Surface NMR forward modelling
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KernelV0.h 11KB

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  1. /* This file is part of Lemma, a geophysical modelling and inversion API.
  2. * More information is available at http://lemmasoftware.org
  3. */
  4. /* This Source Code Form is subject to the terms of the Mozilla Public
  5. * License, v. 2.0. If a copy of the MPL was not distributed with this
  6. * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  7. */
  8. /**
  9. * @file
  10. * @date 11/11/2016 01:47:34 PM
  11. * @author Trevor Irons (ti)
  12. * @email tirons@egi.utah.edu
  13. * @copyright Copyright (c) 2016, University of Utah
  14. * @copyright Copyright (c) 2016, Lemma Software, LLC
  15. * @copyright Copyright (c) 2008, Colorado School of Mines
  16. */
  17. #ifndef KERNELV0_INC
  18. #define KERNELV0_INC
  19. #pragma once
  20. #include "LemmaObject.h"
  21. #include "LayeredEarthEM.h"
  22. #include "PolygonalWireAntenna.h"
  23. #include "EMEarth1D.h"
  24. #ifdef LEMMAUSEVTK
  25. #include "vtkHyperOctree.h"
  26. #include "vtkHyperOctreeCursor.h"
  27. #include "vtkXMLHyperOctreeWriter.h"
  28. #include "vtkDoubleArray.h"
  29. #endif
  30. namespace Lemma {
  31. struct EllipticB {
  32. Vector3r bhat;
  33. Vector3r bhatp;
  34. Real alpha;
  35. Real beta;
  36. Complex eizt;
  37. Real zeta;
  38. };
  39. template <typename T> int sgn(T val) {
  40. return (val > T(0)) - (val < T(0));
  41. }
  42. /**
  43. * \ingroup Merlin
  44. * \brief
  45. * \details
  46. */
  47. class KernelV0 : public LemmaObject {
  48. friend std::ostream &operator<<(std::ostream &stream, const KernelV0 &ob);
  49. protected:
  50. /*
  51. * This key is used to lock the constructor. It is protected so that inhereted
  52. * classes also have the key to contruct their base class.
  53. */
  54. struct ctor_key {};
  55. public:
  56. // ==================== LIFECYCLE =======================
  57. /**
  58. * Default constructor.
  59. * @note This method is locked, and cannot be called directly.
  60. * The reason that the method is public is to enable the use
  61. * of make_shared whilst enforcing the use of shared_ptr,
  62. * in c++-17, this curiosity may be resolved.
  63. * @see KernelV0::NewSP
  64. */
  65. explicit KernelV0 ( const ctor_key& );
  66. /**
  67. * DeSerializing constructor.
  68. * @note This method is locked, and cannot be called directly.
  69. * The reason that the method is public is to enable the use
  70. * of make_shared whilst enforcing the use of shared_ptr,
  71. * in c++-17, this curiosity may be resolved.
  72. * @see KernelV0::DeSerialize
  73. */
  74. KernelV0 ( const YAML::Node& node, const ctor_key& );
  75. /**
  76. * Default destructor.
  77. * @note This method should never be called due to the mandated
  78. * use of smart pointers. It is necessary to keep the method
  79. * public in order to allow for the use of the more efficient
  80. * make_shared constructor.
  81. */
  82. virtual ~KernelV0 ();
  83. /**
  84. * Uses YAML to serialize this object.
  85. * @return a YAML::Node
  86. * @see KernelV0::DeSerialize
  87. */
  88. virtual YAML::Node Serialize() const;
  89. /*
  90. * Factory method for generating concrete class.
  91. * @return a std::shared_ptr of type KernelV0
  92. */
  93. static std::shared_ptr< KernelV0 > NewSP();
  94. /**
  95. * Constructs an KernelV0 object from a YAML::Node.
  96. * @see KernelV0::Serialize
  97. */
  98. static std::shared_ptr<KernelV0> DeSerialize(const YAML::Node& node);
  99. // ==================== OPERATORS =======================
  100. // ==================== OPERATIONS =======================
  101. /**
  102. * @return std::shared_ptr<LayeredEarthEM>
  103. */
  104. inline std::shared_ptr<LayeredEarthEM> GetSigmaModel ( ) {
  105. return SigmaModel;
  106. } // ----- end of method KernelV0::get_SigmaModel -----
  107. /**
  108. * @return the kernel matrix
  109. */
  110. inline MatrixXcr GetKernel ( ) {
  111. return Kern;
  112. }
  113. /**
  114. * @param[in] value the 1D-EM model used for calculations
  115. */
  116. inline void SetLayeredEarthEM ( std::shared_ptr< LayeredEarthEM > value ) {
  117. SigmaModel = value;
  118. return ;
  119. } // ----- end of method KernelV0::set_SigmaModel -----
  120. /**
  121. *
  122. */
  123. inline void SetIntegrationSize ( const Vector3r& size ) {
  124. Size = size;
  125. return ;
  126. } // ----- end of method KernelV0::SetIntegrationSize -----
  127. /**
  128. *
  129. */
  130. inline void SetIntegrationOrigin ( const Vector3r& origin ) {
  131. Origin = origin;
  132. return ;
  133. } // ----- end of method KernelV0::SetIntegrationOrigin -----
  134. /**
  135. *
  136. */
  137. inline void SetPulseCurrent ( const VectorXr& Amps ) {
  138. PulseI = Amps;
  139. return ;
  140. } // ----- end of method KernelV0::SetIntegrationOrigin -----
  141. /**
  142. * Assign transmiter coils
  143. */
  144. inline void PushCoil( const std::string& label, std::shared_ptr<PolygonalWireAntenna> ant ) {
  145. TxRx[label] = ant;
  146. }
  147. /**
  148. * Calculates a single imaging kernel, however, phased arrays are supported
  149. * so that more than one transmitter and/or receiver can be specified.
  150. * @param[in] tx is the list of transmitters to use for a kernel, use the same labels as
  151. * used in PushCoil.
  152. * @param[in] rx is the list of receivers to use for a kernel, use the same labels as
  153. * used in PushCoil. @see PushCoil
  154. * @param[in] vtkOutput generates a VTK hyperoctree file as well, useful for visualization.
  155. * requires compilation of Lemma with VTK.
  156. */
  157. void CalculateK0 (const std::vector< std::string >& tx, const std::vector< std::string >& rx,
  158. bool vtkOutput=false );
  159. /**
  160. * Sets the temperature, which has implications in calculation of \f$ M_N^{(0)}\f$. Units in
  161. * Kelvin.
  162. */
  163. inline void SetTemperature(const Real& tempK) {
  164. Temperature = tempK;
  165. }
  166. /**
  167. * Sets the tolerance to use for making the adaptive mesh
  168. *
  169. */
  170. inline void SetTolerance(const Real& ttol) {
  171. tol = ttol;
  172. }
  173. inline void SetPulseDuration(const Real& taup) {
  174. Taup = taup;
  175. }
  176. inline void SetDepthLayerInterfaces( const VectorXr& iface ){
  177. Interfaces = iface;
  178. }
  179. // ==================== INQUIRY =======================
  180. /**
  181. * Returns the name of the underlying class, similiar to Python's type
  182. * @return string of class name
  183. */
  184. virtual inline std::string GetName() const {
  185. return CName;
  186. }
  187. protected:
  188. // ==================== LIFECYCLE =======================
  189. /** Copy is disabled */
  190. KernelV0( const KernelV0& ) = delete;
  191. private:
  192. /**
  193. * Returns the kernel value for an input prism
  194. */
  195. VectorXcr f( const Vector3r& r, const Real& volume , const Vector3cr& Ht, const Vector3cr& Hr);
  196. // Complex ComputeV0Cell(const EllipticB& EBT, const EllipticB& EBR,
  197. // const Real& sintheta, const Real& phase, const Real& Mn0Abs,
  198. // const Real& vol);
  199. EllipticB EllipticFieldRep (const Vector3cr& B, const Vector3r& B0hat);
  200. Vector3r ComputeMn0(const Real& Porosity, const Vector3r& B0);
  201. void IntegrateOnOctreeGrid( bool vtkOutput=false );
  202. /**
  203. * Recursive call to integrate a function on an adaptive Octree Grid.
  204. * For efficiency's sake the octree grid is not stored, as only the
  205. * integral (sum) is of interest. The logic for grid refinement is based
  206. * on an Octree representation of the domain. If an Octree representation
  207. * of the kernel is desired, call alternative version @see EvaluateKids2
  208. * @param[in] size gives the domain size, in metres
  209. * @param[in] level gives the current level of the octree grid, call with 0 initially
  210. * @param[in] cpos is the centre position of the parent cuboid
  211. */
  212. void EvaluateKids( const Vector3r& size, const int& level, const Vector3r& cpos,
  213. const VectorXcr& parentVal );
  214. #ifdef LEMMAUSEVTK
  215. /**
  216. * Same functionality as @see EvaluateKids, but includes generation of a VTK
  217. * HyperOctree, which is useful for visualization.
  218. */
  219. void EvaluateKids2( const Vector3r& size, const int& level, const Vector3r& cpos,
  220. const VectorXcr& parentVal, vtkHyperOctree* octree, vtkHyperOctreeCursor* curse );
  221. void GetPosition( vtkHyperOctreeCursor* Cursor, Real* p );
  222. #endif
  223. // ==================== DATA MEMBERS =========================
  224. int ilay;
  225. int nleaves;
  226. int minLevel=4;
  227. int maxLevel=8;
  228. Real VOLSUM;
  229. Real tol=1e-11;
  230. Real Temperature=283.;
  231. Real Taup = .020; // Sec
  232. Real Larmor;
  233. Vector3r Size;
  234. Vector3r Origin;
  235. VectorXr PulseI;
  236. VectorXr Interfaces;
  237. MatrixXcr Kern;
  238. std::shared_ptr< LayeredEarthEM > SigmaModel = nullptr;
  239. std::shared_ptr< FieldPoints > cpoints;
  240. std::map< std::string , std::shared_ptr< PolygonalWireAntenna > > TxRx;
  241. std::map< std::string , std::shared_ptr< EMEarth1D > > EMEarths;
  242. #ifdef LEMMAUSEVTK
  243. std::map< int, VectorXcr > LeafDict;
  244. std::map< int, int > LeafDictIdx;
  245. std::map< int, Real > LeafDictErr;
  246. #endif
  247. // Physical constants and conversion factors
  248. static constexpr Real GAMMA = 2.67518e8; // MKS units
  249. static constexpr Real INVSQRT2 = 0.70710678118654746;
  250. static constexpr Real HBAR = 1.05457148e-34; // m2 kg / s
  251. static constexpr Real NH2O = 6.692e28; // [m^3]
  252. static constexpr Real KB = 1.3805e-23; // m^2 kg s-2 K-1
  253. static constexpr Real CHI_N = 3.29e-3; // MKS units
  254. /** ASCII string representation of the class name */
  255. static constexpr auto CName = "KernelV0";
  256. }; // ----- end of class KernelV0 -----
  257. } // ----- end of namespace Lemma ----
  258. /* vim: set tabstop=4 expandtab */
  259. /* vim: set filetype=cpp */
  260. #endif // ----- #ifndef KERNELV0_INC -----