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Review of the development and uses of hard grade asphalts in France

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Journal of Road Engineering 2021年第1期1卷 73-79页

作者： jean-francois Corte Directorate of Transport Infrastructures Ministry of TransportLa Defense 92055France

Hard grade paving asphalts,i.e.,having a penetration at 25C lower than 25 mm/10,have experienced,in France,a significant development over the last forty years,linked to the development of high modulus asphalt concrete for rehabilitation then for new construction of road *** the first part,this paper provides a review of the evolution of asphalts in France over the past sixty years towards the use of harder penetration grades and a limitation of the evolution of the asphalt in the mixing plant to avoid early cracking of the *** recommendations in relation to climatic conditions are *** characteristics of different hard asphalts produced in France are presented including data on the effect of ageing tests rolling thin film oven test(RTFOT)and pressure ageing vessel(PAV).Hardening of hard asphalt after RTFOTþPAV is comparable to that of softer *** performance related to low temperature cracking is less which limits the use of plain hard asphalt in pavements subjected to severe winter conditions and requires polymer *** specifications for hard grade paving asphalts based on traditional empirical tests included in the European standard developed in the mid 2000s and the choices made in France are presented.A comparison of the specifications for hard grade paving asphalts in the European standards and of those proposed for China shows that the European specifications are more stringent as regards consistency and evolution after ageing tests.

关键词： Asphalt Hard grade Rheology Standard

Computation of Shock Profiles in Radiative Hydrodynamics

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Communications in Computational Physics 2009年第10期6卷 1118-1136页

作者： jean-francois Coulombel Pauline Lafitte CNRS Laboratoire Paul Painleve and Project Team SIMPAF INRIA FutursUniversite Lille 1Cite Scientifique59655 VILLENEUVE D’ASCQ CedexFrance Laboratoire Paul Painleve and Project Team SIMPAF INRIA Futurs Universite Lille 1Cite Scientifique59655 VILLENEUVE D’ASCQ CedexFrance

This article is devoted to the construction of a numerical scheme to solve the equations of radiative *** use this numerical procedure to compute shock profiles and illustrate some earlier theoretical results about their smoothness and monotonicity *** first consider a scalar toy model,then we extend our analysis to a more realistic system for the radiative hydrodynamics that couples the Euler equations and an elliptic equation.

关键词： Radiative transfer shock profiles Euler equations numerical profiles

Oil Strategies Benefits over Different Driving Cycles using Numerical Simulation

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Journal of Thermal Science 2017年第4期26卷 371-377页

作者： Hanna SARA David CHALET Mickael CORMERAIS jean-francois HETET Ecole Centrale de Nantes LHEEA lab.(ECN/CNRS)NantesFrance MANN+HUMMEL France LavalFrance

95 g/kin is the allowed quantity of CO2 emission normalized to NEDC to be set in 2020. In addition, NEDC will be replaced by more severe driving cycles and will be united worldwide. To respond to those criteria, automotive industries are working on every possible field. Thermal management has been proved to be effective in reducing fuel consumption. Cold start is a primordial reason of ovcrconsumption, as the engine highest efficiency is at its optimal temperature. At cold start, the engine＇s oil is at its lowest temperature and thus its higher viscosity level. A high viscosity oil generates more friction, which is one of the most important heat losses in the engine. In th/s paper, hot oil storage is studied. Numerical simulations on GT-suite model were done. The model consists of a 4-cylinder turbocharged Diesel engine using a storage volume of 1 liter of hot oil. Ambient temperature vari- ation were taken into consideration as well as different driving cycles. Furthermore, different configurations of the thermal strategy （multifunction oil sump） were proposed and evaluated. Lubricant temperature and viscosity profiles are presented in the article as well as fuel consumption savings for different configurations, driving cycles and ambient temperatures.

关键词： Thermal management Hot oil storage Oil sump Oil viscosity Fuel consumption

Simple Fabrication and Characterization of Discontinuous Carbon Fiber Reinforced Aluminum Matrix Composite for Lightweight Heat Sink Applications

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Acta Metallurgica Sinica(English Letters) 2014年第4期27卷 714-722页

作者： Hiroki Kurita Emilien Feuillet Thomas Guillemet jean-Marc Heintz Akira Kawasaki jean-francois Silvain DEN/DANS/DMN/SRMA/LTMEx CEA SaclayGif-sur-YvetteFrance Institute of Condensed Matter Chemistry of Bordeaux BordeauxFrance Department of Materials Processing Graduate School of EngineeringTohoku University

The constant increase in power and heat flux densities encountered in electronic devices fuels a rising demand for lightweight heat sink materials with suitable thermal *** this study,discontinuous pitch-based carbon fiber reinforced aluminum matrix（Al-CF） composites with aluminum–silicon alloy（Al–Si） were fabricated through hot *** small amount of Al–Si contributed to enhance the sintering process in order to achieve fully dense Al–CF composites.A thermal conductivity and CTE of 258 W/（m K） and 7.0 9 10-6/K in the in-plane direction of the carbon fibers were obtained for a（Al95 vol%＋ Al–Si5 vol%）-CF50 vol%*** fiber provides the reducing of CTE while the conservation of thermal conductivity and weight of *** achieved CTEs satisfy the standard requirements for a heat sink material,which furthermore possess a specific thermal conductivity of 109 W cm3/（m K g）.This simple process allows the low-cost fabrication of Al–CF composite,which is applicable for a lightweight heat sink material.

关键词： Carbon fiber Metal-matrix composites(MMCs) Thermal properties Powder processing

Multiplexing technology for in vitro diagnosis of pathogens： the key contribution of phosphorus dendrimers

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Science China Materials 2018年第11期61卷 1454-1461页

作者： jean Pierre Majoral jean Marie francois Richard Fabre Alice Senescau Serge Mignani Anne-Marie Caminade Laboratoire de Chimie de Coordination du CNRS 31077 Toulouse Cedex 4France LCC-CNRS Universit6 de Toulouse CNRSToulouseFrance Dendris 31670 LabegeFrance LISBP UMR CNRS 5504 INRA 79231077 Toulouse Cedex 04France Universite Paris Descartes PRES Sorbonne Paris Cite CNRS-UMR 860Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicolgique75006 ParisFrance

After the microbiology based on Pasteur's method and polymerase chain reaction(PCR), the diagnosis company named Dendris has proposed a third-generation of diagnosis enabling the search of a broad range of pathogens with strong sensitivity and specificity. This extraordinary profile was possible thanks to the use of phosphorus dendrimers for which various techniques of deposition on a given support were investigated and described and analyzed in this report.

关键词： phosphorus dendrimers diagnosis DNA arrays multiplexing technology

Differences in egg hatching time between cyclical and obligate parthenogenetic lineages of aphids

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Insect Science 2019年第1期26卷 135-141页

作者： Charles-Antoine Dedryver Joel Bonhomme jean-francois Le Gallic jean-Christophe Simon Unite Mixte de Recherche IGEPP 1349 INRAIAgrocampus OuestlUniversite Rennes 1Le Rheu cedexFrance

Many aphid species exhibit a variation in reproductive mode which is influenced by winter climate regimes,with cyclical parthenogenetic (CP)lines dominating in cold winter areas (because they produce cold-resistant eggs)and obligate parthenogenetic (OP) ones in mild winter regions (because of their parthenogenetic overwintering).Genetic studies on several aphid species have shown that the OP trait can be transmitted during sexual events involving the 2 types of *** genetic system could be considered as a local safeguarding mechanism for OP alleles in case severe frost would have killed all parthenogenetically overwintering ***,this strategy would only be efficient in restoring local polymorphism in breeding systems if the newly hatched OP recombinants remain competitive over their CP *** this study we compared egg hatching sequences of CP and OP F1 clones from several crosses obtained for 2 cereal aphid species,Sitobion avenae (constant 5℃,8 h of light)and Rhopalosiphum padi (winter outdoor conditions).For ***,we obtained F1 offspring from 6 crosses, involving 4 clones while in *** F1 were obtained from 11 crosses involving 14 clones. We showed that in both species proportions of OP clones were higher in the first half of the progeny relative to the second *** addition,F1 OP clones hatched in the mean about a week earlier than their CP sibs,which gives them a demographic advantage at the start of the growth *** then discussed the consequences of this fitness advantage for the maintenance and spread of the OP trait in aphid populations.

关键词： asexuality diapauses genetic variation insects overwintering strategies reproductive mode

The potential value of intravascular ultrasound imaging in diagnosis of aortic intramural hematoma

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Journal of Geriatric Cardiology 2011年第4期8卷 224-229页

作者： Wei Hu francois Schiele Nicolas Meneveau Marie-France Seronde Pierre Legalery jean-francois Bonneville Sidney Chocron jean-Pierre Bassand Department of Cardiology Min Hang District Central HospitalShanghai 201100China Department of Cardiology University Hospital Jean MinjozBesançon 25000France Department of Radiology University Hospital Jean MinjozBesançon 25000France Department of Cardiac Surgery University Hospital Jean MinjozBesançon 25000France

Objective To evaluate the potential value of intravascular ultrasound(IVUS)imaging in the diagnosis of aortic intramural hematoma(AIH).Methods From September 2002 to May 2005,a consecutive series of 15 patients with suspected aortic dissection(AD)underwent both IVUS imaging and spiral computed tomography(CT).Six patients diagnosed as acute type B AIH by CT or IVUS composed the present study *** The study group consisted of five males and one female with mean age of 66 years *** of them had chest or back *** one patient,CT omitted a localized AIH and an associated penetrating atherosclerotic ulcer(PAU),which were detected by *** another patient,CT mistaken a partly thrombosed false lumen as an AIH,whereas IVUS detected a subtle intimal tear and slow moving blood in the false *** the four rest patients,both CT and IVUS made the diagnosis of AIH,however,IVUS detected three PAUs in three of them,only one of them was also detected by CT,and two of them escaped initial CT and were confirmed by follow up CT or magnetic resonance *** IVUS imaging is a safe examination and has high accuracy in the diagnosis of AIH,particularly for diagnosing localized AIH,distinguishing AIH with thrombosed classic AD and detecting accompanied small PAUs.

关键词： intravascular ultrasound diagnosis aortic intramural hematom

Is it possible to save the environment and satisify consumers with artificial meat?

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Journal of Integrative Agriculture 2015年第2期14卷 206-207页

作者： jean-francois Hocquette Herbivore Research Unit Member of JIA Editorial BoardNational Institute for Agricultural Research (INRA) Theix 63122 Saint-Genes Champanelle France

Our modern society is facing major challenges such as reducing world hunger by increasing protein resources despite an increase in protein demands due to the presence of more and more human beings on the earth. Other challenges include reducing potential environmental degradation due to human activities and also due to livestock. In addition to that, some people are concerned by reducing potential discomfort of animals on modern farms or maybe avoiding killing animals to eat them.

关键词： livestock concerned challenges avoiding maybe despite pleased acceptance discomfort technological

A comparison of the water management systems in France and China

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Frontiers of Environmental Science & Engineering 2013年第5期7卷 721-734页

作者： Xiaoliu YANG Jian XU jean-francois DONZIER Coralie NOEL College of Urban and Environmental Sciences Peking University Beijing 100871 China Asia-Pacific Centre for Water Security of Tsinghua University Beijing 100084 China International Office for Water and Permanent Technical Secretary of the International Network of Basin Organizations Paris 75008 France

This paper compares legal systems for water management in France and China, with a focus on integrated water resources management and regarding in particular the formulation of policies and their implemen- tation. The research shows that China has committed itself to the efficient management of water resources through the development of various policy tools during the current period. This commitment, however, has often been interrupted and distorted by politics, resulting in the neglect of socioeconomic and environmental priorities. France has developed a legislative framework and practical instruments to apply integrated water resources manage- ment at the river basin level since the 1960s. This experience and the current implementation of the European Water Framework Directive brings elements that can contribute to Chinese society meeting its water challenges.

关键词： legislation regulation water policy integrated river basin management protection of water quality,water permitting