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Testing the 130 GeV gamma-ray line with high energy resolution detectorsJun 11 2012Jul 31 2012Recently some hints of the existence of $\gamma$-ray line around 130 GeV are reported according to the analysis of Fermi-LAT data. If confirmed it would be the first direct evidence to show the existence of new physics beyond the standard model. Here ... More

Neutrino and anti-neutrino transport in accretion disksFeb 09 2012We numerically solve the one dimensional Boltzmann equation of the neutrino and anti-neutrino transport in accretion disks and obtain the fully energy dependent and direction dependent neutrino and anti-neutrino emitting spectra, under condition that ... More

Ruelle Operator Theorem for Nonexpansive systemsMar 04 2009The Ruelle operator theorem has been studied extensively both in dynamical systems and iterated function systems. In this paper we study the Ruelle operator theorem for nonexpansive systems. Our theorems give some sufficient conditions for the Ruelle ... More

Vertical Structure of Neutrino Dominated Accretion Disks and Neutrino Transport in the disksSep 06 2012We investigate the vertical structure of neutrino dominated accretion disks by self-consistently considering the detailed microphysics, such as the neutrino transport, vertical hydrostatic equilibrium, the conservation of lepton number, as well as the ... More

Constraints on black hole spins with a general relativistic accretion disk corona modelJan 22 2014Nov 19 2015The peaks of the spectra of the accretion disks surrounding massive black holes in quasars are in the far-UV or soft X-ray band, which are usually not observed. However, in the disk corona model, the soft photons from the disk are Comptonized to high ... More

Is the metallicity of the progenitor of long gamma-ray bursts really low?May 22 2013May 24 2013Observations of long gamma-ray bursts (LGRBs) offer a unique opportunity for probing the cosmic star formation history, although whether or not LGRB rates are biased tracers of star formation rate history is highly debated. Based on an extensive sample ... More

Proper Scaling of the Anomalous Hall EffectMar 31 2009Working with epitaxial films of Fe, we succeeded in independent control of different scattering processes in the anomalous Hall effect. The result appropriately accounted for the role of phonons, thereby clearly exposing the fundamental flaws of the standard ... More

A Full Bayesian Approach to Sparse Network Inference using Heterogeneous DatasetsJan 04 2019Network inference has been attracting increasing attention in several fields, notably systems biology, control engineering and biomedicine. To develop a therapy, it is essential to understand the connectivity of biochemical units and the internal working ... More

High Precision Variational Bayesian Inference of Sparse Linear NetworksJan 03 2019Sparse networks can be found in a wide range of applications, such as biological and communication networks. Inference of such networks from data has been receiving considerable attention lately, mainly driven by the need to understand and control internal ... More

Reversing cooling flows with AGN jets: shock waves, rarefaction waves, and trailing outflowsMay 31 2017Oct 03 2017The cooling flow problem is one of the central problems in galaxy clusters, and active galactic nucleus (AGN) feedback is considered to play a key role in offsetting cooling. However, how AGN jets heat and suppress cooling flows remains highly debated. ... More

Scattering Equations and Matrices: From Einstein To Yang-Mills, DBI and NLSMDec 10 2014Jan 25 2015The tree-level S-matrix of Einstein's theory is known to have a representation as an integral over the moduli space of punctured spheres localized to the solutions of the scattering equations. In this paper we introduce three operations that can be applied ... More

Scattering of Massless Particles: Scalars, Gluons and GravitonsSep 04 2013In a recent note we presented a compact formula for the complete tree-level S-matrix of pure Yang-Mills and gravity theories in arbitrary spacetime dimension. In this paper we show that a natural formulation also exists for a massless colored cubic scalar ... More

New Double Soft Emission TheoremsMar 16 2015We study the behavior of the tree-level S-matrix of a variety of theories as two particles become soft. By analogy with the recently found subleading soft theorems for gravitons and gluons, we explore subleading terms in double soft emissions. We first ... More

Energy Efficiency of Distributed Antenna Systems with Wireless Power TransferOct 10 2018In this paper, we study energy-efficient resource allocation in distributed antenna system (DAS) with wireless power transfer, where time-division multiple access (TDMA) is adopted for downlink multiuser information transmission. In particular, when a ... More

On the Powerball MethodMar 24 2016Jun 06 2016We propose a new method to accelerate the convergence of optimization algorithms. This method simply adds a power coefficient $\gamma\in[0,1)$ to the gradient during optimization. We call this the Powerball method after the well-known Heavy-ball method ... More

A charging method for electric vehicle using multi battery series modeMay 17 2017A charging method for electric vehicle using multi battery series mode which consisted of the following steps was introduced: the battery series is firstly charged at a constant power with a charging current of I1. When the terminal voltage over the battery ... More

One-Loop Corrections from Higher Dimensional Tree AmplitudesDec 15 2015Jan 21 2016We show how one-loop corrections to scattering amplitudes of scalars and gauge bosons can be obtained from tree amplitudes in one higher dimension. Starting with a complete tree-level scattering amplitude of n+2 particles in five dimensions, one assumes ... More

Scattering of Massless Particles in Arbitrary DimensionJul 08 2013Jul 10 2013We present a compact formula for the complete tree-level S-matrix of pure Yang-Mills and gravity theories in arbitrary spacetime dimension. The new formula for the scattering of n particles is given by an integral over the position of n points on a sphere ... More

Scattering Equations and KLT OrthogonalityJun 27 2013Several recent developments point to the fact that rational maps from n-punctured spheres to the null cone of D dimensional momentum space provide a natural language for describing the scattering of massless particles in D dimensions. In this note we ... More

A Sparse Bayesian Approach to the Identification of Nonlinear State-Space SystemsAug 15 2014Apr 23 2015This technical note considers the identification of nonlinear discrete-time systems with additive process noise but without measurement noise. In particular, we propose a method and its associated algorithm to identify the system nonlinear functional ... More

Perturbation techniques for convergence analysis of proximal gradient method and other first-order algorithms via variational analysisOct 23 2018We develop new perturbation techniques for conducting convergence analysis of various first-order algorithms for a class of nonsmooth optimization problems. We consider the iteration scheme of an algorithm to construct a perturbed stationary point set-valued ... More

The short-time behavior of kinetic spherical model with long-ranged interactionsNov 12 1999The kinetic spherical model with long-ranged interactions and an arbitrary initial order m_{0} quenched from a very high temperature to T < T_{c} is solved. In the short-time regime, the bulk order increases with a power law in both the critical and phase-ordering ... More

Negative feedback effects on star formation history and cosmic reionizationDec 22 2008After considering the effects of negative feedback on the process of star formation, we explore the relationship between star formation process and the associated feedback, by investigating how the mechanical feedback from supernovae(SNe) and radiative ... More

A Novel GAN-based Fault Diagnosis Approach for Imbalanced Industrial Time SeriesApr 01 2019This paper proposes a novel fault diagnosis approach based on generative adversarial networks (GAN) for imbalanced industrial time series where normal samples are much larger than failure cases. We combine a well-designed feature extractor with GAN to ... More

Factorization of Chiral String AmplitudesMar 08 2016Mar 09 2016We re-examine a closed-string model defined by altering the boundary conditions for one handedness of two-dimensional propagators in otherwise-standard string theory. We evaluate the amplitudes using Kawai-Lewellen-Tye factorization into open-string amplitudes. ... More

Testing Lorentz Invariance with Ultra High Energy Cosmic Ray SpectrumNov 30 2008May 04 2009The GZK cutoff predicted at the Ultra High Energy Cosmic Ray (UHECR) spectrum as been observed by the HiRes and Auger experiments. The results put severe constraints on the effect of Lorentz Invariance Violation(LIV) which has been introduced to explain ... More

Images of the radiatively inefficient accretion flow surrounding a Kerr black hole: application in Sgr A*Apr 27 2009In fully general relativity, we calculate the images of the radiatively inefficient accretion flow (RIAF) surrounding a Kerr black hole with arbitrary spins, inclination angles, and observational wavelengths. For the same initial conditions, such as the ... More

Wasserstein Distance based Deep Adversarial Transfer Learning for Intelligent Fault DiagnosisMar 02 2019The demand of artificial intelligent adoption for condition-based maintenance strategy is astonishingly increased over the past few years. Intelligent fault diagnosis is one critical topic of maintenance solution for mechanical systems. Deep learning ... More

A Technical Survey on Statistical Modelling and Design Methods for Crowdsourcing Quality ControlDec 05 2018Online crowdsourcing provides a scalable and inexpensive means to collect knowledge (e.g. labels) about various types of data items (e.g. text, audio, video). However, it is also known to result in large variance in the quality of recorded responses which ... More

Effects of anisotropic thermal conduction on wind properties in hot accretion flowMar 24 2016Previous works have clearly shown the existence of winds from black hole hot accretion flow and investigated their detailed properties. In extremely low accretion rate systems, the collisional mean-free path of electrons is large compared with the length-scale ... More

Blob ejection from advection-dominated accretion flow: observational consequencesAug 07 2000Aug 08 2000There is increasing evidence for the presence of an optically thin advection-dominated accretion flow (ADAF) in low luminosity active galactic nuclei and radio-loud quasars. The present paper is devoted to explore the fate of a blob ejected from an ADAF, ... More

Magneto-thermal Disk Wind from Protoplanetary DisksNov 20 2015Global evolution and dispersal of protoplanetary disks (PPDs) is governed by disk angular momentum transport and mass-loss processes. Recent numerical studies suggest that angular momentum transport in the inner region of PPDs is largely driven by magnetized ... More

Generative Hybrid Representations for Activity Forecasting with No-Regret LearningApr 12 2019Automatically reasoning about future human behaviors is a difficult problem with significant practical applications to assistive systems. Part of this difficulty stems from learning systems' inability to represent all kinds of behaviors. Some behaviors, ... More

Systems Aliasing in Dynamic Network Reconstruction: Issues on Low Sampling FrequenciesMay 27 2016Oct 29 2018Network reconstruction of dynamical continuous-time (CT) systems is motivated by applications in many fields. Due to experimental limitations, especially in biology, data could be sampled at low frequencies, leading to significant challenges in network ... More

The 2017 Hands in the Million Challenge on 3D Hand Pose EstimationJul 07 2017We present the 2017 Hands in the Million Challenge, a public competition designed for the evaluation of the task of 3D hand pose estimation. The goal of this challenge is to assess how far is the state of the art in terms of solving the problem of 3D ... More

Cosmic reionization of hydrogen and helium: contribution from both mini-quasars and starsMay 15 2015Observations on the high-redshift galaxies at $z>6$ imply that their ionizing emissivity is unable to fully reionize the Universe at $z\sim 6$. Either a high escape fraction of ionizing photons from these galaxies or a large population of faint galaxies ... More

Statistical ranking and combinatorial Hodge theoryNov 07 2008Aug 10 2009We propose a number of techniques for obtaining a global ranking from data that may be incomplete and imbalanced -- characteristics almost universal to modern datasets coming from e-commerce and internet applications. We are primarily interested in score ... More

Ruelle Operator for Infinite Conformal IFSApr 07 2009Let $(X, \{w_j \}_{j=1}^m, \{p_j \}_{j=1}^m)$ ($2 \leq m < \infty$) be a contractive iterated function system (IFS), where $X$ is a compact subset of ${\Bbb{R}}^d$. It is well known that there exists a unique nonempty compact set $K$ such that $K=\bigcup_{j=1}^m ... More

Global Network Prediction from Local Node DynamicsSep 02 2018The study of dynamical systems on networks, describing complex interactive processes, provides insight into how network structure affects global behaviour. Yet many methods for network dynamics fail to cope with large or partially-known networks, a ubiquitous ... More

CMU LiveMedQA at TREC 2017 LiveQA: A Consumer Health Question Answering SystemNov 15 2017In this paper, we present LiveMedQA, a question answering system that is optimized for consumer health question. On top of the general QA system pipeline, we introduce several new features that aim to exploit domain-specific knowledge and entity structures ... More

Emergent Spectra From Disks Surrounding Kerr Black Holes: Effect of Photon Trapping and Disk Self-ShadowingOct 19 2009May 01 2010Based on a new estimation of their thickness, the global properties of relativistic slim accretion disks are investigated in this work. The resulting emergent spectra are calculated using the relativistic ray-tracing method, in which we neglect the self-irradiation ... More

Bregman distances and Klee setsFeb 16 2008In 1960, Klee showed that a subset of a Euclidean space must be a singleton provided that each point in the space has a unique farthest point in the set. This classical result has received much attention; in fact, the Hilbert space version is a famous ... More

Bregman distances and Chebyshev setsDec 24 2007A closed set of a Euclidean space is said to be Chebyshev if every point in the space has one and only one closest point in the set. Although the situation is not settled in infinite-dimensional Hilbert spaces, in 1932 Bunt showed that in Euclidean spaces ... More

Study of tracking efficiency and its systematic uncertainty from $J/ψ \to p \overline{p} π^+ π^-$ at BESIIIJul 13 2015Oct 22 2015Based on $J/\psi$ events collected with the BESIII detector, with corresponding Monte Carlo samples, the tracking efficiency and its systematic uncertainty are studied using a control sample of $J/\psi \to p \overline p \pi^+ \pi^-$. Validation methods ... More

Population Density-based Hospital Recommendation with Mobile LBS Big DataAug 02 2017The difficulty of getting medical treatment is one of major livelihood issues in China. Since patients lack prior knowledge about the spatial distribution and the capacity of hospitals, some hospitals have abnormally high or sporadic population densities. ... More

Learning from Large-scale Noisy Web Data with Ubiquitous Reweighting for Image ClassificationNov 02 2018Many advances of deep learning techniques originate from the efforts of addressing the image classification task on large-scale datasets. However, the construction of such clean datasets is costly and time-consuming since the Internet is overwhelmed by ... More

Identifying Biochemical Reaction Networks From Heterogeneous DatasetsSep 17 2015Sep 18 2015In this paper, we propose a new method to identify biochemical reaction networks (i.e. both reactions and kinetic parameters) from heterogeneous datasets. Such datasets can contain (a) data from several replicates of an experiment performed on a biological ... More

Constraints and Implications on Higgs FCNC Couplings from Precision Measurement of $B_s \to μ^+μ^-$ DecayMar 18 2017Jun 09 2017We study constraints and implications of the recent LHCb measurement of ${\cal B}(B_s \to \mu^+\mu^-)$ for tree-level Higgs-mediated flavor-changing neutral current (FCNC) interactions. Combined with experimental data on $B_s$ mass difference $\Delta ... More

A general relativistic external Compton-scattering model for TeV emission from M87Dec 13 2011M87 is the first detected non-blazar extragalactic Tera-Electron-Volt (TeV) source with rapid variation and very flat spectrum in the TeV band. To explain the two-peaks in the spectral energy distribution (SED) of the nucleus of M87 which is similar to ... More

A detailed study of the high-mass clump interacting with the bubble N10Mar 20 2013We performed a detailed study of the high-mass clump interacting with bubble N10 based on the spectral lines $^{12}CO(3-2)$, $HCO^+(4-3)$, $N_2H^+(4-3)$ and $CH_3OH(7(0,7)-6(0,6))$ and continuum emission data at 450 $\mu$m and 850 $\mu$m released on CADC ... More

α'-Expansion of Open String Disk Integrals via Mellin TransformationsFeb 05 2014Open string disk integrals are represented as contour integrals of a product of Beta functions by using Mellin transformations. This makes the mathematical problem of computing the \alpha' expansion around the field theory limit basically identical to ... More

Understanding Convolution for Semantic SegmentationFeb 27 2017Jun 01 2018Recent advances in deep learning, especially deep convolutional neural networks (CNNs), have led to significant improvement over previous semantic segmentation systems. Here we show how to improve pixel-wise semantic segmentation by manipulating convolution-related ... More

BigHand2.2M Benchmark: Hand Pose Dataset and State of the Art AnalysisApr 09 2017Dec 09 2017In this paper we introduce a large-scale hand pose dataset, collected using a novel capture method. Existing datasets are either generated synthetically or captured using depth sensors: synthetic datasets exhibit a certain level of appearance difference ... More

Online Bearing Remaining Useful Life Prediction Based on a Novel Degradation Indicator and Convolutional Neural NetworksDec 08 2018In industrial applications, nearly half the failures of motors are caused by the degradation of rolling element bearings (REBs). Therefore, accurately estimating the remaining useful life (RUL) for REBs are of crucial importance to ensure the reliability ... More

Optical Selection Rule based on Valley-Exciton Locking for 2D ValleytronicsApr 20 2015Optical selection rule fundamentally determines the optical transition between energy states in a variety of physical systems from hydrogen atoms to bulk crystals such as GaAs. It is important for optoelectronic applications such as lasers, energy-dispersive ... More

Monolayer Excitonic LaserMar 18 2015Recently, two-dimensional (2D) materials have opened a new paradigm for fundamental physics explorations and device applications. Unlike gapless graphene, monolayer transition metal dichalcogenide (TMDC) has new optical functionalities for next generation ... More

Review Networks for Caption GenerationMay 25 2016Oct 27 2016We propose a novel extension of the encoder-decoder framework, called a review network. The review network is generic and can enhance any existing encoder- decoder model: in this paper, we consider RNN decoders with both CNN and RNN encoders. The review ... More

High cumulants of conserved charges and their statistical uncertaintiesSep 07 2017We study the influence of measured high cumulants of conserved charges on their associated statistical uncertainties in relativistic heavy-ion collisions. With a given number of events, the measured cumulants randomly fluctuate with an approximately normal ... More

UG$^{2+}$ Track 2: A Collective Benchmark Effort for Evaluating and Advancing Image Understanding in Poor Visibility EnvironmentsApr 09 2019The UG$^{2+}$ challenge in IEEE CVPR 2019 aims to evoke a comprehensive discussion and exploration about how low-level vision techniques can benefit the high-level automatic visual recognition in various scenarios. In its second track, we focus on object ... More

Electron Positron Capture Rates and the Steady State Equilibrium Condition for Electron-Positron Plasma with NucleonsJul 13 2005The reaction rates of the beta processes for all particles at arbitrary degeneracy are derived, and an {\it analytic} steady state equilibrium condition $\mu_n=\mu_p+2\mu_e$ which results from the equality of electron and positron capture rates in the ... More

Distributed privacy-preserving network size computation: A system-identification based methodSep 10 2013In this study, we propose an algorithm for computing the network size of communicating agents. The algorithm is distributed: a) it does not require a leader selection; b) it only requires local exchange of information, and; c) its design can be implemented ... More

Chiral liquid crystal colloidsDec 28 2017Colloidal particles disturb the alignment of rod-like molecules of liquid crystals, giving rise to long-range interactions that minimize the free energy of distorted regions. Particle shape and topology are known to guide this self-assembly process. However, ... More

Quantum Decoherence Modulated by Special RelativityMar 24 2007Oct 03 2007By investigating the evolution of a moving spin-1/2 Dirac electron coupled with a background magnetic noise, we demonstrate that the effects of special relativity will significantly modify the decoherence properties of the spin state. The dephasing could ... More

Joint Hand Detection and Rotation Estimation by Using CNNDec 08 2016Hand detection is essential for many hand related tasks, e.g. parsing hand pose, understanding gesture, which are extremely useful for robotics and human-computer interaction. However, hand detection in uncontrolled environments is challenging due to ... More

Evidence of the side jump mechanism in the anomalous Hall effect in paramagnetsApr 04 2014Persistent confusion has existed between the intrinsic (Berry curvature) and the side jump mechanisms of anomalous Hall effect (AHE) in ferromagnets. We provide unambiguous identification of the side jump mechanism, in addition to the skew scattering ... More

Video Representation Learning and Latent Concept Mining for Large-scale Multi-label Video ClassificationJul 05 2017Jul 25 2017We report on CMU Informedia Lab's system used in Google's YouTube 8 Million Video Understanding Challenge. In this multi-label video classification task, our pipeline achieved 84.675% and 84.662% GAP on our evaluation split and the official test set. ... More

A Comparative Study of Consistent Snapshot Algorithms for Main-Memory Database SystemsOct 11 2018In-memory databases (IMDBs) are gaining increasing popularity in big data applications, where clients commit updates intensively. Specifically, it is necessary for IMDBs to have efficient snapshot performance to support certain special applications (e.g., ... More

Virtual Color-Kinematics Duality: 6-pt 1-Loop MHV AmplitudesOct 05 2012Apr 30 2013We study 1-loop MHV amplitudes in N=4 super Yang-Mills theory and in N=8 supergravity. For Yang-Mills we find that the simple form for the full amplitude presented by Del Duca, Dixon and Maltoni naturally leads to one that has physical residues on all ... More

Directional visible light scattering by silicon nanoparticlesDec 13 2012Directional light scattering by spherical silicon nanoparticles in the visible spectral range is experimentally demonstrated for the first time. These unique scattering properties arise due to simultaneous excitation and mutual interference of magnetic ... More

Circular Polarizer Realized by a Single Layer of Planar Chiral Metallic NanostructureOct 10 2014As a basic optical element, circular polarizer plays significant roles in signal transmission, measurements and life science microscopy. Three-dimensional (3D) chiral structures have been thought to be necessary to realize circular polarizers. Here we ... More

Hot accretion flow with radiative cooling: state transitions in black hole X-ray binariesApr 08 2016We investigate state transitions in black hole X-ray binaries through different parameters by using two-dimensional axisymmetric hydrodynamical simulation method. For radiative cooling in hot accretion flow, we take into account the bremsstrahlung, synchrotron ... More

Event Detection and Localization in Distribution Grids with Phasor Measurement UnitsNov 15 2016The recent introduction of synchrophasor technology into power distribution systems has given impetus to various monitoring, diagnostic, and control applications, such as system identification and event detection, which are crucial for restoring service, ... More

Sub-leading correction of two-gluon rapidity correlations of strong colour fieldSep 25 2017In the framework of Color Glass Condensate (CGC) effective field theory (EFT), we calculate two-gluon rapidity correlations in the leading and sub-leading orders of $p_\perp/Q_s$. In the leading order, both short- and long-range rapidity correlations ... More

H2CO and H110α observations towards NH3 sourcesMay 13 2014May 14 2014We observed the H2CO(110-111) absorption lines and H110{\alpha} radio recombination lines (RRL) toward 180 NH3 sources using the Nanshan 25-m radio telescope. In our observation, 138 sources were found to have H2CO lines and 36 have H110{\alpha} RRLs. ... More

High-Quality BN-Graphene-BN Nanoribbon Capacitors Modulated by Graphene Side-gate ElectrodesOct 31 2014High-quality BN-Graphene-BN nanoribbon capacitors with double side-gates of graphene are experimentally realized. Graphene electronic properties can be significantly modulated by the double side-gates. The modulation effects are very obvious and followed ... More

The role of black hole spin and magnetic field threading the unstable neutrino disk in Gamma Ray BurstsNov 02 2009Nov 05 2009We report on the third phase of our study of the neutrino-cooled hyperaccreting torus around a black hole that powers the jet in Gamma Ray Bursts. We focus on the influence of the black hole spin on the properties of the torus. The structure of a stationary ... More

Investigation of a possible electronic phase separation in the magnetic semiconductors Ga$_{1-x}$Mn$_{x}$As and Ga$_{1-x}$Mn$_{x}$P by means of fluctuation spectroscopyMay 08 2017Nov 17 2017We present systematic temperature-dependent resistance noise measurements on a series of ferromagnetic Ga$_{1-x}$Mn$_{x}$As epitaxial thin films covering a large parameter space in terms of the Mn content $x$ and other variations regarding sample fabrication. ... More

One-loop Scattering Equations and Amplitudes from Forward LimitAug 25 2015We show that the forward limit of tree-level scattering equations with two massive particles yields the SL(2,C)-covariant form of the one-loop scattering equations recently proposed by Geyer et al. We clarify several properties about these equations and ... More

Interplay between localization and magnetism in (Ga,Mn)As and (In,Mn)AsSep 15 2017Ion implantation of Mn combined with pulsed laser melting is employed to obtain two representative compounds of dilute ferromagnetic semiconductors (DFSs): Ga1-xMnxAs and In1-xMnxAs. In contrast to films deposited by the widely used molecular beam epitaxy, ... More

Are Soft Theorems Renormalized?May 14 2014Jul 01 2014We show that the distributional nature of soft theorems requires the soft limit expansion to take priority over the regulator expansion of Feynman loop integrals. We start the study of soft graviton theorems at loop level from this perspective by considering ... More

Topological nanocolloids with facile electric switching of plasmonic propertiesNov 29 2016Combining topology and plasmonics paradigms in nanocolloidal systems may enable new means of pre-engineering desired composite material properties. Here we design and realize orientationally ordered assemblies of noble metal nanoparticles with genus-one ... More

Intrinsic diamagnetism in the Weyl semimetal TaAsOct 28 2015Feb 22 2016We investigate the magnetic properties of TaAs, a prototype Weyl semimetal. TaAs crystals show weak diamagnetism with magnetic susceptibility of about -7 * 10^{-7} emu/(g*Oe) at 5 K. A general feature is the appearance of a minimum at around 185 K in ... More

Evolution of Magnetism in Single-Crystal Ca2Ru1-xIrxO4 (0< x <0.65)Apr 07 2015We report structural, magnetic, transport and thermal properties of single-crystal Ca2Ru1-xIrxO4 (0 < x< 0.65). Ca2RuO4 is a structurally-driven Mott insulator with a metal-insulator transition at TMI = 357 K, which is well separated from antiferromagnetic ... More

Probing Excitonic Dark States in Single-layer Tungsten DisulfideMar 21 2014Transition metal dichalcogenide (TMDC) monolayer has recently emerged as an important two-dimensional semiconductor with promising potentials for electronic and optoelectronic devices. Unlike semi-metallic graphene, layered TMDC has a sizable band gap. ... More

Tunable band gap in germanene by surface adsorptionDec 19 2013Opening a sizable band gap in the zero-gap germanene without heavy loss of carrier mobility is a key issue for its application in nanoelectronic devices such as high-performance field effect transistors (FETs) operating at room temperature. Using the ... More

N-Point Tree-Level Scattering Amplitude in the New Berkovits' StringDec 19 2013Jan 29 2014We give a proof by direct computation that at tree level, the twistor-like superstring theory in the pure spinor formalism proposed very recently by Berkovits describes ten-dimensional N=1 super Yang-Mills in its heterotic version, and type II supergravity ... More

On Identification of Distribution GridsNov 05 2017Large-scale integration of distributed energy resources into residential distribution feeders necessitates careful control of their operation through power flow analysis. While the knowledge of the distribution system model is crucial for this type of ... More

SDSS J211852.96-073227.5: a new γ-ray flaring narrow-line Seyfert 1 galaxyJan 11 2018Jun 06 2018We report on the identification of a new {\gamma}-ray-emitting narrow-line Seyfert 1 (NLS1) galaxy, SDSS J211852.96-073227.5 (hereinafter J2118-0732). The galaxy, at a redshift of 0.26, is associated with a radio source of flat/inverted spectrum at high ... More

How to locate the QCD phase boundary by scanning observable in the phase planeMay 11 2018Nov 29 2018For small volume of the quark-gluon plasma formed in heavy ion collisions, the observable near criticality must obey finite-size scaling. According to the finite-size scaling, there exists a fixed point at the critical temperature, where scaled susceptibility ... More

Leveraging Weakly Supervised Data to Improve End-to-End Speech-to-Text TranslationNov 05 2018Feb 10 2019End-to-end Speech Translation (ST) models have many potential advantages when compared to the cascade of Automatic Speech Recognition (ASR) and text Machine Translation (MT) models, including lowered inference latency and the avoidance of error compounding. ... More

Ultrafast Synchronization via Local ObservationOct 22 2017Rapid expansions of their size and frequent changes of their topology make it difficult to observe and analyze complex networks. We explore the properties of the Hankel matrix and propose an algorithm for calculating the final synchronization state that ... More

Observation of Piezoelectricity in Monolayer Molybdenum DisulfideAug 29 2014Piezoelectricity offers precise and robust conversion between electricity and mechanical force. Here we report the first experimental evidence of piezoelectricity in a single layer of molybdenum disulfide (MoS2) crystal as a result of inversion symmetry ... More

In-Plane Anisotropies of Polarized Raman Response and Electrical Conductivity in Layered Tin SelenideJan 02 2017The group IV-VI compound SnSe, with an orthorhombic lattice structure, has recently attracted particular interest due to its unexpectedly low thermal conductivity and high power factor, showing great promise for thermoelectric applications. SnSe displays ... More

High Thermoelectric Powerfactor in Single and Few-Layer MoS$_2$May 26 2015Dec 31 2016The quest for high-efficiency heat-to-electricity conversion has been one of the major driving forces towards renewable energy production for the future. Efficient thermoelectric devices require high voltage generation from a temperature gradient and ... More

Structural and magnetic properties of CeZnAl$_3$ single crystalsApr 16 2018We have synthesized single crystals of CeZnAl$_3$, which is a new member of the family of the Ce-based intermetallics Ce$TX_3$ ($T$ = transition metal, $X$= Si, Ge, Al), crystallizing in the non-centrosymmetric tetragonal BaNiSn$_3$-type structure. Magnetization, ... More

Electronic phase separation in insulating (Ga,Mn)As with low compensation: Super-paramagnetism and hopping conductionFeb 20 2018In the present work, low compensated insulating (Ga,Mn)As with 0.7% Mn is obtained by ion implantation combined with pulsed laser melting. The sample shows variable-range hopping transport behavior with a Coulomb gap in the vicinity of the Fermi energy, ... More

Network Reconstruction from Intrinsic NoiseOct 01 2013Dec 19 2014This paper considers the problem of inferring an unknown network of dynamical systems driven by unknown, intrinsic, noise inputs. Equivalently we seek to identify direct causal dependencies among manifest variables only from observations of these variables. ... More

Stationary Harmonic Measure as the Scaling Limit of Truncated Harmonic MeasureNov 12 2018In this paper we prove that the stationary harmonic measure of an infinite set in the upper planar lattice can be represented as the proper scaling limit of the classical harmonic measure of truncations of the infinite set.

Dictionary LASSO: Guaranteed Sparse Recovery under Linear TransformationApr 30 2013Jul 20 2013We consider the following signal recovery problem: given a measurement matrix $\Phi\in \mathbb{R}^{n\times p}$ and a noisy observation vector $c\in \mathbb{R}^{n}$ constructed from $c = \Phi\theta^* + \epsilon$ where $\epsilon\in \mathbb{R}^{n}$ is the ... More

Spatial Attention Deep Net with Partial PSO for Hierarchical Hybrid Hand Pose EstimationApr 12 2016Oct 20 2016Discriminative methods often generate hand poses kinematically implausible, then generative methods are used to correct (or verify) these results in a hybrid method. Estimating 3D hand pose in a hierarchy, where the high-dimensional output space is decomposed ... More