12,997 research outputs found
Coulomb-coupled quantum-dot thermal transistors
A quantum-dot thermal transistor consisting of three Coulomb-coupled quantum
dots coupled to respective electronic reservoirs by tunnel contacts is
established. The heat flows through the collector and emitter can be controlled
by the temperature of the base. It is found that a small change in the base
heat flow can induce a large heat flow change in the collector and emitter. The
huge amplification factor can be obtained by optimizing the Coulomb interaction
between the collector and the emitter or by decreasing the energy-dependent
tunneling rate at the base. The proposed quantum-dot thermal transistor may
open up potential applications in low-temperature solid-state thermal circuits
at the nanoscale.Comment: 14 pages, 6 figure
3D Multiple Object Tracking on Autonomous Driving: A Literature Review
3D multi-object tracking (3D MOT) stands as a pivotal domain within
autonomous driving, experiencing a surge in scholarly interest and commercial
promise over recent years. Despite its paramount significance, 3D MOT confronts
a myriad of formidable challenges, encompassing abrupt alterations in object
appearances, pervasive occlusion, the presence of diminutive targets, data
sparsity, missed detections, and the unpredictable initiation and termination
of object motion trajectories. Countless methodologies have emerged to grapple
with these issues, yet 3D MOT endures as a formidable problem that warrants
further exploration. This paper undertakes a comprehensive examination,
assessment, and synthesis of the research landscape in this domain, remaining
attuned to the latest developments in 3D MOT while suggesting prospective
avenues for future investigation. Our exploration commences with a systematic
exposition of key facets of 3D MOT and its associated domains, including
problem delineation, classification, methodological approaches, fundamental
principles, and empirical investigations. Subsequently, we categorize these
methodologies into distinct groups, dissecting each group meticulously with
regard to its challenges, underlying rationale, progress, merits, and demerits.
Furthermore, we present a concise recapitulation of experimental metrics and
offer an overview of prevalent datasets, facilitating a quantitative comparison
for a more intuitive assessment. Lastly, our deliberations culminate in a
discussion of the prevailing research landscape, highlighting extant challenges
and charting possible directions for 3D MOT research. We present a structured
and lucid road-map to guide forthcoming endeavors in this field.Comment: 24 pages, 6 figures, 2 table
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