Comprehensive Evaluation of Offshore Oilfield Development Plans Based on Grey Clustering Analysis with Cloud Model

Algorithm 1

Backward normal cloud generator.

INPUT: Cloud drops and its certainty degrees

OUTPUT: The numerical characteristics

Step 1. Generate the mean value of the samples , that is the expectation ;

Step 2. Generate the standard deviation of the samples , that is the entropy ;

Step 3. For each pair of , generate the hyper entropy of the samples ;

,