Based on the speech produce model , we find the reason of periodicity disappearance and the extremum number increase by analysing the character of speech signal when the glottal closes 于是从语音产生模型入手，详细的分析了声门闭合时刻语音信号的性质，找到了浊音信号经过小波变换后周期性消失、极值点个数增多的原因。
3 . for a given size cavity with a given size slot , the microwave power coupled into the cavity will reach the maximum value while the length of metal block is at a certain value under the condition of resonance ( 3 )固定腔体和孔缝尺寸,在共振条件满足的情况下,当方形金属块边长为一固定值时,耦合到腔体内的微波功率出现一个极值点。
The image is split into several blocks , and every block is processed individually . so we can get ride of solving large linear equations and calculating huge matrix , and the time and space complexity are lowered greatly 该方法按照图像极值点的分布将图像划分成若干块,分块处理,避免了求解大型线性方程组以及大矩阵产生,较好地降低了时间复杂度和空间复杂度。
Based on the usually used stability theory for the normal steel structure , the non - stability are divided into three sorts according to the performance after instability , as the balance fork instability , jump instability and extreme point instability 根据一般钢结构应用的稳定理论，常按屈曲后性能将失稳分为以下三类：平衡分岔失稳、跃越失稳和极值点失稳。
And comparing with the standard simulated annealing algorithm and genetic algorithm , this algorithm has rapider converge speed and the strong global optimize performance of divorcing from local extreme point and avoiding converging too early 且理论上可以证明其相对于标准模拟退火算法、遗传算法有更快的收敛速度及很强的脱离局部极值点和避免过早收敛的全局优化能力。
Aimed at the ga ' s disadvantages : weak local optimization , easiness of falling into local extremum , this thesis presents an improved ga which introduces two operators " local search " and " adaptively avoid entropy decreasing " 针对遗传算法局部搜索能力差及容易陷入局部极值点的缺陷，提出一种改进的遗传算法，引入了“局部搜索?均值方差阀值”和“自适应防止熵减”两个算子。
By whitening the covariance matrix of flat ambiguity , correlation between ambiguity components , the number of local extrema of cost function is reduced . the search program getting into precocity is avoided by suitable encoding and genetic operation 通过白化处理模糊度，减少模糊度搜索中指标函数的局部极值点，采用适当的编码和遗传操作使得在种群个体较少的情况下避免搜索陷入早熟。
Comparison of the folt induced by colored noise in intensity and phase fluctuations shows that the number of the extremum in the steady state distribution is changed from one to two , and then to three successively for colored noise intensity fluctuation 对色噪声强度涨落和色噪声位相涨落诱导的一级相变类比进行比较表明，色噪声强度涨落情形下，定态分布函数的极值点由一个变为两个，再变为三个。
Blade design optimization problems are multimodal and discontinuous problems , the use of gradient - based numerical optimization algorithms perform inefficiently and drop into local minimum prematurely . hence , the exploratory algorithms such as gas are required for global exploration . 4 4 .通过rsm方法拟合复杂的响应关系，平滑设计空间“噪声” ，能够防止数值优化方法陷入局部极值点，获得良好的鲁棒性和适应性。
The proposed algorithms have both the properties of the original particle swarm optimization algorithm and the immune mechanism of immune system , so as to improve the abilities of seeking the global excellent result and evolution speed 这种免疫粒子群优化算法结合了粒子群优化算法具有的全局寻优能力和免疫系统的免疫信息处理机制，实现简单，改善了粒子群优化算法摆脱局部极值点的能力，提高了算法进化过程中的收敛速度和精度。
