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evaluation of renal function using diffusion weighted imaging and diffusion tensor imaging in type 2

Xiaoyan Chen,Wenxia Xiao,Xinchun Li,Jianxun He,Xiaochun Huang,Yuyu Tan

Frontiers of Medicine 2014, Volume 8, Issue 4,   Pages 471-476 doi: 10.1007/s11684-014-0365-8

Abstract:

This work aims to estimate the value of diffusion weighted imaging (DWI) and diffusion tensor imagingDWI and DTI scans were performed on bilateral kidney using SE single-shot EPI, and apparent diffusion

Keywords： type 2 diabetes mellitus     microalbuminuria     diffusion weighted imaging     diffusion tensor imaging     early-stage    

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Altered white matter microarchitecture in Parkinson’s disease: a voxel-based meta-analysis of diffusiontensor imaging studies

Xueling Suo, Du Lei, Wenbin Li, Lei Li, Jing Dai, Song Wang, Nannan Li, Lan Cheng, Rong Peng, Graham J Kemp, Qiyong Gong

Frontiers of Medicine 2021, Volume 15, Issue 1,   Pages 125-138 doi: 10.1007/s11684-019-0725-5

Abstract: Web-based publication databases were searched to conduct a meta-analysis of whole-brain diffusion tensorimaging studies comparing PD with healthy controls (HC) using the anisotropic effect size–signed differentialheterogeneity with respect to medication status, disease stage, analysis methods, and the number of diffusionmeta-analyses of medicated patients, early stage patients, voxel-based analysis, and acquisition with ＜30 diffusionMedication status, analysis approaches, and the number of diffusion directions have an important impact

Keywords： Parkinson’s disease     diffusion tensor imaging     fractional anisotropy     meta-analysis     anisotropic effect size–signed    

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TPE-H2MWD: an exact thumbnail preserving encryption scheme with hidden Markov model and weighted diffusion Research Article

Xiuli CHAI, Xiuhui CHEN, Yakun MA, Fang ZUO, Zhihua GAN, Yushu ZHANG,chaixiuli@henu.edu.cn,2923105987@qq.com,1060734169@qq.com,zuofang@henu.edu.cn,gzh@henu.edu.cn,yushu@nuaa.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 8,   Pages 1169-1180 doi: 10.1631/FITEE.2200498

Abstract: With the substantial increase in image transmission, the demand for image security is increasing. Noise-like images can be obtained by conventional encryption schemes, and although the security of the images can be guaranteed, the noise-like images cannot be directly previewed and retrieved. Based on the rank-then-encipher method, some researchers have designed a three-pixel exact thumbnail preserving encryption (TPE2) scheme, which can be applied to balance the security and availability of images, but this scheme has low encryption efficiency. In this paper, we introduce an efficient exact thumbnail preserving encryption scheme. First, blocking and bit-plane decomposition operations are performed on the plaintext image. The zigzag scrambling model is used to change the bit positions in the lower four bit planes. Subsequently, an operation is devised to permute the higher four bit planes, which is an extended application of the . Finally, according to the difference in bit weights in each bit plane, a bit-level rule is established to generate an encrypted image and still maintain the same sum of pixels within the block. Simulation results show that the proposed scheme improves the encryption efficiency and can guarantee the availability of images while protecting their privacy.

Keywords： Hidden Markov model     Weighted diffusion     Balance between usability and privacy     Image encryption    

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A comprehensive assessment on the durability of gas diffusion electrode materials in PEM fuel cell stack

Arunkumar JAYAKUMAR

Frontiers in Energy 2019, Volume 13, Issue 2,   Pages 325-338 doi: 10.1007/s11708-019-0618-y

Abstract: The crucial and expensive component involved in it is the gas diffusion electrode (GDE) and its degradation

Keywords： PEM fuel cell     gas diffusion electrode(GDE)     gas diffusion layer(GDL)     membrane electrode assembly     durability    

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radiation fraction induced by interaction burning of tri-symmetric propane fires in open space based on weighted

Jie JI, Junrui DUAN, Huaxian WAN

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 1017-1026 doi: 10.1007/s11708-020-0716-x

Abstract: The interaction of multiple fires may lead to a higher flame height and more intense radiation flux than a single fire, which increases the possibility of flame spread and risks to the surroundings. Experiments were conducted using three burners with identical heat release rates (HRRs) and propane as the fuel at various spacings. The results show that flames change from non-merging to merging as the spacing decreases, which result in a complex evolution of flame height and merging point height. To facilitate the analysis, a novel merging criterion based on the dimensionless spacing / was proposed. For non-merging flames ( / >0.368), the flame height is almost identical to a single fire; for merging flames ( / ≤0.368), based on the relationship between thermal buoyancy and thrust (the pressure difference between the inside and outside of the flame), a quantitative analysis of the flame height, merging point height, and air entrainment was formed, and the calculated merging flame heights show a good agreement with the measured experimental values. Moreover, the multi-point source model was further improved, and radiation fraction of propane was calculated. The data obtained in this study would play an important role in calculating the external radiation of propane fire.

Keywords： flame interaction     air entrainment     flame height     multi-point source model     thermal radiation    

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Coupled diffusion of chloride and other ions in saturated concrete

Nattapong DAMRONGWIRIYANUPAP, Linyuan LI, Yunping XI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 267-277 doi: 10.1007/s11709-011-0112-z

Abstract: The diffusion of chloride ions is associated and strongly affected by other ions in the pore solutionstructures was mathematically characterized by the Nernst-Planck equation which considered not only diffusionThe material models of chloride binding capacity and chloride diffusion coefficient were incorporated

Keywords： diffusion     chloride     concrete     Nernst-Planck equation     durability    

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Experimental study of humid air reverse diffusion combustion in a turbulent flow field

GE Bing, ZANG Shusheng, GU Xin

Frontiers in Energy 2007, Volume 1, Issue 4,   Pages 428-434 doi: 10.1007/s11708-007-0062-6

Abstract: Experiments were performed to investigate the differences between the propane/air turbulent diffusionreactive flows past bluff-body and the propane/humid air turbulent diffusion reactive flows in the same

Keywords： propane/humid     propane/air turbulent     bluff-body     turbulent diffusion    

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Preparation of a Pb loaded gas diffusion electrode and its application to CO

Ang LI, Hua WANG, Jinyu HAN, Li LIU

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4,   Pages 381-388 doi: 10.1007/s11705-012-1216-2

Abstract: A Pb loaded gas diffusion electrode was fabricated and used for the electroreduction of CO to formicThe preparation conditions of the gas diffusion electrode were optimized by adjusting the amounts ofpolytetrafluoroethylene (PTFE) in the gas diffusion layer and acetylene black in the catalytic layer.The electrochemical performance of the as-prepared gas diffusion electrode was studied by chronoamperometryThe optimized gas diffusion electrode showed good catalytic performance for the electroreduction of CO

Keywords： electroreduction     carbon dioxide     lead catalyst     gas diffusion electrode     formic acid    

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Magnetohydrodynamic slip flow and diffusion of a reactive solute past a permeable flat plate with suction

Krishnendu BHATTACHARYYA, G. C. LAYEK

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 4,   Pages 471-476 doi: 10.1007/s11705-011-1130-z

Abstract: The magnetohydrodynamic (MHD) boundary layer slip flow and solute transfer over a porous plate in the presence of a chemical reaction are investigated. The governing equations were transformed into self-similar ordinary differential equations by adopting the similarity transformation technique. Then the numerical solutions are obtained by a shooting technique using the fourth order Runge-Kutta method. The study reveals that due to the increase in the boundary slip, the concentration decreases and the velocity increases. On the other hand, with an increase in the magnetic field and mass suction, both boundary layer thicknesses decreased. As the Schmidt number and the reaction rate parameter increases, the concentration decreases and the mass transfer increases.

Keywords： slip flow     MHD boundary layer     reactive solute diffusion     flat plate     suction/injection    

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Molecular diffusion in ternary poly(vinyl alcohol) solutions

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 1003-1016 doi: 10.1007/s11705-021-2121-3

Abstract: The diffusion kinetics of a molecular probe—rhodamine B—in ternary aqueous solutions containing poly(We show that the diffusion characteristics of rhodamine B in such complex systems is determined by aThe presence of glycerol has no noticeable impact on rhodamine B diffusion at low concentration, butsignificantly slows down the diffusion of rhodamine B above 3.9% (w/v) due to a dominating steric inhibitionFurthermore, introducing surfactants (cationic/nonionic/anionic) to the system results in a decreased diffusion

Keywords： fluorescence correlation spectroscopy     poly(vinyl alcohol)     anomalous diffusion     crowding effects     dynamic    

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Reaction kinetics and internal diffusion of Zhundong char gasification with CO

Yun Liu, Jiangyuan Qu, Xuehui Wu, Kai Zhang, Yuan Zhang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 373-383 doi: 10.1007/s11705-020-1949-2

Abstract: The effect of internal diffusion on char gasification with CO in the temperature range from 1123 K toThe results revealed that the effect of internal diffusion on the initial reaction rate was more significantThus, temperature zones corresponding to chemical reaction and diffusion control were identified.Moreover, the calculated effectiveness factor provided a quantitative estimation of internal diffusion

Keywords： coal char     CO2 gasification     internal diffusion     pore evolution    

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Chloride diffusion in concrete with carbonated recycled coarse aggregates under biaxial compression

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 637-648 doi: 10.1007/s11709-023-0902-0

Abstract: In this study, the chloride ion diffusion and deformation properties of recycled concrete after carbonizationthe performance of the recycled aggregates and reduces their porosity, thereby reducing the chloride diffusion

Keywords： recycled concrete     carbonated recycled coarse aggregate     biaxial compression     chloride diffusion     stress    

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Fuel variability effect on flickering frequency of diffusion flames

Jizhao LI, Yang ZHANG

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 134-140 doi: 10.1007/s11708-009-0034-9

Abstract: The intent of this study is to investigate the fuel variability on the flickering frequency of diffusion

Keywords： fuel variability     flickering frequency     diffusion flames     dynamics of combustion    

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Label fusion for segmentation via patch based on local weighted voting Article

Kai ZHU, Gang LIU, Long ZHAO, Wan ZHANG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5,   Pages 680-688 doi: 10.1631/FITEE.1500457

Abstract: Label fusion is a powerful image segmentation strategy that is becoming increasingly popular in medical imagingIn this paper we propose a novel patch-based segmentation method combining a local weighted voting strategyWe first adopt intensity prior and label prior as two key metrics when implementing the local weightedwe compare the results with those of other methods, including joint fusion, majority voting, local weighted

Keywords： Label fusion     Local weighted voting     Patch-based     Background analysis    

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Transient process of methane-oxygen diffusion flame-street establishment in a microchannel

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 988-999 doi: 10.1007/s11708-021-0755-y

Abstract: “Flame-street” is an interesting diffusion flame behavior in which a series of flame-segments is separatelyIn the present paper, the dynamic formation process of a methane-oxygen diffusion flame-street structureflame shape/type change from a tribrachial structure in its fast-propagating phase to a long, trailing diffusionMoreover, chemical insights for the premixed and diffusion branches of the leading flame were also provided

Keywords： micro-combustion     flame-street     diffusion flame     mixing layer     flame propagation speed    

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Title Author Date Type Operation

evaluation of renal function using diffusion weighted imaging and diffusion tensor imaging in type 2

Xiaoyan Chen,Wenxia Xiao,Xinchun Li,Jianxun He,Xiaochun Huang,Yuyu Tan

Journal Article

Altered white matter microarchitecture in Parkinson’s disease: a voxel-based meta-analysis of diffusiontensor imaging studies

Xueling Suo, Du Lei, Wenbin Li, Lei Li, Jing Dai, Song Wang, Nannan Li, Lan Cheng, Rong Peng, Graham J Kemp, Qiyong Gong

Journal Article

TPE-H2MWD: an exact thumbnail preserving encryption scheme with hidden Markov model and weighted diffusion

Xiuli CHAI, Xiuhui CHEN, Yakun MA, Fang ZUO, Zhihua GAN, Yushu ZHANG,chaixiuli@henu.edu.cn,2923105987@qq.com,1060734169@qq.com,zuofang@henu.edu.cn,gzh@henu.edu.cn,yushu@nuaa.edu.cn

Journal Article

A comprehensive assessment on the durability of gas diffusion electrode materials in PEM fuel cell stack

Arunkumar JAYAKUMAR

Journal Article

radiation fraction induced by interaction burning of tri-symmetric propane fires in open space based on weighted

Jie JI, Junrui DUAN, Huaxian WAN

Journal Article

Coupled diffusion of chloride and other ions in saturated concrete

Nattapong DAMRONGWIRIYANUPAP, Linyuan LI, Yunping XI

Journal Article

Experimental study of humid air reverse diffusion combustion in a turbulent flow field

GE Bing, ZANG Shusheng, GU Xin

Journal Article

Preparation of a Pb loaded gas diffusion electrode and its application to CO

Ang LI, Hua WANG, Jinyu HAN, Li LIU

Journal Article

Magnetohydrodynamic slip flow and diffusion of a reactive solute past a permeable flat plate with suction

Krishnendu BHATTACHARYYA, G. C. LAYEK

Journal Article

Molecular diffusion in ternary poly(vinyl alcohol) solutions

Journal Article

Reaction kinetics and internal diffusion of Zhundong char gasification with CO

Yun Liu, Jiangyuan Qu, Xuehui Wu, Kai Zhang, Yuan Zhang

Journal Article

Chloride diffusion in concrete with carbonated recycled coarse aggregates under biaxial compression

Journal Article

Fuel variability effect on flickering frequency of diffusion flames

Jizhao LI, Yang ZHANG

Journal Article

Label fusion for segmentation via patch based on local weighted voting

Kai ZHU, Gang LIU, Long ZHAO, Wan ZHANG

Journal Article

Transient process of methane-oxygen diffusion flame-street establishment in a microchannel

Journal Article