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- W2532609487 abstract "使用光谱仪采集到的信号难免受到不同噪声源的影响。为了提高光谱信号解析的精准度，通过分析小波应用于信号降噪的原理以及经典的软、硬阈值降噪法存在的缺陷，提出了一种改进的阈值降噪法。该方法既克服了硬阈值法产生间断点，软阈值法产生恒定偏差的缺陷，又尽量地保留了有用信号。实验选用的小波基函数为SymletsA，分解层数为4，结合BirgeMassart策略模型确定的分层阈值对硒化镉量子点荧光光谱信号进行降噪处理。结果表明，与经典的软、硬阈值降噪法相比，通过改进阈值降噪法得到重构信号的信噪比（SNR=47.550 2）、能量占比（PER=0.973 3）和均方误差（MSE=149.421 3）均有提高和改善。" @default.
- W2532609487 created "2016-10-28" @default.
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- W2532609487 date "2016-01-01" @default.
- W2532609487 modified "2023-09-26" @default.
- W2532609487 title "Fluorescence spectrum denoising of quantum dots based on improved wavelet threshold" @default.
- W2532609487 doi "https://doi.org/10.5768/jao201637.0302006" @default.
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