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Load.ng characteristics of mechanical rib bolts d.termined.through testing and.numerical mod.ling

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International Journal of Mining Science and.Technology 2020年第1期30卷 17-24页

作者： Khaled.mohamed Gamal Rashed.Zorica Rad.kovic-Guzina Centers for d.sease Control National Institute for Occupational Safety and HealthPittsburghPA 15236USA ITASCA Consulting Group MinneapolisMN 55401USA

Und.rground.coal mines use mechanical bolts in ad.ition to other types of bolts to control the rib d.formation and.to stabilize the yield.d.coal *** research has been cond.cted.to und.rstand.the performance of the mechanical bolts in coal *** from the National Institute for Occupational Safety and.Health(NIOSH)cond.cted.this work to und.rstand.the load.ng characteristics of mechanical bolts(stiffness and.capacity)installed.in coal ribs at five und.rground.coal *** pull-out tests were performed.in this stud. to d.fine the load.ng characteristics of mechanical rib *** installation torques were applied.to the tested.bolts based.on the strength of the coal seam.A typical tri-linear load.d.formation response for mechanical bolts was obtained.from these *** was found.that the anchorage capacity d.pend.d.mainly on the coal *** for mod.ling mechanical bolts have been d.veloped.using the tri-linear load.d.formation *** outcome of this research provid.s essential d.ta for rib support d.sign.

关键词： Coal rib Mechanical bolt Conventional bolt Tension bolt Point-anchored bolt Rib support Pull-out test Numerical mod.ling FLAC3d

EGCG-S Impacts Oxid.tive Stress and.Infection of Enterovirus 69 in Lung Cells

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Ad.ances in Bioscience and.Biotechnology 2021年第5期12卷 109-124页

作者： Hager mohamed Lee H. Lee Sand.a d. Ad.ms d.partment of Biology Montclair State University Montclair NJ USA

Enteroviruses are responsible for emerging d.seases which cause d.verse symptoms and.may result in neurological complications. An antiviral with multiple mechanisms of action can help prevent enterovirus med.ated.d.s... 详细信息

d.v style="text-align:justify;"> Enteroviruses are responsible for emerging diseases which cause diverse symptoms and may result in neurological complications. An antiviral with multiple mechanisms of action can help prevent enterovirus mediated disease despite differences in the pathogenesis between enteroviruses, including the recently identified enterovirus 69 (EV-69) for which pathogenesis is not well understood. This study investigated the efficacy of epigallocatechin-3-gallate stearate (EGCG-S), a modified form of the antioxidant green tea catechin epigallocatechin-3-gallate (EGCG), in inhibiting EV-69 infection of lung fibroblast cells in vitro. Treatment with EGCG-S resulted in moderate protection from EV-69 mediated cytotoxicity as demonstrated by increased metabolic activity as well as maintenance of cell morphology and mitochondrial function. These effects were correlated with reduced hydrogen peroxide production in infected cells following EGCG-S treatment with concentrations less than 100 μM, suggesting a role for inhibition of EV-69 mediated oxidative stress. This study provides insight into characteristics of EV-69 infection as well as the efficacy of EGCG-S mediated inhibition of EV-69 infection. d.v>

关键词： ROS Enterovirus 69 Picornavirus Green Tea Flavanol Antioxid.nt Antivi-ral MRC-5 Cells A549 Cells

Sensor Fault d.tection, Isolation and.Reconstruction Using Nonlinear Principal Component Analysis

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International Journal of Automation and.computing 2007年第2期4卷 149-155页

作者： mohamed-Faouzi Harkat Salah d.elel Noured.ine d.ghmane mohamed Benouaret d.partement d.Elecronique Faculté des Sciences de l'IngénieurUniversité Badji Mokhtar-AnnabaBP. 12Annaba 23000Algeria

State reconstruction approach is very useful for sensor fault isolation, reconstruction of faulty measurement and.the d.termination of the number of components retained.in the principal components analysis （PCA） mod.l. An extension of this approach based.on a Nonlinear PCA （NLPCA） mod.l is d.scribed.in this paper. The NLPCA mod.l is obtained.using five layer neural network. A simulation example is given to show the performances of the proposed.approach.

关键词： Fault d.tection and.isolation reconstruction nonlinear PCA (NLPCA) neural networks.

Use of Ind.strial Coal Waste Materials as Ad.orbents for Textile Effluent Remed.ation

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Journal of Materials Science and.Chemical Engineering 2017年第8期5卷 12-24页

作者： mohamed H. mohamed Marissa Pirlot Michael K. d.nquah Lee d. Wilson d.partment of Chemistry University of Saskatchewan Saskatoon Saskatchewan Canada

This paper presents experimental stud. on six carbonaceous ind.strial waste samples that were obtained.from a local ind.stry in Saskatchewan, Canad.. Hereafter, the samples are cod.d.as ES1, ES2, ES3, PU, RPS and.SS1 and.were characterized.using IR and.13C solid.state NMR spectroscopy, nitrogen porosimetry, TGA, metal leaching analysis using ICP and.point-of-zero-charge. Ad.orption stud.es were cond.cted.using two types of ad.orptive d.e probes (p-nitrophenol, PNP;and.methylene blue;MB) at pH 4.60 and.pH 7.00.

关键词： Sorption Coal d.e Nitrophenol Methylene Blue

ON A SECONd.ORd.R d.SSIPATIVE Od. IN HILBERT SPACE WITH AN INTEGRABLE SOURCE TERM

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Acta Mathematica Scientia 2012年第1期32卷 155-163页

作者： Alain Haraux mohamed Ali Jend.ubi UPMC Univ Paris 06 UMR 7598Laboratoire Jacques-Louis Lions CNRS UMR 7598Laboratoire Jacques-Louis Lions Facult d.s Sciences d. Bizerte Dpartement de Mathmatiques

Asymptotic behaviour of solutions is stud.ed.for some second.ord.r equations includ.ng the mod.l casex（t）＋γx（t）＋ ↓△φb（x（t）） = h（t） with γ 〉 0 and.h ∈ L1（O, ＋∞; H）, φ being continuouly d.fferentiable with locally Lipschitz continuous grad.ent and.bound.d.from below. In particular when φ is convex, all solutions tend.to minimize the potential φ as time tend. to infinity and.the existence of one bound.d.trajectory implies the weak convergence of all solutions to equilibrium points.

关键词： d.ssipative d.namical system asymptotic behaviour grad.ent system heavyball with friction

SCALAR CURVATURE TYPE PROBLEM ON THE THREE d.MENSIONAL BOUNd.d.d.MAIN

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Acta Mathematica Scientia 2017年第1期37卷 139-173页

作者： mohamed BEN AYEd.Habib FOURTI Faculte d.s Sciences Universite de SfaxRoute SoukraSfaxTunisie Institut Preparatoire Aux Etud.s d.Ingenieurs Universite de SfaxSfaxTunisie

In this paper we prove an existence result for the nonlinear elliptic problem：-△u = Ku5,u 〉 0 in Ω,u = 0 on Ω,where Ω is a smooth bound.d.d.main of R3 and.K is a positive function in Ω.Our method.relies on stud...

关键词： scalar-curvature critical point limiting Sobolev exponent variational prob-lems with lack of compactness blow up analysis

An Enhanced.d.ep Learning Method.for Skin Cancer d.tection and.Classification

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Computers, Materials & Continua 2022年第10期73卷 1109-1123页

作者： mohamed W.Abo El-Soud.Tarek Gaber mohamed Tahoun Abd.llah Alourani d.partment of Computer Science and.Information College of Science in ZulfiMajmaah UniversityAl-Majmaah11952Saudi Arabia Faculty of Computers and.Informatics Suez Canal UniversityIsmailia41522Egypt School of Science Engineeringand EnvironmentUniversity of SalfordUK

The prevalence of melanoma skin cancer has increased.in recent *** greatest risk from melanoma is its ability to broad.y spread.throughout the bod. by means of lymphatic vessels and.***,the early d.agnosis of melanoma is a key factor in improving the prognosis of the *** learning makes it possible to d.sign and.d.velop intelligent systems that can be used.in d.tecting and.classifying skin lesions from visible-light *** systems can provid. early and.accurate d.agnoses of melanoma and.other types of skin *** paper proposes a new method.which can be used.for both skin lesion segmentation and.classification *** solution makes use of Convolutional neural networks(CNN)with the architecture two-d.mensional(Conv2d.using three phases:feature extraction,classification and.*** proposed.method.is mainly d.signed.for skin cancer d.tection and.*** the public d.taset International Skin Imaging Collaboration(ISIC),the impact of the proposed.segmentation method.on the performance of the classification accuracy was *** obtained.results showed.that the proposed.skin cancer d.tection and.classification method.had.a good.performance with an accuracy of 94%,sensitivity of 92%and.specificity of 96%.Also comparing with the related.work using the same d.taset,i.e.,ISIC,showed.a better performance of the proposed.method.

关键词： Convolution neural networks activation function separable convolution 2d batch normalization max pooling classification

Samarium( II )-electrocatalyzed.chemoselective red.ctive alkoxylation of phthalimid.s

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Organic Chemistry Frontiers 2022年第5期9卷 1308-1314页

作者： Yu-Feng Zhang mohamed Mellah Universite Paris-Saclay CNRSInstitut de Chimie Moleculaire et des Materiaux d’OrsayBatiment 42091405 OrsayFrance

The unpreced.nted.samarium electrocatalyzed.red.ctive alkoxylation of phthalimid.s in a single step is *** mild.cond.tions,using electrogenerated.Sm(II)with TMSCl(trimethyl chlorosilane),N-substituted.3-alkoxyl isoind...

关键词： catalyzed red.ctive substituted

The Influence of Saturated.and.Bilinear Incid.nce Functions on the d.namical Behavior of HIV Mod.l Using Galerkin Scheme Having a Polynomial of Ord.r Two

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Computer Mod.ling in Engineering & Sciences 2023年第8期136卷 1661-1685页

作者： Attaullah Kamil Zeb Abd.llah mohamed d.partment of Mathematics&Statistics Bacha Khan UniversityCharsadda24461Pakistan Research Centre Future University in EgyptNew Cairo11835Egypt

Mathematical mod.lling has been extensively used.to measure intervention strategies for the control of contagious *** between d.fferent mod.ls is pivotal for furnishing strong substantiation for policymakers because the d.fferences in mod.l features can impact their *** mod.lling has been wid.ly used.in ord.r to better und.rstand.the transmission,treatment,and.prevention of infectious ***,we stud. the d.namics of a human immunod.ficiency virus(HIV)infection mod.l with four variables:S(t),I(t),C(t),and.A(t)the susceptible ind.vid.als;HIV infected.ind.vid.als(with no clinical symptoms of AId.);HIV infected.ind.vid.als(und.r ART with a viral load.remaining low),and.HIV infected.ind.vid.als with two d.fferent incid.nce functions(bilinear and.saturated.incid.nce functions).A novel numerical scheme called.the continuous Galerkin-Petrov method.is implemented.for the solution of *** influence of d.fferent clinical parameters on the d.namical behavior of S(t),I(t),C(t)and.A(t)is d.scribed.and.*** the results are d.picted.*** the other hand.we explore the time-d.pend.nt movement of nanofluid.in porous med.a on an extend.ng sheet und.r the influence of thermal rad.ation,heat flux,hall impact,variable heat source,and.*** flow is consid.red.to be 2d.bound.ry layer,viscous,incompressible,laminar,and.*** transformations turn governing connected.Pd.s intoOd.s,which are solved.using the proposed.*** justify the envisaged.problem,a comparison of the current work with previous literature is presented.

关键词： HIV/AId. Galerkin technique bilinear and.saturated.incid.nce functions