Based on systemic analysis and comparison of the two types of mutation operators in the success probability, local convergence velocity, global convergence performance, mutation step-size control, computation costs, multi-population technique, single-population ES and multi-population ES based on single-ge.
现有的变异算子都使用全基因变异,本文提出单基因变异,通过对变异成功概率、局部收敛速度、全局收敛性能、变异步长控制、计算开销、多种群技术系统地分析比较两种变异方式的优劣,建立基于递减型变异步长单基因变异算子的单种群和多种群进化策略,最后论述进化算法仿真试验平台的构建及其应用。
The mutation step-size control for monogenic-mutation-based evolution strategies(ES)is investigated.
首先研究单基因变异进化策略(ES:evolution strategies)的变异步长控制,对变异步长与改进率的关系作理论分析,建立了基于单基因变异ES的变异步长控制策略。
By tuning the variance of the mutation operator according to the feedback information,changed the mutation step of ES with the current searching result.
为了提高进化策略的搜索精度和全局搜索能力,提出了一种基于反馈和混沌变异的改进进化策略,将各代当前最优搜索结果反馈到变异步长的更新公式中,通过对变异算子中随机数方差的调整使进化策略的变异步长随搜索过程自适应地变化,同时根据混沌运动具有遍历性的特点,利用混沌变异产生个体,保证种群中的部分个体在搜索后期仍保持较大的跳出局部极小的能力,从而达到提高算法全局搜索能力和搜索精度。
Using reactive radio-frequency magnetron sputtering,ZnO films have been deposited on Si(001)substrate with a two-step growth method.
利用反应射频磁控溅射技术,采用两步生长方法制备了ZnO薄膜,探讨了基片刻蚀时间和低温过渡层沉积时间对ZnO薄膜生长行为的影响。
Monocrystalline GaAs layer grown on (100),(111) and (211) Si substrate by hot wall epitaxy two-step growth and direct growth is reported.
报道了采用热壁外延 (HWE)技术 ,在 (10 0 ) ,(111)和 (2 11)三种典型Si表面通过两步生长和直接生长法制备GaAs单晶薄膜 ,经过拉曼光谱、霍尔测试和荧光光谱分析比较 ,得出结论 :(1)相同取向Si衬底 ,两步生长法制备的GaAs薄膜结晶质量比直接生长法制备的GaAs薄膜的要好 ;(2 )采用HWE技术在Si上异质外延GaAs薄膜 ,其表面缓冲层的生长是降低位错、提高外延质量的基础 ;(3)不同取向Si衬底对GaAs外延层结晶质量有影响 ,(2 11)面外延的GaAs薄膜质量最好 ,(10 0 )面次之 ,(111)面最
Theoretical Analysis on the Epitaxial Lateral Overgrowth and Experiment Research on the Two Step Method;
横向外延技术的理论分析与两步生长法的实验研究
The Synthesis of One-dimensional GaN Nano Structures and Crystal Films with Two Steps Growth Pattern;
两步生长模式合成一维GaN纳米结构和GaN晶体膜的研究
Growth and Synchrony of Reproductive Organs in Males and Females of Rana pleuraden in Kunming Area,Yunnan
昆明地区滇蛙两性生殖器官的生长及发育同步性
Research on the Rational Change of Length of the Last Two Steps in Broad Jump;
对跳远助跑最后两步步长变化合理性的研究
Every day the old man took a walk on the road edged with grass
老人每天在那条两边长草的路上散步。
Output Increase steadily over the last two quarter .
再上两个季节里产量稳步增长。
(of a metric foot) characterized by two short syllables followed by a long one.
（指音步韵律）两个短音后跟一个长音。
diauxic growth curve
二次[两期]生长曲线
The length of the two steel wires is adjustable, make the precision of the synchronization higher.
两钢丝绳长短可调节,使同步精度达到很高.
A ballroom dance in2/4 time, characterized by long, sliding steps.
两步舞节拍为2／4拍的舞厅舞，其特点是长的滑步
Bioactivation of Pure Titanium Surface by Improved Acid-Alkali Two Steps Approach;
改良的酸—碱两步法纯钛表面生物活化
Education and Hygiene: Two Moves of Great Importance in Developing Chongqing;
教育与卫生:重庆大开发重要的两步棋
Preparation of Biodiesel from Tung oil by Two-step Catalyzed Process
两步法催化桐油制备生物柴油的研究
Two-step pretreatment of viscose/linen fabric with enzyme
粘胶/亚麻织物生物酶两步法前处理
Preliminary Observing and Probing with Regard to Effect of Grown Prescription on Cordyceps Militaris in Cultivate
生长剂对北虫草生长影响的初步观察与探讨
a metrical unit with unstressed-unstressed-stressed syllables.
两短一长或两轻一重的三音节所组成的一个音步的。
Take two steps forward and two steps back.
前进两步，然后后退两步。
Pinocchio took a couple of steps... and a couple more.
皮诺奇走了两步……又两步。