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Fuzzy topological relations between fuzzy spatial objects

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测绘科学 2006年第S1期31卷 64-68页

作者：唐新明 wolfgang Kainz 中国测绘科学研究院地理空间信息工程国家测绘局重点实验室 Cartography and Geoinformation Department of Geography and Regional Research University of Vienna Universit tsstrasse 7A-1010 ViennaAustria

Fuzziness is an internal property of spatial *** to model fuzziness of a spatial object is a main task of next generation *** paper proposes basic fuzzy spatial object types based on fuzzy *** object types are the natural extension of current nonfuzzy spatial object types.A fuzzy cell complex structure is defined for modeling fuzzy regions,lines and ***,fuzzy topological relations between these fuzzy spatial objects are formalized based on the 9intersection *** model can be implemented for GIS applications due to its scientific theory basis.

关键词： GIS fuzzy topological relations fuzzy spatial objects

Assessing stress conditions and impact velocities in fluidized bed opposed jet mills

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Particuology 2020年第6期18卷 12-22页

作者： Alexander Strobel Benedikt Koninger Stefan Romeis Florian Schott Karl-Ernst Wirth wolfgang Peukert Institute of Particle Technology(LFG) Friedrich-Alexander-Universitat Erlangen-NiirnbergCauerstrae 491058 ErlangenGermany

Fluidized bed opposed jet mills are capable of meeting the continuously growing dema nd for contamination-free fine *** this type of jet mill,the solid material is entrained and accelerated by expanding gas jets that are focused onto a focal point in side a fluidized *** resulting particle collisions induce *** process is affected by the relative particle velocities and the number of particle-particle ***,both quantities are ***,to date,neither relative particle velocities nor collision frequencies in such units have been *** present work introduces an innovative method to assess the stressing conditions in jet mills *** this end,mixtures of glass and ductile metal microspheres were used,with the latter employed in small ***-particle collisions between the aluminum and glass spheres lead to the formation of dents on the *** size and number of these dents are associated with the individual collision velocities and overall collision *** correlation between dent size and collision velocity was obtained from finite element calculations based on empirical *** proposed approach was validated using particle image velocimetry during secondary gas injection into a fluidized bed *** this case the effect of the distance between two opposed nozzles was *** a lab-scaled fluidized bed opposed jet mill the effects of gas pressure and hold-up were *** particle velocities were found to be sign ificantly lower tha n the gas velocities,while the nu mber of contacts per particle was determined to be extremely high.

关键词： Fluidized bed opposed jet mill Single particle probes Finite element modeling Stress number distribution Relative velocity distribution

Change in cap rock porosity triggered by pressure and temperature dependent CO_(2)-water-rock interactions in CO_(2) storage systems

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Petroleum 2017年第1期3卷 96-108页

作者： Christina Hemme wolfgang van Berk TU Clausthal Institute of Disposal ResearchDepartment of HydrogeologyLeibnizstrasse 1038642 Clausthal-ZellerfeldGermany

Carbon capture and storage in deep geological formations is a method to reduce greenhouse gas *** CO_(2) is injected into a reservoir and dissolves in the *** the impact of pressure and temperature(P-T)the aqueous species of the CO_(2)-acidified brine diffuse through the cap rock where they trigger CO_(2)-watererock *** geochemical reactions result in mineral dissolution and precipitation along the CO_(2) migration path and are responsible for a change in porosity and therefore for the sealing capacity of the cap *** study focuses on the diffusive mass transport of CO_(2) along a gradient of decreasing PeT *** process is retraced with a one-dimensional hydrogeochemical reactive mass transport *** semigeneric hydrogeochemical model is based on chemical equilibrium *** on a broad variety of scenarios,including different initial mineralogical,chemical and physical parameters,the hydrogeochemical parameters that are most sensitive for safe long-term CO_(2) storage are *** results demonstrate that PeT conditions have the strongest effect on the change in porosity and the effect of both is stronger at high PeT conditions because the solubility of the mineral phases involved depends on PeT ***,modeling results indicate that the change in porosity depends strongly on the initial mineralogical composition of the reservoir and cap rock as well as on the brine ***,a wide range of conditions for safe CO_(2) storage is identified.

关键词： rock reservoir geochemical

Animal models in experimental lung injury: Do we need a consensus conference?

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Acta Pharmacologica Sinica 2003年第12期 163-164页

作者： wolfgang S STROHMAIER,Soheyl BAHRAMI Margaretenstrasse 71/18 1050 Vienna Austria Margaretenstrasse 71/18 1050 Vienna Austria

INTRODUCTIONThe present situation is strikingly paradox: on the one hand, a continuously increasing number of animal models in experimental lung injury continuously reveals new insights into the pathophysiology of lung injury on every level between organ dysfunction and the related molecular triggers. On the other hand, we are con-

关键词： lung on Do we need a consensus conference Animal models in experimental lung injury in

Hepatospheres:Three dimensional cell cultures resemble physiological conditions of the liver

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World Journal of Hepatology 2010年第1期2卷 1-7页

作者： Franziska van Zijl wolfgang Mikulits Department of Medicine I Institute of Cancer ResearchMedical University of Vienna

Studying physiological and pathophysiological mechanisms in the liver on a molecular basis is a challenging *** two dimensional(2D) culture conditions hepatocytes dedifferentiate rapidly by losing metabolic functions and structural ***,inappropriate 2D hepatocellular models hamper studies on the xenobiotic metabolism of the liver which strongly influences drug ***,the lack of effective therapies against hepatocellular carcinoma shows the urgent need for robust models to investigate liver functions in a defined hepatic ***,we summarize and discuss three-dimensional cultures of hepatocytes,herein referred to as hepatospheres,which provide versatile tools to investigate hepatic metabolism,stemness and cancer development.

关键词： Hepatosphere Hepatocyte Tissue engineering 3D culture Microenvironment

Differences between hepatic and biliary lipid metabolism and secretion in genetically gallstone-susceptible and gallstone-resistant mice

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Chinese Medical Journal 2002年第9期115卷 1292-1295,143页

作者：许国强赵力 Michael fuchs 浙江大学医学院附属第一医院消化科杭州310003 浙江大学医学院附属第一医院心内科杭州310003 Department of Medicine

OBJECTIVE: To investigate differences between hepatic and biliary lipid metabolism and secretion of genetically gallstone-susceptible (C57L) and resistant (AKR) mice and the mechanism of cholesterol gallstone formation. METHODS: The inbred C57L and AKR mice were fed a lithogenic diet containing 15% fat, 1.25% cholesterol and 0.5% cholic acid for four weeks. Hepatic cholesterol content and secretion rates of biliary lipids, as well as phenotypes of the liver and gallbladder were determined and examined before and after the feeding of the lithogenic diet. RESULTS: Both before and after ingestion of the lithogenic diet, hepatic secretion rates of all biliary lipids in C57L mice were markedly higher than that of AKR mice (P

关键词： Genetic Predisposition to Disease Lipid Metabolism Animals Bile Cholelithiasis Cholesterol Fatty Liver Liver Male Mice Mice, Inbred AKR Mice, Inbred C57BL Research Support, Non-U.S. Gov't

Koutecky-Levich analysis applied to nanoparticle modified rotating disk electrodes： Electrocatalysis or misinterpretation？

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Nano Research 2014年第1期7卷 71-78页

作者： Justus Masa Christopher Batchelor-McAuley wolfgang Schuhmann Richard G. Compton Department of Chemistry Physical and Theoretical Chemistry Laboratory University of Oxford South Parks Road Oxford OX13QZ UK Analytische Chemie and Center for Electrochemical Sciences-CES Ruhr-Universitat Bochum Universitatsstr 150 D-44780 Bochum Germany

The application of naive Koutecky-Levich analysis to micro- and nano-particle modified rotating disk electrodes of partially covered and non-planar geometry is critically analysed. Assuming strong overlap of the diffusion fields of the particles such that transport to the entire surface is time-independent and one-dimensional, the observed voltammetric response reflects an apparent electrochemical rate o constant koapp, equal to the true rate constant ko describing the redox reaction of interest on the surface of the nanoparticles and the ratio,ψ, of the total electroactive surface area to the geometric area of the rotating disk surface. It is demonstrated that Koutecky-Levich analysis is applicable and yields the expected plots of I-1 versus ω-1 where I is the current and ω is the rotation speed but that the values of the electrochemical rate constants inferred are thereof koapp, not ko. Thus, for ψ 〉 1 apparent electrocatalysis might be naively but wrongly inferred whereas for ψ 〈 1 the deduced electrochemical rate constant will be less than ko. Moreover, the effect of ψ on the observed rotating disk electrode voltammograms is significant, signalling the need for care in the overly simplistic application of Koutecky-Levich analysis to modified rotating electrodes, as is commonly applied for example in the analysis of possible oxygen reduction catalysts.

关键词： rotating disk electrodes nanoparticles electrocatalysis electrode kinetics electro-reduction ofoxygen Koutecky-Levich analysis

Effects of newly devised plasma lice comb on human hair

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Plasma Science and Technology 2019年第12期21卷 78-84页

作者： Lars TEN BOSCH Andreas HUBER Philipp SAUERBIER Robert KOHLER Georg AVRAMIDIS wolfgang VIOL University of Applied Sciences and Arts HAWK Faculty NVon-Ossietzky-Strasse 99/10037085 GottingenGermany Neaspec GmbH Eglfinger Weg 285540 Munich-HaarGermany Wood Biology and Wood Products Faculty of Forest Sciences and Forest EcologyUniversity of GoettingenBüsgenweg 437077 GottingenGermany

A plasma device was developed showing high potential for a pesticide-free treatment of pediculosis. As a first safety assessment of the device was presented earlier, this present paper focuses on the damage introduced to human hair during a plasma treatment for pediculosis control. Therefore, human hairs were treated repeatedly to assess the possible occurring damage developing with increasing treatment durations. To analyse the inflicted changes on human hair examinations using x-ray photoelectron spectroscopy(XPS/ESCA), scanning nearfield optical microscopy(SNOM) and scanning electron microscopy were conducted, to compare the modifications of surface chemistry and mechanical alterations. The investigations revealed a mild impact on the surface chemistry(XPS/SNOM), while more distinct morphological changes on the hair surface could be observed. The authors conclude that an effect of the plasma comb device on the hair during a real-life treatment is negligible, due to the very short contact times during a standard combing procedure for pediculosis control.

关键词： atmospheric pressure plasma dielectric barrier discharge pediculosis SEM SNOM ESCA XPS hair smoothing plasma based pest management

Effects of Saccharomyces cerevisiae or boulardii yeasts on acute stress induced intestinal dysmotility

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World Journal of Gastroenterology 2016年第48期22卷 10532-10544页

作者： Christine West Andrew M Stanisz Annette Wong wolfgang A Kunze McMaster Brain-Body Institute St. Joseph’s Healthcare Department of Biology McM aster University Department of Psychiatry and Behavioural Neurosciences Mc Master University

AIM To investigate the capacity of Saccharomyces cerevisiae(S. cerevisiae) and Saccharomyces boulardii(S. boulardii) yeasts to reverse or to treat acute stress-related intestinal *** Adult Swiss Webster mice were stressed for 1 h in a wire-mesh restraint to induce symptoms of intestinal dysmotility and were subsequently killed by cervical dislocation. Jejunal and colon tissue were excised and placed within a tissue perfusion bath in which S. cerevisiae, S. boulardii, or their supernatants were administered into the lumen. Video recordings of contractility and gut diameter changes were converted to spatiotemporal maps and the velocity, frequency, and amplitude of propagating contractile clusters(PCC) were measured. Motility pre- and post-treatment was compared between stressed animals and unstressed controls. RESULTS S. boulardii and S. cerevisiae helped to mediate the effects of stress on the small and large intestine. Restraint stress reduced jejunal transit velocity(mm/s)from 2.635 ± 0.316 to 1.644 ± 0.238, P < 0.001 and jejunal transit frequency(Hz) from 0.032 ± 0.008 to 0.016 ± 0.005, P < 0.001. Restraint stress increased colonic transit velocity(mm/s) from 0.864 ± 0.183 to 1.432 ± 0.329, P < 0.001 and frequency to a lesser degree. Luminal application of S. boulardii helped to restore jejunal and colonic velocity towards the unstressed controls; 1.833 ± 0.688 to 2.627 ± 0.664, P < 0.001 and 1.516 ± 0.263 to 1.036 ± 0.21, P < 0.001, respectively. S. cerevisiae also had therapeutic effects on the stressed gut, but was most apparent in the jejunum. S. cerevisiae increased PCC velocity in the stressed jejunum from 1.763 ± 0.397 to 2.017 ± 0.48, P = 0.0031 and PCC frequency from 0.016 ± 0.009 to 0.027 ± 0.007, P < 0.001. S. cerevisiae decreased colon PCC velocity from 1.647 ± 0.187 to 1.038 ± 0.222, P < 0.001. Addition of S. boulardii or S. cerevisiae supernatants also helped to restore motility to unstressed values in similar capacity. CONCLUSION The

关键词： Intestine Saccharomyces cerevisiae Saccharomyces boulardii Restraint stress Motility