Results 31 to 40 of about 4,167,463 (302)

Characterizations of Swept Shock/Boundary Layer Interactions: A Comparison Between Planar Shock, Curved Shock, and Isentropic Compression

open access: yesAerospace
To investigate the flow characteristics of three-dimensional swept interactions, 3D steady Reynolds-averaged Navier–Stokes (RANS) simulations are conducted at an incoming Mach number of 3.5 and a Reynolds number of 30,955 based on the incoming boundary ...
Fajia Sheng   +5 more
doaj   +1 more source

Combustion characteristics of hydrogen direct injection in a helium–oxygen compression ignition engine

open access: yesEnergy Reports, 2022
The ignition of hydrogen in compression ignition (CI) engines by adding noble gas as a working gas can yield excellent thermal efficiency due to its high specific heat ratio.
Norhidayah Mat Taib   +2 more
doaj   +1 more source

Efficient Compression in Semigroups

open access: yesCoRR
Straight-line programs are a central tool in several areas of computer science, including data compression, algebraic complexity theory, and the algorithmic solution of algebraic equations. In the algebraic setting, where straight-line programs can be interpreted as circuits over algebraic structures such as semigroups or groups, they have led to deep ...
Thumm, Alexander, Weiß, Armin
openaire   +3 more sources

Efficient Compression and Indexing of Trajectories [PDF]

open access: yes, 2017
This research has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sk{\l}odowska-Curie Actions H2020-MSCA-RISE-2015 BIRDS GA No ...
Nieves R. Brisaboa   +4 more
openaire   +5 more sources

On the efficiency of caloric materials in direct comparison with exergetic grades of compressors

open access: yesJPhys Energy, 2023
Efficiency improvements in heat pump can drastically reduce global energy demand. Caloric heat pumps are currently being investigated as a potentially more efficient alternative to vapor compression systems.
Jan Schipper   +9 more
doaj   +1 more source

Value Compression for Efficient Computation [PDF]

open access: yes, 2005
A processor's energy consumption can be reduced by compressing values (data and addresses) that flow through a processor pipeline and gating off portions of data path elements that would otherwise be used for computing non-significant bits. An approach for compressing all values running through a processor is proposed and evaluated. For the SpecInt2000
Ramon Canal   +2 more
openaire   +2 more sources

Efficient Fully-Compressed Sequence Representations [PDF]

open access: yesAlgorithmica, 2012
We present a data structure that stores a sequence $s[1..n]$ over alphabet $[1..σ]$ in $n\Ho(s) + o(n)(\Ho(s){+}1)$ bits, where $\Ho(s)$ is the zero-order entropy of $s$. This structure supports the queries \access, \rank\ and \select, which are fundamental building blocks for many other compressed data structures, in worst-case time $\Oh{\lg\lgσ}$ and
Jérémy Barbay   +4 more
openaire   +10 more sources

Color Transformations Resulting in Loss of Performance in Modern Video Compression Software Systems

open access: yesInformation
Modern video compression is implemented in complex software systems that reuse software modules from various sources. This is particularly evident in experimental software systems designed for researching and standardizing new compression technologies ...
Marek Domański   +2 more
doaj   +1 more source

Efficient Compression of Web Graphs

open access: yesIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2008
Several methods have been proposed for compressing the linkage data of a Web graph. Among them, the method proposed by Boldi and Vigna is known as the most efficient one. In the paper, we propose a new method to compress a Web graph. Our method is more efficient than theirs with respect to the size of the compressed data.
ASANO, Yasuhito   +2 more
openaire   +2 more sources

A Complexity Reduction Scheme for Depth Coding in 3D-HEVC

open access: yesInformation, 2019
3D-high efficiency video coding (3D-HEVC) is the next-generation compression standard for multiview system applications, which has recently been approved by MPEG and VCEG as an extension of HEVC.
Qiuwen Zhang   +4 more
doaj   +1 more source

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