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On nodal prime fano threefolds of degree 10

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Science China Mathematics 2011年第8期54卷 1591-1609页

作者： DEBARRE Olivier ILIEV Atanas MANIVEL laurent Dpartement de Mathmatiques et Applications UMR CNRS 8553cole Normale Suprieure45 rue d'Ulm75230 Paris cedex 05France Department of Mathmetics Seoul National UniversityGwanak CompusBldg.27Seoul 151-747Korea Institut fourier Universitè de Grenoble I et CNRSBP 7438402 Saint-Martin d'HèresFrance

We study the geometry and the period map of nodal complex prime fano threefolds with index 1 and degree *** show that these threefolds are birationally isomorphic to Verra threefolds,i.e.,hypersurfaces of bidegree (2,2) in P2 × *** Verra's results on the period map for these threefolds and on the Prym map for double tale covers of plane sextic curves,we prove that the fiber of the period map for our nodal threefolds is the union of two disjoint surfaces,for which we give several *** result is the analog in the nodal case of a result of Debarre O,Iliev A,Manivel L (arXiv:0812.3670) in the smooth case.

关键词： fano threefolds period map Torelli proldem Prym varieties intermediate Jacobian nets of quadrics

Large scale hybrid Monte Carlo simulations for structure and property prediction

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npj Computational Materials 2018年第1期4卷 1-7页

作者： Sergei Prokhorenko Kruz Kalke Yousra Nahas laurent Bellaiche Physics Department and Institute for Nanoscience and Engineering University of ArkansasFayettevilleAR 72701USA

The Monte Carlo method is one of the first and most widely used algorithms in modern computational *** condensed matter physics,the particularly popular flavor of this technique is the Metropolis Monte Carlo *** being incredibly robust and easy to implement,the Metropolis sampling is not well-suited for situations where energy and force evaluations are computationally *** search for a more efficient technique,we here explore the performance of Hybrid Monte Carlo sampling,an algorithm widely used in quantum electrodynamics,as a structure prediction scheme for systems with long-range *** results show that the Hybrid Monte Carlo algorithm stands out as an excellent computational scheme that can not only significantly outperform the Metropolis sampling but also complement molecular dynamics in materials science applications,while allowing ultra-large-scale simulations of systems containing millions of particles.

关键词： prediction property scheme

Lifting the veil on the keratinocyte contribution to cutaneous nociception

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Protein & Cell 2020年第4期11卷 239-250页

作者： Matthieu Talagas Nicolas Lebonvallet francois Berthod laurent Misery Univ Brest LIEN29200 BrestFrance Laboratoire d'Organogenese Experimentale(LOEX) University of LavalQuebecCanada Department of Dermatology Brest University HospitalBrestFrance Univ Brest BSAM(Institut Brestois de Sante Agro matiere)29200 BrestFrance

Cutaneous nociception is essential to prevent individuals from sustaining *** to the conventional point of view,the responses to noxious stimuli are thought to be exclusively initiated by sensory neurons,whose activity would be at most modulated by *** recent studies have demonstrated that epidermal keratinocytes can also act as primary nociceptive transducers as a supplement to sensory *** enlighten our understanding of cutaneous nociception,this review highlights recent and relevant findings on the cellular and molecular elements that underlie the contribution of epidermal keratinocytes as nociceptive modulators and noxious sensors,both under healthy and pathological conditions.

关键词： keratinocyte nociception skin TRP pain inflammation

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为温压工艺设计的混合粉

粉末冶金技术 1998年第1期16卷 40-51页

作者： S.St-laurent f.Chagnon 言小雄加拿大魁北克金属粉末有限公司南海永联工业资源有限公司

在工业生产用压机的压制条件下，对为温压设计的经粘结剂处理的材料的性能进行了研究，定量地探讨了粉末温度对压制压力的一致性、稳定性和对零件的生坯与烧结件性能的影响。评价了混合粉对温度波动和生产中断的承受能力。

关键词：温压粘结剂处理性能稳定性混合粉

Morphological studies of rose prickles provide new in sights

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Horticulture Research 2021年第1期8卷 2849-2860页

作者： Ningning Zhou fabienne Simonneau Tatiana Thouroude Laurence Hibrand-saint Oyant fabrice foucher Univ Angers Institut AgroINRAEIRHSSFR QUASAVF-49000 AngersFrance National Engineering Research Center for Ornamental Horticulture Flower Research Institute(FRI)Yunnan Academy of Agricultural SciencesKunming 650231China Univ Angers INRAESFR QUASAVF-49000 AngersFrance

Prickles are common structures in plants that play a key role in defense against *** the Rosa genus,prickles are widely present with great diversity in terms of form and *** cut rose production,prickles represent an important issue,as they can damage the flower and injure *** objectives were to precisely describe the types of prickles that exist in roses,their tissues of origin and their *** performed a detailed histological analysis of prickle initiation and development in a rose f1 *** on the prickle investigation of 110 roses,we proposed the fi rst categorization of prickles in the Rosa *** are mainly divided into two categories,nonglandular prickles(NGPs)and glandular prickles(GPs),and subcategories were defined based on the presence/absence of hairs and *** demonstrated that NGPs and GPs both originate from multiple cells ofthe ground meristem beneath the *** GPs,the gland cells originate from the protoderm of the GP at the early developmental *** findings clearly demonstrate that prickles are notmodified trichomes(which originate from the protoderm).These conclusions are different from the current mainstream *** results provide a foundation for further studies on prickle initiation and development in plants.

关键词： beneath origin Morphological

Interplay between Kitaev interaction and single ion anisotropy in ferromagnetic CrI_(3) and CrGeTe_(3) monolayers

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npj Computational Materials 2018年第1期4卷 185-190页

作者： Changsong Xu Junsheng feng Hongjun Xiang laurent Bellaiche Physics Department and Institute for Nanoscience and Engineering University of ArkansasFayettevilleAR 72701USA Key Laboratory of Computational Physical Sciences(Ministry of Education) State Key Laboratory of Surface Physicsand Department of PhysicsFudan University200433 ShanghaiChina School of Physics and Materials Engineering Hefei Normal University230601 HefeiChina Collaborative Innovation Center of Advanced Microstructures 210093 NanjingChina

Magnetic anisotropy is crucially important for the stabilization of two-dimensional(2D)magnetism,which is rare in nature but highly desirable in spintronics and for advancing fundamental *** works on CrI3 and CrGeTe_(3) monolayers not only led to observations of the long-time-sought 2D ferromagnetism,but also revealed distinct magnetic anisotropy in the two systems,namely Ising behavior for CrI3 versus Heisenberg behavior for CrGeTe_(3).Such magnetic difference strongly contrasts with structural and electronic similarities of these two materials,and understanding it at a microscopic scale should be of large ***,firstprinciples calculations are performed and analyzed to develop a simple Hamiltonian,to investigate magnetic anisotropy of CrI3 and CrGeTe_(3) *** anisotropic exchange coupling in both systems is surprisingly determined to be of ***,the interplay between this Kitaev interaction and single ion anisotropy(SIA)is found to naturally explain the different magnetic behaviors of CrI3 and CrGeTe_(3).finally,both the Kitaev interaction and SIA are further found to be induced by spin–orbit coupling of the heavy ligands(I of CrI3 or Te of CrGeTe_(3))rather than the commonly believed 3d magnetic Cr ions.

关键词： anisotropy interaction coupling

WHY PROHIBIT DONATIONS BETWEEN HUSBAND AND WIfE IN MEDIEVAL EUROPE？

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frontiers of Law in China-Selected Publications from Chinese Universities 2012年第4期7卷 644-655页

作者： Nicolas laurent-Bonne School of Law University Pantheon-Assas Paris II12 place Panth6on 75005 ParisFrance

Between the end of the eleventh century and the beginning of the twelfth century, following the rediscovery of Roman law in the West, the first Bolognese commentators stuck to the Roman principle prohibiting donations between spouses. Authors commented over and over again upon fragments of the writings of Roman jurists Paul and Ulpian that were integrated into the Digest of Emperor Justinian. According to these jurists of the Classical Age, fears of despoliation between spouses, of negligence in the children ＂s education and of marriage becoming venal were the main reasons found. Medieval canon law takes the subject of donations between spouses very seriously. laurent of Spain （＇k 1248）, in the Glossa Palatina, worries about donations of cosmetics, which are seen as luxury enhancing. In Liber Extra （1234）, a decretal signed by Gregory IX took up the subject, confirming the opinions expressed by Paul and Ulpian by expressing hostility to such donations on the basis of public morality. following the fourth Lateran Council （1215）, a new literary form appeared.＂ confession ~ or casuistic ~ manuals. In these aspects, the subject of gifts between spouses is closely assimilated to the question of sin, especially of luxury. Continental Europe＇s common law （ius commune） shows similar spirit in that respect. Italian statutory laws, in conformity with the separatist spirit of Roman law, forbade them without distinction. They were outlawed in English law by unitas carnis which presides over conjugal relations. According to Jean Boutiltier （1395）, the author of La Somme rural, a famous french interpreter of law, donations between spouses are generally regarded as a result of fear, complacency or luxury, and so shouM be forbidden. The common theme between Roman or Canon law and different common laws is the upholding of a certain public morality and the control of couples as the mainstay of their respective families.

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Synthesis of Branched Poly(butylene succinate):Structure Properties Relationship

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Chinese Journal of Polymer Science 2016年第7期34卷 873-888页

作者： Marie Vandesteene Nicolas Jacquel Rene saint-Loup Nadège Boucard Christian Carrot Alain Rousseau francoise fenouillot Unive Lyon INSA-LyonIngenierie des Materiaux PolymeresIMPUMR5223F-69621VilleurbanneFrance Univ Lyon Universite Jean MonnetIngenierie des Materiaux PolymeresIMPUMR5223F-42023 Saint-EtienneFrance Roquette freres.Polymer Chemistry Department F-62136 LestremFrance MBD Texinov F-38110 Saint-Didier-de-la-TourFrance

A series of branched poly（butylene succinate）（PBS） were synthesized with several branching agents namely trimethylol propane（TMP）, malic acid, trimesic acid, citric acid and glycerol propoxylate. The structure of the branched polymers was analyzed by SEC and ~1H-NMR. The effect of branching agent structure on crystallization was also investigated and played a significant role. Isothermal studies showed that glycerol propoxylate could act as a nucleating agent. By contrast high content of TMP disturbed the regularity of the chain and hindered the crystallization of PBS. from the non-isothermal kinetic study, it was found that glycerol propoxylate increased noticeably the crystallization rate due to the flexible structure of the branching agent. A secondary nucleation was observed with glycerol propoxylate attributed to the crystallization of amorphous fraction included between crystallites formed at the primary crystallization. Chain topology was obtained through rheological investigations and the synthesized polymers showed a typical behavior of a mixture of linear and randomly branched PBS. The incorporation of branches improved the processability of PBS for film blowing application and the modulus and the stress at break of the resulting film were significantly increased.

关键词： Poly(butylene succinate) Branching Crystallization Properties

Kinematic optimization of 2D plunging airfoil motion using the response surface methodology

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第2期13卷 105-120页

作者： Mahmoud MEKADEM Taha CHETTIBI Samir HANCHI laurent KEIRSBULCK Larbi LABRAGA fluids Mechanics Laboratory Polytechnic Military SchoolBordj el BahriAlgiers 16045Algeria TEMPO Laboratory University of Valenciennes and Hainaut-Cambresis59313 Valenciennes Cedex 9France Structural Mechnics Laboratory Polytechnic Military SchoolBordj el BahriAlgiers 16045Algeria TEMPO Laboratory University of Valenciennes and Hainaut-Cambresis59313 Valenciennes Cedex 9France

The propulsive efficiency of a plunging NACA0012 airfoil is maximized by means of a simple numerical optimization method based on the response surface methodology （RSM）. The control parameters are the amplitude and the reduced frequency of the harmonic sinusoidal motion. The 2D unsteady laminar flow around the plunging airfoil is computed by solving the Navier-Stokes equations for three Reynolds number values （Re = 3.3× 10^3, 1.1×10^4, and 2.2 × 10^4）. The Nelder-Mead algorithm is used to find the best control parameters leading to the optimal propulsive efficiency over the constructed response surfaces. It is found that, for a given efficiency level and regardless of the considered Re value, it is possible either to obtain high thrust by selecting a high oscillation frequency or to reduce the input power by adopting a low plunging amplitude. Key words： Plunging airfoil, Propulsive efficiency, Optimization, Response surface methodology （RSM）

关键词： Plunging airfoil Propulsive efficiency Optimization Response surface methodology (RSM)