| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.horn.core; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hama.commons.math.FloatFunction; |
| |
| public abstract class Neuron<M extends Writable> implements Writable, NeuronInterface<M> { |
| int id; |
| float output; |
| float weight; |
| float delta; |
| |
| float momentumWeight; |
| float learningRate; |
| |
| int layerIndex; |
| boolean isOutputLayer; |
| |
| protected FloatFunction squashingFunction; |
| |
| public void setNeuronID(int id) { |
| this.id = id; |
| } |
| |
| public int getID() { |
| return id; |
| } |
| |
| public int getLayerIndex() { |
| return layerIndex; |
| } |
| |
| public void setLayerIndex(int index) { |
| this.layerIndex = index; |
| } |
| |
| public void feedforward(float sum) { |
| this.output = sum; |
| } |
| |
| public void backpropagate(float gradient) { |
| this.delta = gradient; |
| } |
| |
| public void setDelta(float delta) { |
| this.delta = delta; |
| } |
| |
| public float getDelta() { |
| return delta; |
| } |
| |
| public void setWeight(float weight) { |
| this.weight = weight; |
| } |
| |
| public void setOutput(float output) { |
| this.output = output; |
| } |
| |
| public float getOutput() { |
| return output; |
| } |
| |
| public void setMomentumWeight(float momentumWeight) { |
| this.momentumWeight = momentumWeight; |
| } |
| |
| public float getMomentumWeight() { |
| return momentumWeight; |
| } |
| |
| public void setLearningRate(float learningRate) { |
| this.learningRate = learningRate; |
| } |
| |
| public float getLearningRate() { |
| return learningRate; |
| } |
| |
| // //////// |
| |
| private int i; |
| |
| public void push(float weight) { |
| weights[i++] = weight; |
| } |
| |
| public float getUpdate() { |
| return weight; |
| } |
| |
| float[] weights; |
| |
| public void setWeightVector(int rowCount) { |
| i = 0; |
| weights = new float[rowCount]; |
| } |
| |
| public float[] getWeights() { |
| return weights; |
| } |
| |
| public void setSquashingFunction(FloatFunction squashingFunction) { |
| this.squashingFunction = squashingFunction; |
| } |
| |
| @Override |
| public void readFields(DataInput in) throws IOException { |
| id = in.readInt(); |
| output = in.readFloat(); |
| weight = in.readFloat(); |
| delta = in.readFloat(); |
| |
| momentumWeight = in.readFloat(); |
| learningRate = in.readFloat(); |
| } |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| out.writeInt(id); |
| out.writeFloat(output); |
| out.writeFloat(weight); |
| out.writeFloat(delta); |
| |
| out.writeFloat(momentumWeight); |
| out.writeFloat(learningRate); |
| } |
| |
| } |