Results 11 to 20 of about 9,226,030 (253)

Continued fractions which correspond to two series expansions and the strong Hamburger moment problem [PDF]

open access: yes, 2012
Just as the denominator polynomials of a J-fraction are orthogonal polynomials with respect to some moment functional, the denominator polynomials of an M-fraction are shown to satisfy a skew orthogonality relation with respect to a stronger moment ...
Sri Ranga, A.
core   +2 more sources

Target magnetic moment orientation estimation method based on full magnetic gradient orthonormal basis function

open access: yesAIP Advances, 2022
Magnetic anomaly detection (MAD) is an effective method to detect the existence and localization of magnetic targets. Magnetic signal processing technology can extract target signals from complex background noise.
Yijie Qin   +5 more
doaj   +1 more source

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

Multidimensional moment problem and diagonal Schur algorithm [PDF]

open access: yes
The multidimensional moment problem is studied in terms of the Steiltjes transform. The diagonal step-by-step algorithm is constructed for the multidimensional moment problem.
Kovalyov, Ivan
core   +4 more sources

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

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   +1 more source

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 full infinite dimensional moment problem on semi-algebraic sets of generalized functions

open access: yesJournal of Functional Analysis, 2014
29 pages, Journal of Functional Analysis ...
Infusino M., Kuna T., Rota A.
openaire   +5 more sources

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

Embry truncated complex moment problem [PDF]

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

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