On the base of analyzing convention digit PLL of frequency shifting feedback in detail, the digit PLL indirect frequency synthesizer of low phase noise including multiple phase feedback, double feedback and phase noise elimination are provided, theory analysis and discussion are given in detail in this paper.

Online composite shape recognition based on relevance feedback;

Audio clip retrieval and relevance feedback based on the audio representation of fuzzy clustering;

Support vector machine based relevance feedback algorithm in image retrieval;

So,the design of the phase feedback controller will decide whether the system works properly.

Thus,this paper proposes a method which can eliminate phase mismatch by phase feedback and achieves well results in practical application.

In order to improve the problem of phase imbalance in 400Hz three-phase combined inverter,in this paper a novel multiple-loop control strategy based on the phase feedback is presented.

The paper proposes a Bayes-based relevant feedback approach by integrating visual features and semantics to effectively make use of semantics and visual features in content-based image retrieval systems.

This paper introduces the features of theCBIR, discusses on the various feature-extraction technologies, and expounds the contents of relevant feedback and performance evaluation.

Aimed at presenting objectively the perspectives of users in the system of image retrieval,an image retrieval method of relevant feedback based on rough set and genetic algorithms is proposed.