But an oak which has fewer but bigger leaves with stronger reflections, produces a jagged wave form, or what we called a rough echo.
但是，橡树的叶子少而又大，反射力较强，会产生参差不齐的声波，或所谓的“粗糙回声”。
The results agree with previous studies that have analyzed single photons whose precursor and main wave form have not been separated, which have reported an oscillatory structure.
结论与先前的研究相同，虽然先前的研究分析的是尚未将前驱和主波分离的光子，它们显示出了一个振荡结构。
Internal solitary waves are a kind of special internal waves, which could bring enormous energy and propagate long distance in the ocean with its wave form basically unchanged.
海洋内孤立波是一种携带巨大能量的特殊内波，它能够在海洋中长距离传播而保持波形基本不变。
Let's now examine the simplest wave form where the profile is a sine or cosine curve.
现在让我们来考察最简单的波形，它的剖面图是正弦或余弦曲线。
The stretch distortion often present itself in wave form when conventional dynamic correction is used.
常规动校正使波形发生拉伸畸变，尤其是浅层更为严重。
Thus, by controlling the pressure wave form, the desired trajectory of the grinding head can be obtained.
因而控制压力的波形即可得到所需要的研磨头的运动轨迹。
It was observed from the low frequency signal on the microwave mixer that the wave form was clear and stable.
观察从微波混频器上取得的低频信号，波形清晰、稳定。
This technique can be applied to the automatic test system requiring the display of multi-channel continuous wave form.
此技术可应用于需要多通道连续波形显示的自动测试系统中。
Tested vibration signal wave form analysis, speed spectrum matrix analysis, and shaft centerline orbit analysis are made.
测得了机组的振动量值，对测得的振动信号进行了波形分析、转速谱阵分析及轴心运动轨迹分析。
The Paper discusses the advantages of DSP used to control motor, the wave form of driving current, and the driving effect.
本文分析了使用DSP控制电机的优点，并给出了驱动电流波形，分析驱动效果。
Utilize the wave form generator of 80c196mc can produce SPWM wave conveniently, and simplify the circuit of the control panel.
应用80c 196MC的波形发生器可以方便地生成SPWM波，简化了控制板的电路。
And it has functions of outputting different analog signals, impulse signal with different frequency, amplitude and different wave form.
同时具有输出各种模拟信号、不同频率和幅值的脉冲信号及各种波形信号的信号源功能。
Electric wave form was one of the key factors in anodizing, and selecting pulse DC power enabled the oxidizing film to have good quality;
结果表明：电源波形是钛合金阳极氧化着色过程的关键因素之一，选择脉冲直流电源可以获得较好的着色膜性能；
For the electrocardiogram wave form, based on the hierarchical structure, this paper presents a characteristic sample and description method.
针对心电波形，本文提出了一种基于层次结构的特征抽取和描述方法。
This paper analyzes and introduces the application study process of solving telescoping seam on the road bridge by wave form telescoping seam.
本文对波形伸缩缝在解决道路桥梁伸缩缝问题中的应用研究过程进行了分析、介绍。
The triggering Angle modulation method of the sine-wave cyclo-converter is carried out, and the operating wave form of the designed system is put forward.
讨论了正弦波输出的交—交变频器触发角的控制方案，实现了双微机控制的交—交变频器的低频控制，给出了实际运行波形。
Changing the wave form of the main current while other experimental parameters being unchanged, the laser spike and the position of background light were contrasted.
在其他实验参量不变的情况下，改变主脉冲电流的波形，比较了激光尖峰与背景光的相对位置。
The influence of the principal parameters of optical chirp reversal devices on ability to restore signal wave form and pulse duration has been analysed and simulated.
分析和数值模拟了用瞬态简并四波混频实现光学啁啾反转的器件的主要参数对恢复信号波形和脉冲宽度能力的影响。
With the aid of CFD, the problem can be studied in detail, but this requires a very large number of points per wavelength to distinguish the wave form numerical errors.
通过CFD的方法能够对问题进行细致的研究，但是要求单位波长上包含大量的网格点来从数值误差中识别声波。
The characteristic and principle of steel bar type energy absorber are introduced, and the wave form reappeared principle of the energy absorber is simulated by LS-DYNA.
介绍了自行设计的汽车模拟碰撞吸能器的特点及原理，利用LS - DYNA有限元分析软件对吸能器的波形复现原理进行了仿真分析。
The leakage of microstrip line has two forms: the surface wave form and the space wave form, and the higher order modes on microstrip line mostly leak as space wave form.
微带线泄漏一般分为表面波形式和空间波形式两类，其中微带线高次模泄漏一般以空间波的形式发生。
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.
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。
The new techniques include oversampling technique in digitalization of seismic wave form, spectrum contraction technique in data - transmitting and error-controlling and so on.
这些新技术包括地震波形数字化的过采样技术，数据传输中使用的紧缩频谱调制技术和差错控制技术等。
Since a partial discharge pulse waveform is irregular and the spectrum of each pulse is different, a pulse wave form will be distorted at the measuring terminal of the circuit.
由于局部放电脉冲波形是不规则的，显然，它们的频谱是不同的，这将导致在测量点上脉冲波形的畸变。
The present invention has small volume, large output power, less distortion in output wave form and high efficiency and is esp. suitable for large program controlled exchanger.
本发明体积小，输出功率大，输出波形失真小，效率高，特别适合用于大型局用程控交换机。
Simulation tests are implemented, and the results indicate that coupling inductance has a dramatic effect on reducing the electric current ripples and improving wave form factors.
进行了仿真验证，仿真结果表明：耦合电感对减小电流纹波，改善波形系数有很好的效果。
The significant factors which exert an influence on instantaneous fluctuation of motor current are in sequence :Vari-speed wave form, vari-speed amplitude and vari-speed frequency.
在变速参数中影响电机瞬时电流波动最为显著的因素依次为变速波形、变速幅度和变速频率。
Transmitter is the device which changes electrical pulse signal into optical pulse signal, and then transmit the optical signal in wave form by laser diode or light-emitting diode.
光发射机的功能是将电脉冲信号转换成光脉冲信号，并以数字光纤通信系统传输性能所要求的光脉冲信号波形从光源器件的尾纤发射出去。
The discrete time mathematical model of a switched TIG welding power source is established. The arc ignition process, its property, current wave form and arc stability are analysed.
本文建立了开关式TIG焊电源的离散时域数学模型，分析了电弧引燃过程、引弧性能、电流波形特点和电弧稳定性。
The discrete time mathematical model of a switched TIG welding power source is established. The arc ignition process, its property, current wave form and arc stability are analysed.
本文建立了开关式TIG焊电源的离散时域数学模型，分析了电弧引燃过程、引弧性能、电流波形特点和电弧稳定性。
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