An identification procedure of nonlinear unitfeedback system is investigated by means of operator notation and Fourier transform, and some formulas for identification are given.
用算子符方法及傅里叶变换研究了单位反馈线性系统的一种辨识方法，并给出了辨识算式。
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This is why we use good design practices and automated feedback loops like unit or system tests; to keep things easy to change.
Upon completing the code and the unit tests, the developer assembled a review package for the peer review process (described later) and awaited feedback.