MOAB: Mesh Oriented datABase  (version 5.4.1)
MBMesquite::TQualityMetric Class Reference

Compare targets to mapping function Jacobian matrices. More...

#include <TQualityMetric.hpp>

+ Inheritance diagram for MBMesquite::TQualityMetric:
+ Collaboration diagram for MBMesquite::TQualityMetric:

Public Types

typedef TMetric MetricType

Public Member Functions

 TQualityMetric (TargetCalculator *tc, WeightCalculator *wc, TMetric *target_metric)
 TQualityMetric (TargetCalculator *tc, TMetric *target_metric)
virtual MESQUITE_EXPORT std::string get_name () const
virtual MESQUITE_EXPORT bool evaluate_with_gradient (PatchData &pd, size_t handle, double &value, std::vector< size_t > &indices, std::vector< Vector3D > &gradient, MsqError &err)
 Get metric value and gradient at a logical location in the patch.
virtual MESQUITE_EXPORT bool evaluate_with_Hessian_diagonal (PatchData &pd, size_t handle, double &value, std::vector< size_t > &indices, std::vector< Vector3D > &gradient, std::vector< SymMatrix3D > &Hessian_diagonal, MsqError &err)
 Get metric value and gradient at a logical location in the patch.
virtual MESQUITE_EXPORT bool evaluate_with_Hessian (PatchData &pd, size_t handle, double &value, std::vector< size_t > &indices, std::vector< Vector3D > &gradient, std::vector< Matrix3D > &Hessian, MsqError &err)
 Get metric value and deravitives at a logical location in the patch.
TMetricget_target_metric () const
void set_target_metric (TMetric *m)

Protected Member Functions

virtual MESQUITE_EXPORT bool evaluate_internal (PatchData &pd, size_t handle, double &value, size_t *indices, size_t &num_indices, MsqError &err)

Private Attributes

TMetrictargetMetric

Detailed Description

Compare targets to mapping function Jacobian matrices.

A quality metric defined using 2D and 3D target metrics, where the active (A) matrix compared to the target by the underlying metrics is the Jacobian matrix of the mapping function at a given sample point. For surface elements, A is rotated to align the normal with W, such that both matrices can be reduced from 3x2 to 2x2.

Definition at line 53 of file TQualityMetric.hpp.


Member Typedef Documentation

Used in tests and other templatized code

Reimplemented from MBMesquite::QualityMetric.

Definition at line 57 of file TQualityMetric.hpp.


Constructor & Destructor Documentation

MBMesquite::TQualityMetric::TQualityMetric ( TargetCalculator tc,
WeightCalculator wc,
TMetric target_metric 
) [inline]
Parameters:
tcThe target calculator
wcThe weight calculator
target_metricThe target metric

Definition at line 64 of file TQualityMetric.hpp.

        : TMPQualityMetric( tc, wc ), targetMetric( target_metric )
    {
    }
MBMesquite::TQualityMetric::TQualityMetric ( TargetCalculator tc,
TMetric target_metric 
) [inline]
Parameters:
tcThe target calculator
target_metricThe target metric

Definition at line 73 of file TQualityMetric.hpp.

        : TMPQualityMetric( tc, 0 ), targetMetric( target_metric )
    {
    }

Member Function Documentation

bool MBMesquite::TQualityMetric::evaluate_internal ( PatchData pd,
size_t  handle,
double &  value,
size_t *  indices,
size_t &  num_indices,
MsqError err 
) [protected, virtual]

Implements MBMesquite::TMPQualityMetric.

Definition at line 66 of file TQualityMetric.cpp.

References MBMesquite::ElemSampleQM::elem(), MBMesquite::PatchData::element_by_index(), MBMesquite::TMetric::evaluate(), MBMesquite::TMPQualityMetric::evaluate_surface_common(), MBMesquite::TargetCalculator::get_3D_target(), MBMesquite::MsqMeshEntity::get_element_type(), MBMesquite::PatchData::get_mapping_function_3D(), MBMesquite::inverse(), MBMesquite::MappingFunction3D::jacobian(), MBMesquite::TMPQualityMetric::mDerivs2D, MBMesquite::TMPQualityMetric::mDerivs3D, MSQ_CHKERR, MSQ_ERRZERO, MSQ_SETERR, MBMesquite::PatchData::non_slave_node_set(), MBMesquite::ElemSampleQM::sample(), T, MBMesquite::TMPQualityMetric::targetCalc, targetMetric, and MBMesquite::MsqError::UNSUPPORTED_ELEMENT.

{
    const Sample s        = ElemSampleQM::sample( p_handle );
    const size_t e        = ElemSampleQM::elem( p_handle );
    MsqMeshEntity& p_elem = pd.element_by_index( e );
    EntityTopology type   = p_elem.get_element_type();
    unsigned edim         = TopologyInfo::dimension( type );
    const NodeSet bits    = pd.non_slave_node_set( e );

    bool rval;
    if( edim == 3 )
    {  // 3x3 or 3x2 targets ?
        const MappingFunction3D* mf = pd.get_mapping_function_3D( type );
        if( !mf )
        {
            MSQ_SETERR( err )
            ( "No mapping function for element type", MsqError::UNSUPPORTED_ELEMENT );
            return false;
        }

        MsqMatrix< 3, 3 > A, W;
        mf->jacobian( pd, e, bits, s, indices, mDerivs3D, num_indices, A, err );
        MSQ_ERRZERO( err );
        targetCalc->get_3D_target( pd, e, s, W, err );
        MSQ_ERRZERO( err );
        const MsqMatrix< 3, 3 > Winv = inverse( W );
        const MsqMatrix< 3, 3 > T    = A * Winv;
        rval                         = targetMetric->evaluate( T, value, err );
        MSQ_ERRZERO( err );
#ifdef PRINT_INFO
        print_info< 3 >( e, s, A, W, A * inverse( W ) );
#endif
    }
    else if( edim == 2 )
    {
        MsqMatrix< 2, 2 > W, A;
        MsqMatrix< 3, 2 > S_a_transpose_Theta;
        rval =
            evaluate_surface_common( pd, s, e, bits, indices, num_indices, mDerivs2D, W, A, S_a_transpose_Theta, err );
        if( MSQ_CHKERR( err ) || !rval ) return false;
        const MsqMatrix< 2, 2 > Winv = inverse( W );
        const MsqMatrix< 2, 2 > T    = A * Winv;
        rval                         = targetMetric->evaluate( T, value, err );
        MSQ_ERRZERO( err );

#ifdef PRINT_INFO
        print_info< 2 >( e, s, J, Wp, A * inverse( W ) );
#endif
    }
    else
    {
        assert( false );
        return false;
    }

    return rval;
}
bool MBMesquite::TQualityMetric::evaluate_with_gradient ( PatchData pd,
size_t  handle,
double &  value,
std::vector< size_t > &  indices,
std::vector< Vector3D > &  gradient,
MsqError err 
) [virtual]

Get metric value and gradient at a logical location in the patch.

Evaluate the metric at one location in the PatchData.

Parameters:
pdThe patch.
handleThe location in the patch (as passed back from get_evaluations).
valueThe output metric value.
indicesThe free vertices that the evaluation is a function of, specified as vertex indices in the PatchData.
gradientThe gradient of the metric as a function of the coordinates of the free vertices passed back in the indices list.

Reimplemented from MBMesquite::QualityMetric.

Definition at line 129 of file TQualityMetric.cpp.

References MBMesquite::arrptr(), MBMesquite::ElemSampleQM::elem(), MBMesquite::PatchData::element_by_index(), MBMesquite::TMPQualityMetric::evaluate_surface_common(), MBMesquite::TMetric::evaluate_with_grad(), MBMesquite::TargetCalculator::get_3D_target(), MBMesquite::MsqMeshEntity::get_element_type(), MBMesquite::PatchData::get_mapping_function_3D(), MBMesquite::grad(), MBMesquite::inverse(), MBMesquite::MappingFunction3D::jacobian(), MBMesquite::TMPQualityMetric::mDerivs2D, MBMesquite::TMPQualityMetric::mDerivs3D, MBMesquite::TMPQualityMetric::mIndices, MSQ_CHKERR, MSQ_ERRZERO, MSQ_SETERR, MBMesquite::PatchData::non_slave_node_set(), MBMesquite::ElemSampleQM::sample(), T, MBMesquite::TMPQualityMetric::targetCalc, targetMetric, MBMesquite::transpose(), MBMesquite::MsqError::UNSUPPORTED_ELEMENT, and MBMesquite::TMPQualityMetric::weight().

Referenced by TQualityMetricTest::regression_inverse_mean_ratio_grad().

{
    const Sample s        = ElemSampleQM::sample( p_handle );
    const size_t e        = ElemSampleQM::elem( p_handle );
    MsqMeshEntity& p_elem = pd.element_by_index( e );
    EntityTopology type   = p_elem.get_element_type();
    unsigned edim         = TopologyInfo::dimension( type );
    size_t num_idx        = 0;
    const NodeSet bits    = pd.non_slave_node_set( e );

    bool rval;
    if( edim == 3 )
    {  // 3x3 or 3x2 targets ?
        const MappingFunction3D* mf = pd.get_mapping_function_3D( type );
        if( !mf )
        {
            MSQ_SETERR( err )
            ( "No mapping function for element type", MsqError::UNSUPPORTED_ELEMENT );
            return false;
        }

        MsqMatrix< 3, 3 > A, W, dmdT;
        mf->jacobian( pd, e, bits, s, mIndices, mDerivs3D, num_idx, A, err );
        MSQ_ERRZERO( err );
        targetCalc->get_3D_target( pd, e, s, W, err );
        MSQ_ERRZERO( err );
        const MsqMatrix< 3, 3 > Winv = inverse( W );
        const MsqMatrix< 3, 3 > T    = A * Winv;
        rval                         = targetMetric->evaluate_with_grad( T, value, dmdT, err );
        MSQ_ERRZERO( err );
        gradient< 3 >( num_idx, mDerivs3D, dmdT * transpose( Winv ), grad );
#ifdef PRINT_INFO
        print_info< 3 >( e, s, A, W, A * inverse( W ) );
#endif
    }
    else if( edim == 2 )
    {
        MsqMatrix< 2, 2 > W, A, dmdT;
        MsqMatrix< 3, 2 > S_a_transpose_Theta;
        rval = evaluate_surface_common( pd, s, e, bits, mIndices, num_idx, mDerivs2D, W, A, S_a_transpose_Theta, err );
        if( MSQ_CHKERR( err ) || !rval ) return false;
        const MsqMatrix< 2, 2 > Winv = inverse( W );
        const MsqMatrix< 2, 2 > T    = A * Winv;
        rval                         = targetMetric->evaluate_with_grad( T, value, dmdT, err );
        MSQ_ERRZERO( err );
        gradient< 2 >( num_idx, mDerivs2D, S_a_transpose_Theta * dmdT * transpose( Winv ), grad );
#ifdef PRINT_INFO
        print_info< 2 >( e, s, J, Wp, A * inverse( W ) );
#endif
    }
    else
    {
        assert( false );
        return false;
    }

    // pass back index list
    indices.resize( num_idx );
    std::copy( mIndices, mIndices + num_idx, indices.begin() );

    // apply target weight to value
    weight( pd, s, e, num_idx, value, grad.empty() ? 0 : arrptr( grad ), 0, 0, err );
    MSQ_ERRZERO( err );
    return rval;
}
bool MBMesquite::TQualityMetric::evaluate_with_Hessian ( PatchData pd,
size_t  handle,
double &  value,
std::vector< size_t > &  indices,
std::vector< Vector3D > &  gradient,
std::vector< Matrix3D > &  Hessian,
MsqError err 
) [virtual]

Get metric value and deravitives at a logical location in the patch.

Evaluate the metric at one location in the PatchData.

Parameters:
pdThe patch.
handleThe location in the patch (as passed back from get_evaluations).
valueThe output metric value.
indicesThe free vertices that the evaluation is a function of, specified as vertex indices in the PatchData.
gradientThe gradient of the metric as a function of the coordinates of the free vertices passed back in the indices list.
HessianThe Hessian of the metric as a function of the coordinates. The Hessian is passed back as the upper-triangular portion of the matrix in row-major order, where each Matrix3D is the portion of the Hessian with respect to the vertices at the corresponding positions in the indices list.

Reimplemented from MBMesquite::QualityMetric.

Definition at line 200 of file TQualityMetric.cpp.

References MBMesquite::arrptr(), MBMesquite::ElemSampleQM::elem(), MBMesquite::PatchData::element_by_index(), MBMesquite::TMPQualityMetric::evaluate_surface_common(), MBMesquite::TMetric::evaluate_with_hess(), MBMesquite::TargetCalculator::get_3D_target(), MBMesquite::MsqMeshEntity::get_element_type(), MBMesquite::PatchData::get_mapping_function_3D(), MBMesquite::grad(), MBMesquite::TMPQualityMetric::hess2d, MBMesquite::inverse(), MBMesquite::MappingFunction3D::jacobian(), MBMesquite::TMPQualityMetric::mDerivs2D, MBMesquite::TMPQualityMetric::mDerivs3D, MBMesquite::TMPQualityMetric::mIndices, MSQ_CHKERR, MSQ_ERRZERO, MSQ_SETERR, n, MBMesquite::PatchData::non_slave_node_set(), MBMesquite::ElemSampleQM::sample(), MBMesquite::second_deriv_wrt_product_factor(), T, MBMesquite::TMPQualityMetric::targetCalc, targetMetric, MBMesquite::transpose(), MBMesquite::MsqError::UNSUPPORTED_ELEMENT, and MBMesquite::TMPQualityMetric::weight().

Referenced by TQualityMetricTest::regression_inverse_mean_ratio_hess().

{
    const Sample s        = ElemSampleQM::sample( p_handle );
    const size_t e        = ElemSampleQM::elem( p_handle );
    MsqMeshEntity& p_elem = pd.element_by_index( e );
    EntityTopology type   = p_elem.get_element_type();
    unsigned edim         = TopologyInfo::dimension( type );
    size_t num_idx        = 0;
    const NodeSet bits    = pd.non_slave_node_set( e );

    bool rval;
    if( edim == 3 )
    {  // 3x3 or 3x2 targets ?
        const MappingFunction3D* mf = pd.get_mapping_function_3D( type );
        if( !mf )
        {
            MSQ_SETERR( err )
            ( "No mapping function for element type", MsqError::UNSUPPORTED_ELEMENT );
            return false;
        }

        MsqMatrix< 3, 3 > A, W, dmdT, d2mdT2[6];
        mf->jacobian( pd, e, bits, s, mIndices, mDerivs3D, num_idx, A, err );
        MSQ_ERRZERO( err );
        targetCalc->get_3D_target( pd, e, s, W, err );
        MSQ_ERRZERO( err );
        const MsqMatrix< 3, 3 > Winv = inverse( W );
        const MsqMatrix< 3, 3 > T    = A * Winv;
        rval                         = targetMetric->evaluate_with_hess( T, value, dmdT, d2mdT2, err );
        MSQ_ERRZERO( err );
        gradient< 3 >( num_idx, mDerivs3D, dmdT * transpose( Winv ), grad );
        second_deriv_wrt_product_factor( d2mdT2, Winv );
        Hessian.resize( num_idx * ( num_idx + 1 ) / 2 );
        if( num_idx ) hessian< 3 >( num_idx, mDerivs3D, d2mdT2, arrptr( Hessian ) );

#ifdef PRINT_INFO
        print_info< 3 >( e, s, A, W, A * inverse( W ) );
#endif
    }
    else if( edim == 2 )
    {
#ifdef NUMERICAL_2D_HESSIAN
        // return finite difference approximation for now

        return QualityMetric::evaluate_with_Hessian( pd, p_handle, value, indices, grad, Hessian, err );
#else
        MsqMatrix< 2, 2 > W, A, dmdT, d2mdT2[3];
        MsqMatrix< 3, 2 > M;
        rval = evaluate_surface_common( pd, s, e, bits, mIndices, num_idx, mDerivs2D, W, A, M, err );
        if( MSQ_CHKERR( err ) || !rval ) return false;
        const MsqMatrix< 2, 2 > Winv = inverse( W );
        const MsqMatrix< 2, 2 > T    = A * Winv;
        rval                         = targetMetric->evaluate_with_hess( T, value, dmdT, d2mdT2, err );
        MSQ_ERRZERO( err );
        gradient< 2 >( num_idx, mDerivs2D, M * dmdT * transpose( Winv ), grad );
        // calculate 2D hessian
        second_deriv_wrt_product_factor( d2mdT2, Winv );
        const size_t n = num_idx * ( num_idx + 1 ) / 2;
        hess2d.resize( n );
        if( n ) hessian< 2 >( num_idx, mDerivs2D, d2mdT2, arrptr( hess2d ) );
        // calculate surface hessian as transform of 2D hessian
        Hessian.resize( n );
        for( size_t i = 0; i < n; ++i )
            Hessian[i] = Matrix3D( ( M * hess2d[i] * transpose( M ) ).data() );
#ifdef PRINT_INFO
        print_info< 2 >( e, s, J, Wp, A * inverse( W ) );
#endif
#endif
    }
    else
    {
        assert( 0 );
        return false;
    }

    // pass back index list
    indices.resize( num_idx );
    std::copy( mIndices, mIndices + num_idx, indices.begin() );

    // apply target weight to value
    if( !num_idx )
        weight( pd, s, e, num_idx, value, 0, 0, 0, err );
    else
        weight( pd, s, e, num_idx, value, arrptr( grad ), 0, arrptr( Hessian ), err );
    MSQ_ERRZERO( err );
    return rval;
}
bool MBMesquite::TQualityMetric::evaluate_with_Hessian_diagonal ( PatchData pd,
size_t  handle,
double &  value,
std::vector< size_t > &  indices,
std::vector< Vector3D > &  gradient,
std::vector< SymMatrix3D > &  Hessian_diagonal,
MsqError err 
) [virtual]

Get metric value and gradient at a logical location in the patch.

Evaluate the metric at one location in the PatchData.

Parameters:
pdThe patch.
handleThe location in the patch (as passed back from get_evaluations).
valueThe output metric value.
indicesThe free vertices that the evaluation is a function of, specified as vertex indices in the PatchData.
gradientThe gradient of the metric as a function of the coordinates of the free vertices passed back in the indices list.
Hessian_diagonalThe 3x3 blocks along the diagonal of the Hessian matrix.

Reimplemented from MBMesquite::QualityMetric.

Definition at line 294 of file TQualityMetric.cpp.

References MBMesquite::arrptr(), MBMesquite::ElemSampleQM::elem(), MBMesquite::PatchData::element_by_index(), MBMesquite::TMPQualityMetric::evaluate_surface_common(), MBMesquite::TMetric::evaluate_with_hess(), MBMesquite::TargetCalculator::get_3D_target(), MBMesquite::MsqMeshEntity::get_element_type(), MBMesquite::PatchData::get_mapping_function_3D(), MBMesquite::grad(), MBMesquite::inverse(), MBMesquite::MappingFunction3D::jacobian(), MBMesquite::TMPQualityMetric::mDerivs2D, MBMesquite::TMPQualityMetric::mDerivs3D, MBMesquite::TMPQualityMetric::mIndices, MSQ_CHKERR, MSQ_ERRZERO, MSQ_SETERR, MBMesquite::PatchData::non_slave_node_set(), MBMesquite::MsqMatrix< R, C >::row(), MBMesquite::ElemSampleQM::sample(), MBMesquite::second_deriv_wrt_product_factor(), T, MBMesquite::TMPQualityMetric::targetCalc, targetMetric, MBMesquite::transpose(), MBMesquite::MsqError::UNSUPPORTED_ELEMENT, and MBMesquite::TMPQualityMetric::weight().

{
    const Sample s        = ElemSampleQM::sample( p_handle );
    const size_t e        = ElemSampleQM::elem( p_handle );
    MsqMeshEntity& p_elem = pd.element_by_index( e );
    EntityTopology type   = p_elem.get_element_type();
    unsigned edim         = TopologyInfo::dimension( type );
    size_t num_idx        = 0;
    const NodeSet bits    = pd.non_slave_node_set( e );

    bool rval;
    if( edim == 3 )
    {  // 3x3 or 3x2 targets ?
        const MappingFunction3D* mf = pd.get_mapping_function_3D( type );
        if( !mf )
        {
            MSQ_SETERR( err )
            ( "No mapping function for element type", MsqError::UNSUPPORTED_ELEMENT );
            return false;
        }

        MsqMatrix< 3, 3 > A, W, dmdT, d2mdT2[6];
        mf->jacobian( pd, e, bits, s, mIndices, mDerivs3D, num_idx, A, err );
        MSQ_ERRZERO( err );
        targetCalc->get_3D_target( pd, e, s, W, err );
        MSQ_ERRZERO( err );
        const MsqMatrix< 3, 3 > Winv = inverse( W );
        const MsqMatrix< 3, 3 > T    = A * Winv;
        rval                         = targetMetric->evaluate_with_hess( T, value, dmdT, d2mdT2, err );
        MSQ_ERRZERO( err );
        gradient< 3 >( num_idx, mDerivs3D, dmdT * transpose( Winv ), grad );
        second_deriv_wrt_product_factor( d2mdT2, Winv );

        diagonal.resize( num_idx );
        hessian_diagonal< 3 >( num_idx, mDerivs3D, d2mdT2, arrptr( diagonal ) );
#ifdef PRINT_INFO
        print_info< 3 >( e, s, A, W, A * inverse( W ) );
#endif
    }
    else if( edim == 2 )
    {
#ifdef NUMERICAL_2D_HESSIAN
        // use finite diference approximation for now
        return QualityMetric::evaluate_with_Hessian_diagonal( pd, p_handle, value, indices, grad, diagonal, err );
#else
        MsqMatrix< 2, 2 > W, A, dmdT, d2mdT2[3];
        MsqMatrix< 3, 2 > M;
        rval = evaluate_surface_common( pd, s, e, bits, mIndices, num_idx, mDerivs2D, W, A, M, err );
        if( MSQ_CHKERR( err ) || !rval ) return false;
        const MsqMatrix< 2, 2 > Winv = inverse( W );
        const MsqMatrix< 2, 2 > T    = A * Winv;
        rval                         = targetMetric->evaluate_with_hess( T, value, dmdT, d2mdT2, err );
        MSQ_ERRZERO( err );
        gradient< 2 >( num_idx, mDerivs2D, M * dmdT * transpose( Winv ), grad );
        second_deriv_wrt_product_factor( d2mdT2, Winv );

        diagonal.resize( num_idx );
        for( size_t i = 0; i < num_idx; ++i )
        {
            MsqMatrix< 2, 2 > block2d;
            block2d( 0, 0 )     = transpose( mDerivs2D[i] ) * d2mdT2[0] * mDerivs2D[i];
            block2d( 0, 1 )     = transpose( mDerivs2D[i] ) * d2mdT2[1] * mDerivs2D[i];
            block2d( 1, 0 )     = block2d( 0, 1 );
            block2d( 1, 1 )     = transpose( mDerivs2D[i] ) * d2mdT2[2] * mDerivs2D[i];
            MsqMatrix< 3, 2 > p = M * block2d;

            SymMatrix3D& H = diagonal[i];
            H[0]           = p.row( 0 ) * transpose( M.row( 0 ) );
            H[1]           = p.row( 0 ) * transpose( M.row( 1 ) );
            H[2]           = p.row( 0 ) * transpose( M.row( 2 ) );
            H[3]           = p.row( 1 ) * transpose( M.row( 1 ) );
            H[4]           = p.row( 1 ) * transpose( M.row( 2 ) );
            H[5]           = p.row( 2 ) * transpose( M.row( 2 ) );
        }
#ifdef PRINT_INFO
        print_info< 2 >( e, s, J, Wp, A * inverse( W ) );
#endif
#endif
    }
    else
    {
        assert( 0 );
        return false;
    }

    // pass back index list
    indices.resize( num_idx );
    std::copy( mIndices, mIndices + num_idx, indices.begin() );

    // apply target weight to value
    if( !num_idx )
        weight( pd, s, e, num_idx, value, 0, 0, 0, err );
    else
        weight( pd, s, e, num_idx, value, arrptr( grad ), arrptr( diagonal ), 0, err );
    MSQ_ERRZERO( err );
    return rval;
}
std::string MBMesquite::TQualityMetric::get_name ( ) const [virtual]

Implements MBMesquite::QualityMetric.

Definition at line 61 of file TQualityMetric.cpp.

References MBMesquite::TMetric::get_name(), and targetMetric.

{
    return targetMetric->get_name();
}

Definition at line 103 of file TQualityMetric.hpp.

References targetMetric.

Referenced by MBMesquite::VertexMover::loop_over_mesh().

    {
        return targetMetric;
    }

Definition at line 107 of file TQualityMetric.hpp.

References targetMetric.

    {
        targetMetric = m;
    }

Member Data Documentation

List of all members.


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