查询词典 a.d.

Based on the A / D converter the basic principles and characteristics of the broadband A / D converter technology and A / D converter, the choice of a number of exploration and study.

本文基于A/D转换的基本原理和特性，对宽带A/D转换技术和A/D转换器的选择进行一些探讨和研究。

Because of harsh environment that strapdown inertial guidanc e system works in, the conventional accelerator data acquisition systems such as I/F converter and A/D acq uisition have limitations in testing. Therefore, a new method which combing I/F and A/D based on PC104 bus was pro posed, and an ADAS module with the advantages of I/F and A/D schemes was designed.

加速度计是捷联惯导系统的核心部件，由于捷联惯导系统恶劣的工作环境，通常以I/F转换或A/D 采样方案设计的加速度计数据采集系统在测试中均有局限性，因此基于PC104总线提出I /F和A/D相结合的方法，设计了高精度加速度计数据采集系统，该系统同时具有I/F和A/D方案的优点。

The computer separately connects and controls the I/O end and A/D converter; the I/O end connects and controls the X, Y axis driving circuit and the semiconductor laser; the X, Y axis step-by-step driving circuit connects and controls the X, Y step-by-step electrical machines to control the dimensional platform; the beam of the semiconductor laser passes through the focusing drawtube with 0.1mm diameter to form the facula with the diameter less than 0.1mm; the facula irradiates on the detector surface of the XY dimensional displacement platform to produce the corresponding electric signals; the detector surface connects the A/D converter through the amplifier; the electrical signal is amplified and is converted into the data signal by the A/D converter and is sent to the computer for processing.

由计算机分别连接并控制I/O端口和A/D转换器，I/O端口分别连接并控制X、Y轴步进电机驱动电路和半导体激光器，X、Y轴步进电机驱动电路分别连接并控制X、Y轴步进电机，从而控制二维位移平台，半导体激光器的光束经过设有直径0.1mm小孔的聚焦镜筒形成＜0.1mm直径的光斑，光斑照射于设在XY二维位移平台上的探测器表面使其产生响应的电信号，探测器表面经放大器连接A/D转换器，电信号经放大器放大后，由A/D转换器转换为数据信号送计算机处理。

The single a machine that should design to adopt serieses MCS-51s primarily conduct and actions main a measurement for, passing spreading feeling machine to the current of air measuring, its change is homologous pulse signal, this pulse signal through A/ D conversion with D/ A conversion after produce the certain electric voltage signal, will show the inceptive pulse signal a discharge for representing to come out at the same time.

该设计主要采用了MCS-51系列的单片机作为主要的芯片，通过传感器对燃气流量的测定，将其转变为相应的脉冲信号，这个脉冲信号经过A/D转换和D/A转化之后产生一定的电压信号，同时会将起初的脉冲信号所代表的流量显示出来。

This invention relates to a DC linear motor digital controller including a central processor circuit, a data memory, a program memory, an A/D conversion circuit, a D/A conversion circuit, a linear shift orthogonal code pulse signal circuit, a signal isolation circuit, among which, the center processor circuit is composed of a special DSP chip controlled by the motor, a complicated programmable logic device CPLD combining with a peripheral expanding circuit, said digital controller fully utilizes the motor to control the special DSP chip to integral DSP kernel CZXLP and the rich external circuit in a single chip to make up of a digital controller for controlling high frequency response DC linear motor with small volume, low dissipation and high reliability.

高频响直流直线电机数字控制器，属于电机自动控制技术领域，目的在于获得快速、高精度往返运动的控制效果，实现高频响直流直线电机的精密位置跟踪控制功能。本发明包括中央处理器电路，数据存储器，程序存储器，A/D转换电路，D/A转换电路，直线位移正交编码脉冲信号电路，信号隔离电路；中央处理器电路由一个电机控制专用DSP芯片，复杂可编程逻辑器件CPLD，结合外围扩展电路组成。该数字控制器充分利用电机控制专用DSP芯片将高性能DSP核C2xLP和丰富的功能外设电路集成在单个芯片上这一特点，构成了一个体积小、功耗低、可靠性高和功能比较齐全的高频响直流直线电机控制用的数字控制器，使系统的整体成本大大降低。

The characters of the system selects 12 - bit A/D chip converter with high sampling rate and high precision to switch the circuit design. Using multiaddress technology finishes the A/D conversion of the multichannel signal.

本采集系统的特点是选用高采样率高精度的12位A/D转换芯片进行A/D转换电路设计，并采用多路复用技术实现了多通道信号的A/D转换，保证了系统的信噪比，提高了系统的测量精度。

Popularised by Davey Graham, who had been inspired by Arabic oud tuning while living in Morocco. D modal tuning D-A-d-g-a-d' is now encountered in Celtic music and contemporary music.

由Davey Graham推广起来的调弦，这个调弦是他在摩洛哥时从阿拉伯音乐调弦中得到的灵感，形式和弦D D-A-d-g-a-d'与赛而特音乐及现代音乐中常常可以碰到。

D modal tuning: D-A-d-g-a-d' and D-A-d-a-d'-d' Popularised by Davey Graham, who had been inspired by Arabic oud tuning while living in Morocco. D modal tuning D-A-d-g-a-d' is now encountered in Celtic music and contemporary music.

形式调弦D D-A-d-g-a-d' and D-A-d-a-d'-d'由Davey Graham推广起来的调弦，这个调弦是他在摩洛哥时从阿拉伯音乐调弦中得到的灵感，形式和弦D D-A-d-g-a-d'与赛而特音乐及现代音乐中常常可以遇到。

In this paper obtains the conclusion by the discrete property of integer: If a, b∈Z+, also a≤b, b-a=d, then d is one of 0,1,…,b-1 in these b integers; Theorem: a | b also a | c to abitrary x,y∈Z, has a | to promote to more sums; By promotes the cancellation from additivity of coresidual; By the prime number is the infinite inferential reasoning continual divisible number also is infinite.

论文中由整数的离散性得到结论：若a，b∈Z+，且a≤b，b-a=d，则d为0，1，，b-1这b个数中的一个；将定理：a | b 且 a | c 对任意的x，y∈Z，有a |推广到更多项的和；由同余的相加性推出相减性；由素数的个数是无限的推导出连续合数的个数也是无限的。

A two-step A/D converter consists of 2 stages, while a pipe-line A/D converter generally consists of N stages, each including a SHA, an A/D converter, a D/A converter, a subtractor and an amplifier.

采用两步A / D转换器由2阶段，而管线A / D转换器一般包括氮阶段，每一个包括沙， A / D转换器，一个D / A转换器，一个放大器。

Graf, without question, is the greatest women's player in history.

格拉芙，现在，毫无疑问是女子网坛历史上最伟大的选手。

If not, you will have to look around at all your important data.

如果没有，您将需要检查所有的重要数据。