506 lines
18 KiB
Python
506 lines
18 KiB
Python
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from dolfin import *
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import dolfin
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import argparse
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from common import inout
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import numpy as np
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import sys
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# import ruamel.yaml as yaml
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from pathlib import Path
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import csv
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import shutil
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# parameters['allow_extrapolation'] = True
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# careful with this option... can give nonsensical results outside
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if '2017' in dolfin.__version__:
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class MPI(MPI):
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comm_world = MPI.comm_world
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def solution_function_space(options):
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''' Create function space to read in solution checkpoints, as specified in
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options.
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Args:
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options (dict): Options dictionary (from input file)
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Returns:
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FunctionSpace: Solution checkpoint function space
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'''
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mesh, _, _ = inout.read_mesh(options['mesh'])
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if 'fluid' in options:
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if options['fem']['velocity_space'].lower() == 'p2':
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Evel = VectorElement('P', mesh.ufl_cell(), 2)
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elif options['fem']['velocity_space'].lower() == 'p1':
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Evel = VectorElement('P', mesh.ufl_cell(), 1)
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else:
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raise Exception('Velocity space {} not yet implemented!'.format(
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options['fem']['velocity_space'].lower()))
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elif 'material' in options:
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if options['incompressibility']['mixed_formulation']:
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raise Exception('Only compressible hyperelasticity data is '
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'supported here, for simplicity')
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deg = options['solver']['fe_degree']
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Evel = VectorElement('P', mesh.ufl_cell(), deg)
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V = FunctionSpace(mesh, Evel)
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return V
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def measurement_function_spaces(options):
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''' Create function space for measurements, as specified in
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options.
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Args:
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options (dict): Options dictionary (from input file)
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Returns:
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list((Vector)FunctionSpace): list of function spaces on measurement
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mesh, scalar if measurements are scalar, else VectorFunctionSpace
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list(VectorFunctionSpace): if scalar measurements, a list of
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corresponding VectorFunctionSpace for interpolation, else empty
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list
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'''
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measurement_lst = options['estimation']['measurements']
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if not isinstance(measurement_lst, list):
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measurement_lst = [measurement_lst]
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meshes = [meas['mesh'] for meas in measurement_lst]
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if 'fe_degree' in options['estimation']['measurements'][0]:
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degree = options['estimation']['measurements'][0]['fe_degree']
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else:
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degree = 1
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for measurement in measurement_lst[1:]:
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if not degree == measurement['fe_degree']:
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raise Exception('fe_degree must the the same for all '
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'measurements!')
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if degree in (1, 2):
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element_family = 'P'
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elif degree == 0:
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element_family = 'DG'
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else:
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raise Exception('Unsupported measurement FE degree: {}'
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.format(degree))
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scalar = [False]*len(measurement_lst)
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for i, measurement in enumerate(measurement_lst):
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if 'velocity_direction' in measurement:
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direction = measurement['velocity_direction']
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if direction and None not in direction and sum(direction) > 0:
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scalar[i] = True
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V = []
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V_aux = []
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for scal, file in zip(scalar, meshes):
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mesh, _, _ = inout.read_mesh(file)
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if scal:
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V.append(FunctionSpace(mesh, element_family, degree))
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# 1. interpolate velocity vector onto measurement grid (V_aux)
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# 2. perform component projection in the measurement space
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# ---> need to store both scalar and vector spaces
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V_aux.append(VectorFunctionSpace(mesh, element_family, degree))
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else:
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V.append(VectorFunctionSpace(mesh, element_family, degree))
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return V, V_aux
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def find_checkpoints(options):
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''' Find all checkpoints of a simulation from configuration in options
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dictionary.
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Args:
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options (dict): Options dictionary (from YAML input file)
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Returns:
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list: List of found checkpoint indices
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list: List of found checkpoint times
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list: List of found checkpoint files
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'''
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if MPI.rank(MPI.comm_world) > 0:
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return
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chkpt_root = options['io']['write_path'] + '/checkpoint/{i}/u.h5'
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indices = options['estimation']['measurements'][0]['indices']
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if not indices:
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path_all = list(Path().glob(chkpt_root.format(i='*')))
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indices = sorted(int(str(s).split('/')[-2]) for s in path_all)
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# dt_meas = options['timemarching']['checkpoint_dt']
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# times = np.concatenate(([options['timemarching']['dt']],
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# dt_meas*np.array(indices[1:])))
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dt = options['timemarching']['dt']
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times = dt*np.array(indices)
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print('indices: \n')
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print('\t', indices)
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print('times: \n')
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print('\t', times)
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files = [chkpt_root.format(i=i) for i in indices]
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# check if all files are found
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for f in files:
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if not Path(f).is_file():
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raise FileNotFoundError(f)
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return indices, times, files
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def generate(options, seed_lst, print_norms=False):
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''' Generate measurements.
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Args:
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options (dict): Options dictionary (from input file)
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seed_lst (list): list of random seeds
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print_norms (bool): switch for printing norms of measurements
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'''
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V = solution_function_space(options)
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ndim = V.mesh().topology().dim()
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u = Function(V)
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V_meas_lst, V_aux_lst = measurement_function_spaces(options)
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u_meas_lst = [Function(V_meas, name='measurement') for V_meas in
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V_meas_lst]
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u_meas_cpy = [Function(V_meas, name='measurement') for V_meas in
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V_meas_lst]
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LI = LagrangeInterpolator
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if V_aux_lst:
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u_aux_lst = [Function(V_aux) for V_aux in V_aux_lst]
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comp_assigner = [FunctionAssigner([V]*ndim, V_aux) for V, V_aux in
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zip(V_meas_lst, V_aux_lst)]
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measurement_lst = options['estimation']['measurements']
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noise_sd = [meas['noise_stddev'] for meas in measurement_lst]
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# if 'project' in options['estimation']['measurements']:
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# project_switch = bool(options['estimation']['measurements']
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# ['project'])
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# else:
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# project_switch = False
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project_switch = False
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indices, times, files = find_checkpoints(options)
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outfile_root_lst = [meas['file_root'] for meas in measurement_lst]
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xdmf_paths = [meas['xdmf_file'] for meas in measurement_lst]
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# don't automatically append seed{s} do path anymore!
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# suppose seed{s} is included
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# if seed_lst[0] > 0:
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# for i, (out, xdmf) in enumerate(zip(outfile_root_lst, xdmf_paths)):
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# # if isinstance(out, str) and 'seed{s}' not in out:
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# # out_ = out.split('/')
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# # outfile_root_lst[i] = '/'.join(out_[:-1] + ['seed{s}',
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# # out_[-1]])
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# if isinstance(xdmf, str) and 'seed{s}' not in xdmf:
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# xdmf_ = xdmf.split('/')
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# xdmf_paths[i] = '/'.join(xdmf_[:-1] + ['seed{s}', xdmf_[-1]])
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# check if a list of seeds is given that {s} is included in path
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if len(seed_lst) > 1:
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for out in outfile_root_lst:
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assert '{s}' in out, ('For a list of seeds, the string \'{s}\' '
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'must be included in the file_root and will '
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'be replaced by the seed number')
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if any(xdmf_paths):
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xdmf_lst = []
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for pth in xdmf_paths:
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if not isinstance(pth, str):
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raise TypeError('xdmf_file setting must be None or a string '
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'indicating the target XDMF file. Got type {}'.
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format(type(pth)))
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seed_dict = {}
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for seed in seed_lst:
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file = XDMFFile(pth.format(s=seed))
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file.parameters['rewrite_function_mesh'] = False
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seed_dict[seed] = file
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xdmf_lst.append(seed_dict)
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else:
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xdmf_lst = [None]*len(u_meas_lst)
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for count, (index, time, infile) in enumerate(zip(indices, times, files)):
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if MPI.rank(MPI.comm_world) == 0:
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print('Processing {} at t = {}'.format(infile, time))
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t_ = inout.read_HDF5_data(u.function_space().mesh().mpi_comm(), infile,
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u, '/u')
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assert np.allclose(time, t_), ('Timestamps do not match! {} vs {} '
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'(HDF5 file)'.format(time, t_))
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# interpolate u to measurement meshes
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for k, (u_meas, outfile_root, xdmf, sd) in enumerate(zip(
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u_meas_lst, outfile_root_lst, xdmf_lst, noise_sd)):
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if project_switch:
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u_meas.assign(project(u, u_meas.function_space()))
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else:
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if V_aux_lst:
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if MPI.rank(MPI.comm_world) == 0:
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print('- Scalar velocity component')
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direction = (options['estimation']['measurements'][k]
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['velocity_direction'])
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if direction.count(0) == 2 and direction.count(1) == 1:
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LI.interpolate(u_meas, u.sub(direction.index(1)))
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else:
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assert u_meas.value_shape() == []
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# normalize projection direction
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direction = np.array(direction, dtype=np.float64)
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direction /= np.sqrt(np.dot(direction, direction))
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if MPI.rank(MPI.comm_world) == 0:
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print('- direction: {}'.format(direction))
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LagrangeInterpolator.interpolate(u_aux_lst[k], u)
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# This is faster than simply Xobs_aux.split(True) !
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u_i = [u_meas] + [u_meas.copy(True) for j in
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range(ndim - 1)]
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comp_assigner[k].assign(u_i, u_aux_lst[k])
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u_meas.vector()[:] *= direction[0]
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for ui, d in zip(u_i[1:], direction[1:]):
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if d:
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u_meas.vector().axpy(d, ui.vector())
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else:
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if MPI.rank(MPI.comm_world) == 0:
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print('- Full velocity vector')
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LI.interpolate(u_meas, u)
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if sd:
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u_meas_cpy[k].assign(u_meas)
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# add noise
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for seed in seed_lst:
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if sd:
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if seed > 0:
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np.random.seed(seed + count)
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if MPI.rank(MPI.comm_world) == 0:
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print('- Add noise with stddev = {}, seed = {}'
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.format(sd, seed + count))
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noise = np.random.normal(0., sd,
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u_meas.vector().local_size())
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u_meas.assign(u_meas_cpy[k])
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u_meas.vector()[:] += noise
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if MPI.rank(MPI.comm_world) == 0:
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if print_norms:
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print('Writing file at t = {}\t |u_m| = {}'.format(
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time, norm(u_meas)))
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else:
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print('Writing file at t = {}\t'.format(time))
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outfile = outfile_root.format(i=index, s=seed)
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inout.write_HDF5_data(
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u_meas.function_space().mesh().mpi_comm(), outfile, u_meas,
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'/u', time)
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if xdmf:
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xdmf[seed].write(u_meas, time)
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# THIS IS OBSOLETE NOW
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# write indices and timesteps
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# write_timestamps(options, indices, times, seed_lst)
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def write_timestamps(options, indices, times, seed_lst):
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''' Write time stamps of measurements to csv file.
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Args:
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options (dict): Options dictionary (from YAML input file)
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indices (list): List of checkpoint indices
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times (list): List of checpoint times
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seed_lst (list): List of random seeds
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'''
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if MPI.rank(MPI.comm_world) > 0:
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return
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warning('timestamps.csv is OBSOLETE!')
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file_root_lst = [meas['file_root'] for meas in options['estimation']
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['measurements']]
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# if seed_lst[0]:
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# for i, out in enumerate(file_root_lst):
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# if isinstance(out, str) and 'seed{s}' not in out:
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# out_ = out.split('/')
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# file_root_lst[i] = '/'.join(out_[:-1]
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# + ['seed{s}', out_[-1]])
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for file_root in file_root_lst:
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for seed in seed_lst:
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path = Path(file_root.format(s=seed, i=-1)).parent
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if seed > 0 and 'seed{s}'.format(s=seed) not in str(path):
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path = path.joinpath('seed{s}'.format(s=seed))
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path = path.joinpath('timestamps.csv')
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print('Writing timestamps to file: {}'.format(path))
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with path.open('w') as file:
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writer = csv.writer(file, delimiter=' ')
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for i, t in zip(indices, times):
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writer.writerow((i, t))
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def copy_inputfile(options, inputfile, seed_lst):
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''' Copy input file of reference solution to measurements directory.
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Args:
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options (dict): Options dictionary (from YAML input file)
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inputfile (str): Path of input file to be copied
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seed_lst (list): List of random seeds
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'''
|
||
|
|
if MPI.rank(MPI.comm_world) > 0:
|
||
|
|
return
|
||
|
|
|
||
|
|
file_root_lst = [meas['file_root'] for meas in options['estimation']
|
||
|
|
['measurements']]
|
||
|
|
for file_root in file_root_lst:
|
||
|
|
for seed in seed_lst:
|
||
|
|
path = Path(file_root.format(s=seed, i=-1)).parent
|
||
|
|
# if seed > 0 and 'seed{s}'.format(s=seed) not in str(path):
|
||
|
|
# path = path.joinpath('seed{s}'.format(s=seed))
|
||
|
|
path = path.joinpath('input.yaml')
|
||
|
|
# path.parent.mkdir(parents=True, exist_ok=True)
|
||
|
|
shutil.copy2(str(inputfile), str(path))
|
||
|
|
print('Copied input file to {}'.format(path))
|
||
|
|
|
||
|
|
|
||
|
|
def dump_example_options(path):
|
||
|
|
''' Dump example options to given path and exit.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
path (str): Path to input file
|
||
|
|
'''
|
||
|
|
example = '''\
|
||
|
|
# example fractional step inputfile for gen_measurements_from_checkpoints.py
|
||
|
|
mesh: './meshes/mesh.h5'
|
||
|
|
|
||
|
|
io:
|
||
|
|
# Path containing checkpoints in a checkpoints/ folder
|
||
|
|
write_path: './results/test/'
|
||
|
|
|
||
|
|
timemarching:
|
||
|
|
# final time of simulation to be processed
|
||
|
|
T: 0.4
|
||
|
|
# simulation time step size (not dt_checkpoint)
|
||
|
|
dt: 0.001
|
||
|
|
|
||
|
|
fem:
|
||
|
|
# Velocity and presse (for monolithic) function spaces of checkpoints
|
||
|
|
velocity_space: 'p1'
|
||
|
|
pressure_space: 'p1'
|
||
|
|
|
||
|
|
estimation:
|
||
|
|
measurements:
|
||
|
|
# List of measurements
|
||
|
|
-
|
||
|
|
# Mesh of 1. measurement set
|
||
|
|
mesh: './measurements/mesh_meas.h5'
|
||
|
|
|
||
|
|
# degree of finite element function space
|
||
|
|
# (1 for linear, 0 for discontinuous piece-wise constant)
|
||
|
|
fe_degree: 0
|
||
|
|
|
||
|
|
# velocity measurement files to be written by this tool
|
||
|
|
# {i} will be replaced by the corresponding index of the checkpoint
|
||
|
|
# if given, {s} may be replaced by the seed number, for instance
|
||
|
|
# path/seed{s}/u{i}.h5
|
||
|
|
file_root: './measurements/u{i}.h5'
|
||
|
|
|
||
|
|
# XDMF file where measurements are optionally stored for
|
||
|
|
# visualization (one file for all time steps)
|
||
|
|
xdmf_file: './measurements/meas.xdmf'
|
||
|
|
|
||
|
|
# Select a velocity component:
|
||
|
|
# * None (~) means "use complete vector"
|
||
|
|
# * else, use a scalar velocity by projecting onto the given
|
||
|
|
# direction vector, [x, y, (z)]
|
||
|
|
velocity_direction: ~
|
||
|
|
|
||
|
|
# (absolute) standard deviation of Gaussian noise
|
||
|
|
noise_stddev: 10.
|
||
|
|
|
||
|
|
# indices of checkpoints to be processed:
|
||
|
|
# * 0 == all
|
||
|
|
# * a list of integes
|
||
|
|
indices: 0
|
||
|
|
|
||
|
|
-
|
||
|
|
# second measurement ...
|
||
|
|
-
|
||
|
|
# further measurements ...
|
||
|
|
'''
|
||
|
|
|
||
|
|
with open(path, 'w') as f:
|
||
|
|
f.write(example)
|
||
|
|
print('Example options:\n\n')
|
||
|
|
print(example)
|
||
|
|
print('\ndumped example options to file: {}'.format(path))
|
||
|
|
sys.exit(0)
|
||
|
|
|
||
|
|
|
||
|
|
def get_parser():
|
||
|
|
parser = argparse.ArgumentParser(description='''\
|
||
|
|
Generate measurements from HDF5 checkpoints, generated by the Fractional-Step
|
||
|
|
or the monolithic Navier-Stokes solvers.
|
||
|
|
|
||
|
|
Reads options from the given input file.
|
||
|
|
|
||
|
|
See the example options for further explanations::
|
||
|
|
(`gen_measurements_from_checkpoints.py -d example.yaml`).
|
||
|
|
''', formatter_class=argparse.RawDescriptionHelpFormatter)
|
||
|
|
parser.add_argument('inputfile', type=str, help='path to yaml input file')
|
||
|
|
# parser.add_argument('-s', '--seed', type=int, default=-1,
|
||
|
|
# help='seed for random generator')
|
||
|
|
parser.add_argument('-s', '--seed', nargs='+', help='seed or list of seeds'
|
||
|
|
' for noise random number generator. '
|
||
|
|
'Will take the given seed for the first time step '
|
||
|
|
'and increment by +1 for all subsequent time steps, '
|
||
|
|
'so that noise is different for all times '
|
||
|
|
'but reproducible', default=[-1], type=int)
|
||
|
|
parser.add_argument('-n', '--print_norms', action='store_true',
|
||
|
|
help='print norms')
|
||
|
|
parser.add_argument('-d', '--dump', action='store_true',
|
||
|
|
help='dump minimal example parameters to inputfile')
|
||
|
|
|
||
|
|
return parser
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
args = get_parser().parse_args()
|
||
|
|
|
||
|
|
if args.dump:
|
||
|
|
dump_example_options(args.inputfile)
|
||
|
|
|
||
|
|
seed = args.seed
|
||
|
|
|
||
|
|
if seed[0] <= 0:
|
||
|
|
assert len(seed) == 1, 'if multiple seeds are given, all should be > 0'
|
||
|
|
|
||
|
|
try:
|
||
|
|
options = inout.read_parameters(args.inputfile)
|
||
|
|
except IOError:
|
||
|
|
raise IOError('File could not be read: {}'.format(args.inputfile))
|
||
|
|
|
||
|
|
generate(options, seed, args.print_norms)
|
||
|
|
|
||
|
|
copy_inputfile(options, args.inputfile, seed)
|