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This paper addresses the problem of dynamic clutter mitigation by focusing on the mitigation of the wind turbine clutter from the radar data. The basis pursuit and morphological component analysis approach are used to decompose the radar returns into the sum of oscillatory and transient components.The success of the morphological component analysis rely on sparsity, thus different transform domains needs to be identified correctly to represent each component sparsely. The method is illustrated on a radar data collected from a small custom built radar system to show the success of the proposed algorithm for wind turbine clutter mitigation.

Empirical interaction equations are recommended in various specifications for the design of biaxially bent beam-columns. In this paper, the strength requirements specified in the Canadian Standards Association Standard S16-1969 for the plastic design of biaxially loaded beam-columns are compared with theoretical relations. It is shown that the S16-1969 provisions lead to unduly conservative designs when applied to thin walled square and circular hollow structural sections. Based on the theoretical relations, simplified interaction equations are proposed herein, which are both satisfactory and far less conservative.

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