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Results for "Xia Chen"

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Moderate deviations and laws of the iterated logarithm for the local times of additive Lévy processes and additive random walksJul 30 2007We study the upper tail behaviors of the local times of the additive L\'{e}vy processes and additive random walks. The limit forms we establish are the moderate deviations and the laws of the iterated logarithm for the L_2-norms of the local times and ... More
Moderate deviations and law of the iterated logarithm for intersections of the ranges of random walksAug 30 2005Let S_1(n),...,S_p(n) be independent symmetric random walks in Z^d. We establish moderate deviations and law of the iterated logarithm for the intersection of the ranges #{S_1[0,n]\cap... \cap S_p[0,n]} in the case d=2, p\ge 2 and the case d=3, p=2.
Large deviations and laws of the iterated logarithm for the local times of additive stable processesMar 07 2006Jul 25 2007We study the upper tail behaviors of the local times of the additive stable processes. Let $X_1(t),...,X_p(t)$ be independent, d-dimensional symmetric stable processes with stable index $0<\alpha\le 2$ and consider the additive stable process $\bar{X}(t_1,...,t_p)=X_1(t_1)+... ... More
A Nonparametric Normality Test for High-dimensional DataApr 10 2019Many statistical methodologies for high-dimensional data assume the population normality. Although a few multivariate normality tests have been proposed, they either suffer from low power or have serious size distortion when the dimension is high. In ... More
Annealed asymptotics for Brownian motion of renormalized potential in mobile random mediumMay 05 2014Motivated by the study of the directed polymer model with mobile Poissonian traps or catalysts and the stochastic parabolic Anderson model with time dependent potential, we investigate the asymptotic behavior of \[\mathbb{E}\otimes\mathbb{E}_0\exp\left\{\pm\theta\int^t_0\bar{V}(s,B_s)ds\right\}\qquad ... More
A Nonparametric Normality Test for High-dimensional DataApr 10 2019May 08 2019Many statistical methodologies for high-dimensional data assume the population normality. Although a few multivariate normality tests have been proposed, to the best of our knowledge, none of them can properly control the type I error when the dimension ... More
Large deviations and renormalization for Riesz potentials of stable intersection measuresOct 18 2009We study the object formally defined as \gamma\big([0,t]^{2}\big)=\int\int_{[0,t]^{2}} | X_{s}- X_{r}|^{-\sigma} dr ds-E\int\int_{[0,t]^{2}} | X_{s}- X_{r}|^{-\sigma} dr ds, where $X_{t}$ is the symmetric stable processes of index $0<\beta\le 2$ in $R^{d}$. ... More
Extremely high energy cosmic ray as the probe of new physicsMar 24 2011Jun 15 2011We explore the influence of new physics on extremely high energy cosmic ray (EXCER) particles. In particular, we devote our mind to one example of new physics, unparticle stuff, on one specific process that EXECRs participate in, photopion production ... More
Unparticle effects on cosmic ray photon and $e^\pm$Jul 13 2009Sep 14 2009We study the effects of unparticle physics on the cosmic ray photon and $e^\pm$, including on the pair production (PP) and elastic scattering (ES) of cosmic ray photon off various background radiations, and on the inverse Compton scattering of cosmic ... More
Antimagic orientations of disconnected even regular graphsOct 25 2018A $labeling$ of a digraph $D$ with $m$ arcs is a bijection from the set of arcs of $D$ to $\{1,2,\ldots,m\}$. A labeling of $D$ is $antimagic$ if no two vertices in $D$ have the same vertex-sum, where the vertex-sum of a vertex $u \in V(D)$ for a labeling ... More
Standing sausage modes in coronal loops with plasma flowJun 18 2014Magnetohydrodynamic waves are important for diagnosing the physical parameters of coronal plasmas. Field-aligned flows appear frequently in coronal loops.We examine the effects of transverse density and plasma flow structuring on standing sausage modes ... More
Period ratios for standing kink and sausage modes in magnetized structures with siphon flow on the SunJan 08 2016Standing oscillations with multiple periods were found in a number of atmospheric structures on the Sun. The ratio of the period of the fundamental to twice the one of its first overtone, $P_1/2P_2$, is important in applications of solar magneto-seismology. ... More
Periods and damping rates of fast sausage oscillations in multi-shelled coronal loopsJul 08 2015Standing sausage modes are important in interpreting quasi-periodic pulsations in the lightcurves of solar flares. Their periods and damping times play an important role in seismologically diagnosing key parameters like the magnetic field strength in ... More
Probe CP violation in $H\to γZ$ through forward-backward asymmetryMay 03 2017Nov 29 2017We suggest that the forward-backward asymmetry $(A_{FB})$ of the charged leptons in $gg\to H\to\gamma Z\to\gamma \ell^-\ell^+$ process could be used to probe the CP violating $H\gamma Z$ coupling when the interference from $gg\to\gamma Z\to\gamma \ell^-\ell^+$ ... More
A New Hybrid Half-Duplex/Full-Duplex Relaying System with Antenna DiversityFeb 21 2018The hybrid half-duplex/full-duplex (HD/FD) relaying scheme is an effective paradigm to overcome the negative effects of the self-interference incurred by the full-duplex (FD) mode. However, traditional hybrid HD/FD scheme does not consider the diversity ... More
A Benchmark Dataset and Saliency-guided Stacked Autoencoders for Video-based Salient Object DetectionNov 01 2016May 09 2017Image-based salient object detection (SOD) has been extensively studied in the past decades. However, video-based SOD is much less explored since there lack large-scale video datasets within which salient objects are unambiguously defined and annotated. ... More
Simulations of Prominence Formation in the Magnetized Solar Corona by Chromospheric HeatingFeb 28 2012Starting from a realistically sheared magnetic arcade connecting chromospheric, transition region to coronal plasma, we simulate the in-situ formation and sustained growth of a quiescent prominence in the solar corona. Contrary to previous works, our ... More
Stein's method, Palm theory and Poisson process approximationOct 06 2004The framework of Stein's method for Poisson process approximation is presented from the point of view of Palm theory, which is used to construct Stein identities and define local dependence. A general result (Theorem \refimportantproposition) in Poisson ... More
Interpretation of $D_{sJ}(2632)^+$, $D_{s1}(2700)^\pm$, $D^\star_{sJ}(2860)^+$ and $D_{sJ}(3040)^+$Aug 24 2009Aug 26 2009$D_s$ mesons are investigated in a semi-classic flux tube model where the spin-orbit interaction is taken into account. Spectrum of D-wave $D_s$ is predicted. The predicted spectrum is much lower than most previous predictions. Analysis of some $D_s$ ... More
Gallai-Ramsey numbers of cyclesSep 01 2018A Gallai coloring of a complete graph is an edge-coloring such that no triangle has all its edges colored differently. A Gallai $k$-coloring is a Gallai coloring that uses $k$ colors. Given a graph $H$ and an integer $k\geq 1$, the Gallai-Ramsey number ... More
Hierarchical Comprehensive Triangular DecompositionJun 03 2014The concept of comprehensive triangular decomposition (CTD) was first introduced by Chen et al. in their CASC'2007 paper and could be viewed as an analogue of comprehensive Grobner systems for parametric polynomial systems. The first complete algorithm ... More
Cooling effect in emissions of 103mRh excited by bremsstrahlungDec 11 2008Apr 29 2009Nonlinear characteristic emissions of K alpha, K beta and gamma with a significant triplet splitting at room temperature are observed from the long-lived nuclear state of 103mRh excited by bremsstrahlung irradiation. A pronounced phase-transition-like ... More
Moderate deviations for the range of planar random walksJan 31 2006Given a symmetric random walk in $Z^2$ with finite second moments, let $R_n$ be the range of the random walk up to time $n$. We study moderate deviations for $R_n -E R_n$ and $E R_n -R_n$. We also derive the corresponding laws of the iterated logarithm. ... More
Moderate deviations and laws of the iterated logarithm for the renormalized self-intersection local times of planar random walksJun 20 2005Let B_n be the number of self-intersections of a symmetric random walk with finite second moments in the integer planar lattice. We obtain moderate deviation estimates for B_n - E B_n and E B_n- B_n, which are given in terms of the best constant of a ... More
Locally Repairable Codes with Multiple $(r_{i}, δ_{i})$-LocalitiesFeb 19 2017May 02 2017In distributed storage systems, locally repairable codes (LRCs) are introduced to realize low disk I/O and repair cost. In order to tolerate multiple node failures, the LRCs with \emph{$(r, \delta)$-locality} are further proposed. Since hot data is not ... More
$J^P$ Assignments of $Λ_c^+$ BaryonsJun 22 2009Jun 23 2010The "good" diquark is employed to study $\Lambda_c^{+}$ baryons within a mass loaded flux tube model. The study indicates that all $\Lambda_c^{+}$ baryons candidates in the 2008 review by the Particle Data Group (PDG) are well described in the mass loaded ... More
Planar anti-Ramsey numbers of matchingsMar 13 2018Given a positive integer $n$ and a planar graph $H$, let $\mathcal{T}_n(H)$ be the family of all plane triangulations $T$ on $n$ vertices such that $T$ contains a subgraph isomorphic to $H$. The planar anti-Ramsey number of $H$, denoted $ar_{_\mathcal{P}}(n, ... More
An infinite family of cubic nonnormal Cayley graphs on nonabelian simple groupsDec 06 2016Jun 10 2018We construct a connected cubic nonnormal Cayley graph on $\mathrm{A}_{2^m-1}$ for each integer $m\geqslant4$ and determine its full automorphism group. This is the first infinite family of connected cubic nonnormal Cayley graphs on nonabelian simple groups. ... More
Shortcuts to adiabatic passage for fast generation of three-atom singlet state by transitionless quantum drivingApr 12 2016Apr 18 2016Motivated by transitionless quantum driving, we construct shortcuts to adiabatic passage in a three-atom system to create a singlet state with the help of quantum zeno dynamics and non-resonant lasers. The influence of various decoherence processes is ... More
Spatial damping of propagating sausage waves in coronal cylindersJul 28 2015Sausage modes are important in coronal seismology. Spatially damped propagating sausage waves were recently observed in the solar atmosphere. We examine how wave leakage influences the spatial damping of sausage waves propagating along coronal structures ... More
Skeleton decomposition and law of large numbers for supercritical superprocessesSep 04 2017The goal of this paper has two-folds. First, we establish skeleton and spine decompositions for superprocesses whose underlying processes are general symmetric Hunt processes. Second, we use these decompositions to obtain weak and strong law of large ... More
Experimental and numerical analysis of tribological behavior of CrAl(Si)N films during ScratchNov 12 2015Nov 16 2015Scratch sliding tests with a ZrO2 ball and CrAlSiN films with different Si content were conducted due to CrAlSiN films having high hardness and good wear resistance. After up to 6000 cycles the specimens were analyzed by Scanning Electron Microscopy. ... More
Inferring flare loop parameters with measurements of standing sausage modesDec 11 2015Standing fast sausage modes in flare loops were suggested to account for a considerable number of quasi-periodic pulsations (QPPs) in the light curves of solar flares. This study continues our investigation into the possibility to invert the measured ... More
Spatial asymptotics for the parabolic Anderson models with generalized time-space Gaussian noiseMar 30 2016Partially motivated by the recent papers of Conus, Joseph and Khoshnevisan [Ann. Probab. 41 (2013) 2225-2260] and Conus et al. [Probab. Theory Related Fields 156 (2013) 483-533], this work is concerned with the precise spatial asymptotic behavior for ... 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
Transitionless-based shortcuts for the fast and robust generation of W statesMay 17 2015Jul 09 2016We propose a scheme to generate W states based on transitionles-based shortcuts technique in cavity quantum electrodynamics (QED) system. In light of quantum Zeno dynamics, we first effectively design a system whose effective Hamiltonian is equivalent ... More
Estimates for eigenvalues of a system of of elliptic equations and of the biharmonic operatorMay 17 2010Sep 08 2010Let $\om $ be a bounded domain in an $n$-dimensional Euclidean space $\Bbb R^n$. We study eigenvalues of an eigenvalue problem of a system of elliptic equations: $$ \{\aligned &\Delta {\mathbf u}+ \alpha{\rm grad}(\text{div}{\mathbf u})=-\sigma {\mathbf ... More
An optimal scheme for top quark mass measurement near $t\bar{t}$ threshold at future $e^{+}e^{-}$ collidersSep 03 2017A simulation of top quark mass measurement scheme near the $t\bar{t}$ production threshold in future $e^{+}e^{-}$ colliders, e.g. the Circular Electron Positron Collider(CEPC), is performed. $\chi^2$ fitting method is adopted to determine the number of ... More
Exponential asymptotics and law of the iterated logarithm for intersection local times of random walksMar 25 2005Let \alpha ([0,1]^p) denote the intersection local time of p independent d-dimensional Brownian motions running up to the time 1. Under the conditions p(d-2)<d and d\ge 2, we prove lim_{t\to\infty}t^{-1}\log P\bigl{\alpha([0,1]^p)\ge t^{(d(p-1))/2}\bigr}=-\gamma_{\alpha}(d,p) ... More
Signatures of transition region explosive events in hydrogen Ly-beta profilesJun 13 2010We search for signatures of transition region explosive events (EEs) in hydrogen Ly-beta profiles. Two rasters made by the SUMER (Solar Ultraviolet Measurements of Emitted Radiation) instrument on board SOHO in a quiet-Sun region and an equatorial coronal ... More
Mid-to-Far Infrared Spectral Energy Distribution of Galaxies in Spitzer First Look Survey FieldFeb 05 2007We made model fitting to the mid-to-far infrared spectral energy distributions (SEDs) for different categories of galaxies in the main extragalactic field of the {\it Spitzer} First Look Survey with the aid of spectroscopic information from the Sloan ... More
Temporal asymptotics for fractional parabolic Anderson modelApr 12 2016In this paper, we consider fractional parabolic equation of the form $ \frac{\partial u}{\partial t}=-(-\Delta)^{\frac{\alpha}{2}}u+u\dot W(t,x)$, where $-(-\Delta)^{\frac{\alpha}{2}}$ with $\alpha\in(0,2]$ is a fractional Laplacian and $\dot W$ is a ... More
Optimal Caching Placement for D2D Assisted Wireless Caching NetworksOct 27 2015Nov 03 2015In this paper, we devise the optimal caching placement to maximize the offloading probability for a two-tier wireless caching system, where the helpers and a part of users have caching ability. The offloading comes from the local caching, D2D sharing ... More
Two constructions of asymptotically optimal codebooks via the trace functionsMay 06 2019In this paper, we present two new constructions of complex codebooks with multiplicative characters, additive characters and trace functions over finite fields, and determine the maximal cross-correlation amplitude of these codebooks. We prove that the ... More
Inspecting and Interacting with Meaningful Music Representations using VAEApr 18 2019Variational Autoencoders(VAEs) have already achieved great results on image generation and recently made promising progress on music generation. However, the generation process is still quite difficult to control in the sense that the learned latent representations ... More
Observation and Simulation of Longitudinal Oscillations of an Active Region ProminenceApr 17 2012Filament longitudinal oscillations have been observed on the solar disk in H$\alpha$. We intend to find an example of the longitudinal oscillations of a prominence, where the magnetic dip can be seen directly, and examine what is the restoring force of ... More
Measurement-induced nonlocality in the anisotropic Heisenberg chainOct 29 2013Quantum correlations are essential for quantum information processing. Measurement-induced nonlocality (MIN) which is defined based on the projective measurement is a good measure of quantum correlation, and is favored for its potential applications. ... More
The 2-log-convexity of the Apery NumbersDec 04 2009Sep 12 2010We present an approach to proving the 2-log-convexity of sequences satisfying three-term recurrence relations. We show that the Apery numbers, the Cohen-Rhin numbers, the Motzkin numbers, the Fine numbers, the Franel numbers of order 3 and 4 and the large ... More
iCare: A Mobile Health Monitoring System for the ElderlyNov 13 2010This paper describes a mobile health monitoring system called iCare for the elderly. We use wireless body sensors and smart phones to monitor the wellbeing of the elderly. It can offer remote monitoring for the elderly anytime anywhere and provide tailored ... More
Multi-View 3D Object Detection Network for Autonomous DrivingNov 23 2016Jun 22 2017This paper aims at high-accuracy 3D object detection in autonomous driving scenario. We propose Multi-View 3D networks (MV3D), a sensory-fusion framework that takes both LIDAR point cloud and RGB images as input and predicts oriented 3D bounding boxes. ... More
Constructions of Optimal Cyclic $(r,δ)$ Locally Repairable CodesSep 05 2016A code is said to be a $r$-local locally repairable code (LRC) if each of its coordinates can be repaired by accessing at most $r$ other coordinates. When some of the $r$ coordinates are also erased, the $r$-local LRC can not accomplish the local repair, ... More
Spatial asymptotics for the parabolic Anderson model driven by a Gaussian rough noiseJul 14 2016The aim of this paper is to establish the almost sure asymptotic behavior as the space variable becomes large, for the solution to the one spatial dimensional stochastic heat equation driven by a Gaussian noise which is white in time and which has the ... More
2-Log-concavity of the Boros-Moll PolynomialsOct 03 2010The Boros-Moll polynomials $P_m(a)$ arise in the evaluation of a quartic integral. It has been conjectured by Boros and Moll that these polynomials are infinitely log-concave. In this paper, we show that $P_m(a)$ is 2-log-concave for any $m\geq 2$. Let ... More
Artificial Interference Aided Physical Layer Security in Cache-enabled Heterogeneous NetworksNov 11 2017Caching popular contents is a promising way to offload the mobile data traffic in wireless networks, but so far the potential advantage of caching in improving physical layer security (PLS) is rarely considered. In this paper, we contribute to the design ... More
Delay Outage Probability of Multi-relay Selection for Mobile Relay Edge Computing SystemsFeb 15 2019In this paper, we deal with the problem of relay selection in mobile edge computing networks, where a source node transmits a computation-intensive task to a destination via the aid of multiple relay nodes. It differs from the traditional relay nodes ... More
Simplified Multiuser Detection for SCMA with Sum-Product AlgorithmAug 04 2015Sparse code multiple access (SCMA) is a novel non-orthogonal multiple access technique, which fully exploits the shaping gain of multi-dimensional codewords. However, the lack of simplified multiuser detection algorithm prevents further implementation ... More
Law of large numbers for branching symmetric Hunt processes with measure-valued branching ratesFeb 28 2015Jan 24 2016We establish weak and strong law of large numbers for a class of branching symmetric Hunt processes with the branching rate being a smooth measure with respect to the underlying Hunt process, and the branching mechanism being general and state-dependent. ... More
Strong law of large numbers for supercritical superprocesses under second moment conditionFeb 05 2015Feb 09 2015Suppose that $X=\{X_t, t\ge 0\}$ is a supercritical superprocess on a locally compact separable metric space $(E, m)$. Suppose that the spatial motion of $X$ is a Hunt process satisfying certain conditions and that the branching mechanism is of the form ... More
The Ratio Monotonicity of the Boros-Moll PolynomialsJun 26 2008Mar 24 2009In their study of a quartic integral, Boros and Moll discovered a special class of Jacobi polynomials, which we call the Boros-Moll polynomials. Kauers and Paule proved the conjecture of Moll that these polynomials are log-concave. In this paper, we show ... More
Observations on spectral deformations of 103mRh excited by bremsstrahlungJul 08 2008Apr 29 2009Spectral deformation of K alpha, K beta and gamma emissions from the nuclear state 103mRh excited by bremsstrahlung are investigated. Nonlinear increase for excitation number density of 103mRh with radiation exposure is observed. The spectral profiles ... More
The inherent fluctuations of the pulsed atom laser in F=2 manifold of 87Rb atomsFeb 06 2008Oct 29 2008We have observed the intensity fluctuations of the F=2 87Rb atom laser at low output coupling rate. Theoretically, we find that the atom loss of the condensate due to the output of atom laser leads to fluctuations of the laser pulses, which is inherent ... More
Proof of a Conjecture of Hirschhorn and Sellers on OverpartitionsJul 16 2013Let $\bar{p}(n)$ denote the number of overpartitions of $n$. It was conjectured by Hirschhorn and Sellers that $\bar{p}(40n+35)\equiv 0\ ({\rm mod\} 40)$ for $n\geq 0$. Employing 2-dissection formulas of quotients of theta functions due to Ramanujan, ... More
R-CA: A Routing-based Dynamic Channel Assignment Algorithm for Wireless Mesh NetworksNov 13 2010Even though channel assignment has been studied for years, the performance of most IEEE 802.11-based multi-hop wireless networks such as wireless sensor network (WSN), wireless mesh network (WMN), mobile ad hoc network (MANET) is limited by channel interference. ... More
The Effect of Explicit Structure Encoding of Deep Neural Networks for Symbolic Music GenerationNov 20 2018Jan 24 2019With recent breakthroughs in artificial neural networks, deep generative models have become one of the leading techniques for computational creativity. Despite very promising progress on image and short sequence generation, symbolic music generation remains ... More
Prediction-Tracking-SegmentationApr 05 2019We introduce a prediction driven method for visual tracking and segmentation in videos. Instead of solely relying on matching with appearance cues for tracking, we build a predictive model which guides finding more accurate tracking regions efficiently. ... More
Large deviations for local times and intersection local times of fractional Brownian motions and Riemann-Liouville processesOct 02 2009May 27 2010In this paper we prove exact forms of large deviations for local times and intersection local times of fractional Brownian motions and Riemann-Liouville processes. We also show that a fractional Brownian motion and the related Riemann-Liouville process ... More
When ICN Meets C-RAN for HetNets: An SDN ApproachOct 22 2015In this paper, we contribute to novelly proposing and elaborating the integration of the ICN, C-RAN and SDN for the HetNet to achieve win-win situation. The vision of the proposed system is demonstrated, followed by the advantages and challenges. We further ... More
$L\log L$ criterion for a class of multitype superdiffusions with non-local branching mechanismsAug 28 2017In this paper, we provide a pathwise spine decomposition for multitype superdiffusions with non-local branching mechanisms under a martingale change of measure. As an application of this decomposition, we obtain a necessary and sufficient condition (called ... More
A Localization Method for the Internet of ThingsDec 30 2011Many 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
An Auto-tuning Framework for Autonomous VehiclesAug 14 2018Many autonomous driving motion planners generate trajectories by optimizing a reward/cost functional. Designing and tuning a high-performance reward/cost functional for Level-4 autonomous driving vehicles with exposure to different driving conditions ... More
l1-norm Penalized Orthogonal Forward RegressionSep 04 2015A l1-norm penalized orthogonal forward regression (l1-POFR) algorithm is proposed based on the concept of leaveone- out mean square error (LOOMSE). Firstly, a new l1-norm penalized cost function is defined in the constructed orthogonal space, and each ... More
Thermoelectric properties of $β$-As, Sb and Bi monolayersJan 31 2017Feb 09 2017Monolayer semiconductors of group-VA elements (As, Sb, Bi) with graphenelike buckled structure offer a potential to achieve nanoscale electronic, optoelectronic and thermoelectric devices. Motivated by recently-fabricated Sb monolayer, we systematically ... More
Distributed Solver for Discrete-Time Lyapunov Equations Over Dynamic Networks with Linear Convergence RateApr 30 2019This paper investigates the problem of solving discrete-time Lyapunov equations (DTLE) over a multi-agent system, where every agent has access to its local information and communicates with its neighbors. To obtain a solution to DTLE, a distributed algorithm ... More
Avalanches of rearrangements in quasi-2D emulsion hopper flowMar 25 2015We experimentally study the flow of a quasi-two-dimensional emulsion through a constricting hopper shape. Our area fractions range from 0.83 to 0.99, such that the droplets are always in contact with one another and are in many cases highly deformed. ... More
Damping of slow surface sausage modes in photospheric waveguidesOct 04 2018There has been considerable interest in sausage modes in photospheric waveguides like pores and sunspots, and slow surface sausage modes (SSSMs) have been suggested to damp ufficiently rapidly to account for chromospheric heating. Working in the framework ... More
Sufficient conditions for graphs to be $k$-connected, maximally connected and super-connectedAug 17 2017Let $G$ be a connected graph with minimum degree $\delta(G)$ and vertex-connectivity $\kappa(G)$. The graph $G$ is $k$-connected if $\kappa(G)\geq k$, maximally connected if $\kappa(G) = \delta(G)$, and super-connected (or super-$\kappa$) if every minimum ... More
Distributed Feature Screening via Componentwise DebiasingMar 09 2019Feature screening is a powerful tool in the analysis of high dimensional data. When the sample size $N$ and the number of features $p$ are both large, the implementation of classic screening methods can be numerically challenging. In this paper, we propose ... 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
Zoom Better to See Clearer: Human and Object Parsing with Hierarchical Auto-Zoom NetNov 21 2015Mar 28 2016Parsing articulated objects, e.g. humans and animals, into semantic parts (e.g. body, head and arms, etc.) from natural images is a challenging and fundamental problem for computer vision. A big difficulty is the large variability of scale and location ... More
Fictitious GAN: Training GANs with Historical ModelsMar 23 2018Jul 11 2018Generative adversarial networks (GANs) are powerful tools for learning generative models. In practice, the training may suffer from lack of convergence. GANs are commonly viewed as a two-player zero-sum game between two neural networks. Here, we leverage ... More
Analysis on Cache-enabled Wireless Heterogeneous NetworksAug 12 2015Caching the popular multimedia content is a promising way to unleash the ultimate potential of wireless networks. In this paper, we contribute to proposing and analyzing the cache-based content delivery in a three-tier heterogeneous network (HetNet), ... More
Resonant sequential scattering in two-frequency-pumping superradiance from a Bose-Einstein condensateJul 03 2008We study sequential scattering in superradiance from a Bose-Einstein condensate pumped by a two-frequency laser beam. We find that the distribution of atomic side modes presents highly different patterns for various frequency difference between the two ... More
Enhanced Piezoelectric Response in Hybrid Lead Halide Perovskite Thin Films via Interfacing with Ferroelectric PbZr$_{0.2}$Ti$_{0.8}$O$_3$Jan 31 2017We report a more than 10-fold enhancement of the piezoelectric coefficient $d_{33}$ of polycrystalline CH$_3$NH$_3$PbI$_3$ (MAPbI$_3$) films when interfacing them with ferroelectric PbZr$_{0.2}$Ti$_{0.8}$O$_3$ (PZT). Piezo-response force microscopy (PFM) ... More
Effects of field-aligned flows on standing kink and sausage modes supported by coronal loopsSep 13 2013Sep 22 2013Fundamental standing modes and their overtones play an important role in coronal seismology. We examine how a significant field-aligned flow affects standing modes supported by coronal loops, modeled here as cold magnetic slabs. Of particular interest ... More
Domain Specific Code Smells in Smart ContractsMay 04 2019Smart contracts are programs running on a blockchain. They are immutable to patch for bugs once deployed -- it is critical to ensure they are bug-free and well-designed before deploying. Code smells are symptoms in source code that possibly indicate deeper ... More
Polarizabilities and tune-out wavelengths of the hyperfine ground states of $^{87,85}$RbOct 26 2016The static and dynamic polarizabilities, and the tune-out wavelengths of the ground state of Rb and the hyperfine ground states of $^{87, 85}$Rb have been calculated by using relativistic configuration interaction plus core polarization(RCICP) approach. ... More
Performance Analysis of the Matrix Pair Beamformer with Matrix MismatchSep 29 2010Jun 04 2011Matrix pair beamformer (MPB) is a blind beamformer. It exploits the temporal structure of the signal of interest (SOI) and applies generalized eigen-decomposition to a covariance matrix pair. Unlike other blind algorithms, it only uses the second order ... More
Mid-Infrared Spectroscopic Properties of Ultra-Luminous Infrared QuasarsJul 23 2008We analyse mid-infrared (MIR) spectroscopic properties for 19 ultra-luminous infrared quasars (IR QSOs) in the local universe based on the spectra from the Infrared Spectrograph on board the Spitzer Space Telescope. The MIR properties of IR QSOs are compared ... More
The virial equation of state for unitary fermion thermodynamics with non-Gaussian correlationsDec 03 2007Dec 15 2008We study the roles of the dynamical high order perturbation and statistically non-linear infrared fluctuation/correlation in the virial equation of state for the Fermi gas in the unitary limit. Incorporating the quantum level crossing rearrangement effects, ... More
Cache-enabled Uplink Transmission in Wireless Small Cell NetworksDec 12 2016It is starting to become a big trend in the era of social networking that people produce and upload user-generated contents to Internet via wireless networks, bringing a significant burden on wireless uplink networks. In this paper, we contribute to designing ... More
Opportunistic Channel Sharing in Stochastic Networks with Dynamic TrafficNov 17 2016In this paper, we consider the stochastic network with dynamic traffic. The spatial distribution of access points (APs) and users are first modeled as mutually independent Poisson point processes (PPPs). Different from most previous literatures which ... More
Formation of Solar Filaments by Steady and Nonsteady Chromospheric HeatingJun 01 2011It has been established that cold plasma condensations can form in a magnetic loop subject to localized heating of the footpoints. In this paper, we use grid-adaptive numerical simulations of the radiative hydrodynamic equations to parametrically investigate ... More
On Isomorphisms of Vertex-transitive GraphsFeb 24 2016Mar 27 2016The isomorphism problem of Cayley graphs has been well studied in the literature, such as characterizations of CI (DCI)-graphs and CI (DCI)-groups. In this paper, we generalize these to vertex-transitive graphs and establish parallel results. Some interesting ... More
Standing Sausage Modes In Nonuniform Magnetic Tubes: An Inversion Scheme For Inferring Flare Loop ParametersSep 04 2015Standing sausage modes in flare loops are important for interpreting quasi-periodic pulsations (QPPs) in solar flare lightcurves. We propose an inversion scheme that consistently uses their periods $P$ and damping times $\tau$ to diagnose flare loop parameters. ... More
A Low-Latency List Successive-Cancellation Decoding Implementation for Polar CodesJun 29 2018Due to their provably capacity-achieving performance, polar codes have attracted a lot of research interest recently. For a good error-correcting performance, list successive-cancellation decoding (LSCD) with large list size is used to decode polar codes. ... More
Jet/accretion and Unification for FSRQs/FRII and BL Lac objects/FRI radio galaxiesApr 22 2015We compiled a sample of 24 flat-spectrum radio quasars (FSRQs), 21 BL Lacs, 13 FRI and 12 FRII radio galaxies to study the jet power and broad-line luminosity relation, and the jet power and black hole mass relation. Furthermore, we obtain the histograms ... More
Quantum state transfer in spin chains via shortcuts to adiabaticityJan 10 2018Based on shortcuts to adiabaticity and quantum Zeno dynamics, we present a protocol to implement quantum state transfer (QST) in a quantum spin-1/2 chain. In the protocol, the complex Hamiltonian of an $N$-site system is simplified, and a simple effective ... More
Dual Supervised LearningJul 03 2017Many supervised learning tasks are emerged in dual forms, e.g., English-to-French translation vs. French-to-English translation, speech recognition vs. text to speech, and image classification vs. image generation. Two dual tasks have intrinsic connections ... More
Spatial Brownian motion in renormalized Poisson potential: A critical caseMar 29 2011Let $B_s$ be a three dimensional Brownian motion and $\omega(dx)$ be an independent Poisson field on $\mathbb{R}^3$. It is proved that for any $t>0$, conditionally on $\omega(\cdot)$, \label{*} \mathbb{E}_0 \exp\{\theta \int_0^t \bar{V}(B_s) ds\} \ < ... More
Large Band Gap Quantum Anomalous Hall Phase in Hexagonal Organometallic FrameworksNov 23 2018The nontrivial band gap plays a critical role in quantum anomalous Hall (QAH) insulators. In this work, we propose that the intrinsic QAH phase with sizable band gaps up to 367 meV is achieved in two-dimensional hexagonal organometallic frameworks (HOMFs). ... More