com.olapdb.obase.utils.Annealing Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of olap-core Show documentation

The newest version!

package com.olapdb.obase.utils;

public class Annealing {
	public final static double FIRM_COEF = 1.0;
	public final static double RECM_COEF = 0.99;
	private final static double PERIOD = 86400000.0;
	private final static long ORIGIN = 1451577600000L;  //2016.01.01 1451577600000

	public static double anneValue(double value, double coef){
		if(coef == FIRM_COEF)return value;

		long past = System.currentTimeMillis() - ORIGIN;
		if(past <0)return value;

		return value*Math.pow(coef, past/PERIOD);
	}

	public static double unneValue(double value, double coef){
		if(coef == FIRM_COEF)return value;

		long past = System.currentTimeMillis() - ORIGIN;
		return value/Math.pow(coef, past/PERIOD);
	}

	/////////////////////////////////
	public static double add(double old, double inc, double coef){
		return old + unneValue(inc, coef );
	}
}