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enhancement_3
Trevor Irons vor 8 Jahren
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  1. 244
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      Modules/FDEM1D/include/KernelEM1DReflBase.h

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Modules/FDEM1D/include/KernelEM1DReflBase.h Datei anzeigen

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+/* This file is part of Lemma, a geophysical modelling and inversion API */
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+
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+/* This Source Code Form is subject to the terms of the Mozilla Public
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+ * License, v. 2.0. If a copy of the MPL was not distributed with this
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+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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+
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+/**
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+  @file
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+  @author   Trevor Irons
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+  @date     05/18/2012
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+ **/
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+
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+#ifndef  KERNELEM1DREFLBASE_INC
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+#define  KERNELEM1DREFLBASE_INC
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+
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+#include "KernelEM1DBase.h"
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+#include "DipoleSource.h"
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+#include "LayeredEarthEM.h"
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+
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+namespace Lemma {
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+
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+    enum DIPOLE_LOCATION { INAIR, INGROUND };
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+
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+    // forward declaration for friend
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+    template<EMMODE Mode, int Ikernel, DIPOLE_LOCATION Isource, DIPOLE_LOCATION Irecv>
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+    class KernelEM1DSpec;
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+
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+
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+    // ===================================================================
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+    //  Class:  KernelEM1DReflBase
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+    /**
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+      @class
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+      \brief   Abstract class defining EM1DRefl class.
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+      \details Derived classes are template specialized for optimal performance.
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+     */
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+    // ===================================================================
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+    class KernelEM1DReflBase : public LemmaObject {
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+
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+        template<EMMODE Mode, int Ikernel, DIPOLE_LOCATION Isource, DIPOLE_LOCATION Irecv>
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+        friend class KernelEM1DSpec;
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+        friend class KernelEM1DManager;
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+        //friend class DipoleSource;
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+
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+        public:
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+
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+            // ====================  LIFECYCLE     =======================
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+
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+            // ====================  OPERATORS     =======================
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+
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+            // ====================  OPERATIONS    =======================
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+
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+            void Initialise( std::shared_ptr<LayeredEarthEM> EarthIn) {
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+
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+                nlay = EarthIn->GetNumberOfLayers();
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+                zh = VectorXcr::Zero(nlay);
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+                yh = VectorXcr::Zero(nlay);
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+                u = VectorXcr::Zero(nlay);
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+                cf = VectorXcr::Zero(nlay);    // nlay -1 (lay 0 empty)
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+                rtu = VectorXcr::Zero(nlay);   // nlay -1 Interfaces only
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+                rtd = VectorXcr::Zero(nlay);   // nlay -1 Interfaces only
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+                kk = VectorXcr::Zero(nlay);
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+                Zyu = VectorXcr::Zero(nlay);
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+                Zyd = VectorXcr::Zero(nlay);
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+                Zyi = VectorXcr::Zero(nlay);
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+                th = VectorXcr::Zero(nlay);
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+
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+                // Don't attach Earth, because this is performance critical.
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+                // Everying is internal, it's OK relax Frankie
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+                //if (Earth != NULL) {
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+                //    Earth->DetachFrom(this);
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+                //    Earth = NULL;
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+                //}
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+                //EarthIn->AttachTo(this);
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+                Earth = EarthIn;
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+
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+                LayerThickness.resize(nlay);
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+                for (int ilay=0; ilay<nlay; ++ilay) {
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+                    LayerThickness(ilay) =  Earth->GetLayerThickness(ilay);
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+                }
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+
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+                LayerDepth.resize(nlay);
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+                for (int ilay=0; ilay<nlay; ++ilay) {
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+                    LayerDepth(ilay) =  Earth->GetLayerDepth(ilay);
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+                }
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+
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+            }
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+
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+            void SetUpSource( std::shared_ptr<DipoleSource> Dipole, const int &ifreq ) {
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+
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+                zh(0) = Complex(0, Dipole->GetAngularFrequency(ifreq)*MU0);
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+                yh(0) = Complex(0, Dipole->GetAngularFrequency(ifreq)*EPSILON0);
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+                kk(0) = -zh(0) * yh(0);
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+
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+                Earth->EvaluateColeColeModel(Dipole->GetAngularFrequency(ifreq));
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+
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+                for (int ilay=1; ilay<Earth->GetNumberOfLayers(); ++ilay) {
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+                    zh(ilay) = zh(0) * Earth->GetLayerSusceptibility(ilay);
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+                    yh(ilay) = Earth->GetLayerConductivity(ilay) +
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+                            yh(0)*Earth->GetLayerPermitivity(ilay);
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+                    kk(ilay)   = -zh(ilay)*yh(ilay);
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+                }
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+
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+                tx_z = Dipole->GetLocation(2);
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+                lays = 0;
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+                Real Depth(0);
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+                for (int ilay=1; ilay<nlay; ++ilay) {
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+                    if (tx_z > Depth) {
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+                        lays = ilay;
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+                    }
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+                    Depth += LayerThickness(ilay);
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+                }
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+            }
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+
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+            void SetUpReceiver(const Real &rz) {
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+                rx_z = rz;
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+                Real Depth(0.);
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+                layr = 0;
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+                for (int ilay=1; ilay<Earth->GetNumberOfLayers(); ++ilay) {
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+                    if (rx_z > Depth) {
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+                        layr = ilay;
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+                    }
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+                    Depth += LayerThickness(ilay);
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+                }
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+            }
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+
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+            // ====================  ACCESS        =======================
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+            Complex GetYm() {
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+                return yh(layr);
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+            }
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+
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+            Complex GetZm() {
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+                return zh(layr);
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+            }
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+
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+            Complex GetZs() {
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+                return zh(lays);
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+            }
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+
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+            Complex GetKs() {
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+                return kk(lays);
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+            }
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+
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+            // ====================  INQUIRY       =======================
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+
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+        protected:
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+
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+            // ====================  LIFECYCLE     =======================
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+
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+            /// Default protected constructor.
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+            KernelEM1DReflBase ( ) : LemmaObject( )
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+            {
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+            }
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+
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+            /// Default protected constructor.
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+            ~KernelEM1DReflBase () {
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+            }
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+
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+            // ====================  OPERATIONS    =======================
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+
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+            /** Computes reflection coefficients. Depending on the
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+             * specialisation, this will either be TM or TE mode.
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+             */
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+            virtual void ComputeReflectionCoeffs(const Real& lambda)=0;
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+
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+            /** Precomputes expensive calculations that are reused by insances
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+             * of KernelEM1DSpec in the calculation of Related potentials.
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+             */
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+            virtual void PreComputePotentialTerms()=0;
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+
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+            // ====================  DATA MEMBERS  =========================
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+
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+			/// Bessel order, only 0 or 1 supported
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+			int id; // Needs to be dim nRel, or separate
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+
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+            /// Layer the source is in
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+			int lays;
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+
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+			/// Layer the receiver is in
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+			int layr;
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+
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+			/// Number of Layers
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+			int nlay;
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+
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+            /// Number of Related kernels to be computed
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+            int nRelated;
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+
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+            /// Used in related kernel precompute calls
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+            int relIud;
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+
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+			/// Receiver z position
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+			Real rx_z;
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+
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+			/// Transmitter z position
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+			Real tx_z;
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+
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+            /// bessel arg squared
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+            Real rams;
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+
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+            /** Related part of con term */
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+            Complex  relCon;
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+
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+            Complex  relenukadz;
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+
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+            Complex  relexp_pbs1;
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+
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+            Complex  relexp_pbs2;
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+
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+            Complex  rel_a;
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+
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+			/// TM or TE mode
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+			EMMODE mode;
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+
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+            /// Pointer to layered earth
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+            std::shared_ptr<LayeredEarthEM> Earth;
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+
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+			Complex       uk;
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+			Complex       um;
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+			VectorXcr     cf;  // nlay
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+			VectorXcr      u;  // nlay
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+			VectorXcr     yh;  // nlay
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+			VectorXcr     zh;  // nlay
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+			VectorXcr     kk;  // nlay
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+			VectorXcr    Zyu;  //(nlay); //Zyu.setZero();
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+			VectorXcr    Zyd;  //(nlay); //Zyd.setZero();
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+			VectorXcr    Zyi;  //(nlay); //Zyi.setZero();
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+			VectorXcr     th;  //(nlay);
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+			VectorXr     LayerThickness;
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+			VectorXr     LayerDepth;
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+
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+			/// Reflection/Transmission coeffients for upgoing waves in a
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+			/// layered earth model
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+			VectorXcr    rtu;
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+
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+			/// Reflection/Transmission coeffients for downgoing waves in
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+			/// a layered earth model
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+			VectorXcr    rtd;
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+
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+        private:
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+
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+    }; // -----  end of class  KernelEM1DReflBase  -----
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+
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+}		// -----  end of Lemma  name  -----
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+
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+#endif   // ----- #ifndef KERNELEM1DREFLBASE_INC  -----

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