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piezoelectric, mechanical, and thermal properties and their use in surface acoustic wave (SAW) devices operating specially at GHz frequencies. These materials have been appreciated for a long time due to their high acoustic velocities, which are important parameters for active microelectromechanical systems (MEMS) devices. For this object, ?rst-principles calculations of the anisotropy and the hydrostatic......
Effect of working pressure and temperature on ZnO film deposited on free-standing diamond substrates ZHAO Ping(赵 平)1, XIA Yi-ben(夏义本)1, WANG Lin-jun(王林军)1, LIU Jian-min(刘健敏)1, XU Run(徐 ... film; c-axis orientation; free-standing diamond film; surface acoustic wave device; radio-frequency magnetron sputtering 1 Introduction Diamond has the highest acoustic wave velocity among all......
in acoustic agglomeration[J]. Journal of Chemical Engineering of Chinese Universities, 2013, 27(2): 199-204. [22] LIPKENS B, SHAO Z D. The effects of frequency and sound pressure level on acoustic... by comparing the sound pressure distribution laws between clear water and the UTS. And then, the acoustic wave parameters were optimized by the control variable method. Furthermore, the variation......
-capillary pressure relation in sandy medium under water level fluctuation LI Yan(李雁)1, 2, ZHOU Jin-feng(周劲风)3, XU Jun(徐军)4, KAMON M5 1. School of Marine Sciences, Sun Yat-sen University, Guangzhou...-capillary pressure (S-p) relation in water-light nonaqueous phase liquid (LNAPL) two-phase sandy medium under water level fluctuation. Three-electrode electrical conductivity probe (ECP) was used......
monitoring of acoustic emission, pressure and displacement, the ground pressure activity and the stability status of surrounding rock masses and the two shafts were assessed. Based on in-situ monitoring practice in Haigou mine,4 modes to judge rock stability according to the monitoring information of acoustic emission,pressure,and displacement were presented.关键词:......
-borne noise was calculated by the acoustic boundary element method (ABEM), and the flow-induced structure noise was obtained by the coupled acoustic boundary element method (ABEM)/structure finite element method (SFEM). The results show that in pump mode, the pressure fluctuation in the volute is comparable to that in the outlet pipe, but in turbine mode, the pressure fluctuation in the impeller......
, experiments and numerical simulations were performed. The results show that the spatial distributions of acoustic emission (AE) events become very different as lateral pressure coefficients change...; blast disturbance; lateral pressure coefficient; acoustic emission; power-law fitting 1 Introduction Under high in-situ stress conditions, in the mining process, rock masses are inevitably subjected......
on granite specimens, each with a prefabricated circular hole, under different lateral loads. Using micro camera, acoustic emission (AE) system, and infrared thermal imager, the AE characteristics...; acoustic emission; spatio-temporal evolution; thermal imaging Cite this article as: LIU Chong-yan, ZHAO Guang-ming, XU Wen-song, MENG Xiang-rui, HUANG Shun-jie, ZHOU Jun, WANG Yun-kun. Experimental......
of the pencil-lead-break experiment recorded in Metal Pressure Vessel Acoustic Emission Testing and Result Evaluation (GB/T 18182-2000), the size of HB pencil lead is 0.5 mm, and the pencil lead is broken...Trans. Nonferrous Met. Soc. China 30(2020) 789-799 Acoustic emission source location considering refraction in layered media with cylindrical surface Zi-long ZHOU1, Jing ZHOU1, Xin CAI1, Yi-chao RUI1......
3 初始相位差对耦合后相位差及合成声压幅值的影响 Fig. 3 Impact of initial phase difference on coupling phase difference and synthetic acoustic pressure 2.2 热声振荡器距离对声耦合的影响 仍不改变谐振腔的尺寸结构,在谐振腔长度为4 cm,半径为4 cm 的条...耦合后相位差的影响最大.可见,在谐振腔尺寸结构不变时,改变热声振荡器间距对协同作用的影响很小. 图4 合成声压幅值随热声振荡器间距的变化关系 Fig. 4 Relationship between synthetic acoustic pressure level and distance of thermoacoustic oscillator 图5 耦合......