Results 41 to 50 of about 80,326 (308)
Construction of discrete-time model for port-controlled Hamiltonian systems with applications [PDF]
, 2006 The issues of constructing a discrete-time model for Hamiltonian systems are in general different from those for dissipative systems. We propose an algorithm for constructing an approximate discrete-time model, which guarantees Hamiltonian conservation ...
Astolfi, A., +4 more
core +1 more source
Multifunctional Single Layer Metasurface Based on Hexagonal Split Ring Resonator
IEEE Access, 2020 We present a single-layer metasurface, which performs both cross and circular polarization conversion at multiple frequency bands. The unit cell of the proposed metasurface consists of periodic array of a uniquely designed hexagonal split ring resonator (
Muhammad Salman Salman +3 more
doaj +1 more source
Angular needle tracker and stabilizer for image-guided interventions
Minimally Invasive Therapy & Allied Technologies, 2020 Minimally invasive image-guided interventions have changed the face of procedural medicine. For these procedures, safety and efficacy depend on precise needle placement. Needle targeting devices help improve the accuracy of needle placement, but their use has not seen broad penetration.
Zhao, Z +5 more
openaire +3 more sources
Attitude Control for a Rigid-Body With Dynamic Disturbance Based on Angular Velocity Observer
IEEE Access, 2022 In this paper, we propose a geometric control law for attitude robust control problem of a rigid body system without angular velocity measurement. We suppose there is a disturbance related to angular velocity and attitude in the system. Under appropriate
Jinyu Zhao, Fangfei Li
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On the stability of the complex angular-momentum continuation
Nuclear Physics B, 1971 Abstract Stability estimates for the complex angular-momentum continuation are proved with the addition of a prescribed exponential bound or a prescribed uniform bound. Some numerical examples are given in order to show that the stability is quantitavely still extremely poor.
K. Miller, G.A. Viano
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Measuring temperature of the ice surface during its formation by using infrared instrumentation [PDF]
, 2007 A non-destructive remote sensing technique was used to measure the surface temperature of a thin macroscopic water film flowing on a growing asymmetric ice accretion during its formation inside an icing research wind tunnel.
Kollar, László E. +2 more
core +1 more source
, 2005 Optical vortices generically arise when optical beams are combined. Recently, we reported how several laser beams containing optical vortices could be combined to form optical vortex loops, links and knots embedded in a light beam (Leach et al 2004 ...
Dennis, MR +13 more
core +1 more source
Broadband Transparent Absorber Based on Indium Tin Oxide-Polyethylene Terephthalate Film
IEEE Access, 2019 In this paper, a broadband transparent microwave absorber with a fractional bandwidth of 118.1% was designed. In the proposed absorber, a gear-shaped unit cell consisting of optically transparent indium tin oxide-polyethylene terephthalate films ...
Lin Zhang +4 more
doaj +1 more source
Alexandria Engineering Journal, 2022 A dual-flexible manipulator with a telescopic arm is affected by joint flexibility, load flexibility, and bearing friction, which will cause angular velocity fluctuation.
Dongyang Shang +3 more
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Applied SciencesThis paper presents a novel ultrathin frequency selective surface (FSS) bandpass filter with an extraordinary wideband tailored for operating within the S-C bands. The filter structure entails a double-layer FSS structure with mutually perpendicular unit
Francesca Pascarella +2 more
doaj +1 more source