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ON ENERGY CONSERVATION BY TRIGONOMETRIC INTEGRATORS IN THE LINEAR CASE WITH APPLICATION TO WAVE EQUATIONS

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Journal of Computational Mathematics 2020年第5期38卷 705-714页

作者： Ludwig Gauckler Institut fur Mathematik Freie Universitat BerlinArnimallee 9D-14195 BerlinGermany

Trigonometric integrators for oscillatory linear Hamiltonian differential equations are *** a condition of Hairer&Lubich on the filter functions in the method,a modified energy is derived that is exactly preserved by trigonometric *** implies and extends a known result on all-time near-conservation of *** extension can be applied to linear wave equations.

关键词： Oscillatory Hamiltonian systems Trigonometric integrators Energy conservation Long-time behaviour Modified energy

Effect of Soil Water Repellency on Energy Partitioning Between Soil and Atmosphere:A Conceptual Approach

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Pedosphere 2014年第4期24卷 498-507页

作者： H.SCHONSKY A.PETERS G.WESSOLEK Department of Soil Conservation Institute of EcologyTechnical University of BerlinD-10587 Berlin(Germany)

Water repellency(WR) is a phenomenon known from many soils around the world and can occur in arid as well as in humid climates;few studies,however,have examined the effect of soil WR on the soil-plant-atmosphere energy *** aim of our study was to estimate the effects of soil WR on the calculated soil-atmosphere energy balance,using a solely model-based *** made out evapotranspiration to have the largest influence on the energy balance;therefore the effect of WR on actual evapotranspiration was *** achieve this we used climate data and measured soil hydraulic properties of a potentially water-repellent sandy soil from a site near berlin,Germany.A numerical 1D soil water balance model in which WR was incorporated in a straightforward way was applied,using the effective cross section *** were carried out with vegetated soil and bare *** simulation results showed a reduction in evapotranspiration of 30-300 mm year^(-1)(9%-76%) at different degrees of WR compared to completely wettable soil,depending on the severity degree of soil *** energy that is not being transported away by water vapor(i.e.,due to reduced evapotranspiration) had to be transformed into other parts of the energy balance and thus would influence the local climate.

关键词： climate effective cross section evapotranspiration soil-atmosphere energy balance soil hydraulic property water balance

Wettability　of　Monocrystalline　Silicon　Carbide　by　Molten　Metals　and　Binary　Metal－Silicon　Alloys

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Rare Metals 1995年第2期14卷 96-105页

作者：李建国 Technische Universitat berlin 德国

The wettability of monocrystalline silicon carbide by liquid metals (Au , Ge, Ag , Sn and Cu) and binarymetal-silicon (Ag-Si and Sn-Si) alloys was investigated between their melting points and 1430℃ with the ses-sile drop method in argon with an extremely low oxygen partial pressure. For Au and Ge on SiC, the contactangles exhibited a weak temperature dependence. Under the same experimental conditions, however, complexwetting behaviours were observed for Ag , Sn and Cu on SiC , which could be attributed to the chemical reactivi-ties between the metals and the *** experirnents were also performed for binary Ag-Si and Sn-Si alloys on the same SiC substratesunder the same experimental conditions. The obtained coiitact angle isotherms for the two binary alloy/SiC sys-tems were discussed and interpreted by using a statistical thermedynamics mixlel.

关键词： Wetting Liquid metals and alloys Silicon carbide Reactivityand adsorption

Euler-Lagrange/DEM simulation of wood gasification in a bubbling fluidized bed reactor

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Particuology 2009年第4期7卷 307-316页

作者： Michael Oevermann Stephan Gerber Frank Behrendt berlin Institute of Technology School of Process Sciences and EngineeringDepartment of Energy Engineering Fasanenstr.8910623 BerlinGermany

We present an Euler-Lagrange method for the simulation of wood gasification in a bubbling fluidized bed. The gas phase is modeled as a continuum using the 2D Navier-Stokes equations and the solid phase is modeled by a Discrete Element Method （DEM） using a soft-sphere approach for the particle collision dynamic. Turbulence is included via a Large-Eddy approach using the Smagorinsky sub-grid model. The model takes into account detailed gas phase chemistry, zero-dimensional modeling of the pyrolysis and gasification of each individual particle, particle shrinkage, and heat and mass transfer between the gas phase and the particulate phase. We investigate the influence of wood feeding rate and compare exhaust gas compositions and temperature results obtained with the model against experimental data of a laboratory scale bubbling fiuidized bed reactor.

关键词： Euler-Lagrange simulation Discrete element method (DEM) Dense fluidized bed Biomass gasification

Wettability and Thermodynamic Adhesion of Liquid Metals on Solid Uranium Dioxide

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Rare Metals 1990年第2期10卷 95-100页

作者： Li Jian’guo Wang Juan Institut fur Nichtmetallische Werkstoffe, Technische Universitat berlin, Englische Str. 20. D-1000berlin 12, FRG. Technische Universitat berlin 德国

Using the experimental results given in literatures about the contact angle, θ and the work of adhesion, W, for nonreactive liquid metal / solid UO_2 systems, the validity and feasibility of the different existing models for calculating W in the metal /ox- ide systems are discussed. It can be shown that the models assuming that only metal atom-oxygen ion interactions existing at the interfaces are unable to explain the experimental results for W. More reasonable model should take into account both metal atom-oxygen ion and metal atom-oxide metal cation interactions, the proportion of the latter is balanced by the stoichiometry of the oxide. By applying the model recently set up by the authors for binary alloy / oxide systems, one can use the experimental and calculated values of θ and W for various metal / UO_2 systems to predict the influence of metallic additions on the contact angle and the work of adhesion of a given metal / UO_2 system.

关键词： Wettability and Thermodynamic Adhesion of Liquid Metals on Solid Uranium Dioxide der

Biomarkers for hepatocellular carcinoma: What's new on the horizon?

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World Journal of Gastroenterology 2018年第35期24卷 3974-3979页

作者： Matthias Ocker Department of Translational Medicine Oncology Bayer AGBerlin 13353Germany CharitéUniversity Medicine berlin Berlin 10117Germany

Treatment of advanced hepatocellular carcinoma remains unsatisfying and so far only prognostic biomarkers like α-fetoprotein have been established. No clear predictive biomarker is currently available for standard of care therapies, including targeted therapies like sorafenib. Novel therapeutic options like immune checkpoint inhibitors may pose new challenges to identification and validation of such markers. Currently, PD-L1 expression via immunohistochemistry and tumor mutational burden via next-generation sequencing are explored as predictive biomarkers for these novel treatments. Limited tissue availability due to lack of biopsies still restricts the use of tissue based approaches. Novel methods exploring circulating or cell free nucleic acids(DNA, RNA or miRNAcontaining exosomes) could provide a new opportunity to establish predictive biomarkers. Epigenetic profiling and next-generation sequencing approaches from liquid biopsies are under development. Sample size, etiologic and geographical background need to be carefully addressed in such studies to achieve meaningful results that could be translated into clinical practice. Proteomics, metabolomics and molecular imaging are further emerging technologies.

关键词： Hepatocellular carcinoma Biomarker Nextgeneration sequencing Liquid Biopsy Functional imaging Molecular imaging Circulating free DNA Circulating tumor cells Immune checkpoint inhibitors

Importance of Metal－Oxide Support Wettingandinteractions on Understanding of Physical and Chemical Behaviours of Supported Metal Catalysts

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Rare Metals 1994年第3期13卷 179-187页

作者：李建国 Technische Universitat berlin 德国

It has been generally recognised that the metal catalysts supported on oxide ceramic and non-oxide ceramic supports exhibit completely different characteristics as compared with the homogeneous ones. The na-ture of bonding and interactions occurring at the metal / ceramic interfaces are believed to be of importancefor the characteristics of such catalysts. The recently developed microscopic theory of adhesion and wettingin metal/ ceramic systems is briefly presented here with the emphasis on the ionocovalent oxide *** its consequence on the understanding of the physical and chemical behaviours of supported metal cata-lysts is exploited.

关键词： Wetting and adhesion Metal-ceramic interaction Dissolved oxygen,Supported metal catalysts Physical and chemical behaviours

Impacts as Triggers for Weather-Related Decision Making: Observations at the berlin Fire Brigade Control and Dispatch Center

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International Journal of Disaster Risk Science 2021年第4期12卷 610-615页

作者： Thomas Kox Catharina Lüder Institute of Computer Science Freie Universität Berlin12165BerlinGermany Hans-Ertel-Center for Weather Research berlin 12165BerlinGermany Department of Geography Ludwig-Maximilians-Universität München80333MunichGermany

This article presents the results of a series of ethnographic observations at the berlin fire brigade control and dispatch center during routine and severe weather *** weather-related challenges of a fire brigade lie between the anticipation of events and their potential consequences,and the ad hoc reactions to actual impacts of *** results show that decisions and actions related to high impact weather are not necessarily motivated by weather warnings ***,they are reactions to the experience of impacts,for example,an increased number of missions or emergency *** are the main trigger for the decision *** is one additional external factor that influences the operational capability of a fire *** commanding officers in a fire brigade control and dispatch center experience weather primarily through technical equipment,verified by ground truth,observations showed that direct personal contact with the regional weather service and colleagues on the ground takes on a greater role in actual severe weather *** observations point to the need for increased interagency communication between the emergency services,the weather service,and other organizations to integrate weather information,impacts,and non-weather-related tasks into coherent weather-related decision making.

关键词： berlin Emergency services Fire brigades Impact-based emergency response Interagency communication Weather-related decision making

CAR-T overdrive:harnessing inosine for metabolic rewiring and stemness induction

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2347-2348页

作者： MartíFarrera-Sal Michael Schmueck-Henneresse berlin Institute of Health(BIH)at Charité—Universitatsmedizin berlin BIH Center for Regenerative Therapies(BCRT)Experimental ImmunotherapyAugustenburger Platz 1BerlinGermany

In a recent Cancer Cell publication,Klysz et *** the impact of inosine(INO),a catabolic product of adenosine(Ado),on Chimeric Antigen Receptor(CAR)T-cell function,stemness,and *** provided insights into T-cell exhaust... 详细信息

关键词： programming. CAR Ado