Projected gradient methods for Non-negative Matrix Factorization based relevance feedback algorithm in medical image retrieval
Under ideal condition,multi-cyclostationary signals,which are overlapped in the time-frequency domain,can preserve the distinct characteristic without disturbance in cyclic-frequency domain.Unfortunately,in practical application where getting the infinite data length is impossible,the estimation of the cyclic correlation function of the noise and the signal component is not zero due to the limited data length.Accordingly,the performance of cyclostationary method may be negatively affected.In this paper,the quantitative relation between the cyclic correlation function of the noise,the interesting signal,the interference signal and its available data length is deduced,and some conclusions useful for the practical signal processing of cyclostationary signals are obtained,which are further verified by several simulations.
Systematic reflection on practice remains a vexed issue for many nurses and the context of a busy hospital environment poses a challenge. As a process to meet this challenge, Grand Rounds is worth considering. Medical practitioners have used this case study-based process over many years almost as a cultural ritual (Myint & Sabanathan, 2005: 297; Wolak, Cairns & Smith, 2008: 176). The format allows exploration of broad topics related to patient care through facilitated discussion with peers (Wolak et al., 2008 p 173). This paper shares how this format was used to encourage ongoing reflective practice, and foster clinical reasoning amongst nurses at The Maitland Hospital.