Results 11 to 20 of about 113,963 (160)

The full infinite dimensional moment problem on semi-algebraic sets of generalized functions [PDF]

open access: yesJournal of Functional Analysis, 2014
29 pages, Journal of Functional Analysis ...
Infusino M., Kuna T., Rota A.
core   +7 more sources

Complete shaking force and shaking moment balancing of spatial multibody systems with open kinematic chains [PDF]

open access: yesVietnam Journal of Mechanics, 2005
This paper deals with a solution for the problem of full shaking force and shaking moment balancing of spatial multi body systems with open kinematic chains. Firstly, the general conditions for complete dynamic balancing of spatial multibody systems are
Nguyen Van Khang   +2 more
doaj   +2 more sources

Attitude Stabilization of a Satellite Having Only Electromagnetic Actuation Using Oscillating Controls

open access: yesAerospace, 2022
We consider the problem of attitude stabilization for a low Earth orbit satellite having only electromagnetic actuation. Such a satellite is not fully actuated, as the control torque is the cross-product of magnetic moment due to magnetorquers and the ...
Rahul Misra   +2 more
doaj   +1 more source

Resolution of the finite Markov moment problem [PDF]

open access: yes, 2005
International audienceWe expose in full detail a constructive procedure to invert the so--called ``finite Markov moment problem".
Olof Runborg   +5 more
core   +1 more source

Embry truncated complex moment problem

open access: yes, 2003
Let T be a cyclic subnormal operator on a Hilbert space H with cyclic vector x0 and let γij:=(T*iTjx0,x0), for any i,j∈N∪{0}. The Bram–Halmos’ characterization for subnormality of T involved a moment matrix M(n).
Li, Chunji   +3 more
core   +2 more sources

Observer Design for a Variable Moment of Inertia System

open access: yesEnergies, 2021
Variable moment of inertia systems are common, and a popular laboratory system of this type is the “ball-and-beam”. Such systems are, however, nonlinear and often unstable. Efficient control requires full state information (or at least partial velocities)
Jerzy Baranowski
doaj   +1 more source

The analysis of medium-sized arrays of complex elements using a combination of FDTD and reaction matching [PDF]

open access: yes, 1999
The analysis of medium-sized arrays of complex antenna elements by means of a full-wave technique often requires impractical amounts of computer power. Nevertheless, it is essential that all the mutual couplings between elements are taken into account. A
Railton, CJ   +3 more
core   +1 more source

Comparative study on the mechanical mechanism of confined concrete supporting arches in underground engineering. [PDF]

open access: yesPLoS ONE, 2018
In order to solve the supporting problem in underground engineering with high stress, square steel confined concrete (SQCC) supporting method is adopted to enhance the control on surrounding rocks, and the control effect is remarkable.
Zhijin Lv   +4 more
doaj   +1 more source

A Gimballed Control Moment Gyroscope Cluster Design for Spacecraft Attitude Control

open access: yesAerospace, 2021
This paper addresses the problem of singularity avoidance in a cluster of four Single-Gimbal Control Moment Gyroscopes (SGCMGs) in a pyramid configuration when used for the attitude control of a satellite by introducing a new gimballed control moment ...
Charalampos Papakonstantinou   +2 more
doaj   +1 more source

Data for indirect load case estimation of ice-induced moments from shaft line torque measurements

open access: yesData in Brief, 2018
During ice navigation, blade measurements of ice-induced moments on ship propellers, are challenged by the harsh operating environment. To overcome this problem, shaft line measurements are performed inboard, and the required propeller loads are ...
R.J.O. de Waal, A. Bekker, P.S. Heyns
doaj   +1 more source

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