Results 81 to 90 of about 23,945,233 (235)
Quantum Uncertainty Considerations for Gravitational Lens Interferometry
, 2008 The measurement of the gravitational lens delay time between light paths has relied, to date, on the source having sufficient variability to allow photometric variations from each path to be compared. However, the delay times of many gravitational lenses
Carico, David P., Doyle, Laurance R.
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Generalized definition of time delay in scattering theory
, 2006 We advocate for the systematic use of a symmetrized definition of time delay in scattering theory. In two-body scattering processes, we show that the symmetrized time delay exists for arbitrary dilated spatial regions symmetric with respect to the origin.
Amrein W. O. +6 more
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Time Delay in Swiss Cheese Gravitational Lensing
, 2010 We compute time delays for gravitational lensing in a flat LambdaCDM Swiss cheese universe. We assume a primary and secondary pair of light rays are deflected by a single point mass condensation described by a Kottler metric (Schwarzschild with Lambda ...
Chen, Bin, Dai, Xinyu, Kantowski, Ronald
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, 2015 The initial insight into time delay in Mn photoionization in the region of the $3p \to 3d$ giant autoionization resonance is gained in the framework of the "spin-polarized" random phase approximation with exchange.
Deshmukh, P. C. +3 more
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, 2015 COSMOGRAIL is a long-term photometric monitoring of gravitationally lensed QSOs aimed at implementing Refsdal's time-delay method to measure cosmological parameters, in particular H0. Given long and well sampled light curves of strongly lensed QSOs, time-
Bonvin, V. +5 more
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Time-Delayed Quantum Feedback Control [PDF]
Physical Review Letters, 2015 A theory of time-delayed coherent quantum feedback is developed. More specifically, we consider a quantum system coupled to a bosonic reservoir creating a unidirectional feedback loop. It is shown that the dynamics can be mapped onto a fictitious series of cascaded quantum systems, where the system is driven by past versions of itself.
openaire +3 more sources
IEEE AccessIn real-world applications, time delays and uncertain nonlinearities are inevitable and impose significant challenges in modern control systems. The uncertainties commonly include nonlinear backlash-like hysteresis, external disturbances, parameter ...
Syeda Nadiah Fatima Nahri +5 more
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Time Delay Estimation Algoritms for Echo Cancellation
Advances in Electrical and Electronic Engineering, 2011 The following case study describes how to eliminate echo in a VoIP network using delay estimation algorithms. It is known that echo with long transmission delays becomes more noticeable to users.
Kirill Sakhnov +2 more
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On Delay-independent Stability of a class of Nonlinear Positive Time-delay Systems
, 2013 We present a condition for delay-independent stability of a class of nonlinear positive systems. This result applies to systems that are not necessarily monotone and extends recent work on cooperative nonlinear systems.Comment: 9 ...
Bokharaie, Vahid, Mason, Oliver
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New Stability Criterion for Continuous-Time Takagi–Sugeno Fuzzy Systems With Time-Varying Delay
IEEE Transactions on Cybernetics, 2019 In this technical paper, a new Lyapunov–Krasovskii functional (LKF) is designed to study the stability of continuous-time Takagi–Sugeno fuzzy systems with time-varying delay.
Likui Wang, H. Lam
semanticscholar +1 more source