Results 21 to 30 of about 70,591 (246)
Improving the Strapdown Airborne Vector Gravimetry by a Backward Inertial Navigation Algorithm
Sensors, 2018 Strapdown airborne gravimetry is an efficient way to obtain gravity field data. A new method has been developed to improve the accuracy of airborne vector gravimetry.
Minghao Wang +5 more
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Research on Unpowered Trim Ascent Motion Characteristics of Deep-sea Vehicles
水下无人系统学报, 2022 To improve the ascent response speed of unpowered deep-sea vehicles, and meet the requirements of mission loads for its water-exit attitude, considering the effect of ocean currents and buoyancy changes, a space motion simulation model of the vehicle was
Zhi-chao ZHAO +3 more
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PREDOMINANT TRAVELING IONOSPHERIC DISTURBANCES OVER EASTERN EUROPE DURING LOW LEVELS OF SOLAR AND GEOMAGNETIC ACTIVITIES USING INCOHERENT SCATTER RADAR DATA [PDF]
Radio Physics and Radio Astronomy, 2020 Purpose: Detection of wave processes of various temporal and spatial scales in the mid-latitude ionosphere over the Eastern Europe near the characteristic geophysical time periods (equinoxes and solstices) during magnetically quiet and weakly disturbed ...
K. D. Aksonova, S. V. Panasenko
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Vietnam Journal of Mechanics, 2019 The elevator is usually hinged to the horizontal tail, which acts as a balance and controls the altitude, establishes a steady motion for the aircraft at all lift coefficients. During elevator rotating, the aircraft needs to be stable to establish a new
Hoang Thi Bich Ngoc, Bui Vinh Binh
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Energies, 2020 Motion states of bottom hole assembly (BHA) have a great effect on the trajectory control and drilling efficiency while rotary drilling. In order to study the motion states of BHA in horizontal wells, a BHA dynamic model with the finite element method ...
Wei Li +4 more
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The Transition to Superrotation in Terrestrial Atmospheres [PDF]
, 2010 We show that by changing a single non-dimensional number, the thermal Rossby number, global atmospheric simulations with only axisymmetric forcing pass from an Earth-like atmosphere to a superrotating atmosphere that more resembles the atmospheres of ...
Del Genio +33 more
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Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2023 Background. Volcanoes belong to high-energy sources capable of causing significant disturbances in all subsystems of the Earth – atmosphere – ionosphere – magnetosphere (EAIM) system.
L. F. Chernogor +2 more
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Gravity-driven flow of continuous thin liquid films on non-porous substrates with topography [PDF]
, 2004 A range of two- and three-dimensional problems is explored featuring the gravity-driven flow of a continuous thin liquid film over a non-porous inclined flat surface containing well-defined topography.
Gaskell, P.H. +4 more
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Robust hovering control of a quad tilt-wing UAV [PDF]
, 2010 This paper presents design of a robust hovering controller for a quad tilt-wing UAV to hover at a desired position under external wind and aerodynamic disturbances. Wind and the aerodynamic disturbances are modeled using the Dryden model.
Cetinsoy, Ertugrul +9 more
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Numerical modelling of the thermospheric and ionospheric effects of magnetospheric processes in the cusp region [PDF]
Annales Geophysicae, 1996 The thermospheric and ionospheric effects of the precipitating electron flux and field-aligned-current variations in the cusp have been modelled by the use of a new version of the global numerical model of the Earth's upper atmosphere developed for ...
A. A. Namgaladze +3 more
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