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Results for "Vahid Towhidlou"

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A Neural Network Prediction Based Adaptive Mode Selection Scheme in Full-Duplex Cognitive NetworksApr 12 2019We propose a neural network (NN) predictor and an adaptive mode selection scheme for the purpose of both improving secondary user's (SU's) throughput and reducing collision probability to the primary user (PU) in full-duplex (FD) cognitive networks. SUs ... More
Cross-layer Design in Cognitive Radio StandardsNov 26 2017The growing demand for wireless applications and services on the one hand, and limited available radio spectrum on the other hand have made cognitive radio (CR) a promising solution for future mobile networks. It has attracted considerable attention by ... More
Adaptive Full Duplex Communications in Cognitive Radio NetworksOct 16 2017In this paper we propose a novel adaptive scheme for full duplex communication of secondary users (SUs) in a cognitive radio network. The secondary network operates in three modes; Cooperative Sensing (CS), Full Duplex Transmit and Sensing (FDTS), and ... More
Computational Machines in a Coexistence with Concrete Universals and Data StreamsSep 10 2017We discuss that how the majority of traditional modeling approaches are following the idealism point of view in scientific modeling, which follow the set theoretical notions of models based on abstract universals. We show that while successful in many ... More
Using quantum friction to synchronize rotating bodiesJul 14 2016Proposing a combined system of a nanoparticle and a plane surface in the presence of electromagnetic vacuum fluctuations, the electromagnetic and medium fields have been quantized. Quantum friction of nanoparticle due to the presence of plane surface ... More
On the precession of the isolated pulsar PSR B1828-11May 13 2002Nov 18 2002Analysis of both pulse timing and pulse shape variations of the isolated pulsar PSR B1828-11 shows highly correlated and strong Fourier power at periods \~ 1000, 500, and 250 d (Stairs et al. 2000). The only description based on a free precession of star's ... More
Large frequency drifts during Type I X-ray burstsApr 08 2003May 21 2003We study the spin-down of a neutron star atmosphere during the Type I X-ray burst in low mass X-ray binaries. Using polar cap acceleration models, we show that the resulting stellar ``wind'' torque on the burning shell due to the flowing charged particles ... More
Bicovariant Differential Geometry of the Quantum Group $SL_h(2)$Apr 18 1994Oct 10 1994There are only two quantum group structures on the space of two by two unimodular matrices, these are the $SL_q(2)$ and the $SL_h(2)$ [9-13] quantum groups. One can not construct a differential geometry on $ SL_q(2)$, which at the same time is bicovariant, ... More
Nonlinear Fourier Transform of Truncated Multi-Soliton PulsesDec 05 2018Multi-soliton pulses, as special solutions of the Nonlinear Schroedinger Equation (NLSE), are potential candidates for optical fiber transmission where the information is modulated and recovered in the so-called nonlinear Fourier domain. For data communication, ... More
Length functions and property (RD) for locally compact Hecke pairsDec 03 2014The purpose of this paper is to study property (RD) for locally compact Hecke pairs. We discuss length functions on Hecke pairs and the growth of Hecke pairs. We establish an equivalence between property (RD) of locally compact groups and property (RD) ... More
Non-minimal Higgs inflation in the context of warm scenario in the light of Planck dataNov 27 2018We investigate the non-minimally Higgs inflaton (HI) model in the context of warm inflation scenario. Warm little inflaton (WLI) model considers the little Higgs boson as inflaton. The concerns of warm inflation model can be eliminated in WLI model. There ... More
Warm (Pseudo)Scalar InflationJan 07 2019In this note, we will introduce an action for warm inflation model with direct coupling between the pseudoscalar field and mass-less $SU(2)$ gauge fields. The potential of inflaton is protected against the thermal corrections in a thermal bath of gauge ... More
Reheating After Swampland ConjectureFeb 02 2019Swampland conjecture is in contrast with effective thermal field theory of reheating epoch. The effective potential of the scalar field, which is firstly responsible for the accelerated expansion of the universe, at the reheating epoch with temperature ... More
Urban morphology meets deep learning: Exploring urban forms in one million cities, town and villages across the planetSep 09 2017Sep 12 2017Study of urban form is an important area of research in urban planning/design that contributes to our understanding of how cities function and evolve. However, classical approaches are based on very limited observations and inconsistent methods. As an ... More
An erratum to "Property (RD) for Hecke pairs"Dec 11 2012Dec 12 2012We correct an error in the article "Property (RD) for Hecke pairs".
The quantum de Rham complexes associated with $SL_h(2)$May 24 1993Jun 12 1993Quantum de Rham complexes on the quantum plane and the quantum group itself are constructed for the Zakrewski deformation of $ Fun ( SL(2)) $. As a by-product a new deformation of the two dimensional Heisenberg algeb ra is constructed which can be used ... More
Representations of The Coordinate Ring of $GL_{q}(3)$May 19 1993Jun 12 1993It is shown that the finite dimensional ireducible representations of the quantum matrix algebra $ M_q(3) $ ( the coordinate ring of $ GL_q(3) $ ) exist only when q is a root of unity ( $ q^p = 1 $ ). The dimensions of these representations can only be ... More
Various commensurability relations in Hecke pairs and property (RD)May 13 2012Dec 12 2012In this paper we continue our study of property (RD) for Hecke pairs initiated in (V. Shirbisheh, Property (RD) for Hecke pairs. Mathematical Physics, Analysis and Geometry, vol. 15, no. 2, (2012), 173--192). We study the behavior of property (RD) under ... More
Deforestation Prediction Using Neural Networks and Satellite Imagery in a Spatial Information SystemMar 07 2018Dec 25 2018Deforestation, as one of the challenging environmental problems in the world, has been recorded the most serious threat to environmental diversity and one of the main components of land-use change. In this paper, we investigate spatial distribution of ... More
Capacity Results for Intermittent X-Channels with Delayed Channel State FeedbackJan 09 2018Apr 09 2019We characterize the capacity region of noiseless X-Channels with intermittent connectivity and delayed channel state information at the transmitters. We consider the general case in which each transmitter has a common message for both receivers and a ... More
Reasoning with shapes: profiting cognitive susceptibilities to infer linear mapping transformations between shapesSep 01 2017Visual information plays an indispensable role in our daily interactions with environment. Such information is manipulated for a wide range of purposes spanning from basic object and material perception to complex gesture interpretations. There have been ... More
Bayesian Analysis of Censored Spatial Data Based on a Non-Gaussian ModelJun 18 2017Nov 27 2018In this paper, we suggest using a skew Gaussian-log Gaussian model for the analysis of spatial censored data from a Bayesian point of view. This approach furnishes an extension of the skew log Gaussian model to accommodate to both skewness and heavy tails ... More
Gait Pattern Recognition Using AccelerometersMar 11 2017Motion ability is one of the most important human properties, including gait as a basis of human transitional movement. Gait, as a biometric for recognizing human identities, can be non-intrusively captured signals using wearable or portable smart devices. ... More
Urban Data Streams and Machine Learning: A Case of Swiss Real Estate MarketMar 30 2017In this paper, we show how using publicly available data streams and machine learning algorithms one can develop practical data driven services with no input from domain experts as a form of prior knowledge. We report the initial steps toward development ... More
Quantum Statistical Mechanics of $\mathbb{Q}$-lattices and noncommutative geometryAug 13 2008Aug 21 2008After recalling some basic notions of quantum statistical mechanics, we explain the Bost-Connes system that relates the structure of the maximal abelian extension of $\mathbb{Q}$ to the space of \kms states of a \cs-dynamical system. Afterwards, we study ... More
A relative version of Kummer theoryAug 13 2008Let $E/F$ be a cyclic Galois extension of degree $p^l$ with Galois group $G$. It is shown that the Galois module structure of both sides of the Kummer pairing (for Kummer extensions of $E$) are the same. In other words, we show that the Kummer duality ... More
Amenability of Hecke pairs and a question of EymardNov 11 2013Feb 23 2014In this short paper we show that if $(G,H)$ is an amenable Hecke pair and $\Gamma$ is a subgroup of $G$ containing $H$, then the Hecke pair $(\Gamma, H)$ is amenable too. This answers positively a question of Pierre Eymard, asked in 1972, when it is restricted ... More
R-modes in the ocean of a magnetic neutron starFeb 05 2002Apr 09 2002We study the dynamics of r-modes in the ocean of a magnetic neutron star. We modeled the star's ocean with a spherical rotating thin shell and assumed that the magnetic field symmetry axis is not aligned to the shell's spin axis. In the magnetohydrodynamic ... More
Property (RD) for Hecke pairsMar 28 2012May 15 2012As the first step towards developing noncommutative geometry over Hecke C*-algebras, we study property (RD) (Rapid Decay) for Hecke pairs. When the subgroup H in a Hecke pair (G,H) is finite, we show that the Hecke pair (G,H) has (RD) if and only if G ... More
A new algorithm for mixed equilibrium problem and Bregman strongly nonexpansive mappings in Banach spacesDec 01 2015In this paper, we study a new iterative method for a common fixed point of a finite family of Bregman strongly nonexpansive mappings in the frame work of reflexive real Banach spaces. Moreover, we prove the strong convergence theorem for finding common ... More
Grand Technologies for Grand Energy Challenges: A Futuristic Scenario for Solar Energy in the Age of InformationAug 22 2017Instead of getting involved in either extremes of dispute around climate change as one of our grand challenges, we opened the space of potential policy responses from a systemic view and showed why current climate change mitigation policies are not successful ... More
Control and Detection of Discrete Spectral Amplitudes in Nonlinear Fourier SpectrumMay 18 2016Nonlinear Fourier division Multiplexing (NFDM) can be realized from modulating the discrete nonlinear spectrum of an $N$-solitary waveform. To generate an $N$-solitary waveform from desired discrete spectrum (eigenvalue and discrete spectral amplitudes), ... More
Algorithm and Related Application for Smart Wearable Devices to Reduce the Risk of Death and Brain Damage in Diabetic ComaOct 08 2015Diabetes is an epidemic disease of the 21st century and is growing globally. Although, final diabetes treatments and cure are still on research phase, related complications of diabetes endanger life of diabetic patients. Diabetic coma which happens with ... More
Locally compact Hecke pairsFeb 11 2014Dec 13 2014We introduce an extended setting to study Hecke pairs $(G,H)$ which admit a regular representation on $L^2(H\backslash G)$, and consequently a $C^*$-algebra. As the result, many pairs of locally compact groups which had been studied in noncommutative ... More
A complete characterization of the spectrum of the Kitaev model on spin laddersApr 22 2009Apr 30 2009We study the Kitaev model on a ladder network and find the complete spectrum of the Hamiltonian in closed form. Closed and manageable forms for all eigenvalues and eigenvectors, allow us to calculate the partition function and averages of non-local operators ... More
Lectures on C*-algebrasNov 14 2012The following topics are presented in these notes: Elements of Banach algebras, Banach algebras of the form $L^1(G)$, where $G$ is a locally compact group, spectrum of elements of Banach algebras, the spectral theory of compact operators on Banach spaces, ... More
Cyber-Physical Attacks on UAS Networks- Challenges and Open Research ProblemsFeb 04 2017Assignment of critical missions to unmanned aerial vehicles (UAV) is bound to widen the grounds for adversarial intentions in the cyber domain, potentially ranging from disruption of command and control links to capture and use of airborne nodes for kinetic ... More
Computing With Contextual NumbersAug 05 2014Aug 06 2014Self Organizing Map (SOM) has been applied into several classical modeling tasks including clustering, classification, function approximation and visualization of high dimensional spaces. The final products of a trained SOM are a set of ordered (low dimensional) ... More
General Reaction-Diffusion Processes With Separable Equations for Correlation FunctionsApr 20 2002May 24 2002We consider general multi-species models of reaction diffusion processes and obtain a set of constraints on the rates which give rise to closed systems of equations for correlation functions. Our results are valid in any dimension and on any type of lattice. ... More
Representations of The Coordinate Ring of $ GL_{q}(n) $}Jun 12 1993It is shown that the finite dimensional irreducible representations of the quantum matrix algebra $ M_q(n) $ ( the coordinate ring of $ GL_q(n) $ ) exist only when q is a root of unity ( $ q^p = 1 $ ). The dimensions of these representations can only ... More
Q-Boson Representation of the Quantum Matrix Algebra $M_q(3)$May 19 1993Jun 12 1993{Although q-oscillators have been used extensively for realization of quantum universal enveloping algebras,such realization do not exist for quantum matrix algebras ( deformation of the algebra of functions on the group ). In this paper we first construct ... More
On an Extension of Stochastic Approximation EM Algorithm for Incomplete Data ProblemsNov 21 2018Nov 28 2018The Stochastic Approximation EM (SAEM) algorithm, a variant stochastic approximation of EM, is a versatile tool for inference in incomplete data models. In this paper, we review the fundamental EM algorithm and then focus especially on the stochastic ... More
Uniform limit theorems under random truncationJul 26 2016In this paper we study uniform versions of two limit theorems in random left truncation model (RLTM). The law of large numbers (LLN) and the central limit theorem (CLT) have been obtained under the bracketing entropy conditions in this setting. The uniform ... More
Lie symmetries and conservation laws of the Hirota-Ramani equationNov 22 2011In this paper, Lie symmetry method is performed for the Hirota-Ramani (H-R) equation. We will find The symmetry group and optimal systems of Lie subalgebras. Furthermore, preliminary classification of its group invariant solutions, symmetry reduction ... More
A Robust Stability Condition for Subhomogeneous Cooperative Time-delay SystemsJul 01 2013May 15 2014In this manuscript, we present conditions for delay-independent stability of subhomogeneous cooperative time-delay systems. We consider the case where the time-delay system has a unique equilibrium at the origin and the case where it has a unique equilibrium ... More
Sequential quantum secret sharing in noisy environmentsSep 27 2017Sep 29 2017Sequential Quantum Secret Sharing schemes (QSS) do not use entangled states for secret sharing, rather they rely on sequential operations of the players on a single state which is circulated between the players. In order to check the viability of these ... More
On the Spectral Norms of Pseudo-Wigner and Related MatricesAug 14 2017We investigate the spectral norms of symmetric $N \times N$ matrices from two pseudo-random ensembles. The first is the pseudo-Wigner ensemble introduced in "Pseudo-Wigner Matrices" by Soloveychik, Xiang and Tarokh and the second is its sample covariance-type ... More
No-iteration of unknown quantum gatesOct 23 2015Jan 08 2016We propose a new no-go theorem by proving the impossibility of constructing a deterministic quantum circuit that iterates a unitary oracle by calling it only once. Different schemes are provided to bypass this result and to approximately realize the iteration. ... More
Point-like inclusion interactions in tubular membranesOct 13 2015Jul 12 2016We analytically study membrane mediated interactions between inclusions embedded in a tubular membrane. We model inclusions as constraints coupled to the curvature tensor of the membrane tube. First, as special test cases, we analyze the interaction between ... More
Edge proximity-induced magnetoresistance and spin polarization in ferromagnetic gated bilayer graphene nanoribbonJan 09 2014Coherent spin-dependent transport through a junction containing of Normal/Ferromagnetic/Normal bilayer graphene nanoribbon with zigzag edges is investigated by using Landauer formalism. In a more realistic set-up, the exchange field is induced by two ... More
A Robust Stability Condition for Subhomogeneous Cooperative Time-delay SystemsJul 01 2013Feb 25 2019A preliminary result on Subhomogeneous Cooperative Time-delay Systems, subject to revision.
Linking Classical and Quantum Stochastic ProcessesMay 13 2011Aug 29 2011We define a map which relates four dimensional classical stochastic matrices to qubit quantum channels. The map preserves the spectrum and the composition of processes. To do this we introduce the concept of Bloch tetrahedron which plays the same role ... More
A first principle (3+1) dimensional model for microtubule polymerizationOct 22 2008In this paper we propose a microscopic model to study the polymerization of microtubules (MTs). Starting from fundamental reactions during MT's assembly and disassembly processes, we systematically derive a nonlinear system of equations that determines ... More
Equivalence Classes of Permutations Modulo Replacements Between 123 and Two-Integer PatternsSep 18 2013We explore a new type of replacement of patterns in permutations, suggested by James Propp, that does not preserve the length of permutations. In particular, we focus on replacements between 123 and a pattern of two integer elements. We apply these replacements ... More
Transfer of d-Level quantum states through spin chains by random swappingDec 17 2006Jan 24 2007We generalize an already proposed protocol for quantum state transfer to spin chains of arbitrary spin. An arbitrary unknown $d-$ level state is transferred through a chain with rather good fidelity by the natural dynamics of the chain. We compare the ... More
Thermal effects on quantum communication through spin chainsDec 15 2004Feb 13 2005We study the effect of thermal fluctuations in a recently proposed protocol for transmission of unknown quantum states through quantum spin chains. We develop a low temperature expansion for general spin chains. We then apply this formalism to study exactly ... More
From a quantum mechanical description of the assembly processes in microtubules to their semiclassical nonlinear dynamicsMar 22 2007In this paper a quantum mechanical description of the assembly/disassembly process for microtubules is proposed. We introduce creation and annihilation operators that raise or lower the microtubule length by a tubulin layer. Following that, the Hamiltonian ... More
Mitigation of Policy Manipulation Attacks on Deep Q-Networks with Parameter-Space NoiseJun 04 2018Recent developments have established the vulnerability of deep reinforcement learning to policy manipulation attacks via intentionally perturbed inputs, known as adversarial examples. In this work, we propose a technique for mitigation of such attacks ... More
Models and Framework for Adversarial Attacks on Complex Adaptive SystemsSep 13 2017We introduce the paradigm of adversarial attacks that target the dynamics of Complex Adaptive Systems (CAS). To facilitate the analysis of such attacks, we present multiple approaches to the modeling of CAS as dynamical, data-driven, and game-theoretic ... More
A Note on the Concentration of Spectral Measure of Wigner's MatricesApr 19 2017Apr 21 2017In this short note we derive concentration inequalities for the empirical absolute moments of square symmetric matrices with independent symmetrically distributed +/-1 entries. Most of the previous results of this type are limited to functions with bounded ... More
On the Iterations of a Sequence of Strongly Quasi-nonexpansive Mappings with ApplicationsNov 09 2016In this paper, we study $\Delta$- convergence of iterations for a sequence of strongly quasi-nonexpansive mappings as well as the strong convergence of the Halpern type regularization of them in Hadamard spaces. Then, we give some their applications in ... More
Scaling of macroscopic superpositions close to a quantum phase transitionDec 26 2015May 07 2016It is well known that in a quantum phase transition (QPT), entanglement remains short ranged [Osterloh et al., Nature 416 608-610 (2005)]. We ask if there is a quantum property entailing the whole system which diverges near this point. Using the recently ... More
Prediction in Online Convex Optimization for Parametrizable Objective FunctionsJan 31 2019Feb 01 2019Many techniques for online optimization problems involve making decisions based solely on presently available information: fewer works take advantage of potential predictions. In this paper, we discuss the problem of online convex optimization for parametrizable ... More
DeepPos: Deep Supervised Autoencoder Network for CSI Based Indoor LocalizationNov 27 2018The widespread mobile devices facilitated the emergence of many new applications and services. Among them are location-based services (LBS) that provide services based on user's location. Several techniques have been presented to enable LBS even in indoor ... More
Scalability of Controlling Heterogenous Stress-Engineered MEMS Microrobots (MicroStressBots) through Common Control Signal using Electrostatic HysteresisJul 07 2015Jul 19 2015In this paper we present control strategies for implementing reconfigurable planar microassmbly using multiple stress-engineered MEMS microrobots (MicroStressBots). A MicroStressBot is an electrostatic microrobot that consists of an untethered scratch ... More
Unusual thermoelectric transport anisotropy in quasi-2D, rhombohedral GeTeApr 12 2019In this study, we calculate the $T$=300 K scattering and thermoelectric transport properties of rhombohedral GeTe using first-principles modeling. The room-temperature phase of GeTe has a layered structure, with cross-plane and in-plane directions oriented ... More
Spatially Coupled LDPC Codes with Non-uniform Coupling for Improved Decoding SpeedApr 12 2019We consider spatially coupled low-density parity-check codes with finite smoothing parameters. A finite smoothing parameter is important for designing practical codes that are decoded using low-complexity windowed decoders. By optimizing the amount of ... More
Some results on singular value inequalities of normal operatorsAug 19 2013Dec 07 2015Let $x=a+ib$ be a complex number, so we have the following inequality $$(1/\sqrt{2})|a+b|\leq |x|\leq |a|+|b|$$ We give an operator version of above inequality. Also we obtain some results for normal operators.
Cohering and de-cohering power of quantum channelsJun 07 2015Sep 06 2015We introduce the concepts of cohering and de-cohering power of quantum channels. Using the axiomatic definition of coherence measure, we show that the optimizations required for calculations of these measures can be restricted to pure input states and ... More
Electromagnetic field quantization in the presence of a rotating bodyMar 10 2014Starting from a Lagrangian, the electromagnetic field is quantized in the presence of a body rotating along its axis of symmetry. Response functions and fluctuation-dissipation relations are obtained. A general formula for rotational friction and power ... More
Causal Event Networks: Cognition, Complexity and Physical LawsFeb 26 2014Information flow framed in a computational and complexity context is relevant to the understanding of cognitive processes and awareness. In this paper, we begin with analyzing an information theory framework developed in recent years under Information ... More
Whatever Does Not Kill Deep Reinforcement Learning, Makes It StrongerDec 23 2017Recent developments have established the vulnerability of deep Reinforcement Learning (RL) to policy manipulation attacks via adversarial perturbations. In this paper, we investigate the robustness and resilience of deep RL to training-time and test-time ... More
Testing modified gravity with dwarf spheroidal galaxiesSep 12 2016The observed velocity dispersion of the classical dwarf spheroidal (dSph) galaxies of the Milky Way (MW) requires the Newtonian stellar mass-to-light ($M_*/L$) ratios in the range of about 10 to more than 100 solar units that are well outside the acceptable ... More
Quantum Secret Sharing and Random Hopping; Using single states instead of entanglementJun 09 2015Jul 18 2015Quantum protocols for secret sharing usually rely on multi-party entanglement which with present technology is very difficult to achieve. Recently it has been shown that sequential manipulation and communication of a single $d-$ level state can do the ... More
New Conditions for Sparse Phase RetrievalOct 04 2013Aug 15 2014We consider the problem of sparse phase retrieval, where a $k$-sparse signal ${\bf x} \in {\mathbb R}^n \textrm{ (or } {\mathbb C}^n\textrm{)}$ is measured as ${\bf y} = |{\bf Ax}|,$ where ${\bf A} \in {\mathbb R}^{m \times n} \textrm{ (or } {\mathbb ... More
Learning Bounds for Greedy Approximation with Explicit Feature Maps from Multiple KernelsOct 09 2018Nonlinear kernels can be approximated using finite-dimensional feature maps for efficient risk minimization. Due to the inherent trade-off between the dimension of the (mapped) feature space and the approximation accuracy, the key problem is to identify ... More
Adversarial Reinforcement Learning Framework for Benchmarking Collision Avoidance Mechanisms in Autonomous VehiclesJun 04 2018With the rapidly growing interest in autonomous navigation, the body of research on motion planning and collision avoidance techniques has enjoyed an accelerating rate of novel proposals and developments. However, the complexity of new techniques and ... More
The influence of anisotropic Rashba spin-orbit coupling on current-induced spin polarization in grapheneApr 13 2017Jun 08 2017We consider a disordered graphene layer with anisotropic Rashba spin-orbit coupling subjected to a longitudinal electric field. Using the linear response theory we calculate current-induced spin polarization including in-plane normal and parallel components ... More
Effect of anisotropy on generalized Chaplygin gas scalar field and its interaction with other dark energy modelsDec 07 2016In this work, we establish a correspondence between the interacting holographic, new agegraphic dark energy and generalized Chaplygin gas model in Bianchi type I universe. In continue, we reconstruct the potential of the scalar field which describes the ... More
Direct optical sensing of single unlabeled small proteins and super-resolution microscopy of their binding sitesOct 28 2013Oct 29 2013More than twenty years ago, scientists succeeded in pushing the limits of optical detection to single molecules using fluorescence. This breakthrough has revolutionized biophysical measurements, but restrictions in photophysics and labeling protocols ... More
Negative Norm States in de Sitter Space and QFT without Renormalization ProcedureJun 06 2000Nov 15 2002In recent papers [1,2], it has been shown that the presence of negative norm states or negative frequency solutions are indispensable for a fully covariant quantization of the minimally coupled scalar field in de Sitter space. Their presence, while leaving ... More
Covariant two point function for minimally coupled scalar field in de Sitter space-timeMay 08 2000Oct 13 2000In a recent paper [1], it has been shown that negative norm states are indispensable for a fully covariant quantization of the minimally coupled scalar field in de Sitter space. Their presence, while leaving unchanged the physical content of the theory, ... More
Two-qubit state sharing between N parties using only Bell pairs and Bell-measurementJun 14 2009Jun 23 2009A quantum protocol for sharing an arbitrary two-qubit state between N parties is introduced. Any of the members, can retrieve the state, only with collaboration of the other parties. We will show that in terms of resources, i.e. the number of classical ... More
A Distributed Dynamic Frequency Allocation AlgorithmNov 21 2007Mar 13 2008We consider a network model where the nodes are grouped into a number of clusters and propose a distributed dynamic frequency allocation algorithm that achieves performance close to that of a centralized optimal algorithm. Each cluster chooses its transmission ... More
Single-molecule spectroscopy near structured dielectricsOct 06 1998We present an analytical approach to the calculation of the linewidth and lineshift of an atom or molecule in the near field of a structured dielectric surface. For soft surface corrugations with amplitude lambda/50, we find variations of the linewidth ... More
Bivariate Discrete Generalized Exponential DistributionJan 13 2017In this paper we develop a bivariate discrete generalized exponential distribution, whose marginals are discrete generalized exponential distribution as proposed by Nekoukhou, Alamatsaz and Bidram ("Discrete generalized exponential distribution of a second ... More
Region Detection in Markov Random Fields: Gaussian CaseFeb 12 2018Mar 29 2018We consider the problem of model selection in Gaussian Markov fields in the sample deficient scenario. The benchmark information-theoretic results in the case of d-regular graphs require the number of samples to be at least proportional to the logarithm ... More
A simple model of Small-World Quantum NetworksMar 20 2019A simple model of small world quantum networks, in which a central node plays essential role, is introduced for sharing entanglement over long distances. In view of the challenges in setting up advanced quantum labs which allows only few nodes in a network ... More
Time Dilation as Quantum Tunneling TimeNov 26 2018Mar 05 2019We conjecture that the relative rate of time evolution depends on the amount of quantum correlations in a system. This is motivated by the experimental work [1] which showed that quantum tunneling is not instantaneous. The non-zero tunneling time may ... More
Realization of universal nonadiabatic geometric control on decoherence-free qubits in the XY modelOct 06 2017Dec 03 2017A fundamental requirement of quantum information processing is the protection from the adverse effects of decoherence and noise. Decoherence-free subspaces and geometric processing are important steps of quantum information protection. Here, we provide ... More
Nonlinear Sequential Accepts and Rejects for Identification of Top Arms in Stochastic BanditsJul 09 2017We address the M-best-arm identification problem in multi-armed bandits. A player has a limited budget to explore K arms (M<K), and once pulled, each arm yields a reward drawn (independently) from a fixed, unknown distribution. The goal is to find the ... More
Show, Ask, Attend, and Answer: A Strong Baseline For Visual Question AnsweringApr 11 2017Apr 12 2017This paper presents a new baseline for visual question answering task. Given an image and a question in natural language, our model produces accurate answers according to the content of the image. Our model, while being architecturally simple and relatively ... More
Universal non-adiabatic geometric manipulation of pseudo-spin charge qubitsOct 18 2015Apr 07 2017Reliable quantum information processing requires high-fidelity universal manipulation of quantum systems within the characteristic coherence times. Non-adiabatic holonomic quantum computation offers a promising approach to implement fast, universal, and ... More
Effective Simulation Methods for Structures with Local Nonlinearity: Magnus integrator and Successive ApproximationsNov 26 2014Nov 28 2014In the following, we discuss nonlinear simulations of nonlinear dynamical systems, which are applied in technical and biological models. We deal with different ideas to overcome the treatment of the nonlinearities and discuss a novel splitting approach. ... More
An efficient algorithm for structured sparse quantile regressionFeb 25 2013Quantile regression is studied in combination with a penalty which promotes structured (or group) sparsity. A mixed $\ell_{1,\infty}$-norm on the parameter vector is used to impose structured sparsity on the traditional quantile regression problem. An ... More
Information storing by biomagnetitesDec 13 2010Since the discovery of the presence of biogenic magnetites in living organisms, there have been speculations on the role that these biomagnetites play in cellular processes. It seems that the formation of biomagnetite crystals is a universal phenomenon ... More
A Study of the Speedups and Competitiveness of FPGA Soft Processor Cores using Dynamic Hardware/Software PartitioningOct 25 2007Field programmable gate arrays (FPGAs) provide designers with the ability to quickly create hardware circuits. Increases in FPGA configurable logic capacity and decreasing FPGA costs have enabled designers to more readily incorporate FPGAs in their designs. ... More
An Application of Joint Spectral Radius in Power Control Problem for Wireless CommunicationsJul 01 2013Resource management, including power control, is one of the most essential functionalities of any wireless telecommunication system. Various transmitter power-control methods have been developed to deliver a desired quality of service in wireless networks. ... More
The necessities for building a model to evaluate Business Intelligence projects- Literature ReviewMay 08 2012In recent years Business Intelligence (BI) systems have consistently been rated as one of the highest priorities of Information Systems (IS) and business leaders. BI allows firms to apply information for supporting their processes and decisions by combining ... More
A Decompilation Approach to Partitioning Software for Microprocessor/FPGA PlatformsOct 25 2007In this paper, we present a software compilation approach for microprocessor/FPGA platforms that partitions a software binary onto custom hardware implemented in the FPGA. Our approach imposes less restrictions on software tool flow than previous compiler ... More