Results for "Wei Zhu"

total 27886took 0.18s
On the patterns observed in Kepler multi-planet systemsJul 03 2019Recent studies claimed that planets around the same star have similar sizes and masses and regular spacings, and that planet pairs usually show ordered sizes such that the outer planet is usually the larger one. Here I show that these patterns can be ... More
Improved Bethe-Heitler formulaJan 01 2019The bremsstrahlung cross section of electron in the atomic electric field is re-derived using the time ordered perturbative theory. The results are compared with the Bethe-Heitler formula. We indicate that both the TOPT-description and a soft version ... More
Analysis on Metric Space QJul 21 2006Jul 26 2006In this paper, we show that the metric space Q is a positively-curved space (PC-space) in the sense of Alexandrov. We also discuss some issues like metric tangent cone and exponential map of Q. Then we give a stratification of this metric space according ... More
A new approach to parton recombination in a QCD evolution equationSep 15 1998Parton recombination is reconsidered in perturbation theory without using the AGK cutting rules in the leading order of the recombination. We use time-ordered perturbation theory to sum the cut diagrams, which are neglected in the GLR evolution equation. ... More
A Theorem on Frequency Function for Multiple-Valued Dirichlet Minimizing FunctionsJul 23 2006Jul 26 2006This paper discusses the frequency function of multiple-valued Dirichlet minimizing functions in the special case when the domain and range are both two dimensional. It shows that the frequency function must be of value k/2 for some nonnegative integer ... More
Model independent investigation of the $R_{J/ψ,η_c}$ and ratios of decay widths of semileptonic $B_c$ decays into a P-wave charmoniumAug 31 2018Jun 10 2019Experimental measurements of decay branching fractions of semitaunic and semimuonic $B_c$ into $J/\psi$ has challenged the lepton flavor universality in standard model with about two standard deviations. In this paper, we first investigate the unitary ... More
The Super Earth-Cold Jupiter RelationsMay 07 2018Jul 05 2018We report relations between inner ($<1$ au) super Earths (planets with mass/radius between Earth and Neptune) and outer ($>1$ au) giant planets (mass $>0.3~M_{\rm J}$, or cold Jupiters) around Sun-like stars, based on data from both ground-based radial ... More
Matching Using Sufficient Dimension Reduction for Causal InferenceFeb 01 2017To estimate casual treatment effects, we propose a new matching approach based on the reduced covariates obtained from sufficient dimension reduction. Compared to the original covariates and the propensity score, which are commonly used for matching in ... More
Particle multiplicities at LHC and deviations from limiting fragmentationMay 17 2010The pseudorapidity density of charged particles produced at LHC collisions are predicted by using two complementary production mechanisms with a set of consistent integrated and unintegrated parton distributions. We discuss the limiting fragmentation ... More
Reliable Identification of Redundant Kernels for Convolutional Neural Network CompressionDec 10 2018To compress deep convolutional neural networks (CNNs) with large memory footprint and long inference time, this paper proposes a novel pruning criterion using layer-wised Ln-norm of feature maps. Different from existing pruning criteria, which are mainly ... More
The gluon condensation at high energy hadron collisionsFeb 08 2017We report that the saturation/CGC model of gluon distribution is unstable under action of the chaotic solution in a nonlinear QCD evolution equation, and it evolves to the distribution with a sharp peak at the critical momentum. We find that this gluon ... More
Nucleon spin structure II: Spin structure function $g_1^p$ at small $x$Mar 08 2015The spin structure function $g_1^p$ of the proton is studied in a two component framework, where the perturbative evolution of parton distributions and nonperturbative vector meson dominance model are used. We predict the $g_1^p$ asymmetric behavior at ... More
Diagnosis and Prediction of the 2015 Chinese Stock Market BubbleMay 23 2019Jun 13 2019In this study, we perform a novel analysis of the 2015 financial bubble in the Chinese stock market by calibrating the Log Periodic Power Law Singularity (LPPLS) model to two important Chinese stock indices, SSEC and SZSC, from early 2014 to June 2015. ... More
Weighted estimates for the multilinear maximal function on the upper half-spacesMay 14 2017Aug 24 2018For a general dyadic grid, we give a Calder\'{o}n-Zygmund type decomposition, which is the principle fact about the multilinear maximal function $\mathfrak{M}$ on the upper half-spaces. Using the decomposition, we study the boundedness of $\mathfrak{M}.$ ... More
A Strong Formulation for Stochastic Multiple Constrained Resources Air Traffic Flow Management with ReroutesFeb 26 2019Mar 10 2019This paper addresses the air traffic flow management research problem of determining reroute, ground delay and air delay for flights using stochastic weather forecast information. The overall goal is to minimize system-wide reroute and delay costs. This ... More
Prediction for unintegrated parton distributionsMar 18 2009Oct 13 2009Unintegrated parton distributions in the proton and nucleus are predicted by a modified DGLAP equation incorporating the shadowing corrections, which include exact energy-momentum conservation in each splitting and fusion vertices. We find that the nuclear ... More
Regularity of Dirichlet nearly minimizing multiple-valued functionsJun 07 2007In this paper, we extend the related notions of Dirichlet quasiminimizer, $\omega-$minimizer and almost minimizer to the framework of multiple-valued functions in the sense of Almgren and prove Holder regularity results. We also give examples of those ... More
Properties of the gluon recombination functionsJun 21 2004Sep 29 2013The gluon recombination functions in the twist-4 QCD evolution equations are studied at the leading logarithmic approximation using both the covariant and non-covariant methods. We justify that the infrared singularities in the twist-4 coefficient functions ... More
A Polynomial Time Algorithm for Fair Resource Allocation in Resource ExchangeMay 05 2019The rapid growth of wireless and mobile Internet has led to wide applications of exchanging resources over network, in which how to fairly allocate resources has become a critical challenge. To motivate sharing, a BD Mechanism is proposed for resource ... More
Augmenting WFIRST Microlensing with a Ground-based Telescope NetworkJan 12 2016Feb 08 2016Augmenting the \emph{WFIRST} microlensing campaigns with intensive observations from a ground-based network of wide-field survey telescopes would have several major advantages. First, it would enable full two-dimensional (2-D) vector microlens parallax ... More
RCR: Robust Compound Regression for Robust Estimation of Errors-in-Variables ModelAug 12 2015The errors-in-variables (EIV) regression model, being more realistic by accounting for measurement errors in both the dependent and the independent variables, is widely adopted in applied sciences. The traditional EIV model estimators, however, can be ... More
Extension of Rough Set Based on Positive Transitive RelationJun 07 2019Jun 13 2019The application of rough set theory in incomplete information systems is a key problem in practice since missing values almost always occur in knowledge acquisition due to the error of data measuring, the limitation of data collection, or the limitation ... More
Real-time Prediction of Bitcoin Bubble CrashesMay 23 2019Jun 13 2019In the past decade, Bitcoin as an emerging asset class has gained widespread public attention because of their extraordinary returns in phases of extreme price growth and their unpredictable massive crashes. We apply the log-periodic power law singularity ... More
Binding effects and nuclear shadowingSep 16 1996The effects of nuclear binding on nuclear structure functions have so far been studied mainly at fixed target experiments, and there is currently much interest in obtaining a clearer understanding of this phenomenon. We use an existing dynamical model ... More
Can $X(5568)$ be a tetraquark state?Feb 29 2016Apr 30 2016Very recently, the D0 collaboration has reported the observation of a narrow structure, $X(5568)$, in the decay process $X(5568)\to B^0_s\pi^\pm$ using the 10.4${\rm fb}^{-1}$ data of $p\bar p$ collision at $\sqrt s= 1.96$ TeV. This structure is of great ... More
Stochastic Modeling and Analysis of User-Centric Network MIMO SystemsAug 21 2018This paper provides an analytical performance characterization of both uplink (UL) and downlink (DL) user-centric network multiple-input multiple-output (MIMO) systems, where a cooperating BS cluster is formed for each user individually and the clusters ... More
Small-World Network Effect in Competing Glauber- and Kawasaki-type DynamicsNov 12 2003In this article, we investigate the competing Glauber-type and Kawasaki-type dynamics with small-world network (SWN) effect, in the framework of the Gaussian model. The Glauber-type single-spin transition mechanism with probability p simulates the contact ... More
Decay of spin-1/2 field around Reissner-Nordstrom black holeSep 16 2003To find what influence the charge of the black hole $Q$ will bring to the evolution of the quasinormal modes, we calculate the quasinormal frequencies of the neutrino field (charge $e=0$) perturbations and those of the massless Dirac field ($e\neq 0$) ... More
A reduced-form model for level-1 limit order booksAug 31 2015Oct 19 2015One popular approach to model the limit order books dynamics of the best bid and ask at level-1 is to use the reduced-form diffusion approximations. It is well known that the biggest contributing factor to the price movement is the imbalance of the best ... More
Thermoelectric effect in a parallel double quantum dot structureDec 18 2011Dec 20 2011We discuss the thermoelectric properties assisted by the Fano effect of a parallel double quantum dot (QD) structure. By adjusting the couplings between the QDs and leads, we facilitate the nonresonant and resonant channels for the Fano interference. ... More
A statistical classification of the unassociated gamma-ray sources in the second Fermi Large Area Telescope CatalogApr 15 2013With assistance of the identified/associated sources in the second Fermi Large Area Telescope (LAT) catalog, we analyze and resolve the spatial distribution and the distributions of the gamma-ray spectral and variability indices of the remaining 575 unassociated ... More
Interpretation of the newly observed $Ω_c^0$ resonancesApr 01 2017Jul 06 2017We study the charmed and bottomed doubly strange baryons within the heavy-quark-light-diquark framework. The two strange quarks are assumed to lie in $S$ wave and thus their total spin is 1. We calculate the mass spectra of the $S$ and $P$ wave orbitally ... More
Sudden transition from naked atom decay to dressed atom decayJul 09 2015The studies on quantum open system play key roles not only in fundamental problems in quantum mechanics but also in quantum computing and information processes. Here we propose a scheme to use a one dimensional coupling cavity array (CCA) as an artificial ... More
Possible $J^{PC} = 0^{--}$ Charmonium-like StateMar 19 2010Jun 07 2010We study the possible charmonium-like states with $J^{PC}=0^{--}, 0^{-+}$ using the tetraquark interpolating currents with the QCD sum rules approach. The extracted masses are around 4.5 GeV for the $0^{--}$ charmonium-like states and 4.6 GeV for the ... More
Recoverability of Group Sparse Signals from Corrupted Measurements via Robust Group LassoSep 28 2015This paper considers the problem of recovering a group sparse signal matrix $\mathbf{Y} = [\mathbf{y}_1, \cdots, \mathbf{y}_L]$ from sparsely corrupted measurements $\mathbf{M} = [\mathbf{A}_{(1)}\mathbf{y}_{1}, \cdots, \mathbf{A}_{(L)}\mathbf{y}_{L}] ... More
Towards High Performance Video Object Detection for MobilesApr 16 2018Despite the recent success of video object detection on Desktop GPUs, its architecture is still far too heavy for mobiles. It is also unclear whether the key principles of sparse feature propagation and multi-frame feature aggregation apply at very limited ... More
A new perspective on gluon distribution at small xMar 29 2007Mar 09 2016The corrections of the gluon fusion to the BFKL equation in a unified partonic framework are studied. This modified BFKL equation predicts a stronger shadowing, which suppresses the gluon density and even leads to the gluon disappearance below the saturation ... More
Gluon quasidistribution function at one loopAug 08 2017Feb 05 2018We study the unpolarized gluon quasidistribution function in the nucleon at one loop level in the large momentum effective theory. For the quark quasidistribution, power law ultraviolet divergences arise in the cut-off scheme and an important observation ... More
Revisiting the Long-Period Transiting Planets from KeplerJan 07 2019May 30 2019Currently, we have only limited means to probe the presence of planets at large orbital separations. Foreman-Mackey et al. searched for long-period transiting planets in the Kepler light curves using an automated pipeline. Here, we apply their pipeline, ... More
Kepler-730b is probably a hot Jupiter with a small companionAug 31 2018Here we draw attention to a candidate system with one hot Jupiter and one small, nearby companion, revealed by the recent Kepler data release (DR25). The hot Jupiter, Kepler-730b, has radius $R_{\rm p}=11.36^{+1.14}_{-0.98}~R_\oplus$ and orbital period ... More
Large deviation principles for the stochastic quasi-geostrophic equationApr 28 2012Mar 24 2013In this paper we establish the large deviation principle for the stochastic quasi-geostrophic equation in the subcritical case with small multiplicative noise. The proof is mainly based on the stochastic control and weak convergence approach. Some analogous ... More
Optical Flow Based Online Moving Foreground AnalysisNov 18 2018Obtained by moving object detection, the foreground mask result is unshaped and can not be directly used in most subsequent processes. In this paper, we focus on this problem and address it by constructing an optical flow based moving foreground analysis ... More
An Efficient Optical Flow Based Motion Detection Method for Non-stationary ScenesNov 18 2018Nov 21 2018Real-time motion detection in non-stationary scenes is a difficult task due to dynamic background, changing foreground appearance and limited computational resource. These challenges degrade the performance of the existing methods in practical applications. ... More
Design and Experimental Observation of Valley-Hall Edge States in Diatomic-Graphene-like Elastic WaveguidesDec 29 2017We report on the design and experimental validation of a two-dimensional phononic elastic waveguide exhibiting topological Valley-Hall edge states. The lattice structure of the waveguide is inspired by the diatomic graphene and it is imprinted in an initially ... More
The Possible $J^{PC}I^G=2^{++}2^+$ State X(1600)Nov 10 2004Apr 05 2006The interesting state X(1600) with $J^{PC}I^G=2^{++}2^+$ can't be a conventional $q \bar q$ meson in the quark model. Using a mixed interpolating current with different color configurations, we investigate the possible existence of X(1600) in the framework ... More
Secure Massive MIMO Systems with Limited RF ChainsOct 03 2016In future practical deployments of massive multi-input multi-output (MIMO) systems, the number of radio frequency (RF) chains at the base stations (BSs) may be much smaller than the number of BS antennas to reduce the overall expenditure. In this paper, ... More
Five-dimensional vacuum Einstein spacetimes in C-metric like coordinatesMay 14 2010Sep 28 2010A 5-dimensional Einstein spacetime with (non)vanishing cosmological constant is analyzed in detail. The metric is in close analogy with the 4-dimensional massless uncharged C-metric in many aspects. The coordinate system, horizons and causal structures, ... More
Modeling and Simulation of Liquid Crystal ElastomersJun 01 2010We consider a continuum model describing the dynamic behavior of nematic liquid crystal elastomers (LCEs) and implement a numerical scheme to solve the governing equations. In the model, the Helmholtz free energy and Rayleigh dissipation are used, within ... More
$x_F$ Dependence of Drell-Yan Transverse Moemtum BroadeningNov 11 1999Jun 05 2000We analyze $x_F$ dependence of Drell-Yan transverse momentum broadening in hadron-nucleus collisions. In terms of generalized factorization theorem, we show that the $x_F$ dependence of transverse momentum broadening, $ \Delta < q_T^2 > (x_F) $, can be ... More
Space-time properties of the higher twist amplitudesJul 13 1999A consistent and intuitive description of the twist-4 corrections to the hadron structure functions is presented in a QCD-improved parton model using time-ordered perturbative theory, where the collinear singularities are naturally eliminated. We identify ... More
Interaction and excitonic insulating transition in grapheneNov 27 2008May 11 2009The strong long-range Coulomb interaction between massless Dirac fermions in graphene can drive a semimetal-insulator transition. We show that this transition is strongly suppressed when the Coulomb interaction is screened by such effects as disorder, ... More
Hankel-type determinants for some combinatorial sequencesSep 22 2016Aug 02 2018In this paper we confirm several conjectures of Z.-W. Sun on Hankel-type determinants for some combinatorial sequences including Franel numbers, Domb numbers and Ap\'ery numbers. For any nonnegative integer $n$, define \begin{gather*}f_n:=\sum_{k=0}^n\binom ... More
The Gluon condensation in high energy cosmic raysSep 12 2017Sep 11 2018The gluon condensation (GC)-effects in high energy cosmic rays are investigated. After a brief review of the GC, several examples including gamma-, electron-, and positron-spectra in a broad GeV$\sim $TeV region can be explained by the GC-effects. We ... More
Scattering of a diatomic composite systemJan 25 2017We investigate the scattering problem of a two-particle composite system on a delta-function potential. Using the time independent scattering theory, we study how the transmission/reflection coefficients change with the height of external potential, the ... More
Modulating the electronic properties of graphdiyne nanoribbonsNov 07 2013By ab initio calculation, Au, Cu, Fe, Ni and Pt adatoms were proposed for modulating the electronic property of graphdiyne naoribbons (GDNRs). GDNRs of 1~4 nm in width were found to be stable at room temperature, and the thermal rates of Au, Cu, Fe, Ni ... More
$\mathbb{L}^p$-solutions for stochastic Navier-Stokes equations with jump noiseJul 27 2019We study the existence and uniqueness of solutions of 2D Stochastic Navier-Stokes equation with space irregular jump noise for initial data in certain Sobolev spaces of negative order. Comparing with the Galerkin approximation method, the main advantage ... More
Pre-inflationary dynamics of Starobinsky inflation and its generization in Loop Quantum Brans-Dicke CosmologyAug 29 2018Jan 28 2019Recently, the nonperturbative quantization scheme of loop quantum gravity has been extended to the Brans-Dicke theory and the corresponding loop quantum Brans-Dicke cosmology has been derived, which provides an essential platform to explore inflationary ... More
Sparse Adversarial Perturbations for VideosMar 07 2018Although adversarial samples of deep neural networks (DNNs) have been intensively studied on static images, their extensions in videos are never explored. Compared with images, attacking a video needs to consider not only spatial cues but also temporal ... More
Analytical result on the supercurrent through a superconductor/quantum-dot/superconductor junctionNov 26 2001Nov 30 2001We present an analytical result for the supercurrent across a superconductor/quantum-dot/superconductor junction. By converting the current integration into a special contour integral, we can express the current as a sum of the residues of poles. These ... More
Effective potentials for 6-coordinated Boron: a structural approachJun 30 1998We have built an ab-initio LDA energy database with over 60 hypothetical extended structures of pure Boron, in each of which the coordination environment of each atom is equivalent. Focusing on eleven 6-coordinated structures, which are most relevant ... More
Looking for quark saturation in proton and nucleiOct 16 2015Mar 05 2017The quark saturation behavior at low $Q^2$ is shown in a numeric solution of the DGLAP equation with parton recombination corrections, which resembles the widely discussed JIMWLK saturation of gluons. Our calculation suggests that the partonic saturation ... More
Nuclear Shadowing and Antishadowing in a Unitarized BFKL EquationJan 22 2008The nuclear shadowing and antishadowing effects are explained by a unitarized BFKL equation. The $Q^2$- and $x$-variations of the nuclear parton distributions are detailed based on the level of the unintegrated gluon distribution. In particular, the asymptotical ... More
The chaotic effects in a nonlinear QCD evolution equationMar 14 2016Aug 05 2016The corrections of gluon fusion to the DGLAP and BFKL equations are discussed in a united partonic framework. The resulting nonlinear evolution equations are the well-known GLR-MQ-ZRS equation and a new evolution equation. Using the available saturation ... More
Automatic Realistic Music Video Generation from Segments of Youtube VideosMay 29 2019A Music Video (MV) is a video aiming at visually illustrating or extending the meaning of its background music. This paper proposes a novel method to automatically generate, from an input music track, a music video made of segments of Youtube music videos ... More
Decentralized Dynamic Optimization for Power Network Voltage ControlJul 23 2016Voltage control in power distribution networks has been greatly challenged by the increasing penetration of volatile and intermittent devices. These devices can also provide limited reactive power resources that can be used to regulate the network-wide ... More
Novel rotating hairy black hole in (2+1)-dimensionsMay 26 2013Jun 03 2013We present some novel rotating hairy black hole metric in $(2+1)$ dimensions, which is an exact solution to the field equations of the Einstein-scalar-AdS theory with a non-minimal coupling. The scalar potential is determined by the metric ansatz and ... More
From EMC- and Cronin-effects to signals of quark-gluon plasmaDec 20 2010Jan 28 2013The EMC- and Cronin-effects are explained by a unitarized evolution equation, where the shadowing and antishadowing corrections are dynamically produced by gluon fusions. For this sake, an alternative form of the GLR-MQ-ZRS equation is derived. The resulting ... More
Carrier concentration dependence of optical Kerr nonlinearity in indium tin oxide filmsApr 28 2006Optical Kerr nonlinearity (n2) in n-type indium tin oxide (ITO) films coated on glass substrates has been measured using Z-scans with 200-fs laser pulses at wavelengths ranging from 720 to 780 nm. The magnitudes of the measured nonlinearity in the ITO ... More
Scalable low dimensional manifold model in the reconstruction of noisy and incomplete hyperspectral imagesMay 18 2016Mar 23 2018We present a scalable low dimensional manifold model for the reconstruction of noisy and incomplete hyperspectral images. The model is based on the observation that the spatial-spectral blocks of a hyperspectral image typically lie close to a collection ... More
Using Deep Neural Networks to Automate Large Scale Statistical Analysis for Big Data ApplicationsAug 09 2017Statistical analysis (SA) is a complex process to deduce population properties from analysis of data. It usually takes a well-trained analyst to successfully perform SA, and it becomes extremely challenging to apply SA to big data applications. We propose ... More
Strong solutions for SPDE with locally monotone coefficients driven by Lévy noiseAug 01 2011May 21 2013Motivated by applications to a manifold of semilinear and quasilinear stochastic partial differential equations (SPDEs) we establish the existence and uniqueness of strong solutions to coercive and locally monotone SPDEs driven by L\'{e}vy processes. ... More
Can a chaos term in the QCD evolution equation restrain high-energy collider physics?Apr 30 2008We indicate that the random aperiodic oscillation of the gluon distributions in a modified BFKL equation has the positive Lyapunov exponents. This first example of chaos in QCD evolution equations, raises the sudden disappearance of the gluon distributions ... More
Unparticle Physics and A_{FB}^b on the Z poleAug 06 2007Jan 03 2008An attempt has been made to address the 3\sigma anomaly of the forward-backward asymmetry of b quark in LEP data via an unparticle sector. For most part of the parameter space except certain particular regions, the anomaly could not be explained away ... More
A High-resolution DOA Estimation Method with a Family of Nonconvex PenaltiesDec 06 2017The low-rank matrix reconstruction (LRMR) approach is widely used in direction-of-arrival (DOA) estimation. As the rank norm penalty in an LRMR is NP-hard to compute, the nuclear norm (or the trace norm for a positive semidefinite (PSD) matrix) has been ... More
Gridless Two-dimensional DOA Estimation With L-shaped Array Based on the Cross-covariance MatrixDec 05 2017The atomic norm minimization (ANM) has been successfully incorporated into the two-dimensional (2-D) direction-of-arrival (DOA) estimation problem for super-resolution. However, its computational workload might be unaffordable when the number of snapshots ... More
Maximal inequalities and exponential estimates for stochastic convolutions driven by Lévy-type processes in Banach spaces with application to stochastic quasi-geostrophic equationsJul 27 2019We present remarkably simple proofs of Burkholder-Davis-Gundy inequalities for stochastic integrals and maximal inequalities for stochastic convolutions in Banach spaces driven by L\'{e}vy-type processes. Exponential estimates for stochastic convolutions ... More
D$\textbf{S}^3$L: Deep Self-Semi-Supervised Learning for Image RecognitionMay 23 2019Despite the recent progress in deep semi-supervised learning (Semi-SL), the amount of labels still plays a dominant role. The success in self-supervised learning (Self-SL) hints a promising direction to exploit the vast unlabeled data by leveraging an ... More
Inertial Proximal Incremental Aggregated Gradient MethodDec 04 2017Dec 18 2017In this paper, we introduce an inertial version of the Proximal Incremental Aggregated Gradient method (PIAG) for minimizing the sum of smooth convex component functions and a possibly nonsmooth convex regularization function. Theoretically, we show that ... More
Strong decays of $D_{sJ}(2317)$ and $D_{sJ}(2460)$Oct 04 2005With the identification of ($D_{sJ}(2317), D_{sJ}(2460)$) as the ($0^+$, $1^+$) doublet in the heavy quark effective field theory, we derive the light cone QCD sum rule for the coupling of eta meson with $D_{sJ}(2317) D_s $ and $D_{sJ}(2460) D_s^{*} $. ... More
End-to-end Flow Correlation Tracking with Spatial-temporal AttentionNov 03 2017Feb 27 2018Discriminative correlation filters (DCF) with deep convolutional features have achieved favorable performance in recent tracking benchmarks. However, most of existing DCF trackers only consider appearance features of current frame, and hardly benefit ... 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
Enhancing and Combining Sequential and Tree LSTM for Natural Language InferenceSep 20 2016Reasoning and inference are central to human and artificial intelligence. Modeling inference in human language is notoriously challenging but is fundamental to natural language understanding and many applications. With the availability of large annotated ... More
A regularity theory for multiple-valued Dirichlet minimizing mapsAug 07 2006This paper discusses the regularity of multiple-valued Dirichlet minimizing maps into the sphere. It shows that even at branched point, as long as the normalized energy is small enough, we have the energy decay estimate. Combined with the previous work ... More
A geometrizing higher twist effect on nuclear targetAug 30 2004Feb 13 2005The higher twist effects in deep inelastic scattering on the nuclear target are studied using time ordered perturbation theory. We showed that the collinear rescattering of the outgoing quark on the extra nucleons via the contacting gluon-pair is dominant ... More
Multi-appearance Segmentation and Extended 0-1 Program for Dense Small Object TrackingDec 14 2017Aiming to address the fast multi-object tracking for dense small object in the cluster background, we review track orientated multi-hypothesis tracking(TOMHT) with consideration of batch optimization. Employing autocorrelation based motion score test ... More
Temporal Cloak without SynchronizationDec 05 2018Considered to only exist in the fairy tales in the past, invisibility cloaks have been successively converted into reality no matter in the spatial domain or temporal domain. Inspired by the spatial cloaking, time gaps are utilized to hide temporal events. ... More
Time-Stretch Probing of Ultrafast Soliton Molecule DynamicsJan 11 2018Soliton molecules are the manifestation of attractive and repulsive interaction between optical pulses mediated by a nonlinear medium. However, the formation and breakup of soliton molecules are difficult to observe due to the transient nature of the ... More
Studies on cosmic ray nuclei with Voyager, ACE and AMS-02: I. local interstellar spectra and solar modulationJul 25 2018The acceleration of cosmic ray particles and their propagation in the Milky Way and the heliosphere tangle with each other, leading to complexity and degeneracy of the modeling of Galactic cosmic rays (GCRs). The recent measurements of the GCR spectra ... More
First-principles study of optical, elastic anisotropic and thermodynamic properties of TiN under high temperature and high pressureJun 22 2017The optical, elastic anisotropic and thermodynamic properties of TiN in the NaCl (B1) structure are analyzed in detail in the temperature range from 0 to 2000 K and the pressure range from 0 to 20 GPa. From the calculated dielectric constants, a first ... More
Exchange-dominated Standing Spin Wave Excitations under microwave irradiation in Ni80Fe20 Thin FilmsOct 23 2013We investigated the microwave-assisted DC voltages of ferromagnetic resonances and exchangedominated standing spin wave excitations in two different in-plane magnetized permalloy thin films via homodyne detection. The line shapes of ferromagnetic resonance ... More
Microwave-induced DC Signal in a Permalloy Thin Strip at Low Applied Magnetic FieldDec 03 2011We investigated the ferromagnetic resonance signals in a polycrystalline permalloy thin strip under in-plane low static magnetic field. A series of DC voltages, which contain ferromagnetic resonance or spin wave resonance signals, were measured by inducing ... More
One-Shot Texture Retrieval with Global Context MetricMay 16 2019In this paper, we tackle one-shot texture retrieval: given an example of a new reference texture, detect and segment all the pixels of the same texture category within an arbitrary image. To address this problem, we present an OS-TR network to encode ... More
Orthogonality-Promoting Distance Metric Learning: Convex Relaxation and Theoretical AnalysisFeb 16 2018Distance metric learning (DML), which learns a distance metric from labeled "similar" and "dissimilar" data pairs, is widely utilized. Recently, several works investigate orthogonality-promoting regularization (OPR), which encourages the projection vectors ... More
Decaying Dark Matter in Supersymmetric SU(5) ModelsNov 17 2009Apr 07 2010Motivated by recent observations from Pamela, Fermi and H.E.S.S., we consider dark matter decays in the framework of supersymmetric SU(5) grand unification theories. An SU(5) singlet S is assumed to be the main component of dark matters, which decays ... More
Federated Heavy Hitters with Differential PrivacyFeb 22 2019Jun 15 2019The discovery of heavy hitters (most frequent items) in user-generated data streams drives improvements in the app and web ecosystems, but can incur substantial privacy risks if not done with care. To address these risks, we propose a distributed and ... More
Coalitional Game Theoretic Approach for Cooperative Transmission in Vehicular NetworksFeb 28 2013Cooperative transmission in vehicular networks is studied by using coalitional game and pricing in this paper. There are several vehicles and roadside units (RSUs) in the networks. Each vehicle has a desire to transmit with a certain probability, which ... More
Cross-phase modulation instability in mode-locked laser based on reduced graphene oxideSep 29 2014Cross-phase modulation instability (XPMI) is experimentally observed in a fiber ring cavity with net normal dispersion and mode-locked by long fiber taper. The taper is deposited with reduced graphene oxide, which can decrease the threshold of XPMI due ... More
Graphene plasmonics for light trapping and absorption engineeringMay 12 2015Plasmonics can be used to improve absorption in optoelectronic devices and has been intensively studied for solar cells and photodetectors. Graphene has recently emerged as a powerful plasmonic material. It shows significantly less losses compared to ... More
NNS: The Case For Neural Network-based SortingJul 20 2019CPU-SIMD/GPU/TPUs will be increasingly powerful. The algorithm using neural network and heterogeneous computing framework will bring significant performance improvement. In this paper we prove a novel neural network-based sorting algorithm, NNS which ... More
Evidence of Different Formation Mechanisms for Hot versus Warm Super-EarthsMar 05 2015Using the Kepler planet sample from Buchhave et al. and the statistical method clarified by Schlaufman, I show that the shorter-period super-Earths have a different dependence on the host star metallicity from the longer-period super-Earths, with the ... More