Research on fast marking method for indicator diagram of pumping well based on K-means clustering [PDF]
Heliyon, 2023 Indicator diagram is the key basis for fault diagnosis of pumping wells in oil exploitation. With the rapid development of machine learning, the fault diagnosis of indicator diagram based on deep learning has garnered increasing attention.
Xiang Wang +3 more
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Indicator diagram analysis based on deep learning [PDF]
Frontiers in Earth Science, 2022 At present, more than 90% of China’s oil production equipment comprises rod pump production systems. Indicator diagram analysis of the pumping unit is not only an effective method for monitoring the current working condition of a rod pump production ...
Wenbin Cai +6 more
doaj +4 more sources
Modeling the Influence of Engine Dynamics on Its Indicator Diagram [PDF]
Sensors, 2021 This article presents a proposal to describe the pressure changes in the combustion chamber of an engine as a function of the angle of rotation of the crankshaft, taking into account changes in rotational speed resulting from acceleration. The aim of the
Piotr Deuszkiewicz +2 more
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Research on the Soft-Sensing Method of Indicator Diagram of Beam Pumping Unit [PDF]
SensorsAn accurate calculation of the indicator diagram of a pumping unit is the key factor in analyzing the performance of an oilfield production and operation and in preparing and optimizing an oilfield development plan.
Huaijun Zhao +5 more
doaj +3 more sources
A quantitative indicator diagram for lytic polysaccharide monooxygenases reveals the role of aromatic surface residues in HjLPMO9A regioselectivity. [PDF]
PLoS One, 2017 Lytic polysaccharide monooxygenases (LPMOs) have changed our understanding of lignocellulosic degradation dramatically over the last years. These metalloproteins catalyze oxidative cleavage of recalcitrant polysaccharides and can act on the C1 and/or C4 ...
Danneels B +6 more
europepmc +4 more sources
The Investigation of Two-Phase Expansion Performance with Indicator Diagram in a Twin-Screw Expander [PDF]
Processes, 2023 Volumetric expanders are proven to be more suitable for small-scale waste heat recovery applications because of their simplicity, reliability, lower rotational speed and lower cost.
Yang Ma, Y. Zhou, Zhenkun Zhu
semanticscholar +2 more sources
Analysis and experimental study of oil well indicator diagram based on electric parameter method
Energy Reports, 2022 At present, the load diagram of pumping wells mostly uses load sensors to obtain load data. However, the load sensor is prone to mechanical fatigue during the measurement process, which results in measurement data drift distortion and large errors.
Xiaoju Yin +5 more
doaj +2 more sources
Identification of Indicator Diagram Type in the Oil Well by BP Neural Network
, 2021 Wax sticking in oil wells has always been a difficult problem in oil exploitation. Wax sticking in oil wells exists not only in the exploitation stage, but also in every link of oil production.
Jianxun Jiang, Xiaofang Li
semanticscholar +2 more sources
Computer program for indicator diagram processing of the internal combustion engine
IOP Conference Series: Materials Science and Engineering, 2020 The article presents computer program for processing an indicator diagram of internal combustion engines developed by the author. The program input data are engine construction and operating parameters and cylinder pressure data array.
E. Dimitrov
semanticscholar +2 more sources
Forecasting Financial Extremes: A Network Degree Measure of Super-Exponential Growth. [PDF]
PLoS ONE, 2015 Investors in stock market are usually greedy during bull markets and scared during bear markets. The greed or fear spreads across investors quickly. This is known as the herding effect, and often leads to a fast movement of stock prices.
Wanfeng Yan +1 more
doaj +4 more sources