Presented in this paper is the relationship between intake pressure wave actions and the general volumetric efficiency speed characteristics of multi cylinder engines.
本文论述的是根据台架试验及模拟计算结果得出的多缸发动机进气系统内压力波动与充气效率-转速特性的关系。
By the test about the volumetric dilatancy in rocks under the uniaxial compression with ultrasonic, the propagation of ultrasonic S-wave was analyzed in the compressing process of different rocks.
通过超声波对单轴压缩试验中岩石扩容现象的测试，分析了超声横波在不同岩石压缩过程中的传播情况。
And, using the planar hologram diffraction theory, the coupled wave equations of the volumetric hologram grating diffraction have been derived and the diffraction efficiencies obtained.
将体全息光栅视为许多平面全息光栅的集合，利用平面全息衍射理论导出体全息光栅衍射的耦合波方程，并得到其衍射效。
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