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Journal of Materials Science & Technology 2018年第12期34卷 2431-2438页

作者： Chengshuai Li Shaodong Hu Zhongming Ren yves Fautrelle Xi Li State Key Laboratory of Advanced Special Steels Shanghai University SIMAP-EPM-Madylam/G-INP/CNRS PHELMA

Effect of the simultaneous application of a high static magnetic field and a low alternating electric current on the solidification structure of pure aluminum has been investigated. Results show that the refinement of the solidification structure is enhanced by the electric current under a certain magnetic field. However,when the magnetic field intensity exceeds a certain value, the refinement is impaired under a certain electric current. The observation by electron backscattered diffraction(EBSD) shows the complex fields have led to the increase of the low angle boundaries with the refinement. Moreover, the application of the static gradient magnetic field is capable of modifying the distribution of the refined grains. The above results may be attributed to the formation of the cavities during the electromagnetic vibration process and the high magnetic field.

关键词： Complex fields High magnetic field Refinement Grain boundaries

Roundtable： Research Opportunities and Challenges for Emerging Software Systems

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Journal of Computer Science & Technology 2015年第5期30卷 935-941页

作者：张翔宇张冬梅 yves Le Traon 王青张路 Department of Computer Science Purdue University West Lafayette IN 47907 U.S.A. Microsoft Research Beijing 100080 China Faculty of Science Technology and Communication University of Luxembourg Luxembourg Institute of Software Chinese Academy of Sciences Beijing 100190 China School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

For this special section on software systems special section, discuss important issues that will shape several research leaders in software systems, as guest editors for this this field＇s future directions. The essays included in this roundtable article cover research opportunities and challenges for emerging software systems such as data processing programs （Xiangyu Zhang） and online services （Dongmei Zhang）, with new directions of technologies such as unifications in software testing （yves Le Traon）, data-driven and evidence-based software engineering （Qing Wang）, and dynamic analysis of multiple traces （Lu Zhang）. Tao Xie, Leading Editor of Special Section on Softwaare Svstem.

关键词： data processing program software analytics online service software testing data-driven software engineering evidence-based software engineering

Thermo-Mechanical Calculation of Printed Circuit Heat Exchanger Using Homogenization

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Journal of Thermal Science 2022年第6期31卷 2309-2328页

作者： GARNIER Christophe VINCENT Sébastien LAMAGNERE Pierre LEJEAIL yves CACHON Lionel CEA DESIRESNENuclear Technology DepartmentCadarache F-13108 Saint-Paul-Lez-DuranceFrance

The Finite-Element Method(FEM) is mainly used to design Compact Heat Exchanger structures. However, the narrow channel structures require fine mesh to accurately compute stress and strain. Combined with the dimensions of the overall component, this leads to an excessively large numerical model and therefore long computing time. This is especially true for transient thermal analyses, which require taking into account the full geometry. It is therefore interesting to reduce the size of the mesh. Periodic homogenization is an efficient method for achieving this goal. It can be applied to the core of the structure when periodic patterns(identified on basis of the arrangement of the channels) exist. A method based on this technique, with some improvements, is proposed in this paper for thermal loading without internal pressure. In addition to the Equivalent Homogenous Medium(EHM) replacing the periodic patterns, some explicit channels are interposed between the EHM and the cover plates. This has two advantages. The first is to smooth the transition of stiffness between the cover plates and the homogenized medium. The second one is to be able to directly compute stress and strain on the most critical channels located in this area. This paper assesses the method’s effectiveness for thermal loadings in order to conduct thermal stress analyses. First, the equivalent elastic constants of the EHM are obtained with a numerical Finite Elements Method. Then, two 2D cases using EHM are compared against a 2D explicit model(i.e. explicit geometry for the core channels). These cases are chosen to validate the EHM itself and its effectiveness for a real section of the heat exchanger. Results show very good agreement with a relative difference lower than 1%. In addition, the sensitivity to the number of layers added between the EHM and the cover plates is analysed. It is recommended interposing at least two layers of patterns to obtain converged results for the considered configuration

关键词： compact heat exchanger thermal stress finite element method homogenization

Xyloglucans of Monocotyledons Have Diverse Structures

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Molecular Plant 2009年第5期2卷 943-965页

作者： yves S.Y. Hsieh Philip J. Harris School of Biological Sciences The University of Auckland Private Bag 92019 Auckland New Zealand

Except in the Poaceae, little is known about the structures of the xyloglucans in the primary walls of monocotyledons. Xyloglucan structures in a range of monocotyledon species were examined. Wall preparations were isolated, extracted with 6 M sodium hydroxide, and the extracts treated with a xyloglucan-specific endo-（1→4）-β-glucanase preparation. The oligosaccharides released were analyzed by high-performance anion-exchange chromatography and by matrix-assisted laser-desorption ionization time-of-flight mass spectrometry. Oligosaccharide profiles of the non-commelinid monocotyledons were similar to those of most eudicotyledons, indicating the xyloglucans were fucogalactoxyloglucans, with a XXXG a core motif and the fucosylated units XXFG and XLFG. An exception was Lemna minor （Araceae）, which yielded no fucosylated oligosaccharides and had both XXXG and XXGn core motifs. Except for the Arecales （palms） and the Dasypogonaceae, which had fucogalactoxyloglucans, the xyloglucans of the commelinid monocotyledons were structurally different. The Zingiberales and Commelinales had xyloglucans with both XXGn and XXXG core motifs; small proportions of XXFG units, but no XLFG units, were present. In the Poales, the Poaceae had xyloglucans with a XXGn core motif and no fucosylated units. In the other Poales families, some had both XXXG and XXGn core motifs, others had only XXXG; XXFG units were present, but XLFG units were not.

关键词： Commelinid monocotyledons non-commelinid monocotyledons plant cell walls Poaceae xyloglucans xyloglucan-specific endo-(1→4)-β-glucanase.

Insect immune resistance to parasitoids

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Insect Science 2008年第1期15卷 67-87页

作者： yves Carton Marylène Poirié Anthony J. Nappi Laboratoire Evolution Génomes et Spéciation CNRS 91198 Gif/Yvette France and Université Paris-Sud 11 91405 Orsay CedexFrance Unité Mixte de Recherches 1112 'Réponse des Organismes aux Stress Environnementaux' Université Nice-Sophia AntipolisInstitut National de la Recherche Agronomique 400 route des Chappes 06903 Sophia-Antipofis France Department of Biology Loyola University of Chicago Chicago Illinois 60525 USA

Insect host-parasitoid interactions involve complex physiological, biochemical and genetic interactions. Against endoparasitoids, immune-competent hosts initiate a blood cell-mediated response that quickly destroys the intruders and envelops them in a multilayered melanotic capsule. During the past decade, considerable progress has been made in identifying some of the critical components of the host response, mainly because of the use of efficient molecular tools. This review examines some of the components of the innate immune response of Drosophila, an insect that has served as an exceptionally good experimental model for studying non-self recognition processes and immune cell signaling mechanisms. Topics considered in this review include hematopoiesis, proliferation and adhesion of hemocytes, melanogenesis and associated cytotoxic molecules, and the genetic aspects of the host-parasitoid interaction.

关键词： cytotoxic molecules hemocyte innate immunity melanogenesis parasitoid,resistance genes

Optimal Control of Hepatitis B in a sub-Saharan African rural area

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Applied Mathematics(A Journal of Chinese Universities) 2023年第4期38卷 523-544页

作者： Jean Pierre II KOUENKAM Joseph MBANG Gilbert CHENDJOU yves EMVUDU Department of Mathematics Faculty of ScienceUniversity of Yaounde IP.O.Box 812 YaoundeCameroon

In this paper,we ameliorate the model proposed in[13],by incorporating the influence of hepatitis B e antigen(HBeAg)status of mothers on vertical *** use the improved model to fit reported HBV new infections in the Zhejiang Province of *** to predict the course of the Hepatitis B(HBV)infection in this Chinese area,and in Tokombere,located in sub-Saharan Africa(SSA).Furthermore,we apply optimal control techniques in view to re-examine the effects of the newborn vaccination,the universal vaccination and the treatment of chronic carriers in preventing the HBV *** results show that treatment slightly steps in the optimal strategy,while immunisation is an effective *** the other hand,they indicate that the control measures and immunization programs implemented in Zhejiang Province are ***,they suggest that in SSA,a package of several policies centred on birth dose vaccination should be implemented.

关键词： hepatitis B virus chronic carriers vaccine treatment Pontryagin

Microstructure Effects of Ultrasonic Waves in a Fiber Reinforced Composite Plate

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Chinese Physics Letters 2000年第10期17卷 740-742页

作者： HAN Jun-Bo TANG Li-guo CHENG Jian-chun yves Berthelot The State Key Laboratory of Modern Acoustics Nanjing UniversityNanjing 210093 School of Mechanical Engineering Georgia Institute of TechnologyAtlanta GA30332-0405USA

The microstructure effect of ultrasonic waves in a unidirectional titanium graphite composite is analyzed by the mode energy conversions of the laser-generated ultrasonic Lamb *** carrying energy of each mode in the Lamb wvaves is calculated quantitatively by the time-frequency filtering technique of the Wigner *** found that the energy conversions among modes have happened in the process of propagation of ultrasonic Lamb *** energy conversions are attributed to microstructure scattering of ultrasonic wave by the fibers in a fiber reinforced composite *** work will provide a quantitative method of ultrasonic characterizationof microstructure feature of the composite materials by the laser-generated Lamb wave technique.

关键词： composite microstructure Microstructure

WNT/β-catenin pathway and circadian rhythms in obsessive-compulsive disorder

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Neural Regeneration Research 2022年第10期17卷 2126-2130页

作者： Alexandre Vallée yves Lecarpentier Jean-Noël Vallée Department of Clinical Research and Innovation(DRCI) Foch HospitalSuresnesFrance Centre de Recherche Clinique Grand Hôpital de l’Est Francilien(GHEF)MeauxFrance Laboratoire de Mathématiques et Applications(LMA) Universitéde PoitiersPoitiersFrance Centre Hospitalier Universitaire(CHU)Amiens Picardie UniversitéPicardie Jules Verne(UPJV)AmiensFrance

The neuropsychiatric disease named obsessive-compulsive disorder is composed by obsessions and/or ***-compulsive disorder etiologies are ***,numerous mechanisms in several localizations are *** studies showed that both glutamate,inflammatory factors and oxidative stress could have main functions in obsessive-compulsive *** synthase kinase-3β,the major negative controller of the WNT/β-catenin pathway is upregulated in obsessive-compulsive *** obsessive-compulsive disorder,some studies presented the actions of the different circadian clock ***/β-catenin pathway and circadian clock genes appear to be ***,this review focuses on the interaction between circadian clock genes and the WNT/β-catenin pathway in obsessive-compulsive disorder.

关键词： circadian rhythms glutamatergic pathway inflammation obsessive-compulsive disorder oxidative stress WNT/β-catenin pathway

Anisotropic Behavior Analyzed by Laser-Generated Lamb Waves for Fiber Composite Plates

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Chinese Physics Letters 1999年第7期16卷 518-519页

作者： CHENG Jian-chun HAN Jun-bo ZHANG Shu-yi yves Berthelot Laboratory of Modern Acoustics and Institute of Acoustics Nanjing UniversityNanjing 210093 School of Mechanical Engineering Georgia Institute of Technology^AtlantaGA 30332USA

Analyses of the anisotropic behavior of a Uber composite plate from the laser-generated ultrasonic Lamb waveforms propagating in different directions are presented by employing wavelet transform *** time-frequency representation plots of the waveforms clearly exhibit the anisotropic behavior of the composite *** plots also indicate that the waveform mainly consists of three or four lower-order Lamb wave modes,and other higher-order modes can be neglected in extracting elastic stiffness properties by comparison of theory with experimental *** group velocity of each mode is calculated according to the group delay and the source-receiver distance.

关键词： composite anisotropic neglected

Parametric instability of a liquid metal sessile drop under the action of low-frequency alternating magnetic fields

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Journal of Hydrodynamics 2013年第2期25卷 300-308页

作者：雷作胜郭加宏 FAUTRELLE yves ERNST Roland ETAY Jacqueline 任忠鸣 Shanghai Key Laboratory of Modern Metallurgy and Materials Processing Shanghai University SIMAP-EPM Laboratory Grenoble Institute of Technology/CNRS UMR 5266 France Shanghai Institute of Applied Mathematics and Mechanics Shanghai University SIMAP-EPM Laboratory Grenoble Institute of Technology/CNRS UMR 5266France

A 2-D mathematical model is developed in order to simulate a parametric electromagnetic instability oscillation process of a liquid metal droplet under the action of low frequency magnetic field. The Arbitrary Lagrangian-Eulerian （ALE） method and weak form constraint boundary condition are introduced in this model for implementation of the surface tension and electromagnetic force on liquid droplet free surface. The results of the numerical calculations indicate the appearance of various regimes of oscillation. It is found that according to the magnetic field frequency various types of oscillation modes may be found. The oscillation is originated from an instability phenomenon. The stability diagram of liquid metal droplet in the parameter space of magnetic frequency and magnetic flux density is determined numerically. The diagram is very similar to that found in the so-called parametric instability.

关键词： sessile drop parametric instability low-frequency alternating magnetic fields numerical simulation