Accurate measurement of multiphase flow can open out the mechanism of multiphase flow , set up model of multiphase flow , and also provide essential bases for forecast , design and optimized control of flow process 多相流参数的准确测量，可揭示多相流动的机理，建立多相流动模型，并对流动过程预测、设计和优化控制提供必要的依据。
Methods : the blood flow parameters of 113 patients with vertebral artery course variation among 1161 patients with cervical spondylopathy were statistically analyzed and compared to the control group 方法：用彩色多普勒对颈椎病患者进行检测，从1161例颈椎病中筛选出113例椎动脉走行变异患者，对变异侧内径和血流参数与对照组进行统计学比较。
The two - phase flow is a complex nonlinear dynamic system . it is difficult to measure parameters of two - phase flow because there are interaction at the interface and slip between the two phases 两相流系统是一个复杂的非线性动态系统，相间存在着界面效应和相对速度，致使两相流参数检测的难度较大，在国际上，也是一个亟待发展的探索研究领域。
The paper introduces a measurement method of two - phase flow parameters based on digital image processing techniques through processing image of an experiment study of the transient drag property on the high - temperature particles falling into the cold liquid pool 文章以处理高温颗粒沉降冷池实验图像为例，介绍基于数字图像识别技术的气液两相流参数检测方法。
Process tomography ( pt ) technique can provide interior behavior 2 / 3 dimension visualizing information in process equipment such as closed pipe , vessels and so on in real time , so it is a novel approach for two - phase flow parameters measurement 过程层析成像( pt )技术能实时提供封闭管道、容器等过程设备内物场运动状态的二三维可视化信息，为解决两相流参数检测问题提供了一条新途径。
Process tomography ( pt ) technique can provide interior behavior 2 / 3 dimension visualizing information in process equipment such as closed pipe , vessels and so on in real time , so it is a novel approach for two - phase flow parameters measurement 过程层析成像( pt )技术能实时提供封闭管道、容器等过程设备内物场运动状态的二三维可视化信息，为解决两相流参数检测问题提供了一种新的途径。
Virtual - loop ' s function is similar with the inductive loop sensor . each lane can have one or two virtual - loops to detect its traffic parameters . this method avoids the complicated vehicle identification , extraction and tracking 虚拟线圈的作用类似于电磁感应线圈，每个车道可以设置一到两个虚拟线圈来检测交通流参数，该方法的特点是避开了在二维图像空间中进行复杂的车辆特征提取与跟踪。
The measurement of two - phase flow is difficult , owing to the complexity of the characteristic of two - phase flow . in many cases , the two - phase flow measurement technique has been one of the factors that bottleneck the study in the field of two - phase flow 两相流系统是一个复杂的非线性动态系统，两相流参数检测的难度较大，在很多情况下，两相流参数检测技术已成为两相流研究的一个制约性因素。
Electrical capacitance tomography ( ect ) is a kind of process tomography techniques that are widely studied . ect is fast , non - invasive , low cost , safe and widely applicable . it has become one of important techniques for two - phase flow parameter measurement 电容层析成像技术是过程层析成像技术的研究热点之一，具有非侵入性、适用范围广、成本低廉和安全性能佳等优点，已发展成为一门重要的两相流参数检测技术。
Methods two hundred and nine patients who suspected suffering mammoneoplasm were examind , and 218 solid lesions of the shape , boundary , echogenicity , calcification , enhancing or decreasing of post lesion and color doppler signals were observed before operation 方法对209例女性患者（ 218个肿瘤）术前进行灰阶超声、彩色多普勒超声检查，观察乳腺肿块形态、边缘、内部回声及钙化、后方回声以及血流信号分布、测定血流参数。
