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Results for "Xiang Liu"

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Rapid variability of BL Lac 0925+504: interstellar scintillation induced?Apr 25 2018Analysis of rapid variability at 4.85 GHz for the BL BLac object 0925+504 is presented and discussed. The structure functions (SF) are investigated with both refractive and weak interstellar scintillation (RISS/WISS) models analytically. Parameters obtained ... More
Position angle changes of inner-jets in a sample of blazarsMay 24 2013May 02 2014We have carried out the Gaussian model-fitting to the 15 GHz VLBA cores for a sample of blazars from the MOJAVE database, analyzed the correlations in the model-fitted parameters and studied the variability properties for different group of sources. We ... More
Is the newly reported $X(5568)$ a $B\bar{K}$ molecular state?Jul 19 2016Jul 28 2016In this work, we perform a dynamical study of the $B^{(*)}$ and $\bar K$ interaction and show that the newly reported $X(5568)$ or $X(5616)$ cannot be assigned to be an isovector $B\bar{K}$ or $B^*\bar{K}$ molecular state. We continue to investigate the ... More
The Complete Weight Enumerator of A Class of Linear CodesMay 25 2015May 26 2015Linear codes can be employed to construct authentication codes, which is an interesting area of cryptography. The parameters of the authentication codes depend on the complete weight enumerator of the underlying linear codes. In order to obtain an authentication ... More
New $Ω_c^0$ baryons discovered by LHCb as the members of $1P$ and $2S$ statesApr 09 2017Nov 20 2017Inspired by the newly observed $\Omega_c^0$ states at LHCb, we decode their properties by performing an analysis of mass spectrum and decay behavior. Our studies show that the five narrow states, i.e., $\Omega_c(3000)^0$, $\Omega_c(3050)^0$, $\Omega_c(3066)^0$, ... More
Is radio jet power linearly proportional to the product of central black hole mass and Eddington ratio in AGN?Sep 05 2014A model for the relation between radio jet power and the product of central black hole (BH) mass and Eddington ratio of AGN is proposed, and the model is examined with data from the literature. We find that radio jet power positively correlates but not ... More
Assigning the newly reported $Σ_b(6097)$ as a $P$-wave excited state and predicting its partnersSep 30 2018Nov 01 2018The newly observed $\Sigma_b(6097)$ provides us a good chance to further construct the high excited states of the bottom baryon family. In this work, we explain the $\Sigma_b(6097)$ to be a $1P$ state with $J^P=5/2^-$ or $3/2^-$ by giving the mass spectrum ... More
The signal of $Z^\pm(4430)$ in nucleon-antinucleon scatteringJun 05 2008Oct 02 2008We study the production of $Z^\pm(4430)$ at a nucleon-antinucleon scattering experiment. Considering the PANDA experiment to be an ideal platform to explore the production of the charmonium and charmonim-like states, we suggest the forthcoming PANDA experiment ... More
Predicted charged charmonium-like structures in the hidden-charm dipion decay of higher charmoniaJun 27 2011Aug 04 2011In this work, we predict two charged charmonium-like structures close to the $D^\ast\bar{D}$ and $D^\ast\bar{D}^\ast$ thresholds, where the Initial Single Pion Emission mechanism is introduced in the hidden-charm dipion decays of higher charmonia $\psi(4040)$, ... More
On two-parameter deformations of $osp(1|2)^(1)$Mar 07 2000Mar 30 2000An elliptic two-parameter deformation of the (universal enveloping superalgebra of) affine Lie superalgebra $osp(1|2)^{(1)}$ is proposed in terms of free boson realization. This deformed superalgebra is shown to fit in the framework of infinite Hopf family ... More
$Z_b(10610)$ and $Z_b(10650)$ structures produced by the initial single pion emission in the $Υ(5S)$ decaysJun 20 2011Oct 08 2011We propose an unique mechanism called {\it Initial Single Pion Emission} existing in the $\Upsilon(5S)$ decays, and further study the line shapes of $d\Gamma(\Upsilon(5S\to \Upsilon(nS)\pi^+\pi^-))/dm_{\Upsilon(nS)\pi^+}$ ($n=1,2,3$) and $d\Gamma(\Upsilon(5S\to ... More
Q factor in numerical simulations of DPSK with optical delay demodulationApr 01 2003A simple model is used to estimate the Q factor in numerical simulations of differential phase shift keying (DPSK) with optical delay demodulation and balanced detection. It is found that an alternative definition of Q is needed for DPSK in order to have ... More
Parallelizable Algorithms for Optimization Problems with Orthogonality ConstraintsOct 09 2018Oct 24 2018To construct a parallel approach for solving optimization problems with orthogonality constraints is usually regarded as an extremely difficult mission, due to the low scalability of the orthonormalization procedure. However, such demand is particularly ... More
Efficient rare event simulation for failure problems in random mediaApr 16 2014In this paper we study rare events associated to solutions of elliptic partial differential equations with spatially varying random coefficients. The random coefficients follow the lognormal distribution, which is determined by a Gaussian process. This ... More
Possible strange hidden-charm pentaquarks from $Σ_c^{(*)}\bar{D}_s^*$ and $Ξ^{(',*)}_c\bar{D}^*$ interactionsSep 12 2016In a one-boson-exchange model with one-pion and one-eta exchanges, we investigate possible strange hidden-charm pentaquarks produced from the $\Lambda_c\bar{D}_s^*$, $\Sigma_c\bar{D}_s^*$, $\Sigma_c^*\bar{D}_s^*$, $\Xi_c\bar{D}^*$, $\Xi_c'\bar{D}^*$, ... More
Kapranov's Construction of Homotopy Leibniz AlgebrasAug 26 2018Motivated by Kapranov's discovery of an $L_\infty$ algebra structure on the tangent complex of a K\"ahler manifold and Chen-Sti\'enon-Xu's construction of a Leibniz$_\infty[1]$ algebra associated with a Lie pair, we find a general method to construct ... More
On the General Ericksen-Leslie System: Parodi's Relation, Well-posedness and StabilityMay 11 2011Oct 03 2012In this paper we investigate the role of Parodi's relation in the well-posedness and stability of the general Ericksen-Leslie system modeling nematic liquid crystal flows. First, we give a formal physical derivation of the Ericksen-Leslie system through ... More
Global Well-posedness of the Two Dimensional Beris-Edwards System with General Laudau-de Gennes Free EnergyOct 23 2018In this paper, we consider the Beris-Edwards system for incompressible nematic liquid crystal flows. The system under investigation consists of the Navier-Stokes equations for the fluid velocity $\mathbf{u}$ coupled with an evolution equation for the ... More
Newly observed $B(5970)$ and the predictions of its spin and strange partnersFeb 03 2014Apr 30 2014Using the effective Lagrangian approach, we study the decay behavior of the newly observed $B(5970)$ meson, which is assigned as the $2^3S_1$ state in the $B$ meson family. What is more important is that we predict the information of the partial and total ... More
Understanding $B^-\rightarrow X(3823)K^-$ via rescattering mechanism and predicting $B^-\to η_{c2} (^1D_2)/ψ_3(^3D_3)K^-$May 16 2016Jul 20 2016We study the observed $B^-\rightarrow X(3823)K^-$ decay via rescattering mechanism and show that this branching ratio is well reproduced by this mechanism. We further extend this theoretical framework to investigate the decays of $B^-\to\eta_{c2} (^1D_2)/\psi_3(^3D_3)K^-$, ... More
Variation of a Signal in Schwarzschild SpacetimeJul 24 2018Jul 30 2018In this paper, the variation of a signal in Schwarzschild spacetime is studied and a general equation for frequency shift parameter (FSP) is presented. It shows that FSP depends on the gravitationally-modified Doppler effects and the gravitational effects ... More
Reproducing the $Z_c(3900)$ structure through the initial-single-pion-emission mechanismApr 22 2013Aug 15 2013Being stimulated by the recent BESIII observation of a charged charmoniumlike structure $Z_c(3900)$, in this work we study the distributions of the $J/\psi\pi^\pm$ and $\pi^+\pi^-$ invariant mass spectra of the $Y(4260)\to \pi^+\pi^- J/\psi$ decay by ... More
Prediction of anomalous $Υ(5S)\toΥ(1^3D_J)η$ transitionsNov 08 2016In this work, we study the hadronic loop contribution to the $\Upsilon(5S)\to \Upsilon(1^3D_J)\eta$ ($J=1,2,3$) transitions. We predict that the branching ratios of $\Upsilon(5S)\to \Upsilon(1^3D_1)\eta$, $\Upsilon(5S)\to \Upsilon(1^3D_2)\eta$ and $\Upsilon(5S)\to ... More
Observation of $e^+e^-\to χ_{c0}ω$ and missing higher charmonium $ψ(4S)$Nov 19 2014Apr 30 2015Stimulated by the recent BESIII observation of a new resonance in $e^+ e^- \to \omega \chi_{c0}$ and by the fact that this state is consistent with our predicted $\psi(4S)$, in this work we estimate the meson loop contribution to $\psi(4S) \to \omega ... More
Tidal disruption jets of supermassive black holes as hidden sources of cosmic rays: explaining the IceCube TeV-PeV neutrinosDec 29 2015Cosmic ray interactions that produce high-energy neutrinos also inevitably generate high-energy gamma rays, which finally contribute to the diffuse high-energy gamma-ray background after they escape the sources. It was recently found that, the high flux ... More
Modeling the broadband emission of Fermi/LAT GRB 090902BSep 07 2010Dec 22 2010GRB 090902B, detected by Fermi Large Array Telescope (Fermi/LAT), shows extend high-energy emission (>100 MeV) up to 10^3 s after the burst, which decays with time in a power-law as t^{-1.5}. It has been also observed by several follow-up low-energy instruments, ... More
Proposal of searching for the $Υ(6S)$ hadronic decays into $Υ(nS)$ plus $η^{(\prime)}$Jul 24 2018Sep 03 2018In this work, we propose a possible experimental research topic on the $\Upsilon(6S)\to \Upsilon(nS)\eta^{(\prime)}$ ($n=1,2,3$) transitions. Considering the hadronic loop effect from the intermediate $S$-wave $B_{(s)}$ and $B_{(s)}^*$ mesons, we estimate ... More
The physical fundamental plane of black hole activity: revisitedNov 27 2015The correlation between the jet power and accretion disk luminosity is investigated for active galactic nuclei (AGNs) and black hole X-ray binaries (BHXBs) from the literature. The power-law correlation index is steep ($\mu \sim$ 1.0--1.4) for radio loud ... More
Can friction of the nova envelope account for the extra angular momentum loss in cataclysmic variables?Nov 21 2018It has been shown that the rate of angular momentum loss (AML) in cataclysmic variables (CVs) below the period gap is about 2.47 times that caused by gravitational radiation, suggesting extra AML mechanism besides gravitational radiation. Several potential ... More
On the White Dwarf Mass Problem of Cataclysmic VariablesSep 22 2016Recent observations show that the white dwarfs (WDs) in cataclysmic Variables (CVs) have an average mass significantly higher than isolated WDs and WDs in post-common envelope binaries (PCEBs), which are thought to the progenitors of CVs. This suggests ... More
Hidden-charm molecular pentaquarks and their charm-strange partnersJan 13 2016Apr 06 2016In the framework of one-pion-exchange (OPE) model, we study the hidden-charm and charm-strange molecular pentaquark systems composed of a heavy baryon $(\Sigma_c, \Sigma_c^*)$ and a vector meson $(\bar{K}^*, \bar{D}^*)$, where the S-D mixing effect is ... More
Variation of a Signal in Schwarzschild SpacetimeJul 24 2018Mar 15 2019In this paper, the variation of a signal in Schwarzschild spacetime is studied and a general equation for frequency shift parameter (FSP) is presented. It shows that FSP depends on the gravitationally-modified Doppler effects and the gravitational effects ... More
Distributed Space-Time Coding for Full-Duplex Asynchronous Cooperative CommunicationsOct 08 2013In this paper, we propose two distributed linear convolutional space-time coding (DLC-STC) schemes for full-duplex (FD) asynchronous cooperative communications. The DLC-STC Scheme 1 is for the case of the complete loop channel cancellation, which achieves ... More
Electronic structures of quasi-one-dimensional cuprate superconductors Ba$_2$CuO$_{3+δ}$Jan 31 2019An intact CuO$_2$ plane is widely believed to be a prerequisite for the high-$T_c$ superconductivity in cuprate superconductors. However, an exception may exist in the superconducting Ba$_2$CuO$_{3+\delta}$ materials where CuO chains play a more important ... More
Extension formulae on almost complex manifoldsMar 23 2019Apr 15 2019We give the extension formulae on almost complex manifolds and give decompositions of the extension formulae. As an application, we study the $(n,0)$-Dolbeault cohomology group on almost complex manifolds under some conditions.
Correlation analysis of radio properties and accretion-disk luminosity for low luminosity AGNsNov 26 2016The correlation between the jet power and accretion disk luminosity is investigated and analyzed with our model for 7 samples of low luminosity active galactic nuclei (LLAGNs). The main results are: (1) the power-law correlation index ($P_{jet} \propto ... More
Biaxial-stress driven tetragonal symmetry breaking in and high-temperature ferromagnetic semiconductor from half-metallic CrO2Jun 15 2017Dec 24 2017It is highly desirable to combine the full spin polarization of carriers with modern semiconductor technology for spintronic applications. For this purpose, one needs good crystalline ferromagnetic (or ferrimagnetic) semiconductors with high Curie temperatures. ... More
Explaining the anomalous $Υ(5S)\to χ_{bJ}ω$ decays through the hadronic loop effectJun 26 2014Aug 20 2014In this work, we carry out the study on $\Upsilon(5S)\to \chi_{bJ}\omega$ ($J=0,1,2$) by considering the hadronic loop mechanism. Our results show that the Belle's preliminary data of the branching ratios for $\Upsilon(5S)\to \chi_{bJ}\omega$ can be well ... More
Charged bottomonium-like structures in the hidden-bottom dipion decays of $Υ(11020)$Aug 22 2011Oct 11 2011Under the Initial Single Pion Emission mechanism, we study the hidden-bottom dipion decays of $\Upsilon(11020)$, i.e., $\Upsilon(11020)\to \Upsilon(nS)\pi^+\pi^-$ $(n=1,2,3)$ and $\Upsilon(11020)\to h_b(mP)\pi^+\pi^-$ $(m=1,2)$. We predict explicit sharp ... More
Prediction of charmoniumlike structures in the hidden-charm di-eta decays of higher charmoniaSep 18 2013Oct 23 2014Considering the situation that a single chiral partilce, $\eta$, is initially emitted, we study the hidden-charm di-eta decays of charmoniumlike state $Y(4660)$ and the predicted charmonium $\psi(4790)$, i.e., $Y(4660)/\psi(4790) \to J/\psi\eta\eta$ through ... More
Interpretation of $Z_b(10610)$ and $Z_b(10650)$ in the ISPE mechanism and the Charmonium CounterpartAug 12 2012Aug 20 2012The initial single pion emission (ISPE) mechanism is applied to the processes $\Upsilon(5S)\to \pi B^{(*)}\bar{B}^{(*)}$ whose details have been recently reported at ICHEP2012 and we obtain reasonable agreement with Bell's measurements, i.e., we succeed ... More
Possible strange hidden-charm pentaquarks from $Σ_c^{(*)}\bar{D}_s^*$ and $Ξ^{(',*)}_c\bar{D}^*$ interactionsSep 12 2016Aug 15 2017Using the one-boson-exchange model, we investigate the $\Lambda_c\bar{D}_s^*$, $\Sigma_c\bar{D}_s^*$, $\Sigma_c^*\bar{D}_s^*$, $\Xi_c\bar{D}^*$, $\Xi_c'\bar{D}^*$, and $\Xi_c^*\bar{D}^*$ interactions by considering the one-eta-exchange and/or one-pion-exchange ... More
Heavy molecules and one-$σ/ω$-exchange modelJul 26 2017Dec 20 2017In the framework of the one-boson-exchange model, we explore whether the intermediate and short-range forces from $\sigma/\omega$-exchange can be strong enough to bind heavy molecular states. $\Lambda_cD(\bar{D})$, and $\Lambda_c\Lambda_c(\bar{\Lambda}_c)$ ... More
Implication the observed $ψ(3770)\to p\bar{p}π^0$ for studying the $p\bar{p}\to ψ(3770)π^0$ processMay 18 2015Mar 31 2016We study the charmonium $p \bar{p} \to \psi(3770) \pi^0$ reaction using effective lagrangian approach where the contributions from well established $N^*$ states are considered, and all parameters are fixed in the process of $e^+e^- \to p \bar{p}\pi^0$ ... More
Newly observed $Λ_c(2860)^+$ at LHCb and its \emph{D}-wave partners $Λ_c(2880)^+$, $Ξ_c(3055)^+$ and $Ξ_c(3080)^+$Feb 14 2017Apr 16 2017New resonance $\Lambda_c(2860)^+$, reported by LHCb, is a key to establish \emph{D}-wave charmed and charmed-strange baryon families. In this work, we first carry out an analysis of mass spectra of the $\lambda$-mode excited charmed and charmed-strange ... More
Smart wing rotation and ingenious leading edge vortex control modulate the unconventional forces during insects flightsNov 13 2018Compared with fixed-wing flight, flapping flight can generate a higher lift and is also more maneuverable, largely resulting from the benefits of wing rotation. By analyzing the real wing kinematics of fruit flies, we found that the wing rotation is smart ... More
Exotic B_c-like molecules in QCD Sum RulesMar 29 2012Oct 24 2012We use the QCD sum rules to study possible $B_c$-like molecular states. We consider isoscalar $J^P = 0^+$ and $J^P = 1^+ D^{(\ast)}B^{(\ast)}$ molecular currents. We consider the contributions of condensates up to dimension eight and we work at leading ... More
The optical selection rules of a graphene quantum dot in external electric fieldsMar 13 2017Mar 27 2017We study theoretically the single-electron triangular zigzag graphene quantum dot in three typical in-plane electric fields. The far-infrared absorption spectra of the dot are calculated by the tight-binding method and then the optical selection rules ... More
The maximum degree resistance distance of cactiNov 15 2015Apr 17 2016Various topological indices, based on the distances between the vertices of a graph, are widely used in theoretical chemistry. The degree resistance distance of a graph $G$ is defined as ${D_R}(G) = \sum\limits_{\{u,v\} \subseteq V(G)} {[d(u) + d(v)]R(u,v)},$ ... More
A Simple Model of Scale-free Networks Driven by both Randomness and AdaptabilitySep 13 2004Sep 22 2004In this paper, we present a simple model of scale-free networks that incorporates both preferential & random attachment and anti-preferential & random deletion at each time step. We derive the degree distribution analytically and show that it follows ... More
Evolution of post-Accretion Induced Collapse Binaries: the Effect of EvaporationNov 06 2017Accretion-induced collapse (AIC) is widely accepted to be one of the formation channels for millisecond pulsars (MSPs). Since the MSPs have high spindown luminosities, they can immediately start to evaporate their companion stars after birth. In this ... More
Predictions of charged charmonium-like structures with hidden-charm and open-strange channelsMar 27 2013Jun 06 2013We propose the initial single chiral particle emission mechanism, with which the hidden-charm di-kaon decays of higher charmonia and charmonium-like states are studied. Calculating the distributions of differential decay width, we obtain the line shape ... More
New structure around 3250 MeV in the baryonic B decay and the $D^*_0(2400)N$ molecular hadronApr 28 2012Aug 04 2012In this work, we first propose the isovector $nD^{*}_0(2400)^0$ molecular state to explain the enhancement structure around 3250 MeV ($X_c(3250)^0$) in the $\Sigma_c^{++}\pi^-\pi^-$ invariant mass spectrum newly observed by the BaBar Collaboration. Under ... More
Diffuse PeV neutrinos from gamma-ray burstsDec 06 2012Jan 30 2013The IceCube collaboration recently reported the potential detection of two cascade neutrino events in the energy range 1-10 PeV. We study the possibility that these PeV neutrinos are produced by gamma-ray bursts (GRBs), paying special attention to the ... More
Anomalous radiative transitions between $h_b(nP)$ and $η_b(mS)$ and hadronic loop effectApr 01 2013May 03 2013In this work, we introduce the hadronic loop contribution to explain the anomalous radiative transitions between $h_b(nP)$ and $\eta_b(mS)$, which was recently observed by the Belle Collaboration. Our calculation shows that the hadronic loop mechanism ... More
A novel explanation of charmonium-like structure in $e^+e^-\to ψ(2S)π^+π^-$Jan 13 2011Mar 25 2011We first present a non-resonant description to charmonium-like structure $Y(4360)$ in the $\psi(2S)\pi^+\pi^-$ invariant mass spectrum of the $e^+e^-\to \psi(2S)\pi^+\pi^-$ process. The $Y(4360)$ structure is depicted well by the interference effect of ... More
On the relation of accretion rate and spin induced jet power in low luminosity AGNOct 09 2014From Liu and Han (2014), the accretion-dominated jet power has a linear proportionality with the accretion rate, whereas the power law index is <=0.5 at lower accretion rate. Attributing the jet power in low accretion rate AGN to the black hole spin, ... More
Towards two-body strong decay behavior of higher $ρ$ and $ρ_3$ mesonsJun 24 2013Jul 23 2013In this work, we systematically study the two-body strong decay of the $\rho/\rho_3$ states, which are observed and grouped into the $\rho/\rho_3$ meson family. By performing the phenomenological analysis, the underlying properties of these states are ... More
Ultrafast laser writing quill effect in low loss waveguide fabrication regimeJul 03 2018Quill effect, one of the intriguing phenomena in ultrafast laser writing, to our knowledge, has not been studied in low-loss-waveguide (LLW) writing regime yet, probably due to its invisibility under conventional white-light microscope in that regime. ... More
Searching for possible $Ω_c-$like molecular states from $Ξ_{c}^{*}\bar{K}/Ξ_c\bar{K}^*/Ξ_c'\bar{K}^*$ interactionNov 21 2017Jan 26 2018Stimulated by the observations of recent observation of $\Omega_c$ as well as former one of $P_c(4380)$ and $P_c(4450)$, we perform a coupled channel analysis of $\Xi_c^*\bar{K}/\Omega_c\eta/\Omega_c^*\eta/\Xi_c\bar{K}^*/\Xi_c'\bar{K}^*/\Omega_c\omega$ ... More
Distributed Linear Convolutional Space-Time Coding for Two-Relay Full-Duplex Asynchronous Cooperative NetworksOct 08 2013In this paper, a two-relay full-duplex asynchronous cooperative network with the amplify-and-forward (AF) protocol is considered. We propose two distributed space-time coding schemes for the cases with and without cross-talks, respectively. In the first ... More
Asymptotic Behavior for a Nematic Liquid Crystal Model with Different Kinematic Transport PropertiesJan 13 2009Oct 29 2010We study the asymptotic behavior of global solutions to hydrodynamical systems modeling the nematic liquid crystal flows under kinematic transports for molecules of different shapes. The coupling system consists of Navier-Stokes equations and kinematic ... More
Some results on L-dendriform algebrasApr 02 2011We introduce a notion of L-dendriform algebra due to several different motivations. L-dendriform algebras are regarded as the underlying algebraic structures of pseudo-Hessian structures on Lie groups and the algebraic structures behind the $\mathcal ... More
L-quadri-algebrasApr 02 2011Quadri-algebras introduced by Aguiar and Loday are a class of remarkable Loday algebras. In this paper, we introduce a notion of L-quadri-algebra with 4 operations satisfying certain generalized left-symmetry, as a Lie algebraic analogue of quadri-algebra ... More
Goldstone and Higgs modes of photons inside a cavityDec 12 2013Goldstone and Higgs modes have been detected in various condensed matter, cold atom and particle physics experiments. Here, we demonstrate that the two modes can also be observed in optical systems with only a few (artificial) atoms inside a cavity. We ... More
Possible triple-charm molecular pentaquarks from $Ξ_{cc}D_1/Ξ_{cc}D_2^*$ interactionsJan 06 2019In this work, we explore a systematic investigation on $S$-wave interactions between a doubly-charmed baryon $\Xi_{cc}(3621)$ and a charmed meson in a $T$-doublet $(D_1,\,D_2^*)$. We firstly analyze the possibility for forming $\Xi_{cc}D_1/\Xi_{cc}D_2^*$ ... More
Duality, Polite Water-filling, and Optimization for MIMO B-MAC Interference Networks and iTree NetworksApr 14 2010Feb 04 2014This paper gives the long sought network version of water-filling named as polite water-filling. Unlike in single-user MIMO channels, where no one uses general purpose optimization algorithms in place of the simple and optimal water-filling for transmitter ... More
MEGCOM: Min-Energy Group COMmunication in Multi-hop Wireless NetworksFeb 08 2012Feb 19 2012Given the increasing demand from wireless applications, designing energy-efficient group communication protocols is of great importance to multi-hop wireless networks. A group communication session involves a set of member nodes, each of them needs to ... More
Hidden-charm molecular pentaquarks in the coupled channels of $Σ_c^{(*)}(Λ_c)$-$\bar D_1(\bar D_2^*)$May 09 2019In a framework of one-boson-exchange potential model, we systematically investigate interactions between a charmed baryon $\mathcal{B}_{c}^{(*)}=\Lambda_c/\Sigma_c/\Sigma_c^{*}$ and an anti-charmed meson $\bar T=\bar D_1/\bar D_2^*$. Both $S$-$D$ wave ... More
Predictions of the hidden-charm molecular states with four-quark componentNov 11 2015May 31 2016In this work, we study the $T\bar{T}$-type molecular systems systematically via one pion exchange model, where $T$ denotes the narrow $J^P=1^+$ $D_1$ meson or $2^+$ $D_2^*$ meson and $\bar{T}$ is its antiparticle. With the effective potentials, we try ... More
$D D^{*}$ potentials in chiral perturbation theory and possible molecular statesAug 23 2017Jan 06 2019The $DD^{*}$ potentials are studied within the framework of heavy meson chiral effective field theory. We have obtained the effective potentials of the $DD^{*}$ system up to $O(\epsilon^2)$ at one loop level. In addition to the one-pion exchange contribution, ... More
Molecular spring: from spider silk to silkworm silkFeb 20 2009In this letter, we adopt a new approach combining theoretical modeling with silk stretching measurements to explore the mystery of the structures between silkworm and spider silks, leading to the differences in mechanical response against stretching. ... More
Study on contributions of hadronic loops to decays of $J/ψ\to$ vector $+$ pseudoscalar mesonsJun 19 2006Sep 22 2006In this work, we evaluate the contributions of the hadronic loops to the amplitudes of $J/\psi\to PV$ where $P$ and $V$ denote light pseudoscalar and vector mesons respectively. By fitting data of two well measured channels of $J/\psi\to PV$, we obtain ... More
Optimally estimating the sample mean from the sample size, median, mid-range and/or mid-quartile rangeMay 21 2015Oct 04 2016The era of big data is coming, and evidence-based medicine is attracting increasing attention to improve decision making in medical practice via integrating evidence from well designed and conducted clinical research. Meta-analysis is a statistical technique ... More
Geometric field theory and weak Euler-Lagrange equation for classical relativistic particle-field systemsOct 17 2016Nov 21 2017A manifestly covariant, or geometric, field theory for relativistic classical particle-field system is developed. The connection between space-time symmetry and energy-momentum conservation laws for the system is established geometrically without splitting ... More
Variational Symplectic Particle-in-cell Simulation of Nonlinear Mode Conversion from Extraordinary waves to Bernstein WavesJun 12 2015Sep 29 2015In this paper, the nonlinear mode conversion of extraordinary waves in nonuniform magnetized plasmas is studied using the variational symplectic particle-in-cell simulation. The accuracy of the nonlinear simulation is guaranteed by the long-term accuracy ... More
Photon Berry phases, Instantons, Schrodinger Cats with oscillating parities and crossover from $ U(1) $ to $ Z_2 $ limit in cavity QED systemsJun 23 2015Dec 31 2015In this work, we study the $ U(1)/Z_2 $ Dicke model at a finite $ N $ by using the $ 1/J $ expansion and exact diagonization. This model includes the four standard quantum optics model as its various special limits. The $ 1/J $ expansions is complementary ... More
Electronic structure, magnetism, and optical properties of orthorhombic GdFeO3 from first principlesOct 28 2016Orthorhombic GdFeO$_3$ has attracted considerable attention in recent years because its magnetic structure is similar to that in the well-known BiFeO$_3$ material. We investigate electronic structure, magnetism, and optical properties of the orthorhombic ... More
Contribution of final state interaction to the branching ratio of $B\to J/ψD$May 19 2008May 20 2008To testify the validity of the perturbative QCD (pQCD) and investigate its application range, one should look for a suitable process to do the job. $B\to J/\psi D$ is a promising candidate. The linear momentum of the products is relatively small, so that ... More
Stellar loci II. a model-free estimate of the binary fraction for field FGK starsDec 03 2014We propose a Stellar Locus OuTlier (SLOT) method to determine the binary fraction of main-sequence stars statistically. The method is sensitive to neither the period nor mass-ratio distributions of binaries, and able to provide model-free estimates of ... More
Stellar loci I. Metallicity dependence and intrinsic widthsDec 03 2014Stellar loci are widely used for selection of interesting outliers, reddening determinations, and calibrations. However, hitherto the dependence of stellar loci on metallicity has not been fully explored and their intrinsic widths are unclear. In this ... More
New Vacuum Solar Telescope observations of a flux rope tracked by a filament activationMar 04 2014One main goal of the New Vacuum Solar Telescope (NVST) which is located at the \emph{Fuxian Solar Observatory} is to image the Sun at high resolution. Based on the high spatial and temporal resolution NVST H$\alpha$ data and combined with the simultaneous ... More
Scale-Invariant Structure Saliency Selection for Fast Image FusionOct 30 2018In this paper, we present a fast yet effective method for pixel-level scale-invariant image fusion in spatial domain based on the scale-space theory. Specifically, we propose a scale-invariant structure saliency selection scheme based on the difference-of-Gaussian ... More
Texture Characterization by Using Shape Co-occurrence PatternsFeb 10 2017Texture characterization is a key problem in image understanding and pattern recognition. In this paper, we present a flexible shape-based texture representation using shape co-occurrence patterns. More precisely, texture images are first represented ... More
Neutrino Mass and Mixing with $A_5$ Modular SymmetryMar 29 2019We present a comprehensive analysis of neutrino mass and lepton mixing in theories with $A_5$ modular symmetry. We construct the weight 2, weight 4 and weight 6 modular forms of level 5 in terms of Dedekind eta-functions and Klein forms, and their decomposition ... More
Testing normality using the summary statistics with application to meta-analysisJan 29 2018As the most important tool to provide high-level evidence-based medicine, researchers can statistically summarize and combine data from multiple studies by conducting meta-analysis. In meta-analysis, mean differences are frequently used effect size measurements ... More
High-spin mesons below 3 GeVMay 15 2015Jul 02 2015In this work, we study the high-spin states with masses below 3 GeV observed in experiments and we perform analysis of mass spectrum and investigation of strong decay behaviors of the high-spin states. Comparing our results with the experimental data, ... More
Pseudotensor meson familyOct 15 2014Jan 14 2015The pseudoscalar tensor states, $\pi_2$, $\eta_2$, and $K_2$, are systematically studied through the Okubo-Zweig-Iizuka- allowed two-body strong decays, including both the observed states reported by the Particle Data Group and the predicted states. Phenomenological ... More
How to detect super-massive binary black holes at parsec scalesOct 09 2014Jan 05 2015It is difficult to find or identifying the binary black holes in parsec scales, since the dual AGN may be merged quickly. It is required to explore more possibilities to identifying binary black holes in parsec scales, we give some discussions, especially ... More
Exploration of charmed pentaquarksJul 10 2014Mar 13 2015In this work, we explore the charmed pentaquarks, where the relativistic five-quark equations are obtained by the dispersion relation technique. By solving these equations with the method based on the extraction of the leading singularities of the amplitudes, ... More
Charm Physics - A Field Full with Challenges and OpportunitiesAug 19 2008Aug 26 2008In this review, we discuss some interesting issues in charm physics which is full with puzzles and challenges. So far in the field there exist many problems which have not obtained satisfactory answers yet and more unexpected phenomena have been observed ... More
Production of charmed baryon $Λ_c(2940)^+$ at PANDASep 26 2011Nov 25 2011In this work we evaluate the production rate of the charmed baryon $\Lambda_c(2940)^+$ at PANDA. For possible assignments of $\Lambda_c(2940)^+$: $J^P=1/2^\pm$, $3/2^\pm$ and $5/2^\pm$, the total cross section of $p\bar{p}\to \bar{\Lambda}_c \Lambda_c(2940)^+$ ... More
European VLBI Network observations of fourteen GHz-Peaked-Spectrum radio sources at 5 GHzMar 21 2006We present the results of EVN polarization observations of fourteen GHz-Peaked-Spectrum (GPS) radio sources at 5 GHz. These sources were selected from bright GPS source samples and we aimed at finding Compact Symmetric Objects (CSOs). We have obtained ... More
Thermodynamics of 2+1 Flavor Polyakov-Loop Quark-Meson Model under External Magnetic FieldFeb 11 2019Apr 04 2019We study the thermodynamics of QCD system under external magnetic field via the 2+1 flavor Polyakov-loop quark-meson model. To incorporate quantum and thermal fluctuations, the functional renormalization group approach is implemented in our work. Pressure, ... More
Topology change and nuclear symmetry energy in compact-star matterNov 25 2018Jan 07 2019We show that the cusp-like structure in the nuclear symmetry energy, a consequence of topology change, visible in the skyrmion lattice description of dense matter is extremely robust. It is present in the Skyrme model -- with the pion field only -- and ... More
Biaxial-stress-driven full spin polarization in ferromagnetic hexagonal chromium tellurideAug 08 2016Sep 14 2016It is important to spintronics to achieve fully-spin-polarized magnetic materials that are stable and can be easily fabricated. Here, through systematical density-functional-theory investigations, we achieve high and even full spin polarization for carriers ... More
$D_{sJ}(2860)$ and $D_{sJ}(2715)$Sep 04 2006Jan 12 2007Recently Babar Collaboration reported a new $c\bar{s}$ state $D_{sJ}(2860)$ and Belle Collaboration observed $D_{sJ}(2715)$. We investigate the strong decays of the excited $c\bar{s}$ states using the $^{3}P_{0}$ model. After comparing the theoretical ... More
Multiple Learning for Regression in big dataMar 03 2019Regression problems that have closed-form solutions are well understood and can be easily implemented when the dataset is small enough to be all loaded into the RAM. Challenges arise when data is too big to be stored in RAM to compute the closed form ... More
Relation-Shape Convolutional Neural Network for Point Cloud AnalysisApr 16 2019Apr 22 2019Point cloud analysis is very challenging, as the shape implied in irregular points is difficult to capture. In this paper, we propose RS-CNN, namely, Relation-Shape Convolutional Neural Network, which extends regular grid CNN to irregular configuration ... More
Puzzle of the $Λ_c$ spectrumOct 30 2016There is a puzzle in the $\Lambda_c^+$ family, i.e., one member with $J^P=3/2^+$ is missing in a $L=2$ multiplet which the heavy quark effective theory predicts, and $J^P$'s of $\Lambda_c(2765)^+$ and $\Lambda_c(2940)^+$ are unknown. Using a light diquark ... More