26,673 research outputs found
A Discriminatively Learned CNN Embedding for Person Re-identification
We revisit two popular convolutional neural networks (CNN) in person
re-identification (re-ID), i.e, verification and classification models. The two
models have their respective advantages and limitations due to different loss
functions. In this paper, we shed light on how to combine the two models to
learn more discriminative pedestrian descriptors. Specifically, we propose a
new siamese network that simultaneously computes identification loss and
verification loss. Given a pair of training images, the network predicts the
identities of the two images and whether they belong to the same identity. Our
network learns a discriminative embedding and a similarity measurement at the
same time, thus making full usage of the annotations. Albeit simple, the
learned embedding improves the state-of-the-art performance on two public
person re-ID benchmarks. Further, we show our architecture can also be applied
in image retrieval
The triangle-free graphs with rank 6
The rank of a graph G is defined to be the rank of its adjacency matrix A(G).
In this paper we characterize all connected triangle-free graphs with rank 6
A Green's function formalism of energy and momentum transfer in fluctuational electrodynamics
Radiative energy and momentum transfer due to fluctuations of electromagnetic
fields arising due to temperature difference between objects is described in
terms of the cross-spectral densities of the electromagnetic fields. We derive
relations between thermal non-equilibrium contributions to energy and momentum
transfer and surface integrals of tangential components of the dyadic Green's
functions of the vector Helmholtz equation. The expressions derived here are
applicable to objects of arbitrary shapes, dielectric functions, as well as
magnetic permeabilities. For the case of radiative transfer, we derive
expressions for the generalized transmissivity and generalized conductance that
are shown to obey reciprocity and agree with theory of black body radiative
transfer in the appropriate limit.Comment: 12 pages, 2 figure
Lifshitz theory of van der Waals pressure in dissipative media
We derive a first--principles method of determining the van der Waals or
Casimir pressure in a dissipative and dispersive planar multilayered system by
calculating the Maxwell stress tensor in a fictitious layer of vacuum, that is
eventually made to vanish, introduced in the structure. This is illustrated by
calculating the van der Waals pressure in a thin film with dissipative
properties embedded between two semi--infinite media.Comment: 4 pages, 2 figure
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