查询词典 digital

The working principle and the structure of a hybrid magnetic bearing are investigated. The hardware of a digital controller system based on a fixed poind digital singal processor TMS320C25, as well as an A/D and D/A converter is presented.

研究了混合磁悬浮轴承系统的工作原理及其控制器，讨论了以定点数字信号处理器TMS320C25为核心的数字控制硬件系统的构成以及A/D，D/A等外围电路的设计。

Firstly, this paper introduces the principle of digital modulation and digital demodulation simply, as well as the method and the principia of measuri...

其次，详细讨论了矢量信号分析技术，给出了信号分析的一般模型和一些具体的测量分析方法，总结了矢量信号的测量方案和解调分析的原理框架。

The process of digital holography is more flexible and suitable to analyze and measure the experiment result quantitively. Moreover, it helps to store and process images digitally, which makes the application of digital holography wider.

与传统的光学全息相比，数字全息可以消除噪声以及记录过程中底片非线性等因素的影响，整个过程简单，有利于进行定量分析和测量；并且便于图像的数字化储存和实时处理，有利于全息术更广泛的应用。

The first step is reviewing conventional methods of digital beam forming, including WINER method, Steepest-Descent method, LMS, RLS etc. Then , recent digital beam forming methods in the DS-CDMA mobile telecommunications systems are studied, including the algorithm based on least-squares despread respread Multi-Target array, least-squares Despread Respread Multi-Target Constant Modulus Array , Pilot bit LMS-DRMTA algorithm etc.

本文首先简介传统的DBF算法，包括维纳算法、最陡下降算法、最小均方算法、递归最小二乘算法等；然后介绍基于DS-CDMA移动通信系统的DBF算法，包括LS-DRMTA、LS-DRMTCMA导频LMS-DRMTA算法等；最后给出各种算法的仿真结果及分析。

The working principle of a novel short st roke linear DC motor wit h permanent magnet s is presented. Mixed digital - analog cont rol approach based on DSP ( TMS320L F2407A) is proposed. Displacement detecting and cont rol technique are discussed. Displacement detecting circuit s , digital - to - analog converter (DAC7641) expanded circuit s and cont rol software are given.

阐述了一种新研制的短行程永磁直流直线电机的工作原理，提出了基于DSP ( TMS320L F2407A)的短行程直流直线电机数、模混合伺服控制系统方案，重点对直线电机的位置检测及控制技术进行了研究，给出了DSP 控制器的位置检测接口电路、16 位双极性数模转换器(DAC7641)的扩展电路和控制软件的实现方法。

We design hardware logic for salinometer with Quartus II software, and use SOPC Builder to design Nios II, CPU、arithmetical unit、MEMORY、TIMER and other mature IP core are apply to salinometer. We use the hardware description language VHDL to design bottom drives, and make them as customer IP core, such as excitation source IP core、high sensitive digital galvanometer IP core、analog temperature measurement IP core、digital temperature measurement IP core、calendar and time IP core、keyboard IP core、LCD IP core.

使用SOPC Builder软件生成Nios II软核，将CPU、运算器、存储器、定时器等成熟的IP核应用到盐度计设计中，同时使用硬件描述语言VHDL将底层驱动逻辑设计为用户IP核，如激励源IP核、高灵敏度数字检流计IP核、模拟测温IP核、日历时钟IP核、数字测温IP核、键盘IP核、液晶显示IP核等。

This test is the contrast and research on A and magnitude with simulant and digital materials of QiongZhong seismal Monitoring station and materials that State Bureau′s digital networks feedbacks.

就琼中基准地震台的模拟、数字资料，及国家地震局数字台网反馈的资料，进行震相、震级的对比研究。

We have analyzed digital broadband, as well as, long period seismic recordings of this earthquake from China Digital Seismographic Network in different perspectives.

这里，我们用现代数字地震学方法分析了中国数字地震台网获取的这次地震的宽频带和长周期数字地震记录。

Ground motion noises of station bases of 21 ones of 23 Xinjiang digital seismic station are in the range of 1 to 10 Hz, which are qualified to technical regulations of Chinese digital seismographic station network.

新疆23个数字地震台中的21个台的台基地动噪声在1~20比内符合中国数字测震台网技术规程的要求，而另外2个台，即二宫和石河子数字地震台没有达到规定指标。

Both of the principles and their algorithms are tested by digital simulating tests. Finally, in order to simulatively test the protective property of microcomputerbased relay protections, a new power swing digital model is established using the calculation of BPAEMTP. New principles have been put forward in this process to solve two problems: One is to set up a new voltage simulating and control module for a multi-machine system in TACS of BPAEMTP.

应用系统振荡模型可以准确地模拟多机系统的任意实际振荡过程；应用BPAEMTP的振荡中故障模型可以计算任意网络、任意系统振荡过程中的任意故障（任意时刻、任意位置、任意故障类型），还很好地解决了初始稳态问题，此外模型可以计算任意长的数据窗。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。