设计

The third part on the design of the study and design, and research on the design and implementation of methods of analysis, including set-top box design, function and performance of the identification, design of the hardware platform and software platform design, and other specific aspects of the process.

第三部分阐述了该研究的总体设计思路和设计目的，并就该研究的设计与实现方法进行分析，包括机顶盒的总体设计、功能和性能的确定、硬件平台设计和软件平台设计等各环节具体实现过程。

For the capacity of propeller turbine is often small, people pay little importance on the transformation of reducing capacity under specified conditions. So, nowadays little research mentioned above has been developed.For the particularity of the designed factors, the author has improved the traditional theory, and has fined an available Method of singular point distribution. At present, no one has developed CAD hydraulic design software of lower specific speed axial flow runner in our country.

由于设计条件的特殊性，在研究设计方法过程中，论文基于传统设计理论，对引用的一些基本规律做了一定改进，在具体设计过程中，对经验参数的选择方法做了一定探索，研究与探索运用奇点分布法设计低比转速轴流式转轮叶片；传统的设计工作全部由人工完成，无法满足当今社会科技生产发展的需要，因此论文开发了一套具有人机对话界面良好特点的低比转速轴流式转轮CAD软件。

As illustrated in Fig. 10-1,the initial design activities（such as identification of the design need,formulation of design specifications,feasibility study with collecting relevant design information,and design conceptualization）are part of the synthesis subprocess.That is,the result of the synthesis subprocess is a conceptual design of the prospective product in the form of a sketch or a layout drawing that shows the relationships among the various product components.

如图10-1所示，原始设计活动，如设计需求的认定，设计规格说明的规划，根据收集的相关设计信息进行可行性研究以及设计概念化等，都属综合子过程部分；即综合子过程的结果是各个产品部件间的关系以草图或布局图的形式来表示的所期望产品的概念设计。

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。

Chapter 2, development environment introduction, elucidation development environment of the system;Chapter 3,demand analysis; Chapter 4,system design, carry on total design and function design of the system;Chapter 5,database design and realization, carry on demand analysis(namely the database table design),the logic design(namely the relation of each talbe of database) and the design of the procedure process of the database; Chapter 6,system realization, introduce the carry out of main process of each module in this system;Chapter 7,system test, relate the movement and the test step of the system;Chapter 8,summary and outlook, scan widely future.

第二章是开发环境介绍，说明系统开发的环境；第三章是需求分析；第四章是系统设计，对系统进行总体设计和功能设计；第五章是数据库设计与实现，对数据库进行需求分析、逻辑设计（即数据库各表之间的关系）和存储过程的设计；第六章是系统实现，详细介绍了本系统各个模块的主要部分的实现过程；第七章是系统测试，讲述系统的调试和测试步骤；第八章是总结与展望，放眼未来。

According to the request of adopting advanced technology, the main designing has such contents as below:⑴ Designing the two-fluid nozzle that is based on the theory of air-atomize spraying.⑵ Designing and choosing the type of the axial fan that is used to supply assisted airflow to waft droplets that comes from nozzle.⑶ Designing the swaying outfit that can rotate the spray assembly at a speed and inside a angle in order to satisfy the spray request of different crops, different planting states and improve the uniformity of distribution, the deposition of droplet. Here, we select TYV type reduction gear motor to adjust the swaying speed and use course switch to adjust the swaying angle.⑷ Designing the lift outfit that can adjust the height of the spray assembly to satisfy the request of the crops of different tallness, different spraying range. Here, we select cylinder as the main component that can be used as kickstand and controlled easily.⑸ Designing the switch of the power supply that is put out of the greenhouse in order to prevent worker from poisoning. After the mist sprayer being made, the experiment is made to test the function of the greenhouse mist sprayer fully.

根据采用先进施药技术的要求，本研究的设计内容主要有：⑴采用气液两相流喷雾技术，基于气力雾化原理，设计双流体喷头；⑵采用辅助气流输送雾滴，气流源为风机，对风机进行设计、选型；⑶为满足不同作物、不同栽培情况及提高雾滴分布均匀性、沉积性的施药要求，设计能带动喷射部件在一定角度内、以一定转速的旋转摇摆机构，本研究选用调速电机调节其摇摆速度，并利用反向行程开关调节其摇摆角度；⑷为满足不同高度作物、不同射程的施药要求，设计能调节喷射部件高度的升降机构，这里选用气缸为主要构件，既可以起到整机支架的作用，又可方便进行升降、固定控制；⑸设计行程开关的控制电路以及整机的控制系统。

Twin-screw extruder design should include twin-screw extruder, overall scheme of the types of extrusion system design, the design, the transmission system, the design of the system, heating and cooling system design, the design of control system, etc.

双螺杆挤出机设计应包括双螺杆挤出机类型的确定，整体方案的确定，挤压系统的设计，传动系统的设计，加料系统的设计，加热冷却系统的设计，控制系统的设计等。

The holistic design of the system and resolved the designs of software and hardware based on VXI bus are put forward according to the demand of test system. The hardware and software is designed, including the formation and design of hardware system, visual instrument software architecture, program design for instrument driver, high speed real-time data collection. In the dynamic test program, the idea of"software is instrument"was applied to meet the diverse test demands. Last, it is proposed that the VXI test system be developed to more totalization and networked. The basic theory of system identification was introduced briefly at first. The principle of spectrum analysis system identification based on Wiener-Hopf equation was expatiated. and the questions in applying Peusdo Random signal as spectrum analysis methods stimulate signal was studied, The generation principle of the peusdo random signal is researched, the characteristic of peusdo random are analyzed from time domain and frequency domain, the inverse repeat peusdo random signal is brought forward to make up the shortage of ordinary peusdo random signal. And a new chaos genetic algorithmis presented to solve the unprecise problem of the traditional method. In the servo valve dynamic characteristic test system, the spectrum analysis methods was applied successfully, the servo valve dynamic characteristic could be acquired rapidly and exactly, the test results were analyzed and the ameliorate methods were brought forward at last.

结合航天某集团液压测试中心测试系统的需求，提出了基于VXI总线的液压测试系统的整体设计方案，完成了测试系统的硬件设计与软件设计，包括硬件系统构成与设计、虚拟仪器软件结构、仪器驱动程序设计、高速同步实时数据采集等内容；以伺服阀动态特性测试为例设计了测试模块，该模块体现了VXI总线仪器软件开发所倡导的"虚拟仪器"的思想，以软件的灵活应用满足了不同的测试需求；结合自动测试系统的发展，研究了VXI测试系统与网络技术结合，实现各种软硬件资源共享，进一步提高设备及数据的利用率和系统的扩展性，使自动测试向综合化、网络化方向发展；研究了伪随机信号作为谱分析法辨识的激励信号时存在的问题，讨论了伪随机信号的产生机理，从频域和时域分析了伪随机信号的性质及其应用，提出了用逆重复伪随机信号弥补了普通伪随机信号的不足，并以混沌遗传算法对逆重复伪随机信号产生过程中的参数进行优化，可以更合理而不是凭经验产生需要的逆重复伪随机信号。

On the base of studying application methods and relative information of the relative chips, the paper designed the system hardware ,including LCD interface designing、video gathering chip and its peripheral circuit designing、FPGA chip and other module interface designing; 3、The LCD controller module、video in controller module、configuration initialized module of the video image decode chip、FPGA and program of module interface were all compiled and debugged in the paper. 4、The whole system debugging was carried through, and the video image data storage and displaying on LCD screen was carried out in the paper. The paper first designed the system frame, then designed hardware platform according to the system frame and then analyzed it、debugged it, finally,compiled the module code and debugged the whole system to achieve system requirements.

本文具体研究工作主要体现在以下几个方面： 1分析了的嵌入式视频图像采集、处理与LCD显示系统的总体需求，设计了基于NIOSⅡ的嵌入式系统总体架构； 2在学习相关芯片的具体应用方法和相关知识的基础上，设计了系统的硬件，包括LCD接口设计、视频采集芯片及外围电路设计、FPGA芯片和其他模块接口主板设计； 3编写并调试了LCD控制器模块、视频输入控制器模块、视频解码芯片初始化配置模块、FPGA和各个模块接口程序； 4进行了整个系统的联调，完成了视频图像数据存储并通过LCD显示；本文首先建立了系统架构，然后根据系统架构进行硬件平台的设计并对硬件平台进行分析和调试，最后编写个模块代码并完成系统联合调试实现系统要求。

Based on its sound investment philosophy, strict decision-making procedure and steady running style, BOHO provides series of project solution and operating services for global capital and hi-tech possessors, dedicated to seeking cooperative opportunities for global capital, technology, market, facilitating their successful combination, innovating growth mode of enterprises, accumulating fortune for stakeholders.

高新技术产业化方案设计运作、商业模式与制度设计、产权交易与并购、资源外包与合作服务、整合推广与营销服务、跨国公司项目合作、融资模式设计与运作、 IPO 方案设计与运作、全球整合与资本运作，风险、战略、私募等资本导入，各类资本投资方案设计与运作，资本结构与组合层次方案设计，政府与民间项目招商引资服务，投资关系冲突与危机管理服务。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。