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Kinematic calibration of precise 6-DOF Stewart platform-type positioning systems for radio telescope applications

Frontiers of Mechanical engineering 2013年第3期8卷 252-260页

作者： Juan Carlos JUReGUI eusebio e.hernndez Marco CeCCAReLLI Carlos LOPeZ-CAJUN Alejandro GARCIA División de estudios de Posgrado Facultad de IngenieríaUniversidad Autónoma de Quéretaro QuéretaroQro.Mexico National Polytechnic Institute IPNSection of Graduate Studies and ResearchESIME-UPTMéxico D.F.Mexico Laboratory of Robotics and Mechatronics University of Cassino Italy Universidad Autónoma de Quéretaro Querétaro Qro.México CIATeQ A.C.AguascalientesAgs.México

The pose accuracy of a parallel robot is a function of the mobile platform ***,there is no a single value of the robot’s *** this paper,two novel methods for estimating the accuracy of parallel robots are *** the frst method,the pose accuracy estimation is calculated by considering the propagation of each error,i.e.,error variations are considered as a function of the actuator’s *** the second method,it is considered that each actuator has a constant error at any *** methods can predict pose accuracy of precise robots at design stages,and/or can reduce calibration time of existing *** example of a six degree-of-freedom parallel manipulator is included to show the application of the proposed methods.

关键词： pose errors error estimation parallel robot radio telescopes

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Drag reduction via turbulent boundary layer flow control

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Science China(Technological Sciences) 2017年第9期60卷 1281-1290页

作者： ABBAS Adel BUGeDA Gabriel FeRReR esteban FU Song PeRIAUX Jacques PONS-PRATS Jordi VALeRO eusebio ZHeNG Yao School of Aeronautics Escuela Tecnica Superior de lngenierla Aeronautica y del Espacio de la Universidad Politecnica de Madrid (ETS1.4E-UPM) Universidad Politecnica de Madrid Pza. Cardenal Cisneros 3 Madrid E-28040 Spain International Center for Numerical Methods in engineering (CIMNe) Gran Capita s/n Campus Nord UPC Barcelona 08034 Spain Civil and environmental Department Universitat Politecnica de Catalunya. BarcelonaTech Gran Capita s/n Campus Nord UPC Barcelona 08034 Spain Centre for Computational Simulation-UPM Scientific and Technological Park (Campus Montegancedo) 28223 Pozuelo de Alarcon Spain School of Aerospace engineering Tsinghua University Beijing 100084 China School of Aeronautics andAstronautics Zhejiang University Hangzhou 310027 China

Turbulent boundary layer control(TBLC) for skin-friction drag reduction is a relatively new technology made possible through the advances in computational-simulation capabilities,which have improved the understanding of the flow structures of *** in micro-electronic technology have enabled the fabrication of active device systems able to manipulating these *** combination of simulation,understanding and micro-actuation technologies offers new opportunities to significantly decrease drag,and by doing so,to increase fuel efficiency of future *** literature review that follows shows that the application of active control turbulent skin-friction drag reduction is considered of prime importance by industry,even though it is still at a low technology readiness level(TRL).This review presents the state of the art of different technologies oriented to the active and passive control for turbulent skin-friction drag reduction and contributes to the improvement of these technologies.

关键词： turbulent boundary layer flow control drag reduction skin-friction drag reduction

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expression of matrix metalloproteinase-11 is increased under conditions of insulin resistance

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World Journal of Diabetes 2017年第9期8卷 422-428页

作者： Biagio Arcidiacono eusebio Chiefari Anna elisa Laria Sebastiano Messineo Francesco Luciano Bilotta Domenico Britti Daniela Patrizia Foti Anna Foryst-Ludwig Ulrich Kintscher Antonio Brunetti Department of Health Sciences University"Magna Gr█cia"of Catanzaro Institute of Phar-macology Center for Cardiovascular Research

AIM To investigate matrix metalloproteinase-11(MMP-11) expression in adipose tissue dysfunction, using in vitro and in vivo models of insulin *** Culture of mouse 3T3-L1 preadipocytes were induced to differentiation into mature 3T3-L1 adipocytes. Cellular insulin resistance was induced by treating differentiated cultured adipocytes with hypoxia and/or tumor necrosis factor(TNF)-α, and transcriptional changes were analyzed in each condition thereafter. For the in vivo studies, MMP-11 expression levels were measured in white adipose tissue(WAT) from C57BL/6J mice that underwent low fat diet or high-fat feeding in order to induce obesity and obesity-related insulin resistance. Statistical analysis was carried out with GraphP ad Prism *** MMP-11 m RNA expression levels were significantly higher in insulin resistant 3T3-L1 adipocytes compared to control cells(1.46±0.49vs0.83±0.21, respectively;Pe increase in MMP-11 expression was observed even in the presence of TNF-α alone(3.79±1.11vs1±0.17, Pe(1.79±0.7vs0.88±0.1, Pe results obtained in in vitro experiments were confirmed in the in vivo model of insulin resistance. In particular, MMP-11 m RNA was upregulated in WAT from obese mice compared to lean mice(5.5±2.8vs1.1±0.7, respectively; Pe-08). The increase in MMP-11 levels in obese mice was accompanied by the increase in typical markers of fibrosis, such as collagen type Ⅵ alpha 3(Col6_α3), and fibroblast-specific protein *** Our results indicate that dysregulation of MMP-11 expression is an early process in the adipose tissue dysfunction, which leads to obesity and obesity-related insulin resistance.

关键词： Metalloproteinase-11 Insulin resistance Type 2 diabetes Fibrosis Hypoxia Tumor necrosis factor-α Inflammation

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Ammonia Diffusion Phenomena through Nalophan<sup>TM</sup>Bags Used for Olfactometric Analyses

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Journal of environmental Protection 2014年第11期5卷 949-961页

作者： Selena Sironi Lidia eusebio Laura Capelli emanuela Boiardi Renato Del Rosso Jean-Michel Guillot Department of Chemistry Materials and Chemical Engineering “Giulio Natta” Politecnico di Milano Milano Italy Laboratory of Industrial environment engineering Ecole des Mines d’Alès Alès cedex France

The ammonia loss through NalophanTM bags has been studied. Ammonia was chosen as target compound in order to be representative of odorous molecules of small dimensions. The losses observed for storage conditions and times as allowed by the reference standard for dynamic olfactometry (eN 13725:2003) indicate that odour concentration values due to the presence of small molecules may be significantly underestimated if samples are not analysed immediately after sampling. The diffusion coefficient of ammonia through the NalophanTM film was evaluated using the Fick’s law, and it turned out to be equal to 2.38e-12 (m2/s). The results and their theoretical interpretation indicate that concentration losses due to ammonia diffusion through the NalophanTM film can be decreased by using large bags and filling them up to their maximum capacity.

关键词： Sampling Bag Diffusion Odour Sampling Ammonia Nalophan

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