最近的技术蓬勃发展，以下通过在强磁场，从而影响PET图像分辨率和衰减校正领域的改变正电子的运动技术障碍。
The technology recently blossomed following passing a technical hurdle of altered positron movement in strong magnetic field thus affecting the resolution of PET images and attenuation correction.
目的：比较非理想均匀磁场和线性梯度磁场中扩散运动引起的信号衰减对温度、时间的依赖性。
Objective; To compare the dependence of signal attenuation on temperature and time caused by the diffusion movements in inhomogeneous and linear gradient magnetic field.
海滨地区广泛存在涡动沙纹，它很大程度上决定着波浪衰减和泥沙运动。
Vortex ripples widely exist in coastal area and greatly control the attenuation of wave and movement of sediment.
对深V型滑行艇模型进行了静水横摇衰减实验和零速正横浪规则波中横摇运动实验，讨论了在处理试验数据时所面临的一些问题；
The roll decay test in still water and roll tests in regular waves at zero speed on model of a deep-Vee planing craft are conducted, and problems arising from the data processing are discussed.
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。
Methods; To study the relationship between signal attenuation and temperature or time by the theory of diffusion movements on classical physics.
考虑到时间离散的影响因素，建议将CMAP波幅衰减大于相应神经节段95%正常上限值诊断为肯定的部分性运动神经传导阻滞。
For differentiating conduction block from temporal dispersion, the 95% normal upper limits of CMAP decay over different nerve segments is recommended for a definite partial conduction block.
本文讨论了运动介质的水声混响过程，在补偿了能量衰减之后，它仍是一非平稳随机过程。
In this paper, we discussed the underwater sound reverberation of moving medium, which is a non-stationary stochastic process even after compensating its energy attenuation.
文中对地面运动衰减规律中的距离参数提出了一种新的定义，即从场地到破裂线两端点的平均距离。这个定义能较好地反映发生构造地震的断层破裂模式。
A new definition of distance parameter in attenuation law of ground motion, i. e. the average distance from site to both ends of rupture line is proposed.
理论研究和实验表明，多孔隙介质中流体的存在及其运动是弹性波频散和衰减的主要原因。
It is showed by theoretical study and tests that existing fluid in porous medium and its movements are main reasons of dispersion and attenuation of elastic waves.
此时隧穿表现出振幅衰减的准周期运动，同时会出现所谓的ESD现象。
We show that the tunneling exhibits the property of quasiperiodic with damping amplitude, at the same time the so-called ESD appears.
本文通过分析论证，揭示了运动波数值解法的关键技术——人工衰减措施。
Here we reveal theoretically the key point to use numerical solution of kinematic wave-artificial attenuation process.
在穿透层内有一指数衰减的屏蔽电荷分布，其符号与超导体表面由运动感生的电荷相反、数量相等。
There will be shielding charges in the penetration layer with a exponential distribution. The shielding charge has opposite sign and equal amount to the surface induced charge caused by moving.
其中，运动外磁场下块材悬浮力衰减的作用机理被归结为能量损耗带来的热量导致块材的性能参数下降。
This decay mechanism of the levitation force was attributed to the declined performance parameter of the bulk which was caused by the heat resulting from the energy loss.
余洛的研究小组认为，假如此区块是一种与主要地核运动相抗衡的“漩涡”区，那么此区块的增长便可以解释现今磁偶极场的衰减现象了。
Hulot's team argues that the growth of these reversed patches, presumably eddies that are working against the primary motion of the core, can explain the current decline in the dipole field.
余洛的研究小组认为，假如此区块是一种与主要地核运动相抗衡的“漩涡”区，那么此区块的增长便可以解释现今磁偶极场的衰减现象了。
Hulot's team argues that the growth of these reversed patches, presumably eddies that are working against the primary motion of the core, can explain the current decline in the dipole field.
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