JTextPro: A Java-based Text Processing tool that includes sentence boundary detection (using maximum entropy classifier), word tokenization (following Penn conventions), part-of-speech tagging (using CRFTagger), and phrase chunking (using CRFChunker

ZOOM-FFT称为细化的快速傅立叶变换，又称为选带快速傅立叶变换。ZOOM-FFT的功能是对信号的频率进行局部细化放大，使感兴趣的频带获得较高的频率分辨率。实现FFT细化功能的算法有几种，如频移法-、相位补偿法和最大熵谱法等，目前应用最关的是频移法(ZOOM-FFT is called a thinned Fast Fourier Transform, also known as Fast Fourier Transform. The function of ZOOM-FFT is to pa