14,276 research outputs found
A Conditional Adversarial Network for Scene Flow Estimation
The problem of Scene flow estimation in depth videos has been attracting
attention of researchers of robot vision, due to its potential application in
various areas of robotics. The conventional scene flow methods are difficult to
use in reallife applications due to their long computational overhead. We
propose a conditional adversarial network SceneFlowGAN for scene flow
estimation. The proposed SceneFlowGAN uses loss function at two ends: both
generator and descriptor ends. The proposed network is the first attempt to
estimate scene flow using generative adversarial networks, and is able to
estimate both the optical flow and disparity from the input stereo images
simultaneously. The proposed method is experimented on a large RGB-D benchmark
sceneflow dataset
Combinatorial proofs of the Newton-Girard and Chapman-Costas-Santos identities
In this paper we give combinatorial proofs of some well known identities and
obtain some generalizations. We give a visual proof of a result of Chapman and
Costas-Santos regarding the determinant of sum of matrices. Also we find a new
identity expressing permanent of sum of matrices. Besides, we give a graphical
interpretation of Newton-Girard identity.Comment: 6 pages, 1 figur
Agent based decision making for Integrated Air Defense system
This paper presents algorithms of decision making agents for an integrated
air defense (IAD) system. The advantage of using agent based over conventional
decision making system is its ability to automatically detect and track targets
and if required allocate weapons to neutralize threat in an integrated mode.
Such approach is particularly useful for futuristic network centric warfare.
Two agents are presented here that perform the basic decisions making tasks of
command and control (C2) like detection and action against jamming, threat
assessment and weapons allocation, etc. The belief-desire-intension (BDI)
architectures stay behind the building blocks of these agents. These agents
decide their actions by meta level plan reasoning process. The proposed agent
based IAD system runs without any manual inputs, and represents a state of art
model for C2 autonomy.Comment: 8 pages,9 figure,2 table
The Role of Boolean Function in Fractal Formation and it s Application to CDMA Wireless Communication
In this paper, a new transformation is generated from a three variable
Boolean function 3, which is used to produce a self-similar fractal pattern of
dimension 1.58. This very fractal pattern is used to reconstruct the whole
structural position of resources in wireless CDMA network. This reconstruction
minimizes the number of resources in the network and so naturally network
consumption costs are getting reduced. Now -a -days resource controlling and
cost minimization are still a severe problem in wireless CDMA network. To
overcome this problem fractal pattern produced in our research provides a
complete solution of structural position of resources in this Wireless CDMA
Network.Comment: 8 pages, 14 figure
Influence of substrate interaction and confinement on electric field induced transition in symmetric block copolymer thin films
In the present work, we study morphologies arising due to competing substrate
interaction, electric field and confinement effects on a symmetric diblock
copolymer. We employ a coarse grained non-local Cahn-Hilliard phenomenological
model taking into account the appropriate contributions of substrate
interaction and electrostatic field. The proposed model couples the
Ohta-Kawasaki functional with Maxwell equation of electrostatics, thus
alleviating the need for any approximate solution used in previous studies. We
calculate the phase diagram in electric field-substrate strength space for
different film thicknesses. In addition to identifying the presence of
parallel, perpendicular and mixed lamellae phases similar to analytical
calculations, we also find a region in the phase diagram where hybrid
morphologies (combination of two phases) coexist. These hybrid morphologies
arise either solely due to substrate affinity and confinement or are induced
due to the applied electric field. The dependence of the critical fields for
transition between the various phases on substrate strength, film thickness and
dielectric contrast is discussed. Some preliminary 3D results are also
presented to corroborate the presence of hybrid morphologies.Comment: 13 figures, 18 pages, Physical Review E, 201
An elementary proof of a conjecture on graph-automorphism
In this article, we give an elementary combinatorial proof of a conjecture
about the determination of automorphism group of the power graph of finite
cyclic groups, proposed by Doostabadi, Erfanian and Jafarzadeh in 2013.Comment: 5 page
Analysis and comparative study of non-holonomic and quasi-integrable deformations of the Nonlinear Schr\"odinger Equation
The non-holonomic deformation of the nonlinear Schr\"odinger equation,
uniquely obtained from both the Lax pair and Kupershmidt's bi-Hamiltonian
[Phys. Lett. A 372, 2634 (2008)] approaches, is compared with the
quasi-integrable deformation of the same system [Ferreira et. al. JHEP 2012,
103 (2012)]. It is found that these two deformations can locally coincide only
when the phase of the corresponding solution is discontinuous in space,
following a definite phase-modulus coupling of the non-holonomic inhomogeneity
function. These two deformations are further found to be not gauge-equivalent
in general, following the Lax formalism of the nonlinear Schr\"odinger
equation. However, asymptotically they converge for localized solutions as
expected. Similar conditional correspondence of nonholonomic deformation with a
non-integrable deformation, namely, due to local scaling of the amplitude of
the nonlinear Schr\"odinger equation is further obtained.Comment: 15 pages, 2 figures, extended result
Study of quasi-integrable and non-holonomic deformation of equations in the NLS and DNLS hierarchy
The hierarchy of equations belonging to two different but related integrable
systems, the Nonlinear Schr\"odinger and its derivative variant, DNLS are
subjected to two distinct deformation procedures, viz. quasi-integrable
deformation (QID) that generally do not reserve the integrability, only
asymptotically integrable, and non-holonomic deformation (N HD) that does. QID
is carried out generically for the NLS hierarchy while for the DNLS hierarchy,
it is first done on the Kaup-Newell system followed by other members of the
family. No QI anomaly is observed at the level of EOMs which suggests that at
that level the QID may be identified as some integrable deformation. NHD is
applied to the NLS hierarchy generally as well as with the specific focus on
the NLS equation itself and the coupled KdV type NLS equation. For the DNLS
hierarchy, the Kaup-Newell(KN) and Chen-Lee-Liu (CLL) equations are deformed
non-holonomically and subsequently, different aspects of the results are
discussed.Comment: 25 pages. arXiv admin note: text overlap with arXiv:1311.433
F0 Modeling In Hmm-Based Speech Synthesis System Using Deep Belief Network
In recent years multilayer perceptrons (MLPs) with many hid- den layers Deep
Neural Network (DNN) has performed sur- prisingly well in many speech tasks,
i.e. speech recognition, speaker verification, speech synthesis etc. Although
in the context of F0 modeling these techniques has not been ex- ploited
properly. In this paper, Deep Belief Network (DBN), a class of DNN family has
been employed and applied to model the F0 contour of synthesized speech which
was generated by HMM-based speech synthesis system. The experiment was done on
Bengali language. Several DBN-DNN architectures ranging from four to seven
hidden layers and up to 200 hid- den units per hidden layer was presented and
evaluated. The results were compared against clustering tree techniques pop-
ularly found in statistical parametric speech synthesis. We show that from
textual inputs DBN-DNN learns a high level structure which in turn improves F0
contour in terms of ob- jective and subjective tests.Comment: OCOCOSDA 201
Test map and Discreteness in SL(2, )
Let SL(2, ) be the group of quaternionic matrices
with quaternionic determinant
. This group acts by the orientation-preserving
isometries of the five dimensional (real) hyperbolic space. We obtain
discreteness criteria for Zariski-dense subgroups of SL(2, ) using
test maps.Comment: minor revision
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