电子学报 ›› 2014, Vol. 42 ›› Issue (8): 1571-1576.DOI: 10.3969/j.issn.0372-2112.2014.08.017

• 学术论文 • 上一篇    下一篇

基于解空间收缩的差分进化算法的CLAD序列优化

黄江华, 李彬, 王涛   

  1. 南方医科大学生物医学工程学院, 广东广州 510515
  • 收稿日期:2013-06-18 修回日期:2013-10-28 出版日期:2014-08-25
    • 通讯作者:
    • 王涛
    • 作者简介:
    • 黄江华女,1988年8月出生,重庆忠县人.现为南方医科大学生物医学工程专业硕士研究生,主要研究方向为生物电信号处理.E-mail:jianghua_huang@126.com;李彬男,1964年3月出生,河南焦作人.教授、博士.主要研究方向为医学图像处理、优化算法.E-mail:libin371@smu.edu.cn
    • 基金资助:
    • 国家自然科学基金 (No.61172033,No.61271154)

Optimization of CLAD Sequences Based on Solution-Space Contraction Strategy for Differential Evolution Algorithm

HUANG Jiang-hua, LI Bin, WANG Tao   

  1. School of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong 510515, China
  • Received:2013-06-18 Revised:2013-10-28 Online:2014-08-25 Published:2014-08-25
    • Supported by:
    • National Natural Science Foundation of China (No.61172033, No.61271154)

摘要:

连续循环平均去卷积(Continuous Loop Averaging Deconvolution,CLAD)方法是近年来提出的高刺激率条件下提取听觉诱发电位(Auditory Evoked Potential,AEP)的有效方法.该方法对刺激序列的频域特性提出限制,给刺激序列的生成带来挑战.本文在差分进化(Differential Evolution,DE)算法的基础上,提出一种解空间收缩的差分进化(solution-space contraction DE,scDE)算法;该算法将刺激序列的频域约束和抖动量融合成一个单目标优化函数.根据抖动量的变化范围,提出新的变异算子,在维持种群多样性的同时保证搜索空间动态缩减从而生成有序性的最优刺激序列.该方法可以自动地生成各种参数下的低抖动率刺激序列,和传统随机生成序列人工筛选方式相比在保证噪声抑制能力的同时工作效率大大提高且抖动率更小.

关键词: 差分进化算法, 去卷积, 听觉诱发电位

Abstract:

Continuous loop averaging deconvolution (CLAD) is a newly developed method to recover the transient auditory evoked potential (AEP) from responses evoked by high stimulus rate sequences.This method brings forward a challenge in the generation of an appropriate stimulus sequence which will affect the deconvolution performance.We proposed a variant of differential evolution (DE) algorithm,namely solution-space contraction differential evolution (scDE) algorithm to optimize the sequence associated with an objective function defined in terms of the jitter ratio (JR) and the constraint condition in frequency domain.A dynamic scaling factor F in the mutation process was formulated to guarantee the gradual reduction of the searching-space.The scDE algorithm can be efficient in generating required sequences under various conditions with lower JR.This study is thus significant in promoting the application of CLAD method in basic and clinical research.

Key words: differential evolution (DE) algorithm, deconvolution, auditory evoked potential (AEP)

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