Results 21 to 30 of about 329,485 (247)

Influence of Joint Stiffness and Motion Time on the Trajectories of Underactuated Robots

open access: yesApplied Sciences, 2023
Underactuated robots have fewer actuators than degrees of freedom (DOF). Nonactuated joints can be equipped with torsional springs. Underactuated robots can be controlled in a point-to-point motion if they have a particular mass distribution that makes ...
Michele Tonan   +3 more
doaj   +1 more source

Entangling the motion of two optically trapped objects via time-modulated driving fields [PDF]

open access: yes, 2014
We study entanglement of the motional degrees of freedom of two tethered and optically trapped microdisks inside a single cavity. By properly choosing the position of the trapped objects in the optical cavity and driving proper modes of the cavity it is ...
Abdi, Mehdi, Hartmann, Michael J.
core   +2 more sources

Joint Motion Estimation and Layer Segmentation in Transparent Image Sequences—Application to Noise Reduction in X-Ray Image Sequences

open access: yesEURASIP Journal on Advances in Signal Processing, 2009
This paper is concerned with the estimation of the motions and the segmentation of the spatial supports of the different layers involved in transparent X-ray image sequences.
Jean Liénard   +2 more
doaj   +1 more source

Quantum dynamics of a driven parametric oscillator in a Kerr medium

open access: yesScientific Reports, 2023
In this paper, we first analyze a parametric oscillator with both mass and frequency time-dependent. We show that the evolution operator can be obtained from the evolution operator of another parametric oscillator with a constant mass and time-dependent ...
E. Bolandhemmat, F. Kheirandish
doaj   +1 more source

Cooling of a levitated nanoparticle with digital parametric feedback

open access: yes, 2019
The motion control of a levitated nanoparticle plays a central role in optical levitation for fundamental studies and practical applications. Here, we presented a digital parametric feedback cooling based on switching between two trapping laser intensity
Guo, Guang-Can, Sun, Fang-Wen, Zheng, Yu
core   +1 more source

Mobility of Discrete Solitons in Quadratically Nonlinear Media [PDF]

open access: yes, 2006
We study the mobility of solitons in second-harmonic-generating lattices. Contrary to what is known for their cubic counterparts, discrete quadratic solitons are mobile not only in the one-dimensional (1D) setting, but also in two dimensions (2D).
B. A. Malomed   +8 more
core   +3 more sources

On the influence of noise on chaos in nearly Hamiltonian systems

open access: yes, 2003
The simultaneous influence of small damping and white noise on Hamiltonian systems with chaotic motion is studied on the model of periodically kicked rotor. In the region of parameters where damping alone turns the motion into regular, the level of noise
A.B. Rechester   +18 more
core   +1 more source

Translational Motion Compensation of Space Micromotion Targets Using Regression Network

open access: yesIEEE Access, 2019
The high-speed translational motion of space targets will cause the micro-Doppler to shift, tilt, and fold, which brings great difficulty to the extraction of micromotion features.
Yizhe Wang   +3 more
doaj   +1 more source

Backlund transformations and Hamiltonian flows

open access: yes, 2013
In this work we show that, under certain conditions, parametric Backlund transformations (BTs) for a finite dimensional integrable system can be interpreted as solutions to the equations of motion defined by an associated non-autonomous Hamiltonian.
Bobenko A I   +8 more
core   +1 more source

Eigenspace-Based Motion Compensation for ISAR Target Imaging

open access: yesEURASIP Journal on Advances in Signal Processing, 2006
A novel motion compensation technique is presented for the purpose of forming focused ISAR images which exhibits the robustness of parametric methods but overcomes their convergence difficulties.
Yau D, Berry PE, Haywood B
doaj   +1 more source

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