基于周期调节的随机共振算法对化学弱信号的检测研究  

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

作　　者：潘忠孝[1] 吴晓静[1] 郭卫民[1] 蔡文生[1] 邵学广[1] 

机构地区：[1]中国科学技术大学化学系,合肥230026

出　　处：《高等学校化学学报》2003年第4期605-608,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 0 0 75 0 2 4)

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 。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 CCl 4 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.

关 键 词：化学弱信号 随机共振算法 周期调节 信号检测 激光拉曼光谱 分析化学 

分 类 号：O65[理学—分析化学] TN911.23[理学—化学]