Searching Arxiv, refresh for possibly better results.

Results for "Chenwei Lou"

total 971took 0.13s
"Tom" pet robot applied to urban autismMay 14 2019With the fast development of network information technology, more and more people are immersed in the virtual community environment brought by the network, ignoring the social interaction in real life. The consequent urban autism problem has become more ... More
Beyond One-Way Communication: Degrees of Freedom of Multi-Way Relay MIMO Interference NetworksJan 22 2014We characterize the degrees of freedom (DoF) of multi-way relay MIMO interference networks. In particular, we consider a wireless network consisting of 4 user nodes, each with M antennas, and one N-antenna relay node. In this network, each user node sends ... More
Nano-optical imaging of monolayer MoSe2 using tip-enhanced photoluminescenceApr 07 2017Apr 11 2017Band gap tuning in two-dimensional transitional metal dichalcogenides (TMDs) is crucial in fabricating new optoelectronic devices. High resolution photoluminescence (PL) microscopy is needed for accurate band gap characterization. We performed tip-enhanced ... More
Quantum plasmonic hot-electron injection in lateral WSe2/MoSe2 heterostructuresDec 07 2017Jul 11 2018Lateral two-dimensional (2D) transitional metal dichalcogenide (TMD) heterostructures have recently attracted a wide attention as promising materials for optoelectronic nanodevices. Due to the nanoscale width of lateral heterojunctions, the study of their ... More
On-the-fly Uplink Training and Pilot Code Sequence Design for Cellular NetworksNov 06 2018Cellular networks of massive MIMO base-stations employing TDD/OFDM and relying on uplink training for both downlink and uplink transmission are viewed as an attractive candidate for 5G deployments, as they promise high area spectral and energy efficiencies ... More
Aiming Perfectly in the Dark - Blind Interference Alignment through Staggered Antenna SwitchingFeb 15 2010We propose a blind interference alignment scheme for the vector broadcast channel where the transmitter is equipped with M antennas and there are K receivers, each equipped with a reconfigurable antenna capable of switching among M preset modes. Without ... More
Subspace Alignment Chains and the Degrees of Freedom of the Three-User MIMO Interference ChannelSep 20 2011We show that the 3 user M_T x M_R MIMO interference channel has d(M,N)=min(M/(2-1/k),N/(2+1/k)) degrees of freedom (DoF) normalized by time, frequency, and space dimensions, where M=min(M_T,M_R), N=max(M_T,M_R), k=ceil{M/(N-M)}. While the DoF outer bound ... More
On the Degrees of Freedom of Finite State Compound Wireless Networks - Settling a Conjecture by Weingarten et. alSep 23 2009We explore the degrees of freedom (DoF) of three classes of finite state compound wireless networks in this paper. First, we study the multiple-input single-output (MISO) finite state compound broadcast channel (BC) with arbitrary number of users and ... More
Multiple Unicast Capacity of 2-Source 2-Sink NetworksApr 05 2011We study the sum capacity of multiple unicasts in wired and wireless multihop networks. With 2 source nodes and 2 sink nodes, there are a total of 4 independent unicast sessions (messages), one from each source to each sink node (this setting is also ... More
Desensitized Kalman Filtering with Analytical GainApr 20 2015The possible methodologies to handle the uncertain parameter are reviewed. The core idea of the desensitized Kalman filter is introduced. A new cost function consisting of a posterior covariance trace and trace of a weighted norm of the state error sensitivities ... More
Discounting with Imperfect CollateralFeb 14 2017Aug 25 2017Cash collateral is perfect in that it provides simultaneous counterparty credit risk protection and derivatives funding. Securities are imperfect collateral, because of collateral segregation or differences in CSA haircuts and repo haircuts. Moreover, ... More
Liability-side Pricing of Swaps and Coherent CVA and FVA by Regression/SimulationDec 23 2015An uncollateralized swap hedged back-to-back by a CCP swap is used to introduce FVA. The open IR01 of FVA, however, is a sure sign of risk not being fully hedged, a theoretical no-arbitrage pricing concern, and a bait to lure market risk capital, a practical ... More
Repo Haircuts and Economic CapitalApr 19 2016Oct 29 2016This article develops a haircut model by treating repos as debt investments and seeks haircuts to control counterparty contingent exposure to asset price gap risk. It corroborates well with empirically stylized facts, explains tri-party and bilateral ... More
MVA Transfer PricingDec 23 2015Jul 28 2016This article prices OTC derivatives with either an exogenously determined initial margin profile or endogenously approximated initial margin. In the former case, margin valuation adjustment (MVA) is defined as the liability-side discounted expected margin ... More
Extending the Black-Scholes Option Pricing Theory to Account for an Option Market Maker's Funding CostsOct 15 2015An option market maker incurs funding costs when carrying and hedging inventory. To hedge a net long delta inventory, for example, she pays a fee to borrow stock from the securities lending market. Because of haircuts, she posts additional cash margin ... More
Necessary and Sufficient Conditions for Distinguishability of Linear Control SystemsFeb 14 2011Feb 18 2011Distinguishability takes a crucial rule in studying observability of hybrid system such as switched system. Recently, for two linear systems, Lou and Si gave a condition not only necessary but also sufficient to the distinguishability of linear systems. ... More
Optimality Conditions for Semilinear Parabolic Equations with Controls in Leading TermAug 19 2010An optimal control problem for semilinear parabolic partial differential equations is considered. The control variable appears in the leading term of the equation. Necessary conditions for optimal controls are established by the method of homogenizing ... More
On-diagonal Heat Kernel Lower Bound for Strongly Local Symmetric Dirichlet FormsSep 15 2016Oct 08 2016This paper studies strongly local symmetric Dirichlet forms on general measure spaces. The underlying space is equipped with the intrinsic metric induced by the Dirichlet form, with respect to which the metric measure space does not necessarily satisfy ... More
Brownian Motion with Drift on Spaces with Varying DimensionOct 31 2016Nov 07 2016In this paper, we study Brownian motion with drift on spaces with varying dimension. Such a process can be conveniently defined by a regular Dirichlet form that is not necessarily symmetric. The drift term is in some type of L^p space with p depending ... More
Coherent CVA and FVA with Liability Side Pricing of DerivativesOct 25 2015This article presents FVA and CVA of a bilateral derivative in a coherent manner, based on recent developments in fair value accounting and ISDA standards. We argue that a derivative liability, after primary risk factors being hedged, resembles in economics ... More
A Remark on the Zero Number Diminishing PropertySep 02 2018The so-called {\it zero number diminishing property} (or {\it zero number argument}) is a powerful tool in qualitative studies of one dimensional parabolic equations, which says that, under the zero or non-zero Dirichlet boundary conditions, the number ... More
Desensitized Cubature Kalman Filter with Uncertain ParameterDec 24 2015A robust desensitized cubature Kalman filtering (DCKF) for nonlinear systems with uncertain parameter is proposed. Sensitivity matrices are defined as the integral form, and desensitized cost function is designed by penalizing the posterior covariance ... More
Gap Risk KVA and Repo Pricing: An Economic Capital Approach in the Black-Scholes-Merton FrameworkApr 19 2016Oct 29 2016Although not a formal pricing consideration, gap risk or hedging errors are the norm of derivatives businesses. Starting with the gap risk during a margin period of risk of a repurchase agreement (repo), this article extends the Black-Scholes-Merton option ... More
Residual symmetries and Bäcklund transformationsAug 05 2013It is proved that for a given truncated Painlev\'e expansion of an arbitrary nonlinear Painlev\'e integrable system, the residue with respect to the singularity manifold is a nonlocal symmetry. The residual symmetries can be localized to Lie point symmetries ... More
Selfsimilar solutions in a sector for a quasilinear parabolic equationAug 21 2010Jun 18 2014We study a two-point free boundary problem in a sector for a quasilinear parabolic equation. The boundary conditions are assumed to be spatially and temporally "self-similar" in a special way. We prove the existence, uniqueness and asymptotic stability ... More
Brownian Motion with Drift on Spaces with Varying DimensionOct 31 2016Nov 01 2016In this paper, we study Brownian motion with drift on spaces with varying dimension. Such a process can be conveniently defined by a regular Dirichlet form that is not necessarily symmetric. The drift term is in some type of L^p space with p depending ... More
Consider Uncertain Parameters based on Sensitivity MatrixMar 29 2015Uncertain parameters of state-space models have always been a considerable problem. Consider Kalman filter (CKF) and desensitized Kalman filter (DKF) are two methods to solve this problem. Based on the sensitivity matrix respected to the uncertain parameter ... More
A Short Proof of Stirling's FormulaDec 18 2013By changing variables in a suitable way and using dominated convergence methods, this note gives a short proof of Stirling's formula and its refinement.
Spatially Inhomogeneous Bernstein's Problem and De Giorgi's ConjectureJan 26 2007Jun 18 2014In this note, we propose Bernstein's problem and De Giorgi's conjecture for spatially inhomogeneous equations, as well as De Giorgi's conjecture for system of reaction-diffusion equations.
On-diagonal Heat Kernel Lower Bound for Strongly Local Symmetric Dirichlet FormsSep 15 2016Oct 21 2016This paper studies strongly local symmetric Dirichlet forms on general measure spaces. The underlying space is equipped with the intrinsic metric induced by the Dirichlet form, with respect to which the metric measure space does not necessarily satisfy ... More
BES Results on Inclusive D Meson DecaysMar 24 1999A preliminary measurement of branching fractions of the D0 and D+ mesons into the phi meson is reported. The result is based on a data sample of 22.3 pb-1 collected at the CM energy of 4.03 GeV with the BES detector operated at the BEPC e+e- storage ring. ... More
Repo Pricing and Gap RiskApr 19 2016Sep 04 2016Although not a formal pricing consideration, gap risk or hedging errors are the norm of derivatives businesses. Starting with the gap risk during a margin period of risk of a repurchase agreement (repo), this article extends the Black-Scholes-Merton option ... More
Repo Haircuts and Economic CapitalApr 19 2016This article presents a model of haircuts and economic capital for repo. We propose a credit approach to solve haircuts such that the exposure to market risk meets a prescribed credit rating scale measured by expected loss. Specifically for securities ... More
Second-Order Necessary/Sufficient Conditions for Optimal Control Problems in the Absence of Linear StructureAug 05 2010Second-order necessary conditions for optimal control problems are considered, where the ``second-order" is in the sense of that Pontryagin's maximum principle is viewed as a first-order necessary optimality condition. A sufficient condition for a local ... More
Data-driven Blockbuster Planning on Online Movie Knowledge LibraryOct 24 2018In the era of big data, logistic planning can be made data-driven to take advantage of accumulated knowledge in the past. While in the movie industry, movie planning can also exploit the existing online movie knowledge library to achieve better results. ... More
Interference Alignment with Asymmetric Complex Signaling - Settling the Host-Madsen-Nosratinia ConjectureApr 01 2009It has been conjectured by Host-Madsen and Nosratinia that complex Gaussian interference channels with constant channel coefficients have only one degree-of-freedom regardless of the number of users. While several examples are known of constant channels ... More
Compressed Sensing-based Pilot Assignment and Reuse for Mobile UEs in mmWave Cellular SystemsJan 14 2016Technologies for mmWave communication are at the forefront of investigations in both industry and academia, as the mmWave band offers the promise of orders of magnitude additional available bandwidths to what has already been allocated to cellular networks. ... More
Interference, Cooperation and Connectivity - A Degrees of Freedom PerspectiveMar 30 2011We explore the interplay between interference, cooperation and connectivity in heterogeneous wireless interference networks. Specifically, we consider a 4-user locally-connected interference network with pairwise clustered decoding and show that its degrees ... More
State-aware Anti-drift Robust Correlation TrackingJun 28 2018Correlation filter (CF) based trackers have aroused increasing attentions in visual tracking field due to the superior performance on several datasets while maintaining high running speed. For each frame, an ideal filter is trained in order to discriminate ... More
Argument-based Belief in Topological StructuresJul 27 2017This paper combines two studies: a topological semantics for epistemic notions and abstract argumentation theory. In our combined setting, we use a topological semantics to represent the structure of an agent's collection of evidence, and we use argumentation ... More
A model for retention on short, intermediate and long time-scale in ferroelectric thin filmsDec 04 2008We developed a model with no adjustable parameter for retention loss at short and long time scale in ferroelectric thin-film capacitors. We found that the predictions of this model are in good agreement with the experimental observations in the literature. ... More
How do drops evaporate?Feb 21 2008Oct 22 2008We consider evaporation of pure liquid drops on a thermally conductive substrate. Two evaporative models are considered: one that concentrates on the liquid phase in determining evaporative flux, and the other one that centers on the gas/vapor phase. ... More
On velocity profiles, stresses and Bagnold scaling of sheared granular system in zero gravityNov 17 2004We report the results of three-dimensional molecular dynamics simulations of sheared granular system in a Couette geometry.\cite{movies} The simulations use realistic boundary conditions that may be expected in physical experiments. For a range of boundary ... More
Parametric model order reduction for large-scale and complex thermal systemsMar 14 2018In this paper, a parametric model order reduction (pMOR) technique is proposed to find a simplified system representation of a large-scale and complex thermal system. The main principle behind this technique is that any change of the physical parameters ... More
Combining Grassmann algebra with entanglement renormalization methodJun 11 2015By combining the Grassmann algebra with multi-scale entanglement renormalization ansatz (MERA), we introduce a new unbiased and effective numerical method for simulating 2D strongly correlated electronic systems. The new GMERA method inherits all the ... More
From nothing to something II: nonlinear systems via consistent correlated bangFeb 13 2017Chinese ancient sage Laozi said everything comes from \emph{\bf \em "nothing"}. \rm In the first letter (Chin. Phys. Lett. 30 (2013) 080202), infinitely many discrete integrable systems have been obtained from "nothing" via simple principles (Dao). In ... More
Alice-Bob systems, $P_s$-$T_d$-$C$ principles and multi-soliton solutionsMar 13 2016Apr 10 2016To describe two-place physical problems, many possible models named Alice-Bob (AB) systems are proposed. To find and to solve these systems, the Parity (P), time reversal (T), charge conjugation (C), shifted-parity ($P_s$, parity with a shift), delayed ... More
Spreading and vanishing in nonlinear diffusion problems with free boundariesJan 23 2013We study nonlinear diffusion problems of the form $u_t=u_{xx}+f(u)$ with free boundaries. Such problems may be used to describe the spreading of a biological or chemical species, with the free boundary representing the expanding front. For special $f(u)$ ... More
Instability of nanometric fluid films on a thermally conductive substrateFeb 01 2016Jun 15 2016We consider thin fluid films placed on thermally conductive substrates and exposed to time-dependent spatially uniform heat source. The evolution of the films is considered within the long-wave framework in the regime such that both fluid/substrate interaction, ... More
Co-Poisson structures on polynomial Hopf algebrasJan 17 2016Apr 06 2017The Hopf dual $H^\circ$ of any Poisson Hopf algebra $H$ is proved to be a co-Poisson Hopf algebra provided $H$ is noetherian. Without noetherian assumption, it is not true in general. There is no nontrivial Poisson Hopf structure on the universal enveloping ... More
Traveling Wave Solutions of Competitive Models with Free BoundariesJul 21 2013We study two systems of reaction diffusion equations with monostable or bistable type of nonlinearity and with free boundaries. These systems are used as multi-species competitive model. For two-species models, we prove the existence of a traveling wave ... More
Structured Learning from Partial AnnotationsJun 27 2012Structured learning is appropriate when predicting structured outputs such as trees, graphs, or sequences. Most prior work requires the training set to consist of complete trees, graphs or sequences. Specifying such detailed ground truth can be tedious ... More
Multi-place nonlocal systemsJan 09 2019Two-place nonlocal systems have attracted many scientists' attentions. In this paper, two-place non-localities are extended to multi-place non-localities. Especially, various two-place and four-place nonlocal nonlinear Schrodinger (NLS) systems and Kadomtsev-Petviashvili ... More
Nonlocal conservation laws and related Bäcklund transformations via reciprocal transformationsFeb 28 2014Jun 08 2014A set of infinitely many nonlocal conservation laws are revealed for (1+1)-dimensional evolution equations. For some special known integrable systems, say, the KdV and Dym equations, it is found that different nonlocal conservation laws can lead to same ... More
Higher dimensional Lax pairs of lower dimensional chaos and turbulence systemsJul 12 2001In this letter, a definition of the higher dimensional Lax pair for a lower dimensional system which may be a chaotic system is given. A special concrete (2+1)-dimensional Lax pair for a general (1+1)-dimensional three order autonomous partial differential ... More
A Predictable Rogue Wave and Generating MechanismsMar 05 2018Feb 08 2019Due to the widely applications in almost all branches of science, high dimensional KP equation is selected as universal model to describe rogue wave phenomenon. A lump is an algebraically localized wave decayed in all space directions and exists in all ... More
Maximum principle for state constrained optimal control problems governed by multisolution p-Laplacian elliptic equations in the absence of convexityJan 09 2019A state constrained optimal control problem governed by a class of multisolution p-Laplacian elliptic equations is studied in this paper. Both the control domain and cost functional considered may be non-convex. Combining the multiplicity and degeneracy ... More
Monotonicity of principal eigenvalue for elliptic operators with incompressible flow: A functional approachSep 17 2017Sep 19 2017We establish the monotonicity of the principal eigenvalue $\lambda_1(A)$, as a function of the advection amplitude $A$, for the elliptic operator $L_{A}=-\mathrm{div}(a(x)\nabla)+A\mathbf{V}\cdot\nabla +c(x)$ with incompressible flow $\mathbf{V}$, subject ... More
Second-Order Necessary Conditions for Optimal Control of Semilinear Elliptic Equations with Leading Term Containing ControlsMar 25 2017An optimal control problem for a semilinear elliptic equation of divergence form is considered. Both the leading term and the semilinear term of the state equation contain the control. The well-known Pontryagin type maximum principle for the optimal controls ... More
The Proof of Alzer's Conjecture on Generalized Logarithmic MeanJan 22 2011In 1987, Alzer posed a conjecture on generalized logarithmic mean, which was introduced by Stolarsky in 1975. To prove Alzer's conjecture, Lou posed a conjecture on generalized inverse harmonic mean in 1995. By proving Lou's conjecture, the paper yields ... More
Robust Mars Atmospheric Entry Integrated Navigation based on Parameter SensitivityJun 16 2015Dec 24 2015This paper presented a robust integrated navigation algorithm based on a special robust desensitized extended Kalman filtering with analytical gain (ADEKF) during the Mars atmospheric entry. The robust ADEKF is designed by minimizing a new function penalized ... More
Fast $L_1$-$L_2$ Minimization via a Proximal OperatorSep 29 2016Oct 13 2016This paper aims to develop new and fast algorithms for recovering a sparse vector from a small number of measurements, which is a fundamental problem in the field of compressive sensing (CS). Currently, CS favors incoherent systems, in which any two measurements ... More
Co-Poisson coalgebra and co-Poisson Hopf algebra structures on $k[x_1,x_2,\cdots,x_d]$Jan 17 2016The Hopf dual $H^\circ$ of any Poisson Hopf algebra $H$ is proved to be a co-Poisson Hopf algebra provided $H$ is noetherian. Without noetherian assumption, it is not true in general. There is no nontrivial Poisson Hopf structure on the universal enveloping ... More
Alice-Bob Physics: Coherent Solutions of Nonlocal KdV SystemsJun 10 2016In natural and social science, many events happened at different space-times may be closely entangled or correlated. Two events, $A$ (Alice) and $B$ (Bob) are defined as correlated if one event is determined by another, say, $B=\hat{f}A$ for suitable ... More
Four switching categories for thin-film and bulk ferroelectricsDec 08 2008We classify the switching kinetics of ferroelectrics including both epitaxial/polycrystalline thin films and single-crystalline/ceramic bulks at various applied fields into four categories, depending on whether the depolarization field and/or the polarization ... More
Statistical switching kinetics in ferroelectricsJul 16 2008By assuming a more realistic nucleation and polarization reversal scenario we build a new statistical switching model for ferroelectrics, which is different from either the Kolmogorov-Avrami-Ishibashi (KAI) model or the Nucleation-Limited-Switching (NLS) ... More
A New Training Algorithm for Kanerva's Sparse Distributed MemoryJul 22 2012Jul 27 2012The Sparse Distributed Memory proposed by Pentii Kanerva (SDM in short) was thought to be a model of human long term memory. The architecture of the SDM permits to store binary patterns and to retrieve them using partially matching patterns. However Kanerva's ... More
Droplet coalescence and breakup: Numerical simulations using moving mesh interface tracking with dynamic mesh adaptationOct 15 2010Droplet(s) breakup and coalescence have been simulated by the finite volume/moving mesh interface tracking method (MMIT) with adaptive mesh refining and coarsening. In this method, the interface is zero-thickness and moves in a Lagrangian fashion. The ... More
Local times of stochastic differential equations driven by fractional Brownian motionsFeb 23 2016In this paper, we study the existence and (H\"older) regularity of local times of stochastic differential equations driven by fractional Brownian motions. In particular, we show that in one dimension and in the rough case H<1/2, the H\"older exponent ... More
Fast L1-L2 minimization via a proximal operatorSep 29 2016May 16 2017This paper aims to develop new and fast algorithms for recovering a sparse vector from a small number of measurements, which is a fundamental problem in the field of compressive sensing (CS). Currently, CS favors incoherent systems, in which any two measurements ... More
Distributed Surrounding Design of Target Region with Complex Adjacency MatricesOct 20 2015This is a complete version of the 6-page IEEE TAC technical note [1]. In this paper, we consider the distributed surrounding of a convex target set by a group of agents with switching communication graphs. We propose a distributed controller to surround ... More
Naming game with learning errors in communicationsDec 18 2014Naming game simulates the process of naming an objective by a population of agents organized in a certain communication network topology. By pair-wise iterative interactions, the population reaches a consensus state asymptotically. In this paper, we study ... More
Cesari-type Conditions for Semilinear Elliptic Equations with Leading Term Containing ControlsDec 05 2010An optimal control problem governed by semilinear elliptic partial differential equations is considered. The equation is in divergence form with the leading term containing controls. By studying the $G$-closure of the leading term, an existence result ... More
Optimal Blowup Time for Controlled Ordinary Differential EquationsNov 18 2013Both the shortest and the longest blowup time for a controlled system are considered. Existence result and maximum principle for optimal triple are established. Thanks to some monotonicity of the controlled system, some kinds of "the front part local ... More
$\partial$-reducible handle additionsOct 23 2018Oct 30 2018Let $M$ be a simple 3-manifold, and $F$ be a component of $\partial M$ of genus at least 2. Let $\alpha$ and $\beta$ be separating slopes on $F$. Let $M(\alpha)$ (resp. $M(\beta)$) be the manifold obtained by adding a 2-handle along $\alpha$ (resp. $\beta$). ... More
Prohibitions caused by nonlocality for Alice-Bob Boussinesq-KdV type systemsJun 20 2018It is found that two different celebrate models, the Korteweg de-Vrise (KdV) equation and the Boussinesq equation, are linked to a same model equation but with different nonlocalities. The model equation is called the Alice-Bob KdV (ABKdV) equation which ... More
Fractal Dimensions of Rough Differential Equations Driven by Fractional Brownian MotionsJan 27 2015Jan 28 2015In this work we study fractal properties of rough differential equations driven by a fractional Brownian motions with Hurst parameter $H>\frac{1}{4}$. In particular, we show that the Hausdorff dimension of the sample paths of the solution is $\min\{d,\frac{1}{H}\}$ ... More
Optimization of the Principal Eigenvalue for Elliptic OperatorsSep 29 2018Maximization and minimization problems of the principle eigenvalue for divergence form elliptic operators with Dirichlet boundary condition are considered. The principal eigen map of elliptic operator is introduced and the continuity as well as the differentiability ... More
Discussion: Conditional growth chartsFeb 22 2007Discussion of Conditional growth charts [math.ST/0702634]
Spin Hall current and two-dimensional magnetic monopole in a Corbino diskJan 13 2005A spin Hall current can circulate in a Corbino disk with spin-orbit interactions in the presence of a radial charge current, without encountering the sample edge problem. We have suggested several experiments to directly detect and manipulate the spin ... More
Alice-Bob Peakon SystemsMay 21 2017In this letter, we study the Alice-Bob peakon system generated from an integrable peakon system through using the strategy of the so-called Alice-Bob non-local KdV approach [13]. Non-local integrable peakon equations are obtained and shown to have peakon ... More
Consistent Riccati Expansion and SolvabilityAug 27 2013Aug 30 2013A consistent Riccati expansion (CRE) is proposed for solving nonlinear systems with the help of a Riccati equation. A system is defined to be CRE solvable if it has a CRE. Various integrable systems are CRE solvable. Furthermore, it is also revealed that ... More
MHD tidal waves on a spinning magnetic compact starOct 19 2004In an X-ray binary system, the companion star feeds the compact neutron star with plasma materials via accretions. The spinning neutron star is likely covered with a thin "magnetized ocean" and may support {\it magnetohydrodynamic (MHD) tidal waves}. ... More
SynonymNet: Multi-context Bilateral Matching for Entity SynonymsDec 31 2018Being able to automatically discover synonymous entities from a large free-text corpus has transformative effects on structured knowledge discovery. Existing works either require structured annotations, or fail to incorporate context information effectively, ... More
Joint Slot Filling and Intent Detection via Capsule Neural NetworksDec 22 2018Being able to recognize words as slots and detect the intent of an utterance has been a keen issue in natural language understanding. The existing works either treat slot filling and intent detection separately in a pipeline manner, or adopt joint models ... More
Missing Movie Synergistic Completion across Multiple Isomeric Online Movie Knowledge LibrariesMay 15 2019Online knowledge libraries refer to the online data warehouses that systematically organize and categorize the knowledge-based information about different kinds of concepts and entities. In the era of big data, the setup of online knowledge libraries ... More
Directional Training and Fast Sector-based Processing Schemes for mmWave ChannelsNov 02 2016Nov 19 2016We consider a single-cell scenario involving a single base station (BS) with a massive array serving multi-antenna terminals in the downlink of a mmWave channel. We present a class of multiuser user MIMO schemes, which rely on uplink training from the ... More
Variational Principles For BS Dimension of SubsetsNov 30 2011We redefine BS-dimension for Caratheodory structure by packing method. We have the same dimension properties with respect to the cover method and check the Bowen's equation for the new dimension as well. Besides, we consider the relation between the new ... More
Zero-shot User Intent Detection via Capsule Neural NetworksSep 02 2018User intent detection plays a critical role in question-answering and dialog systems. Most previous works treat intent detection as a classification problem where utterances are labeled with predefined intents. However, it is labor-intensive and time-consuming ... More
Degrees of Freedom of the 3-User Rank-Deficient MIMO Interference ChannelNov 18 2012Mar 24 2014We provide the degrees of freedom (DoF) characterization for the $3$-user $M_T\times M_R$ multiple-input multiple-output (MIMO) interference channel (IC) with \emph{rank-deficient} channel matrices, where each transmitter is equipped with $M_T$ antennas ... More
Projection Pressure and Bowen's Equation for a Class of Self-similar Fractals with Overlap StructureMar 12 2010Let $\{S_i\}_{i=1}^{l}$ be an iterated function system(IFS) on $\mathbb{R}^d$ with attractor K. Let $\pi$ be the canonical projection. In this paper we define a new concept called "projection pressure" $P_\pi(\phi)$ for $\phi\in C(\mathbb{R}^d)$ under ... More
Finding Similar Medical Questions from Question Answering WebsitesOct 14 2018The past few years have witnessed the flourishing of crowdsourced medical question answering (Q&A) websites. Patients who have medical information demands tend to post questions about their health conditions on these crowdsourced Q&A websites and get ... More
Maximum relative excitation of a specific vibrational mode via optimum laser pulse durationJan 07 2010Oct 01 2010For molecules and materials responding to femtosecond-scale optical laser pulses, we predict maximum relative excitation of a Raman-active vibrational mode with period T when the pulse has an FWHM duration of 0.42 T. This result follows from a general ... More
Long Fading Mid-Infrared Emission in Transient Coronal Line Emitters: Dust Echo of Tidal Disruption FlareMay 17 2016Aug 30 2016The sporadic accretion following the tidal disruption of a star by a supermassive black hole (TDE) leads to a bright UV and soft X-ray flare in the galactic nucleus. The gas and dust surrounding the black hole responses to such a flare with an echo in ... More
Long Fading Mid-Infrared Emission in Transient Coronal Line Emitters: Dust Echo of Tidal Disruption FlareMay 17 2016Dec 01 2016The sporadic accretion following the tidal disruption of a star by a super-massive black hole (TDE) leads to a bright UV and soft X-ray flare in the galactic nucleus. The gas and dust surrounding the black hole responses to such a flare with an echo in ... More
Dual-Level Compressed Aggregation: Recovering Fields of Physical Quantities from Incomplete Sensory DataJul 25 2011Jul 30 2011Although wireless sensor networks (WSNs) are powerful in monitoring physical events, the data collected from a WSN are almost always incomplete if the surveyed physical event spreads over a wide area. The reason for this incompleteness is twofold: i) ... More
Fog Massive MIMO: A User-Centric Seamless Hot-Spot ArchitectureMar 20 2018The decoupling of data and control planes, as proposed for 5G networks, will enable the efficient implementation of multitier networks where user equipment (UE) nodes obtain coverage and connectivity through the top-tier macro-cells, and, at the same ... More
Bipolar and unipolar electrical fatigue in ferroelectric lead zirconate titanate thin films: an experimental comparison studyNov 26 2009By performing standard PUND (positive-up-negative-down), hysteresis-loop and dielectric measurements on the ferroelectric lead zirconate titanate (PZT) thin-film capacitors subject to bipolar/unipolar electrical cycling, we show that unipolar fatigue ... More
Beam break-up current limit in multi-turn ERLs and CBETADec 21 2018This paper uses theory and simulation of the Beam Break-Up instability (BBU) for multi-turn ERLs to determine and to optimize the current limit of the Cornell Brookhaven Energy-Recovery-Linac Test Accelerator (CBETA). Currently under construction at Cornell ... More
Helical Quantum States in HgTe Quantum Dots with Inverted Band StructuresOct 20 2010Sep 20 2011We investigate theoretically the electron states in HgTe quantum dots (QDs) with inverted band structures. In sharp contrast to conventional semiconductor quantum dots, the quantum states in the gap of HgTe quantum dot with an inverted band structure ... More