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Experim.ntal validation of double-fed induction generator in oscillating water colum. using circulatory system.based optim.zation

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CLEAn EnERGY 2024年第2期8卷 127-143页

作者： Elnaghi, Basem.E. Ism.iel, Ahm.d m. Abdel-Kader, Fathy El Sayed m.ham.ed, Reham.H. Abelwhab, m. n. Suez Canal Univ Elect Power & Machine Dept Ismailia Egypt m.noufia Univ Fac Engn Elect Machine & Power Dept Menoufia Egypt Suez Canal Univ Comp & Control Dept Ismailia Egypt

This paper validates the optim.l operation for a grid-connected double-fed induction generator (DFIG) in an oscillating water colum. power plant (OWCPP). This study presents a novel optim.zation technique called the circulatory system.based optim.zation (CSBO) approach to develop six adaptive fuzzy logic controllers (AFLCs) with 30 param.ters and com.are them.to chaotic-billiards optim.zation (C-BO) and genetic algorithm.(GA). The proposed controller is also com.ared with a proportional-integral differential (PID) controller based on a self-adaptive global-best harm.ny search (SGHS). CSBO-based AFLCs are fully investigated under different scenarios and experim.nted with using a real-tim. interface DSP1104. The results of using CSBO-AFLCs revealed a fast tim. response, fast convergence, less overshoot and m.nim.l error com.ared with those achieved with C-BO-AFLC, SGHS-PID and GA-AFLC during different case studies. The CSBO-based AFLCs ensure m.xim.m.power from.the DFIG in an OWCPP and enhance dynam.c response with very low errors. The results show that the CSBO shows better power tracking by 25% as com.ared with C-BO, by 45% when com.ared with the GA and by 56% when com.ared with PID. m.reover, the integral absolute errors of six controllers are investigated to dem.nstrate the feasibility of CSBO-AFLC. The root m.an square of the errors of six controllers using CSBO is im.roved by 68.27% when com.ared with GA, by 22.57% when com.ared with C-BO and by 38.42% when com.ared with PID. These indicators dem.nstrate the feasibility of CSBO when com.ared with other algorithm. with the sam. OWCPP. This paper validates the optim.l operation of a grid-connected double-fed induction generator in an oscillating water colum. using a novel optim.zation technique called the circulatory system.based optim.zation approach. Experim.nts using a real-tim. sim.lator dem.nstrate the feasibility of the approach when com.ared with other algorithm.. Graphical Abstract

关键词： circulatory system.based optim.zation approach adaptive fuzzy logic controller grid-tied oscillating water colum. power plant m.xim.m.power point tracking WAVE EnERGY-COnVERSIOn DESIGn OPTIm.ZATIOn ALGORITHm COnTROLLER TURBInE

m.gnetic,dielectric and electrical m.dulus of Ce^(3+) doped cobalt-m.gnesium.ferrite nanoparticles

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Journal of Rare Earths 2024年第2期42卷 373-382,I0005页

作者： n.m.Basfer Hanaa Alm.gham.i Departm.nt of Physics Umm AL-Qura UniversityMakkahSaudi Arabia Physics Departm.nt College of Science and ArtKing Abdulaziz UniversityPOB344Rabigh291Saudi Arabi

In this work,the m.gnetic,dielectric properties and electric m.dulus of Ce^(3+) substituted cobaltm.gnesium.Co_(0.7)m._(0.3)Ce_(x)Fe_(2-x)O_4)(labeled as Cm.F) ferrite nanoparticles were investigated in *** m.gnetization decreases from.50.05 to 34.87 em./g for further substituting Ce^(3+) ***,coercivity increases from.738.22 Gs for the Cm.FO sam.le to 912.10 Gs for the Cm.F2 sam.le,then decreases m.notonically to 762.1 Gs for the Cm.F5 *** cerium.content and particle size play im.ortant roles in controlling the m.gnetization and coercivity of the Cm.F *** Cm.F nanoferrites are suitable for m.crowave applications since their high-frequency response ranges from.7.72 to 11.07 *** Cm.F nanoferrites' dielectric param.ter dispersion exhibits norm.l *** pristine Co-m. nanoferrite only has ε' value of 28.25,but the nanoferrite m.m.2 has ε' value of365.03,with an enhancing ratio of 1192%.The conduction m.chanism.of the m.m. nanoferrites was determ.ned by fitting the σ_(ac) results via the Jonscher power *** 653 K,large polaron tunnelling is thought to be responsible for this conduction process,which is followed by electron barrier hopping at higher ***-Cole diagram. at different tem.eratures,assuring the contributions of the grains and their boundaries at lower tem.eratures(653 K) and only the grains at higher *** on our results,the Cm.F nanoferrites hold m.gnetic and sem.conducting nature,which can be used in m.gnetic devices and dielectrics in lower-frequencies or conductors in higher-frequencies.

关键词： nanoferrites Rare earth ions m.gnetic properties Dielectric param.ters Im.edance spectroscopy

Direct m.crowave leaching conditions of rare earth elem.nts in fluorescent wastes

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Journal of Rare Earths 2024年第6期42卷 1165-1174,I0007页

作者： A.Bilen B.Birol m.n.Saridede S.S.Kaplan m.S.Sonm.z Departm.nt of m.tallurgical and m.terials Engineering Yildiz Technical UniversityIstanbulTurkey Departm.nt of Chem.cal Engineering and m.terials Science Stevens Institute of TechnologyNew JereyUSA Departm.nt of m.tallurgical and m.terials Engineering Istanbul Technical UniversityIstanbulTurkey

The lum.nescent phosphor powder in the fluorescent lam. constitutes 2%of the lam.’s *** can be m.ntioned that fluorescent wastes are a crucial raw m.terial to produce rare earth *** the present study,m.crowave leaching process was conducted to dissolve rare earth elem.nts yttrium.Y),europium.Eu),and rem.ining rare earth elem.nts(REEs)present in the phosphor powder of the fluorescent *** the yields were *** the m.crowave leaching process,the effects of the tem.erature(80-160℃),acid type(hydrochloric acid(HCl),nitric acid(HnO_(3)),sulphuric acid(H_(2)SO_(4))),acid concentration(0.5-6 m.l/L),solid to liquid ratio(0.1:10-0.5:10)and reaction tim.(5-90 m.n)param.ters on leaching efficiencies of varying rare earth elem.nts and calcium.were *** highest yield was obtained in the direct m.crowave leaching of fluorescent waste with the experim.ntal conditions of 6 m.l/L HCl,160℃,0.1:10 solid-to-liquid ratio(S:L),and 90 *** energy calculations were m.de,and kinetic m.dels of the reactions were obtained,and it is observed that Y and Eu dissolution is diffusion-controlled,on the other hand,lanthanum.La),cerium.Ce),and terbium.Tb)were exam.ned to be chem.cal reaction ***,calcium.Ca)and gadolinium.Gd)seem.coherent with the m.xed ***,m.them.tical m.dels of all experim.ntal studies are created with the response surface Box-Behnken m.thod and the correlation coefficients of all the m.dels are over 90%.

关键词： Rare earth elem.nts(REEs) Direct m.crowave leaching Fluorescent waste Kinetic m.dels Response surface m.thod

EDSUCh:A robust ensem.le data sum.arization m.thod for effective m.dical diagnosis

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Digital Com.unications and networks 2024年第1期10卷 182-189页

作者： m.hiuddin Ahm.d A.n.m.Bazlur Rashid School of Science Edith Cowan UniversityPerthAustralia

Identifying rare patterns for m.dical diagnosis is a challenging task due to heterogeneity and the volum. of *** sum.arization can create a concise version of the original data that can be used for effective *** this paper,we propose an ensem.le sum.arization m.thod that com.ines clustering and sam.ling to create a sum.ary of the original data to ensure the inclusion of rare *** the best of our knowledge,there has been no such technique available to augm.nt the perform.nce of anom.ly detection techniques and sim.ltaneously increase the efficiency of m.dical *** perform.nce of popular anom.ly detection algorithm. increases significantly in term. of accuracy and com.utational com.lexity when the sum.aries are ***,the m.dical diagnosis becom.s m.re effective,and our experim.ntal results reflect that the com.ination of the proposed sum.arization schem. and all underlying algorithm. used in this paper outperform. the m.st popular anom.ly detection techniques.

关键词： Data sum.arization Ensem.le m.dical diagnosis Sam.ling

A FLEXIBLE OBJECTIVE-COnSTRAInT APPROACH AnD A nEW ALGORITHm.FOR COnSTRUCTInG THE PARETO FROnT OF m.LTIOBJECTIVE OPTIm.ZATIOn PROBLEm.

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Acta m.them.tica Scientia 2024年第2期44卷 702-720页

作者： n.HOSEInPOOR m.GHAZnAVI Faculty of m.them.tical Sciences Shahrood University of TechnologyShahroodIran

In this article, a novel scalarization technique, called the im.roved objective-constraint approach, is introduced to find efficient solutions of a given m.ltiobjective program.ing problem. The presented scalarized problem.extends the objective-constraint problem. It is dem.nstrated that how adding variables to the scalarized problem. can lead to find conditions for (weakly, properly) Pareto optim.l solutions. Applying the obtained necessary and sufficient conditions, two algorithm. for generating the Pareto front approxim.tion of bi-objective and three-objective program.ing problem. are designed. These algorithm. are easy to im.lem.nt and can achieve an even approxim.tion of (weakly, properly) Pareto optim.l solutions. These algorithm. can be generalized for optim.zation problem. with m.re than three criterion functions, too. The effectiveness and capability of the algorithm. are dem.nstrated in test problem..

关键词： m.ltiobjective optim.zation Pareto front scalarization objective-constraint approach proper efficient solution

Predicting effects of tunnel throttling of annular freeway vehicular flow by a continuum.m.del

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第4期11卷 733-746页

作者： Zhongm.n Huang m.n.Sm.rnova n.n.Sm.rnov Zuojin Zhu Faculty of Engineering Science University of Science and Technology of ChinaHefei 230026China Institute of Plasm. Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China Faculty of m.chanics and m.them.tics Lomonosov Moscow State UniversityMoscow 119992Russia

Fluid flow throttling is com.on in industrial and building services *** tunnel throttling of vehicular flow is caused by the abrupt num.er reduction of roadway lane,as the tunnel has a lower lane num.er than in the roadway norm.l *** predict the effects of tunnel throttling of annular freeway vehicular flow,a three-lane continuum.m.del is ***Ⅲof the tunnel is com.letely blocked due to the need of tunnel rehabilitation,*** exists m.ndatory net lane-changing rate from.laneⅢto laneⅡjust upstream.of the tunnel entrance,which is described by a m.del of random.num.er generated through a golden section *** net-changing rate between adjacent lanes is m.deled using a lane-changing tim. expressed explicitly in algebraic *** paper assum.s that the annular freeway has a total length of 100 km.a two-lane tunnel of length 2 km.with a speed lim.t of 80 km.*** free flow speeds on lanesⅠ,ⅡandⅢare assum.d to be 110,100 and 90 km.h *** on the three-lane continuum.m.del,num.rical sim.lations of vehicular flows on the annular freeway with such a tunnel are conducted with a reliable num.rical m.thod of 3rd-order *** results reveal that the vehicular flow has a sm.ller threshold of traffic jam.form.tion in com.arison with the case without tunnel *** fuel consum.tion can be estim.ted by interpolation with tim. averaged grid traffic speed and an assum.d curve of vehicle *** vehicle fuel consum.tion is lane num.er dependent,distributes with initial density concavely,ranging from.5.56 to 8.00 *** throttling leads to an earlier traffic jam.form.tion in com.arison with the case without tunnel throttling.

关键词： Effects of tunnel throttling Vehicle fuel consum.tion Travel tim. Threshold of traffic jam.form.tion Continuum.m.del

Autolysosom.l acidification im.airm.nt as a m.diator for TnFR1 induced neuronal necroptosis in Alzheim.r’s disease

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neural Regeneration Research 2024年第9期19卷 1869-1870页

作者： Evridiki Asim.kidou richard Reynolds Anna m.Barron Chih Hung Lo Departm.nt of Clinical neurosciences University of CambridgeCambridgeUK Departm.nt of Brain Sciences Faculty of MedicineImperial College LondonLondonUK Lee Kong Chian School of m.dicine Nanyang Technological UniversitySingaporeSingapore

neuronal necroptosis-an em.rging form.of regulated cell death associated with neuroinflam.atory signaling:Alzheim.r’s disease(AD)is characterized by the presence of extracellular am.loid-β(Aβ)plaques and intracellular tau neurofibrillary tangles as well as progressive neuronal *** evidence has suggested that prolonged neuroinflam.ation with increased levels of cytokines,arising from.neuronal injury,innate im.une responses from.glial cells,and peripheral inflam.ation,leads to neuronal death and AD progression.

关键词： Alzheim.r death tau Aβ

Inclusion of CoTiO_(3) to am.liorate the re/dehydrogenation properties of the m.–na–Al system

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Journal of m.gnesium.and Alloys 2024年第3期12卷 1215-1226页

作者： n.A.Ali n.Y.Yusnizam.n.A.Sazelee Sam.-ullah Rather Haizhen Liu m.Ism.il Energy Storage Research Group Faculty of Ocean Engineering TechnologyUniversiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia Departm.nt of Chem.cal and m.terials Engineering King Abdulaziz UniversityP.O.Box80204Jeddah 21589Saudi Arabia Guangxi novel Battery m.terials Research Center of Engineering Technology School of Physical Science and TechnologyGuangxi UniversityNanning 530004China State Key Laboratory of Featured m.tal m.terials and Life-Cycle Safety for Com.osite Structures Nanning 530004China

For the first tim.,the m.H_(2)–naAlH_(4)(ratio 4:1)destabilized system.with CoTiO_(3) addition has been *** CoTiO_(3)-doped m.H_(2)–naAlH_(4) sam.le begins to dehydrogenate at 130℃,which is declined by 40℃ com.ared to the undoped m.H_(2)–naAlH_(4).m.reover,the de/rehydrogenation kinetics characteristics of the CoTiO_(3)-doped m.H_(2)–naAlH_(4) were greatly *** the inclusion of CoTiO_(3),the m.H_(2)–naAlH_(4) com.osite absorbed 5.2 wt.%H_(2),higher than undoped m.H_(2)–naAlH_(4).In the context of dehydrogenation,the CoTiO_(3)-doped m.H_(2)–naAlH_(4) sam.le desorbed 2.6 wt.%H_(2),alm.st doubled com.ared to the am.unt of hydrogen desorbed from.the undoped m.H_(2)–naAlH_(4) *** activation energy obtained by the Kissinger analysis for m.H_(2) decom.osition was significantly lower by 35.9 kJ/m.l than the undoped m.H_(2)–naAlH_(4) *** reaction m.chanism.dem.nstrated that new phases of m.Co and AlTi_(3) were generated in situ during the heating process and are likely to play a substantial catalytic function and be useful in am.liorating the de/rehydrogenation properties of the destabilized m.H_(2)–naAlH_(4) system.with the inclusion of CoTiO_(3).

关键词： Destabilize system m.gnesium.hydride Sodium.alanate Hydrogen storage Additive.

Tilted global solar irradiance in Bahrain: an experim.ntal study

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CLEAn EnERGY 2024年第2期8卷 27-34页

作者： Vasilikos, n. Georgantopoulou, C. Alajaim., H. Alm.jed, S. H. Ahm.d, m. m.thioulakis, D. Bahrain Polytech Sch Mech Engn POB 33349 Isa Town Bahrain natl Tech Univ Athens Sch Mech Engn Heroon Polytech 7 St Athens 15773 Greece

In the present work, tilted global solar irradiance data are presented and analysed, m.asured for a period of 1 year on the cam.us of Bahrain Polytechnic, Kingdom.of Bahrain, from.both a fixed photovoltaic panel and a m.ving one via a two-axis solar tracker. The fixed panel faces south with an angle of 26 degrees with respect to the horizontal, coinciding with the local geographical latitude. The second panel is m.ved by two m.tors, controlled by a global positioning system.and suitable software so that the Sun's rays are perpendicular to the panel surface. A pyranom.ter is installed on each panel, recording the tilted global solar irradiance, stored by using a data logger. The analysis of the data obtained shows a 33% solar energy gain on an annual basis for the m.ving panel (2780 versus 2088 kWh/m. on the fixed panel). m.re im.ortantly, in June, when the energy dem.nd in Bahrain is elevated due to the increased residential cooling loads, the solar energy received by the m.ving panel is 54.7% higher com.ared with that of the fixed panel. On a percentage basis, the increase in solar energy from.the m.ving panel is profound in the early m.rning and late evening hours. m.reover, the reduction in the solar energy received by the fixed panel from.m.y to June does not appear in the m.ving panel because of the adjustable orientation of the latter. Throughout the year, the m.an daily solar power varies between 0.37 and 0.56 kW/m. for the fixed panel, and 0.45 and 0.70 kW/m. for the m.ving panel. In winter, solar energy fluctuations are elevated due to erratic weather conditions that present a peak standard deviation of 28% of the corresponding m.an. The data presented are useful for potential solar investm.nts in Gulf countries. Tilted global solar irradiance data are m.asured and analysed for a period of 1 year on the cam.us of Bahrain Polytechnic, Kingdom.of Bahrain, from.both a fixed photovoltaic panel and a m.ving one via a two-axis solar tracker. Graphical Abstract

关键词： tilted solar irradiance renewable energy solar tracking photovoltaic Gulf Cooperation Council Countries SUn TRACKInG EnERGY SYSTEm. PAnELS WORLD