Dynamic Prediction Research of Silicon Content in Hot Metal Driven by Big Data in Blast Furnace Smelting Process under Hadoop Cloud Platform

Algorithm 4

Parallel algorithm design of Pegasos’ tth iteration.

//Map

Input: , The number of nodes , the number of random samples taken per iteration ;

Output: The current node obtained , among them: .

Main procedure:

1. Randomly selected k/M samples;

2. Define the zero vector ;

3. For to k/M

   If

   Then

4. Solving get

//Reduce

Input: The current number of iterations , , the number of nodes , the number of random samples taken per iteration ;

Output: .

Main procedure:

1. Calculate ;

2. Calculate ;

3. Calculate:

;

4. Calculate: