Results 31 to 40 of about 3,226,193 (375)
Analog of a Quantum Heat Engine Using a Single-Spin Qubit. [PDF]
Physical Review Letters, 2020 A quantum two-level system with periodically modulated energy splitting could provide a minimal universal quantum heat machine. We present the experimental realization and the theoretical description of such a two-level system as an impurity electron ...
K. Ono +4 more
semanticscholar +1 more source
Autonomous circular heat engine [PDF]
Physical Review E, 2022 A dynamical model of a highly efficient heat engine is proposed, where an applied temperature difference maintains the motion of particles around the circuit consisting of two asymmetric narrow channels, in one of which the current flows against the applied thermodynamic forces.
Giuliano Benenti +3 more
openaire +6 more sources
Investigation of effect of heat exchanger size on power output in low-temperature difference Stirling engines [PDF]
E3S Web of Conferences, 2021 The Stirling engine is capable of converting any source of thermal energy into kinetic energy, which makes it an attractive option for utilizing low-temperature sources such as geothermal or waste heat below 100 °C.
Hasanovich Linda, Nobes David
doaj +1 more source
Optimization of an active heat engine [PDF]
Physical Review E, 2021 Optimisation of heat engines at the micro-scale has applications in biological and artificial nano-technology, and stimulates theoretical research in non-equilibrium statistical physics. Here we consider non-interacting overdamped particles confined by an external harmonic potential, in contact either with a thermal reservoir or with a stochastic self ...
Gronchi G, Puglisi A
openaire +3 more sources
Finite-time quantum Stirling heat engine [PDF]
New Journal of Physics, 2020 We study the thermodynamic performance of a finite-time non-regenerative quantum Stirling-like cycle used as a heat engine. We consider specifically the case in which the working substance (WS) is a two-level system (TLS).
S. Raja +4 more
semanticscholar +1 more source
Optimal operation of a three-level quantum heat engine and universal nature of efficiency [PDF]
Physical Review Research, 2020 We present a detailed study of a three-level quantum heat engine operating at maximum efficient power function, a trade-off objective function defined by the product of the efficiency and power output of the engine. First, for near equilibrium conditions,
Varinder Singh
semanticscholar +1 more source
Semi‐supervised classification of fundus images combined with CNN and GCN
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Purpose Diabetic retinopathy (DR) is one of the most serious complications of diabetes, which is a kind of fundus lesion with specific changes. Early diagnosis of DR can effectively reduce the visual damage caused by DR. Due to the variety and different morphology of DR lesions, automatic classification of fundus images in mass screening can ...
Sixu Duan +8 more
wiley +1 more source
Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022 Abstract Positron emission tomography with x‐ray computed tomography (PET/CT) is increasingly being utilized for radiation treatment planning (RTP). Accurate delivery of RT therefore depends on quality PET/CT data. This study covers quality control (QC) procedures required for PET/CT for diagnostic imaging and incremental QC required for RTP.
Ran Klein +7 more
wiley +1 more source
Geometrical formulation of adiabatic pumping as a heat engine [PDF]
, 2020 We investigate a heat engine under an adiabatic (Thouless) pumping process. In this process, the extracted work and lower bound on dissipated availability are characterized by a vector potential and a Riemannian metric, respectively.
Y. Hino, H. Hayakawa
semanticscholar +1 more source