Results 11 to 20 of about 205,624 (165)

COMPRESSION OF NOISY GRAYSCALE IMAGES WITH COMPRESSION RATIO ANALYSIS

open access: yesСучасні інформаційні системи
The object of the study is the process of compressing noisy images in a lossy manner by better portable graphics (BPG) encoder. The subject of the study is the method for adaptive selection of the coder parameter Q depending on noise intensity and image
Sergii Kryvenko   +3 more
doaj   +5 more sources

Synchrotron radiation X-ray diffraction analysis of pyrophyllite under high-pressure

open access: yes矿业科学学报, 2019
High-pressure synchrotron radiation X-ray diffraction experiment on pyrophyllite powders of Mentougou in Bejing were carried out.It was found that the (002) peak of pyrophyllite was diminished when pressure up to 15 GPa,the layered orderly stacking ...
Deng Wenli   +4 more
doaj   +1 more source

PCBMS: A Model to Select an Optimal Lossless Image Compression Technique

open access: yesIEEE Access, 2021
This article presents a parameter combination-based method selection (PCBMS) approach to select an optimal lossless data compression technique and provides an analysis based on experimental results to show its effectiveness.
Md. Atiqur Rahman, Mohamed Hamada
doaj   +1 more source

Improving the Efficiency of Spark-Ignition Internal Combustion Engine Using a Novel Electromagnetic Actuator and Adapting Increased Compression

open access: yesEnergies, 2023
This paper presents an empirical study of a spark-ignition internal combustion engine with modifications made to increase its effectiveness. The modification was implemented bi-directionally in terms of changes to the compression ratio and changes to the
Jarosław Mamala   +4 more
doaj   +1 more source

Image compression system with an optimisation of compression ratio

open access: yesIET Image Processing, 2019
The fundamental goal of image data compression is to set an optimal compression ratio while maintaining an acceptable reproduction quality. This study describes the principles of design of image compression system that automatically sets an optimal compression ratio for particular image content by identifying the image compression method while ...
Adil Amirjanov, Kamil Dimililer
openaire   +1 more source

THE OPTIMUM OVERALL PRESSURE RATIO OF THE INTERCOOLED GAS TURBINE UNIT

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2017
In the article developed a mathematical model expansion and contraction of a real gas. Article shows the relationship between the isentropic efficiency of the compressor and the isentropic efficiency of the compressor stages. It was proved the need for a
N. G. Khasanov, A. B. Shigapov
doaj   +1 more source

Compression Index and Compression Ratio Prediction by Artificial Neural Networks

open access: yesJournal of Engineering, 2017
Information about soil consolidation is essential in geotechnical design. Because of the time and expense involved in performing consolidation tests, equations are required to estimate compression index from soil index properties. Although many empirical
Abbas Jawad Al-Taie, Ass. Prof. Dr.   +2 more
doaj   +2 more sources

Combustion duration influence on hydrogen-ethanol dual fueled engine emissions: An experimental analysis

open access: yesJournal of Mechatronics, Electrical Power, and Vehicular Technology, 2018
The research presented in this article expresses experimental results on combustion duration effect on the dual fueled engine. In particular, the research was focused on the emissions occurred specifically from a hydrogen-ethanol dual fueled engine. This
Syed Yousufuddin
doaj   +1 more source

Numerical simulation of pipe pile composite foundation of deep soft foundation under embankment

open access: yesShuili Shuiyun Gongcheng Xuebao, 2018
Combined with the in-situ test results of the piled embankment with deep soft foundation at the bridge-head of expressway, several axisymmetric finite element numerical modeling methods for single pipe pile in composite foundation are compared and ...
JIANG Yanbin   +4 more
doaj   +1 more source

Knock combustion characteristics of an opposed‐piston two‐stroke gasoline engine

open access: yesEnergy Science & Engineering, 2022
The spark plug of an opposed‐piston two‐stroke (OP2S) gasoline engine is arranged on the side wall of the cylinder liner, far from the center of the combustion chamber; the ignition core of the mixture is offset, the flame propagation distance is ...
Fukang Ma, Jianwei Zhang, Fang Wang
doaj   +1 more source

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