准周期性

费波那奇（Fibonacci）超晶格是一种具有准周期性结构的超晶格，Bloch定理对此结构不适用。

The Fibonacci superlattice is a type of the superlattices with quasiperiodic potential field . In the quasiperiodic structure the Bloch theorem has become invalid .

低纬环流表明，副热带长波的异常发展也是造成1978年副高特强和酷暑的另一个原因。分析还发现，副高活动及持续高温有一个月左右的准周期性变化。

The anomalous development of the subtropical long'wave systems was also responsible for the sweltering summer in 1978 . Analysis indicates that there existed a quasiperiodic change for about one month in the subtropical high and sustained high temperature .

实验表明，在连续CO2激光辐照下，Ge平行板透射光强度随时间呈准周期性的变化。

Experiments show that transmittance of parallel-plane Ge changes quasi-periodically with time under CW CO2 laser radiation .

计算了准周期性边界条件下ZMS模型的无穷多运动积分；

An infinite number of integrals of motion are calculated in ZMS model with quasi-periodic condition .

在CELP编码器中，通常用延迟为抽样间隔整数倍的长项预测器表征浊音语音的准周期性。

The CELP Coder usually uses a long-term predictor that the delay is the integer multiples of sampling interval to exploit the quasi-periodic structure of speech .

通过对COADS海洋气象资料的分析，得出南海表层水温（SST）年际变化的若干大尺度特征.结果表明：南海SST年际具有一定的准周期性，其显著周期为24～30个月；

The marine meteorological data in the South China Sea ( SCS ) which were derived from COADS are analyzed . The results indicate that interannual variability of sea surface temperature ( SST ) in the SCS holds a quasiperiodical feature .

采用多窗谱分析、小波分析和Yamamoto突变检测分析等方法综合研究了重建的高原春季最高气温序列的准周期性及多尺度突变特征。

By using the Multi-Taper Method of Spectrum Analysis ( MTM ), method of wavelet transform analysis , and the Yamamoto method , the quasi-periodicities and multiple time-scale features of the T m were studied .

太阳活动千年尺度的准周期性波动

Quasi-periodic fluctuations of solar activity in scale of thousand years

暴雨泥石流暴发的准周期性探讨

Study on quasi-period of breaking out debris flow under storm

石油工程准周期性振动信号的新处理方法

A New Method of Quasi-Periodic Signal Processing in Petroleum Engineering

长江下游谷物天气产量变化与大型环流准周期性振动的分析

The quasi-periodic fluctuation of large-scale circulation and grain yield in the lower Yangtze

厦门能见度的准周期性变化

Change the analysis of meteorological visibility of Xiamen Airport

强余震的准周期性

Pseudo - periodicity of strong aftershocks

这些电子的电导图谱随势垒（耦合区域）的长度和势垒的高度变化呈现出周期或准周期性。

Conductance of the electrons as a function of potential height and barrier length exhibits a periodic and quasi-periodic pattern .

报导了周期性调制和准周期性调制的非晶态半导体多层膜的剖面透射电了显微像和其对应的电子衍射花样的性质。

The cross-section TEM photomicrographs and electron diffraction patterns arc presented for periodic and quasi-periodic modulated amorphous semiconductor multilayer films .

在真实轴流压气机中，上游静子叶排尾迹经由静止／旋转两套坐标系转换，对下游转子叶排流场进口气流产生准周期性扰动。

Upstream stator wake disturbs the downstream rotor flow periodically at the inlet through the transformation between the immobile / rotating coordinate systems in compressors .

根据基音周期平滑变化的特点，基于语音信号的准周期性进行了语音信号的基音提取。

Based on the feature of smoothly varying pitch period and the quasi-periodic structure of voiced speech , an algorithm for pitch prediction is presented .

本文根据语音的准周期性，提出了基于自相关函数最大值的语音活性检测算法。

In this thesis , we bring forth a new voice activity detection method on the maximum of autocorrelated functions based on speech 's cycle .

在含有耦合的乘性色噪声和加性白噪声的周期性和准周期性系统中，我们分析了噪声诱导的布朗粒子的输运现象。

The phenomenon of noise-induced transport of Brownian particles in periodic and quasi-periodic systems with coupling between multiplicative colored noise and additive white noises is investigated .

根据准周期性的韵母相邻周期具有很强相关性的特点，本文提出一种分别对声母和韵母采取不同维数的矢量量化的方法。

This paper presents a new VQ method with different dimensions to vowels and consonants based on the quasi-periodicity of neighbour vowels which leads to strong correlations .

在双核系统中引入宇称和自旋的退相干描述能量自关联函数中准周期性的衰减结构；

The quasi periodic structure in the energy autocorrelation functions is described by means of the concept of parity and spin decoherence in the intermediate dinuclear system .

构建了洪涝灾情指数，并运用联环替代法对各灾情因素的影响进行了分析.分析得出：洞庭湖区洪涝灾度具有阶段性和准周期性等特征；

It establishes the synthetic disaster index model and analyzes the influence degree of different disaster factors on synthetic disaster condition by use of the method of continuous substitution .

首先我们分别给出了存在（或者不存在）磁场时，由于在位能分布的准周期性对透射谱的影响，以及相应的能谱结构。

First , we give the evolution of transmission spectrum by changing the site energy distribution where the homogeneous flux is on or not , and the corresponding energy spectrum are given .

对中国历史气候记录的研究表明：准周期性是过去1000年间中国东部各区域的干湿气候变化的基本特征；

Based on the historical climate records of China , the study reveals that quasi periodicity is the basic feature of regional dry-wet climate happening in the eastern part over the past 1000 years ;

结果表明，该区6级以上强震活动具有准周期性，平均时间间隔约10年，且有间隔愈来愈小的趋势。

The result shows : the strong earthquake activity ( Ms ≥ 6 ) in this area has paraperiodicity ; The average time interval is about 10 years , and has a tendency of becoming shorter .

结果表明，这7条断裂带的强地震复发表现出趋于随机的、随机的、以及丛集的行为，复发过程不具有良好的准周期性，也不存在强度-时间或者时间-强度的相依性。

The result shows that recurrences of strong earthquakes of the 7 fault zones behave near-random , random and clustering characters . The recurrence processes never play a well quasi-periodic behavior , and exhibit neither strength-time nor time-strength dependence .

对于各种引力的准周期性变化对气候变化的影响，归纳出这样一条可能的途径：天体引力→地核环流变化→通过地幔热柱影响软流圈波动变化→通过地热影响气候变化；

The impact of gravitation on climatic change can be showed as follows : spherical gravitations-the change of core circulation influences fluctuation of soft flowing sphere by the " hot plume " of Mantle-the effects on climatic change of terrestrial heat ;

利用傅立叶描绘子对步态轮廓图像进行描述，用步态图像的高宽比进行步态的准周期性分析，并采用动态时间规正算法解决不同的步态周期的图像序列之间的比较问题。

Gait contour by using Fourier descriptors was described , to make quasi-periodic analysis on height and width ratio of gait image , and to solve the problems resulting from image sequence of different gait cycle by using dynamic time warping .

从所得的结果中看出：基本气流与扰动是相互制约的，基本气流的变化有准周期性，具有10&13天不等的周期，在各个循环中，基本气流增长及减弱的速率也很不一样。

The results obtained show that the basic current and disturbances constrain each other , that the basic current alters quasi-periodically with periods of 10 to 13 days , and that the rate of change of basic current in each cycle is quite different .

Rugate薄膜的周期（准周期）性结构具有多样化的特点，利用切趾和相移等膜系，能提高滤波器的角谱选择性。

Rugate coating has lots of diversified kinds of periodic and quasi-periodic structures . The angular spectrum selectivity can be improved by the apodized and phase-shifted coating .