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And it is further proved that the technique is effective and practical by means of the examples of the extraction of periodic and aperiodic signals.

运用周期和非周期弱信号的检测实例，进一步证明了该方法的有效性和实用性。

The periodic correlation function and aperiodic correlation function are discussed in this thesis.

本文讨论了序列的周期相关函数和非周期相关函数，归纳总结了部分周期相关函数的概念及性质，与此相对应给出了部分非周期相关函数的概念。

This thesis also studies hard aperiodic task scheduling under fixed priority environments and presents its own algorithm.

本文最后研究了基于固定优先级策略的硬非周期任务调度，并提出了自己的算法。

The improvement of the aperiodic array's beam pattern made by the spectral decomposition method is analyzed.

为配合新一代三维视觉声纳的开发，研究了谱分解波束形成方法。

ODPPE can create a larger server than other methods, and thus obtains better aperiodic response time performance.

ODPPE算法可获得较大的服务器，因此可获得较好的非周期任务响应性能。

Most of the sequences are aperiodic with recurrence intervals varying from a few minutes to hundreds of days.

大部分相似地震的活动表现为非周期性，重复间隔从数分钟到数百天不等。

In engineering and laboratory research, the dynamic long perioriodic and aperiodic waveform singals are often required.

在工程和实验研究中，时常要求动态地提供连续的长周期或非周期的复杂信号。

Other useful categories include those of periodic or aperiodic signals and random or deterministic signals.

其他有用的分类包括周期信号和非周期信号，随机信号和确定性信号。

Based on the idea of frequency domain subspace, a multipath delay estimating method for aperiodic spreading system is proposed.

摘 要：基于频域子空间思想，给出了一种适用于非周期扩频系统的多径时延估计方法。

By using the algebraic method, we obtain a new formula for the expected hitting time of random walks on strong-connected and aperiodic digrahs (irreducible and aperiodic Markov chain). From this formula, we obtain the explicit expressions for the expected hitting times of random walks on directed de Bruijn graph, directed Kautz graph and some graphs constructed from strong regular graph, etc.

利用代数方法给出了强连通非周期有向图上随机游动（即不可约非周期马尔可夫链）平均首达时间一个新的表达式，并利用这个表达式得到了有向de Bruijn图，有向Kautz图以及和强正则图相关的几类图上随机游动任意两点之间的平均首达时间。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。