推导了以顺波、逆波为状态向量的应力波传播方程和杆形部件的作用力、速度传播的特征矩阵；
Stress wave propagation equations that incident wave and reflection wave are condition vectors are derived from three discrete forms as well as the characteristic matrix of the force and the velocity.
然后把这种数值解方法分别运用到所有频率的单色波即可就出其对应的光场，而且对所有的这些数值解作逆付里叶变换就可以将其转换为时间领域的光场。
Such numerical solution is iterated for all the waves with different frequencies, and all the numerical solutions are transformed into the light fields in the time domain by inverse Fourier transform.
研究了多重化逆变器的一种控制方法，采用逆推的方法确定各单元的触发脉冲，通过多重移相叠加原理得到正弦波输出。
A new control method of multiunit inverter is described, which determines the triggering pulse for each unit to obtain the sine wave output through multiple-phase shifting superimposition principle.
理论上，作为太赫兹波产生的逆过程，有可能实现用空气作为介质探测脉冲太赫兹波。
As its reciprocal process, in theory, it should be possible to use air as the sensor to detect pulsed THz waves.
通过从如何减小逆变器的装置容量入手，根据矿井提升机的工艺特点，给出了斩波串级调速系统逆变变压器容量的设计方法。
From the angel of minimizing the inverse transformer capacity, a method to design inverse transformer capacity based on the technical features of mine-well hoist was given.
本文对国际和国内基于电磁波（声波，弹性波）逆散射理论研究缺陷识别的有关方法给予了全面的评述。
The relating to methods based on the research on international and domestic electromagnetic wave(elastic wave, acoustic wave) for the identification of flaws are all-round viewed.
提出了一种由斩波电路与全桥逆变电路构成的电压型大功率晶闸管全桥逆变主电路。
A voltage type high power invert circuit which is composed of chopper and thyristor full bridge invertor is proposed.
采用神经网络逆控制的思想设计小波神经网络控制器，引入多步预测性能指标函数对控制器权值进行在线训练。
WNN controller with the idea of neural networks inverse control is applied. Using multi-step predictive index function to train the weights of controller.
采用了直流斩波和全桥逆变技术，以IGBT为直流斩波元件、IPM模块为全桥逆变元件实现了高压电源的高效小型化。
With technology of DC chopper and H-bridge inverter used, IGBT is used as DC chopper and IPM is used as H-bridge inverter to realize a small volume of the power source.
采用频域正则化求逆和小波域维纳滤波去噪的方法对已知线性降晰模型的含噪图像进行图像复原。
Image is restored which is blurred by the known linear model and noise, with the method of frequency-domain regularized inversion and wavelet-domain wiener filter denoising.
本文介绍了新型开关元件IGBT管作为逆变开关元件的交流矩形波逆变器的原理。
The principle of square wave inverter using IGBT switch devices was introduced.
双感应测井在油田现场应用非常普遍，其数据反演属于非均匀介质中电磁波逆散射问题范畴。
Inversion of dual induction logging measurements belongs to the category of electromagnetic inverse scattering in nonhomogeneous media.
首先通过对并网逆变控制策略的对比与分析，采用三角波比较方式的电流跟踪方式作为课题的控制方式。
First, compare and analysis the grid inverter control strategy, using triangular wave comparison method of the current track approach as the subject control mode.
该文采用小波矩量法求解导电平面上的三维腔体散射，利用小波变换稀疏化矩量矩阵，加速其求逆，减少了腔体散射的总体计算时间。
Scattering from three-dimensional cavities is solved using the wavelet-MoM method, while the moment matrix is sparsified with help of the wavelet transform.
方法用对比的方法分析窦律下和心动过速时12导联体表心电图，找出心动过速时逆传P’波在不同导联的位置及与QRS波的关系。
Methods We compared the surface ECG in 12 leads during sinus rhythm with tachycardia, and tried to find the relation between the different locations of retrograde P' wave and QRS complex in all leads.
硬件设计部分主要有整流、斩波和逆变各个功能模块电路、驱动电路的设计以及参数选择等。
Hardware design mainly covers inverting, commuting, buck and every function module electrocircuit inverting and electrocircuit driving and so on.
双重逆变高速控制电流波形，电弧稳定性极高，高品质矩形交流波，降低焊接成本，提高焊缝质量。
High speed dual inverter to control the current wave form, very high arc stableability, high quality AC square wave, decrease the welding cost and increase the weld quality.
晶闸管三相半波可控整流与逆变电路的电压波形是不同的，而共阴极接法与共阳极接法的波形又有所不同。
The wave shape of Voltage in 3-phase controlled rectification is not as same as it does in circuit. The wave shape of common-cathode circuit is also different with that of common-anode.
以弹性波为重点，评述了三锥散射算子关系及其在逆散射中的应用。为便于理解，在介绍过程中，还仔细描述一维球对称情况下散射矩阵和逆散射方程推导。
The three-dimensional scattering operator formulations with application in the three-dimensional inverse scattering are reviewed with emphasis on the elastic wave case.
电源系统采用双核核心控制器，以dsp- TMS320 LF 2407为核心处理器，以P 89c54单片机为辅助处理器。DSP的3路PWM分别对斩波与逆变电路的IG BT进行驱动。
The system with binuclear as the core controller used DSP TMS320LF2407 as the core processor and takes P89C54 single chip microcomputer (SCM) as the assisted processor.
电源系统采用双核核心控制器，以dsp- TMS320 LF 2407为核心处理器，以P 89c54单片机为辅助处理器。DSP的3路PWM分别对斩波与逆变电路的IG BT进行驱动。
The system with binuclear as the core controller used DSP TMS320LF2407 as the core processor and takes P89C54 single chip microcomputer (SCM) as the assisted processor.
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