高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (4): 605.

• 论文 • 上一篇    下一篇

基于周期调节的随机共振算法对化学弱信号的检测研究

潘忠孝, 吴晓静, 郭卫民, 蔡文生, 邵学广   

  1. 中国科学技术大学化学系, 合肥 230026
  • 收稿日期:2002-06-12 出版日期:2003-04-24 发布日期:2003-04-24
  • 通讯作者: 邵学广(1963年出生),男,博士,教授,博士生导师,主要从事化学计量学及分子模拟研究.E-mail:xshE-maiao@usE-maitc.edu.cn E-mail:xshE-maiao@usE-maitc.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20075024)

Studies on the Detection of Weak Chemical Signal by Using a StochasticResonance Algorithm Based on Periodic Modulation

PAN Zhong Xiao, WU Xiao Jing, GUO Wei Min, CAI Wen Sheng, SHAO Xue Guang   

  1. Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
  • Received:2002-06-12 Online:2003-04-24 Published:2003-04-24

PDF (PC)

被引次数

18

摘要： 提出了一种新的随机共振算法,通过对系统的周期进行调节以实现系统的共振.讨论了实现共振的系统参数,并对模拟信号和拉曼光谱实验信号进行了处理.结果表明,该方法不仅可方便地用于弱化学信号的处理,克服检出信号的滞后现象,而且对不同噪声水平的信号均有良好的适用性.

关键词: 随机共振算法, 周期调节, 弱信号检测, 激光拉曼光谱

Abstract: A new stochastic resonance algorithm for detection of weak chemical signal was proposed. The algorithm was achieved through periodic modulation to realize the system resonance. After a detailed discussion of the parameters in the system, a simulated signal and experimental noisy signals of a set of CCl4 sample were analyzed by the method. It was proven that the proposed algorithm is very efficient in improving the signal to noise ratio of weak signals and a good performance of detection of weak signals with different S/N ratio can be ensured under the optimized conditions.

Key words: Stochastic resonance algorithm, Periodic modulation, Weak signal detection, Laser Raman spectrum

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