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Application of a neural network model with multimodal fusion for fluorescence spectroscopy

NUCLEAR SCIENCE AND TECHNIQUES 2024年第10期35卷 1-14页

作者： Tang, Lin Zhou, Shuang Shi, Kai-Bo Shen, Hong-Tao You, Lei Chengdu Univ Coll Elect Informat & Elect Engn Chengdu 610106 Peoples R China Guangxi Normal Univ Guangxi Key Lab Nucl Phys & Nucl Technol Guilin 541004 Peoples R China Anhui Univ Natl Engn Res Ctr Agroecol Big Data Anal & Applica Hefei 230039 Peoples R China Nanyang Technol Univ Sch Elect & Elect Engn Singapore 639798 Singapore Panzhihua Univ Vanadium & Titanium Resource Comprehens Utilizat K Panzhihua 617000 Peoples R China Chengdu Normal Univ Inst Higher Educ Sichuan Prov Key Lab Interior Layout Optimizat & Secur Chengdu 611130 Peoples R China

In energy-dispersive X-ray fluorescence spectroscopy, the estimation of the pulse amplitude determines the accuracy of the spectrum measurement. The error generated by the amplitude estimation of the pulse output distorted by the measurement system leads to false peaks in the measured spectrum. To eliminate these false peaks and achieve an accurate estimation of the distorted pulse amplitude, a composite neural network model is proposed, which embeds long and short-term memory (LSTM) into the UNet structure. The UNet network realizes the fusion of pulse sequence features and the LSTM model realizes pulse amplitude estimation. The model is trained using simulated pulse datasets with different amplitudes and distortion times. For the pulse height estimation, the average relative error of the trained model on the test set was approximately 0.64%, which is 27.37% lower than that of the traditional trapezoidal shaping algorithm. Offline processing of a standard iron source further validated the pulse height estimation performance of the UNet-LSTM model. After estimating the amplitude of the distorted pulses using the model, the false peak area was reduced by approximately 91% over the full spectrum and was corrected to the characteristic peak region of interest (ROI). The corrected peak area accounted for approximately 1.32% of the characteristic peak ROI area. The results indicate that the model can accurately estimate the height of distorted pulses and has substantial corrective effects on false peaks.

关键词： UNet Long- and short-term memory Pulse distortion Pulse height estimation fluorescent spectroscopy

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Synthesis and Characterization of the cis-Dicyanoiron(Ⅱ) Building Block and Its Interactions with Selected Metal Ions

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Chinese Journal of Structural Chemistry 2020年第9期39卷 1714-1722,1557页

作者： HU Jian-Mei WANG Yong Hubei Key Laboratory of Drug Synthesis and Optimization Medical Innovation Research InstituteJingchu University of TechnologyJingmenHubei 444800China

In this work,a cis-dicyanoiron(Ⅱ)building block,cis-FeⅡ(bpy)2(CN)2(1,bpy=2,2?-bipyridine),has been prepared and fully characterized by IR,electronic absorption spectra,elemental analysis,cyclic voltammetry and single-crystal X-ray diffraction *** interactions of complex 1 with selected metal ions,such as Cu(Ⅱ),Fe(Ⅲ),Pb(Ⅱ),Fe(Ⅱ),Cr(Ⅲ),Cd(Ⅱ),Co(Ⅱ),Zn(Ⅱ),Ni(Ⅱ)and Mn(Ⅱ),were investigated employing electronic absorption *** electronic absorption spectroscopy indicates Cu(Ⅱ),Fe(Ⅲ),Cr(Ⅲ),Cd(Ⅱ),Co(Ⅱ),Zn(Ⅱ)and Ni(Ⅱ)ions steadily coordinate with 1 via cyanide,*** emission intensity of 1 increased upon the addition of Zn(Ⅱ)ion,quenched by adding ions Cu(Ⅱ),Fe(Ⅲ)and Pb(Ⅱ),and it was almost unchanged when adding the Fe(Ⅱ),Cr(Ⅲ),Cd(Ⅱ),Co(Ⅱ),Ni(Ⅱ)and Mn(Ⅱ)ions.

关键词： cyanide iron(Ⅱ) molecular structure electronic absorption spectroscopy fluorescent spectroscopy

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Synthesis and Characterization of a Terpyridine Ligand and Its Interactions with Selected Metal Ions

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Chinese Journal of Structural Chemistry 2020年第4期39卷 783-792页

作者： YU Meng HU Jian-Mei WANG Yong Hubei Key Laboratory of Drug Synthesis and Optimization Jingchu University of TechnologyJingmenHubei 444800China

In this work,a terpyridine ligand L,(4΄-phenyl-2,2΄:6΄,2΄΄-terpyridine),was synthesized and fully *** of the ligand with selected metal ions like Cu(Ⅱ),Fe(Ⅲ),Pb(Ⅱ),Fe(Ⅱ),Cr(Ⅲ),Cd(Ⅱ),Co(Ⅱ),Zn(Ⅱ),Ni(Ⅱ)and Mn(Ⅱ)were *** to ligand L,only Fe(Ⅱ)and Pb(Ⅱ)ions show new band in electronic absorption *** spectroscopy indicates that Zn(Ⅱ)and Cd(Ⅱ)ions enhance the emission intensity of ligand L,and other selected ions quench emission *** explore how Fe(Ⅱ)ion interacts with ligand L,Fe(L)-based complex 1 was synthesized,spectroscopic studies and single-crystal X-ray diffraction *** implies ligand L has an excellent selectivity for Zn(Ⅱ)and Cd(Ⅱ)ions.

关键词： Fe(Ⅱ)ion molecular structure terpyridine electronic absorption spectroscopy fluorescent spectroscopy

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Study to mechanism of fluorescence enhancement of Dy3＋-Gd3＋- SSA-CTMAB system by resonance scattering-light spectroscopy

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Journal of Chemistry and Chemical Engineering 2009年第12期3卷 1-6,14页

作者： SA Pan-pan LIU Xiao-yan YAO Yuan-yuan ZHENG Zhi-gang ZHANG Xiao-wei YIN Hong-zong College of Chemistty and Material Science Shandong Agricultural University Taian 271018 China

The fluorescence enhancement mechanism of Dy3＋-Gd3＋- SSA-CTMAB system was studied by the resonance light scattering and fluorescence spectrum. In this paper, the influencing factors including the concentration of Gd3＋, ligands, pH value as well as surfactants were studied. As a result, the optimal experimental conditions were obtained. The existence of molecule congeries was proved by scattering-light spectrum.

关键词： dysprosium gadolinium sulfonic salicylic acid (SSA) hexadecyl trimethyl ammonium bromide (CTMAB) fluorescent spectroscopy resonance scattering- light spectroscopy fluorescence enhancement

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