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A comparative study of the sorption of O-PAHs and PAHs onto soils to understand their transport in soils and groundwater

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journal of Environmental Sciences 2023年第2期124卷 61-75页

作者： W.Almouallem j.michel S.Dorge C.joyeux G.Trouve D.Le Nouen French National Institute for Industrial and Environment and Risks Direction Sites&TerritoiresVerneuil en HalatteF-60550France University of Haute-Alsace Laboratoire Gestion des Risques et Environnement(LGRE)UR2334MulhouseFrance University of Strasbourg 67000 StrasbourgFrance University of Haute-Alsace Laboratoire d’Innovation Moléculaire et Applications(LIMA)UMR 7042 CNRSMulhouseFrance

Polycyclic aromatic hydrocarbons(PAHs)and their oxygenated derivates(O-PAHs)are identified in soils and groundwater of industrialized sites and contribute to the risk for Humans and the ***,data are scarce in literature concerning their retention and transfer in soils and no soil-water partition coefficients are available for these *** of two PAHs,fluorene and acenaphthene and two O-PAHs,9H-fluorenone and dibenzofuran onto two soils with different organic carbon contents was evaluated and compared by determining their sorption *** of ionic strength and liquid to solid ratio,on fluorene and fluorenone sorption was also *** equilibrium is achieved within less than 24 hr of mixing and linear sorption models best fit the isotherm *** and dibenzofuran are similarly sorbed onto the *** of fluorene is higher than the one of fluorenone,showing a smaller affinity of fluorenone towards the solid *** means that O-PAH could form larger contamination plumes in groundwater than *** the L/S ratio from 100 to 50 and 30,increases the sorption of fluorenone onto the soil by 56% and 67%respectively,while the sorption of fluorene is slightly *** the ionic strength of the aqueous phase also modifies the sorption of fluorenone,contrary to the sorption of fluorene which is slightly affected.

关键词： PAHs O-PAHs Contaminated soils Groundwater Sorption Kinetics Isotherms

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关于眩晕病因的探索(耳前庭正常)

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昆明医科大学学报 1981年第S1期 94-95页

作者： j.michel 李枢

1968—1976年,我们对耳部无创伤的1550眩晕病例进行了统计,其中耳前庭正常者700人,占总数的45％,按眩晕的不同情况分为七组。第一组:精神性眩晕(占1/3)此组人数最多,又可分为二型:1)抑郁型:此型占多数。眩晕可能是严重精神病(恐怖症,或... 详细信息

1968—1976年,我们对耳部无创伤的1550眩晕病例进行了统计,其中耳前庭正常者700人,占总数的45％,按眩晕的不同情况分为七组。第一组:精神性眩晕(占1/3)此组人数最多,又可分为二型:1)抑郁型:此型占多数。眩晕可能是严重精神病(恐怖症,或精神病科医生所谓的癔病)或抑郁状态初期的第一个症状。此病表现在心理上极度紧张忧虑,有必要思考以下两点:①在病的初期,有希望及时阻止其进展。②此病的诊断可能特别困难。病人的表现不是假性眩

关键词：头痛头疼疼痛耳前庭

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Human Eosinophil Cell Manipulation by Optical Tweezers

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Open journal of Biophysics 2024年第3期14卷 330-338页

作者： Pavel Yale jean michel Edoukoua Konin Abadê Ange-Boris N’guessan michel Abaka Kouacou jérémie T. Zoueu Laboratoire dInstrumentation Image et Spectroscopie (L2IS) Institut National Polytechnique Houphout-Boigny (INPHB) Yamoussoukro Cte dIvoire Laboratoire de Chimie et de Physique Appliques Sciences et Techniques Universit Alassane Ouattara Bouak Cte dIvoire

In this work, lateral deformation of human eosinophil cell during the lateral indentation by an optically trapped microbead of diameter 4.5 µm is studied. The images were captured using a CCD camera and the Boltzmann statistics method was used for force calibration. Using the Hertz model, we calculated and compared the elastic moduli resulting from the lateral force, showing that the differences are important and the force should be considered. Besides the lateral component, the setup also allows us to examine the lateral cell-bead interaction. The mean values of the properties obtained, in particular the elastic stiffness and the shear stiffness, were Eh = (37.76 ± 2.85) µN/m and Gh = (12.57 ± 0.32) µN/m. These results show that the lateral indentation can therefore be used as a routine method for cell study, because it enabled us to manipulate the cell without contact with the laser.

关键词： Optical Tweezers Human Eosinophil Cell Indentation Shear Stiffness

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Cellular Auxin Homeostasis： Gatekeeping Is Housekeeping

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Molecular Plant 2012年第4期5卷 772-786页

作者： michel Ruiz Rosquete Department of Applied Genetics and Cell Biology University of Applied Life Sciences and Natural Resources (BOKU) 1190 Vienna Austria Department of Plant Systems Biology VIB and Department of Plant Biotechnology and Bioinformatics Ghent University 9052 Gent Belgium

The phytohormone auxin is essential for plant development and contributes to nearly every aspect of the plant life cycle. The spatio-temporal distribution of auxin depends on a complex interplay between auxin metabolism and cell-to-cell auxin transport. Auxin metabolism and transport are both crucial for plant development; however, it largely remains to be seen how these processes are integrated to ensure defined cellular auxin levels or even gradients within tissues or organs. In this review, we provide a glance at very diverse topics of auxin biology, such as biosynthesis, conjugation, oxidation, and transport of auxin. This broad, but certainly superficial, overview highlights the mutual importance of auxin metabolism and transport. Moreover, it allows pinpointing how auxin metabolism and transport get integrated to jointly regulate cellular auxin homeostasis. Even though these processes have been so far only separately studied, we assume that the phytohormonal crosstalk integrates and coordinates auxin metabolism and transport. Besides the integrative power of the global hormone signaling, we additionally introduce the hypothetical concept considering auxin transport components as gatekeepers for auxin responses.

关键词： auxin conjugation auxin homeostasis auxin metabolism auxin transport.

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Magnetron co-sputtering synthesis and nanoindentation studies of nanocrystalline(TiZrHf)_(x)(NbTa)_(1–x)high-entropy alloy thin films

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Nano Research 2022年第6期15卷 4873-4879页

作者： Changjun Cheng Xiaofu Zhang michel j.R.Haché Yu Zou Department of Materials Science and Engineering University of TorontoTorontoOntario M5S 3E4Canada State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology and Center for Excellence in Superconducting ElectronicsChinese Academy of Sciences(CAS)Shanghai 200050China

Refractory high-entropy alloys(HEAs)possess many useful properties such as high strength and high-temperature *** far,most studies on refractory HEAs have been limited to a few well-known compositions and on their coarse-grain bulk *** we fabricate nanocrystalline(TiZrHf)_(x)(NbTa)_(1−x)HEA thin films with a large range of compositions(x=0.07–0.90)by the direct current(DC)magnetron co-sputtering technique and measure their mechanical properties using the nanoindentation *** the as-deposited HEA thin films show a solid-solution body-centered cubic(bcc)*** the compositional ratio(x)increases,the elastic modulus decreases from 153 to 123 GPa,following the trend of the rule of *** x increases,the hardness first decreases from 6.5 GPa(x=0.07)to the lowest value(4.6 GPa,x=0.48)and then increases to the highest value(7.1 GPa,x=0.90),showing a concave *** change in hardness might be attributed to the combinational influence caused by the atomic size and modulus effects,as well as the texture *** authors also propose a few open questions for future studies on this and related HEA systems.

关键词： high-entropy alloys nanocrystalline alloys refractory metals thin films magnetron co-sputtering nanoindentation

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Experimental investigations of transient pressure variations in a high head model Francis turbine during start-up and shutdown

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journal of Hydrodynamics 2014年第2期26卷 277-290页

作者： TRIVEDI Chirag CERVANTES michel j. GANDHI B.K. OLE DAHLHAUG G. Division of Fluid and Experimental Mechanics Department of Engineering Sciences and Mathematics Lule? University of Technology Department of Mechanical and Industrial Engineering Indian Institute of Technology Water Power Laboratory Department of Energy and Process Engineering Norwegian University of Science and Technology

Penetration of the power generated using wind and solar energy to electrical grid network causing several incidents of the grid tripping, power outage, and frequency drooping. This has increased restart （star-stop） cycles of the hydroelectric turbines significantly since grid connected hydroelectric turbines are widely used to manage critical conditions of the grid. Each cycle induces significant stresses due to unsteady pressure loading on the runner blades. The presented work investigates the pressure loading to a high head （ He = 377 m, De = 1.78 m） Francis turbine during start-stop. The measurements were carried out on a scaled model turbine （HM = 12.5 m, DM = 0.349 m）. Total four operating points were considered. At each operating point, three schemes of guide vanes opening and three schemes of guide vanes closing were investigated. The results show that total head variation is up to 9% during start-stop of the turbine. On the runner blade, the maximum pressure amplitudes are about 14 kPa and 16 kPa from the instantaneous mean value of 121 kPa during rapid start-up and shutdown, respectively, which are about 1.5 times larger than that of the slow start-up and shutdown. Moreover, the maximum pressure fluctuations are given at the blade trailing edge.

关键词： Francis turbine pressure fluctuations start-up shutdown transient

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Enhanced Userspace and In-Kernel Trace Filtering for Production Systems

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journal of Computer Science & Technology 2016年第6期31卷 1161-1178页

作者： Suchakrapani Datt Sharma michel Dagenais Department of Computer and Software Engineering Ecole Polytechnique de Montrdal Montreal H3T 1J4 Canada

Trace tools like LTTng have a very low impact on the traced software as compared with traditional debuggers. However, for long runs, in resource constrained and high throughput environments, such as embedded network switching nodes and production servers, the collective tracing impact on the target software adds up considerably. The overhead is not just in terms of execution time but also in terms of the huge amount of data to be stored, processed and analyzed offiine. This paper presents a novel way of dealing with such huge trace data generation by introducing a just-In-Time （jIT） filter based tracing system, for sieving through the flood of high frequency events, and recording only those that are relevant, when a specific condition is met. With a tiny filtering cost, the user can filter out most events and focus only on the events of interest. We show that in certain scenarios, the jIT compiled filters prove to be three times more effective than similar interpreted filters. We also show that with the increasing number of filter predicates and context variables, the benefits of jIT compilation increase with some jIT compiled filters being even three times faster than their interpreted counterparts. We further present a new architecture, using our filtering system, which can enable co-operative tracing between kernel and process tracing VMs （virtual machines） that share data efficiently. We demonstrate its use through a tracing scenario where the user can dynamically specify syscall latency through the userspace tracing VM whose effect is reflected in tracing decisions made by the kernel tracing VM. We compare the data access performance on our shared memory system and show an almost 100 times improvement over traditional data sharing for co-operative tracing.

关键词： tracing debugging filtering operating system interpreter

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Autoregressive neural networks with exogenous variables for indoor temperature prediction in buildings

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Building Simulation 2021年第1期14卷 165-178页

作者： Benoit Delcroix jérôme Le Ny michel Bernier Muhammad Azam Bingrui Qu jean-Simon Venne Department of Mechanical Engineering Polytechnique Montréal2500 Chemin de PolytechniqueMontréalQCH3T 1J4Canada Department of Electrical Engineering and GERAD Polytechnique Montréal2500 Chemin de PolytechniqueMontréalQCH3T 1J4Canada Smart Building Lab BrainBox AIMontréalQCCanada

Thermal models of buildings are helpful to forecast their energy use and to enhance the control of their mechanical ***,these models are building-specific and require a tedious,error-prone and time-consuming development effort relying on skilled building energy *** to white-box and gray-box models,data-driven(black-box)models require less development time and a minimal amount of information about the building *** this paper,autoregressive neural network models are compared to gray-box and black-box linear models to simulate indoor *** models are trained,validated and compared to actual experimental data obtained for an existing commercial building in Montreal(QC,Canada)equipped with roof top units for air *** show that neural networks mimic more accurately the thermal behavior of the building when limited information is available,compared to gray-box and black-box linear *** gray-box model does not perform adequately due to its under-parameterized nature,while the linear models cannot capture non-linear phenomena such as radiative heat transfer and ***,the neural network models outperform the alternative models in the presented application,reaching a coefficient of determination R2 up to 0.824 and a root mean square error down to 1.11℃,including the error propagation over time for a 1-week period with a 5-minute *** considering a 50-hour time horizon,the best neural networks reach a much lower root mean square error of around 0.6℃,which is suitable for applications such as model predictive control.

关键词： thermal model building simulation experimental validation multi-layer perceptron linear vs.non-linear black-box vs.gray-box

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Resolution of phylogenetic relationships of the major subfamilies of the Delphacidae （Homoptera： Fulgoroidea） using the mitochondrial ribosomal DNA

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Insect Science 2006年第3期13卷 167-177页

作者： EDDY DIjKSTRA michel A. SLOTMAN RORY j. POST Biosystematics Group Wageningen University the Netherlands The Natural History Museum London UK

Delphacid relationships from the genus level to the subfamily have been completely resolved （among those taxa examined） using sequence data from the 3＇ end of the 12S gene. Monophyly of the non-asiracine subfamilies was strongly supported and the asiracine Ugyops was placed in the most basal position of the tree. Support levels for monophyly of the Delphacini increased after weighting transversions more heavily than transitions and after removing the cixiid outgroup from the dataset. Among the Delphacini, Conomelus and Megamelus were more closely related to each other than either was to Chloriona. These results are in agreement with the tree based on morphological characters. However, in contrast to morphological data our results strongly supported a sister group relationship between the Stenocraninae and the Kelisiinae. Although the 12S gene fragment gave some information about the species relationships within Chloriona, neither this fragment nor the 5＇ end of the 16S gene appear to be very useful for this level. Molecular evolutionary patterns provided evidence that there has been a shift in base composition from T to A during the early evolution of the non-Asiracinae. The non-Asiracinae also had comparatively fast substitution rates and these two observations are possibly correlated. In the ‘ modem＇ delphacid Chloriona, the AT content was comparatively low in regions free of constraints but this was not the case for ‘ non-modem＇ delphacids. The tRNA for valine has been translocated elsewhere, probably before the Delphacidae and Cixiidae diverged from each other.

关键词： classification Delphacidae evolution Fulgoroidea Homoptera rnitochondrial DNA phylogeny ribosomal DNA

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On the Equation n1n2= n3n4 Restricted to Factor Closed Sets

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Acta Mathematica Sinica,English Series 2018年第10期34卷 1517-1530页

作者： San Ying SHI michel WEBER School of Mathematics Hefei University of Technology Hefei 230009 P. R. China IRMA UMR 7501 7 rue Rend Descartes 67084 Strasbourg Cedex France

We study the number of solutions N（B,F） of the diophantine equation n1n2 = n3n4,where 1 ≤ n1≤B, 1≤ n3 ≤B, n2, n4 ∈ F and F C [1, B] is a factor closed set. We study more particularly the case when F = {m = p1^... 详细信息

关键词： Diophantine equation arithmetical functions factor closed set

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