Interface solitons in quadratically nonlinear photonic lattices (2009)
Xu, Zhiyong, Molina, Mario I., Kivshar, Yuri S.
We study the properties of two-color nonlinear localized modes which may exist at the interfaces separating two different periodic photonic lattices in quadratic media, focussing on the impact of...
Spatial-Spectral Vortex Solitons in Quadratic Lattices (2009)
Xu, Zhiyong, Sukhorukov, Andrey A.
We predict the existence of spatial-spectral vortex solitons in one-dimensional periodic waveguide arrays with quadratic nonlinear response. In such vortices the energy flow forms a closed loop...
Jihua ZHENG, Weimin ZHANG, Hai CHEN, Zhiyong XU, Juan ZHOU, Bo XIE, ...
Background and objective There is still no standard regiment for the treatment of advanced elderly patients with non-small cell lung cancer (NSCLC). The aim of this study is to explore the best...
Vector vortex solitons in nematic liquid crystals (2008)
Xu, Zhiyong, Smyth, Noel F., Minzoni, Antonmaria A., Kivshar, Yuri S.
We analyze the existence and stability of two-component vector solitons in nematic liquid crystals for which one of the components carries angular momentum and describes a vortex beam. We demonstrate...
Nonlinear photonic crystals near the supercollimation point (2008)
Xu, Zhiyong, Maes, Bjorn, Jiang, Xunya, Joannopoulos, John D., Torner, Lluis, Soljacic, Marin
We uncover a strong coupling between nonlinearity and diffraction in a photonic crystal at the supercollimation point. We show this is modeled by a nonlinear diffraction term in a nonlinear...
Rotating surface soliton complexes in annular waveguides (2008)
We address surface soliton complexes formed at the edge of annular guiding structures containing several concentric rings. Such soliton complexes feature a -phase difference between neighboring...
Two-color surface lattice solitons (2008)
We study the properties of surface solitons generated at the edge of a semi-infinite photonic lattice in nonlinear quadratic media, namely two-color surface lattice solitons. We analyze the impact of...
Sintering Metal Nanoparticle Films (2008)
Wang, Howard, Huang, Liwei, Xu, Zhiyong, Xu, Congkang, Composto, Russell J, Yang, Zhihao
We have carried out several measurements in order to understand the process of metal nanoparticle (MNP) film sintering. Small angle neutron scattering has been used to reveal the average diameters of...
Nonlinear photonic crystals near the supercollimation point (2008)
Xu, Zhiyong, Maes, Björn, Jiang, Xunya, Joannopoulos, John D, Torner, Lluis, Soljacic, Marin
Two-color surface lattice solitons (2008)
We study the properties of surface solitons generated at the edge of a semi-infinite photonic lattice in nonlinear quadratic media, namely two-color surface lattice solitons. We analyze the impact of...
All-optical soliton control in photonic lattices (2007)
RESUMEN Los solitones ópticos son paquetes de luz (haces y/o pulsos) que no se dispersan gracias al balance entre difracción/dispersión y no linealidad. Al propagarse e interactuar los unos con...
All-optical soliton control in photonic lattices (2007)
RESUMEN Los solitones ópticos son paquetes de luz (haces y/o pulsos) que no se dispersan gracias al balance entre difracción/dispersión y no linealidad. Al propagarse e interactuar los unos con...
Two-dimensional multi-pole solitons in nonlocal nonlinear media (2006)
Rotschild, Carmel, Xu, Zhiyong, Cohen, Oren, Kartashov, Yaroslav V., Torner, Lluis, Segev, Mordechai
We present the experimental observation of scalar multi-pole solitons in highly nonlocal nonlinear media, including dipole-, tri-pole, quadru-pole, and necklace-type solitons, organized as arrays of...
Xu, Zhiyong, Kartashov, Yaroslav V., Torner, Lluis
We address the impact of asymmetric nonlocal diffusion nonlinearity on the properties of gap solitons supported by photorefractive crystal with an imprinted optical lattice. We reveal how the...
Stabilization of vector soliton complexes in nonlocal nonlinear media (2006)
Xu, Zhiyong, Kartashov, Yaroslav V., Torner, Lluis
We introduce vector soliton complexes in nonlocal Kerr-type nonlinear media. We discover that under proper conditions the combination of nonlocality and vectorial coupling has a remarkable...
Soliton mobility in nonlocal optical lattices (2005)
Xu, Zhiyong, Kartashov, Yaroslav V., Torner, Lluis
We address the impact of nonlocality in the physical features exhibited by solitons supported by Kerr-type nonlinear media with an imprinted optical lattice. We discover that nonlocality of nonlinear...
Upper threshold for stability of multipole-mode solitons in nonlocal nonlinear media (2005)
Xu, Zhiyong, Kartashov, Yaroslav V., Torner, Lluis
We address the stability of multipole-mode solitons in nonlocal Kerr-type nonlinear media. Such solitons comprise several out-of-phase peaks packed together by the forces acting between them. We...
Reconfigurable soliton networks optically-induced by arrays of nondiffracting Bessel beams (2005)
Xu, Zhiyong, Kartashov, Yaroslav V., Torner, Lluis
We address the propagation of solitons in reconfigurable two-dimensional networks induced optically by arrays of nondiffracting Bessel beams in Kerr-type nonlinear media. We show that broad soliton...
Xu, Zhiyong, Kartashov, Yaroslav V., Vysloukh, Victor A., Torner, Lluis
We put forward the concept of reconfigurable structures optically induced by mutually incoherent nondiffracting Bessel beams in Kerr-type nonlinear media. We address collinear couplers and...
Multicolor vortex solitons in two-dimensional photonic lattices (2004)
Xu, Zhiyong, Kartashov, Yaroslav V., Crasovan, Lucian-Cornel, Mihalache, Dumitru, Torner, Lluis
We report on the existence and stability of multicolor lattice vortex solitons constituted by coupled fundamental frequency and second-harmonic waves in optical lattices in quadratic nonlinear media....
Spatiotemporal discrete multicolor solitons (2004)
Xu, Zhiyong, Kartashov, Yaroslav V., Crasovan, Lucian-Cornel, Mihalache, Dumitru, Torner, Lluis
We have found various families of two-dimensional spatiotemporal solitons in quadratically nonlinear waveguide arrays. The families of unstaggered odd, even and twisted stationary solutions are...
An Analysis of Cache Performance of Multimedia Aplications (2004)
Zhiyong Xu, Sohum Sohoni, Rui Min, Yiming Hu
Multimedia applications are fast becoming one of the dominating workloads for modern computer systems. Since these applications normally have large data sets and seem to have little data-reuse, a...
Improving routing and caching performance in DHT based peer-to-peer systems (2003)
Thesis (Ph. D.)--University of Cincinnati, 2003.
IMPROVING ROUTING AND CACHING PERFORMANCE IN DHT BASED PEER-TO-PEER SYSTEMS (2003)
With the exciting successes of file sharing applications such as Napster, Gnutella and Kazza, Peer-to-Peer (P2P) system becomes one of the fastest growing applications on Internet. A P2P system can...
Xu, Zhiyong., OhioLINK Electronic Theses And Dissertations Center.
With the exciting successes of file sharing applications such as Napster, Gnutella and Kazza, Peer-to-Peer (P2P) system becomes one of the fastest growing applications on Internet. A P2P system can...
Improving routing and caching performance in DHT based peer-to-peer systems (2003)
Thesis (Ph. D.)--University of Cincinnati, 2003.
Reducing maintenance overhead in DHT based peer-to-peer algorithms (2003)
Zhiyong Xu, Rui Min, Yiming Hu
DHT based Peer-to-Peer (P2P) algorithms are very promising for their efficient routing performance. However, most commercial P2P systems donot adapt DHT algorithms and still use central facilities or...
Sbarc: A supernode based peer-to-peer file sharing system (2003)
Peer-to-Peer (P2P) system has become one of the hottest research topics, its excellent characteristics of fully decentralized control and self-organizing make it attractive for some particular...
Exploiting spatial locality to improve peer-to-peer system performance,” presented at (2003)
Routing performance is critical for Peer-to-Peer (P2P) systems to achieve high performance. Current routing algorithms concentrate on creating a well organized network architecture to boost routing...
Reducing maintenance overhead in DHT based peer-to-peer algorithms (2003)
Zhiyong Xu, Rui Min, Yiming Hu
DHT based Peer-to-Peer (P2P) algorithms are very promising for their efficient routing performance. However, most commercial P2P systems do not adapt DHT algorithms and still use central facilities...
Achieving Better Load Balance in Distributed Storage System (2002)
Zhiyong Xu, Yingwu Zhu, Rui Min, Yiming Hu
The CPU processing speed and disk capacity are increasing tremendously during the past decade. However, the even faster increasing number of users generates higher requirements for high performance...
A Study of Memory System Performance of Multimedia Applications (2001)
Sohum Sohoni, Rui Min, Zhiyong Xu, Yiming Hu
Multimedia applications are fast becoming one of the domi-nating workloads for modern computer systems. Since these applications normally have large data sets and little data-reuse, many researchers...
A Study of Memory System Performance of Multimedia Applications (2001)
Sohum Sohoni, Zhiyong Xu, Rui Min, Yiming Hu
Multimedia applications are fast becoming one of the dominating workloads for modern computer systems. Since these applications normally have large data sets and little data-reuse, many researchers...
Thesis (Ph. D.)--Michigan Technological University, 1999.
IMPROVING ROUTING AND CACHING PERFORMANCE IN DHT BASED PEER-TO-PEER SYSTEMS
With the exciting successes of file sharing applications such as Napster, Gnutella and Kazza, Peer-to-Peer (P2P) system becomes one of the fastest growing applications on Internet. A P2P system can...
Worst-case analysis for flow shop scheduling with a learning effect
Xu, Zhiyong, Sun, Linyan, Gong, Juntao
We consider flow shop scheduling problems with a learning effect. In this model the processing times of jobs are defined as functions of their positions in a permutation. The objective is to minimize...
Li, Yongqiang, Li, Gang, Sun, Linyan, Xu, Zhiyong
This paper investigates a single machine scheduling problem with deteriorating jobs. By a deteriorating job, we mean that the processing time is an increasing function of its execution starting time....