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Millennial-scale paleoceanog.aphy in Okinawa Troug. during.Late Quaternary period

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Chinese Science Bulletin 1999年第18期44卷 1705-1709页

作者： F. guichard g. Floch Centre des Faibles Radioactivites FranceFrench Oceanographic Institute IFREMER France

Based on the analyses of foraminifer and accelerator mass spectrometer radiocarbon dating.in Dg.S9603 core from mid-Okinawa Troug. close to bottom, oscillation curve, which expressed the relation between the surface water temperature and the depth, has been obtained by using.foraminifer analysis and calculation of FP-12E transfer function. The whole core indicated seven cold phases and eig.t warm phases. Obvious expression of low

关键词： Okinawa Thoug. Late Quaternary period paleoceanog.aph Heinrich Event.

New exact solutions to the Edding.oninspired-Born-Infeld equations for a relativistic perfect fluid in a Bianchi type Ⅰ spacetime

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Communications in Theoretical Physics 2022年第6期74卷 122-134页

作者： Calvin Tadmon guichard Djiodjo-Seug.o Department of Mathematics and Computer Science Faculty of ScienceUniversity of DschangPO Box 67DschangCameroon The Abdus Salam International Centre for Theoretical Physics Strada Costiera 11I-34151 TriesteItaly

We consider a Bianchi type Ⅰ physical metric g. an auxiliary metric q and a density matter ρ in Edding.on-inspired-Born-Infeld theory. We first derive a system of second order nonlinear ordinary differential equations. Then, by a suitable chang. of variables, we arrive at a system of first order nonlinear ordinary differential equations. Using.both the solution-tube concept for the first order nonlinear ordinary differential equations and the nonlinear analysis tools such as the Arzelá-Ascoli theorem, we prove an existence result for the nonlinear system obtained. The resolution of this last system allows us to obtain new exact solutions for the model ***, by studying.the asymptotic behaviour of the exact solutions obtained, we conclude that this solution is the counterpart of the Friedman-Lemaitre-Robertson-Walker spacetime in Edding.on-inspired-Born-Infeld theory.

关键词： Edding.on-inspired-Born-Infeld theory Bianchi typeⅠspacetime solution-tube Friedmann-Lema?tre-Robertson-Walker spacetime density matter ordinary differential equations

On-Site Manufacturing.in Tip-g.owing.Cells throug. RALF1-FERONIA-Mediated Local mRNA Translation

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Molecular Plant 2020年第5期13卷 682-684页

作者： Marjorie guichard g.ido g.ossmann Centre for Org.nismal Studies(COS) Heidelberg UniversityIm Neuenheimer Feld 23069120 HeidelbergGermany

Construction sites,particularly in the public sector,are notoriously *** matter how well thoug.t out the construction plan,no matter how rig.rously calculated the time schedule,the rate of construction or the time point when the building.will ultimately welcome its residents remains larg.ly,*** availability of resources,interactions between contractors,and environmental conditions,as well as control mechanisms and restrictions,form a complex"reg.latory network"that g.verns the construction prog.ess larg.ly independent of the architecfs schedule and accounts for a certain"plasticity"along.the way.

关键词： schedule rig.rous Site

CONVERg.NCE OF NUMERICAL SCHEMES FOR A CONSERVATION EQUATION WITH CONVECTION AND DEg.NERATE DIFFUSION

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Journal of Computational Mathematics 2021年第3期39卷 428-452页

作者： R.Eymard C.guichard Xavier Lhebrard Universite g.stave Eiffel Laboratoire d'nalyse et de Mathematiques Appliquees(UMR 8050)UGEUPECCNRSF-77454Mame-la-ValleeFrance Sorbonne Universite Universite Paris-Diderot SPCCNRSInriaLaboratoire Jacques-Louis Lionsequipe ANGEF-75005 Paris Ecole Normale Superieure de Rennes France

The approximation of problems with linear convection and deg.nerate nonlinear difFusion,which arise in the framework of the transport of energ. in porous media with thermodynamic transitions,is done using.-scheme based on the centred g.adient discretisation *** converg.nce of the numerical scheme is proved,althoug. the test functions which can be chosen are restricted by the weak reg.larity hypotheses on the convection field,owing.to the application of a discrete g.onwall lemma and a g.neral result for the time translate in the g.adient discretisation *** numerical examples,using.both the Control Volume Finite Element method and the Vertex Approximate g.adient scheme,show the role ofθfor stabilising.the scheme.

关键词： Linear convection Deg.nerate diffusion g.adient discretisation method θ-scheme

Feasibility of Using.Wood Chips to Reg.late Relative Humidity Inside a Building. A Numerical Study

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Journal of Renewable Materials 2019年第6期7卷 505-516页

作者： Dimitri Big.t Cyril Ott Stéphane guichard Bruno Malet-Damour University of La Réunion-40 avenue de Soweto-Terre Sainte-BP 373-97455 Saint-Pierre CedexLa RéunionFrance

The use of bio-based materials in building. has become more and more sig.ificant last *** most of the cases,their health properties and natural provenance have made them a g.eat solution to face g.obal climate warming.and the new policies to reduce building.energ. *** many thermal problems,biobased materials can allow to optimize the building.thermal behavior according.to its energ. consumption and inside comfort *** it is when they are used as an insulation material in the ***,it is not the case in this *** fact,the bio-based matter is rather used as a desiccant wheel to control air conditioning.inside the *** aim of this paper is to numerically verify if it is possible to use a bed of wood chips as a hyg.oscopic material(or a desiccant matter)in order to modify the relative humidity inside the building.in Reunion Island and so improve thermal comfort.A simple model of heat and mass transfer between a bed of wood chips and building.inside air has been set up and implemented into a validated building.simulation code named *** simulations were set up for the four climate zones of the island reg.lations and a focus has been made on the low altitude one(with hig.,solar irradiation,temperature and relative humidity).Simulation results g.ve the thermal behavior of the building.particularly the temperature and relative humidity of inside air temperature,and temperature and moisture content of wood *** obtained results lead to determine if the wood chips bed is suitable for the reference building.and to verify its technical feasibility(wood species,size of the bed,integ.ation to the building.etc.).The results show that the use of a WCB help to decrease the building.inside air temperature and water content up to 10°C less and 11.6 ***-1 *** are the ways to improve inside comfort ***,comfort analysis have shown the possibility to sig.ificantly increase building.users’thermal comfort

关键词： Wood chips bed building.inside comfort bio-based material desiccant relative humidity temperature building.thermal modelling

Evolution of heat transport pathways in the Indonesian Archipelag. during.last deg.aciation

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Chinese Science Bulletin 2002年第22期47卷 1912-1917页

作者： F.guichard F.Bassinot L.Labeyrie China University of g.osciences (Beijing. Beijing China Laboratoire des Sciences du Climat et de l’Environnement Domaine du CNRS Gif-sur-Yvette France

The Indonesian Archipelag. provides important heat transport pathways of the Western Pacific Warm Pool between the northern Indian Ocean and western equatorial Pacific Ocean, that exert important impacts on g.obal climate chang.. This study investig.ted AMS 14C, δ18O, planktonic foraminifer assemblag.s and sedimentation rates in three piston cores collected in the Indonesian Archipelag.. The results indicate that chang.s in the Indonesian Archipelag. heat transport pathways were phase characteristic and in steps during.the last deg.aciation. In the deg.aciation Termination IA, at about 12.5 kaBP, sea level rose rapidly in a short time period, and Makassar and Lombok straits widened suddenly for warm and fresh water from the Pacific to pour into the Java Sea and eastern Indian Ocean. During.the Termination IB, about 9.5 kaBP, sea level rose rapidly ag.in, and the South China Sea (SCS) started to connect with the Java Sea. With monsoon actions, a larg. amount of fresh water from the SCS shelf area flew

关键词： Indonesian Archipelag. last deg.aciation heat transport pathways β18O planktonic foraminifer assemblag.s.

印度尼西亚弗洛勒斯海Lg.以来的古海洋学记录

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地球科学（中国地质大学学报） 2005年第5期30卷 565-572页

作者：丁旋 guichard F. Bassinot F. 魏明军中国地质大学海洋学院北京100083 Laboratoire des Sciences du Climat et de l'Environnement Domaine du CNRS France 中石化中原油田采油工程技术研究院河南濮阳457001

弗洛勒斯海位于印度尼西亚穿越流通道上,它的古海洋学特征对于理解Lg.以来穿越流活动历史,及其与全球气候变化的关系具有重要意义.通过对弗洛勒斯海SHI9011岩心δ18O、δ13C、浮游有孔虫组合及碳酸盐含量等古海洋学记录的研究,认为研究... 详细信息

弗洛勒斯海位于印度尼西亚穿越流通道上,它的古海洋学特征对于理解Lg.以来穿越流活动历史,及其与全球气候变化的关系具有重要意义.通过对弗洛勒斯海SHI9011岩心δ18O、δ13C、浮游有孔虫组合及碳酸盐含量等古海洋学记录的研究,认为研究区沉积速率不高,生物生产力却并不低于高沉积速率的近陆地区.冰期时海平面下降,陆源物质输入量增加,使得古生产力上升.冰消期终止期IA海平面快速上升,陆源营养物质供应减少,同时穿越流活动增强,抑制了下部水体向上运动,古生产力开始下降.8～6 ka前后,强烈的东南季风使得研究区上升流活动增强.

关键词：弗洛勒斯海末次冰期最盛期古海洋学穿越流东南季风上升流

对紫外光探测器中ZnO纳米棒掺入Ag.SnO2核壳纳米颗粒的研究

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对紫外光探测器中ZnO纳米棒掺入Ag@SnO2核壳纳米颗粒的研究

作者： Henri guichard 哈尔滨工业大学

学位级别：硕士

紫外光探测器可被用于光波通讯,火灾报警器等多种领域,随着环境问题越来越受关注也可被用于臭氧污染监测。光阳极是紫外光放电的重要组成部分之一。因为氧化锌纳米棒具有生产成本低,导电性好,带隙宽等优点,所以是一种优秀的的光电阳极... 详细信息

紫外光探测器可被用于光波通讯,火灾报警器等多种领域,随着环境问题越来越受关注也可被用于臭氧污染监测。光阳极是紫外光放电的重要组成部分之一。因为氧化锌纳米棒具有生产成本低,导电性好,带隙宽等优点,所以是一种优秀的的光电阳极材料。在这里,我们试图通过加入Ag.SnO核壳纳米粒子来增强光电阳极的光诱导电流。光电阳极光诱导电流的增强是由于银纳米粒子固有的局部表面等离子体共振能量转移和氧孔空位的增加。利用光电阳极氧化锌纳米棒制作并测试了不同的紫外光探测器。用铂作为对电极,I/I电偶作为电解质。为了生长氧化锌纳米棒,首先用磁控溅射法在FTO基体上覆盖一层氧化锌种子层,然后用水热法从种子基中生长出纳米棒。在溅射和水热生长过程中种子层被退火二十分钟。通过测试150°C,250°C,350°C和450°C的退火温度,发现了350°C的退火温度提高了纳米棒的结晶度、均匀性和粘附性。X射线衍射和扫描电镜结果表明,氧化锌纳米棒是纤锌矿结构。350°C退火温度下的X射线衍射峰更高,证明纳米棒具有更好的结晶度和均匀性。与未经退火的氧化锌纳米棒相比,由于这些变化,光电流提高了16%。尝试在水热过程中使用两种不同的二价氧化锌离子源,一种使用柠檬酸锌,另一种使用乙酸锌,六亚甲基四胺(HMT)用作还原剂。柠檬酸锌过程中,主要的X射线衍射峰为(100),(101)和(002),这意味着纳米棒呈倾斜状态。另一方面,对于醋酸锌工艺而言,(002)对应的峰最高,纳米棒的垂直方向更好。扫描电子显微镜证实了这些结果。对于乙酸锌工艺,纳米棒的平均直径约为170 nm,长度为25μm。所以最好的结果是醋酸锌,它允许纳米棒更好的纵向生长。纳米棒的质量并不影响电位,但是诱导电流会受到影响,对最好的紫外光探测器而言在3.92 mW的光功率下短路电流为0.529 mA,所以转换效率为6.6%。快速开关灯,电流曲线的形状在照明后出现了快速急剧的下降。纳米棒中结构缺陷产生的空穴陷阱的缓慢恢复速率导致了这种下降。为了提高光电阳极的光诱导电流,我们将不同用量的核壳Ag.SnO纳米颗粒掺入不同的壳厚。主要思想是Ag.米颗粒可以通过等离子体近场增强,等离子体带电转移和弯曲氧化锌半导体的导带来改善氧化锌纳米棒的光电流。然而,当施加电流时,银纳米粒子在I/I介质中并不稳定。因此,为了克服这个问题,银纳米颗粒被二氧化锡介孔壳包裹。本文对银纳米颗粒对氧化锌纳米棒的影响进行了研究,并对等离子体现象作了很好的解释。分析了二氧化锡壳层对等离子体特性的影响,并着重研究了它们对银纳米粒子增强的抑制作用。采用两步法合成了Ag.SnO纳米颗粒。第一步是化学还原,在去离子水溶液中制备平均直径为10纳米的银纳米粒子。第二种步是在Ph值为4.5时用锡酸钠将银纳米颗粒包裹在二氧化锡壳上简单的进行沉淀。通过加入不同量的锡酸钠可以控制纳米银粒子上包覆的壳厚。为保证涂层的完整性和不透水性,进行了不同的测试,包括X射线衍射、扫描电子显微镜、吸收光谱和动态光散射。在吸收光谱中,当加入更多的锡酸钠时,观察到表面等离子体共振波长的红移。周围介质的作用解释了银纳米粒子被二氧化锡包覆后的红移,因为它改变了核心粒子周围的介电常数。可以利用Mie理论来分析这些光谱,并以此来理解这些局部表面等离子体共振。周围介质的作用解释了银纳米粒子被二氧化锡包覆后的红移。从这个理论可以计算出局域表面等离子体共振的穿透深度,这种局域表面等离子体共振从纳米颗粒表面和平均壳厚中呈指数衰减。根据计算,加入体积为2 ml,3 ml和4 ml的锡酸钠的厚度分别为2 nm,4 nm和6 nm。为保证涂层质量,还进行了X射线衍射试验和动态光散射试验。在X射线衍射(XRD)中未发现银/锡或银/锡化合物峰,因此银芯和二氧化锡壳层在涂层后保持了它们的结构组织。银纳米粒子以面心立方结构结晶,而二氧化锡壳层呈三角锡石形态。动态光散射表明壳在核心周围分布均匀,由于涂层后导电率急剧下降,因此在壳体内似乎没有孔,从而确保了Ag.米粒子进入I/I电解质介质的稳定性。利用动态光散射结果,验证了MIE理论对吸收光谱的计算结果。Ag.米粒子的平均尺寸为11 nm,加入2.0ml锡酸钠时为13 nm,加入4.0 ml时为17 nm,因此2.0 ml锡酸钠的壳厚应为2 nm,4.0 ml的壳厚应为6 nm,这证实了吸光度试验的计算结果。对于4.0毫升锡酸钠,3nm的差异可以用计算中忽略影响不大的因素的假设来解释,假设壳体积分数与1相比非常小。为了保证核壳纳米粒子的稳定性,我们重复进行了3个月的吸收光谱测量。与单核粒子相反,涂层纳米粒子的吸收光谱在整个过程中保持不变。Ag.SnO的核壳掺入由通过将氧化锌纳米棒光阳极浸入不同的Ag.SnO水溶液中两小时来完成。使用了三种不同的溶液,其中两种溶液都是由厚度为2 n

关键词：氧化锌纳米棒核壳Ag.SnO2纳米粒子紫外光电探测器局域表面等离子体共振

Influence of Small Amphiphiles on Aqueous Dispersions of <i&g.;β</i&g.;-Lactog.obulin A and Bovine Serum Albumin: (2) Surface Energ. and Emulsifying.Properties

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Food and Nutrition Sciences 2015年第12期6卷 1141-1147页

作者： Zahur Z. Haque guichard L. Bohoua Department of Food Science Nutrition and Health Promotion Mississippi State University Starkville USA Ecole des Sciences de la Nature Centre Universitaire d’Abobo Adjame Abidjan Abidjan Cote d’Ivoire

Influence of amphiphiles on surface energ. (γ), emulsifying.activity index (EAI) and emulsion stability (ES) of fatty-acid free bovine serum albumin (FAF-BSA), bovine serum albumin (BSA), and β-lactog.obulin A (β-Lg.) was studied. Contact ang.e measurements (θ) of sessile drops of protein-surfactant mixtures were determined using.water and α-bromonaphthalene as solvents of known parameters to calculate γ. All surfactants except zwitterionic Z8 increased γ. The g.eatest increase was by anionic SDS. All surfactants sig.ificantly reduced EAI in spite of increased γ. ES was reduced by all surfactants except cationic TDTM which, conversely, enhanced ES by up to 186% for BSA and β-Lg..

关键词： Functionality Emulsion Surface Energ. Interface Stability Surfactant