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Numerical Solution of 2-D Diffusion Problems Using Discrete Duality Finite Volume Method on General Boundary Conditions

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Journal of Applied Mathematics and Physics 2022年第6期10卷 1968-1997页

作者： Hubert Donfack aubin Kinfack Jeutsa Faculty of Science The University of Bamenda Bamenda Cameroon Higher Technical Teachers’ Training College The University of Buea Kumba Cameroon

In this paper, we present a discrete duality finite volume (DDFV) method for 2-D flow problems in nonhomogeneous anisotropic porous media under diverse boundary conditions. We use the discrete gradient defined in diamond cells to compute the fluxes. We focus on the case of Dirichlet, full Neumann and periodic boundary conditions. Taking into account the periodicity is the main new ingredient with respect to our recent works. We explain the procedures step by step, for numerical solutions. We develop a matlab code for algebraic equations. Numerical tests were provided to confirm our theoretical results.

关键词： Flow Problems Nonhomogeneous Anisotropic Media Finite Volumes Test Simulations

Bone blood stem cells

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Bone blood stem cells

Using microscopic video data measures for driver behavior analysis during adverse winter weather:opportunities and challenges

International Conference on Osteoporosis and Bone Research 2008

作者： Jane E.aubin Department of Molecular Genetics University of TorontoTorontoOntarioCanada

＜正＞The fact that bone formation takes place not only during dev- elopment but throughout life suggests that there is a large reservoir of cells in the body capable of *** nature of these cells over the lifetime of the animal,contributions from stem cell versus com- mitted progenitor pools,and identification of developmental tran-

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Journal of Modern Transportation 2015年第2期23卷 81-92页

作者： Ting Fu Sohail Zangenehpour Paul St-aubin Liping Fu Luis F.Miranda-Moreno Department of Civil Engineering and Applied Mechanics McGill University Department of Civil Geological and Mining Engineeringcole Polytechnique de MontréalC.P.6079succ.Centre-VilleMontrealQC H3C 3A7Canada Department of Civil and Environmental Engineering University of Waterloo School of Transportation and Logistics Southwest Jiaotong University

This paper presents a driver behavior analysis using microscopic video data measures including vehicle speed, lane-changing ratio, and time to collision. An analytical framework was developed to evaluate the effect of adverse winter weather conditions on highway driving behavior based on automated （computer） and manual methods. The research was conducted through two case studies. The first case study was conducted to evaluate the feasibility of applying an au- tomated approach to extracting driver behavior data based on 15 video recordings obtained in the winter 2013 at three dif- ferent locations on the Don Valley Parkway in Toronto, Canada. A comparison was made between the automated approach and manual approach, and issues in collecting data using the automated approach under winter conditions were identified. The second case study was based on high quality data collected in the winter 2014, at a location on Highway 25 in Montreal, Canada. The results demonstrate the effectiveness of the automated analytical framework in analyzing driver behavior, as well as evaluating the impact of adverse winter weather conditions on driver behavior. This approach could be applied to evaluate winter maintenance strategies and crash risk on highways during adverse winter weather conditions.

关键词： Winter Video data collection Issues Driver behavior Time to collision Winter roadmaintenance

插电式混合动力船舶的模拟分析及其航行性能研究

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插电式混合动力船舶的模拟分析及其航行性能研究

作者： MARAT TANGUY aubin 大连海事大学

学位级别：硕士

本文主要研究插电式混合动力船舶及其航行性能,这类船的主要能源是光伏系统和由电池和超级电容器组成的混合储能系统。本研究以玛莎女王一号”(Masha Queen I)油轮作为研究对象,在MATLAB/Simulink工作环境下开发了该船的能耗模型,利用... 详细信息

本文主要研究插电式混合动力船舶及其航行性能,这类船的主要能源是光伏系统和由电池和超级电容器组成的混合储能系统。本研究以玛莎女王一号”(Masha Queen I)油轮作为研究对象,在MATLAB/Simulink工作环境下开发了该船的能耗模型,利用其特性来模拟插电式混合动力推进系统,并以大连港到烟台港的过程作为航线分析其航行性能,来计算该航线下“玛莎女王一号”油轮所耗的燃料以及其二氧化碳排放量的问题。该船舶产生的二氧化碳排放量的能效设计指数(EEDI)的计算表明:“玛莎女王一号”所产生的二氧化碳排放量和所消耗的燃料都非常高,在这种情况下,插电式混合推进系统可以视为一种减少燃料消耗以及排放的解决方案本。文对这种复杂的插电式混合动力推进系统进行了模拟,所获得的结果表明,本研究开发的插电式混合动力推进系统的模型可以很好地响应本文中提出的各种目标,证明了将该船舶的推进系统变为插电式混合动力推进的系统是可行的。该模型能够预测船舶的性能;不仅包括螺旋桨模型,发动机模型,储能系统模型,光伏模型和电动机模型等多种子模型;而且考虑到了多种操作模式(启动,正常驾驶和强加速,制动,蓄电池/超级电容器的充放电)的机械和电气系统;模型中船舶的动态特性(加速度,速度)与现实情况非常接近。通过本文研究模型的结果,可令玛莎女王一号”轮的二氧化碳的排放量以及其燃料消耗显著降低。此外,本研究中所提出的管理系统能够对能源进行无需人工干预的高效管理。本文建立的模型显示出了MATLAB/Simulink软件的工具在模拟复杂的机电系统时的适用性。该系统提供了对船舶产生的排放物的有价值的预测,可用于对海洋环境的保护。最后,本文将存储系统(电池/超级电容器)模型化,通过存储足够的能量来辅助船舶推进,在节能方面提供了不少优势。

关键词：储能插电式混合动力 MATLAB/Simulink软件太阳电池板推进力

肉类产品的环境足迹：环境影响的评价方法和重要性

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肉类研究 2015年第2期29卷 10-14页

作者： Joёl aubin 黄亚宇孟庆翔法国农业科学研究院雷恩中心雷恩35042法国不详

肉类产品在整个农业环境影响中占有核心位置。它对土地资源利用、生物多样性、水资源利用和温室气体排放的总体影响都很突出。在农业产品,特别是类肉产品的环境影响评价中,应用生命周期评价方法,改变了人们对农业产品环境影响的认识,为... 详细信息

肉类产品在整个农业环境影响中占有核心位置。它对土地资源利用、生物多样性、水资源利用和温室气体排放的总体影响都很突出。在农业产品,特别是类肉产品的环境影响评价中,应用生命周期评价方法,改变了人们对农业产品环境影响的认识,为肉类生产体系的良性运行,提供了更为视角全面和多准则的评估方法。尽管畜牧生产过程对环境的影响问题已经有了广泛认识,但评价方法还有待标准化。为了更好地评价肉类产品消费的环境影响,还需要建立肉类产品生产链的通用评价方法和数据库。

关键词：生命周期评价水足迹气候变化土地利用

Self-medication of achalasia with cannabis, complicated by a cannabis use disorder

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World Journal of Gastroenterology 2015年第20期21卷 6381-6383页

作者： Amandine Luquiens Nelson Lourenco Amine Benyamina Henri-Jean aubin Hopital Paul Brousse-Addictologie 94804 Villejuif cedex France Service d'hepatogastroenterologie Hopital Saint Louisuniversite Denis Diderot Paris Ⅶ 75010 ParisFrance

Achalasia is a rare esophagus motility disorder. Medical, endoscopic and surgical treatments are available, but all endorse high relapse rates. No data has been published to date reporting a therapeutic effect of cannabis use neither in achalasia nor on its influence on manometric measurements. We report the case of a patient diagnosed with achalasia. He could benefit from a large panel of therapeutic interventions, but none of them was effective over the time. He first used cannabis at age 20 and identified benefits regarding achalasia symptoms. He maintained regular moderate cannabis use for 9 years, with minimal digestive inconvenience. A manometry performed without cannabis premedication was realized at age 26 and still found a cardiospasm. Cannabis use could explain the gap between functional symptoms assessment and manometry measurement. Further investigations are warranted to explore a therapeutic effect of cannabis in achalasia and possible influence on outcome measurements.

关键词： Achalasia Cannabis Treatment Manometry Addiction

Evaluation of the Blood Pressure Lowering-Effect of the Lactotripeptides Valine-Proline-Proline and Isoleucine-Proline-Proline in Non-Hypertensive Japanese Subjects through a Meta-Analysis of Randomized-Controlled Studies

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Food and Nutrition Sciences 2018年第10期9卷 1221-1253页

作者： Aurelie Chanson-Rolle Francois aubin Veronique Braesco Ryuji Takeda Yasuhiro Saito VAB-Nutrition Clermont-FerrandFrance Venn Life Sciences ParisFrance TES Holdings Co. Ltd.TokyoJapan

Several studies have reported the ability of the lactotripeptides valine-proline-proline (VPP) and isoleucine-proline-proline (IPP) to lower systolic blood pressure (SBP), including in Japanese populations. But the magnitude of the reported changes differs across trials. Conclusions from a previous meta-analysis in Japanese subjects suggest that this may be due at least partly to differences in subjects’ blood pressure (BP) status. Therefore, we decided to resume this analysis, focusing only on non-hypertensive subjects and including newly-published eligible studies, in order to further evaluate the SBP-lowering effect of VPP/IPP and study the influence of the ingested dose, type of ingredient (enzymatic or fermented) and food product (drink or supplement). The systematic search of four databases (including two in Japanese) allowed to identify 11 relevant randomized-controlled trials (581 subjects), which were included in the meta-analysis. Results reported a significant decrease in SBP following VPP/IPP intake in non-hypertensive Japanese individuals, with an estimated effect-size of -3.44 mm Hg (95% CI, -4.53 to -2.34, P < 0.0001) as compared to placebo. There was no indication of heterogeneity or publication bias. Furthermore, the type of food product and ingredient did not influence the SBP-lowering effect, which was significant and of same order of magnitude with either type of product and ingredient. Besides, the SBP-lowering effect remained significant when limiting to studies testing usual daily amounts of VPP/IPP (≤5 mg/d). This updated meta-analysis therefore confirms that VPP/IPP are effective in reducing SBP in non-hypertensive Japanese individuals, for amounts that may be ingested on a daily basis, and independently of the types of ingredient/food consumed. VPP/IPP-containing foods could therefore contribute to a better control of high-normal BP and/or to the maintenance of normal BP, and by such, may play a role in preventing high BP in individuals wit

关键词： Blood Pressure IPP VPP Japanese Meta-Analysis

Export Control Law and Regulations Handbook: A Practical Guide to Military and Dual-Use Goods, Trade Restrictions and Compliance. Global Trade and Finance Series, Volume 10.

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Macro-nutrients in edible parts of food crops in the region of Moanda,Gabon

丛书名： Global Trade and Finance

2007年

作者： aubin, Yann Idiart, Arnaud Wolters Kluwer Law & Business

Currently not available for this book.

ISBN: (数字)9781281908056

ISBN: (纸本)9789041126016

Currently not available for this book.

关键词： Export controls.

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Agricultural Sciences 2012年第5期3卷 697-701页

作者： Jean aubin Ondo Richard Menye Biyogo Magloire Ollui-Mboulou Fran?ois Eba Joseph Omva-Zue Laboratoire pluridisciplinaire des sciences de l’Ecole Normale Supérieure B.P 17009 Libreville Gabon

The assessment of nutritive foodstuffs quality is an important step in the estimation of dietary intake of metals. This study aimed to assess accumulation and the daily intake of macro-elements magnesium, calcium, potassium and sodium in edible parts of plants grown in Moanda area. The ranges of concentrations were 246 - 5645 mg/kg, 1167 - 35105 mg/kg, 158 - 12563 mg/kg and 88 - 795 mg/kg for Mg, Ca, K and Na, respectively. Mg and K levels were significantly higher in fruits than in tubers. The trend of accumulation in the edible parts of plants was generally: Ca > K > Mg > Na. The daily intakes of Mg and Ca were the highest and indicated food crops in Moanda had a good nutritive quality.

关键词： Food Crops Macro-Nutrients Daily Intake Moanda