在之前的研究中对EMT的成像范围尚未有比较精确的规范,针对敏感场中激励频率与物场特性的变化,利用有限元仿真软件(COMSOL Multiphysics)对EMT系统的激励系统进行仿真分析,不同于传统的对互感值进行研究的方法,选择了更加直观的电压值,最终得出在不同激励频率与不同物...
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system, and thermal system interactions, while still allowing for fast simulations. These assumptions and approximations enable the electrical component models to run at the time scale of the turbomachinery, neglecting the very high frequency electrical dynamics, while demonstrating representative behavior of...
It is often the case that the frequency response data of a network or a system is available and one wants to identify a linear equivalent from the frequency response data for time-domain simulations and other purposes. To this end, a variety of methods have been proposed, and the vector fi...
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(off) DC current gain GI Input resistance R1 - 1.54 2.2 2.86 kΩ Resistance ratio R2/R1 - 0.8 1.0 1.2 - - 250 - MHz Transition frequency f T*1 VO = 10V, IO = 20mA VCE = 10V, IE = -5mA, f = 100MHz *1 Characteristics of built-in transistor *2 Each terminal mounted on a ...
，获得了系统敏感场参数变化与测量值的关系，通过该研究确定了ＥＭＴ系统的有效检测范围，提高了ＥＭＴ系统检测的准确性，更有利于后续进行高质量的图像重建。关键词：电磁层析成像；无损检测；有限元仿真；敏感场，激励频率；物场特性中图分类号 ：ＴＰ３９１ 文献标志码：Ａ 文章编号：１０００－８８２９（...
The muscle contracts 30000 times withhigh frequency and intensity, so asto train and increase muscledensity and volume REDUCE FAT The ultimate contraction of muscle needsa large amount of energy supply, so the fat cells beside the muscle are...
After suppressing disturbing influences, the cylindrical holes between 3 and 5 mm below the surface can be detected with the multifrequency equipment. There are no detection problems for surface breaking defects. Lower frequencies will enable us to increase the penetration depth....
A floor-standing unit that looked like equipment from a '70's sci-fi movie set, the EMT 250's feature set was impressive, with pre-delay controls and high and low frequency decay times. But the 250 was more than a reverb — it was also the first multi-effects unit, featuring ...