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- square wave testing 矩形波测试
- Excellent staable are from Ac square wave, avoid high frequency hazard. 交流方波自稳弧性能优异,免除高频危害。
- The concept of square wave and EFT drive unit are introduced in this paper. 本文介绍方波信号发生器及场效应管驱动器的原理与设计。
- When the square wave signal pass the LPF,we can get the sine signal. 经过分析可知,检测过程中的低通滤波器对检测的精度和速度有重要影响。
- Introduce the principle of MOSFET AC square wave inverter power source. 介绍了MOSFET交流方波逆变电源的工作原理。
- The recent advances in ultrasonic guided wave testing technique are summarized. 摘要综述近年来超声导波检测研究的最新进展。
- Square waves, like sine waves, are periodic. 方波如正弦波一样是周期性的。
- Creeping wave testing is an effective supplement to conventional ultrasonic testing. 爬波检测是常规超声波检测的有力补充。
- As an example of the technique, let's compute the Fourier series which corresponds to a square wave. 作为这种方法的一个例子，让我们计算一个方波的傅里叶级数。
- For sine wave, triangle wave, and square wave, the good performance of current output is proved by experiments. 经过实验验证,对于正弦波、三角波和方波,负载输出电流波形跟踪良好。
- The signal thus received will no longer look like a square wave but will be distorted in shape and spread out in time. 这样收到的信号看起来不再象矩形波,而是受到畸变,并且持续时间延长了。
- Experiment showed that Rayleigh wave testing technique was feasible for the evaluation and it was convenient, quick and efficient. 试验发现瑞利波法评价地基强夯效果是可行的，具有方便、快速和高效的特点。
- When the actuator is actuated with a square wave, the corresponding mean velocities are 4.70m/s and 4.22m/s. 该致动器存在两个共振频率;在共振频率下工作;方波分别出现了4.;70m/s和4
- This paper deduces the errors sources from the process of ultrasonic longitudinal wave testing and evaluates its uncertainty. 本文分析了超声波探伤纵波检测的误差来源，评定了在探伤过程中的不确定度。
- In the square wave current welding,the inductance is very important to influence the fomation of square wave A. 在方波交流焊中，电抗器的电感量对方波的形成及电弧的稳定性有着很大的影响。
- The paper deals with the basic principles of the pulsed square wave AC MIG/TIG welding power source. 主要介绍双凹波形脉冲氩弧焊电源的工作原理。
- A device that generates high-frequency pulses(usually a square wave) for purposes of synchronization and event timing. 一种发生高频脉冲（通常是方波）的装置，以达到同步和事件定时的目的。
- Simulation results indicate that an input square wave can be tracked precisely using this feedforward controller. 仿真结果表明，该前馈控制器可以精确跟踪方波输入信号。
- Non-destructive test (NDT) for concrete; inspection, evaluation and appraisal for the quality, flaw, crack and durability of concrete construction; and sound wave test for rock. 咨询专业特长：混凝土无破损检测技术；混凝土质量、缺陷及耐久性检测、评定、鉴定；岩体声波检测。
- A device that generates highfrequency pulses (usually a square wave) for purposes of synchronization and event timing. 一种发生高频脉冲(通常是方波)的装置,以达到同步和事件定时的目的。
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- 农业及相关产业增加值 - the added value of agriculture and related industries
