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frequency scanning
    Characteristics of Frequency Scanning in the CW Ring Dye Laser
    连续波环形染料激光器的频率扫描特性
    The frequency scanning range of the cw ring dire laser has the maximum value △λ_(s max) and the minimum value △λ_(s min).
    连续波环形染料激光器的频率扫描范围存在着最大值△λ_s max和最小值△λ_s min。
    (2)Prototype struclural test was carried out on the large scale shaking table. Natural vibration behavior and damping ratio of the structure were obtained with frequency scanning and parameter identification.
    (2) 在大型振动台上进行原型结构试验,通过频率扫描得到结构的自振特性,同时通过物理参数识别求出结构阻尼比。
    It demonstrates the general project of vehicles mutual moving-state detection and control system, which use a frequency modulated continuous wave (FMCW) radar with the antenna replaced by a frequency scanning array as the basis of detecting sensor.
    文中阐述了汽车相互运动状态监控系统的总体方案,使用调频连续波(FMCW)雷达作为探测传感器的基础,并在天线部分作了改进,采用了独立的频率扫描天线。
    The PLL part, made of PD, Loop Filter, Voltage Control Oscillator, is the key circuit of the system to produce steady and continuous frequency scanning signal.
    PLL锁相环路部分主要由鉴相器、环路滤波器、电压控制振荡器构成,产生稳定连续的频率扫描信号,它是本系统的关键电路。
    The system is controlled by a computer which the singlechip is connected with basing on ISA bus interface, and consists of wafer measurement and separation. The frequency measurement system adopts pi-network most transmission method to measure the electrical parameters of the quartz crystals, such as the frequency, the energy and clutter, moreover, it applies direct digital synthesizer(DDS) to produce the wishing frequency scanning signal and stimulate π network, so as to get the resonate frequency, autoeciousness frequency, activity and so on;
    此系统由两个子系统组成,都是以计算机为中心,基于ISA总线接口的单片机控制的测量系统和分选系统:其中测量系统采用π网络最大传输法测量石英晶片的电参数,使用直接数字频率合成器(DDS)生成期望的频率扫描信号并激励π网络的方法,从而获得石英晶片谐振频率、活力、寄生频率、杂波数等参数的测量;
    In chapter3, construct the basic system of weak signal detection, and this base bring forward the approaches that use an array of chaotic oscillators to realize frequency scanning. And consummate this detection theory.
    第三章,构建了检测微弱信号的基本系统,并且在此基础上提出了利用振子阵列对信号进行频率扫描的方法,进一步完善了该检测理论。
    A new method, MPR frequency scanning technique, is used to characterize the film-on-substrate system. The numerical multiparameter estimation is performed using the frequency response of MPR signals.
    首先提出了利用MPR频率扫描测量薄膜热物性的新方法,即利用MPR频响信号同时确定薄膜热扩散率、衬底热扩散率和界面热阻这三个热学参数。
    Q scan,a qualita- tive analysis method,is analogous to velocity scanning or frequency scanning.
    前者类似于速度扫描或频率扫描,属于一种定性分析方法;
    The DOA -finding system dealed with in this paper requires that the localoscillator has high frequency scanning speed and low phase noise .
    对于文中所涉及的宽波段空间谱估计测向系统,它对本振的频率扫描速度和本振的相位噪声都有很高的要求。
    Conduction oscillatory frequency scanning(OFS)on systems obtained under different peptizing rate,the results show that there is conspicuous difference under lower frequency and no difference under higher frequency.
    对不同搅拌速率下的体系进行动态实验频率扫描,其结果是在较低的频率下相差较大,而在较高的频率下达到一致。
    This paper introduces a PLL frequency synthesizer BU2614 combined with a special radio module CAX1019S and a MCU AT89C51, which can realize the FM tuner. The tuner can realize multiple functions, such as automatic frequency scanning, locking, and displaying etc.
    介绍了一种锁相频率合成器 BU2 615 ,结合专用收音模块 CXA10 19S、单片机 AT89C5 1能实现 FM调谐器 ,该调谐器能实现频率扫描、锁定和显示等功能。
    This paper elaborated the measuring system based on ISA bus interface, using the method of π network to measure the electrical parameters of quartz crystal wafer and direct digital synthesizer(DDS) to produce the wishing frequency scanning signal and stimulate π network We can get the resonate frequency,activity,clutter and so on;
    阐述了基于 ISA总线接口的测量系统 ,采用 π网络法测量石英晶片的电参数 ,使用直接数字频率合成器( DDS)生成期望的频率扫描信号并激励 π网络的方法 ,获得石英晶片的谐振频率、活力、杂波数等电参数 ;
    First, the theory of wavelet neural network was introduced. Based on neural network learning method of BP algorithm, the wavelet neural network was applied into alternating current magnetic filed non-destructive testing system based on frequency scanning technology. The useful data of fkws were compressed by abstracting relevant weight factor and the scaling parameter that is forming wavelet base, as well as associated translation parameter.
    首先介绍了小波神经网络理论,并在BP算法的神经网络学习方法的基础上,将小波神经网络应用到基于频率扫描技术的交变磁场测量无损检测系统中,通过神经网络提取相应的权重因子、以及构成小波基的尺度参数和与之对应的平移参数,实现缺陷有用数据的压缩;
    Frequency scanning in the subsynchronous frequency range is performed to calculate the subsynchronous electrical damping characteristics of the unit under subsynchronous frequency, thus the influences of various excitation systems, in which PSS is not equipped or PSSs with different input signals are equipped, on electrical damping characteristics of unit are analyzed, and the effects of parameters of PSS on electrical damping are also researched.
    通过频率扫描计算发电机组在次同步频率下的电气阻尼特性曲线,从而对各种励磁系统在无PSS以及装设不同输入信号的PSS情况下对电气阻尼特性的影响进行了分析; 并分析了PSS参数对电气阻尼特性的影响。
    It is a property for practical application as a frequency scanning antenna since it ensures a stable radiation pattern with little distortions while beam is being scanned.
    对频率扫描天线能保证当波束扫描时,可以保持一个相对稳定不畸变的辐射方向图。
 

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