Results for "Jing Yang"

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The Second Discriminant of a Univariate PolynomialSep 03 2016We define the second discriminant $D_2$ of a univariate polynomial $f$ of degree greater than $2$ as the product of the linear forms $2\,r_k-r_i-r_j$ for all triples of roots $r_i, r_k, r_j$ of $f$ with $i<j$ and $j\neq k, k\neq i$. $D_2$ vanishes if ... More
Infinitely many sign-changing solutions for an elliptic problem with double critical Hardy-Sobolev-Maz'ya termsMar 05 2015In this paper, we investigate the following elliptic problem involving double critical Hardy-Sobolev-Maz'ya terms: $$ \left\{\begin{array}{ll} -\Delta u = \mu\frac{|u|^{2^*(t)-2}u}{|y|^t} + \frac{|u|^{2^*(s)-2}u}{|y|^s} + a(x) u, & {\rm in}\ \Omega,\\ ... More
Unsupervised Learning of Parsimonious General-Purpose Embeddings for User and Location ModellingApr 11 2017Jan 22 2018Many social network applications depend on robust representations of spatio-temporal data. In this work, we present an embedding model based on feed-forward neural networks which transforms social media check-ins into dense feature vectors encoding geographic, ... More
Quickest Change Detection with Mismatched Post-Change ModelsJan 26 2016In this paper, we study the quickest change detection with mismatched post-change models. A change point is the time instant at which the distribution of a random process changes. The objective of quickest change detection is to minimize the detection ... More
Multiplicities of Character Values of Binary Sidel'nikov-Lempel-Cohn-Eastman SequencesFeb 20 2017Binary Sidel'nikov-Lempel-Cohn-Eastman sequences (or SLCE sequences) over F 2 have even period and almost perfect autocorrelation. However, the evaluation of the linear complexity of these sequences is really difficult. In this paper, we continue the ... More
Optimal Status Updating for an Energy Harvesting Sensor with a Noisy ChannelMar 05 2018Mar 08 2018Consider an energy harvesting sensor continuously monitors a system and sends time-stamped status update to a destination. The destination keeps track of the system status through the received updates. Under the energy causality constraint at the sensor, ... More
Systems of Reflected Stochastic PDEs in a Convex Domain: Analytical ApproachApr 23 2018Jun 13 2018In this paper, we establish an existence and uniqueness result for system of quasilinear stochastic partial differential equations (SPDEs for short) with reflection in a convex domain in R^k by analytical approach. The method is based on the approximation ... More
Neumann Boundary Problem for Parabolic Partial Differential Equations with Divergence TermsFeb 21 2018We prove an existence and uniqueness result for Neumann boundary problem of a parabolic partial differential equation (PDE for short) with a singular nonlinear divergence term which can only be understood in a weak sense. A probabilistic approach is applied ... More
Band Gap of Strained Graphene NanoribbonsDec 14 2009Jan 20 2010The band structures of strained graphene nanoribbons (GNRs) are examined by a tight binding Hamiltonian that is directly related to the type and strength of strains. Compared to the two-dimensional graphene whose band gap remains close to zero even if ... More
Positive or sign-changing solutions for a critical semilinear nonlocal equationNov 21 2015We consider the following critical semilinear nonlocal equation involving the fractional Laplacian $$ (-\Delta)^su=K(|x|)|u|^{2^*_s-2}u,\ \ \hbox{in}\ \ \mathbb{R}^N, $$ where $K(|x|)$ is a positive radial function, $N>2+2s$, $0<s<1$, and $2^*_s=\frac{2N}{N-2s}$. ... More
Age of Information Minimization for an Energy Harvesting Source with Updating Erasures: With and Without FeedbackAug 13 2018Consider an energy harvesting (EH) sensor that continuously monitors a system and sends time-stamped status update to a destination. The sensor harvests energy from nature and uses it to power its updating operations. The destination keeps track of the ... More
Identification of the newly observed $Σ_b(6097)^\pm$ baryons from their strong decaysOct 16 2018Two bottom $\Sigma_b(6097)^\pm$ baryons were observed in the final states $\Lambda_b^0\pi^-$ and $\Lambda_b^0\pi^+$ in $pp$ collision by LHCb collaboration, whose masses and widths were measured. In a $^{3}P_{0}$ model, the strong decay widths of two ... More
Strong Decays of observed $Λ_c$ Baryons in the $^3P_0$ ModelFeb 20 2019The strong decay widths and some important branching ratios of possible Okubo-Zweig-Iizuka(OZI)-allowed strong decay channels of $\Lambda_c(2595)^+$, $\Lambda_c(2625)^+$, $\Lambda_c(2765)^+$ ($\Sigma_c(2765)^+$), $\Lambda_c(2860)^+$, $\Lambda_c(2880)^+$ ... More
Solutions for a nonlocal elliptic equation involving critical growth and Hardy potentialSep 24 2015In this paper, by an approximating argument, we obtain infinitely many solutions for the following Hardy-Sobolev fractional equation with critical growth \begin{equation*}\label{0.1} \left\{% \begin{array}{ll} (-\Delta)^{s} u-\ds\frac{\mu u}{|x|^{2s}}=|u|^{2^*_s-2}u+au, ... More
On the small-$x$ behavior of the orbital angular momentum distributions in QCDFeb 08 2018Apr 06 2018We present the numerical solution of the leading order QCD evolution equation for the orbital angular momentum distributions of quarks and gluons and discuss its implications for the nucleon spin sum rule. We observe that at small-$x$, the gluon helicity ... More
Integrating UML with Service Refinement for Requirements Modeling and AnalysisMar 14 2018Unified Modeling Language (UML) is the de facto standard for requirements modeling and system design. UML as a visual language can tremendously help customers, project managers, and developers to specify the requirements of a target system. However, UML ... More
The auxiliary function method for waveform based earthquake locationJun 17 2017This paper introduces the auxiliary function method (AFM), a novel, fast and simple approach for waveform based earthquake location. From any initial hypocenter and origin time, we can construct the auxiliary function, whose zero set contains the real ... More
Back-to-back correlations of boson-antiboson pairs for anisotropic expanding sourcesJun 04 2015Sep 16 2015In the hot and dense hadronic sources formed in high energy heavy ion collisions, the particle interactions in medium might lead to a measurable back-to-back correlation (BBC) of boson-antiboson pairs. We calculate the BBC functions of $\phi\,\phi$ and ... More
Riding on the Primary: A New Spectrum Sharing Paradigm for Wireless-Powered IoT DevicesJan 20 2018In this paper, a new spectrum sharing model referred to as riding on the primary (ROP) is proposed for wireless-powered IoT devices with ambient backscatter communication capabilities. The key idea of ROP is that the secondary transmitter harvests energy ... More
Runtime Analysis for Self-adaptive Mutation RatesNov 30 2018We propose and analyze a self-adaptive version of the $(1,\lambda)$ evolutionary algorithm in which the current mutation rate is part of the individual and thus also subject to mutation. A rigorous runtime analysis on the OneMax benchmark function reveals ... More
To Skip or to Switch? Minimizing Age of Information under Link Capacity ConstraintJun 22 2018Jul 02 2018Consider a scenario where a source continuously monitors an object and sends time-stamped status updates to a destination through a rate-limited link. In order to measure the "freshness" of the status information available at the destination, we adopt ... More
Numerical Computations for Backward Doubly SDEs and SPDEsMay 30 2008Jun 05 2008In this paper we present two numerical schemes of approximating solutions of backward doubly stochastic differential equations (BDSDEs for short). We give a method to discretize a BDSDE. And we also give the proof of the convergence of these two kinds ... More
Oscillation and variation for Riesz transform associated with Bessel operatorsMay 04 2016Let $\lambda>0$ and $\triangle_\lambda:=-\frac{d^2}{dx^2}-\frac{2\lambda}{x} \frac d{dx}$ be the Bessel operator on $\mathbb R_+:=(0,\infty)$. We show that the oscillation operator $\mathcal{O}(R_{\Delta_{\lambda},\ast})$ and variation operator $\mathcal{V}_{\rho}(R_{\Delta_{\lambda},\ast})$ ... More
Local unitary equivalence of quantum states and simultaneous orthogonal equivalenceMay 01 2016The correspondence between local unitary equivalence of bipartite quantum states and simultaneous orthogonal equivalence is thoroughly investigated and strengthened. It is proved that local unitary equivalence can be studied through simultaneous similarity ... More
A New Kind of Deformed Hermite Polynomials and Its ApplicationsDec 03 2002A new kind of deformed calculus was introduced recently in studying of parabosonic coordinate representation. Based on this deformed calculus, a new deformation of Hermite polynomials is proposed, its some properties such as generating function, orthonormality, ... More
Delivery of Liquid Metal to the Target Vessels as Vascular Embolic Agent to Starve Diseased Tissues or Tumors to DeathAug 04 2014Tumor growth relies heavily on the continuous blood and nutrients supply. Theoretically, it is an ideal therapeutic way of killing tumor by only vascular embolization. However, most of the existing vascular embolic agents are still rather insufficient ... More
Optimal Status Update for Age of Information Minimization with an Energy Harvesting SourceJun 19 2017Jun 05 2018In this paper, we consider a scenario where an energy harvesting sensor continuously monitors a system and sends time-stamped status updates to a destination. The destination keeps track of the system status through the received updates. We use the metric ... More
When to Preempt? Age of Information Minimization under Link Capacity ConstraintDec 11 2018In this paper, we consider a scenario where a source continuously monitors an object and sends time-stamped status updates to a destination through a rate-limited link. We assume updates arrive randomly at the source according to a Bernoulli process. ... More
Stepwise quantum phonon pumping in plasmon-enhanced Raman scatteringJan 13 2016May 30 2017Plasmon-enhanced Raman scattering (PERS) becomes nonlinear when phonon pumping and phonon-stimulated scattering come into play. It is fundamental to the understanding of PERS and its photobleaching behavior. By quantization of the molecular vibration ... More
MIMO Beamforming Design towards Maximizing Mutual Information in Wireless Sensor NetworkDec 10 2014Nov 11 2015This paper considers joint beamformer design towards maximizing the mutual information in a coherent wireless sensor network with noisy observation and multiple antennae. Leveraging the weighted minimum mean square error and block coordinate ascent (BCA) ... More
Relation between three-qubit entanglement invariants and two-qubit concurrenceJul 20 2007In this Brief Report we show the relation between three-qubit entanglement invariants and two-qubit concurrence with the help of projective measurements. How to use these invariants to represent the entanglement property of three-qubit pure states is ... More
Berry's phase for coherent states of Landau levelsJun 14 2007The Berry phases for coherent states and squeezed coherent states of Landau levels are calculated. Coherent states of Landau levels are interpreted as a result of a magnetic flux moved adiabatically from infinity to a finite place on the plane. The Abelian ... More
Two asymptotic expansions for gamma function developed by Windschitl's formulaDec 21 2017In this paper, we develop Windschitl's approximation formula for the gamma function to two asymptotic expansions by using a little known power series. In particular, for $n\in \mathbb{N}$ with $n\geq 4$, we have \begin{equation*} \Gamma \left( x+1\right) ... More
Electrically Induced Photonic and Acoustic Quantum Effect From Liquid Metal Droplets in Aqueous SolutionMay 08 2018So far, several macroscopic quantum phenomena have been discovered in the Josephson junction. Through introducing such a structure with a liquid membrane sandwiched between two liquid metal electrodes, we had ever observed a lighting and sound phenomenon ... More
Squeezed correlations of $φ$ meson pairs for hydrodynamic sources in high-energy heavy-ion collisionsSep 02 2015In the hot and dense hadronic sources formed in high-energy heavy-ion collisions, the particle interactions in medium might lead to a squeezed back-to-back correlation (BBC) of boson-antiboson pairs. We calculate the BBC functions of $\phi\phi$ for sources ... More
Effect of in-medium mass-shift on transverse-momentum spectrum and elliptic anisotropy of $φ$ mesonMar 07 2019Mar 20 2019We study the effect of in-medium mass-shift on transverse-momentum spectrum and elliptic anisotropy of $\phi$ meson. It is found that the mass-shift enhances the $\phi$ yields and suppresses the elliptic flow $v_2$ in large momentum region, and the effects ... More
Quantum parameter estimation with the Landau-Zener transitionDec 07 2016We investigate the fundamental limits in precision allowed by quantum mechanics from Landau-Zener transitions, concerning Hamiltonian parameters. While the Landau-Zener transition probabilities depend sensitively on the system parameters, much more precision ... More
ND^(*) and NB^(*) interactions in a chiral quark modelAug 17 2015ND and ND^* interactions become a hot topic after the observation of new charmed hadrons \Sigma_c(2800) and \Lambda_c(2940)^+. In this letter, we have preliminary investigated S-wave ND and ND^* interactions with possible quantum numbers in the chiral ... More
Aharonov-Anandan phase in Lipkin-Meskov-Glick modelSep 02 2010Dec 25 2010In the system of several interacting spins, geometric phases have been researched intensively.However, the studies are mainly focused on the adiabatic case (Berry phase), so it is necessary for us to study the non-adiabatic counterpart (Aharonov and Anandan ... More
When Bifidelity Meets CoKriging: An Efficient Physics-Informed Multifidelity MethodDec 07 2018In this work, we propose a framework that combines the approximation-theory-based multifidelity method and Gaussian-process-regression-based multifidelity method to achieve data-model convergence when stochastic simulation models and sparse accurate observation ... More
The Obstacle Problem for Quasilinear Stochastic PDEs with Neumann boundary conditionApr 23 2018We prove the existence and uniqueness of solution of the obstacle problem for quasilinear stochastic partial differential equations (OSPDEs for short) with Neumann boundary condition. Our method is based on the analytical technics coming from parabolic ... More
A New Kind of Graded Lie Algebra and Parastatistical SupersymmetryDec 02 2002In this paper the usual $Z_2$ graded Lie algebra is generalized to a new form, which may be called $Z_{2,2}$ graded Lie algebra. It is shown that there exists close connections between the $Z_{2,2}$ graded Lie algebra and parastatistics, so the $Z_{2,2}$ ... More
Double Yangians of classical types and their vertex representationsOct 15 2018Oct 18 2018The Yangian double $DY(g_N)$ is introduced for the classical types of $g_N=so_{2n+1}$, $sp_{2n}$, $so_{2n}$. Via Gauss decomposition of the generator matrix, the Yangian double is given the Drinfeld presentation. In addition, bosonization of level $1$ ... More
Double shadow of a regular phantom black hole as photons couple to Weyl tensorJun 15 2016Oct 16 2016We have studied the shadow of a regular phantom black hole as photons couple to Weyl tensor. We find that the coupling yields that photons with different polarization directions propagate along different paths in the spacetime so that there exits double ... More
Weight Distribution of a Class of Cyclic Codes with Arbitrary Number of ZerosJan 11 2013Cyclic codes have been widely used in digital communication systems and consume electronics as they have efficient encoding and decoding algorithms. The weight distribution of cyclic codes has been an important topic of study for many years. It is in ... More
Oscillation and variation for semigroups associated with Bessel operatorsMay 04 2016Let $\lambda>0$ and $\triangle_\lambda:=-\frac{d^2}{dx^2}-\frac{2\lambda}{x} \frac d{dx}$ be the Bessel operator on $\mathbb R_+:=(0,\infty)$. We show that the oscillation operator ${\mathcal O(P^{[\lambda]}_\ast)}$ and variation operator ${\mathcal V}_\rho(P^{[\lambda]}_\ast)$ ... More
Spectrum of Higher excitations of $B$ and $D$ mesons in the relativistic potential modelJan 18 2015We study the masses and wave functions of heavy-light quark-antiquark system in the relativistic potential model, where we focus on the higher excited states of $B$ and $D$ mesons. The resonances of $D_J(2740)$, $D_J^*(2760)$, $D_J^*(3000)$ and $D_{sJ}^*(2860)$ ... More
Heavy-Light Mesons In A Relativistic ModelJul 30 2015May 09 2016We study the heavy-light mesons in a relativistic model, which is derived from the instantaneous Bethe-Salpeter equation by applying the Foldy-Wouthuysen transformation on the heavy quark. The kernel we choose is based on scalar confining and vector Coulomb ... More
To learn image super-resolution, use a GAN to learn how to do image degradation firstJul 30 2018This paper is on image and face super-resolution. The vast majority of prior work for this problem focus on how to increase the resolution of low-resolution images which are artificially generated by simple bilinear down-sampling (or in a few cases by ... More
Optimal Parameter Choices via Precise Black-Box AnalysisJul 09 2018Oct 17 2018It has been observed that some working principles of evolutionary algorithms, in particular, the influence of the parameters, cannot be understood from results on the asymptotic order of the runtime, but only from more precise results. In this work, we ... More
Theoretical Modeling of Tribochemical Reaction on Pt and Au Contacts: Mechanical Load and CatalysisNov 10 2015Nov 11 2015Micro-electro-mechanical system and nano-electro-mechanical system (MEMS and NEMS) transistors are considered promising for size-reducing and power-maximizing electronic devices. However, the tribopolymer which forms due to the mechanical load to the ... More
How Much of Wireless Rate Can Smartphones Support in 5G Networks?Aug 17 2018Due to the higher wireless transmission rates in the fifth generation (5G) cellular networks, higher computation overhead is incurred in smartphones, which can cause the wireless transmission rates to be limited by the computation capability of wireless ... More
Squeezed back-to-back correlations of $K^+$$K^-$ in d+Au collisions at $\sqrt{s_{NN}}=200$ GeV and Au+Au collisions at $\sqrt{s_{NN}}=62.4$ GeVSep 10 2018Feb 24 2019We investigate the squeezed back-to-back correlations (BBC) of $K^+$$K^-$, caused by the mass modification of the particle in the dense medium formed in d+Au collisions at $\sqrt{s_{NN}}=200$ GeV and Au+Au collisions at $\sqrt{s_{NN}}=62.4$ GeV. Considering ... More
Gluon fragmentation functions in the Nambu-Jona-Lasinio modelJun 14 2016Jul 19 2016We derive gluon fragmentation functions in the Nambu-Jona-Lasinio (NJL) model by treating a gluon as a pair of color lines formed by fictitious quark and anti-quark ($q\bar q$). Gluon elementary fragmentation functions are obtained from the quark and ... More
Cross-Domain Adversarial Auto-EncoderApr 17 2018In this paper, we propose the Cross-Domain Adversarial Auto-Encoder (CDAAE) to address the problem of cross-domain image inference, generation and transformation. We make the assumption that images from different domains share the same latent code space ... More
Transceiver Design for Clustered Wireless Sensor Networks --- Towards SNR MaximizationApr 21 2015Sep 18 2015This paper investigates the transceiver design problem in a noisy-sensing noisy-transmission multi-input multi-output (MIMO) wireless sensor network. Consider a cluster-based network, where multiple sensors scattering across several clusters will first ... More
Effect of in-medium mass-shift on transverse-momentum spectrum and elliptic anisotropy of $φ$ mesonMar 07 2019We study the effect of in-medium mass-shift on transverse-momentum spectrum and elliptic anisotropy of $\phi$ meson. It is found that the mass-shift improves the $\phi$ yields and suppresses the elliptic flow v2 in large momentum region, and the effect ... More
Spectrum of the charmed and b-flavored mesons in the relativistic potential modelJul 17 2013Jul 21 2014We study the bound states of heavy-light quark-antiquark system in the relativistic potential model, where the potential includes the long-distance confinement term, the short-distance Coulomb term and spin-dependent term. The spectrum of $B$, $B^*$, ... More
The monotonicity rules for the ratio of two Laplace transforms with applicationsMar 07 2018Let $f$ and $g$ be both continuous functions on $\left( 0,\infty \right) $ with $g\left( t\right) >0$ for $t\in \left( 0,\infty \right) $ and let $ F\left( x\right) =\mathcal{L}\left( f\right) $, $G\left( x\right) =\mathcal{L }\left( g\right) $ be respectively ... More
Infinitely many positive solutions for nonlinear fractional Schrödinger equationsFeb 09 2014We consider the following nonlinear fractional Schr\"{o}dinger equation $$ (-\Delta)^su+u=K(|x|)u^p,\ \ u>0 \ \ \hbox{in}\ \ R^N, $$ where $K(|x|)$ is a positive radial function, $N\ge 2$, $0<s<1$, $1<p<\frac{N+2s}{N-2s}$. Under some asymptotic assumptions ... More
An accurate approximation formula for gamma functionDec 21 2017In this paper, we present a very accurate approximation for gamma function: \begin{equation*} \Gamma \left( x+1\right) \thicksim \sqrt{2\pi x}\left( \dfrac{x}{e}\right) ^{x}\left( x\sinh \frac{1}{x}\right) ^{x/2}\exp \left( \frac{7}{324}\frac{1}{ x^{3}\left( ... More
The Obstacle Problem for Quasilinear Stochastic Integral-Partial Differential EquationsApr 22 2018We prove an existence and uniqueness result for the obstacle problem for quasilinear stochastic integral-partial differential equations. Our method is based on the probabilistic interpretation of the solution using backward doubly SDEs with jumps.
Parabose Squeezed Operator and Its ApplicationsDec 03 2002By virtue of the parabose squeezed operator, propagator of a parabose parametric amplifier, explicit form of parabose squeezed number states and normalization factors of excitation states on a parabose squeezed vacuum atate are calculated in this letter, ... More
Graded Lie Algebra Generating of Parastatistical Algebraic StructureDec 03 2002A new kind of graded Lie algebra (we call it $Z_{2,2}$ graded Lie algebra) is introduced as a framework for formulating parasupersymmetric theories. By choosing suitable bose subspace of the $Z_{2,2}$ graded Lie algebra and using relevant generalized ... More
Non-Asymptotic Achievable Rates for Gaussian Energy-Harvesting Channels: Best-Effort and Save-and-TransmitMay 08 2018Jan 14 2019An additive white Gaussian noise energy-harvesting channel with an infinite-sized battery is considered. The energy arrival process is modeled as a sequence of independent and identically distributed random variables. The channel capacity $\frac{1}{2}\log(1+P)$ ... More
Incentive Mechanisms for Motivating Mobile Data Offloading in Heterogeneous Networks: A Salary-Plus-Bonus ApproachFeb 08 2018In this paper, a salary-plus-bonus incentive mechanism is proposed to motivate WiFi Access Points (APs) to provide data offloading service for mobile network operators (MNOs). Under the proposed salary-plus-bonus scheme, WiFi APs are rewarded not only ... More
Age-Minimal Online Policies for Energy Harvesting Sensors with Random Battery RechargesFeb 05 2018We consider an energy harvesting sensor that is sending measurement updates regarding some physical phenomenon to a destination. The sensor relies on energy harvested from nature to measure and send its updates, and is equipped with a battery of finite ... More
Energy Efficiency Challenges of 5G Small Cell NetworksFeb 12 2017The deployment of a large number of small cells poses new challenges to energy efficiency, which has often been ignored in fifth generation (5G) cellular networks. While massive multiple-input multiple outputs (MIMO) will reduce the transmission power ... More
Hierarchically Learned View-Invariant Representations for Cross-View Action RecognitionSep 03 2018Recognizing human actions from varied views is challenging due to huge appearance variations in different views. The key to this problem is to learn discriminant view-invariant representations generalizing well across views. In this paper, we address ... More
Metric Learning via Maximizing the Lipschitz Margin RatioFeb 09 2018In this paper, we propose the Lipschitz margin ratio and a new metric learning framework for classification through maximizing the ratio. This framework enables the integration of both the inter-class margin and the intra-class dispersion, as well as ... More
Fine-grained ECG Classification Based on Deep CNN and Online Decision FusionJan 19 2019Early recognition of abnormal rhythm in ECG signals is crucial for monitoring or diagnosing patients' cardiac conditions and increasing the success rate of the treatment. Classifying abnormal rhythms into fine-grained categories is very challenging due ... More
Persistent spin current in mesoscopic ferrimagnetic spin ringJul 20 2005Jul 21 2005Using a semiclassical approach, we study the persistent magnetization current of a mesoscopic ferrimagnetic ring in a nonuniform magnetic field. At zero temperature, there exists persistent spin current because of the quantum fluctuation of magnons, similar ... More
Liquid Metal Angiography for Mega Contrast X-ray Visualization of Vascular NetworkNov 26 2013Visualizing the anatomical vessel networks plays a vital role in physiological or pathological investigations. However, identifying the fine structures of the smallest capillary vessels via conventional imaging ways remains a big challenge. Here, the ... More
Hybrid functional pseudopotentialsJul 12 2017The consistency between the exchange-correlation functional used in pseudopotential construction and in the actual density functional theory calculation is essential for the accurate prediction of fundamental properties of materials. However, routine ... More
FPMax: a 106GFLOPS/W at 217GFLOPS/mm2 Single-Precision FPU, and a 43.7GFLOPS/W at 74.6GFLOPS/mm2 Double-Precision FPU, in 28nm UTBB FDSOIJun 24 2016FPMax implements four FPUs optimized for latency or throughput workloads in two precisions, fabricated in 28nm UTBB FDSOI. Each unit's parameters, e.g pipeline stages, booth encoding etc., were optimized to yield 1.42ns latency at 110GLOPS/W (SP) and ... More
Age-Minimal Online Policies for Energy Harvesting Sensors with Incremental Battery RechargesFeb 06 2018Feb 22 2018A sensor node that is sending measurement updates regarding some physical phenomenon to a destination is considered. The sensor relies on energy harvested from nature to transmit its updates, and is equipped with a finite $B$-sized battery to save its ... More
The (1+$λ$) Evolutionary Algorithm with Self-Adjusting Mutation RateApr 07 2017May 25 2018We propose a new way to self-adjust the mutation rate in population-based evolutionary algorithms in discrete search spaces. Roughly speaking, it consists of creating half the offspring with a mutation rate that is twice the current mutation rate and ... More
Fully Automatic Liquid Metal Printer towards Personal Electronics ManufactureNov 22 2013Printed electronics is quickly emerging with tremendous value in a wide variety of latest electrical engineering areas. However, restricted to the rather limited conductive inks and printing strategies, the currently existing electronics manufacturing ... More
Study of $CP$ Violations in $B^-\rightarrow K^- π^+π^-$ and $B^-\rightarrow K^- f_0(500)$ decays in the QCD factorization approachMay 24 2018Within the QCD factorization approach, we study the $CP$ violations in $B^-\rightarrow K^-\pi^+\pi^-$ and $B^-\rightarrow K^- f_0(500)$ decays. We find the experimental data of the localized $CP$ asymmetry in $B^-\rightarrow K^-\pi^+\pi^-$ decays in the ... More
Analyzing $Ξ(1620)$ in the molecule picture in the Bethe-Salpeter equation approachJan 13 2019Jan 17 2019In this work, we assume that the observed state $\Xi(1620)$ is a $s$-wave $\Lambda\bar{K}$ or $\Sigma\bar{K}$ bound state. Based on this molecule picture, we establish the Bethe-Salpeter equations for $\Xi(1620)$ in the ladder and instantaneous approximations. ... More
Variable frequency photonic crystalsAug 18 2015In this paper, we have firstly proposed a new one-dimensional variable frequency photonic crystals (VFPCs), and calculated the transmissivity and the electronic field distribution of VFPCs with and without defect layer, and considered the effect of defect ... More
Strain-Induced Room-Temperature Ferromagnetic Semiconductors with Giant Anomalous Hall Effect in Two-Dimensional Cr$_2$Ge$_2$Se$_6$Jan 27 2019By density functional theory calculations, we predict a stable two-dimensional (2D) ferromagnetic semiconductor Cr$_2$Ge$_2$Se$_6$, where the Curie temperature $T$$_c$ can be dramatically enhanced beyond room temperature by applying a few percent strain. ... More
Dissipative dynamics of few-photons superposition states: A dynamical invariantOct 16 2011By numerically calculating the time-evolved Wigner functions, we investigate the dynamics of a few-photon superposed (e.g., up to two ones) state in a dissipating cavity. It is shown that, the negativity of the Wigner function of the photonic state unquestionably ... More
Multi-Level Deep Cascade Trees for Conversion Rate Prediction in Recommendation SystemMay 24 2018Nov 19 2018Developing effective and efficient recommendation methods is very challenging for modern e-commerce platforms. Generally speaking, two essential modules named "Click-Through Rate Prediction" (\textit{CTR}) and "Conversion Rate Prediction" (\textit{CVR}) ... More
Theory of Ferrimagnetism in the Hubbard Model on Bipartite Lattices with Spectrum SymmetryFeb 19 2014In this paper we developed theory of the ferrimagnetism in the Hubbard model on bipartite lattices with spectrum symmetry. We then study the defect-induced ferrimagnetic orders in three models and explored the universal features.
Performance Analysis for Massive MIMO Downlink with Low Complexity Approximate Zero-Forcing PrecodingNov 01 2017Zero-forcing (ZF) precoding plays an important role for massive MIMO downlink due to its near optimal performance. However, the high computation cost of the involved matrix inversion hinders its application. In this paper, we adopt the first order Neumann ... More
Generative Adversarial Network based Speaker Adaptation for High Fidelity WaveNet VocoderDec 06 2018Neural networks based vocoders, typically the WaveNet, have achieved spectacular performance for text-to-speech (TTS) in recent years. Although state-of-the-art parallel WaveNet has addressed the issue of real-time waveform generation, there remains problems. ... More
High order maximum principle preserving finite volume method for convection dominated problemsApr 15 2014In this paper, we investigate the application of the maximum principle preserving (MPP) parametrized flux limiters to the high order finite volume scheme with Runge-Kutta time discretization for solving convection dominated problems. Such flux limiter ... More
Optimal measurements for quantum multi-parameter estimation with general statesJun 19 2018We generalize the approach by Braunstein and Caves [Phys. Rev. Lett. 72, 3439 (1994)] to quantum multi-parameter estimation with general states. We derive a matrix bound of the classical Fisher information matrix due to each projector of a measurement. ... More
Pion transverse-momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss interferometry in a viscous granular source modelAug 17 2016Apr 26 2017We examine the evolution of quark-gluon plasma (QGP) droplets with viscous hydrodynamics and analyze the pion transverse-momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss (HBT) interferometry in a granular source model consisting of viscous QGP ... More
Dynamical instability towards finite-momentum pairing in quenched BCS superconducting phasesOct 22 2018In this work we numerically investigate the fate of the Bardeen-Cooper-Schrieffer (BCS) pairing in the presence of quenched phase under Peierls substitution using time-dependent real space and momentum space Bogoliubov-de Gennes equation methods and Anderson ... More
Massless Dirac Fermions in a Square Optical LatticeFeb 27 2009We propose a novel scheme to simulate and observe massless Dirac fermions with cold atoms in a square optical lattice. A U(1) adiabatic phase is created by two laser beams for the tunneling of atoms between neighbor lattice sites. Properly adjusting the ... More
Mass and Decay Constant of $I=1/2$ Scalar Meson In QCD Sum RuleSep 27 2004May 23 2005We calculate the mass and decay constant of $I=1/2$ scalar mesons composed of quark-antiquark pairs based on QCD sum rule. The quauk-antiquark pairs can be $s\bar{q}$ or $q\bar{s}$ ($q=u,d$) in quark model, the quantum numbers of spin and orbital angular ... More
Interleaved Training and Training-Based Transmission Design for Hybrid Massive Antenna DownlinkOct 18 2017Mar 11 2018In this paper, we study the beam-based training design jointly with the transmission design for hybrid massive antenna single-user (SU) and multiple-user (MU) systems where outage probability is adopted as the performance measure. For SU systems, we propose ... More
Energy Efficient Beamforming for Massive MIMO Public ChannelApr 18 2017Sep 22 2017For massive MIMO public channel with any sector size in either microwave or millimeter wave (mmwave) band, this paper studies the beamforming design to minimize the transmit power while guaranteeing the quality of service (QoS) for randomly deployed users. ... More
Performance Scaling Law for Multi-Cell Multi-User Massive MIMOMar 07 2017Jul 21 2017This work provides a comprehensive scaling law based performance analysis for multi-cell multi-user massive multiple-input-multiple-output (MIMO) downlink systems. Imperfect channel state information (CSI), pilot contamination, and channel spatial correlation ... More
Adaptations of ROUGE and BLEU to Better Evaluate Machine Reading Comprehension TaskJun 10 2018Current evaluation metrics to question answering based machine reading comprehension (MRC) systems generally focus on the lexical overlap between the candidate and reference answers, such as ROUGE and BLEU. However, bias may appear when these metrics ... More
Online Timely Status Updates with Erasures for Energy Harvesting SensorsNov 12 2018An energy harvesting sensor that is sending status updates to a destination through an erasure channel is considered, in which transmissions are prone to being erased with some probability $q$, independently from other transmissions. The sensor, however, ... More
Inferring the perturbation time from biological time course dataFeb 04 2016Time course data are often used to study the changes to a biological process after perturbation. Statistical methods have been developed to determine whether such a perturbation induces changes over time, e.g. comparing a perturbed and unperturbed time ... More
Controllable dynamics of two separate qubits in Bell statesMay 23 2007Oct 09 2007The dynamics of entanglement and fidelity for a subsystem of two separate spin-1/2 qubits prepared in Bell states is investigated. One of the subsystem qubit labelled $A$ is under the influence of a Heisenberg XY spin-bath, while another one labelled ... More