高频声波 meaning in English
high frequency sound wave
Examples
- The biggest immediate effect was the blackout of high - frequency voice - radio communications for planes flying far northern routes
太阳磁暴最严重的直接影响是北部航线飞机的高频声波通讯系统会发生中断。 - In traditional ultrasound , a doctor or technician places a handheld deice on the skin that sends high - frequency sound waes into the body
在传统超声中，医生或技术人员把手持式器件置于皮肤表面，它可以向体内发射高频声波。 - Ultrasound uses high - frequency sound waves to determine if a suspicious lump is solid or fluid . these sound waves are transmitted into the body and converted into a computerized image
超声技术应用高频声波检测可疑肿块是固体还是液体。这些声波被传导入体内并翻转回来计算机处理的影像。 - In this paper , high - order accurate weighted essentially non - oscillatory ( weno ) schemes are investigated and their applications in hyperbolic conservation laws are discussed . based on this , a new weno difference scheme which based on dispersion - relation - preserving relation is developed , and representative test cases with this scheme for computational aeroacoustics ( caa ) problems has been implemented and compared in order to test capability of wave capturing ; in addition , weno schemes generally do not converge at high order in the presence of contact discontinuity of euler equations , so a conservative front tracking technique coupling weno schemes and level set method to simulate the translating density profile is presented here , and numerical simulation with this technique for representative test case has been implemented and results show the desired accuracy
本文研究了高阶精度加权基本无振荡( weno )格式及其在双曲守恒律方程中的应用，在此基础上作了两个方面的工作：一是针对高频声波问题构造出一种基于保色散关系( drp )的weno有限差分格式，并对计算气动声学( caa )问题的代表性算例进行了大量数值实验，比较了该格式捕捉波数的能力；另外，针对高阶weno格式在处理euler方程的接触间断时精度有所降低的问题，研究了利用界面追踪技术levelset方法和高阶激波捕捉weno格式相结合的一种守恒追踪方法，并且给出有代表性的密度滑移面问题的算例，得到一致高阶精度的数值模拟结果。