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E4D User Guide

  • Electrical Run Modes
    • Mesh Generation
    • Forward Modeling
    • Inverse Modeling
    • Time-lapse Inverse Modeling
  • Files
    • Input
    • Output
    • Syntax Rules
  • Using E4D
    • Running E4D
    • Visualization Utilities
    • Dictionary of Terms

Breadcrumb

  1. E4D Website
  2. E4D User Guide

E4D Run Log File (e4d.log)

All E4D modes record execution information to the E4D log file, <e4d.log>. In addition to the date and time of execution, the log file records all information required to reproduce the simulation, including the names of all input files and corresponding summary statistics. The log file also produces summary information concerning the number of processors used for the simulation, and the computational load on each processor. The <e4d.log> file is overwritten with each new execution of E4D. If necessary, users should rename or move <e4d.log> prior to additional E4D computations.

  • Mesh Generation
  • Forward Modeling
  • Inverse Modeling
  • Time-Lapse Inverse Modeling
 ************************ WELCOME TO E4D ************************
 Copyright © 2014, Battelle Memorial Institute
 All rights reserved.
 Current date:  March 12, 2020
 Current time:  09:27:16
 Running on 0000001 processing cores
 ****************************************************************

 ************* RUNNING IN MESH GENERATION MODE (ERT) ************
  Mode:                             001
  Mesh configuration file:          two_blocks.cfg

 ************************ WELCOME TO E4D ************************
 Copyright © 2014, Battelle Memorial Institute
 All rights reserved.
 Current date:  March 12, 2020
 Current time:  04:50:00
 Running on 0000002 processing cores
 ****************************************************************

 ***************** RUNNING IN ERT FORWARD MODE ******************
  Mode:                             002
  Mesh file:                        two_blocks.1.ele
  Survey configuration file:        two_blocks.srv
  Conductivity file:                two_blocks.sig
  Output options file:              two_blocks.out

  SURVEY FILE SUMMARY
  Number of electrodes:             0000048
  Number of measurements:           0002070

  CONDUCTIVITY FILE SUMMARY
  Number of conductivity values:    0000104579

  MESH SUMMARY
  Number of nodes:                  0000018276
  Number of metallic boundaries:    0000000000
  Number of elements:               0000104579
  Number of zones:                  0000000004

  LOAD SUMMARY
  Max # of pole soln's per core:    0000000048
  Max # of data rows per core:      0000002070
  Min # of pole soln's per core:    0000000048
  Min # of data rows per core:      0000002070

  WRITING POTENTIAL FILES
  Not printing Jacobian matrix

  WRITING SIMULATED SURVEY FILE: two_blocks.sig.srv

  Forward run complete.
Convergence information and other inversion progress parameters at each outer iteration is provided.
************************ WELCOME TO E4D ************************
 Copyright © 2014, Battelle Memorial Institute
 All rights reserved.
 Current date:  March 12, 2020
 Current time:  10:52:28
 Running on 0000005 processing cores
 ****************************************************************

 **************** RUNNING IN ERT INVERSION MODE *****************
  Mode:                             003
  Mesh file:                        sp.1.node
  Survey configuration file:        baseline.sig.srv
  Starting conductivity file:       0.002
  Output options file:              sp.out
  Inverse options file:             sp.inv
  Reference model file:             none

  SURVEY FILE SUMMARY
  Number of electrodes:             0000048
  Number of measurements:           0002070

  MESH SUMMARY
  Number of nodes:                  0000016686
  Number of metallic boundaries:    0000000000
  Number of elements:               0000094675
  Number of zones:                  0000000002

  LOAD SUMMARY
  Max # of pole soln's per core:    0000000012
  Max # of data rows per core:      0000000518
  Min # of pole soln's per core:    0000000012
  Min # of data rows per core:      0000000517

  INVERSION OPTIONS
  Inversion options file:           sp.inv
  Number of constraint blocks:      002

            CONSTRAINT BLOCK:          1
                 Zone Number:          1
            Structure Metric:          2
        Reweighting Function:          1
   Reweighting Mean, St.Dev.:          10.00    0.1500E-01
        Number of Zone Links:          1
              Linked to Zone:          2
             Relative Weight:          1.000

            CONSTRAINT BLOCK:          2
                 Zone Number:          2
            Structure Metric:          2
        Reweighting Function:          1
   Reweighting Mean, St.Dev.:          10.00    0.3000E-01
        Number of Zone Links:          0
             Relative Weight:          1.000

         Starting beta value:          500.0
 Minimum objective reduction:          0.2000
    Beta reduction parameter:          0.5000
    Target chi-squared value:          1.000
  Minimum # inner iterations:         30
  Maximum # inner iterations:         50
        Maximum conductivity:           1.000
        Minimum conductivity:          0.1000E-04
               Update option:          No line search
  Data culling st. deviation:          3.000

 ********** CONVERGENCE STATISTICS AT STARTING MODEL *******************
    Phi_dat        Phi_Mod     Phi_Mod/Beta      Phi_Tot
    0.12872E+06     0.0000         0.0000        0.12872E+06

 Total Number of Constraint Eqs: 0000366534
 Block     # Constraints     % of Total Error     Error per Constraint
     1            239174           0.0000                   0.0000
     2            127360           0.0000                   0.0000

 Chi2 is currently  62.19       Target value is 1.0000
 Mean error is -1.020
 RMS error is  7.886
 Number of data culled is 0000000
 Prior to data culling ...
    Chi2 is  62.19
    Mean error is -1.020
    RMS error is  7.886
 ***********************************************************************

 ********** CONVERGENCE STATISTICS AFTER INVERSE UPDATE # 001 **********
    Phi_dat        Phi_Mod     Phi_Mod/Beta      Phi_Tot
     5783.4         22187.         44.374         27970.

 Total Number of Constraint Eqs: 0000366534
 Block     # Constraints     % of Total Error     Error per Constraint
     1            239174           67.160                  0.85598E-02
     2            127360           32.840                  0.78602E-02

 Chi2 is currently  2.838       Target value is 1.0000
 Mean error is -.2002
 RMS error is  1.685
 Number of data culled is 0000032
 Prior to data culling ...
    Chi2 is  9.029
    Mean error is 0.8725E-01
    RMS error is  3.005
 ***********************************************************************
Decrease in objective function is: 0.7827
Decrease in objective function is sufficient to continue at beta =  500.0

 ********** CONVERGENCE STATISTICS AFTER INVERSE UPDATE # 002 **********
    Phi_dat        Phi_Mod     Phi_Mod/Beta      Phi_Tot
     843.78         1123.3         2.2467         1967.1

 Total Number of Constraint Eqs: 0000366534
 Block     # Constraints     % of Total Error     Error per Constraint
     1            239174           59.457                  0.16411E-02
     2            127360           40.543                  0.21014E-02

 Chi2 is currently 0.4114       Target value is 1.0000
 Mean error is -.8735
 RMS error is 0.6414
 Number of data culled is 0000019
 Prior to data culling ...
    Chi2 is 0.4918
    Mean error is -.8627
    RMS error is 0.7013
 ***********************************************************************
Decrease in objective function is: 0.9297
Decrease in objective function is sufficient to continue at beta =  500.0
 SOLUTION CONVERGED
 _____________ADJUSTING FINAL SOLUTION FOR TIME_________________

 ********** FINAL SOLUTION ADJUSTMENT **************
        Phi_dat        Phi_Mod   Phi_Mod/Beta        Phi_Tot
        887.947       2950.325          5.901       3838.271
 Chi2 is currently  0.435481399     Target value is    1.00000000
 Mean error is  -0.711162746
 RMS error is    1.13622952
 Number of data culled is           31
 PRIOR TO DATA CULLING
 Phi_dat is    2091.41406
 Chi2 is    1.01034498
 Mean error is  -0.630670011
 RMS error is    1.12768948
 ********************************************************


Convergence information and other inversion progress parameters at each time step and outer iteration is provided.
  ************************ WELCOME TO E4D ************************
  Copyright © 2014, Battelle Memorial Institute
  All rights reserved.
  Current date:  March 12, 2020
  Current time:  12:13:55
  Running on 0000005 processing cores
  ****************************************************************

  *********** RUNNING IN TIME-LAPSE ERT INVERSION MODE ***********
   Mode:                             004
   Mesh file:                        sp.1.node
   Survey configuration file:        baseline.sig.srv
   Starting conductivity file:       baseline_sp.sig
   Output options file:              sp.out
   Inverse options file:             sp_tl.inv
   Reference model file:             baseline_sp.sig
   Time-lapse survey list file:      surveys.txt
   Reference model update option:    previous solution

   Time-lapse survey list file:      surveys.txt
   Num. of time-lapse survey files:            21
   Index     Time-Lapse Survey File       Time Stamp
      1             sig_0.0.sig.srv       0.0000
      2             sig_0.5.sig.srv      0.50000
      3             sig_1.0.sig.srv       1.0000
      4             sig_1.5.sig.srv       1.5000
      5             sig_2.0.sig.srv       2.0000
      6             sig_2.5.sig.srv       2.5000
      7             sig_3.0.sig.srv       3.0000
      8             sig_3.5.sig.srv       3.5000
      9             sig_4.0.sig.srv       4.0000
     10             sig_4.5.sig.srv       4.5000
     11             sig_5.0.sig.srv       5.0000
     12             sig_5.5.sig.srv       5.5000
     13             sig_6.0.sig.srv       6.0000
     14             sig_6.5.sig.srv       6.5000
     15             sig_7.0.sig.srv       7.0000
     16             sig_7.5.sig.srv       7.5000
     17             sig_8.0.sig.srv       8.0000
     18             sig_8.5.sig.srv       8.5000
     19             sig_9.0.sig.srv       9.0000
     20             sig_9.5.sig.srv       9.5000
     21            sig_10.0.sig.srv       10.000

   SURVEY FILE SUMMARY
   Number of electrodes:             0000048
   Number of measurements:           0002070

   CONDUCTIVITY FILE SUMMARY
   Number of conductivity values:    0000094675

   MESH SUMMARY
   Number of nodes:                  0000016686
   Number of metallic boundaries:    0000000000
   Number of elements:               0000094675
   Number of zones:                  0000000002

   LOAD SUMMARY
   Max # of pole soln's per core:    0000000012
   Max # of data rows per core:      0000000518
   Min # of pole soln's per core:    0000000012
   Min # of data rows per core:      0000000517

   INVERSION OPTIONS
   Inversion options file:           sp_tl.inv
   Number of constraint blocks:      002

             CONSTRAINT BLOCK:          1
                  Zone Number:          1
             Structure Metric:          8
         Reweighting Function:          1
    Reweighting Mean, St.Dev.:          10.00    0.1500
         Number of Zone Links:          1
               Linked to Zone:          2
         Reference model file:          baseline_sp.sig
              Relative Weight:          1.000

             CONSTRAINT BLOCK:          2
                  Zone Number:          2
             Structure Metric:          8
         Reweighting Function:          1
    Reweighting Mean, St.Dev.:          10.00    0.1500
         Number of Zone Links:          0
         Reference model file:          baseline_sp.sig
              Relative Weight:          1.000


          Starting beta value:          500.0
  Minimum objective reduction:          0.2000
     Beta reduction parameter:          0.5000
     Target chi-squared value:          1.000
   Minimum # inner iterations:         30
   Maximum # inner iterations:         50
         Maximum conductivity:           1.000
         Minimum conductivity:          0.1000E-04
                Update option:          No line search
   Data culling st. deviation:          3.000

  ********** CONVERGENCE STATISTICS AT STARTING MODEL *******************
     Phi_dat        Phi_Mod     Phi_Mod/Beta      Phi_Tot
      887.95         0.0000         0.0000         887.95

  Total Number of Constraint Eqs: 0000366534
  Block     # Constraints     % of Total Error     Error per Constraint
      1            239174           0.0000                   0.0000
      2            127360           0.0000                   0.0000

  Chi2 is currently 0.4355       Target value is 1.0000
  Mean error is -.7112
  RMS error is 0.6599
  Number of data culled is 0000031
  Prior to data culling ...
     Chi2 is  1.010
     Mean error is -.6307
     RMS error is  1.005
  ***********************************************************************


  ______________STARTING TIME-LAPSE_INVERSIONS____________



  _____________SURVEY TIME:    0.00000000

  ********** CONVERGENCE STATISTICS AT STARTING MODEL *******************
     Phi_dat        Phi_Mod     Phi_Mod/Beta      Phi_Tot
     0.17339E+07     0.0000         0.0000        0.17339E+07

  Total Number of Constraint Eqs: 0000366534
  Block     # Constraints     % of Total Error     Error per Constraint
      1            239174           0.0000                   0.0000
      2            127360           0.0000                   0.0000

  Chi2 is currently  840.9       Target value is 1.0000
  Mean error is 0.1193
  RMS error is  29.00
  Number of data culled is 0000008
  Prior to data culling ...
     Chi2 is  4493.
     Mean error is  2.734
     RMS error is  67.03
 ***********************************************************************
 .
 .
 .

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