max iteration when lr becomes zero
      
    
      
      
    
      
      
    
      
      
    
      coeffient of decay, refer to calculation formula
      
    
      
      
    
      update learning rate by config table and state table
update learning rate by config table and state table
init optiMethod.
      
    
      
      
    
      
      
    
      
      
    
      
A learning rate decay policy, where the effective learning rate follows a polynomial decay, to be zero by the max_iteration. Calculation: base_lr (1 - iter/maxIteration)
^(power)coeffient of decay, refer to calculation formula
max iteration when lr becomes zero