Search results for "QA"

showing 4 items of 1014 documents

Practice for determining friction in hydraulic winch systems

2020

This paper presents a method for estimating friction in hydraulic active heave compensated (AHC) offshore winches. The method is a two-step approach where the first step is to model the friction loss in the hydraulic motors based on data from the sub-supplier. The second step requires real-life testing, where the remaining friction losses in the winch system is identified and modeled. In this context, a practice is characterized by obtaining a friction loss estimation with the highest possible accuracy over the widest possible range of operating conditions with a limited amount of experimental work. The method benefits from the use of parametric models, sub-supplier data, and real-life meas…

winch systemEngineeringbusiness.industrytorque losshydraulicslcsh:QA75.5-76.95Computer Science ApplicationsControl and Systems EngineeringModeling and Simulationlcsh:Electronic computers. Computer scienceoffshore knuckle boom cranesWinchbusinessSoftwareMarine engineeringModeling, Identification and Control: A Norwegian Research Bulletin
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Basic Statistical Indices for SeqAn

2009

z-score SeqAn
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Properties of zeros of solutions to third order nonlinear differential equations

2013

We investigate the behavior of zeros of solutions to the certain type of third order nonlinear differential equations. We show that the behavior of zeros may be rather different and depend on the nature of nonlinearity in the equation. Main results in the paper are illustrated with a number of examples.

zeros of solutionsThird order nonlinearDifferential equationMathematical analysisdependence of zeros on initial dataType (model theory)third order nonlinear differential equationsNonlinear systemModeling and SimulationQA1-939super-linearityAnalysisMathematicssub-linearityMathematicsMathematical Modelling and Analysis
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Some characterisations of groups in which normality is a transitive relation by means of subgroup embedding properties

2018

[EN] In this survey we highlight the relations between some subgroup embedding properties that characterise groups in which normality is a transitive relation in certain universes of groups with some finiteness properties.

‎group without infinite‎ ‎simple sectionsSubgroup&#8206FC&#8727lcsh:Mathematics-Group&#8206‎T-group‎Group Without Infinite&#8206Grups Teoria desubgroup embedding propertieslcsh:QA1-939t-property&#8206‎subgroup‎ ‎embedding property‎‎FC$^*$-group‎Group&#8206Simple Sectionst-property subgroup embedding properties‎group‎Embedding Property&#8206MATEMATICA APLICADAT-Group&#8206
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