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The quasi periodic regularly structure of tissue peaks in the power cepstrum of ultrasonic backscatter.

本文论述了软组织散射元准周期规则分布导致超声散射信号相干峰产生的机理，提出利用AR幅度倒谱估计散射元平均间距及其变化，结合组织外加应力来估计软组织内局部杨氏弹性模量。

Besides the orbit of its quotient space is periodic, which indicates when we study the dynamics property on the side of quotient spaces we may. have some facile results.

指出在商分形模型中，商空间上的轨道是具有周期性的，这说明从商空间的角度研究迭代函数系统的动力性质，可能会出现一些易得的结果。

The boundary radii of atoms and ions of elements from first- to fifth-row in the periodic table are obtained.

所得原子边界半径具有明显的周期性，并与传统的原子半径具有很好的关联。

The results verify that the three kinds of strategy are effective to periodic signal, diesel engine vibration signal and random signal.

研究结果表明，这三种控制策略对周期信号、柴油机振动信号和随机信号均有较好的控制效果。

The results are useful to the study of the randomness of periodic sequences and the analysis and design of stream cipher.

这些结果对进一步研究周期序列的随机性以及流密码的分析和设计都是有用的。

A response reanalysis approach of structure under harmonic or periodic excitation has been studied with original vibrating response.

再分析方法已应用到诸多领域，如结构静响应的再分析，结构振动模态的再分析，这些方面的研究已取得很大进展。

However strong your plan and however sure you are of your goals, make room for periodic reassessment.

不论你的计划多么强，也不论你对自己的目标有多肯定，都要为重新考虑预留余地。

It is suggested that the nature of Talbot serf-imaging is the recordation and reappearance for periodic space information of object by photons.

与此同时，提出了塔尔博特效应实际上是光子对周期性空间信息的记忆与再现的过程，从而对光子在光传播过程中携带空间信息产生了一定认识。

The periodic US-Japan trade talks only result in more recrimination.

美日之间定期的贸易谈判所导致的结果只是更多的相互指责。

The conditions with periodic solution are discussed in detail relating to fractional linear recursive relation of first order and some useful conclusions are obtained.

对一阶分式线性递归关系具有周期解的条件进行了详细讨论，得到若干有用的结论；对二、三阶分式线性递归关系，分别列举了一个具有周期解的例子，并对解的周期性进行了验证。

This paper discusses design and realizable methods of remote test output interface from logical design angle.

本文从逻辑设计的角度讨论遥测输出接口的设计及实现方法。

This also 星体投射plies to buildings, structures and geological features.

这也适用于建筑物和地质特征。