45 lines
1.6 KiB
Java
45 lines
1.6 KiB
Java
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/*
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* Copyright 2015 Alexander Nozik.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package inr.numass.models;
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import inr.numass.NumassContext;
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import org.apache.commons.math3.analysis.BivariateFunction;
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import org.apache.commons.math3.analysis.UnivariateFunction;
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/**
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* Нотация простая - начальная энергия всегда слева, конечная всегда справа
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*
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* @author Darksnake
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*/
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class LossResConvolution implements BivariateFunction {
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BivariateFunction loss;
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BivariateFunction res;
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LossResConvolution(BivariateFunction loss, BivariateFunction res) {
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this.loss = loss;
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this.res = res;
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}
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@Override
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public double value(final double Ein, final double U) {
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UnivariateFunction integrand = (double Eout) -> loss.value(Ein, Eout) * res.value(Eout, U);
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//Энергия в принципе не может быть больше начальной и меньше напряжения
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return NumassContext.defaultIntegrator.integrate(integrand, U, Ein);
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}
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}
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