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Assessment of Timoshenko Beam Models for Vibrational Behavior of single-Walled carbon Nanotubes using Molecular Dynamics

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Advances in Applied Mathematics and Mechanics 2009年第1期1卷 89-106页

作者： Y.Y.Zhang c.M.Wang V.B.c.Tan Department of Mechanical Engineering National University of SingaporeKent RidgeSingapore 119260 Engineering science Programme and Department of civil Engineering National University of SingaporeKent RidgeSingapore 117574

In this paper,we study the flexural vibration behavior of single-walled carbon nanotubes(sWcNTs)for the assessment of Timoshenko beam ***tensive molecular dynamics(MD)simulations based on second-generation reactive empirical bond-order(REBO)potential and Timoshenko beam modeling are performed to determine the vibration frequencies for sWcNTs with various length-todiameter ratios,boundary conditions,chiral angles and initial *** effectiveness of the local and nonlocal Timoshenko beam models in the vibration analysis is assessed using the vibration frequencies of MD simulations as the *** is shown herein that the Timoshenko beam models with properly chosen parameters are applicable for the vibration analysis of *** simulation results show that the fundamental frequencies are independent of the chiral angles,but the chirality has an appreciable effect on higher vibration *** sWcNTs is very sensitive to the initial strain even if the strain is extremely small.

关键词： Vibration carbon nanotubes molecular dynamics Timoshenko beam models

Development of Lattice Boltzmann Flux solver for simulation of Incompressible Flows

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Advances in Applied Mathematics and Mechanics 2014年第4期6卷 436-460页

作者： c.shu Y.Wang c.J.Teo J.Wu Department of Mechanical Engineering National University of Singapore10 Kent Ridge CrescentSingapore 119260 Department of Aerodynamics College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China

A lattice Boltzmann flux solver(LBFs)is presented in this work for simulation of incompressible viscous and inviscid *** new solver is based on chapman-Enskog expansion analysis,which is the bridge to link Navier-stokes(N-s)equations and lattice Boltzmann equation(LBE).The macroscopic differential equations are discretized by the finite volume method,where the flux at the cell interface is evaluated by local reconstruction of lattice Boltzmann solution from macroscopic flow variables at cell *** new solver removes the drawbacks of conventional lattice Boltzmann method such as limitation to uniform mesh,tie-up of mesh spacing and time interval,limitation to viscous *** is validated by its application to simulate the viscous decaying vortex flow,the driven cavity flow,the viscous flow past a circular cylinder,and the inviscid flow past a circular *** obtained numerical results compare very well with available data in the literature,which show that LBFs has the second order of accuracy in space,and can be well applied to viscous and inviscid flow problems with non-uniform mesh and curved boundary.

关键词： chapman-Enskog analysis flux solver incompressible flow Navier-stokes equation lattice Boltzmann equation

Mathematical Analysis for Peristaltic Flow of Two Phase Nanofluid in a curved channel

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communications in Theoretical Physics 2015年第11期64卷 547-554页

作者： s.Nadeem Iqra shahzadi Department of Mathematics Quaid-i-Azam University

This paper describes the theoretical analysis for peristaltic motion of water base nanoBuid containing distinct types of the nanoparticles like cu,TiO_2,and Al_2O_*** of nano Quid are modelled and simplified by constructing the suppositions of low Reynolds number as well as long wave *** reduced equations are solved *** are represented through *** for the velocity,temperature,pressure rise and stream lines are analyzed *** work presented here is based on the fictitious values,however some other values can be tested experimentally.

关键词： peristaltic flow nanofluid curved channel exact so

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cloud-Based software Development Lifecycle:A simplified Algorithm for cloud service Provider Evaluation with Metric Analysis

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Big Data Mining and Analytics 2023年第2期6卷 127-138页

作者： santhosh s Narayana swamy Ramaiah computer science&Engineering Jain(Deemed-to-be University)Bangalore 562112India

At present,hundreds of cloud vendors in the global market provide various services based on a customer’s *** cloud vendors are not the same in terms of the number of services,infrastructure availability,security strategies,cost per customer,and reputation in the ***,software developers and organizations face a dilemma when choosing a suitable cloud vendor for their developmental ***,there is a need to evaluate various cloud service providers(csPs)and platforms before choosing a suitable *** existing solutions are either based on simulation tools as per the requirements or evaluated concerning the quality of service ***,they require more time to collect data,simulate and evaluate the *** proposed work compares various csPs in terms of major metrics,such as establishment,services,infrastructure,tools,pricing models,market share,etc.,based on the comparison,parameter ranking,and weightage ***,the parameters are categorized depending on the priority *** weighted average is calculated for each csP,after which the values are sorted in descending *** experimental results show the unbiased selection of csPs based on the chosen *** proposed parameter-ranking priority level weightage(PRPLW)algorithm simplifies the selection of the best-suited cloud vendor in accordance with the requirements of software development.

关键词： cloud-based software development life cycle(sDLc) cloud evaluation parameter-ranking priority level weightage(PRPLW)algorithm cloud service providers software engineering

Geochemical tracing and modeling of surface and deep water–rock interactions in elementary granitic watersheds(strengbach and Ringelbach cZOs, France)

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Acta Geochimica 2017年第3期36卷 363-366页

作者： F.chabaux D.Viville Y.Lucas J.Ackerer c.Ranchoux c.Bosia M.c.Pierret T.Labasque L.Aquilina R.Wyns c.Lerouge c.Dezaye P.Négreol Laboratoire D'Hydrologie et de Géochimie de strasbourg (LHyGes) CNRS Université de Strasbourg 1 Rue Blessig 67084 Strasbourg Cedex France cNRs Géosciences Rennes UMR 6118 Université de Rennesl Campus de Beaulieu 35042 Rennes Cedex France BRGM 3 Avenue Claude Guillemin 45060 Orléans France

From the study of the strengbach and Ringelbach watersheds we propose to illustrate the interest of combining the geochemical tracing and geochemical modeling approaches on surface and deep borehole waters,to decipher the diversity of the water flow and the associated water–rock interactions in such elementary mountainous catchments. The results point to a clear geochemical typology of waters depending on the water circulations(deep vs. hypodermic) within the substratum.

关键词： Weathering Water pathways U activity ratios sr isotope ratios Anthropogenic gases(cFc,sF6) cZO

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Activation of mitochondrial ATP-sensitive potassium channels delays ischemia-induced cellular uncoupling in rat heart

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Acta Pharmacologica sinica 2004年第1期 24-30页

作者： Iain c BRUcE china Department of Physiology Faculty of Medicine The University of Hong Kong

AIM: To test the hypothesis that cellular uncoupling induced by myocardial ischemia is mediated by activation of cmitochondrial ATP-sensitive potassium channels (mitoKATP). METHODs: Rat hearts were perfused on a Langendorff apparatus and subjected to 40-min ischemia followed by 30-min reperfusion (I/R). changes in cellular coupling were monitored by measuring whole-tissue resistance. REsULTs: (1) In hearts subjected to I/R, the onset of uncoupling started at (13.3±1.0) mm of ischemia; (2) Ischemic preconditioning (IPc) delayed the onset of uncoupling until (22.7±1.3) min. Blocking mitoKATP channels with 5-

关键词： heart mitochondria potassium channels adenosine ttiphosphate ischemic preconditioning uncoupling

Nanoscale Track Diameter and Hydrogen Yield: Dependence upon charge state of Incident Ion on Polystyrene

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World Journal of condensed Matter Physics 2013年第1期3卷 95-101页

作者： D. P. gupta R. s. chauhan shyam Kumar P. K. Diwan s. A. Khan Ambuj Tripathi santanu Ghosh V. K. Mittal Department of Applied sciences Chitkara Institute of Engineering and Technology Chandigarh India Department of Physics Indian Institute of Technology New Delhi India Department of Physics Kurukshetra University Kurukshetra India Department of Physics Punjabi University Patiala India Department of Physics RBS College Agra India Inter University Accelerator centre New Delhi India

The study of radiation damage of high- molecular weight substances due to MeV ion interactions is of interest for engineering and scientific applications. In the present study polystyrene (Ps) was irradiated with 107Ag ions of three different charge states (q) 11+, 14+ and 25+ and of 130 MeV energy. The emission of hydrogen from Ps was monitored as a function of the incident ion fluence. The experimental results showed that the hydrogen depletion per incident ion from Ps varies as qn, where n was found to be 2.1 as compared to the value 2.7 to 3.0 reported in the literature. Radii of the nanometric damaged zones or ion tracks formed were analyzed from the slope of the hydrogen depletion versus ion fluence curves as a function of charge state of incident ion. These have values between 3.2 - 6.8 nm. These radii were found to depend upon the charge state of the incident ion and vary as qm, where m has the value 0.9.

关键词： Polystyrene Heavy Ions Ion Fluence Hydrogen Depletion cross-section Track Radius

spectral and Timing Analysis of the Black Hole Transient MAXI J1631–479 During its 2019 Outburst Observed with Insight-HXMT

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Research in Astronomy and Astrophysics 2022年第11期22卷 21-33页

作者： Yu-cong Fu L.M.song G.Q.Ding s.N.Zhang J.L.Qu s.Zhang L.Zhang Q.c.Bu Y.Huang X.Ma Z.X.Yang Y.L.Tuo X.F.Lu D.K.Zhou B.Y.Wu T.M.Li Y.c.Xu Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqiXinjiang 830011China University of chinese Academy of sciences Chinese Academy of SciencesBeijing 100049China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Institut fur Astronomie und Astrophysik Kepler Center for Astro and Particle PhysicsEberhard Karls UniversitatSand 1D-72076 TübingenGermany

We report spectral and timing analysis of the black hole transient MAXI J1631–479 during the hard intermediate state of its 2019 outburst from the Insight-Hard X-ray Modulation Telescope(Insight-HXMT)*** find that the energy dependence of the type-c quasi-periodic oscillation(QPO)frequency evolves with time:during the initial rise of a small flare(~MJD 58526.0-58527.1),the QPO frequency increases with increasing energy from~1 to~100 ke V,and then the frequency remains constant after MJD *** discover a possible new phenomenon of Fe line’s QPO frequency jump that has never been observed for other black hole transients:during the small flare,the QPO frequency around the Fe line energy is higher than any other energy band,with the frequency difference Δf=0.25±0.08 Hz between 5.5–7.5 ke V and other energy *** spectral analysis shows that the evolution of QPOs is related to the equivalent width of the narrow Fe line,and its equivalent width increases during this small *** propose that the QPO frequency difference results from the differential precession of a vertically extended jet,and the higher QPO frequency of Fe line could be caused by the layered jet when the jet scale *** the same time,the evolution of QPOs is related to the accretion rate,while the energy dependence of QPOs supports the existence of deceleration in the vertically distributed jet.

关键词： accretion accretion disks stars:black holes X-rays:binaries

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Anaesthetic Management of Malignant Granulosa cell Tumour of Ovary in a Paediatric Patient: A case Report

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Open Journal of Anesthesiology 2015年第12期5卷 245-250页

作者： Manisha Bhatt Dwivedi sumit gupta satya sree Nakul Mittal Jaggy Dhillon Department of Anaesthesiology and critical care MMIMSR Mullana Ambala Haryana India

Juvenile granulosa cell tumour (JGcT) is very uncommon gynaecological malignancy that occurs mostly commonly in less than five years of age. Only 0.1 percent of all ovarian tumours and 4 - 5 percent of granulosa cell tumours present as JGcT. The most common presentation of these tumours in children is precocious puberty. We describe anaesthetic management of a case of JGcT in a 1-year-old girl. The malignancy is assigned to International Federation of Gynaecology and Obstetrics staging system (FIGO stage I). It was treated with complete excision and histological examination confirmed the diagnosis.

关键词： Juvenile Granulosa cell Tumour Anaesthetic Management Haemodynamic Alteration Respiratory Distress