研究了实际系统中有源声吸收自适应控制方案。
An adaptive control approach applied to practical active sound absorption systems is presented.
文中同时讨论了一种射线的方法，用于解决给定了海面、海底反射系数、介质声吸收系数的海洋环境下的问题。
Also, we discuss a ray treatment method which is used for the model given surface and bottom power reflection coefficients and volume absorption.
结论静脉快速输入HL - 1可使兔肝脏组织结构发生相应的变化，使肝脏声吸收衰减增加，因而改变了肝脏组织声学环境。
Conclusion Liver tissues and structures varied by HL-1 quick intravenous infusion. The promotion in ultrasound attenuation and absorption indicated a shift of acoustic environment.
恶劣天气中产生的气泡比平时更多，正是这些气泡吸收了鲸鱼发出的“滴答声“。
It is these that absorb whale "clicks": Rough weather generates more bubbles than usual.
在形式上，一秒钟，或者说一次“滴答声”被定义为在小心受控条件下，微波能量喷发或是铯133原子吸收的9 192 631 770个循环。
One second is formally defined as 9, 192, 631, 770 cycles, or "ticks and tocks," of microwave energy emitted or absorbed by cesium-133 atoms under carefully controlled conditions.
两边的包厢只可以吸收大约40%的声音(Beranek, 1979)，提供相当的反射声到观众区和表演区。
The sides of the boxes are only about 40% absorptive (Beranek, 1979) so they provide a substantial return of reflected sound back to the room and to the performers.
但常用的光声仪器的现场性、实时性较差，一般红外吸收法又不如前者灵敏。
However, photoacoustic techniques can hardly provide in-situ measurement and gas filter correlation techniques are of less sensitivity.
悬浮液的声衰减分为三种主要类型：吸收衰减、散射衰减和扩散衰减。
The acoustic attenuation of suspending liquid is divided three kinds as absorption attenuation and scattering attenuation and diffusion attenuation.
请注意，泡沫板出售声待遇往往是造型的外观，并更好地吸收声音到达角。
Note that foam panels sold as acoustic treatment are often sculpted for appearance, and to better absorb sound arriving at an angle .
本文报道了近年来我国在生物组织超声特性——传播速度、衰减、吸收、反射、散射和非线性声参量方面的研究进展情况。
We reported the main progress made in China in recent years of the study of ultrasonic tissue characterization-propagation velocity, attenuation, scattering and nonlinearity parameter, etc.
本文使用共振多程池的光声探测法对CO_2和SF_6分子的无多普勒饱和吸收光谱进行了实验研究。
The Doppler-free saturated spectroscopy of the CO2 and SF6 molecules is investigated experimentally by using optoacoustic detection with a resonant multipass cell.
回热器是热机系统的热声源，从外热源吸收热能补偿热机系统的能量耗散，维持系统的热声振荡。
The stack is thermoacoustic source of thermoacoustic engine. It absorbs heat energy from outside heat source to compensate for heat loss of the thermoacoustic engine and keep the engine oscillate.
实验结果表明：施加电场后的电流变液夹层圆柱壳体对处于中、高频率的声波没有明显的吸收和阻隔效果，但对于由声激励引起的结构振动有明显的控制作用。
The test results show that by adjusting applied electrical field strength, the properties of the ER material as well as the sandwich cylindrical shell can be changed.
分析显示，由于玻璃基质的多声子吸收，对激光能量的吸收而引起的热冲击是导致玻璃破坏的主要原因。
Analysis indicates that the main reason of the glass damage is thermal impact, which results from the absorbed laser energy for glass matrix and hydroxyl vibration.
硒化物玻璃具有低的材料色散、高的禁带宽度、长的多声子吸收边，是制备中远红外光纤的优秀材料。
Selenide glasses have low material dispersion, high-energy bandgap, long-wavelength multiphonon edge and it's the perfect candidate for mid-far-infrared fibers.
硒化物玻璃具有低的材料色散、高的禁带宽度、长的多声子吸收边，是制备中远红外光纤的优秀材料。
Selenide glasses have low material dispersion, high-energy bandgap, long-wavelength multiphonon edge and it's the perfect candidate for mid-far-infrared fibers.
应用推荐