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The system is composed of trust model, structure and function design, certificate database design, and implements the core functions of a standard CA system including signing, issuing and revoking certificates. The security communication modular of the system is based on the SSL Protocol to enhance the security of system communications. Besides, the kernel functions of the system are packed into DLL library, including symmetrical encryption algorithms, digest algorithms, digital signature algorithms and certificate operations such as certificate request, certificate building, certificate format conversion etc.

本文的主要工作是:在研究PKI相关技术的基础上,设计了企业CA系统方案,包括信任模型、结构和功能设计、证书库的设计;实现CA系统中最为核心的数字证书管理,提供数字证书的签发、注销和发布等各项功能;实现了基于SSL协议安全通信模块,增强了系统通信的安全性;系统采用动态链接库技术封装了对称加密算法、数字摘要算法、签名算法以及证书处理(包括证书请求、证书生成、证书格式转换等功能),以动态链接库的形式提供调用接口,成为应用的安全基础设施。

The paper discuss some pivotal technologies which are used in distribution cooperation exploitation,include directory reflection,network resource manager,work area managing,command explainer,long-distance editor and privilege manager interface.

论述了系统在解决分布式协同开发所使用到的关键技术,这些技术包括目录镜像、网络资源管理器、工作区管理、命令解释器、远程编辑以及权限管理接口。

According to actual condition, a model of wall thickness of rotary kiln is established. The constant coefficients in the model, including thermal conductivity, heat transfer coefficient, Fourier coefficient and contact resistance, are closely calculated. A formula of contact resistance is draw from a great deal of data of surface and inner temperature of rotary kiln. The wall thickness of rotary kiln is simulated by MATLAB. The simulation result is transmitted from MATLAB to DELPHI through a group of interface functions compiled by VC++. The basic graphs-circle and line are analyzed by the means of the technique of Visualization in Scientific Computing and the Bresenham arithmetic, and are realized the visualization of the wall thickness. The contents of communication between master computer and slaver computer are designed and the error control technique, the idea of multi-thread and the embedded assembly language are applied to realize the temperature data transmission and graph transmission, which largely improved the speed of transmission and the reliability and stability of system.

建立了符合现场实际的回转窑壁厚数学模型;结合现场采用红外测温仪测量所得的温度数据和回转窑的实际结构数据,确定出适合该模型的定常系数(包括导热系数、换热系数、傅立叶系数、接触热阻等),并得出与回转窑工况的相近的接触热阻公式ln=T~(0.5154)-36.7868;利用MATLAB软件仿真出回转窑壁厚,并将运算结果通过在VC++的编译环境下编译出MATLAB和DELPHI的接口函数传输到该监测系统中,实现了温度数据的转换和交换;运用科学计算可视化技术和Bresenham扫描转换算法对基本图形——圆和直线进行分析,从而实现了仿真后的壁厚数据可视化;在研究异步串行通信方式的基础上,设计了该系统上下位机功能和通信内容,并运用差错控制技术、多线程思想以及嵌入式汇编语言实现了温度数据和图形数据在上下位机之间的远程传输,提高了数据传输的速率和系统的可靠性、稳定性。

In general, the design work with traditional measures is done by hand, which cannot meet the needs of the technology and manufacture. So the author has developed a CAD hydraulic design software fit for lower specific speed axial flow runner, which is easily operated by users.The main research work of this paper is as follows:1 Analyzing the main reason of axial flow power station cannot work well under littler volume of flow in some season and putting forward an improving scheme, pointing out the characters of design under abnormal factors.2 Combined with the development of the industry in our country, the abnormal hydraulic design method of propeller turbine is discussed based on present literature, data and experiment results.3 Guided by the design method of software engineering, a suit of hydraulic design software of Lower Specific Speed Axial Flow Runner is programmed by the object-oriented programming language Visual Basic and a straightforward, concise and standard Windows human-computer dialogue interface is designed for the system, which makes the operation of the system very convenient.4 ActiveX Automation technology is adopted as the interface with AutoCAD and the hydraulic drawings are edited, modified by AutoCAD until hydraulic model drawings according with the demand of engineering practice are output.5 To resolve practice problem, the author has designed a lower specific speed axial flow runner for Duowa Power Station through an example.

论文的主要内容有:1 深入分析很多轴流定桨式水电站枯水季节小流量下不能发电的主要原因,提出减容改造方案,并指出超常规条件下的改造设计特点。2 结合国情及行业发展需要,参考现有资料、文献和前人的研究成果,进行低比转速轴流式转轮叶片水力设计方法的研究,对轴流式转轮叶片的奇点分布法水力设计进行了全面的探索,结合现代计算机技术,找到了一种针对特殊条件的轴流式转轮叶片水力设计方法。3 仔细比较多种AutoCAD二次开发工具后,结合本课题的特点,选用Visual Basic语言,综合应用软件工程的设计思想,进行低比转速轴流式转轮叶片水力设计软件的编制,为系统设计了直观、简洁和标准的Windows人机对话界面,便于用户操作;编程时在考虑到设计条件特殊性的同时,尽量做到程序的通用性,使之可用于解决同一类问题;另外,大部分程序还可移植到普通轴流式转轮叶片水力设计中,具有良好的适应性。4 利用ActiveX Automation技术与AutoCAD接口,对AutoCAD进行二次开发,在AutoCAD下实现水力图的自动生成和编辑,直至输出符合实际工程要求的木模图。5 通过算例,为多哇水电站设计了一个低比转速轴流定桨式转轮,解决其在枯水期小流量下不能发电的问题。

The speech recognition is a cross-subject, and it is becoming to the key-technology of human-computer interface in information technology.

语音识别是一门交叉学科,正逐步成为信息技术中人机接口的关键技术。

Based on optimizing the interleave algorithm of 3GPP, a turbo encoder is implemented using FPGA technique.

在对3GPP的交织算法进行优化的基础上,基于FPGA技术实现了Turbo码编码器;在对用Max-Log-MAP算法进行优化的基础上,基于DSP技术实现了Turbo码的译码器;最后通过接口实现了一个完整的Turbo码编、译码系统。

Application Programming Interface, and extended analysis of two key API technologies, Parlay and JAIN, is followed.

应用编程接口的技术特点,展开分析了两大API技术??

The design changes the traditional inefficient and high-cost de-sign in signal acquisition and transmission with using a real-time acquisition of DVI display signals and transferring data through the Ethernet port.The design uses a highly integrated FPGA and high-capacity SDRAM,multiplexing of signal package to transfer display data and control data,and efficient algorithm for gray-scale slice as well.It has the features of low cost,large display area,stable display,and high refresh rate.

该设计改变传统设计中低效高成本的信号采集和传送方式,改用实时采集DVI接口显示信号、通过网口传输数据,采用高集成度FPGA和大容量SDRAM,采用信号包复用技术同步传送显示数据和控制数据及高效率的灰度切片算法等新技术,具有成本低、显示面积大、显示稳定、刷新率高等特点。

In order to develop visual mechanical design software with the functions of design computing , database management and automatic graph plotting, this paper studies the multi-platform technologies such as Visual Basic 6.0, Visual FoxPro 6.0, Visual LISP and AutoCAD, in which interface programming, directory structure design and rational use of platforms areincluded.

为开发具有设计计算、数据库管理和自动制图功能的可视化机械设计软件,对Visual Basic6.0、Visual FoxPro6.0、Visual LISP和Auto CAD多平台开发技术进行了研究。该技术主要包括接口程序设计、目录结构设计和平台的合理使用。

In the information era, there are many multimedia equipments in market, people can not use most of them freely. As a cost-effective system, SVS comes to undertake this role by providing professional large-screen display system and intelligent control system in overall. SVS insist to designing and producing large screen system, covering the products that based on projection technology, such as projector, projection TV, plasma, LCD TV, projection screen, video booth, Whiteboard, writing screen, big-screen mosaic system, matrix interface, video conferencing, central control system and other related accessories.Relying on a high level ideal of "creation and practical", with high-quality technology, market development and service team, SVS is in a fast lane of development. Since was built in 2003, has SVS achieved widespread attention and recognition in field, and established a good relationship with IT media, supporting manufacturers and industry research institutions, always thinking customers' demand and provide specific programs by Symposium, three-dimensional-type promotion, performance monitoring and analysis.

信息化时代,多媒体设备层出不穷,让人措手不及,无法真正去灵活运用,搭配出最佳适合用户需求的高性价比系统,SVS勇于承担这个角色,专业成就大屏幕显示系统与智能化控制系统整体方案设计及制造,SVS自始至终以大屏幕为主线,涵盖了以投影技术为基础或依托所开发、搭配或衍生的产品,包括投影机、背投电视、等离子、液晶电视、投影屏幕、视频展台、电子白板、书写屏、大屏幕拼接系统、矩阵接口、视频会议、中央控制系统及其他相关配件或零组件,公司依托一支具备"作风严禁、勇于创新、讲求实效"的高层次、高素质的技术开发、市场开拓及服务人才队伍,SVS正在惊人地快速发展,自创建以来,已经在业内取得了广泛的关注与认同,与IT媒体、配套生产商以及行业研究机构建立了良好的合作关系,始终以客户的需求为中心,帮助客户提供专项设计方案,专题讨论,立体式推广,效果监测和用户分析等各种服务,最大限度地方便客户,为客户提供解决方案,不断满足客户多样化、个性化、复合化的需要,帮助客户以最少的成本获取最大的收益。

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推荐网络例句

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。