对原有修正PRI变换进行改进，将分散在真实PRI箱附近几个箱中的到达时间差值累加起来，提高检测性能-PRI transform the original amendment to improve, will be scattered around a few boxes in the real PRI box add up to the arrival time difference and improve the detection performance

超声波流量计过零检测程序。通过找超声波信号的峰值和波形个数来确定到达时间。-It s a ultrasonic flowmeter zero-crossing detection program.To Find the peak of the ultrasonic signal and waveform numbers to determine the arrival time.

到达过程是的泊松过程，有循环检测，周期性检测，结合PCA的尺度不变特征变换(SIFT)算法，时间序列数据分析中的梅林变换工具，本程序的性能已经达到较高水平，可以实现模式识别领域的数据的分类及回归。- Arrival process is a Poisson process, There are cycle detection, periodic testing, Combined with PCA scale invariant feature transform (SIFT) algorith