负压力波 meaning in English
negative pressure wave
npw
Examples
- Combining with the time difference value of the pressure wave getting to both ends of the pipeline , adopts the genetic arithmetic to search the leak site of the pipeline
结合管道两端接收到负压力波的时间差，采用遗传算法搜索管道内的泄漏点。 - The paper introduced testing principle of infrared image in course of metallurgy heat engineering testing , based on several applied examples , analyzed application properties and range of infrared image technique and thermal image analysis in heat engineering analysis
介绍有关燃气管线泄漏检测和定位的一些方法,它包括实时模型与监控和数据采集法、改进的流量平衡法、负压力波法、相关分析法 - The paper makes use of multi - scale wavelet transform to detect the arriving time of the pressure wave to the both ends of the pipeline . the method could detect the break point of the signal , and could decrease the error bringing by the existing of impulse yawp
使用多尺度小波变换捕捉管道两端负压力波的到达时刻，有效地检测出了信号的突变，并能够较好地克服由于噪声存在而给定位带来的误差。 - Analysis is done on the change rules of liquid " s temperature along with the pipeline " s distance . the paper points out the defects of the const pressure wave velocity method and do some improvements on it : rebuilding the expressions of the pressure wave velocity in accordance with the simpson ' s rule
分析了管道内的流体温度随传输距离而变化的规律，并指出了此规律对管道负内压力波传播速度的影响。指出了常负压力波波速定位方法的局限性，并采用改进的负压力波定位技术，将管道内的负压力波速公式采用复化辛普森公式进行了改造。