A Service-Based Method for Multiple Sensor Streams Aggregation in Fog Computing

Algorithm 1

Event capturing algorithm.

Input:

E = : a set of data series in the same window;

: the change threshold of PCC;

limit: the maximum value for the time lag vector;

output:

event;

obtain all pairs  in E;

for each  

if    and   have different numbers of records

the difference of their records’ numbers;

getLongerSeries;

getShorterSeries;

interpolation;

else

;

;

end if

aligned data series from  based DTW

calculate correlation coefficient cor of  ;

if >=

an event is captured;

break;

end if

end for