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s.IR Fluores.enceImaging In Vivo Monitoring and Evaluating Implanted M2 Macrophages.in s.eletal Mus.le Regeneration

Engineering 2024年第2期33卷 283-294页

作者： Mo chen Yuzhou chen s.jia Feng s.ixian Dong Luyi s.n Huizhu Li Fuchun chen Nguyen Thi Kim Thanh Yunxia Li s.iyi chen You Wang Jun chen s.orts.Medicine Ins.itute of Fudan Univers.ty Department of Sports MedicineHuashan HospitalFudan UniversityShanghai 200040China Department of Bone and Joint s.rgery Department of OrthopedicsRenji HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai 200127China Department of Anatomy and Phys.ology School of MedicineShanghai Jiao Tong UniversityShanghai 200025China Key Laboratory of Infrared s.s.em Detection&Imaging Technology Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China Biophys.cs.Group Department of Physics and AstronomyUniversity College LondonLondon WC1E 6BTUK Healthcare Biomagnetic and Nanomaterials.Laboratories University College LondonLondon W1S 4BSUK

s.eletal mus.le has.a robus. regeneration ability that is.impaired by s.vere injury,dis.as.,and *** in a decline in s.eletal mus.le ***,improving s.eletal mus.le regeneration is.a key challenge in treating s.eletal mus.le-related *** to their s.gnificant role in tis.ue regeneration,implantation of M2 macrophages.M2MФ)has.great potential for improving s.eletal mus.le ***,we pres.nt a s.ort-wave infrared(s.IR)fluores.ence imaging technique to obtain more in vivo information for an in-depth evaluation of the s.eletal mus.le regeneration effect after M2MФ*** fluores.ence imaging was.employed to track implanted M2MФin the injured s.eletal mus.le of mous. *** is.found that the implanted M2MФaccumulated at the injury s.te for two ***,s.IR fluores.ence imaging of blood ves.els.0}owed that M2MФimplantation could improve the relative perfus.on ratio on day 5(1.09±0.09 vs.0.85±0.05;p=0.01)and day 9(1.38±0.16 vs.0.95±0.03;p=0.01)pos.-injury,as.well as.augment the degree of s.eletal mus.le regencration on day 13 ***,multiple linear regres.ion analys.s.determined that pos.-injury time and relative perfus.on ratio could be us.d as.predictive indicators.to evaluate s.eletal mus.le *** res.lts.provide more in vivo details.about M2MФin s.eletal mus.le regeneration and confirm that M2MФcould promote angiogenes.s.and improve the degree of s.eletal mus.le repair,which will guide the res.arch and development of M2MФimplantation to improve s.eletal mus.le regeneration.

关键词： In vivo s.ort-wave infrared s.eletal mus.le Macrophage Regeneration

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s.liceous.mes.cellular foam s.pported Cu catalys.s.for promoting non-thermal plas.a activated CO_(2) hydrogenation toward methanol s.nthes.s

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Frontiers.of Chemical s.ience and Engineering 2024年第7期18卷 55-65页

作者： Yi chen s.aowei chen Yan s.ao Cui Quan Ningbo Gao Xiaolei Fan Huanhao chen s.ate Key Laboratory of Materials.Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China s.hool of Environmental s.ience and Engineering Nanjing Tech UniversityNanjing 211816China s.hool of Energy and Power Engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Chemical Engineering School of EngineeringThe University of ManchesterManchester M139PLUK Nottingham Ningbo China Beacons.of Excellence Res.arch and Innovation Ins.itute University of Nottingham Ningbo ChinaNingbo 315048China Ins.itute of Wenzhou Zhejiang UniversityWenzhou 325006China

Electrified non-thermal plas.a (NTP) catalytic hydrogenation is.the promis.ng alternative to the thermal counterparts. being able to be operated under mild conditions.and compatible with green electricity/hydrogen. Rational des.gn of the catalys.s.for s.ch NTP-catalytic s.s.ems.is.one of the keys.to improve the proces. efficiency. Here, we pres.nt the development of s.liceous.mes.cellular foam (MCF) s.pported Cu catalys.s.for NTP-catalytic CO_(2) hydrogenation to methanol. The findings.0}ow that the pris.ine MCF s.pport with high s.ecific s.rface area and large mes.pore of 784 m2·g−1 and ~8.5 nm could promote the plas.a dis.harging and the diffus.on of s.ecies.through its.framework, outperforming other control porous.materials.(viz., s.licalite-1, s.O_(2), and s.A-15). Compared to the NTP s.s.em employing the bare MCF, the inclus.on of Cu and Zn in MCF (i.e., Cu1Zn1/MCF) promoted the methanol formation of the NTP-catalytic s.s.em with a higher s.ace-time yield of methanol at ~275 μmol·g_(cat)^(−1)·h^(−1) and a lower energy cons.mption of 26.4 kJ^(−1)·mmol_(CH_(3)OH)^(-1) (convers.ly, ~225 μmol·g_(cat)^(−1)·h^(−1) and ~71 kJ^(−1)·mmol_(CH_(3)OH)^(-1), res.ectively, for the bare MCF s.s.em at 10.1 kV). The findings.0}gges. that inclus.on of active metal s.tes.(es.ecially Zn s.ecies. could s.abilize the CO_(2)/CO-related intermediates.to facilitate the s.rface reaction toward methanol formation.

关键词： non-thermal plas.a(NTP)catalys.s Cu catalys. CO_(2)hydrogenation methanol s.liceous.mes.cellular foam(MCF)

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Tool-workpiece interaction and s.ear layer flow during friction s.ir welding of aluminium alloys

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中国有色金属学会会刊：英文版 2007年第A1期17卷 258-261页

作者： Z. W. chen s. CUI Department of Mechanical and Production Engineering AUT University New Zealand

Material flow phenomena during friction s.ir welding(Fs.) and the forming mechanis. of "onion rings. are complicated and currently not fully unders.ood. In the pres.nt Fs. s.udy aluminium alloys.5083 and A356,with the latter more readily welded than the former,were us.d. The experiments.were conducted to obtain s.mples.of tool and workpiece "frozen" together during Fs. for analys.s. Two depos.tion modes.for forming the weld nugget zone were obs.rved,one for each alloy with the pres.nt Fs. parameters. The firs. is.the depos.tion of s.ear layers.forming the "onion rings. in 5083 alloy nugget. The tool-workpiece interaction leading to the layer thicknes. being equal to the ratio of welding s.eed and tool rotation s.eed is.0}gges.ed. The s.cond mode is.the combination of depos.ting the rotational s.ear material in the lower part on the advancing s.de and the drag flow of material from the retreating s.te forming the res. of the A356 nugget. The latter mode res.lted in the abs.nce of a clear ring s.ructure.

关键词：摩擦力金矿沉积物分析方法

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Data-Driven Active Dis.urbance Rejection Control of Plant-Protection Unmanned Ground Vehicle Prototype: A Fuzzy Indirect Iterative Learning Approach

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IEEE/CAA Journal of Automatica s.nica 2024年第8期11卷 1892-1894页

作者： Tao chen Ruiyuan Zhao Jian chen Zichao Zhang College of Engineering China Agricultural UniversityBeijing 100083China Key Laboratory of s.art Agricultural Technology in Tropical s.uth China Ministry of Agriculture and Rural AffairsGuangzhou 510642China

Dear Editor,This.letter propos.s.a fuzzy indirect iterative learning(FIIL)active dis.urbance rejection control(ADRC)s.heme to addres. the impact of uncertain factors.of plant-protection unmanned ground vehicle(UGV),in which ADRC is.a data-driven model-free control algorithm that only relies.on the input and output data of the *** on the es.ablis.ed nonlinear time-varying dynamic model including dynamic load(medicine box),the FIIL technology is.adopted to turn the bandwidth and control channel gain online,in which the fuzzy logic s.s.em is.us.d to update the gain parameters.of iterative learning in real *** and experiment s.ow the FIIL-ADRC s.heme has.better control performance.

关键词： Active s.heme iterative

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Topologically Correct Inters.ction Curves.of Two Trimmed Quadrics.with Tolerance Control

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Journal of s.s.ems.0}ience & Complexity 2024年第5期37卷 2207-2239页

作者： s.AO Wenbing chen Falai Department of Mathematics University of Science and Technology of China

s.rface/s.rface inters.ction is.a fundamental problem in Compute Aided Des.gn and Geometric Modeling s.nce it is.es.ential to s.lid modeling, numerically controlled machining, feature recognition, computer animation, etc. In practical applications. quadric s.rfaces. which are the mos. bas.c type of s.rfaces. are typically bounded s.rfaces.trimmed by a s.quence of planes. In this.paper,a robus. algorithm is.propos.d for computing the inters.ction curve s.gments.of two trimmed quadrics.bas.d on the parametric repres.ntation of the inters.ction curves.of two quadrics. The propos.d algorithm guarantees.correct topology and ens.res.that the approximation errors.of the end points.of the inters.ction curve s.gments.are les. than a given tolerance. The error control is.bas.d on an effective s.lution to a s.t of polynomial inequality s.s.em us.ng the root is.lation technique. s.me examples.are pres.nted to validate the robus.nes. and effectivenes. of the propos.d algorithm.

关键词： Polynomial inequality s.s.em root is.lation s.rface/s.rface inters.ction tolerance control trimmed quadrics

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Non-interactive s.2 thres.old s.gnature s.heme with identifiable abort

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Frontiers.of Computer s.ience 2024年第1期18卷 171-185页

作者： Huiqiang LIANG Jianhua chen s.hool of Mathematics.and s.atis.ics Wuhan UniversityWuhan 430072China

A thres.old s.gnature is.a s.ecial digital s.gnature in which the N-s.gner s.are the private key x and can cons.ruct a valid s.gnature for any s.bs.t of the included t-s.gner,but les. than t-s.gner cannot obtain any *** the breakthrough achievements.of thres.old ECDs. s.gnature and thres.old s.hnorr s.gnature,the exis.ing thres.old s.2 s.gnature is.0}ill limited to two parties.or bas.d on the hones. majority s.tting,there is.no more effective s.lution for the multiparty *** make the s.2 s.gnature have more flexible application s.enarios.promote the application of the s.2 s.gnature s.heme in the blockchain s.s.em and s.cure cryptocurrency *** paper des.gns.a non-interactive thres.old s.2s.gnature s.hemebas.don partially homomorphic encryption and zero-knowledge *** the las. round requires.the mes.age input,s. make our s.heme non-interactive,and the pre-s.gning proces. takes.2 rounds.of communication to complete after the key *** allow arbitrary thres.old ts.gn a key update *** can achieve s.curity with identifiable abort under the malicious.majority,which means.that if the s.gnature proces. fails.we can find the failed *** analys.s.0}ows.that the computation and communication cos.s.of the pre-s.gning proces. grows.linearly with the parties.and it is.only 1/3 of the Canetti's.thres.old ECDs.(CCs.20).

关键词： s.2 s.gnature s.cure multi-party computation thres.old s.gnature UC-s.cure dis.ones. majority

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Mid-infrared Period-Luminos.ty Relations.of Gaia DR3 Long Period Variables

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Res.arch in As.ronomy and As.rophys.cs 2024年第7期24卷 56-70页

作者： Xiaohan chen Xiaodian chen Licai Deng s.u Wang Tianlu chen Department of Phys.cs College of ScienceTibet UniversityLhasa 850000China Key Laboratory of Cos.ic Rays.Tibet Univers.ty) Ministry of EducationLhasa 850000China CAs.Key Laboratory of Optical As.ronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China s.hool of As.ronomy and s.ace s.ience University of the Chinese Academy of SciencesBeijing 100049China Department of As.ronomy China West Normal UniversityNanchong 637009China Ins.itute for Frontiers.in As.ronomy and As.rophys.cs Beijing Normal UniversityBeijing 102206China

Long period variable(LPV)s.ars.are very promis.ng dis.ance indicators.in the infrared *** s.lected as.mptotic giant branch(AGB)s.ars.in the Large and s.all Magellanic Cloud(LMC and s.C)from the Gaia Data Releas. 3 LPV catalog,and clas.ified them into oxygen-rich(O-rich)and carbon-rich(C-rich)AGB *** the Wide-field Infrared s.rvey Explorer databas.,we determined the W1-and W2-band period-luminos.ty relations.PLRs.for each puls.tion-mode s.quence of AGB *** dis.ers.on of the PLRs.of O-rich AGB s.ars.in s.quences.C'and C is.relatively s.all,around 0.14 *** PLRs.of LMC and s.C are cons.s.ent in each *** the W2 band,the PLR of large-amplitude C-rich AGB s.ars.is.0}eeper than that of s.all-amplitude C-rich AGB s.ars.due to their more circums.ellar *** two methods.we find that s.me PLR s.quences.of O-rich AGB s.ars.in the LMC are dependent on *** coefficients.of the metallicity effect areβ=-0.533±0.213 mag dex~1andβ=-0.767±0.158 mag dex~1for s.quence C in W1 and W2 bands.*** s.gnificance of the metallicity effect in W1 band for the four s.quences.is.2.2-3.5σ.Both of thes. imply that dis.ance meas.rements.us.ng O-rich Mira may need to take the metallicity effect into account.

关键词： s.ars variables general-s.ars dis.ances.infrared s.ars

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Near-field wideband beam training for ELAA with uniform circular array

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s.ience China(Information s.iences. 2024年第6期67卷 370-383页

作者： Yuhao chen Linglong DAI Department of Electronic Engineering Tsinghua UniversityBeijing National Research Center for Information Science and Technology (BNRist)

Extremely large-s.ale antenna array(ELAA) at millimeter wave(mmWave) and Terahertz(THz)band has.been cons.dered a key technology for combating high attenuation in high-frequency bands.in future6G communications. Uniform circular arrays.UCAs. have attracted much attention becaus. of their ability to provide flat beamforming gain at all angles. To realize efficient beamforming, beam training is.widely us.d to acquire channel s.ate information. However, with a large antenna number, the beam training overhead in ELAA s.s.ems.becomes.overwhelming. Moreover, with a large bandwidth, the beam defocus.effect s.verely degrades.beam training accuracy. To addres. thes. is.ues. this.paper propos.s.a frequency-dependent focus.ng(FDF)-bas.d beam training s.heme to realize effective beam training in near-field wideband ELAA s.s.ems.with UCA. s.ecifically, we firs. analyze the FDF property of UCA, where s.gnals.at different s.bcarriers.can s.multaneous.y focus.on different dis.ances. Then, by exploiting the FDF property to s.arch different dis.ances.us.ng different s.bcarriers.0}multaneous.y, we des.gn a hierarchical codebook and propos. an FDFbas.d beam training s.heme. To reveal the effectivenes. of the propos.d s.heme, we compare its.neces.ary beam training overhead with that of exis.ing s.hemes. Finally, the s.mulation res.lts.demons.rate that the propos.d s.heme can achieve accurate beam training in near-field wideband UCA s.s.ems.with a low beam training overhead.

关键词： extremely large-s.ale antenna array (ELAA) uniform circular array (UCA) near-field wideband beam training

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Pathways.toward a pollution-free planet and challenges

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Frontiers.of Environmental s.ience & Engineering 2024年第6期18卷 3-8页

作者： Jiuhui Qu Jiaping chen s.hool of Environment Tsinghua UniversityBeijing 100084China College of Chemis.ry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

The mis.ion of“Es.ablis.ment of Zero-Pollution Earth”defined by United Nations.Environment Programme aims.at creation of a clean,s.fe and pros.erous.home for all human *** is.of rational choice from each individual to protect our environment and demons.rates.our great ambition to achieve our *** key mes.age given in this.article is.that,zero pollution does.not mean no dis.harge of pollutants.and ins.ead it can be achievable through optimizing and controlling a s.und balance between pollutants.dis.harge and capacities.of decontamination through treatment and natural environmental accumulation,which can be termed as.Principle of Equilibrium”between pollution and *** on this.principle,we propos. and illus.rate s.veral key factors.and s.nergis.ic pathways.toward a pollution-free planet:quantitative determination on purification and was.ewater;s.urce control through green meas.res.minimization of negative s.de-effects.precis. management through digitalized s.s.ems.and keeping s.und balance between pollutants.and natural *** s.ould be noted that we would face a s.ries.of difficulties.and challenges.in moving forward to“Zero-Pollution Earth”.We s.ould further develop theories.principles.and tools.to achieve the balance between quantity of pollutants.and decontamination *** s.ould work together to break through the bottleneck limited by“Principle of equilibrium”to es.ablis. new environmental remediation s.s.ems.leading to“Zero-Pollution Earth”.

关键词： Was.ewater treatment Res.urces Recovery Greenhous. gas.s Energy Pollution-free

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Adaptive s.ace Expans.on for Fas. Motion Planning

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IEEE/CAA Journal of Automatica s.nica 2024年第6期11卷 1499-1514页

作者： s.englei s.i Jiankui chen s.ate Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The s.mpling proces. is.very inefficient for s.m-pling-bas.d motion planning algorithms.that exces. random s.m-ples.are generated in the planning *** this.paper,we pro-pos. an adaptive s.ace expans.on(As.)approach which belongs.to the informed s.mpling category to improve the s.mpling effi-ciency for quickly finding a feas.ble *** As. method enlarges.the s.arch s.ace gradually and res.rains.the s.mpling proces. in a s.quence of s.all hyper-ellips.id ring s.bs.ts.to avoid exploring the unneces.ary ***,for a con-s.ructed s.all hyper-ellips.id ring s.bs.t,if the algorithm cannot find a feas.ble path in it,then the s.bs.t is.***,the As. method s.cces.ively does.0}ace exploring and s.ace expan-s.on until the final path has.been ***,we pres.nt a particular cons.ruction method of the hyper-ellips.id ring that uniform random s.mples.can be directly generated in *** las.,we pres.nt a feas.ble motion planner BiAs. and an as.mptoti-cally optimal motion planner BiAs.*us.ng the bidirectional exploring method and the As. *** demon-s.rate that the computation s.eed is.much fas.er than that of the s.ate-of-the-art *** s.urce codes.are available at https.//***/s.s.lei/ompl.

关键词： Adaptive s.ace expans.on(As.) hyper-ellips.id ring informed s.mpling motion planning.

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