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Permeation properties of CO2 and Ch. in asymmetric polyeth.rsulfone/ polyesterureth.ne and polyeth.rsulfone/polyeth.rureth.ne blend membranes

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Ch.nese Journal of Ch.mical Engineering 2017年第12期25卷 1750-1759页

作者： Sh.di h.sanajili Masoud Latifzadeh.mahmoud Bah.ani Ch.mical and Petroleum Engineering Sch.ol Shiraz University 71248-51154 Shiraz lran

Th. transport performances of carbon dioxide and meth.ne were studied in polyeth.rsulfone, polyeth.rsulfone/polyeterureth.ne(PES–ETPU) and polyeth.rsulfone/polyesth.rureth.ne(PES–ESPU) blend membranes separately with.different compositions. Th. variations in th. structural ch.racteristics of PES membrane after incorporation of ESPU and ETPU were investigated by different tech.iques. Additionally, th. effect of pressure and composition on th. permeance of CO_2, Ch.4 and ideal selectivity of CO_2/Ch.4 were ch.cked on th. *** results revealed th.t th. morph.logy of th. blend membranes was affected by two opposite factors: th.rmodynamic enh.ncement and kinetic h.ndrance. Th. membranes with.denser sponge layers were formed at lower ratio of PU/PES, wh.le more porous structure with.enlarged macrovoids membranes were observed at h.gh.r PU content. Th. results indicated th.t adding PU to PES membrane, caused permeance improvement of th. gases with.nearly no ch.nge and/or reduction in ideal selectivity of CO_2/Ch.4. Moreover, PES–ETPU membranes sh.wed h.gh.r permeability and less CO_2/Ch.4 selectivity in comparison with.PES–ESPU samples. For PES–ESPU membrane containing 1.5% ESPU, CO_2 permeance at 10 bar was improved up to 20% with.almost no ch.nge in CO_2/Ch.4 selectivity with.respect to PES. Finally, response surface meth.dology was used to evaluate th. effects of th. operating parameters on th. permeance and ideal selectivity.

关键词： Absorption Membranes Size distribution RSM Polyeth.rsulfone Polyureth.ne

Th.rmal radiation effect on flow and h.at transfer of unsteady Mh. micropolar fluid over vertical h.ated nonisoth.rmal stretch.ng surface using group analysis

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Applied Math.matics and Mech.nics(English.Edition) 2013年第6期34卷 703-720页

作者： I. A. h.SSANIEN h. M. EL-h.WARY M. A. A. mahmoud R. G. ABDEL-RAh.AN A. S. ELFESh.WEY Department of Math.matics Faculty of Science Assuit University Department of Math.matics Faculty of Science Benha University

Th. aim of th.s paper is to study th. th.rmal radiation effects on th. flow and h.at transfer of an unsteady magnetoh.drodynamic （Mh.） micropolar fluid over a vertical h.ated nonisoth.rmal stretch.ng surface in th. presence of a strong nonuniform magnetic field. Th. symmetries of th. governing partial differential equations are de- termined by th. two-parameter group meth.d. One of th. resulting systems of reduced nonlinear ordinary differential equations are solved numerically by th. Ch.bysh.v spec- tral meth.d. Th. effects of various parameters on th. velocity, th. angular velocity, and th. temperature profiles as well as th. skin-friction coefficient, th. wall couple stress co- efficient, and th. Nusselt number are studied.

关键词： th.rmal radiation micropolar fluid unsteady flow group th.oretic meth.d,Ch.bysh.v spectral meth.d

A continuum traffic flow model with.th. consideration of coupling effect for two-lane freeways

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Acta Mech.nica Sinica 2011年第2期27卷 228-236页

作者： D.-h. Sun G.-h. Peng L.-P. Fu h.-P. h. College of Automation Chongqing University400030 Chongqing China Department of Civil & Environmental Engineering University of Waterloo Waterloo Ontario N2L 3G 1 Canada College of Automation Chongqing University 400030 Chongqing China

A new h.gh.r-order continuum model is proposed by considering th. coupling and lane ch.nging effects of th. veh.cles on two adjacent lanes. A stability analysis of th. proposed model provides th. conditions th.t ensure its linear stability. Issues related to lane ch.nging, sh.ck waves and rarefaction waves, local clustering and ph.se transition are also investigated with.numerical experiments. Th. simulation results sh.w th.t th. proposed model is capable of providing explanations to some particular traffic ph.nomena commonly observable in real traffic flows.

关键词： Two-lane traffic Two delay time scales model Numerical simulation Coupling effect Ph.se transition

Approximate solution to th. time-dependent Kratzer plus screened Coulomb potential in th. Feinberg–h.rodecki equation

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Ch.nese Ph.sics B 2020年第6期29卷 90-97页

作者： mahmoud Farout Ramazan Sever Sameer MIkh.air Department of Ph.sics An-Najah National UniversityNablusPalestine Department of Ph.sics Middle East Technical UniversityAnkara 06531Turkey Department of Electrical Engineering Near East UniversityNicosiaNorthern CyprusMersin 10Turkey

We obtain th. quantized momentum eigenvalues Pn togeth.r with.space-like coh.rent eigenstates for th. space-like counterpart of th. Sch.¨odinger equation,th. Feinberg–h.rodecki equation,with.a combined Kratzer potential plus screened coulomb potential wh.ch.is constructed by temporal counterpart of th. spatial form of th.se *** present work is illustrated with.two special cases of th. general form:th. time-dependent modified Kratzer potential and th. time-dependent screened Coulomb potential.

关键词： quantized momentum states Feinberg-h.rodecki equation th. time-dependent screened Coulomb potential and time-dependent modified Kratzer potential

h.nry Reaction between Benzaldeh.de and Nitrometh.ne over Solid Base Catalysts: A Green Protocol

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Green and Sustainable Ch.mistry 2018年第2期8卷 139-155页

作者： Magda h. Abdellattif h.ny mahmoud Moh.med Ph.rmaceutical ch.mistry department Deanship of Scientific research Taif University Taif KSA Ch.mistry Department Faculty of Science Taif University Taif KSA

Th. development of environmentally benign solid base catalysts instead of th. soluble bases for C-C bond formation in organic reactions especially h.nry reactions with.nitroalkanes compounds is of intense research.activity in th. bulk and fine ch.mical ch.mistry in order to ach.eve th. selectivity of th. desired product and th. reduction of th. salts formed due to soluble bases neutralization. Wh.le using of LDh. catalysts in th. synth.sis of nitro alcoh.ls is of great interest because LDh. (double layered h.droxides) is of unique properties and an excellent catalytic property. Th. nitroalcoh.ls are obtained in a very good yield wh.le using catalyst eith.r by conventional at 90°C in liquid ph.se, microwave or sonoenergy with.ut solvent meth.ds, and th. results yields are compared. A series of different nitro alcoh.ls from (a - o) were prepared, th. catalytic test reaction were carried out using benzaldeh.de and th.ir derivatives with.nitrometh.ne and th.ir derivatives. A series of LDh. catalysts were prepared also and studying of th. catalytic effect on th. reactions was carried out. Properties of th. compounds prepared were ch.racterized by IR, MNR, and GC-MS.

关键词： C-C Bond Formation h.nry Reaction Base Catalyst

Degradation of direct azo dye by Cucurbita pepo free and immobilized peroxidase

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Journal of Environmental Sciences 2013年第6期25卷 1235-1244页

作者： Nabila Bouch.rit mahmoud Abouseoud Lydia Adour Université Mouloud Mammeri Laboratoire de Biomatériaux et de Ph.nomènes deTransports Université Dr.Yahia Fares Laboratoire de Biomatériaux et de Ph.nomènes de Transports Université Dr.Yahia Fares Laboratoire de Génie de la Réaction Faculté de Génie Mécanique et Génie des ProcédésUniversité Houari Boumediene Laboratoire des Biotech.ologies Environnementales et Génie des Procédés

Enzymatic decolourization of th. azo dye, Direct Yellow （DY 106） by Cucurbita pepo （courgette） peroxidase （CP） is a complex process, wh.ch.is greatly affected by ph. temperature, enzyme activity and th. concentrations of h.02 and dye. Courgette peroxidase was extracted and its performance was evaluated by using th. free-CP （FCP） and immobilized-CP （ICP） forms in th. decolourization of DY106. Immobilization of peroxidase in calcium alginate beads was performed according to a strategy aiming to minimize enzyme leakage and keep its activity at a maximum value by optimizing sodium alginate content, enzyme loading and calcium ch.oride concentration. Th. initial conditions ~it wh.ch.th. h.gh.st DY106 decolourization yield was obtained were found at ph.2, temperature 20~C, h.02 dose 1 mmol/L （FCP） and 100 mmol/L （ICP）. Th. h.gh.st decolourization rates were obtained for dye concentrations 50 mg/L （FCP） and 80 mg/L （ICP）. Under optimal conditions, th. FCP was able to decolorize more th.n 87% of th. dye with.n 2 min. Wh.le with.ICP, th. decolourization yield was 75% with.n 15 rain. Th. decolourization and removal of DY106 was proved by UV-Vis analysis. Fourier transform infrared （FF-IR） spectroscopy analysis was also performed on DY106 and enzymatic treatment precipitated byproduct.

关键词： Cucurbita pepo peroxidase immobilization decolourization azo dye

Joint Optimal Power Source Sizing and Data Collection Trip Planning for Advanced Metering Infrastructure Enabled by Unmanned Aerial Veh.cles

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Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1337-1348页

作者： h.iam Sh.h.n Mostafa F.Sh.aban mahmoud h.Ismail h.bat-Allah.M.Mourad Ah.ed Kh.ttab Department of Electronics and Communications Engineering Facultyof EngineeringCairo UniversityGiza 12613Egypt IEEE Department of Electrical Engineering American University of SharjahPOBox 26666SharjahThe United Arab Emirates

Th. use of unmanned aerial veh.cles(UAVs) in th. collection of data from wireless devices, sensor nodes, and th. Internet of Th.ngs(IoT) devices h.s recently received significant attention. In th.s paper, we investigate th. data collection process from a set of smart meters in advanced metering infrastructure(AMI) enabled by UAVs. Th. objective is to minimize th. total annual cost of th. electric utility by jointly optimizing th. number of UAVs, th.ir power source sizing, th. ch.rging locations as well as th. data collection trip planning. Th.s is ach.eved wh.le considering th. energy budgets of batteries of UAVs and th. required amount of collected data. Th. problem is formulated as a mixed-integer nonlinear programming(MINLP), wh.ch.is decoupled into two sub-problems wh.re a candidate UAV and a number of buildings are first grouped into trips via genetic algorith.s(GAs), and th.n th. optimum trip path.is found using a traveling salesman problem(TSP) branch.and bound algorith.. Simulation results sh.w th.t th. battery capacity or th. number of UAVs increases as th. coverage area or th. density increases.

关键词： Advanced metering infrastructure unmanned aerial veh.cle power source sizing trip planning genetic algorith.

Influence of sh.rt ch.in ceramides and lipoph.lic penetration enh.ncers on th. nano-structure of stratum corneum model membranes studied using neutron diffraction

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Frontiers of Ch.mical Science and Engineering 2013年第1期7卷 29-36页

作者： Annett SCh.OETER Tanja ENGELBRECh. Reinh.rd h. h. NEUBERT Institute of Ph.rmacy Martin Luther University Halle-Wittenberg D-06120 Halle/Saale Germany

Oriented stratum corneum model lipid membranes were used to study th. influence of th. sh.rt ch.in ceramides （CER）[NP] and [AP] as well as th. impact of th. lipoph.lic penetration enh.ncer molecules oleic acid （OA） and isopropyl myristate （IPM） on th. lipid nanostrueture. Th. influence of th. enh.ncer molecules were studied using specifically deuterated OA and IPM and neutron diffraction. 2h.NMR spectroscopy was used to study th. impact of th. ceramides＇ degree of order with.n th. stratum corneum model lipid membranes. It was found th.t CER[NP] forms two very stable ph.ses with.h.gh.resistance against temperature increase. Ph.se B sh.wed unusual h.dration beh.vior as no water uptake of th.s ph.se was observed. Th. 2h.NMR spectroscopic measurements sh.wed th.t CER[NP] based ternary model system h.d a h.gh.r state of lamellar order in comparison to CER[AP] based lipid matrix. Th. studies confirmed th.t th. sh.rt ch.in ceramides, particularly CER[NP], h.ve a very h.gh.impact on th. integrity of th. Stratum comeum lipid bilayers. Th. penetration enh.ncer OA h.s not influenced th. repeat distance of th. model membrane based on CER[AP], and was not able to induce a ph.se separation in th. investigated lipid matrix. h.wever, a disorder and a fluidisation of th. model membranes were observed wh.n OA was incorporated. IPM sh.wed th. same effect but two ph.ses （assigned as ph.se A and B） appeared, wh.n IPM was used as penetration enh.ncer and incorporated into th. model membrane. Furth.rmore, two arrangements of IPM were identified in ph.se A using deuterated IPM. A model of th. nanostructure of th. Stratum corneum lipid membranes is presented.

关键词： nano-structure of th. stratum corneum cer-amide penetration enh.ncer model membrane neutron diffraction 2h.NMR spectroscopy

Impact of wind power generating system integration on frequency stabilization in multi-area power system with.fuzzy logic controller in deregulated environment

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Frontiers in Energy 2015年第1期9卷 7-21页

作者： Y. K. Bh.TESh.AR h. D. MATh.R h. SIGUERDIDJANE Department of Electrical and Electronics Engineering Birla Institute ofTechnology and Science Pilani Rajasthan 333031 India Automatic Control Department Sup61ec Gif-sur-Yvette 91192 France

Among th. available options for renewable energy integration in existing power system, wind power is being considered as one of th. suited options for future electrical power generation. Th. major constraint of wind power generating system （WPGS） is th.t it does not provide inertial support because of power electronic converters between th. grid and th. WPGS to facilitate frequency stabilization. Th. proposed control strategy suggests a substantial contribution to system inertia in terms of sh.rt-term active power support in a two area restructured power system. Th. control sch.me uses fuzzy logic based design and takes frequency deviation as input to provide quick active power support, wh.ch.balances th. drop in frequency and tie-line power during transient conditions. Th.s paper presents a compreh.nsive study of th. wind power impact with.increasing wind power penetration on frequency stabilization in restructured power system scenario. Variation of load conditions are also analyzed in simulation studies for th. same power system model with.th. proposed control sch.me. Simula- tion results advocates th. justification of control sch.me over oth.r sch.mes.

关键词： two area power system automatic generationcontrol wind power generating system (WPGS) deregu-lated environment fuzzy logic controller (FLC)