subsequently, a time reversal technique based ultra-wideband impulse siso/miso communication scheme is proposed in this dissertation and employed to improve the signal-noise-ratio of the receiver.

随后，一种基于时间反演技术的超宽带脉沖siso/miso通信方案在本文提出并用于提高接收端信噪比。

the iterative time reversal processing and the decomposition time reversal operator method are studied.

研究了迭代时反处理和时反算子分解方法。

the capability of time reversal processing for echo-to-reverberation enhancement is studied using computer simulation under the condition that target is in the middle of the shallow water guide.

针对典型的浅海波导环境，通过计算机仿真研究了目标位于波导中间深度条件下时间反转处理增强信混比的能力以及目标深度的变化对信混比增强能力的影响。

time reversal t is not unitary.

时间反演t不是幺正的。

as a technique to focus signals both temporally and spatially, time reversal (tr) was first applied in acoustics, and in recent years it was introduced into wireless communication field.

时间反演（tr）作为一种在复杂媒质中实现时间和空间聚焦的技术，最初应用于声学，近年来被引入电磁波领域。

also it introduces the background knowledge of time reversal application. that is the basic knowledge of underwater acoustic channel, such as the kraken normal mode.

同时介绍了文中时反处理法的应用背景知识，即水声信道的基本知识，着重介绍了基于简正波的kraken水声信道模型。

it presents a new approach to array imaging that is motivated by time reversal in random media(using) active transducers array in random media.

提出在随机媒质中采用时间反转镜对主动换能器阵列超声成像的一种新算法。

this is the first part of our work on time reversal symmetry applied to non-equilibrium statistical stationary states from a unified microscopic quantum statistical point of view.

本文是作者从微观量子统计理论出发应用微观可逆性原理讨论非平衡统计定常态普遍性质的第一部份。

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.

推转项的引入破坏了时间反演对称性，单粒子角动量在内稟对称轴上的投影量子数已不再是好量子数。

time reversal processing (trp) is a signal processing method based on the focusing property. it attached more attention in underwater acoustic communication, active detection and so on.

时间反转处理（trp）是利用这种聚焦特性的信号处理方法，它在水声通信、主动声纳检测这类脉沖—回波型领域的应用研究越来越受到重视。

the lake test verifies that the active or passive time reversal mirror technology can also be used in active sonar and improves signal to reverberation ratio.

湖试表明，采用物理时间反转镜和被动时间反转镜方法，均可提高在混响限制条件下的检测能力，提高目标信混比。

time reversal is a unique self-focusing technique for spatial and temporal focusing of sound in unknown environments.

时反法是一种新颖的自适应聚焦技术，它可以使声信号在未知环境下实现时空聚焦。

based on the focalization ability to the wave origin of time reversal theory, the wave propagation image is rebuilt to display the damage.

利用时间反转法对波源的自适应聚焦能力，重建信号传播波动图，通过信号聚焦显示损伤位置和区域。

to solve the low stn problem in the real structure's shm, especially in composite shm, an amplifying signal and imaging damage method based on the time reversal theory is purposed.

针对真实工程结构，尤其是针对复合材料板结构健康监测时存在的信号信噪比低下问题，提出了基于时间反转聚焦原理的信号增强与损伤成像方法。

combined the waveguide invariant and the time reversal reverberation hulling, a time reversal bottom reverberation null-broadening method is proposed.

本文结合波导不变性和时反海底混响零点设置方法，提出了一种利用波导不变性实现时反混响零点展宽的方法。

time reversal invariance is a very useful symmetry in subatomic physics.

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。

based on the focalization ability of time reversal theory to the wave origin , the wave propagation was rebuilt by an image method which displays the damage as the focusing point .

利用时间反转法对波源的自适应聚焦能力，重建信号传播波动图，通过信号聚焦显示损伤位置和区域。

the finite element method is used to investigate the effect of a time reversal method on the guided wave inspection in pipes.

为克服现有导波检测技术对管道小缺陷检测的不足，给出了一种基于时间反转理论的管道缺陷超声导波无损检测方法。

this article mainly discusses how to realize active detection of underwater targets using time reversal technique.

本文重点讨论了如何利用时反处理法的聚焦特性实现对水下目标进行主动探测和定位。

the relation between spatiotemporal inverse filter and time reversal is analyzed, and the iterative time reversal is presented.

在分析空—时逆滤波和时反处理关系的基础上，提出了一种迭代时反的方法。

by designing trp system, we built a real-time experimental system, and validated the feasibility of a physical time reversal system.

通过设计时间反转处理实验，构建实时处理的实验系统，进一步验证了时间反转处理物理实现的可行性。

we have shown nonexistence of symmetry with respect to time reversal of the time correlation function of the steady state.

证明了定态时间相关函数不存在时间反演对称性。

this dissertation investigates high-resolution radar imaging methods and self-adaptive ultra-wideband wireless transmission schemes based on the electromagnetic time reversal technique.

本文研究了基于电磁时间反演技术的高分辨率雷达成像方法和自适应超宽带无线传输方案。

the principle of time reversal and the process of active detection using this technology were analyzed.

分析了时反法的原理，并进一步分析了时反法用于主动探测的过程。

when time reversal is used to detect and localize the underwater object, dissipation in the medium degrades the quality.

由于传播介质损耗的存在，在复杂的浅海波导中应用时间反转处理对目标进行检测和定位效果不佳。