mirror of
https://github.com/wassname/simpeg.git
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Lindsey Heagy
142 lines
3.6 KiB
Python
142 lines
3.6 KiB
Python
from SimPEG import Problem
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from SimPEG.EM.Base import BaseEMProblem
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from SurveyDC import Survey
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from FieldsDC import Fields, Fields_CC
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import numpy as np
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from SimPEG.Utils import Zero
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class BaseDCProblem(BaseEMProblem):
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surveyPair = Survey
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fieldsPair = Fields
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def fields(self, m):
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self.curModel = m
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f = self.fieldsPair(self.mesh, self.survey)
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A = self.getA()
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self.Ainv = self.Solver(A, **self.solverOpts)
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RHS = self.getRHS()
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u = self.Ainv * RHS
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Srcs = self.survey.srcList
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f[Srcs, self._solutionType] = u
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return f
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def Jvec(self, m, v, f=None):
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if f is None:
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f = self.fields(m)
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self.curModel = m
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Jv = self.dataPair(self.survey) #same size as the data
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A = self.getA()
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Ainv = self.Solver(A, **self.solverOpts)
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for src in self.survey.srcList:
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u_src = f[src, self._solutionType] # solution vector
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dA_dm_v = self.getADeriv(u_src, v)
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dRHS_dm_v = self.getRHSDeriv(src, v)
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print type(dA_dm_v + dRHS_dm_v), (dA_dm_v + dRHS_dm_v).shape
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du_dm_v = Ainv * ( - dA_dm_v + dRHS_dm_v )
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for rx in src.rxList:
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df_dmFun = getattr(f, '_%sDeriv'%rx.projField, None)
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df_dm_v = df_dmFun(src, du_dm_v, v, adjoint=False)
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Jv[src, rx] = rx.evalDeriv(src, self.mesh, f, df_dm_v)
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Ainv.clean()
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return Utils.mkvc(Jv)
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def Jtvec(self, m, v, f=None):
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raise NotImplementedError
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def getSourceTerm(self):
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"""
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takes concept of source and turns it into a matrix
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"""
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"""
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Evaluates the sources for a given frequency and puts them in matrix form
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:param float freq: Frequency
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:rtype: (numpy.ndarray, numpy.ndarray)
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:return: s_m, s_e (nE or nF, nSrc)
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"""
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Srcs = self.survey.srcList
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if self._formulation is 'EB':
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n = self.mesh.nN
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# return NotImplementedError
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elif self._formulation is 'HJ':
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n = self.mesh.nC
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q = np.zeros((n, len(Srcs)))
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for i, src in enumerate(Srcs):
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q[:,i] = src.eval(self)
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return q
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class Problem3D_CC(BaseDCProblem):
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_solutionType = 'phiSolution'
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_formulation = 'HJ' # CC potentials means J is on faces
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fieldsPair = Fields_CC
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def __init__(self, mesh, **kwargs):
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BaseDCProblem.__init__(self, mesh, **kwargs)
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def getA(self):
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"""
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Make the A matrix for the cell centered DC resistivity problem
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A = D MfRhoI D^\\top V
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"""
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# TODO: this won't work for full anisotropy
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D = self.mesh.faceDiv
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MfRhoI = self.MfRhoI
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V = self.Vol
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A = D * ( MfRhoI * ( D.T * V ) )
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if self._makeASymmetric is True:
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return V.T * A
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return A
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def getADeriv(self, u, v, adjoint= False):
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D = self.mesh.faceDiv
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MfRhoIDeriv = self.MfRhoIDeriv
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V = self.Vol
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if adjoint:
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if self._makeASymmetric is True:
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v = V * v
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return V.T * ( D * ( MfRhoIDeriv(D * v) ) )
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if self._makeASymmetric is True:
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return V.T * ( D * ( MfRhoIDeriv( * D.T * ( V * u ) ) * v ) )
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return D * ( MfRhoIDeriv( D.T * ( V * v ) ) )
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def getRHS(self):
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"""
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RHS for the DC problem
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q
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"""
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RHS = self.getSourceTerm()
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if self._makeASymmetric is True:
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return self.Vol.T * RHS
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return RHS
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def getRHSDeriv(self, src, v, adjoint=False):
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return Zero()
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