3,884 research outputs found
Distinguishability and indistinguishability by LOCC
We show that a set of linearly independent quantum states , where are
generalized Pauli matrices, cannot be discriminated deterministically or
probabilistically by local operations and classical communications (LOCC). On
the other hand, any maximally entangled states from this set are locally
distinguishable if . The explicit projecting measurements are
obtained to locally discriminate these states. As an example, we show that four
Werner states are locally indistinguishable.Comment: 5 page
Nonconcave penalized likelihood with a diverging number of parameters
A class of variable selection procedures for parametric models via nonconcave
penalized likelihood was proposed by Fan and Li to simultaneously estimate
parameters and select important variables. They demonstrated that this class of
procedures has an oracle property when the number of parameters is finite.
However, in most model selection problems the number of parameters should be
large and grow with the sample size. In this paper some asymptotic properties
of the nonconcave penalized likelihood are established for situations in which
the number of parameters tends to \infty as the sample size increases.
Under regularity conditions we have established an oracle property and the
asymptotic normality of the penalized likelihood estimators. Furthermore, the
consistency of the sandwich formula of the covariance matrix is demonstrated.
Nonconcave penalized likelihood ratio statistics are discussed, and their
asymptotic distributions under the null hypothesis are obtained by imposing
some mild conditions on the penalty functions
Erratum: Dynamics of the Bounds of Squared Concurrence [Phys. Rev. A 79, 032306 (2009)]
This is an erratum to our paper.Comment: a little different from the published versio
SANet: Structure-Aware Network for Visual Tracking
Convolutional neural network (CNN) has drawn increasing interest in visual
tracking owing to its powerfulness in feature extraction. Most existing
CNN-based trackers treat tracking as a classification problem. However, these
trackers are sensitive to similar distractors because their CNN models mainly
focus on inter-class classification. To address this problem, we use
self-structure information of object to distinguish it from distractors.
Specifically, we utilize recurrent neural network (RNN) to model object
structure, and incorporate it into CNN to improve its robustness to similar
distractors. Considering that convolutional layers in different levels
characterize the object from different perspectives, we use multiple RNNs to
model object structure in different levels respectively. Extensive experiments
on three benchmarks, OTB100, TC-128 and VOT2015, show that the proposed
algorithm outperforms other methods. Code is released at
http://www.dabi.temple.edu/~hbling/code/SANet/SANet.html.Comment: In CVPR Deep Vision Workshop, 201
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