particle-swarm-optimization main templates added

eo/src/eoLinearDecreasingWeightUp.h

@@ -0,0 +1,75 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// eoLinearDecreasingWeightUp.h
+// (c) OPAC 2007
+/*
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Contact: thomas.legrand@lifl.fr
+ */
+//-----------------------------------------------------------------------------
+
+#ifndef EOLINEARDECREASINGWEIGHTUP_H
+#define EOLINEARDECREASINGWEIGHTUP_H
+
+//-----------------------------------------------------------------------------
+#include <eoWeightUpdater.h>
+//-----------------------------------------------------------------------------
+
+
+/**
+ * Linear (inertia) weight updater. Update a weight according to:
+ * w(t)=(w(0)-w(Nt))*(Nt -t)/Nt + w(Nt) where
+ *  t is the current generation/event
+ *  Nt is the total number of generations/event
+ *  w(0) is the initial weight
+ *  w(Nt) is the last inertia weight
+ */
+template <class WeightType, class StopCriteriaType> class eoLinearDecreasingWeightUp:public eoWeightUpdater<WeightType>
+{
+public:
+
+    /**
+     * Ctor
+     */
+    eoLinearDecreasingWeightUp(
+        const StopCriteriaType & _stop,
+        const WeightType  & _initialValue,
+        const WeightType & _finalValue,
+        eoValueParam<StopCriteriaType> &  _counter):
+            stop(_stop),
+            initialValue(_initialValue),
+            finalValue(_finalValue),
+            counter(_counter){}
+
+    /**
+     * Update the given weight
+     */
+    void operator() (WeightType & _weight)
+    {
+        _weight=(initialValue-finalValue)* (WeightType)(stop-counter.value())/(WeightType)stop + finalValue;
+
+    }
+
+protected:
+    const StopCriteriaType & stop;
+    const WeightType & initialValue,finalValue;
+    eoValueParam<StopCriteriaType> & counter; // a counter of the number of past events (should say "generations")
+};
+
+
+
+#endif/*EOLINEARDECREASINGWEIGHTUP_H*/