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Invited article: Electric solar wind sail: toward test missions.

The electric solar wind sail (E-sail) is a space propulsion concept that uses the natural solar wind dynamic pressure for producing spacecraft thrust. In its baseline form, the E-sail consists of a number of long, thin, conducting, and centrifugally stretched tethers, which are kept in a high positive potential by an onboard electron gun. The concept gains its efficiency from the fact that the ...

Application of Wide Band AE Sensor in Model Test of Reinforced Concrete Structures

Due to the complicated components of the reinforced concrete, the AE signals produced by the structural model under different loads possess their different characteristics in the time domain and frequency domain. This paper introduces the application of the Model AE-011 Acoustic Emission Test System with its wide band AE sensors to acquire and process the AE signals emitted from the reinforced ...

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