Results 21 to 30 of about 2,931,829 (352)

Fault Diagnosis Algorithm of Beam Pumping Unit Based on Transfer Learning and DenseNet Model

open access: yesApplied Sciences, 2022
The difficulty of collecting fault data samples is one of the application problems of the deep learning method in fault diagnosis of mechanical production; the second is that when the depth of the learning network increases, the network accuracy is ...
Yu Wu   +4 more
doaj   +1 more source

Venn Diagrams May Indicate Erroneous Statistical Reasoning in Transcriptomics [PDF]

open access: yesFrontiers in Genetics, 2022
A common application of differential expression analysis is finding genes that are differentially expressed upon treatment in only one out of several groups of samples. One of the approaches is to test for significant difference in expression between treatment and control separately in the two groups, and then select genes that show statistical ...
Weiner 3rd, January   +2 more
openaire   +3 more sources

Assessing the Suitability of DME for Powering SI Engines by Analyzing In-Cylinder Pressure Change

open access: yesSensors, 2022
This article discusses an analysis of in-cylinder pressure change during combustion of LPG-DME fuel in IC engines. The aim of the study is to present a method for assessing the possibility of using DME as a combustion activator, and to establish its ...
Paweł Fabiś
doaj   +1 more source

Analysis of the application of jet pumps in the field development in Western Siberia

open access: yesИзвестия высших учебных заведений: Нефть и газ, 2020
Currently, the use of jet devices in the oil and gas industry is constantly expanding. The reason for this expansion in the oil and gas industry is the presence of a number of advantages.
G. A. Shlein   +3 more
doaj   +1 more source

Determination of polytropic indicators of schematized working processes of air piston slow-moving long-stroke compressor stages [PDF]

open access: yesОмский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2020
Experimental studies of low-speed long-stroke compressor stages using the example of working fluid — air made it possible to determine such parameters of a schematized working process as polytropes of compression and reverse expansion. These parameters,
V. L. Yusha, S. S. Busarov
doaj   +1 more source

Well Production Real-Time Intelligent Monitoring Based on Convolutional Neural Network

open access: yesImproved Oil and Gas Recovery, 2019
Based on the theory of deep learning, this paper proposes the use of convolution neural network (CNN) method to identify the working condition of pumping unit of an oil well by indicator diagram. The structure and principle of CNN are introduced, and the
Zhen Wang   +4 more
doaj   +1 more source

An evolutional deep learning method based on multi-feature fusion for fault diagnosis in sucker rod pumping system

open access: yesAlexandria Engineering Journal, 2023
As the smart oilfield has grown, various deep learning technologies are being utilized to recognize the graphic feature of the indicator diagram in order to detect the fault type of rod pump system, so as to maintain the oilfield's regular production ...
Juanni Li   +3 more
doaj   +1 more source

An extremal problem for a class of entire functions of exponential type [PDF]

open access: yes, 2008
We find the exact upper estimate for the upper density of zeros of entire functions of exponential type whose indicator diagram is contained in a given interval.Comment: 7 pages, 1 ...
Eremenko, Alexandre, Yuditskii, Peter
core   +6 more sources

Very General Holographic Superconductors and Entanglement Thermodynamics [PDF]

open access: yes, 2014
We construct and analyze holographic superconductors with generalized higher derivative couplings, in single R-charged black hole backgrounds in four and five dimensions.
Dey, Anshuman   +2 more
core   +2 more sources

New distances to RAVE stars [PDF]

open access: yes, 2013
Probability density functions are determined from new stellar parameters for the distance moduli of stars for which the RAdial Velocity Experiment (RAVE) has obtained spectra with S/N>=10.
Bienaymé, O.   +19 more
core   +5 more sources

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