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In the more advanced vertebrates and invertebrates, many skeletal structures provide a rigid base for the insertion of muscles as well as providing protection.
The semi rigid base for asphalt pavement has been normally considered as typical component of high class highways in the design according to the Chinese experience since 1997.
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Approximate explicit formulae are presented for (i) the fundamental natural frequency of vibration of a uniform hyperboloidal cooling tower shell mounted on a rigid base, and (ii) for the circumferential wavenumber associated with fundamental mode.
The variation of fundamental frequency of chimney with flexible base from that of chimney with rigid base is more for 100 m chimney (H/D b = 7 and D o/t = 22.5) resting on soil type S1 and the variation is 32.26 %.
In addition, beam-to-column bolted connections can contribute 34 88% of the overall frame elastic lateral stiffness for pinned bases and 17 33% for rigid base connections.
In recent years, there has been renewed interest in synthetic aggregate for flexible or rigid base manufactured with coal combustion by-products because of a scarcity of dependable sources of aggregate and high transportation cost.
Gas is therefore the "bridge fuel" for putting a bridge between coal's rigid base load power and the dodgy ways of everyday demand; in the same way, natural gas can lead to a world heavily powered by renewables.
Impedance functions for a rigid massless circular foundation resting on a soil layer underlain by a rigid base subjected to vertical harmonic excitation are found using one-dimensional wave propagation in cones.
The validity and limitations of such approximation are investigated for a rigid-block on rigid-base, utilizing rigorous analytical solutions from the bibliography; and for the frame structure on nonlinear soil, by conducting comprehensive nonlinear dynamic time history analyses.
Sidewinding, which is also used when the locomotor surface fails to provide a rigid frictional base, is a specific adaptation for crawling over friable sandy soils.
This paper investigates the fixed-time attitude tracking control problem for rigid spacecraft based on rotation matrix.
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