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Java example source code file (RBM.java)

This example Java source code file (RBM.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

binary, builder, data, equalsandhashcode, gaussian, hiddenunit, linear, noargsconstructor, override, rbm, softmax, suppresswarnings, tostring, visibleunit

The RBM.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,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.
 *
 */

package org.deeplearning4j.nn.conf.layers;

import lombok.*;

import org.deeplearning4j.nn.conf.Updater;
import org.deeplearning4j.nn.conf.distribution.Distribution;
import org.deeplearning4j.nn.weights.WeightInit;

/**
 * Restricted Boltzmann Machine.
 *
 * Markov chain with gibbs sampling.
 *
 * Supports the following visible units:
 *     BINARY
 *     GAUSSIAN
 *     SOFTMAX
 *     LINEAR
 *
 * Supports the following hidden units:
 *     RECTIFIED
 *     BINARY
 *     GAUSSIAN
 *     SOFTMAX
 *
 * Based on Hinton et al.'s work
 *
 * Great reference:
 * http://www.iro.umontreal.ca/~lisa/publications2/index.php/publications/show/239
 *
 */

@Data @NoArgsConstructor
@ToString(callSuper = true)
@EqualsAndHashCode(callSuper = true)
public class RBM extends BasePretrainNetwork {
    protected HiddenUnit hiddenUnit;
    protected VisibleUnit visibleUnit;
    protected int k;
    protected double sparsity;

    public enum VisibleUnit {
        BINARY, GAUSSIAN, SOFTMAX, LINEAR
    }
    public enum HiddenUnit {
        RECTIFIED, BINARY, GAUSSIAN, SOFTMAX
    }

    private RBM(Builder builder) {
    	super(builder);
        this.hiddenUnit = builder.hiddenUnit;
        this.visibleUnit = builder.visibleUnit;
        this.k = builder.k;
        this.sparsity = builder.sparsity;
    }

    @AllArgsConstructor
    public static class Builder extends BasePretrainNetwork.Builder<Builder> {
        private HiddenUnit hiddenUnit= RBM.HiddenUnit.BINARY;
        private VisibleUnit visibleUnit = RBM.VisibleUnit.BINARY;
        private int k = 1;
        private double sparsity = 0f;

        public Builder(HiddenUnit hiddenUnit, VisibleUnit visibleUnit) {
            this.hiddenUnit = hiddenUnit;
            this.visibleUnit = visibleUnit;
        }

        public Builder() {}

        @Override
        @SuppressWarnings("unchecked")
        public RBM build() {
            return new RBM(this);
        }

        // convergence iterations
        public Builder k(int k){
        	this.k = k;
        	return this;
        }
        
        public Builder hiddenUnit(HiddenUnit hiddenUnit){
        	this.hiddenUnit =  hiddenUnit;
        	return this;
        }
        
        public Builder visibleUnit(VisibleUnit visibleUnit){
        	this.visibleUnit = visibleUnit;
        	return this;
        }

        public Builder sparsity(double sparsity){
            this.sparsity = sparsity;
            return this;
        }
    }
}

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