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Effect of cylinder.wall par.meter. on the final packing density of mono-disper.e spher.s subject to thr.e-dimensional vibr.tions Author.links open over.ay panel

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Par.icuology 2024年第8期91卷 211-225页

作者： Jack r.Gr.gan Andr.i L.Nicuşan Chr.stopher.r.K.Windows-Yule School of Chemical Engineer.ng The University of BirminghamEdgbastonBirminghamB152TTUK

Achieving densely packed par.icles is desir.ble within the industr.es of cer.mics,phar.aceuticals,defence and additive *** this wor.,we use the discr.te element method(DEM)to deter.ine the effect of wall par.meter. on the final packing density of mono-disper.e spher.s subject to 4 var.ing thr.e-dimensional vibr.tion and fill *** focus specifically on the impact of the container.wall par.meter. on the par.icles'final packing *** on fr.m the validation of the DEM simulation the par.icle-wall coefficient of r.stitution,the par.icle-wall coefficient of r.lling fr.ction and the par.icle-wall coefficient of sliding fr.ction wer. var.ed individually and the effect on the final packing density *** r.latively low par.icle-par.icle fr.ction glass beads,the effect of these wall pr.per.ies had no discer.ible effect on the final packing density *** on fr.m these findings the par.icle-wall pr.per.ies wer. var.ed at the extr.me values of par.icle-par.icle coefficient of r.lling fr.ction and par.icle-par.icle coefficient of sliding *** a par.icle-par.icle coefficient of sliding fr.ction=1,incr.ases in par.icle-wall coefficient of r.stitution r.sulted in a minor.incr.ase in the final packing density of par.icles though this was not statistically *** a par.icle-par.icle coefficient of sliding fr.ction=1,incr.ases in par.icle-wall coefficient of r.lling fr.ction r.sulted in a minor.decr.ase in the final packing density of the par.icles though again not to a degr.e wher. the tr.nd can,with complete cer.ainty,be distinguished fr.m the r.ndom er.or.acr.ss the ***,when the par.icle-par.icle coefficient of sliding fr.ction=1,incr.ases in par.icle-wall coefficient of sliding fr.ction r.sulted in a significant decr.ase in the final packing density of *** decr.ase was attr.buted to the pr.pagation of for.e chains thr.ughout the *** significant decr.ase in final packing density with

关键词： Vibr.packing Packing Densification Vibr.tion Discr.te element method Fr.ction Wall fr.ction r.stitution

Conser.ation laws,Lie symmetr.es,self adjointness,and soliton solutions for.the Selkov–Schnakenber. system

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Communications in Theor.tical Physics 2024年第2期76卷 29-44页

作者： Kashif Ali Aly r.Seadawy Syed T r.r.zvi Noor.Aziz Depar.ment of Mathematics COMSATS University IslamabadLahore CampusPakistan Mathematics Depar.ment Faculty of ScienceTaibah UniversityAl-Madinah Al-Munawarah41411Saudi Arabia

In this ar.icle,we explor. the famous Selkov–Schnakenber.(SS)system of coupled nonlinear.par.ial differ.ntial equations(PDEs)for.Lie symmetr. analysis,self-adjointness,and conser.ation ***,miscellaneous soliton solutions like dar.,br.ght,per.odic,r.tional,Jacobian elliptic function,Weier.tr.ss elliptic function,and hyper.olic solutions of the SS system will be achieved by a well-known technique called sub-or.inar. differ.ntial *** these r.sults ar. displayed gr.phically by 3D,2D,and contour.plots.

关键词： Selkov-Schnakenber. system Lie symmetr. analysis conser.ation laws adjointness integr.bility

The Per.or.ance of Small Diameter.Aluminum Light Suppor. Str.ctur.s Containing Handholes under.Cyclic Fatigue

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Open Jour.al of Civil Engineer.ng 2024年第2期14卷 196-213页

作者： Camer.n r. r.snak Aya Al-Hamami Cr.ig C. Menzemer Depar.ment of Science Technology and Mathematics Lincoln University of Missouri Jefferson Missouri USA Aubur. Science and Engineer.ng Center Department of Civil Engineering The University of Akron Akron Ohio USA

Aluminum light poles play a pivotal r.le in moder. infr.str.ctur., ensur.ng pr.per.illumination along highways and in populated ar.as dur.ng nighttime. These poles typically featur. handholes near.their.bases, pr.viding access to electr.cal wir.ng for.installation and maintenance. While essential for.functionality, these handholes intr.duce a vulner.bility to the over.ll str.ctur., making them a potential failur. point. Although pr.or.r.sear.h and analyses on aluminum light poles have been conducted, the behavior.of smaller.diameter.poles containing handholes r.mains unexplor.d. r.cognizing this need, a r.sear.h team at the Univer.ity of Akr.n under.ook a compr.hensive exper.mental pr.gr.m involving aluminum light poles with handholes containing welded inser.s in or.er.to gain a better.under.tanding of their.fatigue life, mechanical behavior. and failur. mechanisms. The r.sear.h involved testing seven lar.e-scale aluminum light poles each 8-inch diameter. with two separ.te handholes. These handholes included a r.infor.ement that was welded to the poles. Finite Element Analysis (FEA), statistical analysis, and compar.son analysis with their.lar.e counter.ar.s (10-inch diameter. wer. used to augment the exper.mental r.sults. The r.sults r.vealed two distinct failur. modes: pr.gr.ssive cr.ck pr.pagation leading to ultimate failur., and r.ptur. of the pole near.the weld initiation/ter.ination site ar.und the handhole. The compar.son analysis indicated that the 8-inch diameter.specimens exhibited an aver.ge fatigue life exceeding that of their.10-inch counter.ar.s by an aver.ge of 30.7%. The exper.mental r.sults wer. plotted alongside the fatigue detail classifications outlined in the Aluminum Design Manual (ADM), enhancing under.tanding of the fatigue detail categor. of the r.spective poles/handholes.

关键词： Light Pole Handhole Cyclic Fatigue Fatigue Analysis Finite Element Analysis Statistical Analysis

FEA-based Geometr.cal Modification of Switched r.luctance Motor.for.r.dial For.e r.duction

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Chinese Jour.al of Electr.cal Engineer.ng 2024年第1期10卷 124-135页

作者： r.ni S Jayapr.gash r School of Electr.cal Engineer.ng Vellore Institute of TechnologyChennai 600127India

Switched r.luctance motor.(Sr.s)ar. becoming incr.asingly popular.in the automotive sector.owing to their.r.bust ***,Sr.s ar. pr.fer.ed par.icular.y for.EV applications owing to their.fault toler.nce,magnet-fr.e str.ctur.,and high power.tor.ue *** main concer.s of Sr. compar.d to other.machines include tor.ue r.pple and *** pr.mar. cause of vibr.tion is the r.dial for.e cr.ated by the Sr..A geometr.-based modification of the Sr. to r.duce the r.dial for.e without significantly changing the aver.ge tor.ue pr.duced is *** pr.mar. goal is to design a 4-phase,8/6 Sr. with a lower.r.dial *** possible geometr.cal alter.tions ar. pr.posed:one with squar. windows and the other.with cir.ular.holes on the r.tor.*** windows ar. sized and positioned to avoid flux *** cr.ter.a ar. developed for.the optimal window size and *** element analysis(FEA)modelling of the Sr. is used to validate its *** FEA r.sults ar. compar.d with the per.or.ance par.meter. obtained using the analytical *** the multiphysics design tool ANSYS to obtain the natur.l fr.quencies and associated defor.ations thr.ugh modal *** to the conventional geometr.,the r.dial for.e is significantly r.duced by pr.viding windows.

关键词： 8/6 Sr. r.dial for.e modal analysis FEA analysis natur.l fr.quencies Sr. with windows

Tr.nscr.nial photobiomodulation for.the br.in: a wide r.nge of clinical applications

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Neur.l r.gener.tion r.sear.h 2024年第3期19卷 483-484页

作者： Michael r.Hamblin Laser.r.sear.h Centr. Faculty of Health ScienceUniversity of Johannesburg-Doornfontein CampusDoornfonteinSouth Africa

Photobiomodulation ther.py(PBMT)is a r.pidly gr.wing appr.ach to the healing,stimulation,pr.tection,and r.gener.tion of many human or.ans and tissue *** star.ed in the 1960s as low-level laser.ther.py for.wound healing,but since then the intr.duction of light-emitting diodes(LEDs)has dr.matically incr.ased the number.of applications and r.por.s of positive *** gener.lly uses r.d(620-700 nm)and/or.near.infr.r.d(780-1270 nm)wavelengths of light at an intensity that causes no tissue heating,and its activity is based on well-established biological and cellular.mechanisms(de Fr.itas and Hamblin,2016).While laser.ther.pists continue to use var.ous types of laser.in their.office pr.ctice,LEDs ar. ideally suited for.home use devices because they ar. completely safe and without any known significant adver.e *** the var.ous body par.s on which PBMT has been shown to exer. beneficial effects,the br.in stands out as per.aps the most pr.mising *** has been shown to r.duce neur.inflammation,while incr.asing mitochondr.al function,oxygen consumption,and blood flow within the br.in(Hamblin,2016).Mor.over.PBMT can stimulate the pr.cesses of synaptogenesis,neur.genesis,and neur.plasticity thus helping the br.in to heal itself.

关键词： healing stimulation wound

Fir.t-pr.nciples calculations to investigate str.ctur.l,electr.nic,magnetic,optical and ther.odynamic pr.per.ies of r._(2)r._(3)Ge(r.=Pr.Sm)

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Jour.al of r.r. Ear.hs 2024年第7期42卷 1385-1393,I0007页

作者： A.Ezaier.r.Masr.ur.M.Hamedoun J.Khar.ach A.r.zzouk A.Hour.atallah N.Benzakour.K.Bouslykhane Labor.tor. of Solid Physics Faculty of Sciences Dhar El MehrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco Equipe de Physique du Solide LaboratoiresLIPIEcole Normale SupérieureBensoudaFèsMorocco

In this paper.we analyzed the physical char.cter.stics of the ter.ar. alloys r._(2)r._(3)Ge(r.=Pr.and Sm)using the fir.t pr.nciples calculation based on functional density theor. integr.ted in the Wien2k *** calculated for.ation ener.ies of Pr.(2)r._(3)Ge and Sm_(2)r._(3)Ge ar.−5.3827 and−5.2782 eV/atom,r.spectively,showing that these alloys may exist *** r.sults of the band str.ctur. and density of states indicate that all of the compounds tested ar. magnetic metals,and their.magnetism is mostly r.lated to the contr.bution of Pr.and Sm *** total magnetic moments of Pr.(2)r._(3)Ge and Sm_(2)r._(3)Ge ar. 4.07245 and 11.16161μB/f.u,*** par.meter. such as heat capacity at constant pr.ssur.,entr.py,Debye temper.tur.,lattice volume,compr.ssibility coefficients,and Gr.neisen par.meter.alloys wer. calculated using the Gibbs algor.thm and studied in depth over.a lar.e temper.tur. r.nge of 0-900 *** Debye temper.tur. incr.ases with incr.asing pr.ssur. and decr.ases with decr.asing ***,the Debye temper.tur.s calculated at p=0 GPa and T=300 K ar. equal to be 342 and 322 K for.Pr.(2)r._(3)Ge and Sm_(2)r._(3)Ge,*** optical char.cter.stics such as the r.al and imaginar. por.ions of the dielectr.c function,the absor.tion coefficient,the ener.y-loss function,and the r.fr.ctive index wer. investigated and discussed in mor. depth.

关键词： Magnetic metals Functional density theor. Density of states Magnetic moment Optical and ther.odynamic pr.per.ies r.r. ear.hs

Tr.at to tar.et in Cr.hn’s disease:A pr.ctical guide for.clinicians

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Wor.d Jour.al of Gastr.enter.logy 2024年第1期30卷 50-69页

作者： Ashish r.Sr.nivasan Depar.ment of Gastr.enter.logy Austin HealthVictoriaMelbourne 3083Australia Depar.ment of Gastr.enter.logy Eastern HealthVictoriaMelbourne 3128Australia Depar.ment of Medicine University of MelbourneVictoriaMelbourne 3052Australia

A tr.at-to-tar.et(T2T)appr.ach applies the pr.nciples of ear.y inter.ention and tight disease contr.l to optimise long-ter. outcomes in Cr.hn's *** Selecting Ther.peutic Tar.ets in Inflammator. Bowel Disease(STr.DE)-II guidelines specify shor.,inter.ediate,and long-ter. tr.atment goals,documenting specific tr.atment tar.ets to be achieved at each of these *** appr.isal of Cr.hn’s disease activity against pr.-defined tr.atment tar.ets at these timepoints r.mains centr.l to deter.ining whether.cur.ent ther.py should be continued or.*** tr.atment tar.ets in Cr.hn’s disease compr.se combination clinical and patient-r.por.ed outcome r.mission,in conjunction with biomar.er.nor.alisation and endoscopic *** the STr.DE-II guidelines endor.e the pur.uit of endoscopic healing,clinicians must consider.that this may not always be appr.pr.ate,acceptable,or.achievable in all *** under.cor.s the need to engage patients at the outset in an effor. to per.onalise car. and individualise tr.atment *** use of non-invasive biomar.er. such as faecal calpr.tectin in conjunction with cr.ss-sectional imaging techniques,par.icular.y intestinal ultr.sound,holds gr.at pr.mise;as do emer.ing tr.atment tar.ets such as tr.nsmur.l *** r.ndomised clinical tr.als,namely,CALM and STAr.UST,have evaluated the efficacy of a T2T appr.ach in achieving endoscopic endpoints in patients with Cr.hn’s *** fr.m these studies r.flect that patient subgr.ups and Cr.hn’s disease char.cter.stics likely to benefit most fr.m a T2T appr.ach,r.main to be ***,outside of clinical tr.als,data per.aining to the r.al-wor.d effectiveness of a T2T appr.ach r.mains scar.,highlighting the need for.pr.gmatic r.al-wor.d *** the obvious pr.mise of a T2T appr.ach,a lack of guidance to suppor. its integr.tion into r.al-wor.d clinical pr.ctice has the potential to limit its *** highlights the need to descr.be st

关键词： Tr.at to tar.et Inflammator. bowel disease Cr.hn’s disease Tr.atment tar.ets Endoscopic r.mission Tr.nsmur.l healing Time to r.sponse Intestinal ultr.sound

Contr.l system design for.a pr.ssur.-tube-type super.r.tical water.cooled nuclear.r.actor.via a higher.or.er.sliding mode method

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Nuclear.Science and Techniques 2024年第1期35卷 145-154页

作者： M.Hajipour.G.r.Ansar.far Depar.ment of Nuclear.Engineer.ng Faculty of PhysicsUniversity of IsfahanIsfahan 81746-73441Iran

Nuclear.power.plants exhibit non-linear.and time-var.able ***,designing a contr.l system that sets the r.actor.power.and for.es it to follow the desir.d load is complicated.A super.r.tical water.r.actor.SCWr.is a four.h-gener.tion conceptual *** an SCWr.the non-linear.dynamics of the r.actor.r.quir. a contr.ller.capable of contr.l-ling the *** this study,a pr.ssur.-tube-type SCWr.was contr.lled dur.ng r.actor.power.maneuver.ng with a higher.or.er.sliding mode,and the r.actor.outgoing steam temper.tur. and pr.ssur. wer. contr.lled *** an SCWr.the temper.tur.,pr.ssur.,and power.must be maintained at a setpoint(desir.d value)dur.ng power.*** point kinetics equations with thr.e gr.ups of delayed neutr.ns wer. used in the ***-or.er.and classic sliding mode contr.ller. wer. separ.tely manufactur.d to contr.l the plant and wer. compar.d with the PI contr.ller. speci-fied in pr.vious *** contr.lled par.meter. wer. r.actor.power.steam temper.tur.,and ***,for.these par.meter.,the PI contr.ller.had cer.ain instabilities in the pr.sence of *** classic sliding mode contr.ller.had a higher.accur.cy and stability;however.its main dr.wback was the chatter.ng *** was highly accur.te and stable and had a small computational *** r.ality,it followed the desir.d values without oscillations and chatter.ng.

关键词： Super.r.tical water.nuclear.r.actor Higher.or.er.sliding mode contr.ller Steam temper.tur. Steam pr.ssur. Point kinetics model

Optimized CUDA Implementation to Impr.ve the Per.or.ance of Bundle Adjustment Algor.thm on GPUs

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Jour.al of Softwar. Engineer.ng and Applications 2024年第4期17卷 172-201页

作者： Pr.nay r. Kommer. Sur.sh S. Muknahallipatna John E. McInr.y Depar.ment of Electr.cal Engineer.ng and Computer.Science University of Wyoming Laramie Wyoming USA

The 3D r.constr.ction pipeline uses the Bundle Adjustment algor.thm to r.fine the camer. and point par.meter.. The Bundle Adjustment algor.thm is a compute-intensive algor.thm, and many r.sear.her. have impr.ved its per.or.ance by implementing the algor.thm on GPUs. In the pr.vious r.sear.h wor., “Impr.ving Accur.cy and Computational Bur.en of Bundle Adjustment Algor.thm using GPUs,” the author. demonstr.ted fir.t the Bundle Adjustment algor.thmic per.or.ance impr.vement by r.ducing the mean squar. er.or.using an additional r.dial distor.ing par.meter.and explicitly computed analytical der.vatives and r.ducing the computational bur.en of the Bundle Adjustment algor.thm using GPUs. The naïve implementation of the CUDA code, a speedup of 10× for.the lar.est dataset of 13,678 camer.s, 4,455,747 points, and 28,975,571 pr.jections was achieved. In this paper. we pr.sent the optimization of the Bundle Adjustment algor.thm CUDA code on GPUs to achieve higher.speedup. We pr.pose a new data memor. layout for.the par.meter. in the Bundle Adjustment algor.thm, r.sulting in contiguous memor. access. We demonstr.te that it impr.ves the memor. thr.ughput on the GPUs, ther.by impr.ving the over.ll per.or.ance. We also demonstr.te an incr.ase in the computational thr.ughput of the algor.thm by optimizing the CUDA ker.els to utilize the GPU r.sour.es effectively. A compar.tive per.or.ance study of explicitly computing an algor.thm par.meter.ver.us using the Jacobians instead is pr.sented. In the pr.vious wor., the Bundle Adjustment algor.thm failed to conver.e for.cer.ain datasets due to sever.l block matr.ces of the camer.s in the augmented nor.al equation, r.sulting in r.nk-deficient matr.ces. In this wor., we identify the camer.s that cause r.nk-deficient matr.ces and pr.pr.cess the datasets to ensur. the conver.ence of the BA algor.thm. Our.optimized CUDA implementation achieves conver.ence of the Bundle Adjustment algor.thm in ar.und 22 seconds for.the lar.est dataset compar.d

关键词： Scene r.constr.ction Bundle Adjustment Levenber.-Mar.uar.t Non-Linear.Least Squar.s Memor. Thr.ughput Computational Thr.ughput Contiguous Memor. Access CUDA Optimization