In order to verify the acoustic character of the standing wave field between the noise source and the secondary source in ducts under the control of the active noise attenuation system, the authors made the single frequency noise cancellation experiment in low frequency bands on the adaptive active noise control experimental system designed by their own.
为验证在噪声有源控制系统作用下管道初级源与次级源之间驻波场的声场特性,在所设计的自适应有源消声实验系统上进行了低频段的单频消声实验,当各频率点分别取得了最大的消声效果后,采用驻波分离法对噪声有源控制系统作用下管道的声学特性进行了测试分析。
The studying results have proved that under the ideal noise cancellation condition the reflection coefficient module of standing wave field between the noise source and the secondary source is equal to 1, the reflection coefficient at the secondary source is equal to 1, the acoustic impedance at the position is equal to zero.
研究结果表明,当达到理想消声效果时,从次级源到管道下游声场的声压为0,在初级源与次级源之间形成一个声反射系数模等于1的驻波场,在次级源位置的声反射系数为-1,声阻抗为0。
The film structure determined temperature and standing wave field s characters which formed in laser irradiated optical thin film is presented, the temperature and standing wave fields is calculated for IR filter as an example.
介绍了由滤光片膜层结构决定的激光在光学薄膜中形成温度场及驻波场特性。
Acoustic performances of underwater acoustic structure are studied based on finite element me-thod,and results are determined directly by deriving the standing wave data formed by incident wave and reflected wave.
通过反射波与入射波形成的驻波场声压可以直接计算出水声构件的吸声系数。
Further,the standing wave distribution in the entire device was calculated using the Fresnel matrix method of optical thin film.
通过利用菲涅耳系数矩阵法计算,得到了光在垂直腔面发射激光器器件结构中形成的驻波场分布。
Acoustic performances of underwater acoustic structure are studied based on finite element me- thod,and results are determined directly by deriving the standing wave data formed by incident wave and reflected wave.
通过反射波与入射波形成的驻波场声压可以直接计算出水声构件的吸声系数。
Study on vibrating velocity in high-intensity standing wave field;
强驻波声场中脉动速度特性
Three-level atom in a standing electromagnetic wave;
驻波光场中的三能级原子
The system of an atom interacting with a standing electromagnetic wave is very complicated.
原子与光场相互作用系统是很难求解的 ,通过对二能级原子与驻波光场相互作用系统进行求解 ,在光场强度较弱的情况下 ,得出了二能级原子与驻波光场相互作用系统的波函数、能量的可能取值、二能级原子质心动量的可能取量。
Controllable Photon Band Gap with Standing Wave Drive in Cs Atomic System
铯原子中驻波场作用下可控光子带隙的研究
STUDY ON DEWATERING OF WASTE HEAVY OIL IN PETROLEUM REFINERY BY ULTRASOUND IN STANDING WAVE FIELD
驻波场中炼油厂重污油破乳脱水的研究
Diffraction Aberration of Focusing Atom Beam of Metastable Helium in Laser Standing Wave
亚稳态氦原子束在激光驻波场中聚焦的衍射像差研究
Dynamic Properties of Atoms in Standing Wave Laser and Teleportation of Quantum States;
激光驻波场中原子的动力学行为和量子态的隐形传送
Preliminary Investigation on Tunable Photonic Crystal in Hot Atom Gases;
气体热原子在驻波场中实现可调谐光子晶体的初步研究
Focusing characteristic of chromium atoms under elliptical standing wave
椭圆型激光驻波场作用下Cr原子的汇聚特性研究
stationary wave
【物】驻波, 定波
Analysis of the Influence Factors in Test of SVSWR for Chamber
影响电波暗室场地电压驻波比测试的因素分析
circular waveguide standing-wave detector
圆形波导管驻波检测器
standing wave linear resonance accelerator
驻波线性谐振加速器
Authorware Order of Standing Wave Taking Shape;
形成驻波的Authorware程序
field agent
现场代理人,驻地代理人
non-resident SIDFAs
非驻地高级现场顾问
Effective matching solutions for classical third-order standing and short-crested waves
经典三阶驻波、短峰波的有效匹配解
THE DYNAMIC OEMONSTRATION METHOD OF STANDING WAVE FORMED BY THE COHERENT WAVE SUPERPOSITION
相干波叠加形成驻波的动态演示方法
operating reflection coefficient
工作态反射系数 -电压驻波比
hot reflection coefficient
热态反射系数 -电压驻波比
Mission to Bosnia and Herzegovina
驻波斯尼亚和黑塞哥维那特派团