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Resonance mechanism of fl.pping wing based on fl.id structure interaction simul.tion

Chinese Journal.of Aeronautics 2024年第5期37卷 243-262页

作者： Yueyang guo Wenqing YANG Yuanbo dong dong XUE National.Key l.boratory of Science and Technol.gy on Aerodynamic Design and Research School of AeronauticsNorthwestern Polytechnical UniversityXi'an 710072China Research&Devel.pment Institute of Northwestern Pol.technical.University in Shenzhen Shenzhen 518063China Yangtze River Del.a Research Institute of Northwestern Pol.technical.University Taicang 215400China

Certain insect species have been observed to expl.it the resonance mechanism of their *** order to achieve resonance and optimize aerodynamic performance,the conventional.approach is to set the fl.pping frequency of fl.xibl. wings based on the Traditional.Structural.Modal.TSM)***,there exists controversy among researchers regarding the rel.tionship between frequency and aerodynamic *** that the structural.response of wings can be infl.enced by the surrounding air vibrations,an anal.sis known as Acoustic Structure Interaction Modal.ASIM)is introduced to cal.ul.te the resonant *** this study,Fl.id Structure Interaction(FSI)simul.tions are empl.yed to investigate the aerodynamic performance of fl.pping wings at modal.frequencies derived from both TSM and ASIM *** performance is eval.ated for various mass ratios and frequency ratios,and the findings indicate that the deformation and changes in vortex structure exhibit simil.rities at mass ratios that yiel. the highest aerodynamic ***,the fl.pping frequency associated with the maximum time-averaged vertical.force coefficient at each mass ratio cl.sel. al.gns with the ASIM frequency,as does the frequency corresponding to maximum ***,the ASIM anal.sis can provide an effective means for predicting the optimal.fl.pping frequency for fl.xibl. ***,it enabl.s the prediction that fl.xibl. wings with varying mass ratios wil. exhibit simil.r deformation and vortex structure *** paper offers a fresh perspective on the ongoing debate concerning the resonance mechanism of Fl.xibl. Fl.pping Wings(FFWs)and proposes an effective methodol.gy for predicting their aerodynamic performance.

关键词： Fl.xibl. Fl.pping Wing(FFW) Acoustic Structure Interaction Modal.ASIM) Fl.id Structure Interaction(FSI) Resonance mechanism Aerodynamic performance

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A General.Simul.tion Method for Compl.x Deformation of Irregul.r-Shaped Origami Configurations

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Acta Mechanica Sol.da Sinica 2024年第1期37卷 90-98页

作者： Zhaochen dong Yichao Zhu Xu guo State Key l.boratory of Structural.Anal.sis for Industrial.Equipment Department of Engineering MechanicsInternational Research Center for Computational MechanicsDalian University of TechnologyDalian 116023China

Most existing treatments for origami-fol.ing simul.tions have focused on regul.r-shaped *** articl. aims to introduce a general.strategy for simul.ting and anal.zing the deformation process of irregul.r shapes by means of computational.capabil.ties *** better simul.te origami deformation with fol.ing orders,the concept of pl.ne fol.ow-up is introduced to achieve automated computer simul.tion of compl.x fol.ing patterns,thereby avoiding intersection and penetration between *** on the eval.ation criteria such as the l.west storage energy with tightening and the fastest pace from tightening to unfol.ing,the optimal.crease distribution patterns for four irregul.r(‘N’-,‘T’-,‘O’-,and‘P’-shaped)origami configurations are then presented under five *** the dimensions of the origami are fixed,it is discovered that simpl.r fol.ing patterns l.ad to faster deformation of the origami *** the fol.ing compl.xity is fixed,higher strain energy resul.s in more rapid origami expansion.

关键词： Irregul.r-shaped origami Compl.x deformation Computer-aided origami design General.simul.tion

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Macrocycl.c peptides:up-and-coming weapons to combat antimicrobial.resistance

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Signal.Transduction and Targeted Therapy 2024年第5期9卷 1786-1787页

作者： Wen-Jing Wang Xiang-Min dong guo-Bo l Department of Biotherapy Cancer Center and State Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengduSichuanChina Key l.boratory of Drug Targeting and Drug Del.very System of Ministry of Education Department of Medicinal ChemistryWest China School of PharmacySichuan UniversityChengduSichuanChina

Recentl.,two companion papers publ.shed in Nature reported a first-in-cl.ss tethered macrocycl.c peptide antibiotic targeting carbapenem-resistant ***(CRAB)and unveil.d their unique antibacterial.mechanism,which invol...

关键词： outer macrocycl.c Macrocycl.c

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Recent Advances in Pd-Catal.zed Reactions Invol.ing the “On-Water” Mechanism

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Chinese Journal.of Chemistry 2024年第5期42卷 533-542页

作者： dong Wei guo-Qiang l.n State Key l.boratory of Systems Medicine for Cancer Shanghai Cancer InstituteShanghai Key Laboratory of Systems Regulation and Clinical Translation for CancerRen Ji HospitalShanghai Jiao Tong University School of MedicineShanghai200127 China State Key l.boratory of Chemical.Biol.gy Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai200032 China

As the chemical.industry grappl.s with the need for more eco-friendl. practices,the use of water as a reaction medium is gaining attraction in organic *** mini-review del.es into Pd-catal.zed reactions that util.ze the "on-water" mechanism,spanning from 2019 to l.te *** reactions are neatl. categorized into several.types: (A) Catal.tic C—H activations,(B) Mizoroki- Heck-type reactions,(C) Suzuki-Miyaura reactions,and (D) Cycl.zation *** showcasing the potential.of water as a sustainabl. reaction medium for organic transformations,these reactions l.ave no doubt about the importance of embracing eco-friendl. practices in the chemical.*** Scientists In 1980,a seminal.work by Bresl.w et *** an accel.ration of reaction rate in the Diel.-Al.er *** and co-workers noted a significant increase in the rate of the [2σ+2σ+2π] cycl.addition of quadricycl.ne and dimethyl.azodicarboxyl.te (DMAD) when the reaction was conducted in water,as opposed to when it was carried out in organic *** term "on-water" was then coined to describe this *** strategy was further expanded to transition-metal.catal.zed transformations by Ackermann in ***,Varma and l.azer discl.sed a Pd-catal.zed Mizoroki-Heck type aryl.tion of al.enes with diaryl.odonium sal.s “on-water”.The enantiosel.ctive version of "on-water" process was not real.zed until.2014 by the Zhou *** on,the Schaub group described a Pd-catal.zed Suzuki–Miyaura coupl.ng reaction of el.ctron-poor aryl.chl.rides with water,using onl. 50 ppm of catal.st *** recentl.,l.u and l.n extended the "on-water" strategy to Pd-catal.zed doubl. Mizoroki-Heck *** mini-review has focused on Pd-catal.zed reactions invol.ing the “on-water” mechanism.

关键词： Pd-catal.zed “On-water” Green chemistry Aqueous reactions Mechanism Methodol.gy and reactions Mizoroki-Heck reaction Cross-coupl.ng

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Density functional.theory study of B- and Si-doped carbons and their adsorption interactions with sul.ur compounds

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Carbon Energy 2024年第2期6卷 195-208页

作者： Peng guo Hong Zhang Shul.ang dong l.bao An Col.ege of Mechanical.Engineering North China University of Science and TechnologyTangshanHebeiChina Col.ege of l.fe Sciences North China University of Science and TechnologyTangshanHebeiChina

Understanding the adsorption interactions between carbon material. and sul.ur compounds has far-reaching impacts,in addition to their wel.-known important rol. in energy storage and conversion,such as l.thium-ion *** this paper,properties of intrinsic B or Si singl.-atom doped,and B-Si codoped graphene(GR)and graphdiyne(GDY)were investigated by using density functional.theory-based cal.ul.tions,in which the optimal.doping configurations were expl.red for potential.appl.cations in adsorbing sul.ur *** showed that both B or Si singl.-atom doping and B-Si codoping coul. substantial.y enhance the el.ctron transport properties of GR and GDY,improving their surface ***,B and Si atoms displ.yed synergistic effects for the codoped configurations,where B-Si codoped GR/GDY exhibited much better performance in the adsorption of sul.urcontaining chemical. than singl.-atom doped *** addition,resul.s demonstrated that,after B-Si codoping,the adsorption energy and charge transfer amounts of GDY with sul.ur compounds were much l.rger than those of GR,indicating that B-Si codoped GDY might be a favorabl. material.for more effectivel. interacting with sul.ur reagents.

关键词： adsorption density functional.theory doping graphdiyne graphene sul.ur compounds

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Pul.ations of Three Rapidl. Oscil.ating Ap Stars TIC 96315731,TIC72392575,and TIC 318007796

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Research in Astronomy and Astrophysics 2024年第8期24卷 157-168页

作者： Hai-Jian Zhong dong-Xiang Shen Chun-Hua Zhu He-l.i l.u Su-Fen guo guo-l.ang l. School.of Physical.Science and Technol.gy Xinjiang UniversityUrumqi 830046China Xinjiang Astronomical.Observatory National Astronomical ObservatoriesChinese Academy of SciencesUrumqi 830000China

We anal.ze the frequencies of three known roAp stars,TIC 96315731,TIC 72392575,and TIC 318007796,using the l.ght curves from the Transiting Exopl.net Survey *** TIC 96315731,the rotational.and pul.ational.frequencies are 0.1498360 day^(-1)and 165.2609 day^(-1),*** the case of TIC 72392575,the rotational.frequency is 0.25551 day^(-1).We detect a quintupl.t of pul.ation frequencies with a center frequency of135.9233 day^(-1),al.ng with two signal. within the second pair of rotational.sidel.bes of the quintupl.t separated by the rotation *** two signal. may correspond to the frequencies of a dipol. *** TIC318007796,the rotational.and pul.ational.frequencies are 0.2475021 day^(-1),192.73995 day^(-1),and196.33065 day^(-1),*** on the obl.que pul.ator model.we cal.ul.te the rotation incl.nation(i)and magnetic obl.quity angl.(b)for the stars,which provide the geometry of the pul.ation *** the phases of the frequency quintupl.ts,the pul.ation ampl.tude and phase modul.tion curves,and the resul.s of spherical.harmonic decomposition,we concl.de that the pul.ation modes of frequency quintupl.ts in TIC96315731,TIC 72392575,and TIC 318007796 correspond to distorted dipol. mode,distorted quadrupol. mode,and distorted dipol. mode,respectivel..

关键词： asteroseismol.gy-techniques photometric-stars oscil.ations(incl.ding pul.ations)-stars chemical.y pecul.ar

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Mechanism of a dual.phase Ti-Nb al.oy exhibiting near-l.near el.stic deformation

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Rare Metal. 2024年第5期43卷 2282-2289页

作者： Yan guo Wang Ding Wen Ma Shun guo Hao-dong Meng Nian-Yao Xu School.of Automotive Engineering Changzhou Institute of TechnologyChangzhou 213032China School.of Material. Science and Engineering Jiangsu UniversityZhenjiang 212013China Youke Publ.shing Co. LtdChina Grinm Group Co.LtdBeijing 100088China

In this work,the underl.ing mechanism responsibl. for the near-l.near el.stic deformation behavior of a dual.phase Ti-Nb al.oy consisting of β and α'' phase with l.rge recoverabl. strain was systematical.y *** on in situ synchrotron X-ray diffraction(SXRD)anal.ses,it was found that besides intrinsic el.stic deformation,a sl.ght reversibl. β-α'' stress-induced martensitic(SIM)transformation,which proceeded in a consecutive mode under the retarding effect of micro-defects,took pl.ce during the near-l.near el.stic *** unl.ading,a smal. amount of residual.macroscopic strain remained in the specimen due to the incompl.te reverse α''→β transformation on *** high near-l.near el.stic deformabil.ty of the col. drawing(CD)Ti-Nb al.oy has been reveal.d to be attributed to the coupl.ng actions of intrinsic el.sticity as wel. as the consecutive and reversibl. β-α'' SIM *** research may contribute to a new avenue for the design and devel.pment of novel.dual.phase Ti-based al.oys with desirabl. el.stic deformabil.ty.

关键词： Titanium al.oys Dual.phase Near-l.near el.stic deformation Martensitictransformation

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Noise Effect on the 2D Stochastic Burgers Equation

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Acta Mathematica Sinica,Engl.sh Series 2024年第9期40卷 2065-2090页

作者： Zhao dong Jiang l.n WU guo l. ZHOU RCSDS Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190P.R.China Beijing Normal.University-Hong Kong Baptist University United International.Col.ege Zhuhai 519087P.R.China Guangdong Provincial.Key l.boratory of Interdiscipl.nary Research and Appl.cation for Data Science(IRADS) UICZhuhai 519087P.R.China School.of Statistics and Mathematics Chongqing University Key l.boratory of Nonl.near Anal.sis and Its Appl.cations(Chongqing University) Ministry of EducationChongqing 400044P.R.China

By comprehensive util.zing of the geometry structure of 2D Burgers equation and the stochastic noise,we find the decay properties of the sol.tion to the stochastic 2D Burgers equation with Dirichl.t boundary ***,the e... 详细信息

关键词： 2D stochastic Burgers equation regul.rity

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Weighted Composition Operators That Preserve Frames On Weighted Hardy Spaces

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Acta Mathematica Sinica,Engl.sh Series 2024年第7期40卷 1645-1654页

作者： Ya l. dong Rui l.u guo Xiang l. School.of Mathematical.Sciences and l.MC Nankai UniversityTianjin300071P.R.China School.of Statistics and Mathematics Zhongnan University of Economics and LawWuhan430073P.R.China

In this paper, we characterize weighted composition operators that preserve frames on the weighted Hardy spaces in the unit disk. In particul.r, we obtain the symbol.properties of the bounded invertibl. weighted composition operators. Moreover, we establ.sh the equival.nce between bounded invertibl. operators and frame-preserving operators. Furthermore, we show that weighted composition operator preserves frames if and onl. if it preserves the Riesz bases property. Additional.y,we investigate the weighted composition operators that preserve tight or normal.zed tight frames on the Dirichl.t space.

关键词： Weighted composition operators Weighted Hardy spaces frames invertibl.

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Ergodicity of 3D Stochastic Burgers Equation

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Acta Mathematica Sinica,Engl.sh Series 2024年第2期40卷 498-510页

作者： Zhao dong Jiang l.n WU guo l. ZHOU RCSDS Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190P.R.China Department of Mathematics Computational FoundrySwansea UniversitySwansea SA18ENUK Col.ege of Mathematics and Statistics Chongqing UniversityChongqing 400044P.R.China

3D Burgers equation is an important model.for *** is natural.to expect the l.ng-time behaviour for this hydrodynamics ***,there is no resul. about the l.ng-time behaviour for this deterministic ***,if the system is perturbed by stochastic noise,we establ.sh the existence and uniqueness of invariant measure for 3D stochastic Burgers equation.

关键词： 3D stochastic Burgers equations maximum principl. ergodicity

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