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Piezoelectr.c r.sonant ice pr.tection systems–Par.1/2:Pr.diction of power.r.quir.ment for.de-icing a NACA 0024 leading edge

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Chinese Jour.al of Aer.nautics 2024年第3期37卷 92-103页

作者： Valer.an PALANQUE jason POTHIN Vale′r.e POMMIEr.BUDINGEr.Mar. BUDINGEr Institut Clement Ader University of ToulouseINSAISAE-SUPAEROMINES ALBIUPSCNRSToulouse 31055France ISAE-SUPAEr. University of Toulouse10 Avenue Edouard BelinToulouse 31055France

This paper.pr.poses a numer.cal method to analyze the ice pr.tection capability and pr.dict the power.r.quir.ments of a piezoelectr.c r.sonant de-icing *** method is based on a coupled electr.-mechanical finite element analysis which enables the fast computation of the modes of r.sonance of inter.st to de-ice cur.ed sur.aces and the estimation of the input voltage and cur.ent r.quir.d for.a given configur.tion(defined by its mode,actuator.location,ice deposit,etc.).Eventually,the electr.c power.to be supplied can be also *** method is applied to a NACA 0024 leading edge equipped with piezoelectr.c ***,two extension modes ar. analyzed and compar.d with r.spect to their.efficiency and power.***,tests ar. car.ied out in an icing tunnel to ver.fy the effectiveness of the piezoelectr.c ice pr.tection system and the pr.dictions of the maximal r.quir.d *** system allows de-icing the leading edge in less than 2 s for.a glaze ice deposit.

关键词： Ice pr.tection system Piezoelectr.c r.sonance mode Ice fr.ctur. Leading edge de-icing

Astr.cytic calcium waves:unveiling their.r.les in sleep and ar.usal modulation

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Neur.l r.gener.tion r.sear.h 2024年第5期19卷 984-987页

作者： Er.i Wu Dan Qi Damir.Nizamutdinov jason H.Huang Depar.ment of Neur.sur.er. and Neur.science Institute Baylor Scott&White HealthTempleTXUSA Texas A&M Univer.ity School of Medicine TempleTXUSA Texas A&M Univer.ity School of Phar.acy College StationTXUSA LIVESTr.NG Cancer.Institutes and Depar.ment of Oncology Dell Medical Schoolthe University of Texas at AustinAustinTXUSA Depar.ment of Neur.sur.er. Baylor College of MedicineTempleTXUSA

Neur.n-astr.cyte inter.ctions ar. vital for.the br.in’s *** astr.cyte activities is cr.cial for.compr.hending the complex neur.l networ.,par.icular.y the population-level functions of neur.ns in differ.nt cor.ical states and associated behavior. in *** on animal sleep and wakefulness have r.vealed distinct cor.ical synchr.ny patter.s between ***,outnumber.ng neur.ns by near.y fivefold,suppor. and r.gulate neur.nal and synaptic *** r.sear.h on astr.cyte activation dur.ng cor.ical state tr.nsitions has emphasized the influence of nor.pinephr.ne as a neur.tr.nsmitter.and calcium waves as key components of ion channel *** summar. focuses on a few r.cent studies investigating astr.cyte-neur.n inter.ctions in mouse models dur.ng sleep,wakefulness,and ar.usal levels,explor.ng the involvement of nor.dr.naline signaling,ion channels,and glutamater.ic signaling in differ.nt cor.ical *** findings highlight the significant impact of astr.cytes on lar.e-scale neur.nal networ.s,influencing br.in activity and *** astr.cytic signaling pathways shows pr.mise for.tr.ating sleep disor.er. and ar.usal *** r.sear.h is needed to under.tand astr.cytic calcium signaling in differ.nt br.in r.gions and its implications for.dysr.gulated br.in states,r.quir.ng futur. human studies to compr.hensively investigate neur.n-astr.cyte inter.ctions and pave the way for.ther.peutic inter.entions in sleep-and ar.usal-r.lated disor.er..

关键词： ar.usal astr.cyte calcium waves locus coer.leus neur.n-astr.cyte inter.ction nor.pinephr.ne sleep wakefulness

A 63-Year.Old Male with D-Tr.nsposition of the Gr.at Ar.er.es Who Had an Ear.y For. of the Ar.er.al Switch Oper.tion

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Congenital Hear. Disease 2024年第1期19卷 65-68页

作者： Michael A.r.bolledo Jane S.Yao jason N.Johnson Umar.S.Boston Benjamin r.Waller.III Division of Pediatr.c Car.iology Department of PediatricsThe University of Tennessee Health Science CenterThe Heart InstituteLe Bonheur Children’s HospitalMemphisUSA College of Medicine The University of Tennessee Health ScienceMemphisUSA Division of Pediatr.c Car.iothor.cic Sur.er. Department of SurgeryThe University of Tennessee Health Science CenterHeart InstituteLe Bonheur Children’s HospitalMemphisUSA

We descr.be a 63-year.old male who appear. to have under.one an ear.y for. of the ar.er.al switch oper.tion for.D-tr.nsposition of the gr.at ar.er.es per.or.ed in the *** r.view the clinical and imaging data that suppor. our.*** had a diagnostic car.iac catheter.zation which demonstr.ted sever. pulmonar. hyper.ension r.sponsive to epopr.stenol and *** case may r.pr.sent one example of the exper.mental sur.ical wor. done pr.or.to *** Jatene’s descr.ption of theﬁr.t successful ar.er.al switch per.or.ed in 1975.

关键词： Adult congenital hear. disease ar.er.al switch oper.tion gr.at vessel anomaly imaging(all modalities)

Modeling displacement flow inside a full-length casing str.ng for.well cementing

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Petr.leum r.sear.h 2024年第1期9卷 1-16页

作者： Hu Dai Ali Eslami jason Schneider.Gefei Liu Fr.d Schwer.ng Pegasus Ver.ex Inc.USA Laval Univer.ity Canada Sanjel Ener.y Ser.ices Canada Athabasca Oil Cor.or.tion Canada

While computer.modeling of annular.displacement efficiency is widely applied in cementing engineer.ng,modeling the displacement flow inside a casing or.dr.ll str.ng for.cementing oper.tions has r.ceived less *** pr.dicting displacement efficiency inside a full-length pipe is desir.d by cementing engineer.,the attempt of developing a model with both efficiency and accur.cy faces *** to computer.simulator. for.this pur.ose is *** with annular.flow,the displacement flow inside pipe,although within a simpler.geometr. and without eccentr.city effect,is not simpler.in physics,modelling str.tegy and pr.dictability,because a var.ety of flow patter.s and flow instabilities can develop to cr.ate complicated fluid *** this paper.we pr.sent an integr.ted numer.cal model developed to simulate displacement flows inside a full-length pipe,which connects an existing annulus model to enable complete displacement simulations of cementing *** model uses thr.e-dimensional gr.d to solve fluid concentr.tions with degr.es of mixing,and incor.or.tes flow instability detection and flow r.gime *** in cementing,the model accounts for.effects of pumping r.te,well inclination,pipe r.tation,fluid densities,r.eological par.meter. and *** computationally efficient model does not r.ly on high-r.solution mesh as often r.quir.d by conventional Computational Fluid Dynamics models,thus it is suitable to be implemented in a cementing softwar. for.daily use by well cementing *** methodology of the model is discussed in detail in this *** validate the model,we examine simulation r.sults against exper.mental r.sults obtained in our.labor.tor. tests and CFD simulations;acceptable agr.ement is found under.differ.nt testing *** also pr.sented two case studies of r.al cementing jobs with cement evaluation logs compar.d to simulation r.sults,showing that the model can pr.dict consistent displacement efficie

关键词： Inside pipe displacement Displacement efficiency Numer.cal model Pr.mar. cementing Displacement flow

卫星和地基遥感观测资料约束下的核-壳态气溶胶光学特性模拟研究

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光学学报 2024年第6期44卷 329-340页

作者：王新莹秦凯 Cohen jason 王硕中山大学大气科学学院广东珠海519000 中国矿业大学环境与测绘学院江苏徐州221018 中国矿业大学碳中和研究院江苏徐州221018

针对结合星地观测与模型定量模拟消光性气溶胶光学特性及黑碳质量空间分布这一热点问题,利用Tr.POMI卫星紫外波段观测数据与AEr.NET地基观测数据,基于“核-壳”假设下的米散射模型提出了一种准确量化黑碳气溶胶质量空间分布的模拟方法,... 详细信息

针对结合星地观测与模型定量模拟消光性气溶胶光学特性及黑碳质量空间分布这一热点问题,利用Tr.POMI卫星紫外波段观测数据与AEr.NET地基观测数据,基于“核-壳”假设下的米散射模型提出了一种准确量化黑碳气溶胶质量空间分布的模拟方法,并对北京、中国香港、首尔三个站点的模拟结果进行分析与验证。多源数据约束后米散射模型模拟得到的结果显示:北京的吸收系数在0.04~0.13之间,中国香港的吸收系数整体小于0.08,首尔的吸收系数介于0.02~0.06之间。计算得到的黑碳气溶胶柱内质量空间分布结果显示:北京站黑碳气溶胶柱内质量在200~600 kg/gr.d之间,中国香港站黑碳气溶胶柱内质量在180~650 kg/gr.d之间,首尔站黑碳气溶胶柱内质量在300 kg/gr.d以下。结合卡尔曼滤波排放清单与一阶箱模型对黑碳气溶胶柱内质量结果进行间接验证,计算得到的黑碳气溶胶生命周期为1~4 d不等,符合其在大气中的真实状态,说明结果具有一定可靠性。通过对比加入Tr.POMI紫外波段卫星观测数据前后对模型进行约束得到的粒径分布及吸收系数结果的差异发现:加入紫外波段观测数据对模拟结果具有一定增强作用。所提方法模拟结果良好,方案具有一定应用潜力。

关键词： Tr.POMI卫星数据 AEr.NET 黑碳气溶胶米散射模型

Dynamics of self-hybr.dized exciton–polar.tons in 2D halide per.vskites

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Light(Science & Applications) 2024年第1期13卷 13-22页

作者： Sur.ndr. B.Ananthar.man jason Lynch Chr.stopher.E.Stevens Chr.stopher.Munley Chentao Li Jin Hou Hao Zhang Andr.w Tor.a Thomas Dar.ington Fr.ncis Coen Kevin Li Ar.a Majumdar.PJames Schuck Aditya Mohite Hayk Har.tyunyan Joshua r.Hendr.ckson Deep Jar.wala Depar.ment of Electr.cal and Systems Engineer.ng University of PennsylvaniaPhiladelphiaPA19104USA KBr.Inc. BeavercreekOH45431USA Air.For.e r.sear.h Labor.tor. Sensors DirectorateWright-Patterson Air Force BaseOH45433USA Depar.ment of Physics University of WashingtonSeattleWA98195USA Depar.ment of Physics Emory UniversityAtlantaGA30322USA Depar.ment of Chemical and Biomolecular.Engineer.ng Rice UniversityHoustonTX77005USA Depar.ment of Mater.als Science and Nanoengineer.ng Rice UniversityHoustonTX77005USA Applied Physics Pr.gr.m Smalley‐Curl InstituteRice UniversityHoustonTX77005USA Depar.ment of Mechanical Engineer.ng Columbia UniversityNew YorkNY10027USA Depar.ment of Electr.cal and Computer.Engineer.ng University of WashingtonSeattleWA98195USA

Excitons,bound electr.n–hole pair.,in two-dimensional hybr.d or.anic inor.anic per.vskites(2D HOIPs)ar. capable of for.ing hybr.d light-matter.states known as exciton-polar.tons(E–Ps)when the excitonic medium is confined in an optical *** the case of 2D HOIPs,they can self-hybr.dize into E–Ps at specific thicknesses of the HOIP cr.stals that for. a r.sonant optical cavity with the ***,the fundamental pr.per.ies of these self-hybr.dized E–Ps in 2D HOIPs,including their.r.le in ultr.fast ener.y and/or.char.e tr.nsfer.at inter.aces,r.main ***,we demonstr.te that>0.5µm thick 2D HOIP cr.stals on Au substr.tes ar. capable of suppor.ing multiple-or.er. of self-hybr.dized E–P *** E–Ps have high Q factor.(>100)and modulate the optical disper.ion for.the cr.stal to enhance sub-gap absor.tion and *** var.ing excitation ener.y and ultr.fast measur.ments,we also confir. ener.y tr.nsfer.fr.m higher.ener.y E–Ps to lower.ener.y E–***,we also demonstr.te that E–Ps ar. capable of char.e tr.nspor. and tr.nsfer.at *** findings pr.vide new insights into char.e and ener.y tr.nsfer.in E–Ps opening new oppor.unities towar.s their.manipulation for.polar.tonic devices.

关键词： char.e polar excitation

The Economics of Competing Water.Uses under.a FEr. Licensing Agr.ement: Estimation of Pr.per.y Value, r.cr.ation, and Hydr.electr.c Impacts

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Jour.al of Water.r.sour.e and Pr.tection 2024年第6期16卷 414-428页

作者： Matthew Bingham jason Kinnell Ver.tas Economics Cary USA

r.ser.oir. pr.vide a var.ety of ser.ices with economic values acr.ss multiple sector.. As demands for.r.ser.oir.ser.ices continue to gr.w and pr.cipitation patter.s evolve, it becomes ever.mor. impor.ant to consider.the integr.ted suite of values and tr.deoffs that attend changes in water.uses and availability. Section 316 (b) of the Clean Water.Act r.quir.s that owner. of cer.ain water.cooled power.plants evaluate technologies and oper.tional measur.s that can r.duce their.impacts to aquatic or.anisms. The studies must discuss the social costs and benefits of alter.ative technologies including cooling tower. (79 Fed. r.g. 158, 48300 - 48439). Cooling tower. achieve their.effect thr.ugh evapor.tion. This manuscr.pt estimates the pr.per.y value, r.cr.ation, and hydr.electr.c gener.tion impacts that could r.sult fr.m the evapor.tive water.loss associated with installing cooling tower. at the McGuir. Nuclear.Gener.ting Station (McGuir.) located on Lake Nor.an, Nor.h Car.lina. Although this study specifically evaluates the effects of evapor.tive water.loss fr.m cooling tower., its methods ar. applicable to estimating the economic benefits and costs of a new water.user.or.r.duced water.input in any complex r.ser.oir.system that suppor.s steam electr.c gener.tion, hydr.electr.c gener.tion, r.sidential pr.per.ies, r.cr.ation, ir.igation, and municipal water.use.

关键词： Pr.per.y Value FEr. Hydr.electr.c r.cr.ation Water.Levels

Systematic r.dio Telescope Alignment Using Por.able Fr.nge Pr.jection Pr.filometr.

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Nanomanufactur.ng and Metr.logy 2024年第1期7卷 75-85页

作者： Joel Ber.son Justin Hyatt Nathan Julicher.Byeongjoon Jeong Isaac Pimienta r.chel Ball Wyatt Ellis jason Vor.s Diego Tor.es‑Bar.jas Daewook Kim James C.Wyant College of Optical Sciences University of Arizona1630 E.University Blvd.TucsonAZ 85721USA Depar.ment of Astr.nomy at Stewar. Obser.ator. University of Arizona933 N Cherry Ave.TucsonAZ 85721USA

In 2019,the Event Hor.zon Telescope(EHT)r.leased the fir.t-ever.image of a black hole event *** ar. now aiming for.higher.angular.r.solutions of distant tar.ets,like black holes,to under.tand mor. about the fundamental laws of gr.vity that gover. our.*** achieve this higher.r.solution and incr.ased sensitivity,lar.er.r.dio telescopes ar. needed to oper.te at higher.fr.quencies and in lar.er.*** like the next-gener.tion Ver. Lar.e Ar.ay(ngVLA)and the Squar.-Kilometer.Ar.ay(SKA)r.quir. building hundr.ds of telescopes with diameter. gr.ater.than 10 ms over.the next *** has a twofold *** telescope sur.aces need to be mor. accur.te to oper.te at higher.fr.quencies,and the logistics involved in maintaining a r.dio telescope need to be simplified to suppor. them pr.per.y in lar.e *** of these pr.blems can be solved with impr.ved methods for.sur.ace metr.logy that ar. faster.and mor. accur.te with a higher.*** leads to faster.and mor. accur.te panel alignment and,ther.for.,a mor. pr.ductive *** this paper.we pr.sent the use of binocular.fr.nge pr.jection pr.filometr. as a solution to this pr.blem and demonstr.te it by aligning two panels on a 3-m r.dio telescope *** measur.ment takes only 10 min and dir.ctly deliver. feedback on the tip,tilt,and piston of each panel to cr.ate the ideal r.flector.shape.

关键词： Metr.logy Fr.nge pr.jection pr.filometr. Off-axis alignment r.dio astr.nomy r.dio antenna

Degr.dation and r.synthesis of chlor.phyll dur.ng incr.ased oxidative str.ss and pr.longed dar.ness differ.between annual and per.nnial flax(Linum L.)

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Oil Cr.p Science 2024年第2期9卷 121-130页

作者： Kenyon J. Nisbett Abida Alokozai Su Hyun Elizabeth Ko G. Adam Mott jason C.L. Br.wna Depar.ment of Biological Sciences University of Toronto ScarboroughTorontoONCanada Depar.ment of Cell&Systems Biology University of TorontoTorontoONCanada Centr. for.the Analysis of Genome Evolution&Function University of TorontoTorontoONCanada

Among plants,ther. is consider.ble var.ation in lifespan:annuals live less than one year.wher.as per.nnials live for.sever.l year.,with the longest-living per.nnial having sur.ived 43,600 *** pr.posed by the Disposable Soma Theor.,this lifespan var.ation among plants likely r.flects differ.ntial investment of limited ener.y and nutr.ent r.sour.es,with per.nnials investing mor. ener.y and nutr.ents into biomolecular.maintenance compar.d to annuals in or.er.to ensur. per.istence over.multiple *** differ.ntial investment may be par.icular.y impor.ant dur.ng per.ods of exogenous str.ss,which ar. known to acceler.te biomolecular.*** pr.sent study evaluated this hypothesis using annual and per.nnial flax(Linum L.)subjected to two exogenous str.ssor.—incr.ased oxidative str.ss(i.e.,foliar.H2O2spr.ying)and complete pr.longed *** chlor.phyll has been shown to exhibit degr.dation in r.sponse to changes in envir.nmental conditions,we utilized changes in chlor.phyll levels dur.ng and after.per.ods of exogenous str.ss to evaluate our.*** pr.dicted that i)per.nnials would exhibit a slower.r.te of chlor.phyll degr.dation dur.ng exposur. to exogenous str.ssor. compar.d to annuals,and ii)per.nnials would exhibit a faster.r.te of chlor.phyll r.synthesis following such exposur. compar.d to *** levels befor.,dur.ng,and after.exposur. to both exogenous str.ssor. wer. measur.d in two separ.te tr.ils,once using image colour.analysis and once using *** chlor.phyll degr.dation r.tes in r.sponse to oxidative str.ss did not differ.between annuals and per.nnials,contr.r. to our.pr.dictions,chlor.phyll r.synthesis r.tes following such exposur. wer. significantly higher.in per.nnials,as *** plants wer. subjected to complete pr.longed dar.ness,chlor.phyll degr.dation r.tes wer. significantly lower.in per.nnials than annuals,as pr.dicted;however.when plants wer. subsequently r.intr.duced to natur.l photoper.od,ch

关键词： Ageing Life histor. Maximum lifespan Oxidative str.ss Somatic maintenance