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Results for "Yao Wang"

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Many-body singlets by dynamic spin polarizationJan 20 2011We show that dynamic spin polarization by collective raising and lowering operators can drive a spin ensemble from arbitrary initial state to many-body singlets, the zero-collective-spin states with large scale entanglement. For an ensemble of $N$ arbitrary ... More
Extreme eigenvalues of large-dimensional spiked Fisher matrices with applicationApr 20 2015Consider two $p$-variate populations, not necessarily Gaussian, with covariance matrices $\Sigma_1$ and $\Sigma_2$, respectively, and let $S_1$ and $S_2$ be the sample covariances matrices from samples of the populations with degrees of freedom $T$ and ... More
A Generalized Criterion for Signature-based Algorithms to Compute Gröbner BasesJun 24 2011A generalized criterion for signature-based algorithms to compute Gr\"obner bases is proposed in this paper. This criterion is named by "generalized criterion", because it can be specialized to almost all existing criteria for signature-based algorithms ... More
Resonant Propagation of Entangled Rhodium Mossbauer GammasOct 19 2006We report the resonant propagation of the long-lived Mossbauer gamma in the time-resolved Mossbauer spectroscopy. Recently, three entangled gammas emitted from the E3 rhodium Mossbauer transition has been proposed to interpret the extraordinary observations ... More
eOMP: Finding Sparser Representation by Recursively Orthonormalizing the Remaining AtomsFeb 12 2015Greedy algorithms for minimizing L0-norm of sparse decomposition have profound application impact on many signal processing problems. In the sparse coding setup, given the observations $\mathrm{y}$ and the redundant dictionary $\mathbf{\Phi}$, one would ... More
Inelastic Scatterings of Entangled Mossbauer GammasOct 11 2006Oct 12 2006We report the observation of the temperature-dependent inelastic scattering of three entangled Mossbauer gammas in the time-resolved Mossbauer spectroscopy. Recently, the long-lived E3 Mossbauer transition of rhodium generated by bremsstrahlung irradiation ... More
Possible Stimulated Emission of Entangled Rhodium Mossbauer GammasNov 02 2006Observation of possible stimulated emission of Mossbauer gamma is reported by liquid-nitrogen quenching of rhodium sample from room temperature to 77K in the time-resolved Mossbauer spectroscopy. Recently, we have demonstrated the anomalous emission of ... More
Berry Phase Effect on Exciton Transport and Bose Einstein CondensateJan 08 2008Jul 28 2008With exciton lifetime much extended in semiconductor quantum-well structures, their transport and Bose-Einstein condensation become a focus of research in recent years. We reveal a momentum-space gauge field in the exciton center-of-mass dynamics due ... More
Feedback control of nuclear hyperfine fields in double quantum dotMay 15 2009Nov 05 2010In a coupled double quantum dot system, we present a theory for the interplay between electron and nuclear spins when the two-electron singlet state is brought into resonance with one triplet state in moderate external magnetic field. We show that the ... More
On singular values distribution of a large auto-covariance matrix in the ultra-dimensional regimeJan 27 2015Let $(\varepsilon_{t})_{t>0}$ be a sequence of independent real random vectors of $p$-dimension and let $X_T=\sum_{t=s+1}^{s+T}\varepsilon_t\varepsilon^T_{t-s}/T$ be the lag-$s$ ($s$ is a fixed positive integer) auto-covariance matrix of $\varepsilon_t$. ... More
Stationary state solutions for a gently stochastic nonlinear wave equation with ultraviolet cutoffsMay 06 2010We consider a non-linear, one-dimensional wave equation system with finite-dimensional stochastic driving terms and with weak dissipation. A stationary process that solves the system is used to model steady-state non-equilibrium heat flow through a non-linear ... More
Reconstructing Speech Stimuli From Human Auditory Cortex Activity Using a WaveNet ApproachNov 06 2018Nov 08 2018The superior temporal gyrus (STG) region of cortex critically contributes to speech recognition. In this work, we show that a proposed WaveNet, with limited available data, is able to reconstruct speech stimuli from STG intracranial recordings. We further ... More
Modelling carbon-chain species formation in lukewarm corinos with new multi-phase modelsJan 04 2019Jan 11 2019Abundant carbon-chain species have been observed towards lukewarm corinos L1527, B228, and L483. These carbon-chain species are believed to be synthesized in the gas phase after CH$_4$ desorbs from the dust grain surface at the temperature around 30 K. ... More
Intervalley coupling by quantum dot confinement potentials in monolayer transition metal dichalcogenidesOct 23 2014Monolayer transition metal dichalcogenides (TMDs) offer new opportunities for realizing quantum dots (QDs) in the ultimate two-dimensional (2D) limit. Given the rich control possibilities of electron valley pseudospin discovered in the monolayers, this ... More
Equal heartbeat intervals and their effects on the nonlinearity of permutation-based time irreversibility in heart rateJan 24 2019Mar 09 2019The association of equal heartbeat intervals with cardiac conditions and the effect of the equality on permutation-based time irreversibility are investigated in this paper. We measure the distributions of equal heartbeat intervals under three conditions, ... More
Nonequilibrium electronic transport through a polymer chain: Role of solitonsJun 14 2012Nonequilibrium electronic transport through a polymer chain is investigated by the scattering state operator method. The polymer chain is described by an electron-lattice coupling model and its two ends are connected with metal electrodes of different ... More
On Borwein-Wiersma Decompositions of Monotone Linear RelationsDec 14 2009Monotone operators are of basic importance in optimization as they generalize simultaneously subdifferential operators of convex functions and positive semidefinite (not necessarily symmetric) matrices. In 1970, Asplund studied the additive decomposition ... More
Deep Residual Learning for Weakly-Supervised Relation ExtractionJul 27 2017Deep residual learning (ResNet) is a new method for training very deep neural networks using identity map-ping for shortcut connections. ResNet has won the ImageNet ILSVRC 2015 classification task, and achieved state-of-the-art performances in many computer ... More
Rhodium Mossbauer Supperadiance Induced by Liquid-Nitrogen CoolingJun 18 2007In the previous report, we have demonstrated cascade branching channels of the multipolar E3 transition of rhodium Mossbauer gamma via the time- and energy-resolved spectroscopy. Moreover, superradiance in the Borrmann channel from inverted nuclei gives ... More
Online Learning and Decision-Making under Generalized Linear Model with High-Dimensional DataDec 07 2018We propose a minimax concave penalized multi-armed bandit algorithm under generalized linear model (G-MCP-Bandit) for a decision-maker facing high-dimensional data in an online learning and decision-making process. We demonstrate that the G-MCP-Bandit ... More
Convex expansion for finite distributive lattices with applicationsOct 16 2018Mar 02 2019The concept of cutting is first explicitly introduced. By the concept, a convex expansion for finite distributive lattices is considered. Thus, a more general method for drawing the Hasse diagram is given, and the rank generating function of a finite ... More
A Systematic Study of Online Class Imbalance Learning with Concept DriftMar 20 2017As an emerging research topic, online class imbalance learning often combines the challenges of both class imbalance and concept drift. It deals with data streams having very skewed class distributions, where concept drift may occur. It has recently received ... More
Grid-independent Issue in Numerical Heat TransferSep 25 2006Sep 26 2006Grid independent is associated with the accuracy or even rationality of numerical results. This paper takes two-dimensional steady heat transfer for example to reveal the effect of grid resolution on numerical results. The law of grid dependence is obtained ... More
Efficient Aerosol Retrieval for Multi-angle Imaging SpectroRadiometer (MISR): A Bayesian ApproachAug 06 2017Recent research in Aerosol Optical Depth (AOD) retrieval algorithms for Multi-angle Imaging SpectroRadiometer (MISR) proposed a hierarchical Bayesian model. However the inference algorithm used in their work was Markov Chain Monte Carlo (MCMC), which ... More
On eigenvalues of a high-dimensional spatial-sign covariance matrixJan 28 2019Sample spatial-sign covariance matrix is a much-valued alternative to sample covariance matrix in robust statistics to mitigate influence of outliers. Although this matrix is widely studied in the literature, almost nothing is known on its properties ... More
Modelling multivariate volatilies via conditionally uncorrelated componentsJun 02 2005We propose to model multivariate volatility processes based on the newly defined conditionally uncorrelated components (CUCs). This model represents a parsimonious representation for matrix-valued processes. It is flexible in the sense that we may fit ... More
On embedding all $n$-manifolds into a single $(n+1)$-manifoldSep 24 2005For each composite number $n\ne 2^k$, there does not exist a single connected closed $(n+1)$-manifold such that any smooth, simply-connected, closed $n$-manifold can be topologically flat embedded into it. There is a single connected closed 5-manifold ... More
Ergodic properties of heterogeneous diffusion processes in a potential wellJan 29 2019Heterogeneous diffusion processes can be well described by an overdamped Langevin equation with space-dependent diffusivity $D(x)$. We investigate the ergodic and non-ergodic behavior of these processes in an arbitrary potential well $U(x)$ in terms of ... More
Tempered fractional Langevin-Brownian motion with inverse $β$-stable subordinatorJun 24 2018Time-changed stochastic processes have attracted great attention and wide interests due to their extensive applications, especially in financial time series, biology and physics. This paper pays attention to a special stochastic process, tempered fractional ... More
Feynman-Kac equation revisitedJun 10 2018Functionals of particles' paths have diverse applications in physics, mathematics, hydrology, economics, and other fields. Under the framework of continuous time random walk (CTRW), the governing equations for the probability density functions (PDFs) ... More
Vision-based Real-Time Aerial Object Localization and Tracking for UAV Sensing SystemMar 19 2017The paper focuses on the problem of vision-based obstacle detection and tracking for unmanned aerial vehicle navigation. A real-time object localization and tracking strategy from monocular image sequences is developed by effectively integrating the object ... More
On the maximal monotonicity of the sum of a maximal monotone linear relation and the subdifferential operator of a sublinear functionJan 01 2010The most important open problem in Monotone Operator Theory concerns the maximal monotonicity of the sum of two maximal monotone operators provided that Rockafellar's constraint qualification holds. In this note, we provide a new maximal monotonicity ... More
Solutions for Neumann boundary value problems involving $\big(p_{1}(x), p_{2}(x)\big)$-Laplace operatorsMay 16 2012In this paper we study the nonlinear Neumann boundary value problem of the following equations -\text{div}(|\nabla u|^{p_{1}(x)-2}\nabla u)-\text{div}(|\nabla u|^{p_{2}(x)-2}\nabla u)+|u|^{p_{1}(x)-2}u+|u|^{p_{2}(x)-2}u=\lambda f(x,u) in a bounded smooth ... More
On the penalized maximum likelihood estimation of high-dimensional approximate factor modelAug 22 2016Jan 17 2019In this paper, we mainly focus on the penalized maximum likelihood estimation (MLE) of the high-dimensional approximate factor model. Since the current estimation procedure can not guarantee the positive definiteness of the error covariance matrix, by ... More
Structure and enumeration results of matchable Lucas cubesOct 17 2018Mar 02 2019A lucasene is a hexagon chain that is similar to a fibonaccene, an $L$-fence is a poset the Hasse diagram of which is isomorphic to the directed inner dual graph of the corresponding lucasene. A new class of cubes, which named after matchable Lucas cubes ... More
Explicit and Implicit Constrained-Space Probabilistic Threshold Range Queries for Moving ObjectsNov 01 2013Dec 05 2013This paper studies the constrained-space probabilistic threshold range query (CSPTRQ) for moving objects. We differentiate two kinds of CSPTRQs: implicit and explicit ones. Specifically, for each moving object $o$, we assume $o$ cannot be located in some ... More
Structure and enumeration results of matchable Lucas cubesOct 17 2018Feb 26 2019A lucasene is a hexagon chain that is similar to a fibonaccene, an $L$-fence is a poset the Hasse diagram of which is isomorphic to the directed inner dual graph of the corresponding lucasene. A new class of cubes, which named after matchable Lucas cubes ... More
Subdiffusion in an external force fieldFeb 09 2019The phenomena of subdiffusion are widely observed in physical and biological systems. To investigate the effects of external potentials, say, harmonic potential, linear potential, and time dependent force, we study the subdiffusion described by subordinated ... More
Lévy-walk-like Langevin dynamicsOct 09 2018Continuous time random walks and Langevin equations are two classes of stochastic models for describing the dynamics of particles in the natural world. While some of the processes can be conveniently characterized by both of them, more often one model ... More
Monotone Linear Relations: Maximality and Fitzpatrick FunctionsMay 28 2008We analyze and characterize maximal monotonicity of linear relations (set-valued operators with linear graphs). An important tool in our study are Fitzpatrick functions. The results obtained partially extend work on linear and at most single-valued operators ... More
Examples of discontinuous maximal monotone linear operators and the solution to a recent problem posed by B.F. SvaiterSep 14 2009In this paper, we give two explicit examples of unbounded linear maximal monotone operators. The first unbounded linear maximal monotone operator $S$ on $\ell^{2}$ is skew. We show its domain is a proper subset of the domain of its adjoint $S^*$, and ... More
A Robust Riemann Solver for Multiple Hydro-Elastoplastic Solid MediumsFeb 03 2019We propose a robust approximate solver for the hydro-elastoplastic solid material, a general constitutive law extensively applied in explosion and high speed impact dynamics, and provide a natural transformation between the fluid and solid in the case ... More
Nanodot-Cavity Electrodynamics and Photon EntanglementDec 11 2003Quantum electrodynamics of excitons in a cavity is shown to be relevant to quantum operations. We present a theory of an integrable solid-state quantum controlled-phase gate for generating entanglement of two photons using a coupled nanodot-microcavity-fiber ... More
Regularity criteria for the 3D MHD equations in term of velocityDec 04 2013In this paper we consider three-dimensional incompressible magnetohydrodynamics equations. By using interpolation inequalities in anisotropic Lebesgue space, we provide regularity criteria involving the velocity or alternatively involving the fractional ... More
Pixel-wise object trackingNov 20 2017Jul 03 2018In this paper, we propose a novel pixel-wise visual object tracking framework that can track any anonymous object in a noisy background. The framework consists of two submodels, a global attention model and a local segmentation model. The global model ... More
Diversity encouraged learning of unsupervised LSTM ensemble for neural activity video predictionNov 15 2016Jul 03 2018Being able to predict the neural signal in the near future from the current and previous observations has the potential to enable real-time responsive brain stimulation to suppress seizures. We have investigated how to use an auto-encoder model consisting ... More
Topological photonic crystal with equifrequency Weyl pointsNov 30 2015Jul 01 2016Weyl points in three-dimensional photonic crystals behave as monopoles of Berry flux in momentum space. Here, based on general symmetry analysis, we show that a minimal number of four symmetry-related (consequently equifrequency) Weyl points can be realized ... More
Deterministic preparation of Dicke states of donor nuclear spins in silicon by cooperative pumpingSep 26 2011Apr 07 2012For donor nuclear spins in silicon, we show how to deterministically prepare various symmetric and asymmetric Dicke states which span a complete basis of the many-body Hilbert space. The state preparation is realized by cooperative pumping of nuclear ... More
Q-STAR:A Perceptual Video Quality Model Considering Impact of Spatial, Temporal, and Amplitude ResolutionsJun 11 2012In this paper, we investigate the impact of spatial, temporal and amplitude resolution (STAR) on the perceptual quality of a compressed video. Subjective quality tests were carried out on a mobile device. Seven source sequences are included in the tests ... More
Tidal Evolution of Kepler lower-mass PlanetsMay 13 2018The planets with a radius $<$ 4 $R$$_\oplus$ observed by the Kepler mission exhibit a unique feature, and propose a challenge for current planetary formation models. The tidal effect between a planet and its host star plays an essential role in reconfiguring ... More
A class of non-matchable distributive latticesOct 17 2018The set of all perfect matchings of a plane (weakly) elementary bipartite graph equipped with a partial order is a poset, moreover the poset is a finite distributive lattice and its Hasse diagram is isomorphic to $Z$-transformation directed graph of the ... More
Cohomogeneity-one $G_2$-Laplacian flow on 7-torusSep 07 2017We prove the hypersymplectic flow of simple type on standard torus $\mathbb{T}^4$ exists for all time and converges to the standard hyperK\"ahler structure module diffeomorphisms. This result in particular gives the first example of cohomogeneity-one ... More
Unsupervised Learning of Spike Patterns for Seizure Detection and Wavefront Estimation of High Resolution Micro Electrocorticographic (μECoG) DataJun 02 2017For the past few years, we have developed flexible, active, multiplexed recording devices for high resolution recording over large, clinically relevant areas in the brain. While this technology has enabled a much higher-resolution view of the electrical ... More
Multi Resolution LSTM For Long Term Prediction In Neural Activity VideoMay 08 2017Jul 03 2018Epileptic seizures are caused by abnormal, overly syn- chronized, electrical activity in the brain. The abnor- mal electrical activity manifests as waves, propagating across the brain. Accurate prediction of the propagation velocity and direction of these ... More
Optimal cube factors of Fibonacci and matchable Lucas cubesDec 10 2018The optimal cube factor of a graph, a special kind of component factor, is first introduced. Furthermore, the optimal cube factors of Fibonacci and matchable Lucas cubes are studied; and some results on the Padovan sequence and binomial coefficients are ... More
Identifying the number of factors from singular values of a large sample auto-covariance matrixOct 14 2014Oct 19 2015Identifying the number of factors in a high-dimensional factor model has attracted much attention in recent years and a general solution to the problem is still lacking. A promising ratio estimator based on the singular values of the lagged autocovariance ... More
First-principles calculations on temperature- dependent elastic constants of rare-earth intermetallic compounds:YAg and YCuApr 27 2011we present the temperature-dependent elastic constants of two ductile rare-earth intermetallic compounds YAg and YCu with CsCl-type B2 structure by using a first-principles approach. The elastic moduli as a function of temperature are predicted from the ... More
Coulomb effects on topological band inversion in the moiré of WSe$_2$/BAs heterobilayerMar 07 2019Quantum spin Hall (QSH) insulator with large gap is highly desirable for potential spintronics application. Here we realize electrically tunable QSH insulator with large gap in van der Waals heterobilayer of monolayer transition metal dichalcogenide (TMD) ... More
Dynamics of quantum coherence in Bell-diagonal states under Markovian channelsFeb 08 2019We study the curves of coherence for the Bell-diagonal states including $l_{1}$-norm of coherence and relative entropy of coherence under the Markovian channels in the first subsystem once. For a special Bell-diagonal state under bit-phase flip channel, ... More
Anomalous light cones and valley optical selection rules of interlayer excitons in twisted heterobilayersApr 06 2015Oct 16 2015We show that, because of the inevitable twist and lattice mismatch in heterobilayers of transition metal dichalcogenides, interlayer excitons have six-fold degenerate light cones anomalously located at finite velocities on the parabolic energy dispersion. ... More
Intrinsic spin Hall effect in monolayers of group-VI dichalcogenides: A first-principles studySep 10 2012Oct 09 2012Using first-principles calculations within density functional theory, we investigate the intrinsic spin Hall effect in monolayers of group-VI transition-metal dichalcogenides MX2 (M = Mo, W and X = S, Se). MX2 monolayers are direct band-gap semiconductors ... More
An extreme ultraviolet wave generating upward secondary waves in a streamer-like solar structureApr 19 2018Extreme ultraviolet (EUV) waves, spectacular horizontally propagating disturbances in the low solar corona, always trigger horizontal secondary waves (SWs) when they encounter ambient coronal structure. We present a first example of upward SWs in a streamer-like ... More
Influences of pump transitions on thermal effects of multi-kilowatt thulium-doped fiber lasersMar 25 2015Thermal effects are critical constrains for developing high-power thulium-doped fiber lasers (TDFLs). In this paper, we numerically investigate the lasing and thermal characteristics of the TDFLs under different pump transitions. Our results show, the ... More
Every maximally monotone operator of Fitzpatrick-Phelps type is actually of dense typeApr 05 2011We show that every maximally monotone operator of Fitzpatrick-Phelps type defined on a real Banach space must be of dense type. This provides an affirmative answer to a question posed by Stephen Simons in 2001 and implies that various important notions ... More
The Brézis-Browder Theorem in a general Banach spaceOct 26 2011During the 1970s Br\'ezis and Browder presented a now classical characterization of maximal monotonicity of monotone linear relations in reflexive spaces. In this paper, we extend and refine their result to a general Banach space.
Monotone operators and "bigger conjugate" functionsAug 12 2011We study a question posed by Stephen Simons in his 2008 monograph involving "bigger conjugate" (BC) functions and the partial infimal convolution. As Simons demonstrated in his monograph, these function have been crucial to the understanding and advancement ... More
Magnetic-Field-Dependent Raman Scattering in Multiferroic Bilayer Films: Evidence for Stress-Mediated Magnetoelectric CouplingFeb 16 2009We report the first magnetic-field-dependent Raman scattering studies on Pb(Zr,Ti)O3-CoFe2O4 bilayer multiferroic system. The phonon frequencies of the nano-bilayers obviously change with magnetic field, which is absent in the single Pb(Zr,Ti)O3 films. ... More
Radial basis function process neural network training based on generalized frechet distance and GA-SA hybrid strategyJan 09 2014For learning problem of Radial Basis Function Process Neural Network (RBF-PNN), an optimization training method based on GA combined with SA is proposed in this paper. Through building generalized Fr\'echet distance to measure similarity between time-varying ... More
Super-resolution reconstruction of hyperspectral images via low rank tensor modeling and total variation regularizationJan 23 2016In this paper, we propose a novel approach to hyperspectral image super-resolution by modeling the global spatial-and-spectral correlation and local smoothness properties over hyperspectral images. Specifically, we utilize the tensor nuclear norm and ... More
The Solvability Of Magneto-heating Coupling Model With Turbulent Convection Zone And The Flow FieldsDec 06 2017In this paper, the magneto-heating coupling model is studied in details, with turbulent convection zone and the flow field involved. Our main work is to analyze the well-posed property of this model with the regularity techniques. For the magnetic field, ... More
Semiparametric Mixture Regression with Unspecified Error DistributionsNov 02 2018In fitting a mixture of linear regression models, normal assumption is traditionally used to model the error and then regression parameters are estimated by the maximum likelihood estimators (MLE). This procedure is not valid if the normal assumption ... More
Robust Contextual Bandit via the Capped-$\ell_{2}$ normAug 17 2017This paper considers the actor-critic contextual bandit for the mobile health (mHealth) intervention. The state-of-the-art decision-making methods in mHealth generally assume that the noise in the dynamic system follows the Gaussian distribution. Those ... More
Large deviations for stochastic differential delay equations with Lévy noisesNov 14 2015Nov 27 2015In this paper, we establish a large deviation principle for stochastic differential delay equations driven by both Brownian motions and Poisson random measures. The weak convergence method plays an important role.
A New Electron Density Model for Estimation of Pulsar and FRB DistancesOct 29 2016We present a new model for the distribution of free electrons in the Galaxy, the Magellanic Clouds and the intergalactic medium (IGM) that can be used to estimate distances to real or simulated pulsars and fast radio bursts (FRBs) based on their dispersion ... More
Skyrmions in the moiré of van der Waals 2D magnetsOct 07 2018We explore the skyrmion formation and control possibilities in 2D magnets from the ubiquitous moir\'e pattern in vdW heterostructures. Using the example of a ferromagnetic monolayer on an antiferromagnetic substrate, we demonstrate a new origin of skyrmions ... More
Large magnetic anisotropy predicted for rare-earth free Fe16-xCoxN2 alloysOct 11 2016Structures and magnetic properties of Fe16-xCoxN2 are studied using adaptive genetic algorithm and first-principles calculations. We show that substituting Fe by Co in Fe16N2 with Co/Fe ratio smaller than 1 can greatly improve the magnetic anisotropy ... More
Very Long Term Field of View Prediction for 360-degree Video StreamingFeb 04 2019360-degree videos have gained increasing popularity in recent years with the developments and advances in Virtual Reality (VR) and Augmented Reality (AR) technologies. In such applications, a user only watches a video scene within a field of view (FoV) ... More
Determination of the Sun's Offset from the Galactic Plane Using PulsarsApr 05 2017We derive the Sun's offset from the local mean Galactic plane($z_\odot$) using the observed $z$ distribution of young pulsars. Pulsar distances are obtained from measurements of annual parallax, HI absorption spectra or associations where available and ... More
Image Super-Resolution Using VDSR-ResNeXt and SRCGANOct 10 2018Over the past decade, many Super Resolution techniques have been developed using deep learning. Among those, generative adversarial networks (GAN) and very deep convolutional networks (VDSR) have shown promising results in terms of HR image quality and ... More
Scattering below ground state of 3D focusing cubic fractional Schordinger equation with radial dataFeb 10 2017Jun 14 2017The aim of this note is to adapt the strategy in [4][See,B.Dodson, J.Murphy, a new proof of scattering below the ground state for the 3D radial focusing cubic NLS, arXiv:1611.04195 ] to prove the scattering of radial solutions below sharp threshold for ... More
A Comparison of Approaches in Fitting Continuum SEDsNov 19 2012We present a detailed comparison of two approaches, the use of a pre-calculated database and simulated annealing (SA), for fitting the continuum spectral energy distribution (SED) of astrophysical objects whose appearance is dominated by surrounding dust. ... More
Multiple Description Convolutional Neural Networks for Image CompressionJan 20 2018Multiple description coding (MDC) is able to stably transmit the signal in the un-reliable and non-prioritized networks, which has been broadly studied for several decades. However, the traditional MDC doesn't well leverage image's context features to ... More
Valley polarization in MoS2 monolayers by optical pumpingFeb 08 2012We report experimental evidences on selective occupation of the degenerate valleys in MoS2 monolayers by circularly polarized optical pumping. Over 30% valley polarization has been observed at K and K' valley via the polarization resolved luminescence ... More
Multiqubit Greenberger-Horne-Zeilinger state generated by synthetic magnetic field in circuit QEDApr 07 2017We propose a scheme to generate Greenberger-Horne-Zeilinger (GHZ) state for N superconducting qubits in a circuit QED system. By sinusoidally modulating the qubit-qubit coupling, a synthetic magnetic field has been made which broken the time-reversal ... More
Quantum coherence in mutually unbiased basesFeb 06 2019Feb 07 2019We investigate the $l_{1}$ norm of coherence of quantum states in mutually unbiased bases. We find that the sum of squared $l_{1}$ norm of coherence of the mixed state single qubit is less than two. We derive the $l_{1}$ norm of coherence of three classes ... More
Wireless Video Multicast with Cooperative and Incremental Transmission of Parity PacketsJan 15 2014In this paper, a cooperative multicast scheme that uses Randomized Distributed Space Time Codes (R-DSTC), along with packet level Forward Error Correction (FEC), is studied. Instead of sending source packets and/or parity packets through two hops using ... More
New Insights on Low Energy $πN$ Scattering Amplitudes: Comprehensive Analyses at $\mathcal{O}(p^3)$ LevelNov 24 2018Feb 28 2019A production representation of partial-wave $S$ matrix is utilized to construct low-energy elastic pion-nucleon scattering amplitudes from cuts and poles on complex Riemann sheets. Among them, the contribution of left-hand cuts is estimated using the ... More
Classification of arbitrary-dimensional multipartite pure states under stochastic local operations and classical communication using the rank of coefficient matrixSep 01 2012Feb 05 2013We study multipartite entanglement under stochastic local operations and classical communication (SLOCC) and propose the entanglement classification under SLOCC for arbitrary-dimensional multipartite ($n$-qudit) pure states via the rank of coefficient ... More
Band structure renormalization and weak pseudogap behavior in Na_{0.33}CoO_2: Fluctuation exchange study based on a single band modelAug 19 2007Mar 16 2008Based on a single band Hubbard model and the fluctuation exchange approximation, the effective mass and the energy band renormalization in Na$_{0.33}$CoO$_2$ is elaborated. The renormalization is observed to exhibit certain kind of anisotropy, which agrees ... More
Ultrafast initialization and QND-readout of a spin qubit via control of nanodot-vacuum couplingAug 06 2004Aug 06 2004Ultrafast initialization enables fault-tolerant processing of quantum information while QND readout enables scalable quantum computation. By spatially assembling photon resonators and wave-guides around an n-doped nanodot and by temporally designing optical ... More
The initial morphologies of the wavefronts of extreme ultraviolet wavesDec 20 2018The morphologies of the wavefronts of extreme ultraviolet (EUV) waves can shed light on their physical nature and driving mechanism that are still strongly debated. In reality, the wavefronts always deform after interacting with ambient coronal structures ... More
Shrinkage degree in $L_2$-re-scale boosting for regressionMay 17 2015Re-scale boosting (RBoosting) is a variant of boosting which can essentially improve the generalization performance of boosting learning. The key feature of RBoosting lies in introducing a shrinkage degree to re-scale the ensemble estimate in each gradient-descent ... More
Energy-saving Pushing Based on Personal Interest and Context InformationMar 26 2016Pushing files to users based on predicting the personal interest of each user may provide higher throughput gain than broadcasting popular files to users based on their common interests. However, the energy consumed at base station for pushing files individually ... More
Global existence and incompressible limit in critical spaces for compressible flow of liquid crystalsJul 31 2015The Cauchy problem for the compressible flow of nematic liquid crystals in the framework of critical spaces is considered. We first establish the existence and uniqueness of global solutions provided that the initial data are close to some equilibrium ... More
For maximally monotone linear relations, dense type, negative-infimum type, and Fitzpatrick-Phelps type all coincide with monotonicity of the adjointMar 31 2011It is shown that, for maximally monotone linear relations defined on a general Banach space, the monotonicities of dense type, of negative-infimum type, and of Fitzpatrick-Phelps type are the same and equivalent to monotonicity of the adjoint. This result ... More
A Survey on Expert Recommendation in Community Question AnsweringJul 15 2018Community question answering (CQA) represents the type of Web applications where people can exchange knowledge via asking and answering questions. One significant challenge of most real-world CQA systems is the lack of effective matching between questions ... More
Berry phase modification to the energy spectrum of excitonsJul 31 2015Sep 21 2015By quantizing the semiclassical motion of excitons, we show that the Berry curvature can cause an energy splitting between exciton states with opposite angular momentum. This splitting is determined by the Berry curvature flux through the $\bm k$-space ... More
Developing spatiotemporal solitons in step-index multimode fibersJul 19 2016Spatiotemporal solitons (STSs) are localized solitary waves in both space and time that involve complex linear and nonlinear processes. Optical STSs have been observed in various media, but they are difficult to be realized in multimode fibers due to ... More
Including many-body screening into self-consistent calculations: Tight-binding model studies with the Gutzwiller approximationSep 14 2011We introduce a scheme to include many-body screening processes explicitly into a set of self-consistent equations for electronic structure calculations using the Gutzwiller approximation. The method is illustrated by the application to a tight-binding ... More
A Rprop-Neural-Network-Based PV Maximum Power Point Tracking Algorithm with Short-Circuit Current LimitationNov 29 2018Dec 06 2018This paper proposes a resilient-backpropagation-neural-network-(Rprop-NN) based algorithm for Photovoltaic (PV) maximum power point tracking (MPPT). A supervision mechanism is proposed to calibrate the Rprop-NN-MPPT reference and limit short-circuit current ... More