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波浪对垂直圆柱的冲击作用研究进展

哈尔滨工程大学学报（英文版） 2023年第1期22卷 1-13页

作者：马玉祥台兵谢波涛许条健 marc perlin 董国海 State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116023China CNOOC Research Institute Co.Ltd. Beijing 100028China Department of Ocean Engineering Texas A&M UniversityGalveston and College StationTX77554USA

Wave slamming is an important phenomenon due to its destructive power,and with the rapid development of offshore wind turbines,wave slamming on vertical cylinders has garnered lots of ***,the phenomenon of wave slamming on vertical cylinders is very complicated due to both the intrinsic complexity of breaking waves and that of slamming *** objective of this paper is to provide a general review of research related to this problem,including theoretical methods,experimental studies,numerical simulations,and full-scale *** on these approaches,the momentum theory/pressure impulse theory,spatial distribution characteristics of impacts to various breaking waves,wave generation methods,analysis methods for measured forces under structure response,scale effects in experiments,and in-situ measurements have been introduced and *** show that simplifications in existing models for wave impacting such as wave characteristics and structural response reduce its applicability and should be studied further both in theoretical,experimental and numerical researches.

关键词： Breaking waves Slamming forces Wave-structure interaction Vertical slender cylinders Offshore wind power

Computational modelling of gas–liquid–solid multiphase free surface flow with and without evaporation

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Particuology 2024年第7期90卷 218-235页

作者： Huihuang Xia marc Kamlah Institute for Applied Materials(IAM) Karlsruhe Institute of Technology(KIT)Hermann-von Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany

Gas–liquid–solid multiphase systems are ubiquitous in engineering applications,*** printing,spray drying and *** a numerical framework for modelling these multiphase systems is of great *** improved,resolved computational fluid dynamics-discrete element method(CFD-DEM)framework is developed to model the multiphase free surface flow with and without *** improved capillary force model is developed to compute the capillary interactions for partially floating particles at a free *** well-known benchmark cases,namely drag coefficient calculation,the single sphere settling,and drafting-kissing-tumbling of two particles are conducted to validate the resolved CFD-DEM *** turns out that the resolved CFD-DEM model developed in this paper can accurately calculate the fluid–solid interactions and predict the trajectory of solid particles interacting with the liquid *** demonstrations,namely two particles moving along a free surface when the liquid phase evaporates,and particle transport and accumulations inside an evaporating sessile droplet show the performance of the resolved model.

关键词： Capillary force Discrete element method Liquid bridge Particle transport Resolved CFD-DEM Volume of fluid

Bound and Resonating Multiquark Configurations

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Chinese Physics Letters 2024年第8期41卷 8-12页

作者： Jean-marc Richard Institut de Physique des 2 Infinis de Lyon Université Claude Bernard(Lyon 1) CNRS-IN2P34 rue Enrico Fermi69622 VilleurbanneFrance

We review the predictions of quark models for multiquark configurations that are bound or resonant states,and compare different methods for estimating the properties of resonances.

关键词： quark Configuration resonant

Sperm function, mitochondrial activity and in vivo fertility are associated to their mitochondrial DNA content in pigs

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Journal of Animal Science and Biotechnology 2024年第4期15卷 1550-1558页

作者： marc Llavanera Yentel Mateo‑Otero Estel Vinolas‑Vergés Sergi Bonet marc Yeste Unit of Cell Biology Department of BiologyFaculty of SciencesUniversity of GironaGirona ES‑17003Spain Biotechnology of Animal and Human Reproduction(TechnoSperm) Institute of Food and Agricultural TechnologyUniversity of GironaGirona ES‑17003Spain Catalan Institution for Research and Advanced Studies(ICREA) Barcelona ES‑08010Spain

Background Despite their low abundance in sperm, mitochondria have diverse functions in this cell type, includ-ing energy production, signalling and calcium regulation. In humans, sperm mitochondrial DNA content(mtDNAc) has been reported to be negatively linked to sperm function and fertility. Yet, the association between mtDNAc and sperm function in livestock remains unexplored. For this reason, this study aimed to shed some light on the link between mtDNAc and sperm function and fertilising potential in pigs. A qPCR method for mtDNAc quantification was optimised for pig sperm, and the association of this parameter with sperm motility, kinematics, mitochondrial activity, and fertility was subsequently *** First, the q PCR method was found to be sensitive and efficient for mtDNAc quantification in pig sperm. By using this technique, mtDNAc was observed to be associated to sperm motility, mitochondrial activity and in vivo, but not in vitro, fertility outcomes. Specifically, sperm with low mtDNAc were seen to exhibit greater motility but decreased mitochondrial activity and intracellular reactive oxygen species. Interestingly, samples with lower mtD-NAc showed higher conception and farrowing rates, but similar in vitro fertilisation rates and embryo development, when compared to those with greater *** These findings enrich our comprehension of the association of mtDNAc with sperm biology, and lay the foundation for future research into employing this parameter as a molecular predictor for sperm function and fer-tility in livestock.

关键词： Fertility Mitochondria Motility mtDNA copy number qPCR Sperm

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双向波列相互作用的实验研究

双向波列相互作用的实验研究

Piezoelectric resonant ice protection systems–Part1/2:Prediction of power requirement for de-icing a NACA 0024 leading edge

第十六届中国海洋（岸）工程学术讨论会

作者：刘殿勇马玉祥 marc perlin 董国海大连理工大学海岸和近海工程国家重点实验室密歇根大学安娜堡分校船舶与海洋工程系

实验研究了有限水深条件下双向小夹角传播的规则波列之间的相互作用,分析了不同波浪频率以及初始波陡对波浪相互作用的影响。结果显示频率对波列之间的相互作用起主导因素:对于低频率波浪(f1.2Hz),波列相互作用过程中波面呈现出明显的... 详细信息

实验研究了有限水深条件下双向小夹角传播的规则波列之间的相互作用,分析了不同波浪频率以及初始波陡对波浪相互作用的影响。结果显示频率对波列之间的相互作用起主导因素:对于低频率波浪(f1.2Hz),波列相互作用过程中波面呈现出明显的三维特征且波列分开后波面依然没有恢复到二维特征。另外在波列相遇过程中,波浪相互叠加会导致波高增大,实验发现波浪的最大波高与初始波高呈线性关系但与频率无关。

关键词：波浪相互作用规则波物理模型实验破碎

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Chinese Journal of Aeronautics 2024年第3期37卷 92-103页

作者： Valerian PALANQUE Jason POTHIN Vale′rie POMMIER-BUDINGER marc BUDINGER Institut Clement Ader University of ToulouseINSAISAE-SUPAEROMINES ALBIUPSCNRSToulouse 31055France ISAE-SUPAERO University of Toulouse10 Avenue Edouard BelinToulouse 31055France

This paper proposes a numerical method to analyze the ice protection capability and predict the power requirements of a piezoelectric resonant de-icing *** method is based on a coupled electro-mechanical finite element analysis which enables the fast computation of the modes of resonance of interest to de-ice curved surfaces and the estimation of the input voltage and current required for a given configuration(defined by its mode,actuator location,ice deposit,etc.).Eventually,the electric power to be supplied can be also *** method is applied to a NACA 0024 leading edge equipped with piezoelectric ***,two extension modes are analyzed and compared with respect to their efficiency and power ***,tests are carried out in an icing tunnel to verify the effectiveness of the piezoelectric ice protection system and the predictions of the maximal required *** system allows de-icing the leading edge in less than 2 s for a glaze ice deposit.

关键词： Ice protection system Piezoelectric Resonance mode Ice fracture Leading edge de-icing

Populism as a Crisis of Democratic Legitimacy:With Some References to France and the United States

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Fudan Journal of the Humanities and Social Sciences 2024年第2期17卷 193-209页

作者： Jean-marc Coicaud Law and Global Affairs Rutgers UniversityRutgersUSA Fudan Institute for Advanced Study in Social Sciences ShanghaiChina

Populism combines the following characteristics:a rejection of economic policies linked to globalization;a condemnation of political and economic elites perceived as allied,directly or indirectly,to globalization policies;a nationalist conception of the national interest;a mistrust of immigration,seen as a threat to identity;as for populism’s supporters,a rather popular sociological profile,and an electoral profile that tends toward the“hard right”(“droite dure”),without ruling out bridges to the“hard left”(“gauche dure”).Having said this,I propose to defend three theses:populism is not the solution to the problems of the countries where it is developing,whether in France,the United States or elsewhere;it would be dangerous,however,to ignore the crises of which populism is the product;it is essential to take the measure of the problems that favor its emergence and to try to provide answers to them.

关键词： Populism Democratic legitimacy Hard right Hard left

Bioinspired supramolecular macrocycle hybrid membranes with enhanced proton conductivity

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Nano Research 2024年第2期17卷 797-805页

作者： Pengfei Yang Linlin Xu Panagiotis Trogadas marc-Olivier Coppens Yang Lan Centre for Nature Inspired Engineering Department of Chemical EngineeringUniversity College LondonLondon WC1E 7JEUK

Enhancing the proton conductivity of proton exchange membranes(PEMs)is essential to expand the applications of proton exchange membrane fuel cells(PEMFCs).Inspired by the proton conduction mechanism of bacteriorhodopsin,cucurbit[n]urils(CB[n],where n is the number of glycoluril units,n=6,7,or 8)are introduced into sulfonated poly(ether ether ketone)(SPEEK)matrix to fabricate hybrid PEMs,employing a nature-inspired chemical engineering(NICE)*** carbonyl groups of CB[n]act as proton-conducting sites,while the host–guest interaction between CB[n]and water molecules offers extra protonconducting ***,the molecular size of CB[n]aids in their dispersion within the SPEEK matrix,effectively bridging the unconnected proton-conducting sulfonic group domains within the SPEEK ***,all hybrid membranes exhibit significantly enhanced proton ***,the SPEEK membrane incorporating 1 wt.%CB[8](CB[8]/SPEEK-1%)demonstrates the highest proton conductivity of 198.0 mS·cm^(−1) at 60°C and 100%relative humidity(RH),which is 228%greater than that of the pure SPEEK membrane under the same ***,hybrid membranes exhibit superior fuel cell *** CB[8]/SPEEK-1%membrane achieves a maximum power density of 214 mW·cm^(−2),representing a 140%improvement over the pure SPEEK membrane(89 mW·cm^(−2))at 50°C and 100%*** findings serve as a foundation for constructing continuous proton-conducting pathways within membranes by utilizing supramolecular macrocycles as fuel cell electrolytes and in other applications.

关键词： supramolecular macrocycle proton conductivity cucurbit[n]uril proton exchange membrane fuel cell

Predicting missing Energy Performance Certificates:Spatial interpolation of mixture distributions

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Energy and AI 2024年第2期16卷 200-212页

作者： marc Grossouvre Didier Rullière Jonathan Villot Mines Saint-Etienne CNRSUMR 6158 LIMOSInstitut Henri FayolDepartement GMIEspace Fauriel29 rue PonchardierSaint-Etienne42023France U.R.B.S.SAS Bâtiment des Hautes Technologie20 Rue Professeur Benoit LAURASSaint-Etienne42000France Mines Saint-Etienne Univ Clermont AuvergneCNRSUMR 6158 LIMOSInstitut Henri FayolEspace Fauriel29 rue PonchardierSaint-Etienne42023France Mines Saint-Etienne Univ LyonCNRSUniv Jean MonnetUniv Lumiere Lyon 2Univ Lyon 3 Jean MoulinENS LyonENTPEENSA LyonUMR 5600 EVSInstitut Henri FayolSaint-Etienne42023France

Mass renovation goals aimed at energy savings on a national scale require a significant level of public financial *** identify target buildings,decision-makers need a thorough understanding of energy *** Performance Certificates(EPC)provide information about areas of space,such as land plots or a building’s footprint,without specifying exact *** cover only a fraction of *** paper demonstrates that learning from observed EPCs to predict missing ones at the building level can be viewed as a spatial interpolation problem with uncertainty both on input and output *** Kriging methodology is applied to random fields observed at random locations to determine the Best Linear Unbiased Predictor(BLUP).Although the Gaussian setting is lost,conditional moments can still be *** are admissible,even with missing *** present applications using both simulated and real data,with a specific case study of a city in France serving as an example.

关键词： Climate governance Energy efficiency Multi-scale processes Areal data Change of support