数字化

On how to keep the electronic files authentic and aboriginal,the article discuss how to affirm the electronic files' authenticity,and how to adopt technical and management methods to maintain the electronic files' aboriginality.

在档案数字化建设中，如何确保数字化档案，即电子文件的原始性和真实性，保证

A new digital measure method was presented based on the three coordinate measuring machines. Compensation of sensor radius, establish part's measure reference frame, the best measuring layout and mix programmed scanning all those not only enhance measure precision and increase efficiency of scanning measure, but also the data can image geometrical characteristic of complex surface. The method was illuminate by a sample, and the digital data of the surface adumbration are obtained at last

在三坐标测量机的基础上给出了一种数字化测量曲面轮廓的方法，通过测球半径的补偿、坐标系的建立、最佳测量路径的规划以及混合编程扫描，提高了测量精度及扫描测量的效率，而且采集到的数据可以反映曲面的几何特征，并以实例对该方法进行说明，得到了数字化的曲面轮廓数据。

Objective To explore the simulation technology of tooth movement during the virtual orthodontic treatment and help the doctor rapidly design the shape of invisible tooth aligner.

目的：研究口腔数字化正畸矫治中的牙齿虚拟移动仿真技术，为制作透明隐形矫治器过程中一系列母模的数字化建模设计作准备。

On the basis of the theory of option pricing,We study the connection between America call option and European call option;Under the assumption condition of Black-Scholes formula ,use the theory of martingales and stopping time,get the conclusion that: the price of America call option equals the price of European call option; Discuss some numeric computing methods of the put America option pricing, with the invarional inequaility for optimal stopping, prove the boundary property of America put option price ...

基于期权定价的基本理论，研究美式看涨期权与欧式看涨期权之间的关系；在Black-Sc holes公式假设条件下，利用鞅和停时理论，得美式看涨期权的价格与欧式看涨期权的价格相等；探讨美式看跌期权价格的数字化计算，在相关假设条件下，利用基于最优化时的变分不等式证明了美式看跌期权价格的有界性，并介绍了几种美式看跌期权价格的数字化计算方法。

multi-channel correlators are widely used in traditional pseudo-random code cw radar,which makes the ranging system more complicated.this paper proposes a method of digitalizing the return signal directly and then convoluting the signals on dsp,which can replace multi-channel correlation in analog circuit.but the computation of convolution is too huge for the dsp to fulfill.to solve this problem,this paper analyzes five fast algorithms including fft,and then chooses one according to the characters of prc-cw radars.the digital method and fast algorithm have been verified by simulated signal and real signal.

一种提高空间伪码扩谱测距精度的实用。。。摘要：传统的伪码调相连续波雷达采用多路模拟相关电路实现对回波信号的相关接收，通过多路试探搜索各距离单元的目标，电路复杂。提出的数字化方案，对回波信号直接数字化，利用高速dsp实现数字卷积，可替代多路模拟相关电路。但是直接卷积的运算量过大，dsp无法承受。本文对此进行了研究，分析了包括fft在内的五种快速算法，结合prc-cw雷达的具体情况，确定了一种适于dsp实现的快速卷积算法。仿真和实测数据证实了数字化方案及快速算法的正确性。

multi-channel correlators are widely used in traditional pseudo-random code cw radar,which makes the ranging system more complicated.this paper proposes a method of digitalizing the return signal directly and then convoluting the signals on dsp,which can replace multi-channel correlation in analog circuit.but the computation of convolution is too huge for the dsp to fulfill.to solve this problem,this paper analyzes five fast algorithms including fft,and then chooses one according to the characters of prc-cw radars.the digital method and fast algorithm have been verified by simulated signal and real signal.

摘 要：传统的伪码调相连续波雷达采用多路模拟相关电路实现对回波信号的相关接收，通过多路试探搜索各距离单元的目标，电路复杂。提出的数字化方案，对回波信号直接数字化，利用高速dsp实现数字卷积，可替代多路模拟相关电路。但是直接卷积的运算量过大，dsp无法承受。本文对此进行了研究，分析了包括fft在内的五种快速算法，结合prc-cw雷达的具体情况，确定了一种适于dsp实现的快速卷积算法。仿真和实测数据证实了数字化方案及快速算法的正确性。

This paper gives out a design of VOD system based on streaming media technology in the digitized communities according to the characteristics of digitized community, and it can meets consumer's demand. it can also be consulted in the design of VOD system for schools, hotels, cabarets and hospitals.

本文根据现代数字化社区的特点，给出的基于流媒体技术的数字化社区VOD系统设计方案，能满足数字化社区用户的需求，亦适用于网吧、学校、图书馆、宾馆酒店等领域。

Research the techniques of the computer forensics for computer operating system and computer networks.

针对具体的数字化侦查取证，以Windows系统为例，对操作系统的数字化侦查取证技术进行了研究；并结合网络中常见的犯罪行为，分析研究计算机网络的数字化侦查取证技术手段。

And then, they, how to upgrade the technical capability of inverter welding power supply by bringing the dominance of digital control into play fully, and how to realize the soft-switching of power semiconductor devices in the full-load range of inverter welding power supply by making the digital control cooperation with power converter closely, are set forth.

在介绍数字化控制焊接逆变电源内涵和发展历程的基础上，阐述了如何充分发挥数字化控制的优势，全面提升焊接逆变电源的工艺性能，以及如何通过数字化控制和功率变换电路的紧密配合，实现焊接逆变电源的全负载范围功率器件软开关。

The study content of this paper is the remote sensing survey of the soil conservation in the part of Yellow River Basin in Gansu province. Six main influential factors are analyzed.

引 言水土保持数字化是数字化黄河的重要组成部分，利用 TM影像进行水土保持遥感普查，是水土保持数字化建设的重要途径与手段。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。