4,402 research outputs found
A Hybrid Quantum Encoding Algorithm of Vector Quantization for Image Compression
Many classical encoding algorithms of Vector Quantization (VQ) of image
compression that can obtain global optimal solution have computational
complexity O(N). A pure quantum VQ encoding algorithm with probability of
success near 100% has been proposed, that performs operations 45sqrt(N) times
approximately. In this paper, a hybrid quantum VQ encoding algorithm between
classical method and quantum algorithm is presented. The number of its
operations is less than sqrt(N) for most images, and it is more efficient than
the pure quantum algorithm.
Key Words: Vector Quantization, Grover's Algorithm, Image Compression,
Quantum AlgorithmComment: Modify on June 21. 10pages, 3 figure
A Novel Spatio-Temporal Data Storage and Index Method for ARM-Based Hadoop Server
This project is supported by Science and Technology Development Plan of Jilin Province (20140204010SF) and Chinese National Natural Science Foundation (61472159). WP is supported by the PECE bursary from The Scottish Informatics and Computer Science Alliance (SICSA).Postprin
Goods Consumed during Transit in Split Delivery Vehicle Routing Problems: Modeling and Solution
Deep learning assisted jet tomography for the study of Mach cones in QGP
Mach cones are expected to form in the expanding quark-gluon plasma (QGP)
when energetic quarks and gluons (called jets) traverse the hot medium at a
velocity faster than the speed of sound in high-energy heavy-ion collisions.
The shape of the Mach cone and the associated diffusion wake are sensitive to
the initial jet production location and the jet propagation direction relative
to the radial flow because of the distortion by the collective expansion of the
QGP and large density gradient. The shape of jet-induced Mach cones and their
distortions in heavy-ion collisions provide a unique and direct probe of the
dynamical evolution and the equation of state of QGP. However, it is difficult
to identify the Mach cone and the diffusion wake in current experimental
measurements of final hadron distributions because they are averaged over all
possible initial jet production locations and propagation directions. To
overcome this difficulty, we develop a deep learning assisted jet tomography
which uses the full information of the final hadrons from jets to localize the
initial jet production positions. This method can help to constrain the initial
regions of jet production in heavy-ion collisions and enable a differential
study of Mach-cones with different jet path length and orientation relative to
the radial flow of the QGP in heavy-ion collisions
Design and Development of the Reactive BGP peering in Software-Defined Routing Exchanges
The Software-Defined Networking (SDN) is considered to be an improved solution for applying flexible control and operation recently in the network. Its characteristics include centralized management, global view, as well as fast adjustment and adaptation. Many experimental and research networks have already migrated to the SDN-enabled architecture. As the global network continues to grow in a fast pace, how to use SDN to improve the networking fields becomes a popular topic in research. One of the interesting topics is to enable routing exchanges among the SDN-enabled network and production networks. However, considering that many production networks are still operated on legacy architecture, the enabled SDN routing functionalities have to support hybrid mode in operation. In this paper, we propose a routing exchange mechanism by enabling reactive BGP peering actions among the SDN and legacy network components. The results of experiments show that our SDN controller is able to mask as an Autonomous System (AS) to exchange routing information with other BGP routers
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