Results for "Jian-Pin Wu"

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Transport phenomena and Weyl correction in effective holographic theory of momentum dissipationFeb 08 2019We construct a higher derivative theory involving an axionic field and the Weyl tensor in four dimensional spacetime. Up to the first order of the coupling parameters, the charged black brane solution with momentum dissipation in a perturbative manner ... More
Holographic fermionic spectrum from Born-Infeld AdS black holeMay 18 2017In this letter, we systematically explore the holographic (non-)relativistic fermionic spectrum without/with dipole coupling dual to Born-Infeld anti-de Sitter (BI-AdS) black hole. For the relativistic fermionic fixed point, this holographic fermionic ... More
Momentum dissipation and holographic transport without self-dualitySep 15 2016Oct 13 2016We implement the momentum dissipation introduced by spatial linear axionic fields in a holographic model without self-duality, broke by Weyl tensor coupling to Maxwell field, and study its response. It is found that for the positive Weyl coupling parameter ... More
Particle motion and chaosJul 02 2018In this note, we explicitly illuminate that the velocity bound in the gravity corresponds to the chaos bound in the quantum system by studying the particle free falling in hyperscaling violating (HV) black brane. We also study the particle falling in ... More
EM duality and Quasi-normal modes from higher derivatives with homogeneous disorderDec 30 2018We study the electromagnetic (EM) duality from $6$ derivative theory with homogeneous disorder. We find that with the change of the sign of the coupling parameter $\gamma_1$ of the $6$ derivative theory, the particle-vortex duality with homogeneous disorder ... More
Quasi-normal modes of holographic system with Weyl correction and momentum dissipationApr 29 2018We study the charge response in complex frequency plane and the quasi-normal modes (QNMs) of the boundary quantum field theory with momentum dissipation dual to a probe generalized Maxwell system with Weyl correction. When the strength of the momentum ... More
Holographic superconductivity from higher derivative theoryOct 22 2017We construct a $6$ derivative holographic superconductor model in the $4$-dimensional bulk spacetimes, in which the normal state describes a quantum critical (QC) phase. The phase diagram $(\gamma_1,\hat{T}_c)$ and the condensation as the function of ... More
Thermal transport and quasi-normal modes in Gauss-Bonnet-axions theoryFeb 06 2017May 03 2017We obtain the black brane solution in arbitrary dimensional Gauss-Bonnet-axions (GBA) gravity theory. And then the thermal conductivity of the boundary theory dual to this neutral black brane is explored. We find that the momentum dissipation suppresses ... More
A Novel Insulator by Holographic Q-latticesOct 19 2015Feb 19 2016We construct a bulk geometry with Q-lattice structure, which is implemented by two gauge fields and a coupling between the lattice and the Maxwell field. This gravity dual model can describe a novel insulator which exhibits some key features analogous ... More
Note on the butterfly effect in holographic superconductor modelsOct 23 2016Mar 17 2017In this note we remark that the butterfly effect can be used to diagnose the phase transition of superconductivity in a holographic framework. Specifically, we compute the butterfly velocity in a charged black hole background as well as anisotropic backgrounds ... More
Transport coefficients from hyperscaling violating black brane: shear viscosity and conductivityNov 10 2015Nov 16 2015We investigate two transport coefficients, shear viscosity and conductivity, in a non-relativistic boundary filed theory without hyperscaling symmetry, which is dual to a bulk charged hyperscaling violating black brane. Employing matching method, we obtain ... More
Characterization of Quantum Phase Transition using Holographic Entanglement EntropyApr 17 2016Jun 19 2016The entanglement exhibits extremal or singular behavior near quantum critical points (QCPs) in many condensed matter models. These intriguing phenomena, however, still call for a widely accepted understanding. In this letter we study this issue in holographic ... More
Holographic fermionic spectrum with Weyl correctionFeb 25 2018We study the ferminoic spectrum with Weyl correction, which exhibits the non-Fermi liquid behavior. Also, we find that both the height of the peak of the fermionic spectrum and the dispersion relation exhibit a nonlinearity with the variety of the Weyl ... More
DC and Hall conductivity in holographic massive Einstein-Maxwell-Dilaton gravityApr 02 2015Aug 18 2015We investigate the holographic DC and Hall conductivity in massive Einstein-Maxwell-Dilaton (EMD) gravity. Two special EMD backgrounds are considered explicitly. One is dyonic Reissner-Nordstr$\ddot{o}$m-AdS (RN-AdS) geometry and the other one is hyperscaling ... More
Anomaly freedom in perturbative models of Euclidean loop quantum gravitySep 12 2018Euclidean gravity provides an interesting test system for an analysis of cosmological perturbations in an effective Hamiltonian constraint with holonomy modifications from loop quantum gravity. This paper presents a discussion of scalar modes, with a ... More
A simple holographic model for spontaneous breaking of translational symmetryAug 09 2018Mar 18 2019It has been shown that holographic massive gravities can effectively realize the states with spontaneous breaking of translational symmetry in a homogenous manner. In this work, we consider a toy model of such category by adding a special gauge-axion ... More
Holography of electrically and magnetically charged black branesJul 20 2018Mar 12 2019We construct a new class of black brane solutions in Einstein-Maxwell-dilaton (EMD) theory, which is characterized by two parameters $a,b$. Based on the obtained solutions, we make detailed analysis on the ground state in zero temperature limit and find ... More
Scalar Boundary Conditions in Hyperscaling Violating GeometryDec 11 2015We study the possible boundary conditions of scalar field modes in a hyperscaling violation(HV) geometry with Lifshitz dynamical exponent $z (z\geqslant1)$ and hyperscaling violation exponent $\theta (\theta\neq0)$. For the case with $\theta>0$, we show ... More
Holographic Butterfly Effect at Quantum Critical PointsOct 09 2016Oct 23 2017When the Lyapunov exponent $\lambda_L$ in a quantum chaotic system saturates the bound $\lambda_L\leqslant 2\pi k_BT$, it is proposed that this system has a holographic dual described by a gravity theory. In particular, the butterfly effect as a prominent ... More
Holographic incoherent transport in Einstein-Maxwell-dilaton GravityDec 04 2015Dec 01 2016Recent progress in the holographic approach makes it more transparent that each conductivity can be decomposed into the coherent contribution due to momentum relaxation and the incoherent contribution due to intrinsic current relaxation. In this paper ... More
The Effect of Anisotropy on Holographic Entanglement Entropy and Mutual InformationMay 16 2019We study the effect of anisotropy on holographic entanglement entropy (HEE) and holographic mutual information (MI) in the Q-lattice model, by exploring the HEE and MI for infinite strips along arbitrary directions. We find that the lattice always enhances ... More
Holographic superconductor on a novel insulatorNov 21 2017Jan 09 2018We construct a holographic superconductor model, based on a gravity theory, which exhibits novel metal-insulator transitions. We investigate the condition for the condensation of the scalar field over the parameter space, and then focus on the superconductivity ... More
The pseudo-gap phase and the duality in holographic fermionic system with dipole coupling on Q-latticeFeb 19 2016We classify the different phases by the "pole-zero mechanism" for a holographic fermionic system which contains a dipole coupling with strength $p$ on a Q-lattice background. A complete phase structure in $p$ space can be depicted in terms of Fermi liquid, ... More
The Stückelberg Holographic Superconductors with Weyl correctionsJan 12 2012In this letter we construct the St\"{u}ckelberg holographic superconductor with Weyl corrections. Under such corrections, the Weyl coupling parameter $\gamma$ plays an important role in the order of phase transitions and the critical exponents of second ... More
Holographic response from higher derivatives with homogeneous disorderMay 18 2017In this letter, we study the charge response from higher derivatives over the background with homogeneous disorder introduced by axions. We first explore the bounds on the higher derivatives coupling from DC conductivity and the anomalies of causality ... More
The Lifshitz black branes and DC transport coefficients in massive Einstein-Maxwell-dilaton gravitySep 09 2017Mar 13 2018We construct analytical Lifshitz massive black brane solutions in massive Einstein-Maxwell-dilaton gravity theory. We also study the thermodynamics of these black brane solutions and obtain the thermodynamical stability conditions. On the dual nonrelativistic ... More
Building a doped Mott system by holographyJul 09 2015Oct 23 2015We construct a holographic model in the framework of Q-lattices whose dual exhibits metal-insulator transitions. By introducing an interacting term between the Q-lattice and the electromagnetic field in bulk geometry, we find such kind of transition can ... More
Holographic Lattice in Einstein-Maxwell-Dilaton GravitySep 18 2013Sep 25 2013We construct an ionic lattice background in the framework of Einstein-Maxwell-dilaton theory in four dimensional space time. The optical conductivity of the dual field theory on the boundary is investigated. Due to the lattice effects, we find the imaginary ... More
Holographic Metal-Insulator Transition in Higher Derivative GravityJun 25 2016Jan 12 2017We introduce a Weyl term into the Einstein-Maxwell-Axion theory in four dimensional spacetime. Up to the first order of the Weyl coupling parameter $\gamma$, we construct charged black brane solutions without translational invariance in a perturbative ... More
Analytical study of the holographic superconductor from higher derivative theoryFeb 19 2019Feb 23 2019In this paper, we analytically study the holographic superconductor models with the high derivative (HD) coupling terms. Using the Sturm-Liouville (SL) eigenvalue method, we perturbatively calculate the critical temperature. The analytical results are ... More
Weyl corrections to diffusion and chaos in holographyOct 22 2017Apr 23 2018Using holographic methods in the Einstein-Maxwell-dilaton-axion (EMDA) theory, it was conjectured that the thermal diffusion in a strongly coupled metal without quasi-particles saturates an universal lower bound that is associated with the chaotic property ... More
Holographic transports from Born-Infeld electrodynamics with momentum dissipationMay 21 2018Jun 15 2018We construct the Einstein-axions AdS black hole from Born-Infeld electrodynamics. Various DC transport coefficients of the dual boundary theory are computed. The DC electric conductivity depends on the temperature, which is a novel property comparing ... More
Entanglement of Purification in Holographic SystemsFeb 06 2019Mar 18 2019The holographic entanglement of purification (EoP) in AdS$_{4}$ and AdS-RN black hole backgrounds is studied. We develop an algorithm to compute the EoP for bipartite configuration with infinitely long strips. The temperature behavior of EoP is revealed ... More
The 3+1 holographic superconductor with Weyl correctionsOct 10 2010Feb 16 2011In this paper we study $3+1$ holographic superconductors with Weyl corrections. We find that the critical temperature of a superconductor with Weyl corrections increases as we amplify the Weyl coupling parameter $\gamma$, indicating the condensation will ... More
Evolutions of entanglement and complexity after a thermal quench in massive gravity theoryJul 19 2019Aug 20 2019We study the evolution of the holographic entanglement entropy (HEE) and the holographic complexity (HC) after a thermal quench in $1+1$ dimensional boundary CFTs dual to massive BTZ black holes. The study indicates how the graviton mass $m_g$, the charge ... More
Evolutions of entanglement and complexity after a thermal quench in massive gravity theoryJul 19 2019Jul 27 2019We study the evolution of the holographic entanglement entropy (HEE) and the holographic complexity (HC) after a thermal quench in $1+1$ dimensional boundary CFTs dual to massive BTZ black holes. The study indicates how the graviton mass $m_g$, the charge ... More
Evolutions of entanglement and complexity after a thermal quench in massive gravity theoryJul 19 2019We study the evolution of the holographic entanglement entropy (HEE) and the holographic complexity (HC) after a thermal quench in $1+1$ dimensional boundary CFTs dual to massive BTZ black holes. The study indicates how the graviton mass $m_g$, the charge ... More
Holographic Entanglement Entropy Close to Quantum Phase TransitionsFeb 12 2015Apr 25 2016We investigate the holographic entanglement entropy (HEE) of a strip geometry in four dimensional Q-lattice backgrounds, which exhibit metal-insulator transitions in the dual field theory. Remarkably, we find that the HEE always displays a peak in the ... More
Fermionic phase transition induced by the effective impurity in holographyJul 11 2015Nov 22 2015We investigate the holographic fermionic phase transition induced by the effective impurity in holography, which is introduced by massless scalar fields in Einstein-Maxwell-massless scalar gravity. We obtain a phase diagram in $(\alpha, T)$ plane separating ... More
On Some Applications of Group Representation Theory to Algebraic Problems Related to the Congruence Principle for Equivariant MapsJun 08 2017Given a finite group $G$ and two unitary $G$-representations $V$ and $W$, possible restrictions on Brouwer degrees of equivariant maps between representation spheres $S(V)$ and $S(W)$ are usually expressed in a form of congruences modulo the greatest ... More
StegNet: Mega Image Steganography Capacity with Deep Convolutional NetworkJun 17 2018Traditional image steganography often leans interests towards safely embedding hidden information into cover images with payload capacity almost neglected. This paper combines recent deep convolutional neural network methods with image-into-image steganography. ... More
On spurious regressions with trending variablesJun 16 2016This paper examines three types of spurious regressions where both the dependent and independent variables contain deterministic trends, stochastic trends, or breaking trends. We show that the problem of spurious regression disappears if the trend functions ... More
The Stückelberg Holographic Superconductors in Constant External Magnetic FieldJun 02 2010Jul 08 2010We investigate the St\"{u}ckelberg holographic superconductor in present of the constant external magnetic field. We observe that a critical value of magnetic field exists as the cases in usual holographic superconductor. Furthermore, we find that the ... More
Holographic fermions in charged Gauss-Bonnet black holeMar 21 2011Aug 01 2011We study the properties of the Green's functions of the fermions in charged Gauss-Bonnet black hole. What we want to do is to investigate how the presence of Gauss-Bonnet coupling constant $\alpha$ affects the dispersion relation, which is a characteristic ... More
Some properties of the holographic fermions in an extremal charged dilatonic black holeAug 31 2011We study the properties of the Green's functions of the fermions in the extremal charged dilatonic black hole proposed by Gubser and Rocha [Phys. Rev. D \textbf{81}, 046001 (2010)]. We find that many properties seem to be in agreement with that of Fermi ... More
The effect of clusterings on the equilibrium states of local majority-rule: Occurrence probability and robustnessJan 02 2012The equilibrium states associated with the local majority-rule are divided into three classes, the states of system-wide coordination, the trapped states, and the states of period-2. The effect of clustering coefficient on the occurrence probability of ... More
Characterizing the process of reaching consensus for social systemsJun 28 2011A novel way of characterizing the process of reaching consensus for a social system is given. The foundation of the characterization is based on the theorem which states that the sufficient and necessary condition for a system to reach the state of consensus ... More
Multiple Periodic Solutions for $Γ$-symmetric Newtonian SystemsDec 23 2016The existence of periodic solutions in $\Gamma$-symmetric Newtonian systems $\ddot{x}=-\nabla f(x)$ can be effectively studied by means of the $(\Gamma\times O(2))$-equivariant gradient degree with values in the Euler ring $U(\Gamma\times O(2))$. In this ... More
Strongly Liftable Schemes and the Kawamata-Viehweg Vanishing in Positive Characteristic IIIJan 05 2013Aug 01 2013A smooth scheme X over a field k of positive characteristic is said to be strongly liftable over W_2(k), if X and all prime divisors on X can be lifted simultaneously over W_2(k). In this paper, we first deduce the Kummer covering trick over W_2(k), which ... More
Anomaly freedom of the vector modes with holonomy corrections in perturbative Euclidean loop quantum gravitySep 13 2012Feb 10 2013We study the perturbation of the effective Hamiltonian constraint with holonomy correction from Euclidean loop quantum gravity. The Poisson bracket between the corrected Hamiltonian constraint and the diffeomorphism constraint is derived for vector modes. ... More
Thermal non-Gaussianity in Near-Milne universeAug 17 2009Jan 31 2010The thermal non-Gaussianity in Near-Milne universe is investigated in this letter. Through classifying thermal fluctuations into two types, one characterized by a phase transition and the other without phase transition, we show that for fluctuations undergoing ... More
A note on entropic force and brane cosmologyJan 29 2010Feb 05 2010Recently Verlinde proposed that gravity is an entropic force caused by information changes when a material body moves away from the holographic screen. In this note we apply this argument to brane cosmology, and show that the cosmological equation can ... More
The cosmological perturbation theory in loop cosmology with holonomy correctionsJan 08 2010May 21 2010In this paper we investigate the scalar mode of first-order metric perturbations over spatially flat FRW spacetime when the holonomy correction is taken into account in the semi-classical framework of loop quantum cosmology. By means of the Hamiltonian ... More
Thermal non-Gaussianity in holographic cosmologySep 19 2008Nov 03 2008Recently it has been shown that the thermal holographic fluctuations can give rise to an almost scale invariant spectrum of metric perturbations since in this scenario the energy is proportional to the area of the boundary rather than the volume. Here ... More
Dynamics of tachyon field in spatially curved FRW universeMar 09 2010Mar 16 2010The dynamics of a tachyon field plus a barotropic fluid is investigated in spatially curved FRW universe. We perform a phase-plane analysis and obtain scaling solutions accompanying with a discussion on their stability. Furthermore, we construct the form ... More
An Entropy-based Pruning Method for CNN CompressionJun 19 2017This paper aims to simultaneously accelerate and compress off-the-shelf CNN models via filter pruning strategy. The importance of each filter is evaluated by the proposed entropy-based method first. Then several unimportant filters are discarded to get ... More
The LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) in the Southern Galactic Cap I. The Spectroscopic Redshift CatalogOct 11 2017We present a spectroscopic redshift catalog from the LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) in the Southern Galactic Cap (SGC), which is designed to observe all sources (Galactic and extra-galactic) by using repeating observations ... More
Quiver Matrix Mechanics for IIB String Theory (I): Wrapping Membranes and Emergent DimensionDec 02 2003Dec 30 2003In this paper we present a discrete, non-perturbative formulation for type IIB string theory. Being a supersymmetric quiver matrix mechanics model in the framework of M(atrix) theory, it is a generalization of our previous proposal of compactification ... More
HPILN: A feature learning framework for cross-modality person re-identificationJun 07 2019Most video surveillance systems use both RGB and infrared cameras, making it a vital technique to re-identify a person cross the RGB and infrared modalities. This task can be challenging due to both the cross-modality variations caused by heterogeneous ... More
Calogero-Sutherland model in interacting fermion picture and explicit construction of Jack statesOct 31 2011Nov 04 2011The 40-year-old Calogero-Sutherland (CS) model remains a source of inspirations for understanding 1d interacting fermions. At $\beta=1, \text{or}0$, the CS model describes a free non-relativistic fermion, or boson theory, while for generic $\beta$, the ... More
HPILN: A feature learning framework for cross-modality person re-identificationJun 07 2019Aug 14 2019Most video surveillance systems use both RGB and infrared cameras, making it a vital technique to re-identify a person cross the RGB and infrared modalities. This task can be challenging due to both the cross-modality variations caused by heterogeneous ... More
AutoPruner: An End-to-End Trainable Filter Pruning Method for Efficient Deep Model InferenceMay 23 2018Jan 17 2019Channel pruning is an important family of methods to speed up deep model's inference. Previous filter pruning algorithms regard channel pruning and model fine-tuning as two independent steps. This paper argues that combining them into a single end-to-end ... More
On the permanental nullity and matching number of graphsMar 10 2016For a graph $G$ with $n$ vertices, let $\nu(G)$ and $A(G)$ denote the matching number and adjacency matrix of $G$, respectively. The permanental polynomial of $G$ is defined as $\pi(G,x)={\rm per}(Ix-A(G))$. The permanental nullity of $G$, denoted by ... More
Discretization-free Knowledge Gradient Methods for Bayesian OptimizationJul 20 2017Jul 26 2017This paper studies Bayesian ranking and selection (R&S) problems with correlated prior beliefs and continuous domains, i.e. Bayesian optimization (BO). Knowledge gradient methods [Frazier et al., 2008, 2009] have been widely studied for discrete R&S problems, ... More
Network-Wide Distributed Carrier Frequency Offsets Estimation and CompensationJul 10 2016In this paper, we propose a fully distributed algorithm for frequency offsets estimation in decentralized systems. With the proposed algorithm, each node estimates its frequency offsets by local computations and limited exchange of information with its ... More
Distributed Clock Skew and Offset Estimation in Wireless Sensor Networks: Asynchronous Algorithm and Convergence AnalysisJul 10 2016In this paper, we propose a fully distributed algorithm for joint clock skew and offset estimation in wireless sensor networks based on belief propagation. In the proposed algorithm, each node can estimate its clock skew and offset in a completely distributed ... More
A Macdonald refined topological vertexJan 30 2017Jun 01 2017We consider the refined topological vertex of Iqbal et al, as a function of two parameters (x, y), and deform it by introducing Macdonald parameters (q, t), as in the work of Vuletic on plane partitions, to obtain 'a Macdonald refined topological vertex'. ... More
The Parallel Knowledge Gradient Method for Batch Bayesian OptimizationJun 14 2016Apr 22 2018In many applications of black-box optimization, one can evaluate multiple points simultaneously, e.g. when evaluating the performances of several different neural network architectures in a parallel computing environment. In this paper, we develop a novel ... More
Learning Effective Binary Visual Representations with Deep NetworksMar 08 2018Although traditionally binary visual representations are mainly designed to reduce computational and storage costs in the image retrieval research, this paper argues that binary visual representations can be applied to large scale recognition and detection ... More
Note on the butterfly effect in holographic superconductor modelsOct 23 2016In this note we remark that the butterfly effect can be used to diagnose the phase transition of superconductivity in a holographic framework. Specifically, we compute the butterfly velocity in a charged black hole background as well as anisotropic backgrounds ... More
Dynamic gap from holographic fermions in charged dilaton black branesJan 12 2012May 01 2012We report a dynamical formation of a (Mott) gap from holographic fermions. By coupling a fermion field with dipole action to the charged dilaton black branes with a Lifshitz like IR geometry and $AdS_{4}$ boundary, we find that when the dipole interaction ... More
Holographic incoherent transport in Einstein-Maxwell-Dilaton GravityDec 04 2015Dec 15 2015Recent progress in holographic approach makes it more transparent that each conductivity can be decomposed into the coherent contribution due to momentum relaxation and the incoherent contribution due to intrinsic current relaxation. In this paper we ... More
Holographic fermions in charged dilaton black branesMar 03 2012Feb 10 2013By imposing the relativistic boundary term and Lorentz violating that in the dilatonic black brane with a Lifshitz like IR geometry and $AdS_4$ boundary, we study the properties of the spectral functions of the fermions. We find that in the two fixed ... More
Holographic Butterfly Effect at Quantum Critical PointsOct 09 2016When the Lyapunov exponent $\lambda_L$ in a quantum chaotic system saturates the bound $\lambda_L\leqslant 2\pi k_BT$, it is proposed that this system has a holographic dual described by a gravity theory. In particular, the butterfly effect as a prominent ... More
A simple holographic model for spontaneous breaking of translational symmetryAug 09 2018Oct 19 2018It has been shown that holographic massive gravities can effectively realize the states with spontaneous breaking of translational symmetry in a homogenous manner. In this work, we consider a toy model of such category by adding a special gauge-axion ... More
Holography of electrically and magnetically charged black branesJul 20 2018Aug 07 2018We construct a new class of black brane solutions in Einstein-Maxwell-dilaton (EMD) theory, which is characterized by two parameters $a,b$. Based on the obtained solutions, we make detailed analysis on the ground state in zero temperature limit and find ... More
Holographic superconductors from the massive gravityApr 21 2014Sep 24 2014A holographic superconductor is constructed in the background of a massive gravity theory. In the normal state without condensation, the conductivity exhibits a Drude peak that approaches a delta function in the massless gravity limit as studied by David ... More
Fluctuations in Gene Regulatory Networks as Gaussian Colored NoiseOct 23 2009Dec 22 2009The study of fluctuations in gene regulatory networks is extended to the case of Gaussian colored noise. Firstly, the solution of the corresponding Langevin equation with colored noise is expressed in terms of an Ito integral. Then, two important lemmas ... More
Learning Segmentation Masks with the Independence PriorNov 12 2018Nov 13 2018An instance with a bad mask might make a composite image that uses it look fake. This encourages us to learn segmentation by generating realistic composite images. To achieve this, we propose a novel framework that exploits a new proposed prior called ... More
Lifting to cluster-tilting objects in higher cluster categoriesOct 19 2008Dec 29 2008In this note, we consider the $d$-cluster-tilted algebras, the endomorphism algebras of $d$-cluster-tilting objects in $d$-cluster categories. We show that a tilting module over such an algebra lifts to a $d$-cluster-tilting object in this $d$-cluster ... More
On Hawking's Local Rigidity Theorems for Charged Black HolesMar 27 2009We show the existence of a Hawking vector field in a full neighborhood of a local, regular, bifurcate, non-expanding horizon embedded in a smooth Einstein-Maxwell space-time without assuming the underlying space-time is analytic. It extends one result ... More
Phase space and quark mass effects in neutrino emissions in a color superconductorMay 09 2006Jun 30 2006We study the phase space for neutrino emissions with massive quarks in direct Urca processes in normal and color superconducting quark matter. We derive in QCD and the NJL model the Fermi momentum reduction resulting from Fermi liquid properties which ... More
Optimal coupling patterns in interconnected communication networksJul 13 2017Dec 10 2017Traffic dynamics on single or isolated complex networks has been extensively studied in the past decade. Recently, several coupled network models have been developed to describe the interactions between real-world networked systems. In a system of interconnected ... More
Nonconvex Approach for Sparse and Low-Rank Constrained Models with Dual MomentumJun 06 2019In this manuscript, we research on the behaviors of surrogates for the rank function on different image processing problems and their optimization algorithms. We first propose a novel nonconvex rank surrogate on the general rank minimization problem and ... More
Dynamical formation of black holes due to the condensation of matter fieldMay 30 2011The purpose of the paper is to understand a mechanism of evolutionary formation of trapped surfaces when there is an electromagnetic field coupled to the background space-time. Based on the short pulse ansatz, on a given finite outgoing null hypersurface ... More
Energy Estimates and Gravitational CollapseMay 13 2011We study the cancelations in the energy estimates for Einstein vacuum equations in order to prove the formation of black holes along evolutions. The novelty of the paper is that, we completely avoid using rotation vector fields to establish the global ... More
ThiNet: A Filter Level Pruning Method for Deep Neural Network CompressionJul 20 2017We propose an efficient and unified framework, namely ThiNet, to simultaneously accelerate and compress CNN models in both training and inference stages. We focus on the filter level pruning, i.e., the whole filter would be discarded if it is less important. ... More
The Effects of Research Level and Article Type on the Differences between Citation Metrics and F1000 RecommendationsJan 06 2015Mar 11 2015F1000 recommendations have been validated as a potential data source for research evaluation, but reasons for differences between F1000 Article Factor (FFa scores) and citations remain to be explored. By linking 28254 publications in F1000 to citations ... More
Equitable vertex arboricity of graphsNov 18 2012An equitable $(t,k,d)$-tree-coloring of a graph $G$ is a coloring to vertices of $G$ such that the sizes of any two color classes differ by at most one and the subgraph induced by each color class is a forest of maximum degree at most $k$ and diameter ... More
k-forested choosability of graphs with bounded maximum average degreeFeb 19 2011A proper vertex coloring of a simple graph is $k$-forested if the graph induced by the vertices of any two color classes is a forest with maximum degree less than $k$. A graph is $k$-forested $q$-choosable if for a given list of $q$ colors associated ... More
One-Loop Renormalization of Non-Abelian Gauge Theory and βFunction Based on Loop Regularization MethodJan 15 2008Jan 24 2008All one-loop renormalization constants for Non-Abelian gauge theory are computed in details by using the symmetry-preserving Loop Regularization method proposed in\cite{LR1,LR2}. The resulting renormalization constants are manifestly shown to satisfy ... More
A universal exponential factor in the dimensional crossover from graphene to graphiteAug 01 2010Aug 30 2011A universal exponential factor, $\gamma_{c}=\pi/2$, is disclosed for the dimensional crossover of few-layer graphene (FLG) from two-dimensional graphene to three-dimensional graphite. $\gamma_{c}$ is found by analyzing available experimental data on different ... More
SafeZone: A Hierarchical Inter-Domain Authenticated Source Address Validation SolutionMar 19 2011Next generation Internet is highly concerned about the issue of reliability. Principally, the foundation of reliability is authentication of the source IP address. With the signature-and-verification based defense mechanisms available today, unfortunately, ... More
Chandra observation of Abell 1689: New determination of mass distribution and comparison to lensing measurementsApr 30 2002We present a new estimate of the projected X-ray mass of Abell 1689 observed with Chandra, in an attempt to clarify the issue of whether or not there exists a discrepancy between X-ray and gravitational lensing mass estimates claimed in previous investigations ... More
Rigidity of Infinite Hexagonal Triangulation of the PlaneJun 16 2013In the paper, we consider the rigidity problem of the infinite hexagonal triangulation of the plane under the piecewise linear conformal changes introduced by Luo in [5]. Our result shows that if a geometric hexagonal triangulation of the plane is PL ... More
Stochastic simulation of collisions using high-order weak convergence algorithmsNov 14 2018Electron collisions, described by stochastic differential equations (SDEs), were simulated using a second-order weak convergence algorithm. Using stochastic analysis, we constructed an SDE for energetic electrons in Lorentz plasma to incorporate the collisions ... More
How do Chinese cities grow? A distribution dynamics approachOct 25 2016This paper examines the dynamic behavior of city size using a distribution dynamics approach with Chinese city data for the period 1984-2010. Instead of convergence, divergence or paralleled growth, multimodality and persistence are the dominant characteristics ... More
Unified spectral hamiltonian results of balanced bipartite graphs and complementary graphsSep 10 2018A graph $G$ is said to be Hamiltonian (resp., traceable) if it has a cycle (resp., path) that contains every vertex of $G$. A bipartite graph $G=[U,V]$ is balanced if $|U|=|V|$. There have been researches on the relationship between graph eigenvalues ... More
Occluded Face Recognition Using Low-rank Regression with Generalized Gradient DirectionJun 06 2019In this paper, a very effective method to solve the contiguous face occlusion recognition problem is proposed. It utilizes the robust image gradient direction features together with a variety of mapping functions and adopts a hierarchical sparse and low-rank ... More
Active Learning for Regression Using Greedy SamplingAug 08 2018Regression problems are pervasive in real-world applications. Generally a substantial amount of labeled samples are needed to build a regression model with good generalization ability. However, many times it is relatively easy to collect a large number ... More