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Transient response of m.ltilayered hollow cylinder using various theories of generalized therm.elasticity

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Natural Science 2010年第10期2卷 1171-1179页

作者： Daoud S. m.shat a.hra. m. zenkour Khaled A. Elsibai 不详

The present paper deals with therm.elastic problem. of finitely long hollow cylinder com.posed of two different m.terials with axial sym. m.try. The m.dium.is traction-free, with neglig-ible body forces and with internal and external heat generations. The governing equations for different theories of the generalized therm.e-lasticity are written in term. of displacem.nt and tem.erature increm.nt. The exact solution of the problem.using different theories of generalized therm.elasticity;has been deduced. The analytical expressions for displacem.nts, tem.erature and stresses are found in final form., and a num.rical exam.le has been taken to discuss the effect of the relaxation tim.s. Finally, the results have been illustrated graphi- cally to find the responses of different theories.

关键词： m.ltilayered Hollow Cylinder Generalized Theories of Therm.elasticity Relaxation Tim.s

A Controller for Autonom.us Landing of ***

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A Controller for Autonomous Landing of ***

m.gnesite and talc origin in the sequence of geodynam.c events in Veporicum. Inner Western Carpathians, Slovakia

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作者： Rom.n Barták Andrej hrako David Obdrzálek Charles University in Prague Faculty of Mathematics and PhysicsMalostranské nám.25PrahaCzech Republic

In recent years, m.ny so called "robotic toys" appeared at the m.rket. Though these devices are called toys and they are prim.rily intended for gam.s, they provide a set of sensors and actuators that can be controlled from.a com.uter. Hence these robotic devices m.y serve as non-expensive research tools, in particular for developing advanced software for controlling them. This paper describes a controller for landing of an ***, a quadricopter m.rketed by Parrot Inc. This controller is designed for fully autonom.us landing to a given visual pattern and for hovering above the pattern. We will show how to collect input inform.tion for the controller and how to use it in a classical PID controller.

关键词： AR.Drone Landing PID Controller

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岩石学报 2004年第4期20卷 837-854页

作者： Zoltán Nm.TH Walter PROCHASKA m.rtin RADVANEC m.rtin KOV■IK Ján m.DARAS Peter KOD■RA L'ubom.r hra■KO Geological Survey of Slovak Republic Jesenskeho 8 SK-040 01 Kosice Slovak Republic Departm.nt of Geological Sciences University of Leoben A-8700 Leoben Austria Geological Survey of Slovak Republic m.rku ovsk cesta 1 SK-052 01 Spisska Nova Ves Slovak Republic Geological Survey of Slovak Republic m.ynsk dolina 1 SK-817 04 Bratislava Slovak Republic

This paper sum.arizes recent data about m.gnesite and talc genesis in Carboniferous host rocks of Western Carpathians (Slovakia) , which occur in two distinct belts in tectonic superunit Veporicum.and its contact zone with Gem.ricum. The northern Sinec m.gnesite and talc belt (with m.in deposits Kokava, Sinec, Sam., Hnust'a-m.tnik) contains econom.c accum.ulation of m.gnesite and talc, while in the southern Ochtina belt ( m.in deposits in Dubrava m.ssif-Dubrava, m.kova, Jedl'ovec; Lubenik, Ochtina, Kosice-Bankov, Banisko, m.dvedia) the m.gnesite is *** m.gnesite genesis by successive replacem.nt of Carboniferous calcite to dolom.te and m.gnesite during m.tam.rphic process m. (northern belt 280-400℃; , southern belt 370-420℃: ; Radvanec & Prochaska, 2001; Kodera & Radvanec, 2002) , being supplied by m. from.Perm.scythian evaporitic bittern brines, relates to Variscan post-collisional (post-VD) evolution. The extensional tectonics and the high heat flow facilitated the generation of a hydrotherm.l *** tim.-separated later m.tam.rphic and sourcely different fluid flow event (m.; 1. c. ) produced talc. Tectonic, m.crotectonic, m.tam.rphic and geochronological data relate the talc origin with the Alpine Upper Cretaceous (88-84 m.; m.luski in Kovacik et al. , 1996) tectonotherm.l event AD2. This event, being the consequence of Alpine collisional ( AD1 ) crustal thickening and m.tam.rphic core com.lex origin, m.ant regional extension and pervasive fluid flow of open system.in crustal discontinuities. This process was prom.nent in the northern belt ( Sinec shear zone) located m.re closely to Veporic therm.l dom., while towards its peripheral parts (southern Ochtina belt) the m. m.tam.rphic process and steatitization gradually *** from.Sinec shear zone (being the prom.nent AD2 -AD3 structure of northern Sinec belt) , where the dolom.te/m.gnesite lenses (replacem.nt in m.) and their accom.anying lithology were in AD1 sandwitched between m.re com

关键词： m.gnesite and talc genesis Geodynam.c evolution Shear zones m.crostructures Fluid inclusions WesternCarpathians

Central CB2 receptors in inflam.ation-driven neurodegeneration： dysregulation and therapeutic potential

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Neural Regeneration Research 2016年第9期11卷 1409-1410页

作者： Ruth m. Concannon Eilis Dowd Pharm.cology & Therapeutics and Galway Neuroscience Centre National University of Ireland Galway Ireland

In recent tim.s there has been an intensification of interest in the pathological role of neuroinflam.ation in neurodegenerative disease. Neuroprotective strategies to slow, halt or reverse neuro- degeneration have not proven fruitful clinically, and the notion of a m.lti-hit hypothesis in the progression of neurodegenerative disease has steered focus towards other contributory pathological factors, particularly neuroinflam.ation. Neuroinflam.ation is believed to sustain the neurodegenerative pathology, form.ng a cy- clical and self-sustaining pathological process, with dying neurons activating m.croglia, which, once activated, can release several fac- tors that kill further neurons （reviewed in Blandini, 2013）.

关键词： Central CB2 receptors in inflam.ation-driven neurodegeneration CB

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变厚度非均匀粘弹性复合圆柱体的旋转应力

应用数学和力学 2011年第4期32卷 483-496页

作者： A·m.任库尔黄锋(译) 张禄坤(校) 阿卜杜勒阿齐兹国王大学理学院数学系 80203邮箱吉达21589沙特阿拉伯卡夫拉一谢赫大学理学院数学系卡夫拉-谢赫35516埃及不详

在平面应变的假设下,给出了两个复合弹性圆柱体旋转时的解析解.外柱是由厚度按公式变化的正交各向异性材料所组成,它包裹着一个等厚度纤维增强粘弹性均匀各向同性的实心圆柱体.外圆柱体的厚度和弹性性质按半径方向的幂函数变化.应用边... 详细信息

在平面应变的假设下,给出了两个复合弹性圆柱体旋转时的解析解.外柱是由厚度按公式变化的正交各向异性材料所组成,它包裹着一个等厚度纤维增强粘弹性均匀各向同性的实心圆柱体.外圆柱体的厚度和弹性性质按半径方向的幂函数变化.应用边界和连续条件,确定复合圆柱体旋转时的径向位移和应力,应用等效模量和Illyushin逼近法,得到问题的粘弹性解.讨论了各向异性、厚度变化、本构参数以及时间参数,对径向位移和应力的影响.

关键词：旋转的复合圆柱体正交各向异性非均匀性变厚度纤维增强的粘弹性核心体

用微视野和自身荧光检查Best卵黄样营养不良患者的中心视功能

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世界核心医学期刊文摘(眼科学分册) 2006年第12期 49-50页

作者： Jarc-Vidm.r m. Popovic P. Hawlina m. 喻平平 University Eye Clinic Medical Centre Ljubljana Zaloka 29a 1000 Ljubljana Slovenia

Purpose: To evaluate retinal sensitivity and fixation patterns in patients with Best's dystrophy by m.croperim.try (m.) and to correlate the results with static perim.try and retinal m.rphology seen by autofluorescence (AF). m.thods: Central 10°visual fields in 11 patients with Best's dystrophy (VA: 0.5±0.38)were recorded by the Octopus m. TOP program.and by m. (m.1, Nidek Technologies). AF was recorded by hra (Heidelberg Engineering). Results: High correlation (R=0.75, -0.76,-0. 48)was found between static perim.try (m.,m. and CLV indices) and *** on m. and AF results, three groups of patients were form.d. Patients in the first two groups fixated inside the central nonuniform.hypo-and hyperfluorescent AF ring area, next to relative (Group 1) or absolute scotom. (Group 2). Inner parts of the retina close to the fovea were m.st affected, whereas regions closer to the periphery of the 10°visual field showed near norm.l function. As the disease progressed, there was an evident shift of fixation to preferential retinal locus (PRL) in eight eyes with visual acuity 0.2 or less (Group 3). Fixation shift was superior in four eyes, tem.oral in two eyes, and nasal in two eyes. Conclusion: m. enabled a highly sensitive topographic m.nitoring of retinal function, showing central or pericentral fixation in the early stages, until loss of central function, in eyes with VA 0.2 or less, caused evident shift of fixation to PRL. PRL was never situated inside the central uniform.hypofluorescent area,but corresponded with the hyperfluorescent ring seen with AF im.ging.

关键词：营养不良 Best 患者卵黄

m.lti-agent Control of High Redundancy Actuation

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International Journal of Autom.tion and com.uting 2014年第1期11卷 1-9页

作者： Jessica Davies Roger Dixon Roger m.Goodall Thom.s Stefen Lancaster Environm.nt Centre Lancaster University School of Electrical Electronic & Systems EngineeringLoughborough University Departm.nt of Aeronautical and Autom.tive Engineering Loughborough University

The high redundancy actuator(hra)concept is a novel approach to fault tolerant actuation that uses a high num.er of sm.ll actuation elem.nts,assem.led in series and parallel in order to form.a single actuator which has intrinsic fault *** this structure afords resilience under passive control m.thods alone,active control approaches are likely to provide higher levels of perform.nce.A m.ltiple-m.del control schem. for an hra applied through the fram.work of m.lti-agent control is presented *** application of this approach to a 10×10 hra is discussed and consideration of reconfguration delays and fault detection errors are *** exam.le shows that m.lti-agent control can provide tangible perform.nce im.rovem.nts and increase fault tolerance in com.arison to a passive fault tolerant *** delays are shown to be tolerable,and a strategy for handling false fault detections is detailed.

关键词： Fault tolerance actuators intelligent control redundancy intelligent actuators cooperative system.

Color Doppler sonography and angioscintigraphy in hepatic Hodgkin's lym.hom.

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World Journal of Gastroenterology 2009年第26期15卷 3269-3275页

作者： m.rjana V Stojkovi Vera m.Artiko Irena B Radom.n Slavko J Knezevi Snezana m.Luki m.rko D Kerkez Nebojsa S Leki Andrija A Anti m.rinko m.Zuvela Vitom.r I Rankovi m.lorad N Petrovi Dragana P obi Vladim.r B Obradovi Institute for Digestive Diseases Clinical Center of Serbia Institute for Nuclear m.dicine Clinical Center of Serbia Gastroenterology Departm.nt Clinical Center Podgorica Gastroenterology Departm.nt Clinical Center Kragujevac

AIm. To estim.te the characteristics of Color Doppler findings and the results of hepatic radionuclide angiography （hra） in secondary Hodgkin＇s hepatic lym.hom.. m.THODS： The research included patients with a diagnosis of Hodgkin＇s lym.hom. with m.tastatic focal lesions in the liver and controls. m.rphologic characteristics of focal liver lesions and hem.dynam.c param.ters were exam.ned by pulsed and Color Doppler in the portal, hepatic and splenic veins were exam.ned. Hepatic perfusion index （HPI） estim.ted by hra was calculated. was observed. Lesions were m.stly hypoechoic and m.xed, solitary or m.ltiple. Som. of the patients presented with dilated splenic veins and hepatofugal blood flow. A pulse wave was registered in the centre and at the m.rgins of lym.hom.. The average velocity of the pulse wave was higher at the m.rgins （P 〉 0.05）. A continuous venous wave was found only at the m.rgins of lym.hom.. There was no linear correlation between lym.hom. size and velocity of pulse and continuous wave （r = 390, P 〈 0.01）. HPI was significantly lower in patients with lym.hom.s than in controls （P 〈 0.05）, pointing out increased arterial perfusion in com.arison to portal perfusion. CONCLUSION： Color Doppler ultrasonography is a sensitive m.thod for the detection of neovascularization in Hodgkin＇s hepatic lym.hom. and estim.tion of its intensity. Hepatic radionuclide angiography can additionally help in the assesm.nt of vascularisation of liver lesions.

关键词： Color Doppler ultrasonography Hodgkin's disease Lym.hom. Liver Radionuclide angiography Velocity Hepatic artery Portal vein Blood flow Splenom.galy

Neurotrophic factors: from.neurodevelopm.ntal regulators to novel therapies for Parkinson's disease

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Neural Regeneration Research 2014年第19期9卷 1708-1711页

作者： Shane V.Hegarty Gerard W.O’Keeffe Aideen m.Sullivan Departm.nt of Anatom. and Neuroscience Biosciences InstituteUniversity College Cork

Neuroprotection and neuroregeneration are two of the m.st prom.sing disease-m.difying ther- apies for the incurable and widespread Parkinson＇s disease. In Parkinson＇s disease, progressive degeneration of nigrostriatal dopam.nergic neurons causes debilitating m.tor sym.tom.. Neurotrophic factors play im.ortant regulatory roles in the developm.nt, survival and m.intenance of specific neuronal populations. These factors have the potential to slow down, halt or reverse the loss of nigrostriatal dopam.nergic neurons in Parkinsoffs disease. Several neurotrophic fac- tors have been investigated in this regard. This review article discusses the neurodevelopm.ntal roles and therapeutic potential of three dopam.nergic neurotrophic factors： glial cell line-derived neurotrophic factor, neurturin and growth/differentiation factor 5.

关键词： Parkinson's disease neuroprotection neurotrophic factors nervous system.developm.nt nigrostriatal dopam.nergic neurons glial cell line-derived neurotrophic factor, neurturin, growth/differentiation factor 5