On the Circulant and Aperiodic Models of Deconvolution

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乳清酸的2.5次微分示波极谱法测定

拟定了乳清酸的2.5次微分示波极谱测定新方法.结果表明在0.8 mol/L HCl介质中,乳清酸产生一灵敏的极谱还原波,峰电位Ep =-0.77 V(vs.SCE);其2.5次微分极谱峰峰电流ep″与乳清酸浓度在4.0×10-8～4.0×10-5 mol/L范围内呈良好线性关系(r=0.999 6,n=9),检测限为1.0×10-8 mol/L;13次平行测量4.0×10-7 mol/L乳清酸的峰电流,所得RSD为1.8%.该方法可直接用于测定牛奶中乳清酸的含量.     

一种新的尖峰信号盲反卷积方法

介绍一种新的盲反卷积方法，以解决尖峰信号的盲卷积问题，该方法不需知道信号和噪声的先验知识。基于尖峰信号高斯混合模型，给出一个自适应反卷积滤波器和一个自适应零记忆非线性估计器，以实现信号的恢复。将进化计算和梯度算法相结合，对反卷积滤波器和零记忆非线性估计器进行参数寻优，从而获得良好的信号恢复效果。最后给出计算机仿真结果。     

计算机辅助解析FTIR定量研究蛋白质构象的应用进展

综述了计算机辅助解析傅里叶变换红外光谱在蛋白质构象定量研究中的应用进展,简要介绍了红外光谱测定及二阶导数谱、去卷积和曲线拟合等计算机数学处理方法.对已有的研究结果进行了分类总结,最后讨论了该领域中存在的问题和发展方向.     

A gas chromatography/mass spectrometry method for the simultaneous analysis of 50 phenols in wastewater using deconvolution technology

Phenolic compounds exist widely in the influents and effluents of sewage treatment plants (STPs) and most are un-regulated. In this study, a gas chromatography-mass spectrometry (GC-MS) method for the simultaneous analysis of 50 phenolic compounds in wastewater was developed. Deconvolution technology was used to identify contaminants that are covered by co-extracted materials. A mass spectral library containing all 50 silylated phenolic compounds was first established and used for deconvolution. Twelve typical phenolic compounds were selected to optimize the sample preparation procedures. Solid-phase extraction using a C18 cartridge coupled with an HLB cartridge was used for pre-concentration and dichloromethane was used for elution. The solutes were derivatized and analyzed by GC-MS. The blank and matrix spike recoveries ranged from 57.46% to 136.4% and 47.87% to 114.8%, respectively. Method detection limits ranged from 3.64 to 97.64 ng L⁻¹. The relative standard deviations of all the recovery experiments were lower than 13.6%. The instrument limits of quantification ranged from 0.7 to 87.7 pg. The method has been applied to analyze the influents and effluents of 5 Chinese STPs. Except for regulated phenolic compounds (phenol and 2,4,6-trichlorophenol), three un-regulated phenolic compounds, including 2-chlorophenol, 2,5-dichlorophenol and 2,4-dichloro-3-ethyl-6-nitrophenol were identified in the effluent wastewater. The detected concentrations of un-regulated phenolic compounds could possibly cause environmental effects, indicating that immediate attention is required to prevent complications.     

Satellite Image Adaptive Restoration Using Periodic Plus Smooth Image Decomposition and Complex Wavelet Packet Transforms

A satellite image adaptive restoration method was developed that avoids ringing artifacts at the image boundary and retains oriented features. The method combines periodic plus smooth image decomposition with complex wavelet packet transforms. The framework first decomposes a degraded satellite image into the sum of a "periodic component" and a "smooth component". The Bayesian method is then used to estimate the modulation transfer function degradation parameters and the noise. The periodic component is deconvoluted using complex wavelet packet transforms with the deconvolution result of the periodic component then combined with the smooth component to get the final recovered result. Tests show that this strategy effectively avoids ringing artifacts while preserving local image details (especially directional textures) without amplifying the noise. Quantitative comparisons illustrate that the results are comparable with previous methods. Another benefit is that this approach can process large satellite images with parallel processing, which is important for practical use.     

基于双通性重现视网膜图象的解卷积方法

根据人眼光学系统的双通性，论证了从眼底视网膜的反射光出发，沿光传输的逆方向，用计算机实现解卷积的方法，可恢复出视网膜上输入光束的成象。该解卷积算法获得的眼球光学系统的点扩散函数和光学传递函数，可用来评价视网膜图象的质量。介绍了实现上述求解过程的一种光学－数字－计算机混合系统以及使用该系统的仿真结果。结果证明，该系统具有客观性强，可自动校准以及可动态记录等优点。     

声发射定量技术

本文介绍了近年发展起来的声发射定量技术。     

退卷积过程中的低能尾修正

本文详述了康普顿轮廓测量退卷积处理过程中,关于低能端谱形畸变(即低能尾)的修正的思路和具体方法     

基于频域数字反卷积的磁场测量技术

车辆及舰船的磁场是超低频交变弱磁场。测量车辆和舰船的近场磁场分布是研究车辆或舰船磁场特征的基础。介绍了将频域数字反卷积算法应用到交变弱磁场测量，用软件积分取代模拟积分器，不但简化了磁场测量仪器的硬件，同时用系统的冲激响应修正了系统的固有误差。基于此原理研制的车辆磁场测量系统验证了这种测量方法的可行性与准确性。