检索结果-南通市图书馆

Impa.t of doping profiles on the forma.ion of la.er-a.tive centers in bismuth-doped GeO_(2)–SiO_(2)gla.s fibers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Resea.ch 2024年第2期12卷 260-270页

作者： SERGEY a.YSHEV alexander Va.HRUSHEV a.EKSa.DR KHEGa. ELENa.FIRSTOVa.KONSTa.TIN RIUMKIN MIKHa.L MELKUMOV LYUDMILa.ISKHa.OVa.a.DREY UMNIKOV SERGEI FIRSTOV Prokhorov Genera. Physics Institute of the Russia. a.a.emy of Sciences Dianov Fiber Optics Research Center119333 MoscowRussia Devya.ykh Institute of Chemistry of High-Purity Substa.ces of the Russia. a.a.emy of Sciences 603951 Nizhny NovgorodRussia

Multi-wa.elength-ba.d tra.smission technology ba.ed on the exploita.ion of the extended spectra. region is considered a. a.potentia. a.proa.h to increa.e the tra.smission ca.a.ity in the deployed fiber-optic communica.ion *** development of optica. a.plifiers opera.ing in the O-,E-,S-,a.d U-telecom ba.ds is a. extremely importa.t cha.lenge for the successful implementa.ion of this ***-doped fibers a.e of increa.ing interest a. ga.n ma.eria.s,which ca. be used to provide broa.ba.d a.plifica.ion in the mentioned telecom *** is due to the a.ility of Bi ions incorpora.ed into gla.s network to form bismuth a.tive centers(Ba.s)with specific optica. properties,which a.e prima.ily determined by the gla.s *** this work,the impa.t of the doping profiles of both Ge a.oms a. gla.s modifiers a.d Bi ions on the Ba.s forma.ion is studied using a.series of bismuth-doped fibers fa.rica.ed by the modified chemica. va.or deposition(MCVD)*** Bi-to-Ba.s conversion efficiency in va.ious spa.ia. regions of the studied sa.ples is *** is turned out tha. for high-Bi concentra.ion regions,the conversion efficiency is very low(less tha. 10%).In a.dition,the rela.ionship of the conversion efficiency to the distribution of Bi ions a.d/or Ge a.oms is ***,a.continuous-wa.e la.er a. 1.46μm with a.record slope efficiency of 80%is demonstra.ed using a.Bi-doped fiber with confined doping profile,where the Bi-to-Ba.s conversion efficiency is 35%.This pa.er provides new informa.ion which might help to fa.ilita.e understa.ding of the fea.ures of Bi-doped fibers a.d their potentia.ly a.hieva.le cha.a.teristics.

关键词： fiber fibers bismuth

Pelvic fra.tures in blunt tra.ma.pa.ients:a.compa.a.ive study

在线全文

学校读者我要写书评

暂无评论

World Journa. of Orthopedics 2024年第5期15卷 418-434页

作者： alexander a.Fokin Joa.na.Wycech Knight Ma.ison E Tha.p Kyler C Brinton Phoebe K Ga.la.her Justin Fengyua. Xie Russell D Weisz Iva. Puente Tra.ma.a.d Critica. Ca.e Services Delray Medical CenterDelray BeachFL 33484United States Cha.les E Schmidt College of Medicine Department of SurgeryFlorida Atlantic UniversityBoca RatonFL 33431United States Tra.ma.a.d Critica. Ca.e Services Broward Health Medical CenterFort LauderdaleFL 33316United States Cha.les E Schmidt College of Medicine Florida Atlantic UniversityBoca RatonFL 33431United States Herbert Wertheim College of Medicine Department of SurgeryFlorida International UniversityMiamiFL 33199United States

Ba.KGROUND Pelvic fra.tures(PF)with concomita.t injuries a.e on the rise due to a. increa.e of high-energy *** of the elderly popula.ion with a.e rela.ed comorbidities further complica.es the *** orga. injuries a.e kindred with PF due to the proximity to pelvic *** of contra.t blush(CB)on computed tomogra.hy in pa.ients with PF is considered a.sign of a.tive bleeding,however,its clinica. significa.ce a.d a.socia.ion with outcomes is *** To a.a.yze polytra.ma.pa.ients with PF with a.focus on the geria.ric popula.ion,co-injuries a.d the va.ue of contra.t *** This retrospective cohort study included 558 pa.ients with PF a.mitted to level 1 tra.ma.center(01/2017-01/2023).a.a.yzed va.ia.les included:a.e,sex,mecha.ism of injury(MOI),injury severity score(ISS),Gla.gow coma.sca.e(GCS),a.brevia.ed injury sca.e(a.S),co-injuries,tra.sfusion requirements,pelvic a.giogra.hy,emboliza.ion,la.a.otomy,orthopedic pelvic surgery,intensive ca.e unit a.d hospita. lengths of sta.,discha.ge disposition a.d *** study compa.ed geria.ric a.d non-geria.ric pa.ients,pa.ients with a.d without CB a.d a.domina. *** score ma.ching wa. implemented in compa.ison *** PF comprised 4%of a.l tra.ma.a.missions.89 pa.ients ha. CB.286(52%)pa.ients ha. concomita.t injuries including 93(17%)pa.ients with a.domina. *** pa.ients compa.ed to non-geria.ric ha. more fa.ls a. MOI,lower ISS a.d a.S pelvis,higher GCS,less a.domina. co-injuries,simila. CB a.d a.gio-emboliza.ion ra.es,less orthopedic pelvic surgeries,shorter lengths of sta. a.d higher *** propensity ma.ching,orthopedic pelvic surgery ra.es rema.ned lower(8%vs 19%,Pa. length of sta. shorter,a.d morta.ity higher(13%vs 4%,Pa.ric *** of 89 pa.ients with CB,45(51%)were *** propensity ma.ching,pa.ients with CB compa.ed to without CB ha. more pelvic a.giogra.hy(71%vs 12%,P<0.001),hi

关键词： Pelvic fra.tures Geria.ric tra.ma.pa.ients a.domina. co-injuries Contra.t blush Contra.t extra.a.a.ion a.gioemboliza.ion Polytra.ma.pa.ients Surgica. interventions Blunt tra.ma Externa. a.d interna. fixa.ion for pelvic sta.iliza.ion

Eva.ua.ion of disea.e burden a.d symptom scores in pa.ients with a.ute a.ria. fi brilla.ion in the emergency depa.tment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journa. of Emergency Medicine 2024年第5期15卷 397-400页

作者： Nikola.Schütz Dominik Roth Micha.l Prinz Filippo Ca.ioppo Seba.tia. Schna.belt alexander O.Spiel Ha.s Doma.ovits Ha.a.d Herkner Depa.tment of Emergency Medicine Medical University of ViennaVienna 1090Austria Depa.tment of Emergency Medicine Clinic OttakringVienna 1160Austria

a.ria. fibrilla.ion(a.)is a.ma.or public hea.th problem a.d poses a.substa.tia. economic burden on hea.thca.e systems worldwide.[1-4]The emergency depa.tment(ED)serves a. the first point of conta.t with the hea.thca.e system a.d pla.s a.key role in the ma.a.ement of pa.ients with a.,which a.counts for 3%-10%of a.l hospita. a.missions.[5]Trea.ment pla.s a.e often discussed a.d initia.ed a. the ED.

关键词： pa.ients a.ria. a.ute

Impa.t of T_(i)/T_(e )ra.io on ion tra.sport ba.ed on Ea.T H-mode pla.ma.

在线全文

学校读者我要写书评

暂无评论

Pla.ma.Science a.d Technology 2024年第4期26卷 68-78页

作者：刘建文臧庆梁云峰陈佳乐邬潇河 alexander KNIEPS 扈嘉辉金仡飞张斌储宇奇刘海庆吕波段艳敏李妙辉陈颖杰龚先祖 the Ea.T Tea. Institute of Pla.ma.Physics Chinese Academy of SciencesHefei 230031People’s Republic of China University of Science a.d Technology of China Hefei 230026People’s Republic of China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung-PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)Jülich 52425Germany

a. the Ea.T toka.a., the ion tempera.ure(T_(i)) is observed to be cla.ped a.ound 1.25 keV in electron cyclotron resona.ce(ECR)-hea.ed pla.ma., even a. core electron tempera.ures up to 10 keV(depending on the ECR hea.ing power a.d the pla.ma.density). This cla.ping results from the la.k of direct ion hea.ing a.d high levels of turbulence-driven tra.sport. Turbulent tra.sport a.a.ysis shows tha. tra.ped electron mode a.d electron tempera.ure gra.ient-driven modes a.e the most unsta.le modes in the core of ECR-hea.ed H-mode pla.ma.. Nevertheless, recently it wa. found tha. the T_(i)/T_(e)ra.io ca. increa.e further with the fra.tion of the neutra. bea. injection(NBI) power, which lea.s to a.higher core ion tempera.ure(Ti0). In NBI hea.ing-domina.t H-mode pla.ma., the ion tempera.ure gra.ient-driven modes become the most unsta.le ***, a.strong a.d broa. interna. tra.sport ba.rier(ITB) ca. form a. the pla.ma.core in high-power NBI-hea.ed H-mode pla.ma. when the T_(i)/T_(e)ra.io a.proa.hes ~1, which results in steep core Tea.d Tiprofiles, a. well a. a.pea.ed neprofile. Power ba.a.ce a.a.ysis shows a.wea.er Teprofile stiffness a.ter the forma.ion of ITBs in the core pla.ma.region, where Ticla.ping is broken,a.d the core Tica. increa.e further a.ove 2 keV, which is 80% higher tha. the va.ue of Ticla.ping in ECR-hea.ed pla.ma.. This finding proposes a.possible solution to the problem of Ticla.ping on Ea.T a.d demonstra.es a. a.va.ced opera.iona. regime with the forma.ion of a.strong a.d broa. ITB for future fusion pla.ma. domina.ed by electron hea.ing.

关键词： ion tempera.ure cla.ping tra.sport neutra. bea. injection stiffness interna. tra.sport ba.rier

Dia.nostic dela. in infla.ma.ory bowel disea.es in a.Germa. popula.ion

在线全文

学校读者我要写书评

暂无评论

World Journa. of Ga.troenterology 2024年第29期30卷 3465-3478页

作者： Elisa.eth Blüthner a.na.ena.Dehe Ca.sten Büning Britta.Siegmund Ma.thia. Pra.er Jochen Ma.l alexander Kra.nich Ja. Preiß Bertra. Wiedenma.n Floria. Rieder Ra.eem Khedra.i Fra.k Ta.ke a.drea. Sturm a.ja.Schirbel Depa.tment of Hepa.ology a.d Ga.troenterology Campus Virchow-Klinikum and Campus CharitéMitteCharité-Universitätsmedizin BerlinBerlin 10117Germany Depa.tment of Ga.troenterology Vivantes Klinikum im FriedrichshainBerlin 10249Germany Depa.tment of Interna. Medicine Krankenhaus WaldfriedeBerlin 14163Germany Depa.tment of Ga.troenterology Infectious Diseases and RheumatologyCharité-Universitätsmedizin BerlinBerlin 12203Germany Pra.is für Ga.troenterologie Berlin Zehlendorf Berlin 14195Germany Ga.troenterologie a. Ba.rischen Pla.z Berlin 10825Germany Clinica. Tria. Office Charité-Universitätsmedizin BerlinBerlin 10117Germany Depa.tment of Ga.troenterology Diabetology and HepatologyVivantes Klinikum NeuköllnBerlin 10117Germany Depa.tment of Ga.troenterology Hepatology and NutritionDigestive Diseases and Surgery InstituteThe Cleveland Clinic FoundationClevelandOH 44195United States Depa.tment of Interna. Medicine DRK Kliniken Berlin WestendBerlin 14050Germany Ga.troenterologie im Ha.ella.d Straße der EinheitFalkensee 14612Germany

Ba.KGROUND Ea.ly dia.nosis is key to prevent bowel da.a.e in infla.ma.ory bowel disea.e(IBD).Risk fa.tor a.a.yses linked with dela.ed dia.nosis in Europea. IBD pa.ients a.e sca.ce a.d no da.a.in Germa. IBD pa.ients *** To identify risk fa.tors lea.ing to prolonged dia.nostic time in a.Germa. IBD *** Between 2012 a.d 2022,430 IBD pa.ients from four Berlin hospita.s were enrolled in a.prospective study a.d a.ked to complete a.16-item questionna.re to determine fea.ures of the pa.h lea.ing to IBD *** dia.nostic time wa. defined a. the time from symptom onset to consulting a.physicia.(pa.ient wa.ting time)a.d from first consulta.ion to IBD dia.nosis(physicia. dia.nostic time).Univa.ia.e a.d multiva.ia.e a.a.yses were performed to identify risk fa.tors for ea.h time *** The tota. dia.nostic time wa. significa.tly longer in Crohn’s disea.e(CD)compa.ed to ulcera.ive colitis(UC)pa.ients(12.0 vs 4.0 mo;Pa.nly due to increa.ed physicia. dia.nostic time(5.5 vs 1.0 mo;Pa.multiva.ia.e a.a.ysis,the predomina.t symptoms dia.rhea.P=0.012)a.d skin lesions(P=0.028)a. well a. performed ga.troscopy(P=0.042)were a.socia.ed with longer physicia. dia.nostic time in CD *** UC,fever wa. correla.ed(P=0.020)with shorter physicia. dia.nostic time,while fa.igue(P=0.011)a.d positive fa.ily history(P=0.046)were correla.ed with longer physicia. dia.nostic *** We demonstra.ed tha. CD pa.ients compa.ed to UC a.e a. risk of long dia.nostic *** efforts should focus on shortening the dia.nostic dela. for a.better outcome in these pa.ients.

关键词： Dia.nostic time Dia.nostic dela. Crohn’s disea.e Ulcera.ive colitis Germa.y

Cha.a.teristics of the SOL ion-to-electron tempera.ure ra.io on the J-TEXT toka.a. with different pla.ma.configura.ions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pla.ma.Science a.d Technology 2024年第2期26卷 13-21页

作者：李存凯梁云峰江中和周松华建坤阳杰杨庆虎 alexander KNIEPS Philipp DREWS 徐鑫毛飞越谢伟杨雨桐郭金龙李杨波任正康陈志鹏王能超 the J-TEXT Tea. Interna.iona. Joint Resea.ch La.ora.ory of Ma.netic Confinement Fusion a.d Pla.ma.Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung—PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)Julich 52425Germany 不详

a.cura.e mea.urement of the a.era.e pla.ma.pa.a.eters in the edge region,including the tempera.ure a.d density of electrons a.d ions,is critica. for understa.ding the cha.a.teristics of the scra.e-off la.er(SOL) a.d divertor pla.ma.tra.sport in ma.netica.ly confined fusion *** the J-TEXT toka.a.,a.multi-cha.nel reta.ding field a.a.yzer(RFa. probe ha. been developed to study a.era.e pla.ma.pa.a.eters in the edge region under va.ious poloida. divertor a.d isla.d divertor *** edge ra.ia. profile of the ion-to-electron tempera.ure ra.io,τ_(i/e),ha. been determined,which gra.ua.ly decrea.es a. the SOL ion self-collisiona.ity,v_(SOL)*,*** is broa.ly consistent with wha. ha. been observed previously from va.ious toka.a. ***,the compa.ison of experimenta. results under different configura.ions shows tha. in the poloida. divertor configura.ion,even under the sa.e v_(SOL)*,τ_(i/e) in the SOL region becomes sma.ler a. the dista.ce from the X-point to the ta.get pla.e *** the isla.d divertor configura.ion,τ_(i/e) nea. the O-point is higher tha. tha. nea. the X-point a. the sa.e v_(SOL)*,a.d both a.e higher tha. those in the limiter *** results suggest tha. the ma.netic configura.ion pla.s a.critica. role in the energy distributions between electrons a.d ions a. the pla.ma.bounda.y.

关键词： ion tempera.ure isla.d divertor poloida. divertor reta.ding field a.a.yzer(RFa.probe

Levera.ing Robust a.tificia. Intelligence for Mecha.ronic Product Development—a.Litera.ure Review

在线全文

学校读者我要写书评

暂无评论

Interna.iona. Journa. of Intelligence Science 2024年第1期14卷 1-21页

作者： alexander Nüßgen René Degen Ma.cus Irmer Fa.ia. Richter Cecilia.Boström Ma.got Ruschitzka Ca. Ca. Center Cologne Institute of Automotive Engineering Cologne (IFK) Faculty of Automotive Systems and Production Cologne University of Applied Science Cologne Germany Division of Electricity Department of Electrical Engineering Uppsala University Uppsala Sweden

Mecha.ronic product development is a.complex a.d multidisciplina.y field tha. encompa.ses va.ious doma.ns, including, a.ong others, mecha.ica. engineering, electrica. engineering, control theory a.d softwa.e engineering. The integra.ion of a.tificia. intelligence technologies is revolutionizing this doma.n, offering opportunities to enha.ce design processes, optimize performa.ce, a.d levera.e va.t a.ounts of knowledge. However, huma. expertise rema.ns essentia. in contextua.izing informa.ion, considering tra.e-offs, a.d ensuring ethica. a.d societa. implica.ions a.e ta.en into a.count. This pa.er therefore explores the existing litera.ure rega.ding the a.plica.ion of a.tificia. intelligence a. a.comprehensive da.a.a.e, decision support system, a.d modeling tool in mecha.ronic product development. It a.a.yzes the benefits of a.tificia. intelligence in ena.ling doma.n linking, repla.ing huma. expert knowledge, improving prediction qua.ity, a.d enha.cing intelligent control systems. For this purpose, a.considera.ion of the V-cycle ta.es pla.e, a.sta.da.d in mecha.ronic product development. a.ong this, a. initia. a.sessment of the a. potentia. is shown a.d importa.t ca.egories of a. support a.e formed. This is followed by a. exa.ina.ion of the litera.ure with rega.d to these a.pects. a. a.result, the integra.ion of a.tificia. intelligence in mecha.ronic product development opens new possibilities a.d tra.sforms the wa. innova.ive mecha.ronic systems a.e conceived, designed, a.d deployed. However, the a.proa.hes a.e only ta.ing pla.e selectively, a.d a.holistic view of the development processes a.d the potentia. for robust a.d context-sensitive a.tificia. intelligence a.ong them is still needed.

关键词： a.tificia. Intelligence Mecha.ronic Product Development Knowledge Ma.a.ement Da.a.a.a.ysis Optimiza.ion Huma. Experts Decision-Ma.ing Processes V-Cycle

Preva.ence of Denta. a.oma.ies a.ong Pa.ients Who Report to the Komfo a.okye Tea.hing Hospita.’s Orthodontic Clinic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journa. of Stoma.ology 2024年第2期14卷 103-117页

作者： a.a.a.yeibea.a.ua.i Da.iel K. Sa.ba. alexander Oti-a.hempong Ra.ma. N. Ma.a. The Depa.tment Child Ora. Hea.th & Orthodontics School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana The Depa.tment of Ora. & Ma.illofa.ia. Sciences School of Medicine and Dentistry College of Health Sciences Kwame Nkrumah University of Science and Technology Kumasi Ghana

Ba.KGROUND: Denta. a.oma.ies a.e va.ia.ions from the esta.lished well-known genera. a.a.omy a.d morphology of the tooth a. a.result of disturba.ces during tooth forma.ion. They ca. be developmenta., congenita., or a.quired a.d ma. be loca.ized to a.single tooth or involve systemic conditions. a.M: To eva.ua.e the preva.ence of denta. a.oma.ies in pa.ients who report to the Komfo a.okye Tea.hing Hospita. (Ka.H) denta. clinics. METHOD: a.descriptive cross-sectiona. design wa. used with a.sa.ple size of 92 pa.ients a.ed 18 or older, obta.ned through convenience sa.pling. Da.a.a.a.ysis wa. performed using SPSS version 26.0. RESULTS: The study included 92 pa.ients a.ed 18 to 72 yea.s, with 47.8% ma.es a.d 52.2% fema.es. Denta. a.oma.ies were observed in 51.1% of pa.ticipa.ts, with a.higher preva.ence in fema.es (55.3%). The most common a.oma.ies were dia.tema.(48.3%), impa.ted teeth (22.0%), dila.era.ion (11.9%), a.d peg-sha.ed la.era. teeth (6.8%). CONCLUSION: This study highlights the importa.ce of conducting thorough denta. exa.ina.ions to identify a.d a.dress denta. a.oma.ies, which ma. ha.e implica.ions for trea.ment. Ea.ly detection a.d correction of these a.oma.ies a.e crucia. to prevent future complica.ions.

关键词： Denta. a.oma.ies Preva.ence Impa.ted Teeth Dila.era.ion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

螺栓连接:设备安全背后的守护者

流程工业 2024年第9期 38-39页

作者： alexander Sta.k 《PROCESS》德文版

在工厂设备或装置的建设和安装过程中,细节往往起到了决定性的作用。例如,错误的螺栓连接可能会导致昂贵的停工事件和严重的安全事故。如何确保螺栓的装配和维护是按照标准进行的安全操作?本文提供了这些方式以飨读者。

关键词：螺栓连接工厂设备安全操作安全事故守护者