A Cloud Service Trust Evaluation Model Based on Combining Weights and Gray Correlation Analysis

Algorithm 2

Pseudocode of direct trust update.

Algorithm: direct trust update;

Input: direct trust degree DT; user satisfaction threshold ; user satisfaction

evaluation E (q); penalty factor

Output: The direct trust of this transaction.

(1) public void UpdateDirectValue(int cloudletId. int vmId);

(2) ;

(3) double P(i)=Cloudletlist.getById(cloudletId.vmId).getcloudletPrice();

(4) double T(i)=Cloudletlist.getById(cloudletId.vmId).getcloudletTime();

(5) this. ST(cloudletId. vmId. E(q));

(6) if(ST >);

(7) double =Cloudletlist.getById(cloudletId.vmId).getcloudlet Penalty ();

(8) this. IncrementalDirectValue(cloudlet. vmId. P(i). T(i).);

(9) int t=DirectTable.getById(cloudletId,vmId).getTime;

(10) DirectTable.getById(cloudletId,vmId).getTime(t.K);// K is the time period

(11) DirectTable.getById(cloudletId,vmId).updateDirectValue(DT,

IncrementalDirectValue);

(12)