/*
* Encog(tm) Core v3.4 - Java Version
* http://www.heatonresearch.com/encog/
* https://github.com/encog/encog-java-core
* Copyright 2008-2016 Heaton Research, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
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*/
package org.encog.neural.networks.training.propagation.resilient;
/**
* Constants used for Resilient Propagation (RPROP) training.
*/
public final class RPROPConst {
/**
* Private constructor.
*/
private RPROPConst() {
}
/**
* The default zero tolerance.
*/
public static final double DEFAULT_ZERO_TOLERANCE = 0.00000000000000001;
/**
* The POSITIVE ETA value. This is specified by the resilient propagation
* algorithm. This is the percentage by which the deltas are increased by if
* the partial derivative is greater than zero.
*/
public static final double POSITIVE_ETA = 1.2;
/**
* The NEGATIVE ETA value. This is specified by the resilient propagation
* algorithm. This is the percentage by which the deltas are increased by if
* the partial derivative is less than zero.
*/
public static final double NEGATIVE_ETA = 0.5;
/**
* The minimum delta value for a weight matrix value.
*/
public static final double DELTA_MIN = 1e-6;
/**
* The starting update for a delta.
*/
public static final double DEFAULT_INITIAL_UPDATE = 0.1;
/**
* The maximum amount a delta can reach.
*/
public static final double DEFAULT_MAX_STEP = 50;
}