| 1. | Sedimentation velocity method
沉降速度法 |
| 2. | Dynamic measurement technology of foundation pile with reflect wave method and frequency - initial velocity method and its application
初速度法基桩动测技术及其应用 |
| 3. | The relative difference between values of dry density measured by wave velocity method and pir replacement method is in the range of 1 %
根据相关方程由实测波速推测压实干密度值，相对试坑置换法的实测值，误差在1 %范围内。 |
| 4. | The study provides basic detection theory and practicel engineering experiences for popalarizing surface wave velocity method to detect dry density of compacted rock - fill layer in practice
本项试验为推广应用稳态面波法检测干密度值提供了理论依据和工程实践经验。 |
| 5. | For example , the quenching and quenching plus low tempered structure of 38crmoal are hard to be differentiated by velocity method and the principal frequency technique . it will be better if they are differentiated by the method of relative attenuation coefficient
38crmoal钢的淬火与淬火+低温回火组织，用声速法和主频率比较法都难以区分，最好的方法是比较功率谱谱峰特征(幅度、数量、分布) 。 |
| 6. | 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。 |
