A new method for laboratory proficiency test with serial certified reference material as test samples was discussed to define the degree of deviation as performance assessment, marked with p, p=(test result-reference value)/reference uncertainty.

The review is the study on index for formulation optimization of sustained or controlled released dosege forms in China since 1999,including the application of similarity factor and deviation.

This paper presents the deviation as a standard of identity to evaluate the measured results by multi sensors of the same kind from the whole measure scope, and gives a calculation example for this method.

Based on the Gaussian pulse component analysis,a new deviation of laser pulse system in time-domain is defined,and its validity is further verified experimentally.

There are many indices to check whether real state market Bubble exists, which includes: Deviation Degree bet.

The analysis of system and practice show that the open loop total amplification of the control system where the controlled variables are computed by the model will change because calculation module is introduced into the feedback loop,therefore system stability is influenced,the variability of control increases and the quality of control system will deteriorate.