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Modeling of microreactor for syngas production by catalytic partial oxidation of methane

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Journal of Natural Gas Chemistry 2010年第6期19卷 660-668页

作者： Akbar Zamaniyan Alireza Behroozsarand Hamid Mehdizadeh hussein Ali Ghadirian Department of Natural Gas Conversion Gas Research DivisionResearch Institute of Petroleum Industry (RIPI)Tehran 14665-1998Iran Department of Chemical Engineering Islamic Azad UniversityIlkhchi BranchIlkhchiTabriz 53581-1148Iran Department of Chemical Engineering NTNUTrondheimNO-7491Norway

Fixed-bed reactors for the catalytic partial oxidation of methane （CPOM） to produce synthesis gas still pose hot spots *** is a good alternative reactor proposed to resolve these *** this paper,synthesis gas （hydrogen and carbon monoxide） production was investigated by a two-dimensional numerical model of single *** fluid dynamic （CFD） modeling with detailed chemistry was conducted to understand the CPOM on platinum （Pt） *** inlet velocity,microchannel pressure,and fuel to air ratio （F/A） are selected as the effective parameters on microchannel *** results show that Reynolds number has considerable effect on methane conversion,hydrogen to carbon monoxide ratio （H2/CO）,and product *** gas inlet velocity causes all the above parameters to *** is noted that increasing microchannel pressure and decreasing the ratio of fuel to air cause the decrease of the H2/CO ratio.

关键词： synthesis gas microchannel catalytic partial oxidation of methane reynolds number

Design, Sonosynthesis, Quantum-Chemical Calculations, and Evaluation of New Mono-and Bis-pyridine Dicarbonitriles as Antiproliferative Agents

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Chinese Journal of Chemistry 2020年第5期38卷 501-508页

作者： Wael Abdelgayd Ahmed Arafa Modather F.hussein Chemistry Department College of ScienceJouf UniversityP.O.Box 2014SakakaAljoufKingdom of Saudi Arabia Chemistry Department Faculty of ScienceFayoum UniversityP.O.Box 63514Fayoum CityEgypt Chemistry Department Faculty of ScienceAl-Azhar UniversityAsyut branchEgypt

A highly efficient,simple,and clean single-step sonosynthetic procedure has been sophisticated for assembling new series of mono-and bis-pyridine dicarbonitriles from ketones,HCl,and *** presented protocol is applicable for the preparation of a broad range of uniquely substituted pyridine dicarbonitriles and seems to be superior in comparison with other previously reported *** antiproliferative impact of the newly synthesized derivatives was screened towards three representative cancer cell lines(MCF-7,A549,and HCT116).Most of the evaluated derivatives showed a moderate to excellent anti-proliferative activity towards the selected cell *** these,compounds 4h,4k,10,12a,and 12b showed both potent anticancer activity(ICs058μM)on non-tumorigenic cells(MCF-10A and NCM460),suggesting their promising potential to be lead molecules for future antitumor drug *** structure-activity relationships have been also ***,quantum chemical studies based on Density Functional Theory(DFT)of the synthesized compounds were investigated and found to be consistent with the in vitro inhibitory activities.

关键词： pyridine nitrile synthesis

Optimization of Rolling Parameters for Enhancing Surface Integrity of Aluminum Alloy

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Journal of Harbin Institute of Technology(New Series) 2023年第6期30卷 70-82页

作者： Emad Ali hussein Jabbar Gattmah Ayad Naseef Jaseem Suha k Shihab Production Engineering and Metallurgy University of TechnologyBaghdad 10066Iraq Department of Material Engineering College of EngineeringUniversity of DiyalaBaqubah 32001DiyalaIraq

In this current work,aluminum alloy grade 2024 is adopted as a plate material that is used in the rolling process with three different parameters including thickness reduction,forming temperature,and density of lubrication *** experimental procedure of the rolling process is performed using the design of the experiment based on the Taguchi technique(L27),then surface roughness,surface hardness,and surface residual stresses are *** results showed that the lubrication density has a significant impact on the surface roughness which depends on the lubrication properties(mineral oil type,natural fat,and kinematic viscosity)while surface hardness and surface residual stresses were strongly affected by thickness *** the other side,the augment in forming temperature can decrease the quality of the final surface finish and the surface hardness but reduce the induced residual *** best surface finish is obtained based on the optimum condition of the rolling factors are(R%_(3),T_(1),andρ_(3))while the optimum condition of rolling parameters that generate higher hardness and compressive residual stresses are(R%_(3)T_(1)ρ_(1)).

关键词： Rolling operation Taguchi technique Al2024 Surface roughness Surface hardness Surface residual stresses

Colorectal cancer: The epigenetic role of microbiome

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World Journal of Clinical Cases 2019年第22期7卷 3683-3697页

作者： hussein Sabit Emre Cevik Huseyin Tombuloglu Department of Genetics Institute for Medical Research and Consultations Imam Abdulrahman Bin Faisal University

Colorectal cancer(CRC)is the third most common cancer in men(746000 cases per year)and the second most common cancer in women globally(614000 cases per year).The incidence rate of CRC in developed countries(737000 cases per year)is higher than that in less developed countries(624000 cases per year).CRC can arise from genetic causes such as chromosomal instability and microsatellite *** etiologic factors underlie CRC including age,diet,and *** microbiota represent a proven cause of the disease,where they play pivotal roles in modulating and reshaping the host *** active microbial metabolites have been found to drive carcinogenesis,invasion,and metastasis via modifying both the methylation landscape along with histone structure in intestinal *** microbiota,in response to diet,can exert both beneficial and harmful functions in humans,according to the intestinal balance of number and types of these *** the intestinal microbial community is diverse among individuals,these microbes cumulatively produce 100-fold more proteins than the human genome itself,which calls for further studies to elaborate on the complicated interaction between these microorganisms and intestinal ***,understanding the exact role that gut microbiota play in inducing CRC will help attain reliable strategies to precisely diagnose and treat this fatal disease.

关键词： Colorectal Cancer Colorectal cancer Epigenetics Gut Microbiota

Adaptive Event-Triggering Consensus for Multi-Agent Systems with Linear Time-Varying Dynamics

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Journal of Systems Science & Complexity 2022年第5期35卷 1700-1718页

作者： ZHANG Wenbing ABUZAR hussein MOHAMMED Atitalla BAO Jiatong LIU Yurong School of Mathematical Sciences Yangzhou UniversityYangzhou 225002China School of Electrical Energy and Power EngineeringYangzhou UniversityYangzhou 225009China

In this paper,the authors study the fully distributed event-triggering consensus problem for multi-agent systems with linear time-varying dynamics,where each agent is described by a linear time-varying *** adaptive event-triggering protocol is proposed for time-varying multi-agent systems under directed *** on the Gramian matrix of linear time-varying systems,the design of control gain is done and sufficient conditions ensuring the consensus of linear time-varying multiagent systems are *** is shown that the coupling strength is closely related to the triggering *** it comes to undirected graph,it is shown that the coupling strength is independent on the triggering condition and thus the design procedure is of more freedom than the directed *** addition,it is also proved that Zeno behaviours can be excluded in the proposed protocols.A numerical example is presented to demonstrate the effectiveness of the theoretical results.

关键词： Consensus event-triggering fully distributed control multi-agent systems time-varying systems

A case of probable sporadic Creutzfeldt-Jakob disease

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Family Medicine and Community Health 2017年第4期5卷 282-285页

作者： Norita hussein Department of Primary Care Medicine Faculty of Medicine50603Kuala LumpurMalaysia

Creutzfeldt-Jakob Disease(CJD)is a fatal neurodegenerative brain *** author describes a case presented to primary care clinic whereby neuropsychiatric symptoms were the patient’s initial presentation which later manifested with declining cognitive impairment,myoclonus and extrapyramidal symptoms.A typical abnormal magnetic resonance imaging(MRI)features were *** patient succumbed within six months of presentation.

关键词： Creutzfeldt-Jakob disease neurodegenerative brain disease neuropsychiatric

Accurate surface potential determination in Schottky diodes by the use of a correlated current and capacitance voltage *** to n-InP

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Journal of Semiconductors 2011年第10期32卷 39-43页

作者： Ali Ahaitouf Abdelaziz Ahaitouf Jean Paul Salvestrini hussein Srour Laboratoire Signaux Systemes et Composants DGE Faculty of Sciences and TechnologyUniversite Sidi Mohammed Ben AbdellahP.O.Box 2202FES Morocco LIMAO Faculte polydisciplinaire de Taza Universite Sidi Mohammed Ben Abdellah de FesBP 1223 Taza-GareMorocco Laboratoire Materiaux Optiques Photonique et SystemesEA 4423Universite Paul Verlaine-MetzSupelec2 rue E.Belin57070 MetzFrance

Based on current voltage（I-Vg） and capacitance voltage（C-Vg） measurements,a reliable procedure is proposed to determine the effective surface potential Vd（Vg） in Schottky *** the framework of thermionic emission,our analysis includes both the effect of the series resistance and the ideality factor,even voltage dependent. This technique is applied to n-type indium phosphide（n-InP） Schottky diodes with and without an interfacial layer and allows us to provide an interpretation of the observed peak on the C-Vg *** study clearly shows that the depletion width and the flat band barrier height deduced from C-Vg,which are important parameters directly related to the surface potential in the semiconductor,should be estimated within our approach to obtain more reliable information.

关键词： Schottky diode interface states surface potential ideality factor barrier height capacitance voltage current measurements

Plant Leaf Diseases Classification Using Improved k-Means Clustering and SVM Algorithm for Segmentation

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Computers, Materials & Continua 2023年第7期76卷 367-382页

作者： Mona Jamjoom Ahmed Elhadad hussein Abulkasim Safia Abbas Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadhSaudi Arabia Department of Computer Science Faculty of Computers and InformationSouth Valley UniversityQena83523Egypt Faculty of Science New Valley UniversityEl-Kharga72511Egypt Department of Computer Science Faculty of Computer and Information SciencesAin Shams UniversityCairo11566Egypt

Several pests feed on leaves,stems,bases,and the entire plant,causing plant *** a result,it is vital to identify and eliminate the disease before causing any damage to *** detecting plant disease and treating it is pretty challenging in this *** processing is employed to detect plant disease since it requires much effort and an extended processing *** main goal of this study is to discover the disease that affects the plants by creating an image processing system that can recognize and classify four different forms of plant diseases,including Phytophthora infestans,Fusarium graminearum,Puccinia graminis,tomato yellow leaf ***,this work uses the Support vector machine(SVM)classifier to detect and classify the plant disease using various steps like image acquisition,Pre-processing,Segmentation,feature extraction,and *** gray level co-occurrence matrix(GLCM)and the local binary pattern features(LBP)are used to identify the disease-affected portion of the plant *** to experimental data,the proposed technology can correctly detect and diagnose plant sickness with a 97.2 percent accuracy.

关键词： SVM machine learning GLCM algorithm k-means clustering LBP

LMI solutions for H-two and H-infinity decentralized controllers applied to an aerothermic process

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控制理论与应用（英文版） 2013年第2期11卷 247-254页

作者： Najib BENNIS Mustapha RAMZI Mohamed HALOUA hussein YOULAL ENSET de Rabat Avenue de l'Arme'e Royale Madinat Al Irfane 10100 B. P. 6207 Rabat-InstitutsMorocco LASTIMI EST de sale' Universite' Mohamed V Agdal Avenue Prince sidi Mohammed B.P 227 Sale' Me'dinaMorocco EMI Avenue IbnSina B. P. 765 Agdal RabatMorocco UFR Automatique et Technologies de l'Information Faculte' des Sciences de Rabat Avenue Ibn Batouta B. P. 1014 RabatMorocco

In this paper, we present a linear matrix inequality （LMI）-based solution to implement H-two and H- infinity decentralized robust control strategies. Appropriate parametrization of optimal H-two and H-infinity controllers is used. The general formulation of the decentralized control design leads to the optimal determination of both the state feedback gains and the observer gains of the decentralized controllers. This formulation is two folds： first, a centralized controller is obtained, and then, a simplified decentralized solution is derived by optimizing only the observer gains. The mathematical determination of these gains is formulated as an LMI optimization problem that can be easily solved using LMI solvers. As an experimental evaluation of these controllers, a real time application to an aerothermic process is carried out. A continuous-time model of the process obtained with a suitable direct continuous-time identification approach is elaborated. Results illustrating the real performance obtained from the H-two and H-infinity decentralized controllers are di^cu^ge.d and comnare, d with th~ ce^ntraliTed nn^g

关键词： Parametrization approach Decentralized control H-two/H-infinity control Parameters optimization Lin-ear matrix inequality (LMI) Subspace identification Aerothermic process