Methods; To study the relationship between signal attenuation and temperature or time by the theory of diffusion movements on classical physics.
方法：用经典物理学的扩散理论探讨扩散运动引起的信号衰减与温度、时间的关系。
Based upon wave theory and ignoring attenuation losses, the echo amplitude is.
按照波动理论，在忽略衰减损耗的情况下，回波振幅（ ）。
The theory and experiment verifies that it is a good pulsating attenuator and has large attenuation amplitude and wide attenuation band to pressure pulsation of oil source.
理论及试验证实它对油源压力脉动衰减幅度大，衰减频带宽，是一种性能良好的脉动衰减器。
Based on coupling theory, the relations between the attenuation and the changing parameters were analyzed and the wavelength minim-loss was discussed.
基于耦合波理论，分析了衰减量与改变参量之间的关系，讨论了波长微损耗特性。
A matrix treatment is presented by two different methods based on multi-mirror theory to calculate the transmission characteristics of the multi-cavities Fabry-Prot filters with attenuation.
利用多镜理论以两种不同方法推导了在多腔级联法布里珀罗滤波器件中引入衰减时信号透过率的传输矩阵算法。
In this paper, a theory and instrument for measuring three-phase saturations of oil, gas and water system in cores by microwave attenuation technique were discussed.
本文论述了微波衰减法测定圆柱状岩芯油、气、水三相饱和度的理论及其仪器构成。
This paper derives an energy attenuation formula of seismic waves in the wavelet-scale domain from the wavelet theory and seismic wave propagation equation in anelastic medium.
本文从小波理论出发，结合地震波在黏弹性介质中的传播方程，推导出小波尺度域地震波能量衰减公式。
By combining theory analysis with test measurement, the velocity attenuation regularity of projectile fragments was discussed.
采用理论分析和试验测试相结合的方法，对弹丸破片的速度衰减规律进行了研究。
Using theory of vibration wave propagation, the concept of the attenuation coefficient of vibrating acceleration is drawn, and the test results of attenuation coefficient are analyzed.
应用振动波传播理论引出加速度衰减系数的概念，并对加速度衰减系数的试验结果进行了分析。
The theory value of the imaging distances is about 12 attenuation lengths in ordinary water.
一般水质下成像距离理论值约12倍衰减长度。
Ct image of an object can be reconstructed according to the theory that attenuation of X-ray emerges when it passes through objects with different density.
根据射线穿过不同密度的物质产生的衰减不同，可以重建出物体的CT图像。
A model for thrust calculation was set up by combining Sedov's theory of self similarity solution for line explosion with shock wave theory of reflection and attenuation.
建立了基于谢多夫柱爆轰理论和冲击波反射与衰减理论的光船推力计算模型。
After built the material's defect model in theory, combined the attenuation image and damage mechanics of acoustic, we can get the material's invalidation model.
从理论上建立材料的缺陷模型，并结合声衰减分布图与超声损伤力学原理，就能获得材料的失效模型。
This thesis, author has summarized the theory of passes and attenuation equation of stress wave;
本文总结了应力波的理论和爆破地震波的传播和衰减规律；
The theory of noise attenuation by patterns is the same whether applied to the shot or the geophone end of the wave trajectory.
应用组合方法压制噪声的原理，不论对炮点还是对栓波器波的轨迹终端都是一样的。
A synchronous and disturbance attenuation system for the dual linear servo-motors is designed according to feedback decoupling theory.
运用反馈解耦理论，设计了一个双直线电机的同步抗干扰控制系统。
It is demonstrated by theory and data observed in different time at same location that the attenuation coefficient of PAR is independent of the intensity of radiation.
海上同一站位不同时间的观测数据计算的PAR衰减系数相差很小，表明PAR的衰减系数是海水的光学性质，与辐射强度无关。
It is demonstrated by theory and data observed in different time at same location that the attenuation coefficient of PAR is independent of the intensity of radiation.
海上同一站位不同时间的观测数据计算的PAR衰减系数相差很小，表明PAR的衰减系数是海水的光学性质，与辐射强度无关。
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