2,495 research outputs found
EWA Model with Recency Effect and Limited Memory
Game theory is an important field in economics; it studies how people make decisions amid conflict and cooperation. Various experiments have been carried to study the way people play those games, and economists study those data for various purposes. There has been a rise of need for using artificial agents to simulate the game, since we could save the cost of hiring human subjects for the experiments, and we could gain more control over the experiment settings
Angular Position Sensor Based on Anisotropic Magnetoresistive and Anomalous Nernst Effect
Magnetic position sensors find extensive applications in various industrial
sectors and consumer products. However, measuring angles in the full range of
0{\deg} to 360{\deg} in a wide field range using a single magnetic sensor
remains a challenge. Here, we propose a magnetic position sensor based on a
single Wheatstone bridge structure made from a single ferromagnetic layer. By
measuring the anisotropic magnetoresistance (AMR) signal from the bridge and
two sets of anomalous Nernst effect (ANE) signals from the transverse ports on
two perpendicular Wheatstone bridge arms concurrently, we show that it is
possible to achieve 0{\deg} to 360{\deg} angle detection using a single bridge
sensor. The combined use of AMR and ANE signals allows to achieve a mean angle
error in the range of 0.51{\deg} to 1.05{\deg} within a field range of 100 Oe
to 10,000 Oe.Comment: 12 pages, 10 figure
Steady and dynamic magnetic phase transitions in interacting quantum dots arrays coupled with leads
We apply the Hubbard model, non-equilibrium Green's function (NEGF) theory,
exact diagonalization (ED) and the hierarchical equations of motion (HEOM)
method to investigate abundant magnetic phase transitions in the 1D interacting
quantum dots arrays (QDA) sandwiched by non-interaction leads. The spin
polarization phase transitions are firstly studied with a mean-field
approximation. The many-body calculation of the ED method is then used to
verify such transitions. We find with the weak device-leading couplings, the
anti-ferromagnetic (AF) state only exists in the uniform odd-numbered QDA or
the staggered-hopping QDA systems. With increasing the coupling strength or the
bias potentials, there exists the magnetism-to non-magnetism phase transition.
With the spin-resolved HEOM method we also investigate the detailed dynamic
phase transition process of these lead-QDA-lead systems.Comment: 17 pages, 6 figure
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