The natural frequency, damping ratio and mode shape of a multi-degree-of-freedom system are analyzed and the identified results are in good agreement with the theoretical values.
并针对一多自由度系统具体论述了固有频率、阻尼比和振型的识别方法，识别结果与理论结果吻合较好。
The Linear Frequency Modulated Continuous Wave (LFMCW) Radar has high theoretical range precision and can be used for range tracking.
线性调频连续波(LFMCW)雷达在理论上有很高的测距精度，可用于对目标的距离跟踪。
The orthogonal sampling demodulating technique for low frequency time-code signal is introduced. Based on the theoretical analysis about its principle and implement method, The simulation is tested.
作者提出低频时码信号的正交扫描解调技术，从理论上分析了正交扫描原理和实现方法，并进行了仿真测试；
The theoretical and experimental results are presented, which show the low axial ratio and low loss characteristics over octave frequency band of the polarizer.
给出理论和实验结果，证明了这种四层曲折圆极化器可以在倍频程范围内得到良好的低轴比、低损耗特性。
Based on the model, analysis and revising in frequency domain, several parameters are taken around the theoretical revising parameter, both resistance load and welding experiments are carried out.
在此基础上用频域法进行分析和校正，在理论校正参数附近取多组实际校正参数，分别进行电阻负载实验和焊接工艺实验。
The theoretical results show that for TM waves there exist frequency passband (s) and stopband (s) which can be switched into each other by varying the power.
理论分析表明，非线性TM表面波存在频率通带和禁带，通过调节导波功率可以实现通带和禁带之间的转换。
This paper presents systematic theoretical calculations and the experimental investigations of the doubling frequency character of the crystal KN grown in China.
本文首次对我国生长的铌酸钾晶体的光学倍频特性进行了系统的理论计算和实验研究。
The L-moment method has theoretical advantages in hydrologic frequency analyses, but less practical application because of its complexities in calculation.
线性矩法在水文频率分析中具有理论优势，但因为计算复杂而实际应用较少。
The natural frequency and the natural mode of vibrating screen have been calculated by the software for FEM, proposes the theoretical basis for the design of large-sized vibrating screen.
通过有限元软件计算出了筛体结构的固有频率、固有振型，为振动筛的大型化设计提供了理论依据。
A four frequency eddy current inspection instrument was developed based on theoretical analysis and simulative tests.
在理论分析和大量模拟试验基础上研制了四频涡流检测仪。
Transmission parameters such as numerical aperture and normalized frequency of the fabricated holey fibers have been measured and compared with theoretical values based on effective index method.
测量了拉制成的有孔光纤的数值孔径和归一化频率等传输参数，并基于有效折射率方法与理论值进行了比较。
By analyzing the direct frequency modulation and optical feedback effect of laser diode, a theoretical model for measuring small vibration displacement and velocity is discussed.
分析了在直接频率调制下，激光二极管中的光反馈效应，探讨了振动微小位移和速度的理论模型。
In this paper the theoretical analysis for this circuit is conducted, its transient is studied, oscillating frequency is determined and its characteristics is analysed.
本文主要对此电路进行理论分析，研究其暂态过程、确定振荡频率和分析其特点等。
The model types include frequency histogram, cumulative frequency distributing graph and theoretical model with double logarithmic coordinates.
模型类型包括频率直方图、累积频率分布图及双对数坐标表示的理论分布模型。
As an example, a resonant loop is composed of forward differential FDNR circuit. The experiments show that the characteristics of its frequency response coincide with the theoretical analysis.
作为文中的一个例子，用FD - FDNR电路组成一个谐振回路，实验表明其频响特性与理论分析相一致。
It is found that the analysis results are coincident with theoretical expectation well, which provides references for the measurement of electro motors' natural frequency.
实验数据与理论结果较为一致，证明该实验方法是测定电动机的固有频率的有效方法。
The natural frequency of oil derrick changes with the changing of the load it bears on, this character of oil derrick is the theoretical basis for establishing the dynamic evaluating method.
石油井架的固有频率随所受荷载的变化而变化这一特性，是建立石油井架承载能力动态测评方法的理论依据。
The fixed frequency sample PWM method is put forward in this paper together with the theoretical analysis about their switch strategy.
本文提出恒频采样电流跟踪型PWM方式，并对其开关策略进行了理论分析。
The paper makes a theoretical analysis of the speed frequency response function excited by the tread and flange of the resilient wheel.
文中对弹性车轮踏面、轮缘激励下的速度频响函数进行了理论分析。
The optimum value of ball-to-powder weight ratio has been deduced from theoretical relationship between frequency, speed of collision and ball-milling conditions.
由碰撞频率、速率与球磨工艺条件的理论关系推导出了球料比的最佳值。
It is made clear through the theoretical analysis that the frequency shift is dependent on the modulation frequency, thermal time constant, bias current of the laser diode and so on.
理论分析表明频移幅度与调制频率、时间常数和半导体激光器的偏置电流等物理量有关。
The theoretical analysis for the frequency stabilizing mechanism is carried out and the concrete adjustment method is described.
对稳频机理进行了理论分析，并说明具体调整方法。
The nature frequency, normal mode and dynamic response of gear system are studied by theoretical modal analysis method combined with experimental modal analysis method.
采用试验模态分析和理论模态分析相结合的方法，研究了齿轮系统的固有特性和动力响应。
A theoretical approach analyzing electrical performance for dielectric loaded du al-layer Frequency Selective Surface (FSS) configuration with dissimilar lattice and element geometries is proposed.
提出了一种研究不同栅格及单元外形并有介质加载的双层频率选择表面（FSS）电性能的理论分析方法。
The effect of Signal-Noise-Ration (SNR) to the estimation of Doppler central frequency has been studied using theoretical method and simulation technique, and results are given in curves.
该文从理论和仿真两个角度研究了信噪比对多普勒中心频率估计的影响，给出了多普勒中心频率和信噪比的理论及仿真关系曲线。
The theoretical conclusions are confirmed by detailed simulations under the situations, such as offsetting, unbalance, harmonic, phase-abrupt and frequency-abrupt.
并通过仿真研究，验证了三相输入信号存在直流偏移、不对称、谐波等干扰情况下，仿真结果与理论推导一致。
Though examples of common signal and sine signal, by the frequency spectrum graph and theoretical analysis, the minimum sample rate of the sampling theorem is made clear.
以一般信号和正弦信号为例，通过理论分析和频谱图示意，对抽样定理中最低抽样率的取值进行了明确的说明。
A formula for analyzing the low frequency instability of the tube grain engine is derived through theoretical study.
通过研究导出一个分析管状装药发动机低频不稳定性的关系式。
The theoretical analyses predict that the drift wave is the most dangerois low frequency instability in the hot electron plasma.
理论上预示了在热电子等离子体中，等离子体漂移波是最重要的低频不稳定性。
The theoretical analyses predict that the drift wave is the most dangerois low frequency instability in the hot electron plasma.
理论上预示了在热电子等离子体中，等离子体漂移波是最重要的低频不稳定性。
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