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But America's air force continued to experiment, converting a small jet-powered target drone, the Firebee, into an unmanned spy plane called the Lightning Bug.

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Distinguishing methods of various zero members i n special node s are summarized as well as the method how to utilize the symmetry of structure to build local coordinate system correctly for simplified internal force calculation of plane truss.

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Reissner topic,which thinks fracture plane behind retaining wall is made up of a logarithmic spiral and a straight line,and by using limit equilibrium and constrained optimization,the formulas of active earth pressure,the resultant force of earth pressure and its application point are obtained.

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The effect is that of a force, perpendicular to the plane, acting on the magnetic pole.

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Using the powerful calculation capability of MATLAB for matrix,and adopting vector ring and vector chain equation,the paper calculates and imitates the characteristic of kinematics and kinetics about equivalent force model of plane machinery.

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Therefore, the possibility that the film flow was in onflow state was very low under the fisher swing frequency even though the swing affixation force acted on the film. In falling film absorption process, the velocity, temperature and concentration distribution of the liquid film was symmetry on the swing plane basically.

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In the investigation of micromagnetism, in-plane magnetoresistance and in-field magnetic force microscopy on a series of permalloy planar wires were performed. Here, the wire length and thickness are kept constant, 20μm and 30nm, respectively. The width of the wire spans from 10 to 0.1μm. The magneto-transport behavior and magnetic configuration are quite different regarding their widths, corresponding to the aspect ratio.

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