Based on T type filter, the new ballast can achieve a wide dimming range with a very narrow frequency variation range, and it can operate with low lamp current crest factor.
基于T型滤波器的调光方法，能在很窄的工作频率范围内实现深度调光，同时具有灯电流波峰因数低的优点。
2
CT scans of Parasaurolophus' crest reveals the animal likely trumpeted low-frequency sounds that traveled well within a dense forest environment.
用CT扫描副栉龙的冠饰，我们会发现这种动物会发出低频音，可以传向浓密的丛林深处。
3
Puts forward an effective and feasible method to measure the crest factor of high-frequency electrosurgical generator.