Results 231 to 240 of about 880,319 (258)
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Precession–nutation correction for star tracker attitude measurement of STECE satellite [PDF]
Chinese Journal of Aeronautics, 2014 Space Technology Experiment and Climate Exploration (STECE) is a small satellite mission of China for space technology experiment and climate exploration.
Defeng Gu, Dongyun Yi, Junhong Liu
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AIP Conference Proceedings, 2020
Interaction of elongated steel cylindrical strikers with concrete barriers at a velocity of 1000 m/s is studied numerically. The problem is solved by the finite element method, in a three-dimensional formulation within the framework of the phenomenological approach to the mechanics of a deformable solid using the author's software package EFES.
P. Radchenko, S. Batuev, A. Radchenko
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Interaction of elongated steel cylindrical strikers with concrete barriers at a velocity of 1000 m/s is studied numerically. The problem is solved by the finite element method, in a three-dimensional formulation within the framework of the phenomenological approach to the mechanics of a deformable solid using the author's software package EFES.
P. Radchenko, S. Batuev, A. Radchenko
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Research on measurement of flying object nutation angle based on double linear CCD intersection
SPIE Proceedings, 2012The importance of space scale matching of flying direction and object long axis is presented when we measure nutation angle of flying object with slit photography, and a new method to measure nutation angle of flying object combined slit photography and double linear CCD intersection is examined.
Weihong Ma, Qiuhong Pang, Jinping Ni
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European Journal of Mechanics - B/Fluids, 2003
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Magnetic Resonance in Medicine, 2010
AbstractThe aim of this work was to establish a new, fast, and robust method of flip‐angle calibration for magnetic resonance imaging of hyperpolarized 3He. The method called flip‐angle measurement with magnetization inversion is based on acquiring images from periodically inverted longitudinal magnetization created using the spatial modulation of ...
J, Rivoire +5 more
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AbstractThe aim of this work was to establish a new, fast, and robust method of flip‐angle calibration for magnetic resonance imaging of hyperpolarized 3He. The method called flip‐angle measurement with magnetization inversion is based on acquiring images from periodically inverted longitudinal magnetization created using the spatial modulation of ...
J, Rivoire +5 more
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Chemical Physics Letters, 1988
Abstract Application of magic angle spinning of small spherical volumes of powder samples at high magnetic field strength B 0 , high power rf irradiation, and careful data processing including resolution enhancement leads to highly resolved two-dimensional 23 Na nutation NMR spectra of aluminosilicate sodalites containing different enclathrated ...
G. Engelhardt +3 more
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Abstract Application of magic angle spinning of small spherical volumes of powder samples at high magnetic field strength B 0 , high power rf irradiation, and careful data processing including resolution enhancement leads to highly resolved two-dimensional 23 Na nutation NMR spectra of aluminosilicate sodalites containing different enclathrated ...
G. Engelhardt +3 more
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Journal of the Physical Society of Japan, 1985
We have examined the effect of magnetic dipolar interaction on the transient nutation in a multi-level NMR system with unequal level spacings. Theoretical analysis shows that, unlike the case of pure Zeeman level systems where level spacings are equal, no magic-angle condition exists and the nutation decay becomes faster monotonously with increasing ...
Hiroshi Hatanaka +2 more
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We have examined the effect of magnetic dipolar interaction on the transient nutation in a multi-level NMR system with unequal level spacings. Theoretical analysis shows that, unlike the case of pure Zeeman level systems where level spacings are equal, no magic-angle condition exists and the nutation decay becomes faster monotonously with increasing ...
Hiroshi Hatanaka +2 more
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The resonance motions of a statically stable Lagrange top at small nutation angles
Journal of Applied Mathematics and Mechanics, 2016zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Chemical Physics Letters, 1991
Abstract 1 H 27 Al cross-polarization magic-angle spinning (PC/MAS) NMR has been used to monitor selectively the non-framework aluminium (Al NF ) species in dealuminated zeolite Y (Si/Al=4.0–14). 27 Al quadrupole nutation with fast (12.5 kHz) MAS and radiofrequency excitation fields up to 220 kHz reveals resonances of 0, 30, 56 and 62 ppm, all of ...
João Rocha +2 more
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Abstract 1 H 27 Al cross-polarization magic-angle spinning (PC/MAS) NMR has been used to monitor selectively the non-framework aluminium (Al NF ) species in dealuminated zeolite Y (Si/Al=4.0–14). 27 Al quadrupole nutation with fast (12.5 kHz) MAS and radiofrequency excitation fields up to 220 kHz reveals resonances of 0, 30, 56 and 62 ppm, all of ...
João Rocha +2 more
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