本文还考虑了界面状况对声散射的影响。
The effects of the boundary condition on sound scattering are also considered.
瞬态声散射信号包含有较丰富的目标信息。
Transient acoustic scattering contains rich information about objects.
给出了水中有限长弹性目标声散射问题的求解方法。
A method is presented for studying bistatic scattering of acoustic waves by finite elastic target.
本文主要是对浅海波导中目标声散射问题进行研究。
In this paper, the scattering of an object submerged in a shallow water waveguide is discussed.
声散射问题的研究一般建立在入射波为平面波的基础上。
Previous research on acoustic scattering was generally on the premise that the incident waves were plane waves.
针对水下任意形状刚硬体，建立了其声散射T矩阵法计算模型。
A computational model of T-matrix method to calculate the acoustic scattering from the submerged rigid objects with arbitrary shapes is established.
应用声散射原理描述了钛合金中方形轮廓线低倍组织对超声波探伤的影响。
Effect of "square line" structure of titanium alloys on ultrasonic testing is analysed by the principle of sound scattering.
本文对收发分置情况下，某潜艇模型的声散射特性进行了理论分析和实验研究。
Under the situation of separated source and receiver, theoretical analysis and experimental research on acoustic scattering properties of some submarine model are made in this paper.
本文综述了非均匀软组织声散射模型的研究概况及其在超声组织定征中的应用。
The paper made a review on the research's state of ultrasonic scattering model for inhomogeneous soft tissue and the appliance of which in ultrasonic tissue characterization.
本文重温了声散射和散射强度概念以及不同形状散射体的散射的理论分析结果。
The concepts of acoustic scattering and scattering strength of different acoustic reflectors are reviewed in this paper.
水下目标声散射特性研究是主动声纳赖以工作的基础，也是主动探测产生新思想、新原理、新方法的基础。
The study on the characteristics of scattering from an underwater target is only the base that the active sonar works on but also the source which new ideas, new theories and new methods come from.
本文从声辐射和声散射两个角度分析了蛙人的声学特性，并利用比较法测量肺部和模拟呼吸器的目标强度。
The paper analyses the diver's acoustic characteristics from radiating and scattering, and measures the target strengths of lung cavities and simulated air tanks with the comparative method.
另一部分则是由于声波在不均匀介质中的声散射把能量散射到其他方向，而使原来传播方向上的声波能量减弱。
The dispersion is due to the inhomogeneity of medium, which will lead the energy of sound to deviate from its direction of propagation.
为了建立浅海中的目标声散射模型，本文利用几何图形建模软件对潜艇等具有复杂几何外形的目标进行精确建模。
In order to model the acoustic target scattering in the shallow water, first, the target with any kind of shape, such as a submarine, is modeled by geometric drawing software.
利用逆散射理论，通过测量离体血管的声散射场振幅谱的大小周期，重构了猪的主动脉离体血管的内外半径，重构参数的相对误差<4%。
Inverse scattering theory was applied to reconstruct the inside and outside radii of the aortic blood vessels of a pig by scattering spectrum. The relative errors of reconstruction were less than 4%.
猪的出血性淋巴结组织的声散射系数比正常淋巴结组织的小，且随频率的变化而变化，背向散射技术是在高频段进行组织定征的有效手段。
The backscatter coefficient of hemorrhage lymphnode is smaller than that of normal lymphnode and changes with the frequency. The ultrasonic backscatter microscope technique is a useful device…
本文讨论一列平面波与一列平面行波脉冲的声相互作用，显然这两个波不仅都满足波动方程，而且可以用来讨论公共区之外的声散射声问题。
In this paper, the interaction between a cw plane wave and a plane pulse travelling with sound speed is considered. Both of them satisfy the homogeneous wave equation.
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.
发现某些声子散射谱中除三个正常峰外还存在一个异常峰。
An abnormal peak has been observed in the Brillouin spectra for some phonons in addition to the three normal peaks.
结果表明，电子有效质量失配对电子-声学波声子散射率的影响不可忽视。
It is shown that the effect of electron effective mass mismatch on the electron phonon scattering rate is notable.
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.
研究了含裂纹的弹性结构对声的散射作用。
The acoustical scattering by cracked elastic structures is studied.
对光纤通信系统中的受激布里渊散射(SBS)以及声子损耗对SBS的影响进行了研究。
The stimulated Brillouin scattering (SBS) and the effect of phonon loss in SBS in optical fiber communication systems are investigated.
其次，对热电材料的声子输运问题进行研究，观察到了强的界面散射和量子限制效应。
Secondly, phonon transport in thermoelectric materials will be discussed, where strong interface scattering and quantum confinement effect have been observed.
讨论了利用混合介质受激布里渊散射效应调谐激光频率和产生可调谐相干声辐射的可能性及意义。
The significance and possibility of the use of stimulated Brillouin scattering of a mixed liquid media in tuning laser frequency and generating tunable coherent ultrasonic radiation are discussed.
随着温度增高，电阻率的变化可用声子及局域自旋涨落的散射来解释。
The change of the resistivity with increasing temperature can be interpreted in terms of the phonon and the local spin fluctuation scattering.
本论文主要研究声子频率和掺杂点缺陷浓度对同位素掺杂硅声子散射的影响。
This paper focuses on the phonon frequency effect and the isotope-doped concentrates effect on the phonon scattering in isotope-doped Si.
模拟中包含的散射机理主要有声学声子散射、极性光学声子散射、电离杂质散射等。
In our simulation model, the scattering mechanisms include acoustic phonon scattering, polar optical phonon scattering, and ionized impurity scattering and so on.
由于辐射声子携带能量很少，需要多次散射过程使得电、声子趋于热平衡。
Because emitted phonons carry only little energy, multiple scattering processes is needed for electrons and phonons to reach thermal equilibrium.
声遥测水中悬浮粒子（如泥沙）的反向散射强度，可反演获得粒子浓度。
The concentration of suspended particles in water can be estimated by inversion of the backscatter intensity with the acoustic telemetering system.
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