设计了一种新的软硬件相结合的方法去检测反电动势过零点。
Firstly, a new zero-crossing detection method with software comparing with hardware is designed.
介绍了反电动势过零位置检测的原理及实现方法，并采用了数字式转速、电流双闭环控制。
One kind of sensorless control system for brushless DC motor based on DSP was introduced and the principle of back-EMF zero-crossing detection and realization method was discussed in detail.
本文讨论一种基于音频信号的广告条目检索和定位的一种自适应方法，它利用短时平均过零率和互相关函数从实时音频数据流中快速检测和定位广告条目。
In this paper we discuss a method for audio-based retrieval and location for AD, which USES short time average zero-passed rate and relativity-function to retrieve and locate AD from real-time audio.
本文讨论一种基于音频信号的广告条目检索和定位的一种自适应方法，它利用短时平均过零率和互相关函数从实时音频数据流中快速检测和定位广告条目。
In this paper we discuss a method for audio-based retrieval and location for AD, which USES short time average zero-passed rate and relativity-function to retrieve and locate AD from real-time audio.
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