Results for "Liang Feng"

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An Empirical Bayes Approach for High Dimensional ClassificationFeb 16 2017We propose an empirical Bayes estimator based on Dirichlet process mixture model for estimating the sparse normalized mean difference, which could be directly applied to the high dimensional linear classification. In theory, we build a bridge to connect ... More
Asymptotic minimax risk of predictive density estimation for non-parametric regressionOct 11 2010We consider the problem of estimating the predictive density of future observations from a non-parametric regression model. The density estimators are evaluated under Kullback--Leibler divergence and our focus is on establishing the exact asymptotics ... More
Indications of incommensurate spin fluctuations in doped triangular antiferromagnetsMar 29 2002Apr 24 2003The incommensurate spin fluctuation of the doped triangular antiferromagnet is studied within the t-J model. It is shown that the commensurate peak near the half-filling is split into six incommensurate peaks in the underdoped and optimally doped regimes. ... More
A Nonparametric Bayesian Approach for Sparse Sequence EstimationFeb 14 2017May 30 2017A nonparametric Bayes approach is proposed for the problem of estimating a sparse sequence based on Gaussian random variables. We adopt the popular two-group prior with one component being a point mass at zero, and the other component being a mixture ... More
Contrasting Spectral Signatures and Sensitivities of CPA-Lasing in a $\cal PT$-Symmetric Periodic StructureNov 11 2016The CPA-laser is a coexisting state of coherent perfect absorption and lasing that was proposed in parity-time ($\cal PT$) symmetric photonic systems. In this work we show that the spectral signature of a CPA-laser displayed by the singular value spectrum ... More
Topological multiband photonic superlatticesSep 24 2018Oct 19 2018A one-dimensional discrete lattice of dimers is known to possess topologically protected edge states when interdimer coupling is stronger than intradimer coupling. Here, we address richer topological properties of photonic superlattices having arbitrary ... More
Optical Reciprocity Induced Symmetry of the Scattering Eigenstates in Non-$\cal PT$-Symmetric HeterostructuresMay 23 2016The scattering matrix $S$ obeys the unitary relation $S^\dagger S=1$ in a Hermitian system and the symmetry property ${\cal PT}S{\cal PT}=S^{-1}$ in a Parity-Time (${\cal PT}$) symmetric system. Here we report a different symmetry relation of the $S$ ... More
$\mathcal{PT}$-symmetric microring laser-absorberJul 17 2014The lasing and coherent perfect absorption (CPA) properties of $\mathcal{PT}$-symmetric microrings with mixed index and gain gratings, externally coupled to a bus waveguide, are theoretically investigated. For a complex grating at the $\mathcal{PT}$ symmetry ... More
Tetraquark States with Open FlavorsMar 15 2016Jul 03 2016In this work, we estimate the masses of tetraquark states with four different flavors by virtue of QCD sum rules, in both $b$ and $c$ sectors. We construct four $[8_c]_{\bar{b} s} \otimes [8_c]_{\bar{d} u}$ tetraquark currents with $J^P = 0^+$, and then ... More
Mass Spectra of $0^{+-}$, $1^{-+}$, and $2^{+-}$ Exotic GlueballsSep 01 2015Jan 18 2016With appropriate interpolating currents the mass spectra of $0^{+-}$, $1^{-+}$, and $2^{+-}$ oddballs are studied in the framework of QCD sum rules (QCDSR). We find there exits one stable $0^{+-}$ oddball with mass of $4.57 \pm 0.13 \, \text{GeV}$, and ... More
Estimating the mass of the hidden charm $1^+(1^{+})$ tetraquark state via QCD sum rulesJul 25 2013Oct 27 2014By using QCD sum rules, the mass of the hidden charm tetraquark $[cu][\bar{c}\bar{d}]$ state with $I^{G} (J^{P}) = 1^+ (1^{+})$ (HCTV) is estimated, which presumably will turn out to be the newly observed charmonium-like resonance $Z_c^+(3900)$. In the ... More
Reply to "Comment on `Finding the $0^{--}$ Glueball'" [arXiv:1702.06634] and comment on `Is the exotic $0^{--}$ glueball a pure gluon state?' [arXiv:1611.08698]Apr 26 2017A Reply to "Comment on `Finding the $0^{--}$ Glueball' " [arXiv:1702.06634] and comment on `Is the exotic $0^{--}$ glueball a pure gluon state?' [arXiv:1611.08698]
Patterning graphene nanostripes in substrate-supported functionalized graphene: A promising route to integrated, robust, and superior transistorsJan 03 2012It is promising to apply quantum-mechanically confined graphene systems in field-effect transistors. High stability, superior performance, and large-scale integration are the main challenges facing the practical application of graphene transistors. Our ... More
Superconducting Properties of Two-Orbital t-t'-J-J' ModelsAug 20 2008Sep 02 2008Motivated by the recent contradiction of the superconducting pairing symmetry in the angle-resolved photoemission spectra (ARPES) and the nuclear magnetic resonance (NMR) data in the FeAs superconductors, we present the theoretical results on the phase ... More
Molecular states with hidden charm and strange in QCD Sum RulesSep 29 2013Jul 08 2014This work uses the QCD Sum Rules to study the masses of the $D_s \bar{D}_s^*$ and $D_s^* \bar{D}_s^*$ molecular states with quantum numbers $J^{PC} = 1^{+-}$. Interpolating currents with definite C-parity are employed, and the contributions up to dimension ... More
Finding the $0^{--}$ GlueballAug 18 2014Oct 24 2014With appropriate interpolating currents the mass spectrum of $0^{--}$ oddball is obtained in the framework of QCD Sum Rules (QCDSR). We find there are two stable oddballs with masses of $3.81 \pm 0.12 \, \text{GeV}$ and $4.33 \pm 0.13 \, \text{GeV}$, ... More
Interpretation of $Z_c(4025)$ as the Hidden Charm Tetraquark States via QCD Sum RulesAug 15 2013Mar 04 2014By using QCD Sum Rules, we found that the charged hidden charm tetraquark $[c u][\bar{c} \bar{d}]$ states with $ J^P = 1^-$ and $ 2^+$, which are possible quantum numbers of the newly observed charmonium-like resonance $Z_c(4025)$, have masses of $m_{1^-}^c ... More
Semantic Object Parsing with Graph LSTMMar 23 2016By taking the semantic object parsing task as an exemplar application scenario, we propose the Graph Long Short-Term Memory (Graph LSTM) network, which is the generalization of LSTM from sequential data or multi-dimensional data to general graph-structured ... More
Bifurcation of limit cycles by perturbing a piecewise linear Hamiltonian system with a homoclinic loopSep 29 2011In this paper, we study limit cycle bifurcations for a kind of non-smooth polynomial differential systems by perturbing a piecewise linear Hamiltonian system with a center at the origin and a homoclinic loop around the origin. By using the first Melnikov ... More
A Three-Flavor AdS/QCD Model with a Back-Reacted GeometryMay 16 2007Jun 02 2007A fully back-reaction geometry model of AdS/QCD including the strange quark is described. We find that with the inclusion of the strange quark the impact on the metric is very small and the final predictions are changed only negligibly.
The Use of Unlabeled Data in Predictive ModelingOct 25 2007The incorporation of unlabeled data in regression and classification analysis is an increasing focus of the applied statistics and machine learning literatures, with a number of recent examples demonstrating the potential for unlabeled data to contribute ... More
Improved minimax predictive densities under Kullback--Leibler lossMay 16 2006Let $X| \mu \sim N_p(\mu,v_xI)$ and $Y| \mu \sim N_p(\mu,v_yI)$ be independent p-dimensional multivariate normal vectors with common unknown mean $\mu$. Based on only observing $X=x$, we consider the problem of obtaining a predictive density $\hat{p}(y| ... More
Superconductivity in Na$_{x}$CoO$_{2}\cdot y$H$_{2}$O driven by the kinetic energyMay 10 2005Within the charge-spin separation fermion-spin theory, the mechanism of superconductivity in Na$_{x}$CoO$_{2}\cdot y$H$_{2}$O is studied. It is shown that dressed fermions interact occurring directly through the kinetic energy by exchanging magnetic excitations. ... More
Unusual charge transport and spin response of doped bilayer triangular antiferromagnetsMay 11 2003Jun 02 2003Within the t-J model, the charge transport and spin response of the doped bilayer triangular antiferromagnet are studied by considering the bilayer interaction. Although the bilayer interaction leads to the band splitting in the electronic structure, ... More
QCD Evolution of the Transverse Momentum Dependent CorrelationsDec 24 2008We study the QCD evolution for the twist-three quark-gluon correlation functions associated with the transverse momentum odd quark distributions. Different from that for the leading twist quark distributions, these evolution equations involve more general ... More
Z_3 Symmetry and Neutrino Mixing in Type II SeesawDec 28 2006Neutrino mixing matrix satisfying the current experimental data can be well described by the HPS tri-bimaximal mixing matrix. We propose that its origin can be understood within the seesaw framework by a hidden condition on the mass matrix of heavy right-handed ... More
Centralizing Traces and Lie Triple Isomorphisms on Triangular AlgebrasJan 10 2013Let $\mathcal{T}$ be a triangular algebra over a commutative ring $\mathcal{R}$ and $\mathcal{Z(T)}$ be the center of $\mathcal{T}$. Suppose that ${\mathfrak q}\colon \mathcal{T}\times \mathcal{T}\longrightarrow \mathcal{T}$ is an $\mathcal{R}$-bilinear ... More
Manipulating Edge Majorana Fermions in Vortex StateDec 28 2011A vortex in a model spinless px+ipy superconductor induces two Majorana fermions (MFs), one in the core and the other at the sample edge. In the present work, we show that edge MF can be generated, fused, transported, and braided easily by tuning gate ... More
General Monogamy Relations for Multiqubit W-class States in terms of negativity and squared Rényi-$α$ entanglementMar 28 2017Apr 24 2017For multipartite entangled states, entanglement monogamy is an important property. We investigate the monogamy relations for multiqubit generalized W-class states. We present new analytical monogamy inequalities satisfied by the $x$-th power of the dual ... More
A Variational Algorithm for Bayesian Variable SelectionFeb 24 2016There has been an intense development on the estimation of a sparse regression coefficient vector in statistics, machine learning and related fields. In this paper, we focus on the Bayesian approach to this problem, where sparsity is incorporated by the ... More
Problem Complexity Research from Energy PerspectiveSep 16 2013Computational complexity is a particularly important objective. The idea of Landauer principle was extended through mapping three classic problems (sorting,ordered searching and max of N unordered numbers) into Maxwell demon thought experiment in this ... More
The Phase Shifts of the Paired Wings of Butterfly DiagramsJun 11 2010Sunspot groups observed by Royal Greenwich Observatory/US Air Force/NOAA from May 1874 to November 2008 and the Carte Synoptique solar filaments from March 1919 to December 1989 are used to investigate the relative phase shift of the paired wings of butterfly ... More
Ratchet potential and rectification effect in Majorana fermion SQUIDApr 25 2012Motivated by a recent experimental progress in realizing Majorana fermions (MFs) in a heterostructure of a spin-orbit coupling nanowire and superconductor (V. Mourik et al., Science.1222360), we investigate a SQUID formed by the novel superconductor-nanowire-superconductor ... More
Topological Single Electron Pumping Assisted by Majorana FermionsFeb 14 2013Single electron pumping based on the topological property of Majorana fermions (MFs) is proposed. The setup consists of a quantum dot and four nano topological superconductors (TSs) connected by constriction junctions, with an additional vortex located ... More
Next-to-next-to-leading-order QCD corrections to $χ_{c0,2}\rightarrow γγ$Nov 19 2015Dec 22 2015We calculate the next-to-next-to-leading-order (NNLO) perturbative corrections to $P$-wave quarkonia annihilation decay to two photons, in the framework of nonrelativistic QCD (NRQCD) factorization. The order-$\alpha_s^2$ short-distance coefficients associated ... More
Survival rate of initial azimuthal anisotropy in a multi-phase transport modelAug 13 2015Sep 10 2015We investigate the survival rate of an initial momentum anisotropy (${v}_2^{ini}$), not spatial anisotropy, to the final state in a multi-phase transport (AMPT) model in Au+Au collisions at $\sqrt{s_{NN}}$=200~GeV. It is found that both the final-state ... More
Accurate First-Principles Electrochemical Phase Diagrams for Ti Oxides from Density Functional CalculationsNov 17 2015Developing an accurate simulation method for the electrochemical stability of solids, as well as understanding the physics related with its accuracy, is critically important for improving the performance of compounds and predicting the stability of new ... More
Transverse momentum dependent quark distributions and polarized Drell-Yan processesSep 11 2009We study the spin-dependent quark distributions at large transverse momentum. We derive their transverse momentum behaviors in the collinear factorization approach in this region. We further calculate the angular distribution of the Drell-Yan lepton pair ... More
Hyperon Polarization in Unpolarized Scattering ProcessesAug 27 2008Transverse polarization in the Hyperon production in the unpolarized deep inelastic scattering and pp collisions is studied in the twist-three approach, considering the contribution from the quark-gluon-antiquark correlation distribution in nucleon. We ... More
Variants of the PSS preconditioner for generalized saddle point problems from the Navier-Stokes equationsFeb 28 2018Oct 01 2018In this paper, a class of new preconditioners based on matrix splitting are presented for generalized saddle-point linear systems, which can be viewed as further modified improvements of some recently published preconditioners. Moreover, we widen the ... More
An Iterative BP-CNN Architecture for Channel DecodingJul 18 2017Inspired by recent advances in deep learning, we propose a novel iterative BP-CNN architecture for channel decoding under correlated noise. This architecture concatenates a trained convolutional neural network (CNN) with a standard belief-propagation ... More
Electron heating and acceleration by magnetic reconnection in hot accretion flowsNov 24 2009Both analytical and numerical works show that magnetic reconnection must occur in hot accretion flows. This process will effectively heat and accelerate electrons. In this paper we use the numerical hybrid simulation of magnetic reconnection plus test-electron ... More
On the evaporation of solar dark matter: spin-independent effective operatorsJun 07 2016Sep 18 2016As a part of the effort to investigate the implications of dark matter (DM)-nucleon effective interactions on the solar DM detection, in this paper we focus on the evaporation of the solar DM for a set of the DM-nucleon spin-independent (SI) effective ... More
Long-range self-interacting dark matter in the SunMay 15 2015Dec 11 2015We investigate the implications of the long-rang self-interaction on both the self-capture and the annihilation of the self-interacting dark matter (SIDM) trapped in the Sun. Our discussion is based on a specific SIDM model in which DM particles self-interact ... More
Optical properties and Mechanical properties of C, Si, Ge and 3C-SiC Materials Calculated from First Principles TheoryJan 09 2013Jan 15 2013First-principles calculations based on Density functional theory (DFT) and Heyd, Scuseria and Ernzerhof (HSE) adopt PBE approximation-a new version of the generalized gradient approximation (GGA). It has studied lattice parameter, electronic structure, ... More
Centralizing traces and Lie triple isomorphisms on generalized matrix algebrasNov 22 2014Let $\mathcal{G}$ be a generalized matrix algebra over a commutative ring $\mathcal{R}$ and $\mathcal{Z(G)}$ be the center of $\mathcal{G}$. Suppose that ${\mathfrak q}\colon \mathcal{G}\times \mathcal{G}\longrightarrow \mathcal{G}$ is an $\mathcal{R}$-bilinear ... More
Quark charge balance function and hadronization effects in relativistic heavy ion collisionsMar 05 2012Apr 17 2012We calculate the charge balance function of the bulk quark system before hadronization and those for the directly produced and the final hadron system in high energy heavy ion collisions. We use the covariance coefficient to describe the strength of the ... More
Anharmonic effect on lattice distortion, orbital ordering and magnetic properties in Cs2AgF4Aug 20 2008We develop the cluster self-consistent field method incorporating both electronic and lattice degrees of freedom to study the origin of ferromagnetism in Cs$_{2}$AgF$_{4}$. After self-consistently determining the harmonic and anharmonic Jahn-Teller distortions, ... More
Upper limits on DM annihilation cross sections from the first AMS-02 antiproton dataApr 17 2015Aug 27 2015The first measurement on the antiproton to proton ratio made by the AMS-02 collaboration agrees with the expection from conventional cosmic-ray secondaries in the kinetic energy range $\sim 10-100$ GeV, which can be turned into stringent upper limits ... More
ICE: Information Credibility Evaluation on Social Media via Representation LearningSep 29 2016Oct 24 2016With the rapid growth of social media, rumors are also spreading widely on social media and bring harm to people's daily life. Nowadays, information credibility evaluation has drawn attention from academic and industrial communities. Current methods mainly ... More
Critical Current Anomaly at the Topological Quantum Phase Transition in a Majorana Josephson JunctionJul 21 2017Majorana bound states in topological Josephson junctions induce a 4? period current-phase relation. Direct detection of the 4? periodicity is complicated by the quasiparticle poisoning. We reveal that Majorana bound states are also signaled by the anomalous ... More
Heat transport of electron-doped CobaltatesJan 15 2006Jul 03 2006Within the t-J model, the heat transport of electron-doped cobaltates is studied based on the fermion-spin theory. It is shown that the temperature dependent thermal conductivity is characterized by the low temperature peak located at a finite temperature. ... More
Study of the quasi-two-body decays B^{0}_{s} \rightarrow ψ(3770)π^+π^- with perturbative QCD approachOct 30 2018In this note, we study the contributions from the S-wave resonances, f_{0}(980) and f_{0}(1500), to the B^{0}_{s}\rightarrow \psi(3770)\pi^ {+}\pi^{-} decay by introducing the S-wave \pi\pi distribution amplitudes within the framework of the perturbative ... More
X(16.7) Production in Electron-Position CollisionJul 14 2016Jun 04 2018The anomaly found in the excited $^8\text{Be}$ nuclear transition to its ground state is attributed to a spin-1 gauge boson $X(16.7)$. To hunt for this boson, we propose two traps: $e^+e^-\to X\gamma$ and $J/\psi\to X\gamma$, both following with $X\to ... More
A Practical Localization Algorithm Based on Wireless Sensor NetworksNov 13 2010Many localization algorithms and systems have been developed by means of wireless sensor networks for both indoor and outdoor environments. To achieve higher localization accuracy, extra hardware equipments are utilized by most of the existing localization ... More
Data-driven subtraction of anisotropic flows in jet-like correlation studies in heavy-ion collisionsFeb 16 2019Background: Measurements of two-particle azimuthal angle correlation are an useful tool to study the distribution of jet energy loss, however, they are complicated because of the significant anisotropic flow background. Purpose: We devise a data-driven ... More
Phonon Properties, Thermal Expansion, and Thermomechanics of Silicene and GermaneneMar 10 2015May 11 2015We report a hierarchical first-principles investigation on the entangled effects of lattice dimensionality and bond characteristics in the lattice dynamics of silicene and germanene. It is found that bond bending (stretching) negatively (positively) contributes ... More
Extracting jet transport parameter $\hat{q}$ from a multiphase transport modelFeb 02 2019Within a multi-phase transport model with string melting scenario, jet transport parameter $\hat{q}$ is calculated in Au+Au collisions at $\sqrt{s_{NN} } $= 200 GeV and Pb+Pb collisions at $\sqrt{s_{NN} } $= 2.76 TeV. The $\hat{q}$ increases with the ... More
Deep joint rain and haze removal from single imagesJan 21 2018Rain removal from a single image is a challenge which has been studied for a long time. In this paper, a novel convolutional neural network based on wavelet and dark channel is proposed. On one hand, we think that rain streaks correspond to high frequency ... More
PAC-Bayesian AUC classification and scoringOct 07 2014Oct 13 2014We develop a scoring and classification procedure based on the PAC-Bayesian approach and the AUC (Area Under Curve) criterion. We focus initially on the class of linear score functions. We derive PAC-Bayesian non-asymptotic bounds for two types of prior ... More
Proposal for Manipulation of Majorana Fermions in Nano-Patterned Semiconductor-Superconductor HeterostructureFeb 16 2013We investigate a heterostructure system with a spin-orbit coupled semiconductor sandwiched by an s-wave superconductor and a ferromagnetic insulator, which supports Majorana fermions (MFs) at the superconducting vortex cores. We propose a scheme of transporting ... More
Determining $1^{--}$ Heavy Hybrid Masses via QCD Sum RulesDec 13 2010Dec 04 2011The masses of $1^{--}$ charmonium and bottomonium hybrids are evaluated in terms of QCD sum rules. We find that the ground state hybrid in charm sector lies in $m_{H_c}=4.12\sim 4.79$ GeV, while in bottom sector the hybrid may situated in $m_{H_b} = 10.24\sim ... More
Scattering in $\cal PT$ and $\cal RT$ Symmetric Multimode Waveguides: Generalized Conservation Laws and Spontaneous Symmetry Breaking beyond One DimensionOct 27 2015We extend the generalize conservation law of light propagating in a one-dimensional $\cal PT$-symmetric system, i.e., $|T-1|=\sqrt{R_LR_R}$ for the transmittance $T$ and the reflectance $R_{L,R}$ from the left and right, to a multimode waveguide with ... More
Implications of the first AMS-02 antiproton data for dark matterAug 27 2015The implications of the first AMS-02 $\bar p/p$ data for the propagation of cosmic rays and the properties of dark matter (DM) are discussed. Using various diffusive re-acceleration (DR) propagation models, one can derive very conservative upper limits ... More
Cosmic ray propagation and dark matter in light of the latest AMS-02 dataOct 01 2014Aug 22 2015The AMS-02 experiment is measuring the high energy charged cosmic rays with unprecedented accuracy. We explore the possibility of determining the cosmic-ray propagation models using the AMS-02 data $alone$. A global Bayesian analysis of the constraints ... More
Charge transport of electron doped Mott insulators on a triangular latticeNov 25 2003Jun 23 2004The charge transport of electron doped Mott insulators on a triangular lattice is investigated within the t-J model based on the partial charge-spin separation fermion-spin theory. The conductivity spectrum shows a low-energy peak and the unusual midinfrared ... More
NNLO QCD Corrections to $γ+ η_c(η_b)$ Exclusive Production in Electron-Positron CollisionOct 22 2017Based on the NRQCD factorization formalism, we calculate the next-to-next-to-leading order QCD corrections to the heavy quarkonium $\eta_c (\eta_b)$ production associated with a photon at electron-positron colliders. By matching the amplitudes calculated ... More
Two-Loop integrals for CP-even heavy quarkonium production and decaysMar 11 2017Apr 08 2017By employing the method of differential equations, we compute the various types of two-loop master integrals involved in CP-even heavy quarkonium exclusive production and decays. All the integrals presented in this paper can be casted into canonical forms ... More
Cross-Domain Visual Matching via Generalized Similarity Measure and Feature LearningMay 13 2016Cross-domain visual data matching is one of the fundamental problems in many real-world vision tasks, e.g., matching persons across ID photos and surveillance videos. Conventional approaches to this problem usually involves two steps: i) projecting samples ... More
Compositional Learning of Relation Path Embedding for Knowledge Base CompletionNov 22 2016Feb 24 2017Large-scale knowledge bases have currently reached impressive sizes; however, these knowledge bases are still far from complete. In addition, most of the existing methods for knowledge base completion only consider the direct links between entities, ignoring ... More
Performance of Local Information Based Link Prediction: A Sampling PerspectiveJul 08 2011Link prediction is pervasively employed to uncover the missing links in the snapshots of real-world networks, which are usually obtained from kinds of sampling methods. Contrarily, in the previous literature, in order to evaluate the performance of the ... More
Landau-Zener-Stückelberg Interferometry for Majorana QubitJul 28 2016Jul 29 2016Stimulated by a very recent experiment observing successfully two superconducting states with even- and odd-number of electrons in a nanowire topological superconductor as expected from the existence of two end Majorana quasiparticles (MQs) [Albrecht ... More
Quantum Anomalous Hall Effect in a Perovskite and Inverse-Perovskite Sandwich StructureDec 17 2015Based on first-principles calculations, we propose a sandwich structure composed of a G-type anti-ferromagnetic (AFM) Mott insulator LaCrO$_3$ grown along the [001] direction with one atomic layer replaced by an inverse-perovskite material Sr$_3$PbO. ... More
Electrically Tunable Topological State in [111] Perovskite Materials with Antiferromagnetic Exchange FieldJan 17 2013A topological state with simultaneous nonzero Chern number and spin Chern number is possible for electrons on honeycomb lattice based on band engineering by staggered electric potential and antiferromagnetic exchange field in presence of intrinsic spin-orbit ... More
Searching for Dark Matter Signals in the Left-Right Symmetric Gauge Model with CP SymmetryAug 26 2010Nov 16 2010We investigate singlet scalar dark matter (DM) candidate in a left-right symmetric gauge model with two Higgs bidoublets (2HBDM) in which the stabilization of the DM particle is induced by the discrete symmetries P and CP. According to the observed DM ... More
Unidirectional emission in an all-dielectric nanoantennaOct 15 2018All-dielectric nanoantennas are a promising alternative to plasmonic optical antennas for engineering light emission because of their low-loss nature in the optical spectrum. Nevertheless, it is still challenging to manipulate directional light emission ... More
A Generic Framework for Interesting Subspace Cluster Detection in Multi-attributed NetworksSep 15 2017Sep 20 2018Detection of interesting (e.g., coherent or anomalous) clusters has been studied extensively on plain or univariate networks, with various applications. Recently, algorithms have been extended to networks with multiple attributes for each node in the ... More
Non-Hermitian heterostructure for two-parameter sensingFeb 25 2019Mar 20 2019Non-Hermitian systems at the exceptional point (EP) degeneracy are demonstrated to be highly sensitive to environmental perturbation. Here, we propose and theoretically investigate a novel multilayered heterostructure favoring double EPs for a unique ... More
Supercharge optical arraysSep 15 2018Oct 06 2018We introduce the notion of a supercharge optical array synthesized according to supersymmetric charge operators. Starting from an arbitrary array, mathematical supersymmetry transformation can be used systematically to create a zero-energy physical state ... More
All-fiber generation of 29-fs pulses at 1.3-μm via Cherenkov radiationMay 26 2016We have experimentally demonstrated the all-fiber generation of 1.3-{\mu}m femtosecond pulses via Cherenkov radiation (CR) from an ultrafast Er-doped fiber laser. The experiment shows that the pulses maintain below 40 fs in the range from 1270 to 1315 ... More
High-energy neutrino flare from cloud-jet interaction in the blazar PKS 0502+049Aug 13 2018Aug 14 2018Following the detection of a $\sim$300 TeV neutrino potentially associated with the flaring blazar TXS 0506+056, an excess of neutrinos around its position in 2014-2015 was revealed by IceCube. However, its contemporaneous quiescence in $\gamma$-rays ... More
Transaction fees and optimal rebalancing in the growth-optimal portfolioSep 20 2010Jan 06 2011The growth-optimal portfolio optimization strategy pioneered by Kelly is based on constant portfolio rebalancing which makes it sensitive to transaction fees. We examine the effect of fees on an example of a risky asset with a binary return distribution ... More
A nonlinear tracking algorithm with range-rate measurements based on unbiased measurement conversionDec 12 2014The three-dimensional CMKF-U with only position measurements is extended to solve the nonlinear tracking problem with range-rate measurements in this paper. A pseudo measurement is constructed by the product of range and range-rate measurements to reduce ... More
Metal-insulator transition in half-filling two-orbital Hubbard model on triangular latticeSep 26 2007Aug 27 2008We have investigated the half-filling two-orbital Hubbard model on a triangular lattice by means of the dynamical mean-field theory (DMFT). The densities of states and optical conductivity clearly show the occurence of metal-insulating transition (MIT) ... More
Exploration of decaying dark matter in a left-right symmetric modelJan 03 2010$SU(2)_L$ triplet scalars appear in models motivated for the left-right symmetry, neutrino masses and dark matter (DM), etc.. If the triplets are the main decay products of the DM particle, and carry nonzero lepton numbers, they may decay dominantly into ... More
Topological states of non-Dirac electrons on triangular latticeJul 28 2014We demonstrate the possibility of topological states for non-Dirac electrons. Specifically it is shown that, because of the $C_{\rm 3}$ crystal symmetry and time reversal symmetry, $p_x$ and $p_y$ orbits accommodated on triangular lattice exhibit a quadratic ... More
Viewing Majorana Bound States by Rabi OscillationsJun 05 2014Rabi oscillation is a pure quantum phenomenon where the system jumps forth and back between two quantum levels under stimulation of a microwave, and a resonance occurs when the energy difference is matched by the photon energy. Rabi oscillations have ... More
Astrophysical background and dark matter implication based on latest AMS-02 dataJan 09 2017Jun 29 2018The cosmic ray(CR) positrons and antiprotons are often regarded as the collision products of CR nucleons with the interstellar medium. However this conclusion is challenged by recent experimental data. In this work, we choose the latest AMS-02 data to ... More
X(16.7) as the Solution of NuTeV AnomalyJul 28 2016Mar 13 2017A recent experimental study of excited $^{8}\!Be$ decay to its ground state reveals an anomaly in the final states angle distribution. This exceptional result is attributed to a new vector gauge boson X(16.7). We study the significance of this new boson, ... More
Exploring Final State Hadron Structure and SU(3) Flavor Symmetry Breaking Effects in D->PP and D->PV DecaysMay 10 2004Jun 07 2005The nonleptonic two body decays $D\to PP$ and $D\to PV$ are investigated based on the diagrammatic decomposition in a generalized factorization formalism. It is shown that to fit the experimental data, the SU(3) flavor symmetry breaking effects of the ... More
Glauber Gluon Effects in Soft Collinear FactorizationAug 05 2017Effects of Glauber gluons in soft collinear factorization, which cause the elastic scattering process between collinear particles, are studied in the frame of soft-collinear effective theory(SCET). Glauber modes are added into the Lagrangian before integrated ... More
A new humanlike facial attractiveness predictor with cascaded fine-tuning deep learning modelNov 08 2015This paper proposes a deep leaning method to address the challenging facial attractiveness prediction problem. The method constructs a convolutional neural network of facial beauty prediction using a new deep cascaded fine-turning scheme with various ... More
Towards Optimal Power Control via Ensembling Deep Neural NetworksJul 26 2018Mar 10 2019A deep neural network (DNN) based power control method is proposed, which aims at solving the non-convex optimization problem of maximizing the sum rate of a multi-user interference channel. Towards this end, we first present PCNet, which is a multi-layer ... More
Coherence assisted resonance with sub-lifetime-limited linewidthAug 31 2012We demonstrate a novel approach to obtain resonance linewidth below that limited by coherence lifetime. Cross correlation between induced intensity modulation of two lasers coupling the target resonance exhibits a narrow spectrum. 1/30 of the lifetime-limited ... More
Orbital Order Instability and Orbital Excitations in Degenerate Itinerant Electron SystemsMay 15 2006We present the theory of orbital ordering in orbital-degenerate itinerant electron systems. After proposing the criterion of instability for orbital ordering or orbital density wave ordering, we find that the orbital and the spin-orbital collective excitation ... More
A New Splitting Method for Time-dependent Convection-dominated Diffusion ProblemsFeb 17 2013We present a new splitting method for time-dependent convection-dominated diffusion problems. The original convection diffusion system is split into two sub-systems: a pure convection system and a diffusion system. At each time step, a convection problem ... More
Enhancing Gaussian Estimation of Distribution Algorithm by Exploiting Evolution Direction with ArchiveFeb 25 2018Jul 31 2018As a typical model-based evolutionary algorithm (EA), estimation of distribution algorithm (EDA) possesses unique characteristics and has been widely applied to global optimization. However, the common-used Gaussian EDA (GEDA) usually suffers from premature ... More
Opposite spin accumulations on the transverse edges by the confining potentialApr 21 2006Apr 27 2006We show that the spin-orbit interaction induced by the boundary confining potential causes opposite spin accumulations on the transverse edges in a zonal two-dimensional electron gas in the presence of external longitudinal electric field. While the bias ... More
Performance Benefits of DataMPI: A Case Study with BigDataBenchMar 14 2014Apache Hadoop and Spark are gaining prominence in Big Data processing and analytics. Both of them are widely deployed on Internet companies. On the other hand, high-performance data analysis requirements are causing academical and industrial communities ... More
Speeding Up Neural Machine Translation Decoding by Cube PruningSep 09 2018Although neural machine translation has achieved promising results, it suffers from slow translation speed. The direct consequence is that a trade-off has to be made between translation quality and speed, thus its performance can not come into full play. ... More