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The flip side of the coin:ecological function of the bee-hawking Asian hornet

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Integrative Zoology 2020年第2期15卷 156-159页

作者： Gao CHEN Zhiming ZHANG guillaume CHOMICKI Weibang SUN Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations KunmingChina CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunmingChina Institute of Ecology and Geobotany School of Ecology and Environmental SciencesYunnan UniversityKunmingChina Department of Plant Sciences University of OxfordUK The Queen’s College High StreetOxfordUK

Biological invasions around the world have experienced an unprecedented increase over the past few decades as a result of global change,worldwide trade and human mobility(Mack et al.2000).Invasive species have serious ecological and economic impacts across the *** the areas with high levels of invasion,Europe faces the greatest biological invasion(van Kleunen et al.2015).The European Union commissioned a report on invasive alien species to assess their ecological and economic ***,the Asian bee-hawking hornet Vespa velutina Lepeletier,1836 is in the line of fire in Europe(Rome&Villemant 2016).This hornet species is known as a serious predator of pollinators(such as honeybees),thus severely affecting insect pollination as well as apiculture in various European countries(Villemant et al.2011).

关键词： invasion king function

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An impossible dream

An impossible dream

PENALIZED LEAST SQUARE IN SPARSE SETTING WITH CONVEX PENALTY AND NON GAUSSIAN ERRORS

作者： guillaume Serina

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Acta Mathematica Scientia 2021年第6期41卷 2198-2216页

作者： Doualeh ABDILLAHI-ALI Nourddine AZZAOUI Arnaud GUILLIN guillaume LE MAILLOUX Tomoko MATSUI Laboratoire de Mathématiques Blaise Pascal CNRS-UMR 6620Université Clermont-Auvergne(UCA)63000Clermont-FerrandFrance Department of Statistical Modeling Institute of Statistical Mathematics10-3 Midori-choTachikawa-shiTokyo1908562Japan

This paper consider the penalized least squares estimators with convex penalties or regularization *** provide sparsity oracle inequalities for the prediction error for a general convex penalty and for the particular cases of Lasso and Group Lasso estimators in a regression *** main contribution is that our oracle inequalities are established for the more general case where the observations noise is issued from probability measures that satisfy a weak spectral gap(or Poincaré)inequality instead of Gaussian *** illustrate our results on a heavy tailed example and a sub Gaussian one;we especially give the explicit bounds of the oracle inequalities for these two special examples.

关键词： penalized least squares Gaussian errors convex penalty

Microclimatic parameters affect Cladosporium rot development and berry quality in table grapes

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Horticultural Plant Journal 2022年第2期8卷 171-183页

作者： Dhanasekaran Solairaj Ngolong Ngea guillaume Legrand Qiya Yang Jizhan Liu Hongyin Zhang School of Food and Biological Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Key Laboratory of Modern Agricultural Equipment and Technology Ministry of EducationJiangsu UniversityZhenjiang 212013JiangsuChina

Cladosporium cladosporioides is an emerging pathogenic fungus that causes Cladosporium rot in postharvest table grapes(Vitis vinifera). However,studies investigating the infection process of C. cladosporioides are lacking. Therefore, this study aimed to elucidate the infection process by investigating the influence of microclimatic parameters(temperature, wetness and fungal age) in C. cladosporioides pathogenesis, activities of grape defense-related enzymes and grape quality during the infection. C. cladosporioides effectively infects grapes by developing distinct colonies on the artificial wounds and berry surfaces, completing its life cycle within 48 h. The C. cladosporioides disease incidence optimally occurred at 20 ℃ and 25 ℃. Wetness played an influential role in the infectivity of C. cladosporioides and 7-day-old C. cladosporioides resulted in the most serious disease incidence of table grapes. As a result of infection, the quality of grapes was affected, including berry weight, p H, titratable acidity(TA), total soluble solids(TSS), and ascorbic acid level. This infection also induced defense-related enzymes, including polyphenoloxidase(PPO), peroxidase(POD), phenylalanine ammonialyase(PAL), and catalase(CAT), at certain times. The findings of this study demonstrated that Cladosporium rot development depended on the microclimatic parameters of grapes, significantly affected the grape quality and induced grape's defense-related enzymes.

关键词： Cladosporium cladosporioides Table grape Pathogenesis Infection

Experimental and Numerical Investigation on Compressor Cascade Flows with Tip Clearance at a Low Reynolds Number Condition

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Journal of Thermal Science 2011年第6期20卷 481-485页

作者： Hiromasa Kato Hideo Taniguchi Kazunari Matsuda Ken-ichi Funazaki Dai Kato guillaume Pallot Department of Mechanical Engineering Faculty of EngineeringIwate University Aerodynamic Technology Group IHI Corporation

High flow rate aeroengines typically employ axial flow compressors, where aerodynamic loss is predominantly due to secondary flow features such as tip leakage and comer vortices. In very high altitude missions, turbo- machinery operates at low density ambient atmosphere, and the recent trend toward more compact engine core inevitably leads to the reduction of blade size, which in turn increases the relative height of the blade tip clearance. Low Reynolds number fiowfield as a result of these two factors amplifies the relative importance of secondary flow effects. This paper focuses on the behavior of tip leakage flow, investigating by use of both experimental and numerical approaches. In order to understand the complex secondary flow behavior, cascade tests are usually conducted using intrusive probes to determine the loss. However relatively few experimental studies are pub- lished on tip leakage flows which take into account the interaction between a rotating blade row and its casing wall. Hence a new linear cascade facility has been designed with a moving belt casing in order to reproduce more realistic flowfield as encountered by a rotating compressor row. Numerical simulations were also performed to aid in the understanding of the complex flow features. The experimental results indicate a significant difference in the flowfield when the moving belt casing is present. The numerical simulations reveal that the leakage vortex is pulled by the shearing motion of the endwall toward the pressure side of the adjacent blade. The results highlight the importance of casing wall relative motion in analyzing leakage flow effects.

关键词： compressor tip leakage flow

Event management architecture for the monitoring and diagnosis of a fleet of trains: a case study

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Journal of Modern Transportation 2019年第3期27卷 169-187页

作者： Adoum Fadil Damien Trentesaux guillaume Branger LAMIH UMR CNRS 8201 Polytechnic University Hauts-de-France59313 ValenciennesFrance Bombardier Transport 59154 CrespinFrance SNCF 56 av.Pompidou37700 Saint Pierre des CorpsFrance

In recent years, more and more manufacturers and operators of fleets of mobile systems have been focusing their efforts on studying and developing condi-tional maintenance, monitoring, and diagnostic strategies to cope with an increasingly competitive, unstable, costly, and unpredictable environment. This paper proposes a case study concerning the application of a novel event management architecture, called EMH^2, to a fleet of trains. This EMH^2 architecture, which applies the holonic paradigm, aims to facilitate the monitoring and diagnosis of a fleet of mobile systems. It is based on a recursive decomposition of cooperative monitoring holons. The definition of a generic event modeling, called SurfEvent, is the second key element of the contribution. EMH^2 has been designed to be applicable to any kind of system or equipment up to fleet level. The edge computing paradigm has been adopted for implementation purpose. The EMH^2 architecture is designed to facilitate asynchronous and progressive onboard and off-board deployments. A real-world application of EMH^2 to a fleet of ten trains cur-rently in use, in collaboration with our industrial partner, Bombardier Transport, is presented. Three key perfor-mances indicators have been estimated by comparing EMH^2 with the current industrial situation. These indi-cators are (1) the number of fleet maintenance visits,(2) the time needed by a maintenance operator to investigate and diagnose, and (3) the time needed by the system to update data regarding the health status and monitoring of trains. Results obtained outperformed industrial expecta-tions. The paper finally discusses feedbacks from experi-ence and limitations of the work.

关键词： Event management system Holonic architecture Monitoring Diagnosis Condition-based maintenance Rail transportation

A Low-Cost, Portable Optical Sensing System With Wireless Communication Compatible of Real-Time and Remote Detection of Dissolved Ammonia

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Photonic Sensors 2016年第2期6卷 107-114页

作者： Shijie DENG William DOHERTY Michael AP MCAULIFFE Urszula SALAJ-KOSLA Liam LEWIS guillaume HUYET Centre for Advanced Photonics & Process Analysis Cork Institute of Technology and Tyndall National Institute CorkIreland Department of Physical Science Cork Institute of Technology Cork Ireland Department of Chemical and Environmental Science University of Limerick Limerick Ireland

A low-cost and portable optical chemical sensor based ammonia sensing system that is capable of detecting dissolved ammonia up to 5 ppm is presented. In the system, an optical chemical sensor is designed and fabricated for sensing dissolved ammonia concentrations. The sensor uses eosin as the fluorescence dye which is immobilized on the glass substrate by a gas-permeable protection layer. A compact module is developed to hold the optical components, and a battery powered micro-controller system is designed to read out and process the data measured. The system operates without the requirement of laboratory instruments that makes it cost effective and highly portable. Moreover, the calculated results in the system can be transmitted to a PC wirelessly, which allows the remote and real-time monitoring of dissolved ammonia.

关键词： Ammonia sensing optical chemical sensor portable optical sensing system remote sensing

Strong dependency of the tribological behavior of CuZr-based bulk metallic glasses on relative humidity in ambient air

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Friction 2023年第5期11卷 785-800页

作者： Solène BARLEMONT Paul LAFFONT Rémi DAUDIN Alexis LENAIN guillaume COLAS Pierre-Henri CORNUAULT Femto-ST Institute Department of Applied MechanicsUniversity of Bourgogne Franche-ComtéCNRS/UFC/ENSMM/UTBMBesançon 25030France University of Grenoble Alpes CNRSSIMaPGrenoble 38000France Vulkam Inc.Amorphous metal micro casting Gières 38610France

Thanks to their outstanding mechanical properties,Bulk Metallic Glasses(BMGs)are new alternatives to traditional crystalline metals for mechanical and micromechanical applications including power ***,the tribological properties of BMGs are still poorly understood,mostly because their amorphous nature induces counter intuitive responses to friction and *** the present study,four different BMGs(Cu_(47)Zr_(46)Al_(7),Zr_(46)Cu_(45)Al_(7)Nb_(2),Zr_(60)Cu_(28)Al_(12),and Zr_(61)Cu_(25)Al_(12)Ti_(2))underwent ball-on-disc friction tests against 100Cr6 steel balls(American Iron and Steel Institute(AISI)52100)at different relative humidities(RHs)ranging from 20%to 80%.Controlling humidity enabled to observe a high repeatability of the friction and wear responses of the ***,the friction coefficient decreased by a factor of 2 when the humidity was increased,and the wear rate of BMGs was particularly low thanks to a 3rd-body tribolayer that forms on the BMG surface,composed of oxidized wear particles originating from the *** morphology of this tribolayer is highly correlated to *** study also identifies how the tribolayer is built up from the initial contact until the steady state is achieved.

关键词： Bulk Metallic Glasses(BMGs) tribology oxide transfer layer relative humidity(RH)

The unbearable lightness of sequenced-based identification

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Fungal Diversity 2019年第3期96卷 243-284页

作者： Valerie Hofstetter Bart Buyck guillaume Eyssartier Sylvain Schnee Katia Gindro Departement federal del’economie de la formation et de la recherche DEFRRoutede Duillier 60CP10121260 Nyon 1Switzerland Institut de Systematique EvolutionBiodiversite(ISYEB-UMR 7205)Museum Nationald’Histoire NaturelleSorbonne UniversiteCNRSCP3912 Rue Buffon75005 ParisFrance Perigueux France

Using the basic GenBank local alignment search tool program(BLAST)to identify fungi collected in a recently protected beech forest at Montricher(Switzerland),the number of ITS sequences associated to the wrong taxon name appears to be around 30%,even higher than previously *** results rely on the in-depth re-examination of BLAST results for the most interesting species that were collected,*** records for Switzerland,rare or patrimonial species and problematic species(when BLAST top scores were equally high for different species),all belonging to *** paper dissects for the first time a number of sequence-based identifications,thereby showing in every detail—particularly to the user community of taxonomic information—why sequence-based identification in the context of a fungal inventory can easily go *** first conclusion is that in-depth examination of BLAST results is too time consuming to be considered as a routine approach for future inventories:we spent two months on verification of approx.20 *** from the fact that poor taxon coverage in public depositories remains the principal impediment for successful species identification,it can be deplored that even very recent fungal sequence deposits in GenBank involve an uncomfortably high number of misidentifications or errors with associated *** checking the original publications associated with top score sequences for the few examples that were here re-examined,a positive consequence is that we uncovered over 80 type sequences that were not annotated as types in *** and pitfalls of sequence-based identification are discussed,particularly in the light of undertaking fungal *** are made to avoid or reduce some of the major problems with sequence-based ***,the prospects for a more reliable sequence-based identification of fungi remain quite dim,unless authors are ready to check and update the

关键词： Fungal inventory GenBank Nuclear ribosomal DNA internal transcribed spacers(ITS) Switzerland Type sequence