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Heat Transfer Model with Two Heat Transfer Coefficients Along a M ultiperforated Plate-Application to Combustion Chamber Wall Cooling

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Journal of Thermal Science 2003年第4期12卷 363-366页

作者： brice Petre Eva Dorignac jean Jacques Vullierme Laboratoire d'Etudes Thermiques U.M.R C.N.R.S 6608-ENSMA BP 40109 86961 Futuroscope Chasseneuil Cedex FRANCELaboratoire d'Etudes Thermiques U.M.R C.N.R.S 6608-ENSMA BP 40109 86961 Futuroscope Chasseneuil Cedex FRANCELaboratoire d'Etudes Thermiques U.M.R C.N.R.S 6608-ENSMA BP 40109 86961 Futuroscope Chasseneuil Cedex FRANCE

Walls' cooling of aeronautic propeller combustion chamber is performed with the injection, through the combustion chamber wall, of a part of the air coming from compressors placed upstream. Measurements of the wall thermal fields are made by infrared thermography along the injection wall. This injection wall is pierced by 9 rows of 8 holes (α=90°) in staggered configuration (p/D=s/D=6). We propose a model using two heat transfer coefficients to represent the convective exchanges. The results are non-dimensioned and presented in comparison with the case without holes. The use of this model allows us to define 4 zones. Those 4 zones exist for the 5 blowing rates.

关键词： multiperforation cooling heat transfer coefficients infrared thermography.

Glycemic Index of Sugars Extracted from Immature Coconut Water: Case of Coconut Palms (<i>Cocos nucifera</i>L.) WAT, MYD and PB121<sup>+</sup>

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Journal of Biosciences and Medicines 2018年第8期6卷 99-110页

作者： Akpro Lathro Anselme Gbogouri Grodji Albarin Konan Konan jean-Louis gbakayoro jean brice Nemlin Gnopo jean Laboratory of Nutrition and Food Safety UFR-STA University Nangui Abrogoua Abidjan C&ocirc te d’Ivoire Laboratory of Technology and Oil Analyse Research Station Marc Delorme CNRA Abidjan C&ocirc te d’Ivoire Technological Research Station of Bingerville CNRA Abidjan C&ocirc te d’Ivoire

In order to do a best stipulation on her consumption, it is necessary to know if a food provoke faintly, fairly or highly the glyceamia. The aim of this work was to evaluate the glycemic index of coconut water sugar from three coconuts varieties. So, with a cohort of 15 people, a capillary blood was collect after sugar ingestion and the glycaemia read directly on a glucometer. The result showed that the brown and white sugar from coconut sugar can be classified as low glycemic index food. Also, the glycemic indexes of white coconut water sugar are 2 to 3 more lower than that the brown sugar. The glycemic indexes of sugars vary according to the variety of coconut used. The sugars of the coconut palm (MYD) are more hyper-glycemic than those of the hybrid (PB121+) which is more hyperglycemic than the sugars of the coconut palm (WAT). Thus, with a controlled consumption, the coconut water sugars could be the sugars that are best for the health of the healthy and diabetic populations because it raises slightly the postprandial glucose.

关键词： Glycemic Index Brown Sugar White Sugar Coconut Water Sugar Glycemic Response

Multidisciplinary management of Mirizzi syndrome with cholecystobiliary fistula: the value of minimally invasive endoscopic surgery

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Hepatobiliary & Pancreatic Diseases International 2015年第5期14卷 543-547页

作者： Fabien Le Roux Charles Sabbagh brice Robert Thierry Yzet Laurent Dugue jean-Paul Joly jean-Marc Regimbeau Department of Digestive and Oncological Surgery Amiens University Hospital Jules Verne University of Picardie Department of Interventional and Diagnostic Imaging Amiens University Hospital Jules Verne University of Picardie Department of Digestive Surgery Saint-Camille Hospital Department of Hepatogastroenterology Amiens University Hospital Jules Verne University of Picardie

Mirizzi syndrome, a rare complication of gallstones, is defined by obstruction of the main bile duct. This obstruction may worsen and thus result in cholecystobiliary fistula. Surgical management of Mirizzi syndrome is complicated by the presence of inflamed tissue around the hepatic pedicle, making it impossible to distinguish between the main bile duct and the gallbladder. The surgeon＇s first task is to perform subtotal cholecystotomy（from the fundus of the gallbladder to the neck） without trying to locate the cystic duct. In a second step, the gallstones are extracted and the main bile duct is then repaired. In most cases, a T-tube is used to drain the main bile duct, and abdominal drainage is left in place（in case a bile fistula forms）. This study concluded that preoperative drainage of the main bile duct in the treatment of Mirizzi syndrome types II and III is feasible and might help to decrease the postoperative complication rate.

关键词： jaundice Mirizzi syndrome cholecystobiliary fistula endoscopic treatment cholecystectomy T-tube drain

Assessment of Climate Change Impact on Water Requirement and Rice Productivity

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Rice science 2023年第4期30卷 276-293页

作者： Konan jean-Yves N’GUESSAN Botou ADAHI Arthur-brice KONAN-WAIDHET Satoh MASAYOSHI Nogbou Emmanuel ASSIDJO Environmental Training and Research Unit Laboratory of Environmental Sciences and TechnologiesUniversitéJean Lorougnon GuédéBP 150 DaloaCôte d’Ivoire Department of Training and Research of Rural Engineering and Geographic Sciences Institut National Polytechnique FÉLIX HOUPHOUËT-BOIGNYBP 1093 YamoussoukroCôte d’Ivoire University of Tsukuba Ibaraki 305-8577Japan Department of Training and Research of Chemical and Food Engineering Laboratory of ModellingInformation and ProcessesInstitut National Polytechnique FÉLIX HOUPHOUËT-BOIGNYBP 1093 YamoussoukroCôte d’Ivoire

Assessing the impact of climate change(CC)on agricultural production systems is mainly done using crop models associated with climate model *** review is one of the few,with the main objective of providing a recent compendium of CC impact studies on irrigation needs and rice yields for a better understanding and use of climate and crop *** discuss the strengths and weaknesses of climate impact studies on agricultural production systems,with a particular focus on uncertainty and sensitivity analyses of crop *** the new generation global climate models(GCMs)are more robust than previous ones,there is still a need to consider the effect of climate uncertainty on estimates when using *** GCMs cannot directly simulate the agro-climatic variables of interest for future irrigation assessment,hence the use of intelligent climate ***,sensitivity and uncertainty analyses must be applied to crop models,especially for their calibration under different *** impacts of CC on irrigation needs and rice yields vary across regions,seasons,varieties and crop ***,integrated assessments,the use of remote sensing data,climate smart tools,CO_(2)enrichment experiments,consideration of changing crop management practices and multi-scale crop modeling,seem to be the approaches to be pursued for future climate impact assessments for agricultural systems。

关键词： climate change rice production irrigation crop model climate model

Effect of preoperative renin-angiotensin system blockade on vasoplegia after cardiac surgery:A systematic review with metaanalysis

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World Journal of Cardiology 2022年第4期14卷 250-259页

作者： jean Jacques Noubiap brice Nouthe Ying Tung Sia Marco Spaziano Centre for Heart Rhythm Disorders The University of AdelaideAdelaide 5000South AustraliaAustralia Department of Medicine University of British ColumbiaVancouver V6T 1W5Canada Department of Medicine Regional Trois-Rivières Hospital(CIUSSS-MCQ)Trois-Rivières 5000Canada Department of Cardiology McGill University Health CentreMontréal QC H4A 3J1Canada

BACKGROUND Vasoplegia is a common complication of cardiac surgery but its causal relationship with preoperative use of renin angiotensin system(RAS)blockers[angiotensin converting enzyme inhibitors(ACEIs)and angiotensin receptor blockers(ARB)]is still *** To update and summarize data on the effect of preoperative use of RAS blockers on incident *** All published studies from MEDLINE,EMBASE,and Web of Science providing relevant data through January 13,2021 were identified.A random-effects metaanalysis method was used to pool estimates,and post-cardiac surgery shock was differentiated from *** Ten studies reporting on a pooled population of 15672 patients(none looking at ARBs exclusively)were included in the *** were case-control *** of ACEIs was associated with an increased risk of vasoplegia[pooled adjusted odds ratio(Aor)of 2.06,95%CI:1.45-2.93]and increased inotropic/vasopressor support requirement(pooled aOR 1.19,95%CI:1.10-1.29).Post-cardiac surgery shock was increased in the presence of left ventricular dysfunction(pooled aOR 2.32,95%CI:1.60-3.36;I249%)but not increased by the use of beta blockers(pooled aOR 0.78,95%CI:0.36-1.69;I277%).Two randomized control trials(RCTs),not eligible for the meta-analysis,did not show an association between continuation of RAS blockers and *** Preoperative continuation of ACEIs is associated with an increased need for inotropic support postoperatively and with an increased risk of vasoplegia in observational studies but not in *** absence of a consensus definition of vasoplegia should lead to the use of perioperative cardiovascular monitoring when designing RCTs to better understand this discrepancy.

关键词： Vasoplegia Cardiac surgery Coronary artery bypass graft Angiotensin converting enzyme inhibitors

Geochemical constraints on the origin and tectonic setting of the serpentinized peridotites from the Paleoproterozoic Nyong series,Eseka area,SW Cameroon

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Acta Geochimica 2020年第3期39卷 404-422页

作者： Philomene Nga Essomba Tsoungui Sylvestre Ganno Evine Laure Tanko Njiosseu jean Lavenir Ndema Mbongue brice Kamguia Woguia Landry Soh Tamehe Jonas Didero Takodjou Wambo jean Paul Nzenti Department of Earth Sciences University of Yaounde IP.O.Box 3412MessaYaoundeCameroon Department of Earth Sciences University of DschangP.O.Box.67DschangCameroon Key Laboratory of CBM Resources and Reservoir Formation Process Chinese Ministry of EducationChina University of Mining and TechnologyXuzhou 221116JiangsuChina

Serpentinized rocks closely associated with Paleoproterozoic eclogitic metabasites were recently discovered at Eseka area in the northwestern edge of the Congo craton in southern ***,we present new field data,petrography,and first comprehensible wholerock geochemistry data and discuss the protolith and tectonic significance of these serpentinites in the *** studied rock samples are characterized by pseudomorphic textures,including mesh microstructure formed by serpentine intergrowths with cores of olivine,bastites after *** constitutes almost the whole bulk of the rocks and is associated(to the less amount)with tremolite,talc,spinel,and ***-rock chemistry of the Eseka serpentinites led to the distinction of two *** 1 has high MgO(>40 wt%)content and high Mg#values(88.80)whereas Type 2 serpentinite samples display relatively low MgO concentration and Mg#values(50 ppm).This similarity,associated with the high Cr contents,spinel-peridotite protolith compositions and Mg/Si and Al/Si ratios imply that the studied serpentinites were formed in a subductionrelated *** U-shaped chondrite normalizedREE patterns of serpentinized peridotites,coupled with similar enrichments in LREE and HFSE,suggest the refertilized nature due to melt/rock interaction prior to *** on the results,we suggest that the Eseka serpentinized peridotites are mantle residues that suffered a high degree of partial melting in a subductionrelated environment,especially in Supra Subduction Zone *** new findings suggest that the Nyong series in Cameroon rep

关键词： Serpentinites Mantle peridotites Melt/rock interaction Paleoproterozoic suture zone Eseka area Nyong series Congo/Sao Francisco cratons

Hydro-geochemistry of groundwater and surface water in Dschang town(West Cameroon):Alkali and alkaline-earth elements ascertain lithological and anthropogenic constraints

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Journal of Groundwater Science and Engineering 2021年第3期9卷 212-224页

作者： Yemeli Elida Joelle Temgoua Emile Kengni Lucas Ambrosi jean-Paul Momo-nouazi Mathieu Silatsa-Tedou Francis brice Wamba Franck Robean Tchakam-Kamtchueng brice University of Dschang Department of Earth SciencesDschangCameroon. University of Dschang Faculty of Agronomy and Agricultural SciencesDschangCameroon. Aix Marseille University CNRSIRDINRAECollege de FranceCEREGEAix En ProvenceFrance. Institute of Geological and Mining Research YaoundeCameroon.

The study aims to identify a suitable site for open and bore well in a farmhouseusing ground magnetic survey in south *** also aims to define depth to granitoid and structural elements which traverse the selected *** data(n=84)measured,processed and interpreted as qualitative and *** results of total magnetic intensities indicate that the area is composed of linear magnetic lows trending NE-SW direction and circular to semi-circular causative *** magnetic values ranged from-137 nT to 2345 nT with a mean of 465 *** to equator shows significant shifting of causative bodies in the southern and northern *** signal map shows exact boundary of granitic *** directional filter has brought out structural element trending NE-SW *** of individual profile brought to light structurally weak zone between 90 m and 100 m in all the profile *** decrease of magnetic values from 2042 nT to 126 nT noticed in profile line 6 between 20 m and 30 m indicates fault *** breaks obtained from these maps were visualized,interpreted and identified two suitable sites for open and bore *** averaged power spectrum estimates depth of shallow and deep sources in 5 m and 50 m,*** method has also been applied to estimate depth of granitoid and structural elements using structural indexes 0,1,2,and 3 and found depth ranges from90 *** indicates magnetic method is one of the geophysical methods suitable for groundwater exploration and site selection for open and borewells.

关键词： Alkali/alkaline-earth elements Groundwater and surface water Geochemical anomaly Anthropogenic impact Dschang-Cameroon

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旋量理论及其在材料力学中的应用

力学与实践 2025年第6期46卷 1262-1270页

作者：黄行蓉李敏 LAINE jean-Pierre 北京航空航天大学中法工程师学院/国际通用工程学院北京 100191 北京航空航天大学航空科学与工程学院北京 100191

旋量理论是为力学量身定制的数学工具，在描绘刚体运动时表现出独特优势。基于材料力学中的平截面假设，构件的截面运动可分解为形心位移以及截面绕形心的旋转，从而可将截面运动视为刚体运动，故可采用旋量理论刻画构件截面的运动和受... 详细信息

旋量理论是为力学量身定制的数学工具，在描绘刚体运动时表现出独特优势。基于材料力学中的平截面假设，构件的截面运动可分解为形心位移以及截面绕形心的旋转，从而可将截面运动视为刚体运动，故可采用旋量理论刻画构件截面的运动和受力。该描述方式在数学形式上具有统一性，在物理现象上能对应实际受载和变形的一般性，可将力学问题转变成基于旋量运算法则求解的数学问题。本研究期望能为我国材料力学教学提供新视角和新思路。

关键词：旋量理论材料力学数学工具

Development of a Model for Assessing Vulnerability to Pollution of Groundwater in Fissured Aquifers: The Case of the Ehania Watershed (South-Eastern Côte d’Ivoire)

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Journal of Environmental Protection 2021年第1期12卷 1-12页

作者： Brou Dibi Arthur brice Konan-Waidhet Valérie Plagnes jean Biemi UFR Environment/jean Lorougnon Guedé University Daloa C&ocirc te d’Ivoire UMR METIS/Sorbonnes University Paris France UFR STRM/Felix Houphouet Boigny University Abidjan C&ocirc te d’Ivoire

The protection of aquifers is a major concern for the authorities, especially in areas where there are large agro-industrial exploitations. The objective of this study is to define a new method of aquifer protection based on the characteristics of the structures of aquifers. The intrinsic vulnerability mapping method, PaPRI was used. It is a variant of the PaPRIKa method applied in karstic environment which has been adapted for its application in basement environment. This method uses three factors, including aquifer protection (P), using the soil cover, the unsaturated zone and the thickness of the alteration layer, (R) for the rock type and (I) for infiltration which including slope and drainage density. PAPRI is a method based on the weighting of different factors. The results obtained show 4 classes that evolve from low vulnerability classes (5% of the study area) to high and very high vulnerability classes (58%) and average vulnerability classes (37%). The classes of high and very high vulnerability, which indicate the zones that are very exposed to pollution, are more present in the central-northern part of the study area, with a few appearances towards the south. These zones could be related to topography due to the often very high slopes observed in the area. One of the advantages of this new method lies in the characterization of the alterations that strongly influence the migration of pollutants towards the water tables according to their nature and their thickness.

关键词： Vulnerability to Pollution Groundwater PaPRI Fissured Aquifer Ehania Watershed Côte d’Ivoire