时间反演t不是幺正的。
时间反演t不是幺正的。
证明了定态时间相关函数不存在时间反演对称性。
We have shown nonexistence of symmetry with respect to time reversal of the time correlation function of the steady state.
如果时间反演，这些碎片就能以很多方式结合起来。
If time moved backward, the broken pieces could come together in a great many ways.
时间反演不变性在亚原子物理中仍然是一种很有用的对称性。
Time reversal invariance is a very useful symmetry in subatomic physics.
去年，耶鲁大学的一群物理学家想出了一个叫作时间反演激光器的东西，来实现这个逆过程。
Last year, a group of physicists at Yale University proposed a way to do just that with something called a time-reversed laser.
我还被我作过的一项简单的宇宙模型的研究所误导，在此模型中坍缩相似乎是膨胀相的时间反演。
I was also misled by work I had done on a simple model of the universe in which the collapsing phase looked like the time reverse of the expanding phase.
推转项的引入破坏了时间反演对称性，单粒子角动量在内禀对称轴上的投影量子数已不再是好量子数。
The cranking term breaks the time reversal symmetry, and the projection of the single particle angular momentum on the intrinsic symmetric axis is no longer a good quantum number.
为了解决非均匀介质中的光传输问题，利用光学相位共轭波的时间反演特性，实现了对克斯林衍射积分公式的改进。
In order to study laser propagation in inhomogeneous medium, Collins formula was improved by using time inversion characteristic of optic phase conjugation wave.
基于对智能层合板结构的模态分析，提出由结构的压电模态响应反演瞬态荷载时间历程的有限元方法。
Based on modal analysis to piezoelectric smart laminated plates, a finite inverse algorithm of the time history about impact loads by piezoelectric modal respondence is presented.
基于对智能层合板结构的模态分析，提出由结构的压电模态响应反演瞬态荷载时间历程的有限元方法。
Based on modal analysis of piezoelectric smart laminated plates, an FEM based inverse algorithm of the time history of impact loads by piezoelectric modal respondence is presented.
利用多极子阵列声波测井资料提取直达斯通利波、计算斯通利波中心频率偏移和时间延迟来进行地层渗透率反演的方法已被研究了多年。
In this paper, developed are a method and correspondent software for calculating formation permeability from the center frequency shift and travel time delay in direct Stoneley wave.
提供了离散时间广义非线性控制系统的不可测扰动的一种‘反演算法’。
The paper presents a linear algebraic solution of the dynamic disturbance decoupling problem for a generalized discrete time nonlinear system.
反演得到单向强化复合材料的有效松弛模量在时间域中的表达式，并且与其它结果进行了比较。
The inversion to the time domain of the effective relaxation modulus of this kind of composites is carried out. Finally, comparisons with other results are presented.
利用时间窗数据和频率窗数据所进行的联合时-频反演，缩小了拟合差，提高了定量解释精度。
The fitting difference is reduced and the precise of quantitative interpretation is improved by means of joint TF inversion with time and frequency window data.
基于对智能层合板结构的模态分析，提出由结构的压电模态响应反演瞬态荷载时间历程的有限元方法。
Based on the modal analysis of piezoelectric laminated plates, a FEM based inverse algorithm is presented for the time history of impact loads by piezoelectric modal response.
基于对智能层合板结构的模态分析，提出由结构的压电模态响应反演瞬态荷载时间历程的有限元方法。
Based on modal analysis of piezoelectric smart laminated plates a finite element inverse algorithm for identifying the time history of impact loads from piezoelectric modal responses is presented.
最后应用拉普拉斯数值反演技术得到时间域的解。
Finally, by applying Laplace numerical inversion technique the solutions in time domain can be obtained.
探讨了热传导方程在非局部时间边界条件下非线性热源反演的唯一性问题。
This paper deals with uniqueness of inversion of the nonlinear source term in heat equation with a class of nonlocal boundary of time.
回顾了实验室中超声波测量Q值的四种常用方法：上升时间法、回声法、频谱振比法和波形反演法。
The four common ultrasonic methods for measuring Q value in the laboratory, rise time, pulse echo, spectral ration and waveform inversion techniques are reviewed.
试验结果表明，采用水平基准面两步法静校正，时间剖面反演深度误差最小；
The results were as follows. The horizontal datum and two-pass statics method gave minimum depth error on time section.
采用覆盖空间尺度和时间尺度的实测资料进行反演分析，其参数结果能更全面的反映坝体材料特性。
The parameters results can reflect the material qualities full well, by adopting monitoring data at different Spaces and time.
应用测井约束反演资料，可对湖泛面及高分辨率时间地层单元进行高精度的追踪对比。
The correlation of flooding surfaces and high resolution chronostratigraphic units can be made using well logging constrained seismic inversion data.
建立了一种数值算法，从光波在湍流大气中传播的闪烁时间频谱的高频特征反演大气光学湍流谱。
A numerical algorithm is set up for the retrieval of optical turbulence spectrum from high-frequency temporal spectra of a light wave propagating through a turbulent atmosphere.
多通道高时间分辨率脑磁探测系统为反演脑内动态电活动参数提供了一种可能性。
Multichannel MEG detecting system with high temporal resolution provides a possibility to determine the dynamical parameters of electrical activities in a human brain.
常用的时间域反演方法不能直接用于深度域的井间地震资料。
The conventional inversion for time domain is unfavorable to cross-hole seismic data in depth domain.
先基于绝对时间坐标系下的软土次压缩计算修正式子，提出耦合软土流变项的新型指数曲线模型，并采用数学中最优化技术，根据前期沉降实测资料对模型中参数进行反演。
A new type of exponential curve model, coupled with rheological term for soft soils, is put forward based on the calculation formula of modified secondary compression under absolute time coordinates.
对P P波、PSV波的传播时间进行三项泰勒展开时，它们的系数中包含了地震波的各向异性信息及垂直速度信息，可以为地震波的弹性参数反演提供基础。
The three term Taylor series of P-P wave or P-SV wave reflection travel times in VTI media are the function of elastic parameters. Therefore they can be used to inverse the seismic elastic parameters.
对P P波、PSV波的传播时间进行三项泰勒展开时，它们的系数中包含了地震波的各向异性信息及垂直速度信息，可以为地震波的弹性参数反演提供基础。
The three term Taylor series of P-P wave or P-SV wave reflection travel times in VTI media are the function of elastic parameters. Therefore they can be used to inverse the seismic elastic parameters.
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