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Managing power grids through topology actions: A comparative study between advanced rule-based and reinforcement learning agents

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Energy and AI 2023年第4期14卷 283-293页

作者： Malte Lehna Jan Viebahn antoine Marot Sven Tomforde Christoph Scholz Fraunhofer Institute for Energy Economics and Energy System Technology(IEE) Germany Kassel University:Intelligent Embedded Systems Germany TenneT TSO BV Netherlands AI Lab Reseau de Transport d’Electricite(RTE)France Kiel University:Intelligent Systems Germany

The operation of electricity grids has become increasingly complex due to the current upheaval and the increase in renewable energy *** a consequence,active grid management is reaching its limits with conventional *** the context of the Learning to Run a Power Network(L2RPN)challenge,it has been shown that Reinforcement Learning(RL)is an efficient and reliable approach with considerable potential for automatic grid *** this article,we analyse the submitted agent from Binbinchen and provide novel strategies to improve the agent,both for the RL and the rule-based *** main improvement is a N-1 strategy,where we consider topology actions that keep the grid stable,even if one line is ***,we also propose a topology reversion to the original grid,which proved to be *** improvements are tested against reference approaches on the challenge test sets and are able to increase the performance of the rule-based agent by 27%.In direct comparison between rule-based and RL agent we find similar ***,the RL agent has a clear computational *** also analyse the behaviour in an exemplary case in more detail to provide additional ***,we observe that through the N-1 strategy,the actions of both the rule-based and the RL agent become more diversified.

关键词： Deep reinforcement learning Electricity grids Learning to run a power network Topology control Proximal policy optimisation

A Review of Transparent and Artificial Boundary Conditions Techniques for Linear and Nonlinear Schrodinger Equations

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Communications in Computational Physics 2008年第9期4卷 729-796页

作者： Xavier antoine Anton Arnold Christophe Besse Matthias Ehrhardt Achim Schadle Institut Elie Cartan Nancy(IECN) Universite Henri Poincare Nancy 1UMR 7502INRIA CoridaNancy-UniversiteFrance. Institut fur Analysis und Scientific Computing Technische Universitat WienWiedner Hauptstr.81040 WienAustria. Project-Team SIMPAF INRIA Lille Nord Europe Research Centre Laboratoire Paul Painleve U.M.R CNRS 8524 Universite des Sciences et Technologies de LilleFrance. Weierstrass Institute for Applied Analysis and Stochastics Mohrenstr.3910117 BerlinGermany. Zuse-Institut Berlin Takustrasse 714195 BerlinGermany.

In this review article we discuss different techniques to solve numerically the time-dependent Schrodinger equation on unbounded *** present in detail the most recent approaches and describe briefly alternative ideas pointing out the relations between these *** conclude with several numerical examples from different application areas to compare the presented *** mainly focus on the one-dimensional problem but also touch upon the situation in two space dimensions and the cubic nonlinear case.

关键词： Schrodinger equation transparent boundary conditions discrete convolution unbounded domain finite difference schemes finite elements

Study of infectious conjunctivitis among children in rural areas of Qinghai province

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Science China(Life Sciences) 2016年第6期59卷 548-554页

作者： Qingfeng Liang Xinxin Lu Mei Wang Lei Tian antoine Labbé Ailian Hu Beijing Institute of Ophthalmology Beijing Tongren Eye CenterBeijing Tongren HospitalCapital Medical UniversityBeijing Key Laboratory of Ophthalmology and Visual SciencesBeijing 100005China Quinze-Vingts National Ophthalmology Hospital Paris and Versailles Saint-Quentin-en-Yvelines UniversityVersailles F-75002 France 31NSERM U968UPMC Univ Paris 06UMR_S 968institut de la VisionCNRSUMR_7210Paris F-75012France

Infectious conjunctivitis is no longer a common eye disease in cities and developed areas, but in remote mountainous regions of China where living conditions are relatively under-developed, the occurrence of infectious conjunctivitis remains a public health issue. Here, we evaluate the ratio of infectious conjunctivitis among primary school students in the rural areas of Xunhua, Huangyuan, and Huzhu Counties in the Qinghai province of China, and report the microorganisms involved in causing infection. Of the 765 eligible primary school students, 694 participated to this study(a response rateof 90.7%), 381 boys and 313 girls, with a mean age of 7.52 years(range 7–9 years). A clinical diagnosis of infectious conjunctivitis was returned for 238 of the 694 children examined. The ratio of infectious conjunctivitis in Xunhua County(46.64%) was higher compared to that in Huangyuan(26.67%; P=0.03) and Huzhu Counties(23.61%; P=0.02). The leading cause of conjunctivitis was bacterial, followed by chlamydial and viral. Our results show that there is a high ratio of infectious conjunctivitis among rural primary school students in Qinghai province.

关键词： conjunctivitis rural children bacteria chlamydia

Kinetic study of phytotoxicity induced by foliar lead uptake for vegetables exposed to fine particles and implications for sustainable urban agriculture

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Journal of Environmental Sciences 2016年第8期28卷 16-27页

作者： TianTian Xiong Annabelle Austruy antoine Pierart Muhammad Shahid Eva Schreck Stéphane Mombo Camille Dumat Université de Toulouse Institut National Polytechnique de Toulouse-Ecole Nationale Supérieure Agronomique de Toulouse (INP-ENSAT) Centre National de la Recherche Scientifique Institut Ecocitoyen Centre de Vie la Fossette RD 268 Department of Environmental Sciences COMSATS Institute of Information Technology Géosciences Environnement Toulouse (GET) Observatoire Midi Pyrénées Université de Toulouse Centre d'Etude et de Recherche Travail Organisation Pouvoir (CERTOP) UMR5044 Universite J. Jaurès - Toulouse II

At the global scale, foliar metal transfer occurs for consumed vegetables cultivated in numerous urban or industrial areas with a polluted atmosphere. However, the kinetics of metal uptake, translocation and involved phytotoxicity was never jointly studied with vegetables exposed to micronic and sub-micronic particles（PM）. Different leafy vegetables（lettuces and cabbages） cultivated in RHIZOtest？ devices were, therefore, exposed in a greenhouse for 5, 10 and 15 days to various Pb O PM doses. The kinetics of transfer and phytotoxicity was assessed in relation to lead concentration and exposure duration. A significant Pb accumulation in leaves（up to 7392 mg/kg dry weight（DW） in lettuce） with translocation to roots was observed. Lead foliar exposure resulted in significant phytotoxicity, lipid composition change, a decrease of plant shoot growth（up to 68.2% in lettuce） and net photosynthesis（up to 58% in lettuce）. The phytotoxicity results indicated plant adaptation to Pb and a higher sensitivity of lettuce in comparison with cabbage. Air quality needs, therefore, to be considered for the health and quality of vegetables grown in polluted areas, such as certain megacities（in China, Pakistan, Europe, etc.） and furthermore, to assess the health risks associated with their consumption.

关键词： Metallic particles Vegetables Foliar uptake Transfer kinetics and phytotoxicity

Diallel analyses of soluble sugar content in cowpea (Vigna unguiculata ***.)

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The Crop Journal 2017年第6期5卷 553-559页

作者： Maina antoine Nassourou Tchiagam Jean Baptiste Noubissié Yanou Nicolas Njintang Joseph Martin Bell Department of Biological Sciences Faculty of Science University of Ngaoundéré P.O. Box 454 Ngaoundéré Cameroon Department of Food Science and Nutrition ENSAI University of Ngaoundéré P.O. Box 455 Ngaoundéré Cameroon Genetics and Plant Breeding Unit Department of Plant Biology Faculty of Science University of Yaoundé I P.O. Box 812 Yaoundé Cameroon

The content of soluble sugar in cowpea(Vigna unguiculata L. Walp.) seeds is important for their acceptability to consumers. The objective of this study was to evaluate the genetic control of soluble sugar content in cowpea using diallel analysis. For this purpose,half-diallel crosses were made among seven diverse parents. The amount of total soluble sugar was estimated by the phenol sulfuric acid reagent method and reducing sugar were measured by the DNS(3,5-dinitrosalicylic acid) reagent method. The total soluble sugar ranged from 11.12(VYA) to 40.79 mg g^(-1)(IT93 K-693-2) with a mean of 22.31 mg g^(-1).Reducing soluble sugar showed a mean value of 9.11 mg g^(-1) and ranged from 13.61(TVx3236) to 4.98 mg g^(-1)(Lori niebe). Diallel analysis showed that both additive and non-additive gene effects were significant in the genetic control of these traits. However,dominance variance was greater than additive variance for soluble sugar. The traits were controlled mainly by an overdominance model, suggesting the advantage of delaying selection to later generations. Soluble sugar content was found to be highly heritable, with broad-sense heritability ranging from 0.987 to 0.976. Narrow-sense heritability ranged from0.154 to 0.422 and revealed the lower importance of additive variance. Parents and F_1 hybrids differed significantly on the basis of their general and specific combining abilities,respectively. Recessive alleles had positive effects on total soluble sugar and reducing soluble sugar. These results could help cowpea breeders improve the acceptability of cowpea seeds and cowpea-based foods by appropriate selection.

关键词： Cowpea Genetic improvement Diallel analysis Soluble sugar

Non-glide effects and dislocation core fields in BCC metals

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npj Computational Materials 2019年第1期5卷 178-185页

作者： antoine Kraych Emmanuel Clouet Lucile Dezerald Lisa Ventelon François Willaime David Rodney Institut Lumière Matière UniversitéLyon 1-CNRSVilleurbanne F-69622France DEN-Service de Recherches de Métallurgie Physique CEAUniversitéParis-SaclayGif-sur-Yvette F-91191France Institut Jean Lamour CNRS UMR 7198Universitéde LorraineF-54000 NancyFrance DEN-Département des Matériaux pour le Nucléaire CEAUniversitéParis-SaclayGif-sur-Yvette F-91191France

A hallmark of low-temperature plasticity in body-centered cubic(BCC)metals is its departure from Schmid’s *** aspect is that non-glide stresses,which do not produce any driving force on the dislocations,may affect the yield *** show here that this effect is due to a variation of the relaxation volume of the 1/2screw dislocations during *** predict quantitatively nonglide effects by modeling the dislocation core as an Eshelby inclusion,which couples elastically to the applied *** model explains the physical origin of the generalized yield criterion classically used to include non-Schmid effects in constitutive models of BCC *** use first-principles calculations to properly account for dislocation cores and use tungsten as a reference BCC ***,the methodology developed here applies to other BCC metals,other energy models and other solids showing nonglide effects.

关键词： dislocation metals plasticity

Concomitant autoimmune and genetic pancreatitis leads to severe inflammatory conditions

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World Journal of Gastroenterology 2008年第16期14卷 2596-2598页

作者： Jean Louis Frossard Jean Marc Dumonceau Catherine Pastor Laurent Spahr antoine Hadengue Division de Gastroentérologie et Hépatologie Geneva University Hospital

Chronic pancreatitis characterized by an early onset should be extensively investigated including the search for a mutation of the PRSS1, SPINK-1 or CFTR genes and potential features of autoimmune pancreatitis. We here describe a case of chronic pancreatitis with an onset at a very young age in which a mutation of the PRSS1 and several features of autoimmune pancreatitis were identified.

关键词： Chronic pancreatitis Genetics Autoimmunepancreatltis SPINK-1 CFTR PRSS1

Impact of climate factors on contact rate of vector-borne diseases： Case study of malaria

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International Journal of Biomathematics 2017年第1期10卷 77-97页

作者： Ezekiel Dangbe antoine Perasso Damakoa Irepran David Bekol1e The University Institute of Technology University of Ngaoundere UMR6249 Chrono-Environment Laboratory University of Franche-Comte The Faculty of Sciences University of Ngaoundere P. O. Boz 454 Ngaoundere Cameroon

Climate change influences more and more of our activities. These changes led to envi- ronmental changes which has in turn affected the spatial and temporal distribution of the incidence of vector-borne diseases. To establish the impact of climate on contact rate of vector-borne diseases, we examine the variation of prevalence of diseases according to season. In this paper, the goal is to establish that the basic reproductive number R0 depends on the duration of transmission period and the date of the first conta- mination case that was declared （to） in the specific ease of malaria. We described the dynamics of transmission of malaria by using non-autonomous differential equations. We analyzed the stability of endemic equilibrium （EE） and disease-free equilibrium （DFE）. We prove that the persistence of disease depends on minimum and maximum values of contact rate of vector-borne diseases.

关键词： SIR models vector-borne disease impact of climate factors malaria.

Jurassic Amber in Lebanon

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Acta Geologica Sinica(English Edition) 2010年第4期84卷 977-983页

作者： Dany AZAR Raymond GEZE antoine EL-SAMRANI Jacaueline MAALOULY André NEL Department of Natural Sciences Faculty of Sciences ⅡLebanese UniversityFanarLebanon Museum National d'Histoire Naturelle ParisFrance

Reports of amber predating the Lower Cretaceous are unusual and scarce; they mostly refer to amber pieces of millimetric dimension. In the present study, we report the discovery of 10 new outcrops of Jurassic amber in Lebanon. Some of these had large centimetric-sized pieces of amber. The new localities are described, amber is characterized, and its infrared spectra given. Although the new Jurassic amber yielded to date no more than fungal inclusions, this material is significant and promising. The discovery, of several Jurassic outcrops provides crucial information on the prevailing paleoenvironment of that time.

关键词： amber Lebanon Late Jurassic Kimmeridgian infrared spectrum