In this paper , an improved genetic algorithm ( ga ) was applied to the design of high performance e - plane waveguide filters at the first time . for dealing with the shortcoming of ga as low efficiency in local optimum searching , the idea based on parallel genetic algorithm ( pga ) known as separate local optimization was presented . by separating the whole population into sub - populations , and adding a new operator known as crossover between two sub - population , the new method can provide as 2 3 times quickly as traditional ga . all numerical examinations illustrated the high convergence speed and good global searching of the new algorithm , and proved the validity of it 由于遗传算法表现出良好的全局搜索性能，因此本文将其应用于高性能e面波导滤波器的设计中.针对传统遗传算法所存在的局部搜索能力差的缺点，本文在并行遗传算法的基础上，通过将原有群体划分为多个子群体，利用多个子群进行局部极值点的搜索，并利用群间迁徙，使改进后的算法收敛速度平均提高了2 3倍.数值实验表明算法具有较快的收敛速度和较好的全局搜索性能，证明了算法的有效性
At first we improve the methods of iris image preprocessing , including an efficient arithmetic of evaluation iris images , an improving method of locating iris , calibrating iris image by the translation of coordinate and the circular shift of code , a eatimate of the background illumination by bicubic spline , and the image enhancement by the dual tree complex wavelet transform . next we designed the recognition arithmetic based on the location of the local maxima of the wavelet transform modulus . in the thesis lots of simulation are performed by means of matlab and visual c + + 首先改进了虹膜预处理方法,实现了一种快速高效的虹膜质量评价算法;设计了一种改进的两步虹膜定位算法,准确的定位了虹膜的内外边界;利用坐标转换和编码的循环移位实现了对虹膜图像的配准;利用双三次样条函数拟合虹膜图像背景,去除了非均匀光照对虹膜识别的影响;使用二分树复数小波方法增强了虹膜图像的对比度;在识别算法方面,本文设计了一种“基于小波模极值点位置的虹膜识别算法” 。
This paper is described wavelet transform theory , mother wavelet choice , the method to filter signal by wavelet transform and the result , prospered a way to extract feature originated from wavelet theory , which using wavelet packet analyzing method to subdivide signal both in low frequency and high frequency field , and consider energy of every layer as feature in frequency field , and in conjunction with the detailed analyzing character of wavelet packet in time - frequency plane , consider several minimum or maximum points in the lowest frequency band a s features in the time field 本文介绍了小波变换的理论、基小波的选择和利用小波变换进行信号滤波的方法和滤波处理结果，并提出了一种基于小波理论的新的特征值提取方法。即利用小波包分析方法将信号在低频、高频段作进一步的细分，以各层分解的能量作为信号的频域特征值，以最低频带的极值点作为时域特征值，这样的特征值选取方法较全面的反映了信号的时-频特征，优于传统的傅里叶分析方法。
From the side of supervision engineers and by means of investgation , demonstration and anaylysis , this article presents the same basis of the three targets - the schedule , quality and investment - in order to obtain the most economic effect . from theory , this article also gives the limit points to find the limit points to find the faster progess , the reasonable quality and minimal investment 本文从监理工程师的角度出发，通过调查、认证和分析，提出工程项目监理的进度、质量、投资三大目标的共同基点是取得最大的投资效益，从理论上提出了如何寻求进度较快、质量适合、投资最省的极值点，并从业主的角度给出求极值点的量化公式。
On the basis of the geochemistry digital model arithmetic of triangulated irregular network , i change the arithmetic of auto - tracing isoline . in process of auto - tracing isoline , the proplem of tracing - crossand and mini - heave was resolved . the isoline is smoothec by linear overlap algorithm . in addtion , the model can build other unit of map such as extramum point , polygon 在不规则三角网数字模型的基础上，改进并实现了等值线生成算法，解决了等值线生成中的分叉问题，解决了等值线上的小凸起问题；对等值线采用线性迭代算法进行了圆滑处理；提出延伸三角网算法，用于实现了开等值线的闭合；生成用于地学分析的区域图元，等值线图元，极值点图元等。
