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seogi_macbook
66 lines
1.8 KiB
Python
66 lines
1.8 KiB
Python
import unittest
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import SimPEG.DCIP as DC
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from SimPEG import *
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class IPforwardTests(unittest.TestCase):
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def test_IPforward(self):
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cs = 12.5
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nc = 200/cs+1
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hx = [(cs,7, -1.3),(cs,nc),(cs,7, 1.3)]
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hy = [(cs,7, -1.3),(cs,int(nc/2+1)),(cs,7, 1.3)]
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hz = [(cs,7, -1.3),(cs,int(nc/2+1))]
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mesh = Mesh.TensorMesh([hx, hy, hz], 'CCN')
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sighalf = 1e-2
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sigma = np.ones(mesh.nC)*sighalf
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p0 = np.r_[-50., 50., -50.]
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p1 = np.r_[ 50.,-50., -150.]
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blk_ind = Utils.ModelBuilder.getIndicesBlock(p0, p1, mesh.gridCC)
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sigma[blk_ind] = 1e-3
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eta = np.zeros_like(sigma)
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eta[blk_ind] = 0.1
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sigmaInf = sigma.copy()
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sigma0 = sigma*(1-eta)
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nElecs = 11
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x_temp = np.linspace(-100, 100, nElecs)
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aSpacing = x_temp[1]-x_temp[0]
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y_temp = 0.
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xyz = Utils.ndgrid(x_temp, np.r_[y_temp], np.r_[0.])
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srcList = DC.Utils.WennerSrcList(nElecs,aSpacing)
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survey = DC.SurveyDC(srcList)
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imap = Maps.IdentityMap(mesh)
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problem = DC.ProblemDC_CC(mesh, mapping=imap)
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try:
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from pymatsolver import MumpsSolver
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solver = MumpsSolver
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except ImportError, e:
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solver = SolverLU
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problem.Solver = solver
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problem.pair(survey)
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phi0 = survey.dpred(sigma0)
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phiInf = survey.dpred(sigmaInf)
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phiIP_true = phi0-phiInf
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surveyIP = DC.SurveyIP(srcList)
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problemIP = DC.ProblemIP(mesh, sigma=sigma)
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problemIP.pair(surveyIP)
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problemIP.Solver = solver
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phiIP_approx = surveyIP.dpred(eta)
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err = np.linalg.norm(phiIP_true-phiIP_approx) / np.linalg.norm(phiIP_true)
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self.assertTrue(err < 0.02)
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if __name__ == '__main__':
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unittest.main()
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