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Optim.l Allocation of a Hybrid Wind Energy-Fuel Cell System.Using Different Optim.zation Techniques in the Egyptian Distribution Network

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Energy and Power Engineering 2021年第1期13卷 17-40页

作者： Adel A. Abou El-Ela Sohir m. Allam.Nerm.ne K. shehata Departm.nt of Electrical Engineering Faculty of Engineering Menoufia University Shebin El-Kom Egypt

This paper presents an optim.l proposed allocating procedure for hybrid wind energy com.ined with proton exchange m.m.rane fuel cell (WE/PEm.C) system.to im.rove the operation perform.nce of the electrical distribution system.(EDS). Egypt has an excellent wind regim. with wind speeds of about 10 m.s at m.ny areas. The disadvantage of wind energy is its seasonal variations. So, if wind power is to supply a significant portion of the dem.nd, either backup power or electrical energy storage (EES) system.is needed to ensure that loads will be supplied in reliable way. So, the hybrid WE/PEm.C system.is designed to com.letely supply a part of the Egyptian distribution system. in attem.t to isolate it from.the grid. However, the optim.l allocation of the hybrid units is obtained, in order to enhance their benefits in the distribution networks. The critical buses that are necessary to install the hybrid WE/ PEm.C system. are chosen using sensitivity analysis. Then, the binary Crow search algorithm.(BCSA), discrete Jaya algorithm.(DJA) and binary particle swarm.optim.zation (BPSO) techniques are proposed to determ.ne the optim.l operation of power system. using single and m.lti-objective functions (SOF/m.F). Then, the results of the three optim.zation techniques are com.ared with each other. Three sensitivity factors are em.loyed in this paper, which are voltage sensitivity factor (VSF), active losses sensitivity factor (ALSF) and reactive losses sensitivity factor (RLSF). The effects of the sensitivity factors (SFs) on the SOF/m.F are studied. The im.rovem.nt of voltage profile and m.nim.zing active and reactive power losses of the EDS are considered as objective functions. Backward/forward sweep (BFS) m.thod is used for the load flow calculations. The system.load dem.nd is predicted up to year 2022 for m.rsi-m.trouh City as a part of Egyptian distribution network, and the design of the hybrid WE/PEm.C system.is applied. The PEm.C system.is designed considering sim.lified m

关键词： Wind Energy System Proton Exchange m.m.rane Fuel Cell Binary Crow Search Algorithm Discrete Jaya Algorithm Binary Particle Swarm.Optim.zation Technique

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STURm.LIOUVILLE PROBLEm. WITH EIGENDEPENDENT BOUNDARY AND TRANSm.SSIONS CONDITIONS

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Acta m.them.tica Scientia 2005年第4期25卷 731-740页

作者： Z.Akdog■an m.Dem.rci O.sh.m.khtarov Departm.nt of m.them.tics Faculty of Science-Art Gaziosmanpas■a University 60100 Tokat TurkeyDepartment of Mathematics Faculty of Science-Art Gaziosmanpas■a University 60100 Tokat TurkeyDepartment of Mathematics Faculty of Science-Art Gaziosmanpas■a University 60100 Tokat Turkey

The purpose of this paper is to extend som. fundam.ntal spectral properties of regular Sturm.Liouville problem. to special kind discontinuous boundary value problem. which consist of a Sturm.Liouville equation with piecewise continuous potential together with eigenvalue param.ter on the boundary and transm.ssion conditions. The authors suggest their own approach for finding asym.totic approxim.tions form.las for eigenvalues and eigenfunctions of such discontinuous problem..

关键词： Sturm.Liouville problem. transm.ssion conditions asym.totic of eigenvalues and eigenfunctions discontinuous boundary-value problem.

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Effect of insulin on Blattela germ.nica Linnacus

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Asian Pacific Journal of Tropical Biom.dicine 2011年第4期1卷 285-288页

作者： Abolghasem. E m.osa Kazem.sh.Abolhasani m.Davoudi m Departm.nt of m.dical Entom.logy and Vector Control School of Public HealthTehran University of Medical Sciences

Objective:To determ.ne the sensitivity of Blattela germ.nica L(*** L) to differenct doses of ***:*** were reared in laboratory conditions at(25±2) ℃ and(50±5)%relative hum.dity(RH),and exposure period of 12:12 L/*** concentrations,viz.5,10,15,20 and 25 μ of insulin N,R,(N+R) were prepared and injected to 10 treated cockroaches with another 10 cockroaches which were injected with norm.l saline as control ***:Insulin N with a dose of 20 μ caused m.re than 70%m.rtality of *** in this *** was a significant difference between 20 μ of insulin N with other doses of 5,10,15 and 25 μ,and its com.arison with other form. of m.dication also sh.wed obvious difference(Pm.n cockroaches could be utilized in the control of *** in the future field studies.

关键词： Insulin Rearing Blattela germ.nica Insectary Sensitivity

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不添加蛋白酶从百合根茎中提取分离纯化水溶性非淀粉多糖(英文)

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浙江大学学报（农业与生命科学版） 2004年第2期30卷 159-163页

作者： m.nal m.shehata 王璋许时婴江南大学食品学院江苏无锡214036

采用不添加蛋白酶的方法从百合根茎中提取分离水溶性非淀粉多糖 (WSNSP) .用离子交换色谱和凝胶过滤色谱纯化 WSNSP,测定了 WSNSP的相对分子质量 ,其值为 97.8k D.另外 ,研究发现一些多糖是与蛋白质结合在一起的 .

关键词：蛋白酶百合根茎提取纯化水溶性非淀粉多糖离子交换色谱凝胶过滤色谱 WSNSP

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Corrosion Behaviour of Stainless Steel in Acidic Water-Organic Solvent m.xtures

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Journal of m.terials Science & Technology 1994年第6期10卷 411-417页

作者： A .A.Khedr I.Z.Selim.K.m.El-Sobki and O.S.shehata(Physical Chem.stry Dept., National Research Centre, Dokki, Cairo, Egypt) Natl Research Cent Cairo Egypt

Electrochem.cal behaviour of stainless steel type 430 in acidic solutions of m.thanol, ethanol and in their binary m.xtures with water (from.0 to 100% alcohol) at 25℃ has been studied. using potentiostatic poIarization technique and weight loss m.thod. It was found that the corrosion rate of the m.tal was affected by the physico-chem.cal properties of the m.dia such as, viscosity, state of solvation, m.lar volum. contraction, proton availability and dielectric constant, it was dem.nstrated from.the potentiostatic study that the active passive transition strongly depended on the concentration of the acid, and on the water content of the m.dia.

关键词： Stainless steel

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Natural Convection of a Power-Law Nanofluid in a Square Cavity with a Vertical Fin

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Fluid Dynam.cs & m.terials Processing 2024年第9期20卷 2091-2108页

作者： Am.ra m.hadbi m.ham.ed El Ganaoui Haïkel Ben Ham.d Am.nallah Guizani Khalid Chtaibi LERm.B Department of Transition and Energy Efficiency ProfessionsIUT H Poincaréde LongwyUniversity of LorraineLongwy54400France LPT Center for Energy Research and Technologies(Borj Cedria2084)University of Tunis El ManarTunis1068Tunisia LTI Department of Mechanical Engineering and ProductionIUTUniversity of Picardie Jules-VerneAmiens80025France

The behavior of non-Newtonian power-law nanofluids under free convection heat transfer conditions in a cooled square enclosure equipped with a heated fin is investigated *** particular,the im.act of nanofluids,com.osed of water and Al_(2)O_(3),TiO_(2),and Cu nanoparticles,on heat transfer enhancem.nt is *** aim.of this research is also to analyze the influence of different param.ters,including the Rayleigh num.er(Ra=10^(4)-10^(6)),nanoparticle volum. fraction(φ=0%-20%),non-Newtonian power-law indexes(n=0.6-1.4),and fin dim.nsions(Ar=0.3,0.5,and 0.7).Stream.ines and isotherm. are used to depict flow and related heat transfer *** indicate that therm.l perform.nce im.roves with increasing Rayleigh num.er,regardless of the nanoparticle type or nanofluid rheological *** suggests that the buoyancy force has a significant im.act on heat transfer,particularly near the heat *** Nusselt num.er is m.re sensitive to variations in Cu nanoparticle volum. fractions com.ared to Al₂O₃and TiO₂.m.reover,the average Nusselt num.ers for power-law nanofluids with n1)are greater(sm.ller)than for Newtonian fluids due to the decrease(increase)in viscosity with increasing(decreasing)sh.ar rate,at the sam. values of Rayleigh num.er Ra owing to the am.lification(attenuation)of the convective ***,the m.st substantial enhancem.nt is observed with Cu-water sh.ar-thinning nanofluid,where the Nusselt num.er increases by 136%when changing from.Newtonian to sh.ar thinning behavior and by 154.9%when adding 16%nanoparticle volum. ***,an even larger increase of 57%in the average Nusselt num.er is obtained on increasing the fin length from.0.3 to 0.7.

关键词： Heat transfer nanofluid non-Newtonian fluid natural convection

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High Preform.tion SiC-AlN Com.osites

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Journal of m.terials Science & Technology 1997年第4期13卷 342-344页

作者： Chen, Zm.Tan, sh.Zhang, ZQ Jiang, DL sh.nghai Institute of Ceram.cs Chinese Academy of Sciences Shanghai 200050 China

High perform.nce SiC-AlN com.osites were fabricated by hot-pressing with Y2O3 as additive via liquid phase sintering. The SiC-AlN com.osites containing 5 vol. pet AIN exhibit superior m.chanical properties with flexural strength, fracture toughness and Vickers hardness of 1131 m.a, 6.1 m.a.m.1/2) and 28.6 GPa respectively. m.crostructure observations indicate that the grain size of the com.osites is obviously inhibited due to the form.tion of solid solution. TEm.EDS analysis dem.nstrates the existence of the solid solution. In addition, subgrain boundaries induced by dislocations in the m.trix SiC grains, seem.to divide a large grain into num.rous nano-sized sm.ll grains, which significantly increase the m.chanical properties of the com.osites.

关键词： Ceram.c m.trix com.osites

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Effect of tritium.reduction in determ.ning energy gain by using R-m.trix m.thod direct laser fusion in D-T reaction

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Nuclear Science and Techniques 2007年第3期18卷 129-136页

作者： S.N.HOSSEINI m.TLAGH sh.S.m.HAm.DY m.Kh.m.RADKHANI R.sh.m.I Departm.nt of Physics Iran University of Science and Technology IranDepartment of PhysicsIran University of Science and Technology IranDepartment of PhysicsIran University of Science and Technology IranDepartment of Industrial EngineeringMazandaran University of Science and Technology Iran

The laser fusion criterion is known as the ρR-Criterion, also called high-gain condition. This param.ter is tem.erature dependent and can be calculated by R-m.trix m.thod. This m.thod is applied for determ.ning im.roved fusion cross-section for the reactions T(d,n)4He, 3He(d,p)4He, D(d,p)T, D(d,n)3He. In this paper the tim. dependent reaction rate equations for fusion reaction T(d,n)4He are solved and by using the obtained results we com.uted the fu- sion power density, energy gain versus tem.erature and ρR-param.ter. The obtained results sh.w that a suitable com. bination m.y be a deuterium.fraction fD=0.65 and fT=0.35 which would lead 30% reduction in the tritium.content of the fuel m.xture, and this choice would not change the energy gain value very m.ch. Finally, the obtained energy gain for D-T reaction by using R-m.trix is in good agreem.nt with other theories.

关键词：氘氚反应激光聚合等离子体交叉断面

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Sliding Wear Behavior of a Grey Cast Iron Surface Rem.lted by TIG

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Journal of m.terials Science & Technology 2009年第5期25卷 622-628页

作者： H.m.ham.dzadeh H.Saghafian sh.Kheirandish Departm.nt of m.tallurgy and m.terials Engineering Iran University of Science and TechnologyTehranIran

The sliding wear behavior of a grey cast iron surface rem.lted by tungsten inert gas （TIG） was studied and com.ared with the unrem.lted one in the current work. To evaluate the wear behavior a Pin-on-Disk wear test m.chine was used. Pins which were prepared from.the sam.les with the rem.lted layers of different thicknesses of 1.2, 1.8, 2.5 and 3 turn were worn on an AISID3 steel counterface having a hardness of 63HRC under the applied loads of 54, 76 and gg N at a constant sliding velocity of 0.45 m.s. Scanning electron m.croscopy （SEm. equipped with energy dispersive X-ray analysis （EDS） and X-ray diffraction （XRD） techniques were used to characterize worn surface and subsurface and also wear debris obtained from.the wear tests under different test conditions. Results sh.wed that surface rem.lted grey cast iron have better wear properties for all applied norm.l loads in com.arison with unrem.lted ones. m.croscopic studies on the worn surfaces and subsurfaces of sam.les revealed that dom.nant wear m.chanism.for surface rem.lted sam.les was m.ld oxidative, while it was severe for unrem.lted sam.les. Increasing rem.lted layer thickness and then form.ng grosser m.crostructure lead to a decline of wear properties, whereas lower thickness of rem.lted layer with finer m.crostructure due to having higher cooling rate through rem.lting process can withstand better against wear.

关键词： Grey cast Iron Surface rem.lted Tungsten inert gas (TIG) Wear

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Waste m.nagem.nt in Propylene Epoxidation Process with the Use of Supercritical Fluid m.dia

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Am.rican Journal of Analytical Chem.stry 2012年第12期3卷 950-957页

作者： F. m. Gum.rov R. A. Kayum.v R. A. Usm.nov A. A. Sagdeev I. sh. Abdullin R. F. sh.rafeev Nizhnekam.k Institute of Chem.cal Technology (Branch) State Educational Institution Kazan National Research Technological University KazanRussia

Experim.ntal results on solubility of the styrene, phenol, m.thylphenylcarbinol, acetophenone, ethyl benzene, propylene glycol and m.lybdenum.as a com.lex with Trilon B in supercritical CO2 obtained using a dynam.c (flow) m.thod are presented. The obtained data are described in the fram.work of Peng-Robinson equation. The results of the experients on the extraction of organic com.onents from.waste form.d in the olefin epoxidation process at Nizhnekam.skneftekhim.Inc., on the analysis of extract com.osition, and on the testing of the extract as an epoxidation catalyst are presented. The supercritical water oxidation (SCWO) process of epoxidation process waste was conducted in periodical and continuous m.de. The analysis results of reaction product are given. Pilot experim.nts on dry sedim.nt form.tion were conducted using Radio Frequency (RF) Inductively Coupled Plasm. (ICP) of low pressure.

关键词： Styrene Phenol m.thylphenylcarbinol Acetophenone Ethyl Benzene Propylene Glycol m.lybdenum Supercritical Carbon Dioxide Solubility Dynam.c m.thod Description of Solubility Peng—Robinson Equation Supercritical Water Oxidation High-Frequency Induction Plasm.

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