The measurement of antomlbile emissions become more and more important due the completing of the legislation The study on the gas constant volume sample (CFV-CVS)is reported in this paper.

Perturbation of Frames, Sampling Theorems and Duality of Frames;

In this paper,we first introduce the principle of the measuring apparatus and then analyzes the problem of data sampling in measuring process with the sampling theorem.

The Walter s sampling theorem for the wavelet subspace in the three-band case is used to reconstruct the signal quickly and accurately on the multiresolution space without any truncated errors.

Based on sampling theory, a new visual clustering algorithm was proposed.

Starting from the basic principle of memory,we carry out the theoretical studies according to the sampling theory,summarize out the functions of function transformation of the memory,put forward the idea of using the DDS method to design the function generator.

The system is based on Computer Control, the PID control and the FUZZY control can be realized in it,the correlative hardware and the interface technology, the collection and feedback of data, the theory of the system and Timing sampling ,and the control algorithms(PID and FUZZY) and the rule of FUZZY control all be introduced here,the experimental results are inclouded.