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Multiwavelets domain singular value features for image texture classification

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Journal of Zhejiang University-science A(Applied Physics & Engineering) 2007年第4期8卷 538-549页

作者： RAMAKRIsHNAN s. sELVAN s. Department of Information Technology PsG College of Technology Coimbatore 641 004India

A new approach based on multiwavelets transformation and singular value decomposition (sVD) is proposed for the classification of image textures. Lower singular values are truncated based on its energy distribution to classify the textures in the presence of additive white Gaussian noise (AWGN). The proposed approach extracts features such as energy, entropy, local homogeneity and max-min ratio from the selected singular values of multiwavelets transformation coefficients of image textures. The classification was carried out using probabilistic neural network (PNN). Performance of the proposed approach was compared with conventional wavelet domain gray level co-occurrence matrix (GLCM) based features, discrete multiwavelets transformation energy based approach, and HMM based approach. Experimental results showed the superiority of the proposed algorithms when compared with existing algorithms.

关键词： Image texture classification Multiwavelets transformation Probabilistic neural network (PNN)

PREPARATION OF POLYETHERsULFONE ULTRAFILTRATION MEMBRANEs FOR MILK CONCENTRATION AND EFFECTs OF ADDITIVEs ON THEIR MORPHOLOGY AND PERFORMANCE

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Chinese Journal of Polymer science 2005年第5期23卷 539-548页

作者： s.s.Madaeni A.Rahimpour Department Of Chemical Engineering Razi University KermanshahIran

Polyethersulfone membranes were prepared from quaternary systems containing N,N-dimethylacetamide （DMAc） as solvent, polyvinylpyrrolidone （PVP） as constant additive and acetic acid, acetone and water as variable additives. Phase inversion via immersion precipitation was employed for manufacturing of membranes. The prepared films were immersed in the mixture of pure water and 2-propanol （30/70 vol%） as the non-solvent. Acetic acid caused an increment in the flux at high polymer concentration （16 wt%） and a decline in the flux at low polymer concentrations （10 wt% and 13 wt%）. Acetone and water as the solvent in the casting solution declined the flux at any polymer concentration tested. The morphology and performance of the prepared membranes were investigated by scanning electron microscopy and separation experiments using milk as the feed.

关键词： Membrane Ultrafiltartion Polyethersulfone Phase inversion Milk.

Field-dependent resistive transitions in YBa_2Cu_3O_(7-δ) thin films:Influence of the pseudogap on vortex dynamics

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Chinese Physics B 2015年第1期24卷 467-473页

作者： s H Naqib R s Islam Department of Physics University of RajshahiRajshahi-6205 Bangladesh

The nature of resistive transition of high-quality crystalline thin films of YBa2Cu3O7-δhas been studied under magnetic fields（H） applied along the c direction over a wide range of doped holes, p, in the Cu O2 planes. The field- and temperature-dependent in-plane resistivity, ρab（T, H）, has been analyzed within the thermally assisted flux-flow（TAFF）formalism. The flux activation energy, U（T, H）, has been extracted from this analysis. The low-T part of the ρab（T, H）data can be described by an activation energy having the functional form of U（T, H） =（1- t）m（H-0/H）β, where t = T /Tc（reduced temperature）, and H0 is a field scale that primarily determines the magnitude of U（T, H）. The temperature exponent, m, shows a systematic variation with p, whereas the field exponent, β, is insensitive to the p values and is close to unity. The H0, on the other hand, changes rapidly as p is varied. U（T, H） is linked to the pinning potential and consequently on the superconducting condensation energy. since the normal state pseudogap directly affects superconducting condensation energy, a clear correspondence between H0 and the PG energy scale, ε g, is found. Possible implications of these results are discussed.

关键词： Y123 superconductors thermally assisted flux-flow model activation energy pseudogap

Operational Tau Approximation for the Fokker-Planck Equation

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Chinese Physics Letters 2012年第4期29卷 141-144页

作者： s.s.Dehcheshmeh s.Karimi Vanani J.s.Hafshejani Department of Mathematics Islamic Azad UniversityFarsan BranchFarsanIran

An extension of the operational Tau method (OTM) is used to solve the Fokker Planck equation arising in many physical *** extension yields an algebraic equivalent representation of the desired problem using arbitrary polynomial basis functions to decrease the size of the *** structure,properties and advantages of the OTM are presented,and some illustrative linear and nonlinear experiments are given to show the capability and efficiency of the proposed algorithm.

关键词： problems Approximation polynomial

Detection of void and metallic inclusion in 2D piezoelectric cantilever beam using impedance measurements

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Frontiers of structural and Civil Engineering 2019年第3期13卷 542-556页

作者： s.sAMANTA s.s.s.NANTHAKUMAR R.K.ANNABATTULA X.ZHUANG Institute of Continuum Mechanics Leibniz University Hannover30167 HannoverGermany Indian Institute of Technology Madras Chennai 600036India College of Civil Engineering Tongji UniversityShanghai 200092China

The aim of current work is to improve the existing inverse methodology of void-detection based on a target impedance curve,leading to quick-prediction of the parameters of single circular *** this work,mode-shape dependent shifting phenomenon of peaks of impedance curve with change in void location has been analyzed.A number of initial guesses followed by an iterative optimization algorithm based on univariate method has been used to solve the *** each iteration starting from each initial guess,the difference between the computationally obtained impedance curve and the target impedance curve has been *** methodology has been extended to detect single circular metallic inclusion in 2D piezoelectric cantilever beam.A good accuracy level was observed for detection of flaw radius and flaw-location along beam-length,but not the precise location along beam-width.

关键词： piezoelectricity impedance curve mode shapes inverse problem flaw detection curve shifting

Analytical investigation of steady three-dimensional problem of condensation film on inclined rotating disk by Akbari-Ganji's method

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Propulsion and Power Research 2017年第4期6卷 277-284页

作者： s.Berkan s.R.Hoseini D.D.Ganji Department of Mechanical Engineering Babol University of TechnologyBabolIran

The steady three-dimensional problem of condensation film on an inclined rotating disk is illustrated in this study. The governing non-linear partial differential equations are reduced to the nonlinear ordinary differential equations system by similarity transform. The analytical solution applied to solve this system is the Akbari-Ganji's method (AGM). The velocity and temperature profiles are shown and the influence of Prandtl number and rotation ratio on the flow field, heat transfer and the Nusselt number are discussed in detail. The validity of our solutions is verified by the numerical results.

关键词： Rotating disk Condensation film Heat and mass transfer Film thickness

Pomegranate peel extract lessens histopathologic changes and restores antioxidant homeostasis in the hippocampus of rats with aluminium chloride-induced Alzheimer’s disease

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Asian Pacific Journal of Tropical Medicine 2020年第10期13卷 456-463页

作者： steve Harakeh Wafaa s.Ramadan Mohammed s.Al Muhayawi soad Al Jaouni shaker Mousa Khalid Rehman Hakeem special Infectious Agent Unit King Fahd Medical Research CenterKing Abdulaziz UniversityKingdom of Saudi Arabia Department of Anatomy Faculty of MedicineKing Abdulaziz UniversityKingdom of Saudi Arabia Department of Anatomy Faculty of MedicineAin Shams UniversityCairoEgypt Department of Medical Microbiology/Parasitology and Molecular Microbiology Laboratory KAUHKing Abdulaziz UniversityKingdom of Saudi Arabia Department of Hematology/Pediatric Oncology King Abdulaziz University Hospital(KAUH)Faculty of MedicineKing Abdulaziz UniversityKingdom of Saudi Arabia Yousef Abdul Latif Jameel scientific Chair of Prophetic Medicine Application Faculty of MedicineKing Abdulaziz UniversityKingdom of Saudi Arabia Pharmaceutical Research Institute Albany College of Pharmacy and Health SciencesRensselaerNYUSA Department of Biological sciences Faculty of SciencesKing Abdulaziz UniversityJeddahSaudi Arabia

Objective:To investigate the neuroprotective efficacy of pomegranate and ellagic acid on the histopathological changes in the hippocampus of an aluminium chloride(AlCl3)induced rat model of Alzheimer’s ***:sprague Da... 详细信息

Objective:To investigate the neuroprotective efficacy of pomegranate and ellagic acid on the histopathological changes in the hippocampus of an aluminium chloride(AlClsub>3)induced rat model of Alzheimer’s ***:sprague Dawley rats were divided into 4 groups(n=10each):GroupⅠ:serving as negative control;GroupⅡ,Alzheimer model,induced by administration of 17 mg/kg bw AlCl3;GroupⅢ,administered the same dose of AlCl3 with 50 mg/kg of pomegranate peel extract and GroupⅣ:administered ellagic acid(50 mg/kg)in addition to the same dose of *** medication given to all groups continued for 28 *** were given the compounds by gastric *** arm maze test,hippocampus antioxidant markers,histopathology of the dentate gyrus,and CA3 of the hippocampus were ***:Rats treated with pomegranate peel extract exposed to radial arm maze test showed less number of errors and reduced time needed to reach the *** was an increase in the levels of glutathione,catalase,and total antioxidant capacity and decreased lipid peroxidation *** features in dentate gyrus and CA3 as apoptosis and chromatolysis of pyramidal cells and granular layer,respectively,were *** characteristic neurofibrillary tangles and senile plaques were *** with ellagic acid ameliorated the pathological results but to a statistically lower ***:Pomegranate peel extract alleviates memory deficit and restores antioxidant homeostasis following degenerative changes in the hippocampus induced by aluminium chloride in rats.

关键词： Pomegranate Peel extract Ellagic acid Antioxidants Hippocampus Behavioural test

Bilateral scleromalacia perforans and peripheral corneal thinning in Wegener's granulomatosis

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International Journal of Ophthalmology(English edition) 2011年第4期4卷 439-442页

作者： s C Reddy I Tajunisah T Rohana Department of Ophthalmology Faculty of Medicine University of Malaya

A rare case of bilateral scleromalacia perforans, bilateral peripheral corneal thinning (contact lens cornea) and unilateral orbital inflammatory disease in a 50 year old female patient with an indolent form Wegener's granulomatosis(WG) involving lungs and sinuses is reported. The patient survived for 12 years after the initial diagnosis of systemic disease. There was perforation of left globe following trauma and no perforation of the right globe till the last follow up of the patient.

关键词： Wegener's granulomatosis scleromalacia perforans peripheral thinning of cornea proptosis

Hydroxyapatite-containing PEO-coating design for biodegradable Mg-0.8Ca alloy: Formation and corrosion behaviour

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Journal of Magnesium and Alloys 2023年第12期11卷 4468-4484页

作者： A.s.Gnedenkov s.L.sinebryukhov V.s.Filonina s.V.Gnedenkov Institute of Chemistry of FEB RAs 159 Pr.100-letiya VladivostokaVladivostok690022Russian Federation

In this study, the biocompatible protective coating was formed using plasma electrolytic oxidation(PEO) on bioresorbable Mg-0.8Ca alloy. The composition of the formed coating was studied using XRD, sEM-EDX analysis, and micro-Raman spectroscopy. The uniform distribution of hydroxyapatite over the thickness of protective PEO-layer was established. Using traditional(EIs, PDP, OCP) and local scanning electrochemical methods(sVET, sIET with H^(+)-selective microelectrode), the level of protective properties of PEO-layer in a biological environment(mammalian cell culture medium, MEM) was determined. It was established that modification of Mg-0.8Ca alloy surface by PEO contributes to a significant increase in the corrosion resistance of the surface layer, making it possible to control the process of material‘s biodegradation. The maximum local electrochemical activity was recorded after 72 h of testing, while for the uncoated sample,intense corrosion degradation was recorded in the first 12 min of exposure to the cell culture medium. Formation of the PEO-coating results in a twofold decrease in the corrosion current density(2.8·10^(-6)A cm^(-2)) and an increase in the impedance modulus measured at a low frequency(1.7·10^(4)Ω cm^(2)) in comparison with the uncoated material(9.5·10^(-6)A cm^(-2);8.1·10^(3)Ω cm^(2)). The mechanism of material bioresorption was established and a model for biodegradation process of Mg-0.8Ca alloy with hydroxyapatite-containing PEO-coating in MEM was proposed. Analysis of these results and comparing with others obtained by various scientific groups indicate the prospects for application of biocompatible PEO-coating on Mg-Ca alloy in implant surgery.

关键词： Magnesium-calcium alloy Biodegradation Implant surgery Plasma electrolytic oxidation Electrochemistry Minimum essential medium Hydroxyapatite