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Comparison of various image fusion methods for impervious surface classification from VNREDSat-1
Hung V. Luu,Manh V. Pham,Chuc D. Man,Hung Q. Bui,Thanh T.N. Nguyen 국제문화기술진흥원 2016 International Journal of Advanced Culture Technolo Vol.4 No.2
Impervious surfaces are important indicators for urban development monitoring. Accurate mapping of urban impervious surfaces with observational satellites, such as VNREDSat-1, remains challenging due to the spectral diversity not captured by an individual PAN image. In this article, five multi-resolution image fusion techniques were compared for the task of classifting urban impervious surfaces. The result shows that for VNREDSat-1 dataset, UNB and Wavelet tranformation methods are the best techniques in reserving spatial and spectral information of original MS image, respectively. However, the UNB technique gives the best results when it comes to impervious surface classification, especially in the case of shadow areas included in non-impervious surface group.
Comparison of various image fusion methods for impervious surface classification from VNREDSat-1
Luu, Hung V.,Pham, Manh V.,Man, Chuc D.,Bui, Hung Q.,Nguyen, Thanh T.N. The International Promotion Agency of Culture Tech 2016 International Journal of Advanced Culture Technolo Vol.4 No.2
Impervious surfaces are important indicators for urban development monitoring. Accurate mapping of urban impervious surfaces with observational satellites, such as VNREDSat-1, remains challenging due to the spectral diversity not captured by an individual PAN image. In this article, five multi-resolution image fusion techniques were compared for the task of classifting urban impervious surfaces. The result shows that for VNREDSat-1 dataset, UNB and Wavelet tranformation methods are the best techniques in reserving spatial and spectral information of original MS image, respectively. However, the UNB technique gives the best results when it comes to impervious surface classification, especially in the case of shadow areas included in non-impervious surface group.
Hung, V.,Zou, P.,Rhee, H.W.,Udeshi, Namrata D.,Cracan, V.,Svinkina, T.,Carr, Steven A.,Mootha, Vamsi K.,Ting, Alice Y. Cell Press 2014 Molecular cell Vol.55 No.2
Obtaining complete protein inventories for subcellular regions is a challenge that often limits our understanding of cellular function, especially for regions that are impossible to purify and are therefore inaccessible to traditional proteomic analysis. We recently developed a method to map proteomes in living cells with an engineered peroxidase (APEX) that bypasses the need for organellar purification when applied to membrane-bound compartments; however, it was insufficiently specific when applied to unbounded regions that allow APEX-generated radicals to escape. Here, we combine APEX technology with a SILAC-based ratiometric tagging strategy to substantially reduce unwanted background and achieve nanometer spatial resolution. This is applied to map the proteome of the mitochondrial intermembrane space (IMS), which can freely exchange small molecules with the cytosol. Our IMS proteome of 127 proteins has >94% specificity and includes nine newly discovered mitochondrial proteins. This approach will enable scientists to map proteomes of cellular regions that were previously inaccessible.
Hunge, Y.M.,Yadav, A.A.,Mahadik, M.A.,Mathe, V.L.,Bhosale, C.H. Elsevier 2018 Journal of the Taiwan Institute of Chemical Engine Vol.85 No.-
<P><B>Abstract</B></P> <P>In present article, WO<SUB>3</SUB> thin films have been successfully synthesized by chemical spray pyrolysis approach. The effect of spraying quantity of solution onto the photoelectrochemical (PEC), structural, morphological, and optical properties has been studied. Film prepared at 40 ml solution quantity shows the excellent photoelectrochemical performance (<I>I</I> <SUB>sc</SUB> <SUB> </SUB>= 0.69 mA/cm<SUP>2</SUP> and <I>V</I> <SUB>oc</SUB> = 0.64 V) in 0.05 M concentrated H<SUB>2</SUB>SO<SUB>4</SUB> electrolyte. X-ray diffraction studies reveal that the synthesized WO<SUB>3</SUB> thin films are polycrystalline with monoclinic crystal structure. The chief vibrational modes of the WO<SUB>3</SUB> sample, located at 712.64 and 804.28 cm<SUP>−1</SUP> corresponding to the stretching and the bending of OWO bond respectively and are consistent with a monoclinic structure. The estimated band gap energy of WO<SUB>3</SUB> thin films varies from 2.37 to 2.45 eV with respect to quantities of spraying solution and it exhibits absorption in visible region. Film shows a maximum specific surface area of 31.63 m<SUP>2</SUP>/g. Photoelectrocatalytic degradation of brilliant blue dye in aqueous solutions is studied. The end result shows that the degradation percentage of brilliant blue using WO<SUB>3</SUB> photoelectrode has reached 92% under visible light illumination after 240 min. The enhancement in photoelectrocatalytic activity of optimized 40 ml WO<SUB>3</SUB> sample is mainly due to the suppressed the recombination rate of photogenerated electron–hole pairs. This study provides an effective WO<SUB>3</SUB> photoelectrode for removing of organic pollutants present in the water.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Monoclinic WO<SUB>3</SUB> homogeneous thin films prepared by the simple, cost-effective, eco-friendly spray pyrolysis approach. </LI> <LI> Photoelectrode with 710 nm thickness display superior photocatalytic degradation of brilliant blue dye. </LI> <LI> Degradation rate constant was 0.2238 cm<SUP>3</SUP>/s for BB under visible-light illumination. </LI> <LI> Decreased COD values from 76 to 16 mg/l confirm the mineralization of the BB dye molecule. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Hunge, Y.M.,Yadav, A.A.,Mahadik, M.A.,Bulakhe, R.N.,Shim, J.J.,Mathe, V.L.,Bhosale, C.H. Elsevier 2018 Optical materials Vol.76 No.-
<P><B>Abstract</B></P> <P>The need to utilize TiO<SUB>2</SUB> based metal oxide hetero nanostructures for the degradation of environmental pollutants like Rhodamine B and reactive red 152 from the wastewater using stratified WO<SUB>3</SUB>/TiO<SUB>2</SUB> catalyst under sunlight illumination. WO<SUB>3</SUB>, TiO<SUB>2</SUB> and stratified WO<SUB>3</SUB>/TiO<SUB>2</SUB> catalysts were prepared by a spray pyrolysis method. It was found that the stratified WO<SUB>3</SUB>/TiO<SUB>2</SUB> heterostructure has high crystallinity, no mixed phase formation occurs, strong optical absorption in the visible region of the solar spectrum, and large surface area. The photocatalytic activity was tested for degradation of Rhodamine B (Rh B) and reactive red 152 in an aqueous medium. TiO<SUB>2</SUB> layer in stratified WO<SUB>3</SUB>/TiO<SUB>2</SUB> catalyst helps to extend its absorption spectrum in the solar light region. Rh B and Reactive red 152is eliminated up to 98 and 94% within the 30 and 40 min respectively at optimum experimental condition by stratified WO<SUB>3</SUB>/TiO<SUB>2</SUB>. Moreover, stratified WO<SUB>3</SUB>/TiO<SUB>2</SUB> photoelectrode has good stability and reusability than individual TiO<SUB>2</SUB> and WO<SUB>3</SUB> thin film in the degradation of Rh B and reactive red 152. The photoelectrocatalytic experimental results indicate that stratified WO<SUB>3</SUB>/TiO<SUB>2</SUB> photoelectrode is a promising material for dye removal.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Enhanced photoelectrocatalytic activity of sprayed deposited stratified WO<SUB>3</SUB>/TiO<SUB>2</SUB> thin films. </LI> <LI> Photoelectrocatalytic degradation of rhodamine B and reactive red 152 dye. </LI> <LI> Reaction kinetics and degradation of pollutants by COD measurement. </LI> </UL> </P>
Hung, T.Q.,Oh, S.J.,Tu, B.D.,Duc, N.H.,Phong, L.V.,AnandaKumar, S.,Jeong, J.-R.,Kim, C.G. IEEE 2009 IEEE transactions on magnetics Vol.45 No.6
<P>Planar Hall effect (PHE) sensors with the junction size of 50 mum times 50 mum were fabricated successfully by using spin-valve thin films Ta(5)/NiFe(x) /Cu(1.2)/NiFe(2)/IrMn(15)/Ta(5) (nm) with x = 4, 8, 10, 12, 16. The magnetic field sensitivity of the PHE sensors increases with increasing thickness of ferromagnetic (FM) free layer. The sensitivity of about 95.5 m Omega/(kA/m) can be obtained when the thickness of the FM-free layer increases up to 16 nm. The enhancement of sensitivity is explained by the shunt current from other layers. The PHE profiles are well described in terms of the Stoner-Wohlfarth energy model. The detection of magnetic micro-beads label Dynabeads<SUP>reg</SUP> M-280 is demonstrated and the results revealed that the sensor is feasible for high-resolution biosensor applications.</P>
Connection stiffness reduction analysis in steel bridge via deep CNN and modal experimental data
Hung V. Dang,Mohsin Raza,H. Tran-Ngoc,T. Bui-Tien,Huan X. Nguyen 국제구조공학회 2021 Structural Engineering and Mechanics, An Int'l Jou Vol.77 No.4
This study devises a novel approach, namely quadruple 1D convolutional neural network, for detecting connection stiffness reduction in steel truss bridge structure using experimental and numerical modal data. The method is developed based on expertise in two domains: firstly, in Structural Health Monitoring, the mode shapes and its high-order derivatives, including second, third, and fourth derivatives, are accurate indicators in assessing damages. Secondly, in the Machine Learning literature, the deep convolutional neural networks are able to extract relevant features from input data, then perform classification tasks with high accuracy and reduced time complexity. The efficacy and effectiveness of the present method are supported through an extensive case study with the railway Nam O bridge. It delivers highly accurate results in assessing damage localization and damage severity for single as well as multiple damage scenarios. In addition, the robustness of this method is tested with the presence of white noise reflecting unavoidable uncertainties in signal processing and modeling in reality. The proposed approach is able to provide stable results with data corrupted by noise up to 10%.