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耦合湿地模块的流域水文模型模拟效率评价

水科学进展 2019年第3期30卷 326-336页

作者：吴燕锋章光新齐鹏 rousseau alain N 胡宝军宋峥于成刚中国科学院东北地理与农业生态研究所吉林长春130102 中国科学院大学北京100049 Institut National de la Recherche Scientifique-Eau Terre Environnement G1K 9A9 QuebecCanada 嫩江尼尔基水利水电有限责任公司黑龙江齐齐哈尔161005 黑龙江省大兴安岭水文局黑龙江加格达奇165000

耦合湿地模块的流域水文模型是开展流域湿地变化的水文效应及其水文功能评估的有效工具,其模拟效率直接关系到模拟精度和应用价值。选取中国湿地主要分布区之一的嫩江流域,利用PHYSITEL/HYDROTEL模型平台,构建孤立湿地和河滨湿地模块并... 详细信息

耦合湿地模块的流域水文模型是开展流域湿地变化的水文效应及其水文功能评估的有效工具,其模拟效率直接关系到模拟精度和应用价值。选取中国湿地主要分布区之一的嫩江流域,利用PHYSITEL/HYDROTEL模型平台,构建孤立湿地和河滨湿地模块并与流域水文模型耦合,并从拟合优度指数和模拟效率角度评价了耦合湿地模块的流域水文模型模拟效率。结果表明,耦合湿地模块的流域水文模型,拟合和验证期间模型的拟合度指数均有所提高,嫩江富拉尔基和大赉水文站控制流域的Nash-Sutcliffe系数和克林效率系数平均提高了3.08%和4.64%,均方根误差和相对偏差平均降低了12.72%和55.93%,且整个研究时段模拟结果的流量指数总体更接近于观测的径流数据。可见,耦合湿地模块的流域水文模型可提高水文过程模拟精度,更好地定量评估湿地水文功能,为流域水资源精准调控与湿地修复保护提供重要支撑。

关键词： PHYSITEL/HYDROTEL模型平台湿地模块流域水文模型模拟效率嫩江流域

Stepping up after spinal cord injury:negotiating an obstacle during walking

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Neural Regeneration Research 2025年第7期20卷 1919-1929页

作者： alain Frigon Charly G.Lecomte Department of Pharmacology-Physiology Faculty of Medicine and Health SciencesUniversitéde SherbrookeCentre de recherche du Centre Hospitalier Universitaire de SherbrookeSherbrookeQCCanada

Every day walking consists of frequent voluntary modifications in the gait pattern to negotiate *** spinal cord injury,stepping over an obstacle becomes *** over an obstacle requires sensorimotor transformations in several structures of the brain,including the parietal cortex,premotor cortex,and motor *** information and planning are transformed into motor commands,which are sent from the motor cortex to spinal neuronal circuits to alter limb trajectory,coordinate the limbs,and maintain *** spinal cord injury,bidirectional communication between the brain and spinal cord is disrupted and animals,including humans,fail to voluntarily modify limb trajectory to step over an ***,in this review,we discuss the neuromechanical control of stepping over an obstacle,why it fails after spinal cord injury,and how it recovers to a certain extent.

关键词： biomechanics locomotion neurophysiology obstacle negotiation spinal cord injury

Large electromechanical strain at high temperatures of novel <001> textured BiFeGaO3-BaTiO3 based ceramics

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Journal of Materials Science & Technology 2020年第13期47卷 92-99页

作者： Jiangguli Peng Wenbin Liu Jiangtao Zeng Liaoying Zheng Guorong Li Anthony rousseau alain Gibaud Abdelhadi Kassiba Key Laboratory of Inorganic Functional Material and Device Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Institut des Molécules et Matériaux du Mans(IMMM) CNRS UMR 6283Facultédes SciencesUniversitédu MaineAvenue O.Messiaen72085 Le MansCedex 09France Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

BiFeGaO3-BaTiO3(BFG-BT)based ceramics with a large piezoelectric coefficient are potential high performance lead-free piezoelectric *** this work,textured and random BFG-BT ceramics were realized by the solid state reaction method with and without BaTiO3(BT)*** ceramics were obtained by a reactive templated grain growth(RTGG)method leading to a high-temperature electromechanical strain of S=0.27%at 40 kV/cm and to an effective piezoelectric coefficient(d33*)up to 685 pm/V at 180℃.The easy movement of oriented domains enhanced the electromechanical strain under an applied electric field in textured sample(Lotgering factor f=66.3%).Structural investigations reveal that the proportion and degree of distortion of BFG-BT rhombohedral phase(R3c)reached its maximum in textured ceramics,resulting in large ferrodistortive displacements under electric *** addition,the dense nanodomains with low domain wall energies,inferred from the high-resolution transmission electron microscope(HR-TEM)observations,contribute to the extra displacement of the textured sample under an applied electric *** textured ceramics,the remnant polarization was stable(about 17μC/cm2)from room temperature to 180℃,contributing to the stable ferroelectric property at high *** the introduction of BT templates,high-density nanodomains were formed and the Burns temperature was enhanced in textured *** electromechanical strain,polarization and dielectric behavior were correlated to the textured or random forms of the BFG-BT based ceramics.

关键词： Textured ceramics Strain hysteresis Reactive templated grain growth Dielectric responses

Some Remarks on Korn Inequalities

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Chinese Annals of Mathematics,Series B 2018年第2期39卷 335-344页

作者： alain damlamian Dedicated to Philippe G. Ciarlet on the occasion of his 80th birthda

A recent joint paper with Doina Cioranescu and Julia Orlik was concerned with the homogenization of a linearized elasticity problem with inclusions and cracks(see[Cioranescu, D., Damlamian, A. and Orlik, J., Homogenization via unfolding in periodic elasticity with contact on closed and open cracks, Asymptotic Analysis, 82, 2013, 201–232]). It required uniform estimates with respect to the homogenization parameter. A Korn inequality was used which involves unilateral terms on the boundaries where a nopenetration condition is imposed. In this paper, the author presents a general method to obtain many diverse Korn inequalities including the unilateral inequalities used in [Cioranescu, D., Damlamian, A. and Orlik, J., Homogenization via unfolding in periodic elasticity with contact on closed and open cracks, Asymptotic Analysis, 82, 2013, 201–232]. A preliminary version was presented in [Damlamian, A., Some unilateral Korn inequalities with application to a contact problem with inclusions, C. R. Acad. Sci. Paris, Ser. I,350, 2012, 861–865].

关键词： Korn domains Korn-Wirtinger domains Unilateral Korn inequality

Pfaffians and Representations of the Symmetric Group

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Acta Mathematica Sinica,English Series 2009年第12期25卷 1929-1950页

作者： alain LASCOUX CNRS IGM Universite Paris-Est

Pfaffians of matrices with entries z[i, j]/（xi ＋ xj）, or determinants of matrices with entries z[i, j]/（xi - xj）, where the antisymmetrical indeterminates z[i, j] satisfy the Pliicker relations, can be identified with a trace in an irreducible representation of a product of two symmetric groups. Using Young＇s orthogonal bases, one can write explicit expressions of such Pfaffians and determinants, and recover in particular the evaluation of Pfaffians which appeared in the recent literature.

关键词： Pfaffians symmetric group representations

A non-ideal solution theory for the mechanics and electrochemistry of charged membranes

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npj Computational Materials 2022年第1期8卷 1365-1378页

作者： alain Boldini Maurizio Porfiri Center for Urban Science and Progress Department of Mechanical and Aerospace EngineeringNew York University Tandon School of Engineering370 Jay StreetBrooklyn11201NYUSA Center for Urban Science and Progress Department of Mechanical and Aerospace EngineeringDepartment of Biomedical EngineeringNew York University Tandon School of Engineering370 Jay StreetBrooklyn11201NYUSA

Understanding how ions and solvent molecules migrate within charged membranes is fundamental for advancing the analysis of biological membranes and the design of energy storage and production *** efforts highlighted a significant interplay between mechanics and electrochemistry in charged membranes,calling for the development of high-fidelity models to describe their ***,we propose a continuum theory of the chemoelectromechanics of charged membranes,accounting for potentially large deformations and non-idealities of the solution permeating the *** demonstrate the potential applications of our theory within the study of ionic polymer *** theory predicts sizeable effects of non-idealities and mechanical deformations,enabling insight into the role of mechanics on solute and solvent transport within charged membranes.

关键词： interaction. theory electrochemistry

The Guianese population of the fire ant Solenopsis saevissima is unicolonial

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Insect Science 2016年第5期23卷 739-745页

作者： alain Lenoir Severine Devers Axel Touchard alain Dejean lRBI Institut de Recherche sur la Biologie de I'lnsecte UMR CNRS 7261 Universite Francois Rabelais 37200 Tours CNRS Ecologie des Forets de Guyane (UMR CNRS 8172) Campus agronomique BP 316 97379 Kourou cedex Universite de Toulouse UPS INP Ecolab 118 route de Narbonne 31062 Toulouse and CNRS Ecolab (UMR-CNRS 5245) 31062 Toulouse France

In this study, conducted in French Guiana, a part of the native range of the fire ant Solenopsis saevissima, we compared the cuticular hydrocarbon profiles of media workers with previous results based on intraspecific aggressiveness tests. We noted a strong congruence between the two studies permitting us to delimit 2 supercolonies extending over large distances （up to 54 kin）, a phenomenon known as unicoloniality. Solenopsis geminata workers, taken as an out-group for cluster analyses, have a very different cuticular hydrocarbon profile. Because S. saevissima has been reported outside its native range, our conclusion is that this species has the potential to become invasive because unicoloniality （i.e., the main attribute for ants to become invasive） was shown at least for the Guianese population.

关键词： biological invasions cuticular hydrocarbons fire ants unicoloniality

Impact of Drops on Non-wetting Biomimetic Surfaces

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Journal of Bionic Engineering 2009年第4期6卷 330-334页

作者： alain Merlen Philippe Brunet Institut d'Electronique de Microelectronique et Nanotechnologie IEMN Universite des sciences et technologies de Lille1UMR CNRS 8520Avenue Poincare BP 6006959652 Villeneuve d'Ascq cedexFrance

We have carried out an experimental study of liquid drop impact on superhydrophobic substrates covered by a carpet of chemically coated *** micro-structure of the surface is similar to some biological ones(Lotus leaf for example).In this situation the contact angle can then be considered as equal to 180 degrees,with no *** to its initial inertia,the drop experiences a flattening phase after it hits the surface,taking the shape of a *** it reaches its maximal lateral extension,the drop begins to retract and bounces *** have extracted the lateral extension of the drop,and we propose a model that explains the *** find a limit initial velocity beyond which the drop protrudes into the nano-wire *** discuss the relevance of practical issues in terms of self-cleaning surfaces or spray-cooling.

关键词： superhydrophobic surfaces drop impact

Ribavirin:Past,present and future

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World Journal of Hepatology 2016年第2期8卷 123-130页

作者： Véronique Loustaud-Ratti Marilyne Debette-Gratien Jérémie Jacques Sophie alain Pierre Marquet DenisSautereau Annick rousseau Paul Carrier Fédération Hépatologie CHU Dupuytren87042 LimogesFrance Service d’Hépatogastroentérologie CHU Limoges87042 LimogesFrance U850 INSERM Universitéde LimogesCHU Limoges87042 LimogesFrance Service de Bactériologie Virologie CHU Limoges87042 LimogesFrance U1092 INSERM Universitéde LimogesCHU Limoges87042 LimogesFrance Service de Pharmacologie CHU Limoges87042 LimogesFrance

Before the advent of direct acting antiviral agents(DAAs) ribavirin, associated to pegylated-interferon played a crucial role in the treatment of chronic hepatitis C, preventing relapses and breakthroughs. In the present era of new potent DAAs, a place is still devoted to the drug. Ribavirin associated with sofosbuvir alone is efficient in the treatment of most cases of G2 infected patients. All options currently available for the last difficult-to-treat cirrhotic G3 patients contain ribavirin. Reducing treatment duration to 12 wk in G1 or G4 cirrhotic compensated patients is feasible thanks to ribavirin. Retreating patients with acquired anti NS5 A resistance-associated variants using ribavirin-based strategies could be useful. The addition of ribavirin with DAAs combinations however, leads to more frequent but mild adverse events especially in cirrhotic patients. Preliminary data with interferon-free second generation DAAs combinations without ribavirin suggest that future of the drug is jeopardized even in difficult-totreat patients: The optimization of ribavirin dosage according to an early monitoring of blood levels has been suggested to be relevant in double therapy with peginterferon or sofosbuvir but not with very potent combinations of more than two DAAs.

关键词： Ribavirin Hepatitis C Peginterferon Directacting antiviral agents