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Tilted.global solar irrad.ance in Bah.ain: an experimental stud.

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CLEAN ENERGy 2024年第2期8卷 27-34页

作者： Vasilikos, N. Georgantopoulou, C. Alajaimi, h. Almajed. S. h. Ah.ed. M. Math.oulakis, d. Bah.ain Polytech Sch Mech Engn POB 33349 Isa Town Bahrain Natl Tech.Univ Ath.ns Sch Mech Engn Heroon Polytech 7 St Athens 15773 Greece

In th. present work, tilted.global solar irrad.ance d.ta are presented.and.analysed. measured.for a period.of 1 year on th. campus of Bah.ain Polytech.ic, Kingd.m of Bah.ain, from both.a fixed.ph.tovoltaic panel and.a moving one via a two-axis solar tracker. Th. fixed.panel faces south.with.an angle of 26 d.grees with.respect to th. h.rizontal, coincid.ng with.th. local geograph.cal latitud.. Th. second.panel is moved.by two motors, controlled.by a global positioning system and.suitable software so th.t th. Sun's rays are perpend.cular to th. panel surface. A pyranometer is installed.on each.panel, record.ng th. tilted.global solar irrad.ance, stored.by using a d.ta logger. Th. analysis of th. d.ta obtained.sh.ws a 33% solar energy gain on an annual basis for th. moving panel (2780 versus 2088 kWh.m2 on th. fixed.panel). More importantly, in June, wh.n th. energy d.mand.in Bah.ain is elevated.d.e to th. increased.resid.ntial cooling load., th. solar energy received.by th. moving panel is 54.7% h.gh.r compared.with.th.t of th. fixed.panel. On a percentage basis, th. increase in solar energy from th. moving panel is profound.in th. early morning and.late evening h.urs. Moreover, th. red.ction in th. solar energy received.by th. fixed.panel from May to June d.es not appear in th. moving panel because of th. ad.ustable orientation of th. latter. Th.ough.ut th. year, th. mean d.ily solar power varies between 0.37 and.0.56 kW/m2 for th. fixed.panel, and.0.45 and.0.70 kW/m2 for th. moving panel. In winter, solar energy fluctuations are elevated.d.e to erratic weath.r cond.tions th.t present a peak stand.rd.d.viation of 28% of th. correspond.ng mean. Th. d.ta presented.are useful for potential solar investments in Gulf countries. Tilted.global solar irrad.ance d.ta are measured.and.analysed.for a period.of 1 year on th. campus of Bah.ain Polytech.ic, Kingd.m of Bah.ain, from both.a fixed.ph.tovoltaic panel and.a moving one via a two-axis solar tracker. Graph.cal Abstract

关键词： tilted.solar irrad.ance renewable energy solar tracking ph.tovoltaic Gulf Cooperation Council Countries SUN TraCKING ENERGy SySTEMS PANelS WORLd

Comparison of Treatment Efficacy of d.fferent Number of Botulinum Toxin Type A Injection Sites for Crow's Feet Lines: A Single-Center Retrospective Clinical Stud. in Vietnam

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International Journal of d.rmatology and.Venereology 2024年第3期7卷 131-136页

作者： Nguyen Quang M. Le Th. M. d.ong Ph.c h. Vu Th.i h. Le h.u d. d.partment of Stem Cell Research.and.Application National Hospital of Dermatology and Venereology Hanoi 100000 Viet Nam d.partment of h.alth.are Activity d.rection National Hospital of Dermatology and Venereology Hanoi 100000 Viet Nam d.partment of d.rmatology Hanoi Medical University Hanoi 100000 Viet Nam

Objective: Botulinum toxin type A is frequently used.to treat crow's feet lines. h.wever, th. optimal d.se and.injection sites are still controversial. Th. objective of th.s stud. was to compare th. efficacy of d.fferent botulinum toxin type A injection patterns for th. treatment of crow's feet. Meth.d.: Th.s single-center, retrospective, clinical stud. was cond.cted.at th. National h.spital of d.rmatology and.Venereology from July 2020 to d.cember 2020. d.ta on 60 patients with.crow's feet were collected.and.d.vid.d.into 2 groups (3- or 4-point intramuscular injection) accord.ng to th. intramuscular injection tech.ique th. patients received. Th. treatment efficacy was assessed.based.on th. ch.nges in th. Crow's Feet Grad.ng Scale score at 1, 4, and.16 weeks after treatment. Repeated.measures analysis of variance was used.for th. assessment of ch.nges in scores over time between th. two groups. Results: After treatment, th. average Crow's Feet Grad.ng Scale score was significantly d.creased.compared.with.th. pretreatment score at all timepoints (1, 4, and.16 weeks) in both.states (d.namic: For 3-point intramuscular injection tech.ique, 1 week: 1.90 ± 0.71 vs. 2.97 ± 0.56; 4 weeks: 1.87 ± 0.68 vs. 2.97 ± 0.56; 16 weeks: 2.60 ± 0.67 vs. 2.97 ± 0.56. For 4-point intramuscular injection tech.ique, 1 week: 1.73 ± 0.83 vs. 3.03 ± 0.49; 4 weeks: 1.73 ± 0.74 vs. 3.03 ± 0.49; 16 weeks: 2.57 ± 0.68 vs. 3.03 ± 0.49, all P d.static: For 3-point intramuscular injection tech.ique, 1 week: 1.20 ± 0.89 vs. 2.20 ± 0.85; 4 weeks: 1.20 ± 0.89 vs. 2.20 ± 0.85; 16 weeks: 1.87 ± 0.97 vs. 2.20 ± 0.85; For 4-point intramuscular injection tech.ique, 1 week: 1.50 ± 0.86 vs. 2.30 ± 0.84; 4 weeks: 1.33 ± 0.84 vs. 2.30 ± 0.84; 16 weeks: 1.87 ± 0.97 vs. 2.30 ± 0.84. All P h. average subjective patient-rated.satisfaction scores after treatment were significantly h.gh.r in th. 4-point injection group th.n in th. 3-point injection group (P = 0.028). Th. ad.erse events were pos

关键词： botulinum toxin type A crow's feet lines d.se injection site

A h.brid.mach.ne-learning mod.l for solar irrad.ance forecasting

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CLEAN ENERGy 2024年第1期8卷 100-110页

作者： Almarzooqi, Ameera M. Maalouf, Mah.r el-Fouly, Tarek h. M. Katzourakis, Vasileios E. el Moursi, Moh.med.S. Ch.ysikopoulos, Constantinos, V Kh.lifa Univ Dept Ind & Syst Engn POB 127788 Abu Dhabi U Arab Emirates Kh.lifa Univ Abu d.0}bi Elect Engn & Comp Sci Dept Abu Dhabi U Arab Emirates Kh.lifa Univ Dept Civil Infrastruct & Environm Engn POB 127788 Abu Dhabi U Arab Emirates Tech.Univ Crete Sch Chem & Environm Engn Khania 73100 Greece

Nowcasting and.forecasting solar irrad.ance are vital for th. optimal pred.ction of grid.connected.solar ph.tovoltaic (PV) power plants. Th.se plants face operational ch.llenges and.sch.d.ling d.spatch.d.fficulties d.e to th. fluctuating nature of th.ir power output. As th. generation capacity with.n th. electric grid.increases, accurately pred.cting th.s output becomes increasingly essential, especially given th. rand.m and.non-linear ch.racteristics of solar irrad.ance und.r variable weath.r cond.tions. Th.s stud. presents a novel pred.ction meth.d.for solar irrad.ance, wh.ch.is d.rectly in correlation with.PV power output, targeting both.sh.rt-term and.med.um-term forecast h.rizons. Our proposed.h.brid.framework employs a fast trainable statistical learning tech.ique based.on th. truncated.regularized.kernel rid.e regression mod.l. Th. proposed.meth.d.excels in forecasting solar irrad.ance, especially d.ring h.gh.y intermittent weath.r period.. A key strength.of our mod.l is th. incorporation of multiple h.storical weath.r parameters as inputs to generate accurate pred.ctions of future solar irrad.ance values in its scalable framework. We evaluated.th. performance of our mod.l using d.ta sets from both.cloud. and.sunny d.ys in Seattle and.Med.ord. USA and.compared.it against th.ee forecasting mod.ls: persistence, mod.fied.24-h.ur persistence and.least squares. Based.on th.ee wid.ly accepted.statistical performance metrics (root mean squared.error, mean absolute error and.coefficient of d.termination), our h.brid.mod.l d.monstrated.superior pred.ctive accuracy in varying weath.r cond.tions and.forecast h.rizons. A novel pred.ction meth.d.for solar irrad.ance, targeting both.sh.rt-term and.med.um-term forecast h.rizons, is proposed.to improve PV power prod.ction. Th. h.brid.framework employs a fast trainable statistical learning tech.ique based.on th. truncated.regularized.kernel rid.e regression mod.l. Graph.cal Abstract

关键词： solar power generation kernel rid.e regression h.brid.mod.l forecasting BATTERy ENERGy-STOraGE POWER PV rad.ATION PREd.CTION CelLS

Ph.tometric and.Spectroscopic Stud. of Ten Low Mass ratio Contact Binary Systems:Orbital Stability,O'Connell Effect and.Infrared.Calcium Line Filling

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Research.in Astronomy and.Astroph.sics 2024年第8期24卷 212-222页

作者： Surjit S.Wad.0}a Ad.m Popowicz raúl Mich.l Petar Kostić Oliver Vince Nick F.h.Toth.ll Ain y.d. h.rta Miroslav d.Filipović Sch.ol of Science Western Sydney UniversityLocked Bag 1797PenrithNSW 2751Australia d.partment of electronics Electrical Engineering and MicroelectronicsSilesian University of TechnologyAkademicka 1644120 GliwicePoland Instituto d. Astronomía UNAM.A.P.87722800 EnsenadaBCMéxico Astronomical Observatory Volgina 711060 BelgradeSerbia

Low mass ratio contact binary systems are more likely to h.ve unstable orbits and.potentially *** ad.ition,such.systems exh.bit ch.racteristics such.as starspots and.h.gh.energy emissions(UV)suggestive of ch.omosph.ric and.magnetic *** curve mod.ling of ten contact binary systems is *** were found.to be of extreme low mass ratio ranging from 0.122 to 0.24 and.th.ee were found.to be potentially unstable and.possible merger *** of th. infrared.calcium absorption lines is a marker of increased.ch.omosph.ric *** use th. available Large Sky Area Multi-Object Fiber Spectroscopic Telescope spectra along with.match.d.stand.rd.spectra(broad.ned.for rotation)to measure th. excess filling of th. central core d.pression flux of th. two main infrared.calcium absorption linesλ8542 and.*** find.th.t all reported.contact binaries h.ve excess filling of th. core flux in th. infrared.calcium *** of th. systems reported.were also observed.by th. Galaxy Evolution Explorer mission and.we find.th.t all th.ee h.ve features of excess ultraviolet emissions furth.r ad.ing evid.nce for increased.ch.omosph.ric activity in low mass ratio contact *** of both.orbital stability and.absorption line filling is d.pend.nt on th. d.termination of geometric and.absolute parameters from ligh. curve *** an insignificant number of contact binary ligh. curves exh.bit th. O’Connell effect,usually attributed.to *** d.scuss th. inclusion of starspots in ligh. curve solutions and.h.w th.y influence th. geometric and.absolute parameters.

关键词： (stars)binaries eclipsing-tech.iques ph.tometric-stars ch.omosph.res

An introd.ctory review of swarm tech.ology for spacecraft on-orbit servicing

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International Journal of Mech.nical System d.namics 2024年第1期4卷 3-21页

作者： el Gh.li Asri Zh.ng h.Zh. d.partment of Mech.nical Engineering York UniversityTorontoOntarioCanada

Th.s review paper presents a compreh.nsive evaluation and.forward.looking perspective on th. und.rexplored.topic of servicing target objects using spacecraft *** targets can be known or unknown,cooperative or uncooperative,and.pose significant ch.llenges in mod.rn space operations d.e to th.ir inh.rent complexity and.*** servicing space objects is vital for active d.bris removal and.broad.r on-orbit servicing tasks such.as satellite maintenance,repair,refueling,orbital assembly,and.*** effort h.s been invested.in th. literature to explore th. servicing of targets using a single *** its ad.antages and.benefits,th.s paper expand. th. d.scussion to encompass a swarm approach.to th. *** review covers various single-spacecraft approach.s and.presents a critical examination of th. existing,alth.ugh.limited.bod. of work d.d.cated.to servicing orbital objects using multiple *** focus is also broad.ned.to includ. some influential stud.es concerning th. ch.racterization,capture,and.manipulation of ph.sical objects by general multiagent systems,a subject with.significant parallels to th. core interest of th.s ***,th.s article also d.lves into th. realm of simultaneous localization and.mapping,h.gh.igh.ing its application with.n close-proximity operations in space,especially wh.n d.aling with.unknown uncooperative *** attention is paid.to th. benefits th.t th.s field.can receive from d.stributed.multiagent ***,an exploration of th. promising field.of swarm robotics is presented.with.an emph.sis on its potential to revolutionize th. servicing of orbital target ***,a survey of general research.d.rectly engaging swarms in th. orbital context is *** review aims to brid.e th. knowled.e gap and.stimulate furth.r research.in th. und.rexplored.d.main of servicing space targets with.spacecraft swarms.

关键词： space robotics on-orbit servicing close-proximity operations guid.nce and.navigation swarm robotics multiagent systems object capture and.manipulation simultaneous localization and.mapping

Ch.nese Expert Consensus on th. d.agnosis and.Treatment of Ad.lt d.rmatomyositis (2022)#

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International Journal of d.rmatology and.Venereology 2024年第3期7卷 163-173页

作者： Cao h. Ch.n A.-J. Cui y. d.ng d.-Q. Gao X.-h. h. y.-L. Kang X.-J. Jin h.-Z. Li C.-X. Li F. Li h.-J. Liao W.-J. Liu X.-M. Lu Q.-J. Lu y. Pan M. Pan W.-h. Sh. X.-M. Sun Q. Tang K.-y. Tao J. Wang y. Xiao T. Zh.ng F.-R. Zh.ng h.-L. d.partment of d.rmatology Ruijin Hospital Affiliated Shanghai Jiao Tong University School of Medicine Shanghai 200025 China d.partment of d.rmatology First Affiliated Hospital of Chongqing Medical University Chongqing 400042 China d.partment of d.rmatology China-Japan Friendship Hospital Beijing 100029 China d.partment of d.rmatology The Second Affiliated Hospital of Kunming Medical University Yunnan Kunming 650101 China d.partment of d.rmatology The First Hospital of China Medical University Liaoning Shenyang 110001 China d.partment of d.rmatology Beijing Chaoyang Hospital Affiliated to Capital Medical University Beijing 100020 China d.partment of d.rmatology and.Venereology People's Hospital of Xinjiang Uygur Autonomous Region Xinjiang Uygur Autonomous Region Urumqi 830001 China d.partment of d.rmatology State Key Laboratory of Complex Severe and Rare Diseases Peking Union Medical College Hospital Chinese Academy of Medical Science Peking Union Medical College Beijing 100730 China d.partment of d.rmatology First Medical Center PLA General Hospital Beijing 100853 China d.partment of d.rmatology Hainan Hospital of PLA General Hospital Hainan Sanya 572013 China d.partment of d.rmatology Xijing Hospital Air Force Medical University Shaanxi Xi'an 710032 China d.partment of d.rmatology Huazhong University of Science and Technology Union Shenzhen Hospital Guangdong Shenzhen 518052 China h.spital for Skin d.seases Institute of Dermatology Chinese Academy of Medical Sciences Peking Union Medical College Jiangsu Nanjing 210042 China d.partment of d.rmatology Jiangsu Province Hospital The First Affiliated Hospital Nanjing Medical University Jiangsu Nanjing 210029 China d.partment of d.rmatology Shanghai Changzheng Hospital Second Affiliated Hospital of Naval Medical University Shanghai 200003 China d.partment of Rh.umatology China-Japan Friendship Hospital Beijing 100029 China d.partment of d.rmatology Qilu Hospital of Shandong Universit

d.rmatomyositis, an id.opath.c inflammatory myopath., is ch.racterized.by d.stinctive skin manifestations, proximal muscle weakness, and.multiple organ involvement and.can be accompanied.by malignancies. To provid. a reference for d.rmatologists and.clinicians in oth.r relevant field. of clinical practice, experts from th. d.rmatology Branch.of th. Ch.na International Exch.nge and.Promotion Association for Med.cal and.h.alth.Care and.th. National Clinical Research.Center for d.rmatologic and.Immunologic d.seases d.veloped.th.s consensus on th. d.agnosis and.treatment of ad.lt d.rmatomyositis using Ch.nese and.international literature and.expert ad.ice. © 2024 Wolters Kluwer h.alth. All righ.s reserved.

关键词： ad.lt clinical protocols d.rmatomyositis d.agnosis expert consensus treatment

Nonlinear bound.ry control problem of h.perbolic systems

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Journal of Control and.d.cision 2024年第1期11卷 73-83页

作者： A.Bouh.med.A.el Kabouss h.Bouzah.r ISTI Lab Ibn Zohr UniversityENSAAgadirMorocco Faculty of sciences Moulay Ismail UniversityMeknesMorocco

Th. paper is d.voted.to th. stud. of optimal control of a h.perbolic system,wh.re th. control enters th. system th.ough.th. *** h.perbolic system is th. wave equation on a smooth.and.open d.main,wh.re th. bound.ry cond.tion involves th. normal d.rivative at th. bound.ry of z,th. time d.rivative of z times a constant k,and.a nonlinear term ***,z is th. state and.u is th. control,satisfying some bound.d.ess cond.tion d.pend.ng on *** functional cost consists of th. energy and.th. d.fference between th. solution of th. system at final time,and.a d.sired.state in *** a closed.convex set,we prove th. existence of an optimal control th.t minimises th. cost functional using a priori ***,using th. d.fferentiability of th. cost functional with.respect to th. control,we establish.th. ch.racterisation by d.riving necessary cond.tions th.t an optimal control must satisfy.A numerical approach.is successfully illustrated.by simulations.

关键词： Non-linear system h.perbolic system bound.ry control optimal control controllability

Experimental valid.tion of d.uble-fed.ind.ction generator in oscillating water column using circulatory system-based.optimization

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CLEAN ENERGy 2024年第2期8卷 127-143页

作者： elnagh., Basem E. Ismaiel, Ah.ed.M. Abd.l-Kad.r, Fath. el Sayed.Moh.mmed. Reh.m h. Abelwh.b, M. N. Suez Canal Univ Elect Power & Machine Dept Ismailia Egypt Menoufia Univ Fac Engn Elect Machine & Power Dept Menoufia Egypt Suez Canal Univ Comp & Control Dept Ismailia Egypt

Th.s paper valid.tes th. optimal operation for a grid.connected.d.uble-fed.ind.ction generator (d.IG) in an oscillating water column power plant (OWCPP). Th.s stud. presents a novel optimization tech.ique called.th. circulatory system-based.optimization (CSBO) approach.to d.velop six ad.ptive fuzzy logic controllers (AFLCs) with.30 parameters and.compare th.m to ch.otic-billiard. optimization (C-BO) and.genetic algorith. (GA). Th. proposed.controller is also compared.with.a proportional-integral d.fferential (PId. controller based.on a self-ad.ptive global-best h.rmony search.(SGh.). CSBO-based.AFLCs are fully investigated.und.r d.fferent scenarios and.experimented.with.using a real-time interface d.P1104. Th. results of using CSBO-AFLCs revealed.a fast time response, fast convergence, less oversh.ot and.minimal error compared.with.th.se ach.eved.with.C-BO-AFLC, SGh.-PId.and.GA-AFLC d.ring d.fferent case stud.es. Th. CSBO-based.AFLCs ensure maximum power from th. d.IG in an OWCPP and.enh.nce d.namic response with.very low errors. Th. results sh.w th.t th. CSBO sh.ws better power tracking by 25% as compared.with.C-BO, by 45% wh.n compared.with.th. GA and.by 56% wh.n compared.with.PId. Moreover, th. integral absolute errors of six controllers are investigated.to d.monstrate th. feasibility of CSBO-AFLC. Th. root mean square of th. errors of six controllers using CSBO is improved.by 68.27% wh.n compared.with.GA, by 22.57% wh.n compared.with.C-BO and.by 38.42% wh.n compared.with.PId. Th.se ind.cators d.monstrate th. feasibility of CSBO wh.n compared.with.oth.r algorith.s with.th. same OWCPP. Th.s paper valid.tes th. optimal operation of a grid.connected.d.uble-fed.ind.ction generator in an oscillating water column using a novel optimization tech.ique called.th. circulatory system-based.optimization approach. Experiments using a real-time simulator d.monstrate th. feasibility of th. approach.wh.n compared.with.oth.r algorith.s. Graph.cal Abstract

关键词： circulatory system-based.optimization approach ad.ptive fuzzy logic controller grid.tied.oscillating water column power plant maximum power point tracking WAVE ENERGy-CONVERSION d.SIGN OPTIMIZATION ALGORITh. CONTROLLER TURBINE

Multiple scales meth.d.for analyzing a forced.d.mped.rotational pend.lum oscillatorwith.allows

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Communications in Th.oretical Ph.sics 2024年第5期76卷 58-67页

作者： h.ifa A Alyousef Alvaro h.Salas B M Alotaibi S A el-Tantawy d.partment of Ph.sics College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia d.partment of Math.matics and.Statistics Universidad Nacional de ColombiaFIZMAKO Research GroupColombia d.partment of Ph.sics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research.Center for Ph.sics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversityAl-Baha 1988Saudi Arabia

Th.s stud. reports th. analytical solution for a generalized.rotational pend.lum system with.gallows and.period.c excited.*** multiple scales meth.d.MSM)is applied.to solve th. proposed.*** types of rotational pend.lum oscillators are stud.ed.and.talked.about in *** includ. th. forced.d.mped.rotating pend.lum oscillator with.gallows,th. d.mped.stand.rd.simple pend.lum oscillator,and.th. d.mped.rotating pend.lum oscillator with.ut *** MSM first-ord.r approximations for all th. cases mentioned.are d.rived.in *** obtained.results are illustrated.with.concrete numerical *** first-ord.r MSM approximations are compared.to th. fourth.ord.r Runge-Kutta(RK4)numerical ***,th. maximum error is estimated.for th. first-ord.r approximations obtained.th.ough.th. MSM,compared.to th. numerical approximations obtained.by th. RK4 ***,we cond.cted.a comparative analysis of th. outcomes obtained.by th. used.meth.d.MSM)and.h.-MSM to ascertain th.ir respective levels of *** proposed.meth.d.can be applied.to analyze many strong nonlinear oscillatory equations.

关键词： rotational pend.lum system multiple scales meth.d approximate solution d.mped.oscillations forced.pend.lum with.gallows h.-multiple scales meth.d