Algorithmic complexity, fluctuation complexity and Shannon entropy of the pressure fluctuation time series are employed as the fused characteristic parameters to carry out multi-parameter fusion.

The inference from Shannon formula that the continuous channel with no noise possesses infinite channel capacity is analysed, and it is shown that the inference is inconsistent with the derivation of Shannon formula , and that the definition of Shannon differential entropy is inperfect , as well as that there exists a problem of information singularity in the Shannon information theory .