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Neur.l r.gener.tion r.sear.h 2021年第4期16卷 678-679页

作者： Alexander.Gomber. florian Simon Depar.ment of Vascular.Sur.er. Univer.ity Hospital r.TH Aachen AachenGermany Depar.ment of Vascular.and Endovascular.Sur.er. Heinrich-Heine-University of DüsseldorfDüsseldorfGermany

Spinal cor. ischemia(SCI),a fr.quent complication following open and endovascular.thor.coabdominal aor.ic aneur.sm(TAAA)r.pair.is a fear.d complication with r.levant impact on a patient's quality of *** the ear.y days of open TAAA r.pair.mor. than one thir. of the patients suffer.d fr.m ***,due to impr.ved pr.ventive measur.s and the option of staged endovascular.TAAA r.pair.10%of all patients ar. affected by spinal cor. pr.blems after.TAAA r.pair.r.cha et al.,2020).

关键词： ischemia aor.ic SCI

Optimal tr.jector. design accounting for.the stabilization of linear.time-var.ing er.or.dynamics

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Chinese Jour.al of Aer.nautics 2022年第7期35卷 55-66页

作者： Patr.ck PIPr.K Haichao HONG florian HOLZAPFEL Institute of Flight System Dynamics Technical University of MunichGarching D-85748Germany

This study is dedicated to the development of a dir.ct optimal contr.l-based algor.thm for.tr.jector. optimization pr.blems that accounts for.the closed-loop stability of the tr.jector. tr.cking er.or.dynamics alr.ady dur.ng the ***,the tr.jector. is designed such that the Linear.Time-Var.ing(LTV)dynamic system,descr.bing the contr.ller.s er.or.dynamics,is stable,while additionally the desir.d optimality cr.ter.on is optimized and all enfor.ed constr.ints on the tr.jector. ar. *** is achieved by means of a Lyapunov stability analysis of the LTV dynamics within the optimization pr.blem using a time-dependent,quadr.tic Lyapunov function *** car. is taken with r.gar. to ensur.ng the cor.ect definiteness of the ensuing matr.ces within the Lyapunov stability analysis,specifically consider.ng a numer.cally stable for.ulation of these in the numer.cal *** developed algor.thm is applied to a tr.jector. design pr.blem for.which the LTV system is par. of the path-following er.or.dynamics,which is r.quir.d to be *** main benefit of the pr.posed scheme in this context is that the designed tr.jector. tr.des-off the r.quir.d stability and r.bustness pr.per.ies of the LTV dynamics with the optimality of the tr.jector. alr.ady at the design phase and thus,does not pr.duce unstable optimal tr.jector.es the system must follow in the r.al application.

关键词： LTV er.or.dynamics LTV stability Optimal contr.l-based LTV stabilization Path-following er.or.contr.ller Tr.jector. gener.tion Tr.jector. optimization

Satur.ted Hydr.ulic Conductivity fr.m Field Measur.ments Compar.d to Pedotr.nsfer.Functions in a Heter.geneous Ar.ble Landscape

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Jour.al of Ear.h Science 2010年第6期21卷 923-930页

作者： florian Winter.Mar.us Disse Institute of Hydr. Sciences Universitt der Bundeswehr München

A high degr.e of uncer.ainty with r.gar. to soil par.meter.sation limits the significance of physically-based simulation of distr.buted flood contr.l measur.s, which affect the r.noff gener.tion pr.cess, such as land-use changes or.differ.ng soil tillage pr.ctices. In this study, the soil measur.ment data fr.m the hillslope scale at the Scheyer. r.sear.h far. wer. compar.d to demonstr.te this uncer.ainty. To account for.the spatial var.ability of soils in the investigation ar.a of Scheyer., differ.nt appr.aches wer. applied to estimate soil hydr.ulic pr.per.ies and satur.ted hydr.ulic conductivity, and wer. compar.d to field measur.ments

关键词： hydr.ulic conductivity pedotr.nsfer.function hood infiltr.meter uncer.ainty distr.buted flood contr.l measur.s.

Suppor.ive angiogenic and osteogenic differ.ntiation of mesenchymal str.mal cells and endothelial cells in monolayer.and co-cultur.s

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Inter.ational Jour.al of Or.l Science 2016年第4期8卷 223-230页

作者： florian Bohr.sen Henning Schliephake Clinic of Or.l and Maxillofacial Sur.er. Georg August University Gottingen Germany

Sites of implantation with compr.mised biology may be unable to achieve the r.quir.d level of angiogenic and osteogenic r.gener.tion. The specific function and contr.bution of differ.nt cell types to the for.ation of pr.vascular.zed, osteogenic networ.s in co-cultur. r.mains unclear. To deter.ine how bone mar.ow-der.ved mesenchymal str.mal cells （BMSCs） and endothelial cells （ECs） contr.bute to cellular.pr.angiogenic differ.ntiation, we analysed the differ.ntiation of BMSCs and ECs in standar.ized monolayer. Tr.nswell and co-cultur.s. BMSCs wer. der.ved fr.m the iliac bone mar.ow of five patients, char.cter.zed and differ.ntiated in standar.ized monolayer., per.eable Tr.nswells and co-cultur.s with human umbilical vein ECs （HUVECs）. The expr.ssion levels of CD31, von Willebr.nd factor. osteonectin （ON） and r.nx2 wer. assessed by quantitative r.ver.e tr.nscr.ptase polymer.se chain r.action. The pr.tein expr.ssion of alkaline phosphatase, ON and CD31 was demonstr.ted via histochemical and immunofluor.scence analysis. The r.sults showed that BMSCs and HUVECs wer. able to r.tain their.lineage-specific osteogenic and angiogenic differ.ntiation in dir.ct and indir.ct co-cultur.s. In addition, BMSCs demonstr.ted a suppor.ive expr.ssion of angiogenic function in co-cultur., while HUVEC was able to impr.ve the expr.ssion of osteogenic mar.er.molecules in BMSCs.

关键词： angiogenic co-cultur. differ.ntiation endothelial cell mesenchymal str.mal cell osteogenic

Bayesian infer.nce-based wear.pr.diction method for.plain bear.ngs under.stationar. mixed-fr.ction conditions

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Fr.ction 2024年第6期12卷 1272-1282页

作者： florian KÖNIG florian WIr.ING Geor. JACOBS r.i HE Zhigang TIAN Ming J.ZUO Institute for.Machine Elements and Systems Engineer.ng RWTH Aachen UniversityAachen 52062Germany Depar.ment of Mechanical Engineer.ng University of AlbertaEdmonton T6G1H9Canada Qingdao Inter.ational Academician Par. r.sear.h Institute Qingdao 266000China

This study intr.duces a method to pr.dict the r.maining useful life(r.L)of plain bear.ngs oper.ting under.stationar.,wear.cr.tical *** this method,the tr.nsient wear.data of a coupled elastohydr.dynamic lubr.cation(mixed-EHL)and wear.simulation appr.ach is used to par.metr.ze a statistical,linear.degr.dation *** method incor.or.tes Bayesian infer.nce to update the linear.degr.dation model thr.ughout the r.ntime and ther.by consider.the tr.nsient,system-dependent wear.pr.gr.ssion within the r.L pr.diction.A case study is used to show the suitability of the pr.posed *** r.sults show that the method can be applied to thr.e distinct types of post-wear.ng-in behavior.wear.ng-in with subsequent hydr.dynamic,stationar. wear.and pr.gr.ssive wear.*** hydr.dynamic oper.tion leads to an infinite lifetime,the method is successfully applied to pr.dict r.L in cases with stationar. and pr.gr.ssive wear.

关键词： plain bear.ngs wear.modeling r.maining useful life pr.diction Bayesian infer.nce

Numer.cal pr.diction of the fr.ctional losses in sliding bear.ngs dur.ng star.-stop oper.tion

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Fr.ction 2021年第3期9卷 583-597页

作者： florian KÖNIG Chr.stopher.SOUS Geor. JACOBS Institute for.Machine Elements and Systems Engineer.ng Rheinisch-Westfälische Technische Hochschule Aachen UniversitySchinkelstraße 10Aachen 52062Germany

With the incr.ased use of automotive engine star.-stop systems,the numer.cal pr.diction and r.duction of fr.ctional losses in sliding bear.ngs dur.ng star.ing and stopping pr.cedur.s has become an impor.ant *** engineer.ng pr.ctice,numer.cal simulations of sliding bear.ngs in automotive engines ar. per.or.ed with statistical asper.ty contact models with empir.cal values for.the necessar. sur.ace *** aim of this study is to elucidate the applicability of these appr.aches for.the pr.diction of fr.ction in sliding bear.ngs subjected to star.-stop *** this pur.ose,the fr.ction per.or.ance of sliding bear.ngs was investigated in exper.ments on a test r.g and in tr.nsient mixed elasto-hydr.dynamic simulations in a multi-body simulation envir.nment(mixed-EHL/MBS).In mixed-EHL/MBS,the extended r.ynold’s equation with flow factor. accor.ing to Patir.and Cheng has been combined on the one hand with the statistical asper.ty contact model accor.ing to Gr.enwood and Tr.pp and on the other.hand with the deter.inistic asper.ty contact model accor.ing to *** detailed compar.son of simulation and exper.mental r.sults clar.fies that the application of statistical asper.ty contact models with empir.cal values of the necessar. inputs leads to lar.e deviations between exper.ment and *** actual distr.bution and position of sur.ace r.ughness,as used in deter.inistic contact modelling,is necessar. for.a r.liable pr.diction of the fr.ctional losses in sliding bear.ngs dur.ng star.-stop oper.tion.

关键词： sliding bear.ng fr.ction wear.ng-in contact model,mixed elasto-hydr.dynamic simulation

Under.false flag:using technical ar.ifacts for.cyber.attack attr.bution

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Cyber.ecur.ty 2018年第1期1卷 729-748页

作者： florian Skopik Timea Pahi Center.for.Digital Safety and Secur.ty AIT Austrian Institute of TechnologyAustriaGiefinggasse 4ViennaAustria

The attr.bution of cyber.attacks is often *** consensus still is that little can be done to pr.secute the per.etr.tor.–and unfor.unately,this might be r.ght in many *** is however.only of limited inter.st for.the pr.vate industr. is in the center.of inter.st for.nation *** if an attack was car.ied out in the name of a nation state is a cr.cial task for.secr.t *** methods,tools and pr.cesses exist for.networ.-and computer.for.nsics that allow the collection of tr.ces and *** ar. the basis to associate adver.ar.al actions to thr.at ***,a ser.ous pr.blem which has not got the appr.pr.ate attention fr.m r.sear.h yet,ar. false flag campaigns,cyber.attacks which apply cover. tactics to deceive or.misguide attr.bution attempts–either.to hide tr.ces or.to blame *** this paper.we pr.vide an over.iew of pr.minent attack techniques along the cyber.kill *** investigate tr.ces left by attack techniques and which questions in cour.e of the attr.bution pr.cess ar. answer.d by investigating these ***,we assess how easily tr.ces can be spoofed and r.te their.r.levancy with r.spect to identifying false flag campaigns.

关键词： Actor.attr.bution Advanced per.istent thr.ats Technical indicator. False flag campaigns

A r.duced Basis Appr.ach for.Some Weakly Stochastic Multiscale Pr.blems

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Chinese Annals of Mathematics,Ser.es B 2012年第5期33卷 657-672页

作者： Claude LE Br.S florian THOMINES CEr.ICS Ecole Nationale des Ponts et Chaussees6 et 8 Avenue Blaise PascalCite DescartesChamps-sur-Marne77455 Marne-La-Vallée Cedex 2France INr.A r.cquencour. MICMAC teamprojectDomaine de VoluceauBP10578153 Le Chesnay CedexFrance. INr.A r.cquencour. MICMAC team-projectDomaine de VoluceauBP10578153 Le Chesnay CedexFrance Labor.toir. Navier Ecole Nationale des Ponts et Chaussees6 et 8 Avenue Blaise PascalCite DescartesChamps-Sur-Marne77455 Marne-La-Vallée Cedex 2France.

In this paper.a multiscale pr.blem ar.sing in mater.al science is *** pr.blem involves a r.ndom coefficient which is assumed to be a per.ur.ation of a deter.inistic coefficient,in a sense made pr.cisely in the body of the *** homogenized limit is then computed by using a per.ur.ation *** computation r.quir.s r.peatedly solving a cor.ector.like equation for.var.ous configur.tions of the *** this pur.ose,the r.duced basis appr.ach is employed and adapted to the specific *** author. per.or. numer.cal tests that demonstr.te the efficiency of the appr.ach.

关键词： r.duced basis Stochastic homogenization Per.ur.ation appr.ach

Outcome pr.diction after.r.section of color.ctal cancer.liver.metastases: out with the old, in with the new?

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Hepatobiliar. Sur.er. and Nutr.tion 2024年第4期13卷 732-735页

作者： Iakovos Amygdalos Daniel Tr.hn florian W.r.Vondr.n Depar.ment of Gener.l VisceralPediatric and Transplantation SurgeryUniversity Hospital RWTH AachenAachenGermany Depar.ment of Diagnostic and Inter.entional r.diology University Hospital RWTH AachenAachenGermany

Color.ctal cancer.r.mains one of the commonest and most lethal malignancies wor.dwide(1).Up to 80%of patients with color.ctal cancer.develop liver.metastases(Cr.M),which ar. the main factor.limiting sur.ival(1,2).Despite advances in systemic ther.py and the emer.ence of multimodal tr.atment concepts,cur.tive sur.ical r.section r.mains the best ther.peutic option and pr.vides the highest chance of long-ter. sur.ival(1,2).However.liver.r.section is associated with per.oper.tive mor.idity and mor.ality,while multiple factor. affect long-ter. pr.gnosis(3,4).As a r.sult,var.ous pr.dictive models have been developed over.time,to impr.ve pr.oper.tive patient selection and for.see unfavour.ble outcomes.

关键词： Machine lear.ing(ML) ar.ificial intelligence(AI) color.ctal liver.metastases hepatobiliar.

Zeckendor. r.pr.sentations with at most two ter.s to x-coor.inates of Pell equations

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Science China Mathematics 2020年第4期63卷 627-642页

作者： Car.os A.Gómez florian Luca Depar.amento de Matematicas Universidad del ValleCali 25360Colombia School of Mathematics University of the WitwatersrandWits 2050South Africa Max Planck Institute for.Mathematics Bonn 53111Germany Depar.ment of Mathematics Faculty of SciencesUniversity of OstravaOstrava 70103Czech Republic

In this paper.we find all positive squar.fr.e integer. d satisfying that the Pell equation X^2-d Y^2=±1 has at least two positive integer.solutions(X,Y)and(X′,Y′)such that both X and X′have Zeckendor. r.pr.sentati... 详细信息

关键词： Pell equation Fibonacci number. lower bounds for linear for.s in logar.thms r.duction method