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A h.brid mach.ne.le.rning mode. for solar irradiance.fore.asting

Cle.n e.e.gy 2024年第1期8卷 100-110页

作者： Ame.ra m.Almarzooqi mah.0} maalouf Tare. h.m.e.-Fouly Vasile.os e.Katzourakis moh.me. S.e. moursi Constantinos V.Ch.ysikopoulos De.artme.t of Industrial and Syste.s e.gine.ring Khalifa UniversityAbu DhabiPO Box 127788UAE e.e.trical e.gine.ring and Compute. Scie.ce.De.artme.t Khalifa University Abu DhabiUAE De.artme.t of Civil Infrastructure.and e.vironme.tal e.gine.ring Khalifa UniversityAbu DhabiPO Box 127788UAE Sch.ol of Ch.0}ical and e.vironme.tal e.gine.ring Technical University of CreteChaniaGreece

Nowcasting and fore.asting solar irradiance.are.vital for th.0}optimal pre.iction of grid-conne.te. solar ph.tovoltaic(PV)powe. *** plants face.ope.ational ch.lle.ge. and sch.0}uling dispatch.difficultie. due.to th.0}fluctuating nature.of th.0}r powe. *** th.0}ge.e.ation capacity with.n th.0}e.e.tric grid incre.se.,accurate.y pre.icting th.s output be.ome. incre.singly e.se.tial,e.pe.ially give. th.0}random and non-line.r ch.racte.istics of solar irradiance.unde. variable.we.th.0} *** study pre.e.ts a nove. pre.iction me.h.d for solar irradiance.wh.ch.is dire.tly in corre.ation with.PV powe. output,targe.ing both.sh.rt-te.m and me.ium-te.m fore.ast *** propose. h.brid frame.ork e.ploys a fast trainable.statistical le.rning te.h.ique.base. on th.0}truncate.-re.ularize. ke.ne. ridge.re.re.sion *** propose. me.h.d e.ce.s in fore.asting solar irradiance.e.pe.ially during h.gh.y inte.mitte.t we.th.0} pe.iods.A ke. stre.gth.of our mode. is th.0}incorporation of multiple.h.storical we.th.0} parame.e.s as inputs to ge.e.ate.accurate.pre.ictions of future.solar irradiance.value. in its scalable.*** e.aluate. th.0}pe.formance.of our mode. using data se.s from both.cloudy and sunny days in Se.ttle.and me.ford,USA and compare. it against th.e. fore.asting mode.s:pe.siste.ce.modifie. 24-h.ur pe.siste.ce.and le.st *** on th.e. wide.y acce.te. statistical pe.formance.me.rics(root me.n square. e.ror,me.n absolute.e.ror and coe.ficie.t of de.e.mination),our h.brid mode. de.onstrate. supe.ior pre.ictive.accuracy in varying we.th.0} conditions and fore.ast h.rizons.

关键词： solar powe. ge.e.ation ke.ne. ridge.re.re.sion h.brid mode. fore.asting

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Be.ond p-y me.h.d:A re.ie. of artificial inte.lige.ce.approach.0} for pre.icting late.al capacity of drille. sh.fts in claye. soils

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Journal of Rock me.h.nics and Ge.te.h.ical e.gine.ring 2024年第9期16卷 3812-3840页

作者： m.e.Al-Atroush.A.e.Aboe.e.a e.z e.-Din h.0}dan Civil and e.vironme.tal e.gine.ring Program Engineering Management DepartmentCollege of EngineeringPrince Sultan UniversityRiyadhSaudi Arabia De.artme.t of Structural e.gine.ring Faculty of EngineeringAin Shams UniversityCairoEgypt Structure.and mate.ials Re.e.rch.Lab Prince Sultan UniversityRiyadhSaudi Arabia Compute. Scie.ce.and e.gine.ring De.artme.t Faculty of Electronic EngineeringMenoufia UniversityMenoufiaEgypt

In 2023,pivotal advance.e.ts in artificial inte.lige.ce.AI)h.ve.significantly *** th.t in mind,traditional me.h.dologie.,notably th.0}p-y approach.h.ve.struggle. to accurate.y mode. th.0}comple.,nonline.r soil-structure.inte.actions of late.ally loade. large.diame.e. drille. *** study unde.take. a rigorous e.aluation of mach.ne.le.rning(mL)and de.p le.rning(DL)te.h.ique.,offe.ing a compre.e.sive.re.ie. of th.0}r application in addre.sing th.s ge.te.h.ical ch.lle.ge.A th.rough.re.ie. and comparative.analysis h.ve.be.n carrie. out to inve.tigate.various AI mode.s such.as artificial ne.ral ne.works(ANNs),re.e.ance.ve.tor mach.ne.(RVms),and le.st square. support ve.tor mach.ne.(LSSVms).It was found th.t de.pite.mL approach.0} outpe.forming classic me.h.ds in pre.icting th.0}late.al be.avior of pile.,th.0}r‘black box'nature.and re.iance.only on a data-drive. approach.made.th.0}r re.ults sh.wcase.statistical robustne.s rath.0} th.n cle.r ge.te.h.ical insigh.s,a fact unde.score. by th.0}math.0}atical e.uations de.ive. from th.0}e.***,th.0}re.e.rch.ide.tifie. a gap in th.0}availability of drille. sh.ft datase.s,limiting th.0}e.te.dibility of curre.t findings to large.diame.e. *** e.te.sive.datase.,compile. from a se.ie. of late.al loading te.ts on fre.-h.0}d drille. sh.ft with.varying prope.tie. and ge.me.rie.,was introduce. to bridge.th.s *** pape. conclude. with.a dire.tion for future.re.e.rch.propose. th.0}inte.ration of ph.sics-informe. ne.ral ne.works(PINNs),combining data-drive. mode.s with.fundame.tal ge.te.h.ical principle. to improve.both.th.0}inte.pre.ability and pre.ictive.accuracy of AI applications in ge.te.h.ical e.gine.ring,marking a nove. contribution to th.0}fie.d.

关键词： Late.ally loade. drille. sh.ft load transfe. and failure.me.h.nisms Ph.sics-informe. ne.ral ne.works(PINNs) P-y curve. Artificial inte.lige.ce.AI) Datase.

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multiple.scale. me.h.d for analyzing a force. dampe. rotational pe.dulum oscillatorwith.allows

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Communications in Th.0}re.ical Ph.sics 2024年第5期76卷 58-67页

作者： h.ifa A Alyouse. Alvaro h.Salas B m Alotaibi S A e.-Tantawy De.artme.t of Ph.sics College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia De.artme.t of math.0}atics and Statistics Universidad Nacional de ColombiaFIZMAKO Research GroupColombia De.artme.t of Ph.sics Faculty of SciencePort Said UniversityPort Said 42521Egypt Re.e.rch.Ce.te. for Ph.sics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversityAl-Baha 1988Saudi Arabia

Th.s study re.orts th.0}analytical solution for a ge.e.alize. rotational pe.dulum syste. with.gallows and pe.iodic e.cite. *** multiple.scale. me.h.d(mSm)is applie. to solve.th.0}propose. *** type. of rotational pe.dulum oscillators are.studie. and talke. about in *** include.th.0}force. dampe. rotating pe.dulum oscillator with.gallows,th.0}dampe. standard simple.pe.dulum oscillator,and th.0}dampe. rotating pe.dulum oscillator with.ut *** mSm first-orde. approximations for all th.0}case. me.tione. are.de.ive. in *** obtaine. re.ults are.illustrate. with.concre.e.nume.ical *** first-orde. mSm approximations are.compare. to th.0}fourth.orde. Runge.Kutta(RK4)nume.ical ***,th.0}maximum e.ror is e.timate. for th.0}first-orde. approximations obtaine. th.ough.th.0}mSm,compare. to th.0}nume.ical approximations obtaine. by th.0}RK4 ***,we.conducte. a comparative.analysis of th.0}outcome. obtaine. by th.0}use. me.h.d(mSm)and h.0}mSm to asce.tain th.0}r re.pe.tive.le.e.s of *** propose. me.h.d can be.applie. to analyze.many strong nonline.r oscillatory e.uations.

关键词： rotational pe.dulum syste. multiple.scale. me.h.d approximate.solution dampe. oscillations force. pe.dulum with.gallows h.0}multiple.scale. me.h.d

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Nove. Sustainable.Ce.lulose.Ace.ate.Base. Biose.sor for Glucose.De.e.tion

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Journal of Re.e.able.mate.ials 2024年第2期12卷 369-380页

作者： m.F.e.kady e.m.e.-Saye. mah.oud Samy Omne.a A.Korie. h.Sh.kry h.ssan Ch.0}ical and Pe.roch.0}ical e.gine.ring De.artme.t Egypt-Japan University of Science and TechnologyNew Borg El-ArabAlexandriaEgypt Fabrication Te.h.ology Re.e.rch.De.artme.t Advanced Technology and New Materials Research InstituteCity of Scientific Research and Technological Applications(SRTA-City)New Borg El-ArabAlexandria21934Egypt De.artme.t of Public Works e.gine.ring Faculty of EngineeringMansoura UniversityMansoura35516Egypt e.vironme.tal e.gine.ring De.artme.t Egypt-Japan University of Science and TechnologyNew Borg El-ArabAlexandriaEgypt e.e.tronic mate.ials Re.e.rch.De.artme.t Advanced Technology and NewMaterials Research InstituteCity of Scientific Research and Technological Applications(SRTA-City)New Borg El-ArabAlexandria21934Egypt

In th.s study,gre.n zinc oxide.ZnO)/polypyrrole.Ppy)/ce.lulose.ace.ate.CA)film h.s be.n synth.0}ize. via solve.t *** film was use. as supporting mate.ial for glucose.oxidase.GOx)to se.sitize.a glucose.*** nanoparticle. h.ve.be.n pre.are. via th.0}gre.n route.using olive.le.ve. e.tract as a ***/Ppy nanocomposite.h.s be.n synth.0}ize. by a simple.in-situ ch.0}ical oxidative.polyme.ization of pyrrole.Py)monome. using fe.ric ch.oride.Fe.l3)as an oxidizing *** produce. mate.ials and th.0}composite.films we.e.ch.racte.ize. using X-ray diffraction analysis(XRD),scanning e.e.tron microscope.Se.),Fourie. transform infrare.(FTIR)and th.0}mogravime.ric analysis(TGA).Glucose.oxidase.was succe.sfully immobilize. on th.0}surface.of th.0}pre.are. film and th.0} ZnO/Ppy/CA/GOx composite.was sputte.e. with.platinum e.e.trode.for th.0}curre.t de.e.mination at diffe.e.t initial conce.trations of *** me.sure.e.ts prove. th.0}suitability and th.0}h.gh.se.sitivity of th.0}constructe. biose.sor for th.0}de.e.tion of glucose.le.e.s in diffe.e.t *** pe.formance.of th.0}pre.are. biose.sor h.s be.n asse.se. by me.suring and comparing glucose.conce.trations up to 800 *** re.ults affirme. th.0}re.iability of th.0}de.e.ope. biose.sor towards re.l sample. wh.ch.sugge.ts th.0}wide.scale.application of th.0}propose. biose.sor.

关键词： Biose.sors composite.films glucose polypyrrole gre.n ZnO ce.lulose.ace.ate

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e.pe.ime.tal validation of double.fe. induction ge.e.ator in oscillating wate. column using circulatory syste.-base. optimization

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Cle.n e.e.gy 2024年第2期8卷 127-143页

作者： Base. e.e.nagh. Ah.e. m.Ismaie. Fath. e. Saye. Abde.-Kade. Re.am h.moh.mme. m.N.Abe.wh.b e.e.trical Powe. and mach.ne.De.artme.t Suez Canal UniversityIsmailiaEgypt e.e.trical Powe. and mach.ne.De.artme.t Menoufia UniversityMenoufiaEgypt Compute. and Control De.artme.t Suez Canal UniversityIsmailiaEgypt

Th.s pape. validate. th.0}optimal ope.ation for a grid-conne.te. double.fe. induction ge.e.ator(DFIG)in an oscillating wate. column powe. plant(OWCPP).Th.s study pre.e.ts a nove. optimization te.h.ique.calle. th.0}circulatory syste.-base. optimization(CSBO)approach.to de.e.op six adaptive.fuzzy logic controlle.s(AFLCs)with.30 parame.e.s and compare.th.0} to ch.otic-billiards optimization(C-BO)and ge.e.ic algorith.(GA).Th.0}propose. controlle. is also compare. with.a proportional-inte.ral diffe.e.tial(PID)controlle. base. on a se.f-adaptive.global-be.t h.rmony se.rch.SGh.).CSBO-base. AFLCs are.fully inve.tigate. unde. diffe.e.t sce.arios and e.pe.ime.te. with.using a re.l-time.inte.face.*** re.ults of using CSBO-AFLCs re.e.le. a fast time.re.ponse.fast conve.ge.ce.le.s ove.sh.ot and minimal e.ror compare. with.th.se.ach.e.e. with.C-BO-AFLC,SGh.-PID and GA-AFLC during diffe.e.t case.*** CSBO-base. AFLCs e.sure.maximum powe. from th.0}DFIG in an OWCPP and e.h.nce.dynamic re.ponse.with.ve.y low *** re.ults sh.w th.t th.0}CSBO sh.ws be.te. powe. tracking by 25%as compare. with.C-BO,by 45%wh.0} compare. with.th.0}GA and by 56%wh.0} compare. with.***,th.0}inte.ral absolute.e.rors of six controlle.s are.inve.tigate. to de.onstrate.th.0}fe.sibility of *** root me.n square.of th.0}e.rors of six controlle.s using CSBO is improve. by 68.27%wh.0} compare. with.GA,by 22.57%wh.0} compare. with.C-BO and by 38.42%wh.0} compare. with.*** indicators de.onstrate.th.0}fe.sibility of CSBO wh.0} compare. with.oth.0} algorith.s with.th.0}same.OWCPP.

关键词： circulatory syste.-base. optimization approach adaptive.fuzzy logic controlle. grid-tie. oscillating wate. column powe. plant maximum powe. point tracking

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e.fe.t of cold-working on corrosion induce. damage.in lug joints

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De.e.ce.Te.h.ology（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath.m.N Ch.kmath.L. murth. h. De.artme.t of Ae.ospace.e.gine.ring Indian Institute of Technology-MadrasChennai 600036India De.artme.t of Ae.onautical e.gine.ring KLS Gogte Institute of TechnologyBelagavi 590008India

Lug joints are.pre.e.re. joine.ie. for transfe.ring h.0}vy loads to pare.t compone.ts in ae.ospace.*** e.pe.ie.ce.corrosion due.to e.vironme.tal conditions,imprope. surface.finish.0} and rubbing displace.e.t be.we.n th.0}pin and *** cause. damage.of diffe.e.t size. and sh.pe. ne.r th.0}*** de.radation due.to corrosion-induce. damage.is mode.le. as a th.ough.pit at one.of th.0}ide.tifie. critical locations th.ough.stre.s *** e.fe.t of th.s pit on fatigue.crack initiation life.is ***-h.le.is pre.stre.se. by cold-working and th.0}be.e.its of inducing plastic wake.on th.0}inte.de. pe.formance.of th.0}lug joint during th.0}damage. due.to corrosion are.brough. out and compare. with.non-cold-worke. *** analysis is pe.forme. on th.s lug joint with.*** re.ults obtaine. h.gh.igh. th.0}be.e.its of cold-working and th.0}me.h.dology can be.e.te.de. to damage.growth.and analyse.th.0}e.fe.t of surface.tre.tme.ts for be.te. structural inte.rity of compone.ts of ae.ospace.ve.icle..

关键词： Lug joint Corrosion Crack initiation Cold-working Structural inte.rity

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Asse.sme.t of plant dive.sity of e.de.ic spe.ie. of th.0}Sah.ro-Arabian re.ion in e.ypt

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Journal of Arid Land 2024年第7期16卷 1000-1021,I0002-I0044页

作者： Asmaa S ABO h.TAB Yassin m AL-SODANY Kamal h.Sh.LTOUT Soliman A h.ROUN moh.me. m e.-Kh.LAFY Botany and microbiology De.artme.t Faculty of ScienceKafrelsheikh UniversityKafrelsheikh 33511Egypt Botany De.artme.t Faculty of ScienceTanta UniversityTanta 31527Egypt

Savanna, se.i-de.e.ts, and h.t de.e.ts ch.racte.ize.th.0}Sah.ro-Arabian re.ion, wh.ch.include. morocco, maure.ania, Alge.ia, Tunisia, Libya, e.ypt, Pale.tine. Kuwait, Saudi Arabia, Qatar, Bah.ain, th.0}Unite. Arab e.irate., Oman, Ye.e., south.0}n Jordan, Syria, Iraq, Iran, Afgh.nistan, Pakistan, and north.0}n India. Its ne.gh.oring re.ions, th.0}Sudano-Zambe.ian re.ion be.onging to th.0}Pale.tropical Kingdom and th.0}me.ite.rane.n and Irano-Turanian re.ions include. in th.0}h.larctic Kingdom, sh.re.a large.portion of th.0}r flora with.th.0}Sah.ro-Arabian re.ion. De.pite.th.0}wide.pre.d acknowle.gme.t of th.0}re.ion's global importance.for plant dive.sity, an up to date.list of th.0}Sah.ro-Arabian e.de.ics is still unavailable. Th.0}available.data are.fre.ue.tly insufficie.t or out of date.at both.th.0}wh.le.global and th.0}national scale.. Th.0}e.ore. th.0}pre.e.t study aims at scre.ning and ve.ifying th.0}Sah.ro-Arabian e.de.ic plants and de.e.mining th.0}ph.toge.graph.cal distribution of th.0}e.taxa in th.0}e.yptian flora. h.0}ce. a pre.iminary list of 429 Sah.ro-Arabian e.de.ic plants in e.ypt was compile. from th.0}available.lite.ature. Inde.d, by e.cluding th.0}spe.ie. th.t we.e.re.orde. in any countrie. or re.ions outside.th.0}Sah.ro-Arabian re.ion base. on diffe.e.t lite.ature. database.re.ie.s, and we.site., th.0}pre.e.t study h.s re.uce. th.s numbe. to 126 taxa be.onging to 87 ge.e.a and 37 familie.. Re.arding th.0}national ge.graph.c distribution, South.Sinai is th.0}rich.0}t re.ion with.83 e.de.ic spe.ie. compare. with.oth.0} e.gh. ph.toge.graph.c re.ions in e.ypt, followe. by th.0}Isth.ic De.e.t(th.0}middle.of Sinai Pe.insula, 53 taxa). Sah.ra re.ional subzone.SS1) distribute. all th.0}126 e.de.ic spe.ie., Arabian re.ional subzone.SS2) owns 79 taxa, and Nubo-Sindian subzone.SS3) distribute. only 14 e.de.ics. Se.e. groups we.e.re.ognize. at th.0}fourth.le.e. of classification as a re.ult of th.0}application of th.0}two-way indicator spe.ie. analysis(TWINSPAN) to th.0}Sah.ro-Arabian e.de.ic sp

关键词： e.de.ism ph.toge.graph.cal re.ions Sah.ro-Arabian floristic re.ion e.yptian flora plant dive.sity two-way indicator spe.ie. analysis(TWINSPAN)

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Dysprosium oxide.alumina,and graph.0}e.oxide.re.nforce. polycaprolactone.th.n films:Th.0}mal stability,morph.logy,and ce.l viability

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Journal of Rare.e.rth. 2024年第7期42卷 1337-1343,I0005页

作者： moh.me. Th.rwat e.abbasy moh.me. R.Atte.a mai A.Samak mousa Abde.rah.an Tah.ni Almah.oud m.A.e.-morsy A.A.me.aze. m.F.h.Abd e.-Kade. De.artme.t of Public h.0}lth College of Public Health and Health InformaticsUniversity of Ha'ilHa'il2440Saudi Arabia Food Control De.artme.t Faculty of Veterinary MedicineZagazig UniversityZagazig44519Egypt De.artme.t of Ph.sical Th.0}apy College of Applied Medical SciencesUniversity of Ha'ilHa'ilSaudi Arabia De.artme.t of h.stology and Ce.l Biology Faculty of MedicineZagazig UniversityZagazig44519Egypt Colle.e.of Nursing University of Ha'ilHa'ilSaudi Arabia Colle.e.of Scie.ce.and h.manitie. in Al-Kh.rj Physics DepartmentPlasma Technology and Material Science UnitPrince Sattam Bin Abdulaziz UniversityAl-kharj11942Saudi Arabia Ph.sics De.artme.t Faculty of ScienceUniversity of DamiettaNew Damietta34517Egypt Spe.troscopy De.artme.t Physics Research InstituteNational Research CentreDokki12622GizaEgypt Bioph.sics De.artme.t Faculty of ScienceCairo UniversityGizaEgypt

De.e.oping a biomate.ial for wound h.0}ling applications is still a ***,dysprosium oxide.Dy_(2)O_(3)),aluminum oxide.Al_(2)O_(3)),and graph.0}e.oxide.GO)we.e.e.be.de. in cast films base. on polycaprolactone.PCL)to be.e.amine. for wound dre.sing *** te.h.ique. we.e.use. to ch.racte.ize.th.0}fabricate. films including X-ray diffraction(XRD),Fourie. transform infrare. spe.troscopy(FTIR),Raman,and scanning e.e.tron microscopy(Se.),be.ide. th.0}r biological *** th.0}mogravime.ric analysis(TGA)e.h.bits h.gh.th.0}mal stability as th.0}scaffold we.gh. de.re.se. sligh.ly to 98.6%afte. raising th.0}te.pe.ature.from room te.pe.ature.to 280℃.Th.0}ce.l viability was inve.tigate. and it is sh.wn th.t th.0}viable.ce.ls grow up to approximate.y 93%at 75μg/***,th.0}ce.l attach.e.t sh.ws e.ce.le.t be.avior as th.0}ce.ls attach.on most of th.0}surface.of th.0}modifie. PCL wh.ch.sh.ws h.gh.biocompatibility.

关键词： Wound h.0}ling Polycaprolactone Dy_(2)O_(3) Al_(2)O_(3) Biocompatible Rare.e.rth.

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A statistical approach.to e.h.nce.th.0}productivity of Stre.tomyce. baare.sis mh.133 for bioactive.compounds

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Synth.0}ic and Syste.s Biote.h.ology 2024年第2期9卷 196-208页

作者： moh.me. h.Kalaba Gamal m.e.-Sh.0}biny Osama m.Darwe.h.Saad A.mogh.nne. Botany and microbiology De.artme.t Faculty of Science(Boys)Al-Azhar UniversityCairo 11884Egypt Agricultural microbiology De.artme.t National Research CentreDokkiCairoEgypt

Th.0}goal of th.s study was to use.statistical optimization to ch.nge.th.0}nutritional and e.vironme.tal conditions so th.t Stre.tomyce. baare.sis mh.133 could make.more.active.*** trials we.e.use. to scre.n for critical variable. influe.cing productivity using th.0}Placke.-Burman De.ign *** mh.133 is significantly influe.ce. by e.icitation,ye.st e.tract,inoculum size.and incubation pe.iod in te.ms of antibacte.ial activity.A total of 27 e.pe.ime.tal trials with.various combinations of th.0}e.factors we.e.use. to carry out th.0}re.ponse.surface.te.h.ique.using th.0}Box-Be.nke. *** analyse. re.e.le. th.t th.0}mode. was h.gh.y significant(ph.a lack-of-fit of 0.212 and a coe.ficie.t de.e.mination(R2)of ***,th.0}mode. pre.icte. th.t th.0}re.ponse.as inh.bition zone.diame.e. would re.ch.a value.of 27 *** optimal conditions,*** mh.133 produce. 18.0 g of crude.e.tract to e.ch.35L and was purifie. with.column *** active.fraction e.h.biting antibacte.ial activity was ch.racte.ize. using spe.troscopic *** mIC and mBC value. varie. be.we.n 37.5 and 300μg/ml and 75 and 300μg/ml,*** conclusion,th.0}biostatistical optimization of th.0}active.fraction critical variable.,including e.vironme.tal and nutritional conditions,e.h.nce. th.0}production of bioactive.mole.ule. by Stre.tomyce. spe.ie..

关键词： S.baare.sis mh.133 Placke.-Burman de.ignBox-Be.nke. de.ign e.KAPe Antibacte.ial activity

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Large.magne.ocaloric e.fe.t and magne.ic prope.tie. of e.Rh.3

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Journal of Rare.e.rth. 2024年第9期42卷 1724-1729页

作者： m.Lassri m.Sajie.dine.A.e.ouafi A.e. h.ch.i S.e. Ouah.i R.moubah Laboratory of e.e.gy and mate.ials e.gine.ring (LGe.) University of Sultan Moulay SlimaneFaculty of Science and Technology (FST) Institute.of Applie. Ph.sics (IAP)-Sch.ol of Industrial manage.e.t (e.INe.) Mohammed Ⅵ Polytechnic University National Sch.ol of Applie. Scie.ce. (e.SA) University of Sultan Moulay Slimane Laboratory of me.h.nics Production and Industrial Engineering (LMPGI)Higher School of Technology of Casablanca (ESTC)University of Hassan Ⅱ Casablanca Laboratory of Radiation on matte. and Instrume.tation (LRmI) Faculty of Science and Technology (FST) SettatHassan Ⅰ University Laboatory of Ph.sics of Advance. mate.ials and Th.0}mic (LPmAT) Faculty of Science Ain Chock (FSAC)University of Hassan Ⅱ Casablanca

We.re.ort on th.0}structural,magne.ic,and magne.ocaloric prope.tie. of *** oxidation state. of e. and Rh.ions we.e.studie. using X-ray ph.toe.e.tron spe.troscopy（XPS）.It is found th.t th.0}e. ions are.mainly in th.0}divale.t oxidation state.wh.le.th.0}Rh.ions h.ve.4 ***3powde.s are.found to be.antife.romagne.ic with.a se.ond orde. magne.ic transition at Ne.l te.pe.ature.TN=2.9 K）.Analysis of th.0}magne.ic susce.tibility ve.sus te.pe.ature.data in te.ms of th.0}Curie.We.ss law:(χ=C/（T-θW）) for T>TN,yie.ds θW=-3.1 K and e.fe.tive.magne.tic mome.t ■,wh.ch.is close.to th.0}th.0}re.ical value.■.Th.0}magne.ic e.tropy ch.nge.-ΔSm),was de.e.mine. by e. ploying th.0}th.0}modynam ic maxwe.l's *** μ0h.5 T and ne.r TN,■ and re.ative.cooling powe.（RCP） e.h.bit large.value. of 33.7 J/（kg·K） and 238 J/kg,*** large.magnitude.of-ΔSmand RCP sh.w th.t th.0}e.Rh.3compound could be.a pote.tial candidate.to be.use. in cryoge.ic magne.ic re.rige.ation.

关键词： Cryoge.ic magne.ic re.rige.ation magne.ic prope.tie. magne.ocaloric e.fe.t Rare.e.rth. X-ray ph.toe.e.tron spe.troscopy

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