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Study on the Noise Reduction of Vehicle Exhaust NOX Spectra Based on Adaptive EEMD Algorithm
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نویسنده
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zhang k. ,zhang y. ,you k. ,he y. ,gao q. ,liu g. ,he c. ,lu y. ,fan b. ,tang q. ,liu w.
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منبع
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journal of spectroscopy - 2017 - دوره : 2017 - شماره : 0
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چکیده
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It becomes a key technology to measure the concentration of the vehicle exhaust components with the transmission spectra. but in the conventional methods for noise reduction and baseline correction,such as wavelet transform,derivative,interpolation,polynomial fitting,and so forth,the basic functions of these algorithms,the number of decomposition layers,and the way to reconstruct the signal have to be adjusted according to the characteristics of different components in the transmission spectra. the parameter settings of the algorithms above are not transcendental,so with them,it is difficult to achieve the best noise reduction effect for the vehicle exhaust spectra which are sharp and drastic in the waveform. in this paper,an adaptive ensemble empirical mode decomposition (eemd) denoising model based on a special normalized index optimization is proposed and used in the spectral noise reduction of vehicle exhaust nox. it is shown with the experimental results that the method can effectively improve the accuracy of the spectral noise reduction and simplify the denoising process and its operation difficulty. © 2017 kai zhang et al.
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آدرس
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key laboratory of environmental optics and technology,anhui institute of optics and fine mechanics,chinese academy of sciences,hefei,anhui province,china,university of science and technology of china,hefei,anhui province,china,key laboratory of optical monitoring technology for environment,hefei,anhui province, China, key laboratory of environmental optics and technology,anhui institute of optics and fine mechanics,chinese academy of sciences,hefei,anhui province, China, key laboratory of environmental optics and technology,anhui institute of optics and fine mechanics,chinese academy of sciences,hefei,anhui province, China, key laboratory of environmental optics and technology,anhui institute of optics and fine mechanics,chinese academy of sciences,hefei,anhui province,china,university of science and technology of china,hefei,anhui province, China, key laboratory of environmental optics and technology,anhui institute of optics and fine mechanics,chinese academy of sciences,hefei,anhui province,china,university of science and technology of china,hefei,anhui province, China, key laboratory of environmental optics and technology,anhui institute of optics and fine mechanics,chinese academy of sciences,hefei,anhui province,china,university of science and technology of china,hefei,anhui province, China, key laboratory of environmental optics and technology,anhui institute of optics and fine mechanics,chinese academy of sciences,hefei,anhui province,china,university of science and technology of china,hefei,anhui province, China, key laboratory of environmental optics and technology,anhui institute of optics and fine mechanics,chinese academy of sciences,hefei,anhui province,china,university of science and technology of china,hefei,anhui province, China, key laboratory of environmental optics and technology,anhui institute of optics and fine mechanics,chinese academy of sciences,hefei,anhui province,china,university of science and technology of china,hefei,anhui province, China, key laboratory of environmental optics and technology,anhui institute of optics and fine mechanics,chinese academy of sciences,hefei,anhui province,china,university of science and technology of china,hefei,anhui province, China, key laboratory of environmental optics and technology,anhui institute of optics and fine mechanics,chinese academy of sciences,hefei,anhui province, China
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Authors
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