符合以类相从、连类相及的方法，&类&的特色极为明显；我国后世小说中人物形象塑造呈现出类型化的倾向；第二章：&类传&在突出传主共同特征的基础上也注重人物的个性描写，传中人物在符合&类属&的前提下自身的特色同时显现出来：后世小说中人物形象塑造逐步由类型化向个性化发展，即便是同一群体的人物也具有各自不同的面目；第三章：&类传&选取传中人物的典型事件来突出人物形象；同一人物可以进入不同的类传中，表现出不同的特性(这是《史记》全书人物塑造上的&互现法&的典型体现)；后世小说中注重选择具有行动性特征的细节来塑造人物形象；同一人物在不同作品中有不同的侧重，呈现出不同的面目；第四章：&类传&结构安排的多样形式，主要有并列分叙、联贯穿插、层叠上升等几种形式；后世小说在情节结构安排上对&类传&的借鉴。

With genre theories from Swales and Bhatia and recent researches concerning academic writing, a cross-cultural genre-based comparative study of the main sections (abstract, introduction, results and discussion) of English research articles from Chinese Medical Community and English Medical Community in the field of cardiology was performed.

本文基于Swales 和Bhatia的体裁分析理论以及近年来语言学领域各种研究成果，对中国医学界和英语国家医学界心脏学科的科研论文的摘要，引言，结果和讨论分析等四部分进行了详尽的分析，并着重对比中国医学界及英语国家医学界心脏学科的科研论文在结构及使用先行词it结构（部分汉语中有替代表达的先行词it结构除外）方面的差异。

In addition, the blank holding force that is required to avoid wrinkle and rupture during conical part deep drawing is researched. The necessity of reasonable blank holding force in pressing is expounded. From the view of mechanical analysis, the wrinkle critical condition of side-wall is derived for the first time by the stress state of side-wall, the main deformation region on blank. According to the critical condition of plastic instability for flange, side--wall, corner of punch on blank, The blank holding force in conical part deep drawing is divided into four different regions within its forming figure. The basic principle of reasonable blank holding force during stamping is summarized and provided. The mathematical model of reasonable blank holding force that avoids the wrinkle and rupture is established and verified by the finite element numerical simulation and the grid experiment method. The result shows that it is accurate and reliable.

此外，本文还研究了圆锥形件拉深成形过程中，随着拉深变形过程的进行，毛坯为避免产生起皱、破坏缺陷而对压边力的需求情况，阐明了圆锥形件拉深成形过程中压边力合理变化的必要性；由毛坯主要变形区悬空锥壁部分的受力变形情况，从力学分析的角度，首次推导得出了圆锥形零件悬空锥壁起皱失稳的临界条件；并根据主要变形区法兰、悬空锥壁及凸模圆角部分的塑性失稳临界条件，在其成形范围图中，将圆锥形件成形过程中的压边力划分为四个区域；总结并提出了圆锥形件成形过程中压边力合理变化的基本原则；建立了防止起皱、破坏缺陷产生的压边力合理变化的数学模式，并得到了有限元数值模拟及网格实验法的验证，证实了理论分析结果的正确性和可靠性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。