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Effective and robust approach for fluorescence molecular tomography based on CoSaMP and SP_(3)model

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Journal of Innovative Optical Health Sciences 2016年第6期9卷 66-76页

作者： Xiaowei He Hongbo Guo Jingjing Yu Xu Zhang Yuqing Hou Northwest University School of Information Sciences and Technology Xi'an P.R.China 710069 Shaanxi Normal University School of Physics and Information Technology Xi'an P.R.China 710062

Fluorescence molecular tomography(FMT)allows the detection and quantification of various biological processes in small animals in vrivo,which expands the horizons of pre clinical rescarch and drug development.Eficient three dimensional(3D)reconstruction algorithm is the key to accurate localization and quant ification of fAuorescent target in FMT.In this paper,3D recon-struction of FMT is regarded as a sparse signal recovery problem and the compressive sampling matching pursuit(CoSaMP)algorithm is adopted to obtain greedy recovery of fuorescent sig-nals.Moreover,to reduce the modeling error,the simplified spherical harmonics approximation to the radiative transfer equation(RTE),more specifically SP_(3),is utilized to describe light prop-agation in biological tissues.The performance of the proposed reconstruction method is thor-oughly evaluated by simulations on a 3D digital mouse model by comparing it with three representative greedy methods including orthogonal matching pursuit(OMP),stagewise OMP(StOMP),and regularized OMP(ROMP).The CoSaMP combined with SP_(3)shows an im-provement in reconstruction accuracy and exhibits distinct advantages over the comparative algorithms in multiple targets resolving.Stability analysis suggests that CoSaMP is robust to noise and performs stably with reduction of measurements.The feasibility and reoonstruction accuracy of the proposed method are further validated by phantom experimental data.

关键词： Tomography image reconstruction techniques medical and biological imaging inverse problems

High-Performance Ionic Thermoelectric Supercapacitor for Integrated Energy Conversion-Storage

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Energy & Environmental Materials 2022年第3期5卷 954-961页

作者： Xinyu Yang yuqing Tian Bo Wu Wei Jia Chengyi hou Qinghong Zhang Yaogang Li Hongzhi Wang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201600China State Key Laboratory for Space Power Sources Technology Shanghai 201600China Engineering Research Center of Advanced Glasses Manufacturing Technology Ministry of Education Donghua UniversityShanghai 201600China

Converting low-grade waste heat into usable electricity and storing it simultaneously requires a new technology that realize the directional migration of electrons or ions under temperature difference and enrichment on the electrodes.Although the urgent demand of energy conversion-storage(ECS)has emerged in the field of wearable electronic,achieving the integrated bi-functional device remains challenge due to the different mechanisms of electrical transportation and storage.Here,we report an ionic thermoelectric supercapacitor that relies on the synergistic functions of thermoelectricity and supercapacitor in the thermoelectric ionogel electrolyte and high-performance hydrogel electrodes to enhance the ECS performance under a thermal gradient.The thermoelectric electrolyte is composed of polyacrylamide hydrogel and sodium carboxymethyl cellulose(PMSC),possessing cross-linked network with excellent cation selectivity,while the ionic thermoelectric properties are further improved in the presence of NaCl.The corresponding Seebeck coefficient and ionic conductivity of the NaCl–PMSC electrolyte reach 17.1 mV K^(-1)and 26.8 mS cm^(-1),respectively.Owing to good stretchability of both gel-based electrolyte and electrode,the fullstretchable integrated ECS device,termed ionic thermoelectric supercapacitor,presents promising thermal-charge storage capability(~1.3 mC,ΔT≈10 K),thus holds promise for wearable energy harvesting.

关键词： integrated device ionic thermoelectric supercapacitor ionogel stretchable

Adaptive hp finite element method for fluorescence molecular tomography with simplified spherical harmonics approximation

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Journal of Innovative Optical Health Sciences 2014年第2期7卷 70-81页

作者： Hongbo Guo Yuqing Hou Xiaowei He Jingjing Yu Jingxing Cheng Xin Pu School of Information Sciences and Technology Northuest University Xi'an710069P.R.China School of Physics and Information Technology Shaanxi Normal University Xi'an710062P.R.China

Recently,the simplified spherical harmonics equations(SP)model has at tracted much att entionin modeling the light propagation in small tissue ggeometriesat visible and near-infrared wave-leng ths.In this paper,we report an eficient numerical method for fluorescence moleeular tom-ography(FMT)that combines the advantage of SP model and adaptive hp finite elementmethod(hp-FEM).For purposes of comparison,hp-FEM and h-FEM are,respectively applied tothe reconstruction pro cess with diffusion approximation and SPs model.Simulation experiments on a 3D digital mouse atlas and physical experiments on a phantom are designed to evaluate thereconstruction methods in terms of the location and the reconstructed fluorescent yield.Theexperimental results demonstrate that hp-FEM with SPy model,yield more accurate results thanh-FEM with difusion approximation model does.The phantom experiments show the potentialand feasibility of the proposed approach in FMT applications.

关键词： Fluorescence molecular tomog maphy simplified spherical harmonics equations reconstruction adaptive finite element method.

N,S-Doped Carbon Dots as Additive for Suppression of Zinc Dendrites in Alkaline Electrolyte

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中国化学:英文版 2023年第14期41卷 1697-1704页

作者： Shan Cai Ge Chang Jiugang Hu Jiae Wu yuqing Luo Guoqiang Zou Hongshuai hou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangshaHunan410083 China

The severe dendrite growth on zinc anode in alkaline electrolyte brings great challenge to the development of zinc-based batteries.It is a simple and effective strategy to inhibit zinc dendrite formation by introducing additives into the electrolyte.In this study,N,S-doped carbon dots(TU-CQDs)were synthesized and used as additives to regulate zinc deposition in a typical KOH electrolyte.The experimental and three-dimensional transient nucleation model disclosed that the special functional groups of carbon dots can change the electrode surface state and the coordination behaviors of zinc species in the electrolyte.Therefore,TU-CQDs can not only inhibit the hydrogen evolution reaction,but also achieve uniform zinc deposition.The in-situ synchrotron radiation X-ray imaging elucidated that TU-CQDs can effectively inhibit the dendrite growth and improve the reversibility of zinc plating/stripping process.This work provides a feasible route for regulating the reversibility of zinc metal anode in alkaline electrolyte.

关键词： Zinc anode Carbon dots Alkaline electrolyte Dendrite-free Electrode interfacesI Electrolyte additives

Establishment of correlation between reaction kinetics and carbon structures in the char gasification process

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Carbon Resources Conversion 2023年第2期6卷 67-75页

作者： Zefeng Ge Xi Cao Zhenting Zha Yuna Ma Mingxun Zeng yuqing Wu Zenghui hou Huiyan Zhang Key Laboratory of Energy Thermal Conversion and Control School of Energy and EnvironmentSoutheast UniversityNanjing 210096PR China Institute of Clean Coal Technology East China University of Science and TechnologyP.O.Box 272Shanghai 200237PR China

For a gasification process,the char-CO_(2)gasification is the controlling step worthwhile to be deeply investigated.The article chosen corn stalk(CS),poplar sawdust(PS)and bagasse residue(BR)as the typical waste species derived from agricultural,forestal and industrial sources.The char-CO_(2)gasification behavior,reaction kinetics and carbon structure were studied to reveal the intrinsic factors determining the reaction kinetics.Generally,the carbon conversion and maximum conversion rate were influenced by the feedstocks species and char preparation temperatures,as influenced by ash proportion,potassium content in ash and carbon structure of char.The char-CO_(2)reaction for CS was subject more to the catalytic effect of alkali compositions,while pore structure affected more the gasification reaction for PS char.The isoconversional kinetic analysis indicated that the gasification reaction became stable at carbon conversion of 0.5.Subsequently,sectionalized kinetic parameters were calculated for the initial gasification temperature to the temperature reaching 50%conversion.The result showed that high initial gasification temperature increased the char-CO_(2)gasification barrier to hardly start the reaction but accelerate the reaction rate.The carbon structure analyses further clarified that the reaction activation energy was highly related to the microcrystalline structure of carbon,while the reaction rate was more determined by carbon pore structure.

关键词： Organic solid wastes Char gasification Activation energy Sectionalized kinetic Carbon structure

Thermo-kinetic connectivity by integrating thermo-kinetic correlation and generalized stability

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Journal of Materials Science & Technology 2022年第32期127卷 225-235页

作者： yuqing He Shaojie Song Jinglian Du Haoran Peng Zhigang Ding Huaiyu hou Linke Huang Yongchang Liu Feng Liu State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Analytical&Testing Center Northwestern Polytechnical UniversityXi’an 710072China School of Materials and Chemical Engineering Xi’an Technological UniversityXi’an 710021China Nano and Heterogeneous Materials Center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China State Key Lab of Hydraulic Engineering Simulation and Safety School of Materials Science&EngineeringTianjin UniversityTianjin 300072China

Designing structured materials with optimized mechanical properties generally focuses on engineering microstructures,which are closely determined by the processing routes,such as phase transformations(PTs)and plastic deformations(PDs).Both PTs and PDs follow inherent trade-off relation between thermodynamic driving force ΔG and kinetic energy barrier Q,i.e.,so-called thermo-kinetic correlation.By analyzing nucleation and growth and proposing a conception of negative driving force integrating strain energy,interface energy and any kind of energy that equivalently inhibits the PT itself,ΔG^(S),unified expressions for the thermo-kinetic correlation and generalized stability(GS)were derived for three kinds of PTs,i.e.,diffusive PTs with simultaneously decreasedΔG and increased Q,diffusive PTs with simultaneously increasedΔG and decreased Q,and displacive PTs with simultaneously increased ΔG and decreased Q.This leads to so-called thermo-kinetic connectivity by integrating the thermo-kinetic correlation and the GS,where,by application in typical PTs,it was clearly shown,a criterion of high ΔG-high GS can be predicted by modulating chemical driving force,negative driving force and kinetic energy barrier for diffusion or nucleation.Following thermo-kinetic connectivity,analogous procedure for dislocation evolution upon PDs was performed,and materials design in terms of the highΔG-high GS criterion was discussed and prospected.

关键词： Thermo-kinetic correlation Negative driving force Generalized stability Thermo-kinetic connectivity

Recent progress on the recycling technology of Li-ion batteries

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Journal of Energy Chemistry 2021年第4期30卷 391-419页

作者： yuqing Wang Ning An Lei Wen Lei Wang Xiaotong Jiang Feng hou Yuxin Yin Ji Liang Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina China Automotive Technology&Research Center Co. LtdTianjin 300300China Tianjin Lishen Battery Joint-Stock Limited Company Tianjin 300384China Institute for Superconducting&Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongInnovation CampusNorth WollongongNSW 2500Australia

Lithium-ion batteries(LIBs)have been widely applied in portable electronic devices and electric vehicles.With the booming of the respective markets,a huge quantity of spent LIBs that typically use either LiFePO_(4) or Li N_(x)Co_(y)Mn_(z)O_(2) cathode materials will be produced in the very near future,imposing significant pressure for the development of suitable disposal/recycling technologies,in terms of both environmental protection and resource reclaiming.In this review,we firstly do a comprehensive summary of the-state-of-art technologies to recycle Li N_(x)Co_(y)Mn_(z)O_(2) and LiFePO_(4)-based LIBs,in the aspects of pretreatment,hydrometallurgical recycling,and direct regeneration of the cathode materials.This closed-loop strategy for cycling cathode materials has been regarded as an ideal approach considering its economic benefit and environmental friendliness.Afterward,as for the exhausted anode materials,we focus on the utilization of exhausted anode materials to obtain other functional materials,such as graphene.Finally,the existing challenges in recycling the LiFePO_(4) and Li N_(x)Co_(y)Mn_(z)O_(2) cathodes and graphite anodes for industrial-scale application are discussed in detail;and the possible strategies for these issues are proposed.We expect this review can provide a roadmap towards better technologies for recycling LIBs,shed light on the future development of novel battery recycling technologies to promote the environmental benignity and economic viability of the battery industry and pave way for the large-scale application of LIBs in industrial fields in the near future.

关键词： Li ion battery Recycling Cathode Anode

Echinacoside Protects Against MPP+-Induced Neuronal Apoptosis via ROS/ATF3/CHOP Pathway Regulation

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Neuroscience Bulletin 2016年第4期32卷 349-362页

作者： Qing Zhao Xiaoyan Yang Dingfang Cai Ling Ye Yuqing Hou Lijun Zhang Jiwei Cheng Yuan Shen Kaizhe Wang Yu Bai Department of Neurology Putuo HospitalShanghai University of Traditional Chinese Medicine Department of Emergency Internal Medicine Putuo HospitalShanghai University of Traditional Chinese Medicine Laboratory of Neurology Institute of Integrative MedicineZhongshan Hospital Fudan University Department of Integrative Medicine Zhongshan HospitalFudan University Center for Translational Neurodegeneration and Regenerative Therapy Shanghai Tenth People’s Hospital Affiliated with Tongji University School of Medicine Department of Immunology Tongji University School of Medicine

Echinacoside （ECH） is protective in a mouse model of Parkinson＇ s disease （PD） induced by 1-methyl-4- phenylpyridinium ion （MPP＋）. To investigate the mechanisms involved, SH-SYSY neuroblastoma ceils were treated with MPP＋ or a combination of MPP＋ and ECH, and the expression of ATF3 （activating transcription factor 3）, CHOP （C/EBP-homologous protein）, SCNA （synuclein alpha）, and GDNF （glial cell line-derived neurotrophic factor） was assessed. The results showed that ECH significantly improved cell survival by inhibiting the generation of MPP＋-induced reactive oxygen species （ROS）. In addition, ECH suppressed the ROS and MPP＋- induced expression of apoptotic genes （ATF3, CHOP, and SCNA）. ECH markedly decreased the MPP＋-induced cas- pase-3 activity in a dose-dependent manner. ATF3- knockdown also decreased the CHOP and cleaved caspase- 3 levels and inhibited the apoptosis induced by MPP＋. Interestingly, ECH partially restored the GDNF expression that was down-regulated by MPP＋. ECH also improved dopaminergic neuron survival during MPP＋ treatment and protected these neurons against the apoptosis induced by MPTP. Taken together, these data suggest that the ROS/ ATF3/CHOP pathway plays a critical role in mechanisms by which ECH protects against MPP＋-induced apoptosis in PD.

关键词： Echinacoside Parkinson＇s disease 1-Methyl-4-phenylpyridinium ion. Reactive oxygen species ATF3 CHOP

Laser direct writing derived robust carbon nitride films with efficient photon-to-electron conversion for multifunctional photoelectrical applications

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Carbon Energy 2022年第6期4卷 1228-1241页

作者： Haotian Tan Wenping Si Wei Peng yuqing Wang Daolan Liu Liqun Wang Chongyun Jiang Lu Di Ji Liang Feng hou Institute of Advanced Ceramics Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationSchool of Materials Science and EngineeringTianjin UniversityTianjinChina Institute for Superconducting&Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongNorth WollongongNew South WalesAustralia Applied Physics Department College of Physics and Materials ScienceTianjin Normal UniversityTianjinChina Institute of Photoelectronic Thin Film Devices and Techology College of Electronic Information and Optical EngineeringNankai UniversityTianjinChina School of Materials Science and Engineering Nankai UniversityTianjinChina

Carbon nitride,an emerging polymeric semiconductor,has attracted attention in research ranging from photocatalysis to photodetection due to its favorable visible light response and high physicochemical stability.For its practical device application,the fabrication of high-quality carbon nitride films on substrates is essential.However,conventional methodologies to achieve high polymerization of carbon nitride are often accompanied by its decomposition,significantly compromising the film quality.Herein,we report an ultrafast fabrication of carbon nitride film by laser direct writing(LDW).The instantaneous high temperature and pressure during LDW can efficiently boost the polymerization of carbon nitride and suppress its decomposition,resulting in high-quality carbon nitride film with excellent mechanical stability with the substrate.Due to the efficient photon-to-electron conversion,it exhibits an outstanding photoelectrochemical water splitting and optoelectronic detection capability,even under strong acid/alkaline conditions.This study thus offers a facile and efficient LDW strategy for the rapid fabrication of carbon nitride film photoelectrodes,demonstrating its great feasibility in multifunctional photoelectrical applications,including but not limited to photoelectrochemical water splitting and optoelectronic detection.

关键词： carbon nitride laser direct writing photodetectors photoelectrochemical water splitting