Train Models

1. Enter a model name.
2. For Training Data, select the created or existing Train Dataset.
3. Select Inputs and Outputs.

   Multiple responses can be selected for training.

4. Select a Training Script.
   Note:

   Options to train using Altair One compute resources will appear when two requirements are met:

   • The project is saved to Altair One Drive.
   • At least one visible compute appliance in Altair One has an installed version of PhysicsAI that is consistent with the edge client version of PhysicsAI.
5. Specify the hyperparameters of the training process, such as the number of epochs or learning rate.
   Tip:

   If desired, transfer learning can also be enabled.

   Transfer learning involves using the knowledge from an existing PhysicsAI model while training a new model. It can be beneficial in cases where too few data points are available for training a new model from scratch. To enable transfer learning, the new PhysicsAI model should have the exact same width, depth, and input features.

   Note:

   You can hover over the hyperparameter names to read their description.

   Hyperparameters will affect the quality of a trained model. The optimal set of hyperparameters will vary from problem to problem. Running experiments to the tune the hyperparameters to maximize model performance is an important last step in a complete PhysicsAI process.

   

   PhysicsAI has three AI methods available for training: Graphical Context Neural Simulator (GCNS), which is the default option, Transformer Neural Simulator (TNS), and Shape Encoding Regressor (SER). For more details, refer to Frequently Asked Questions.

   Tip:

   For meshes which are translated in space, these can be realigned using the Mesh Alignment option during model training.

   

   

   The Model Training dialog opens.

@echo off

SETLOCAL
REM ------------------------------------------------------------------------------
REM Copyright (c) 2021 - 2021 Altair Engineering Inc.  All Rights Reserved
REM Contains trade secrets of Altair Engineering, Inc.  Copyright notice
REM does not imply publication.  Decompilation or disassembly of this
REM software is strictly prohibited.
REM ------------------------------------------------------------------------------

REM ------------------------------------------------------------------------------
REM USER SETTINGS
REM ------------------------------------------------------------------------------

REM HPC Setup
set sess=<<HOST NAME>>
set user=<<USER NAME>>

REM PBS Requests
set pbs_requests=-q a100 -N PhysicsAI_shape  -j oe -l select=1:ncpus=8:mem=257940mb:ngpus=1

REM Windows -> Unix Mapping
set win_map=\\<<SERVER IP>>\data\ds
set unix_map=/data/ds

REM PhysicsAI Installation Settings
set install_loc=<<HW or SL INSTALL LOCATION>>common/eds/bin/linux64/edspy.sh

REM PBS Install Location
set sub_cmd=/altair/pbsworks/pbs/exec/bin/qsub


REM ------------------------------------------------------------------------------
REM SCRIPT START
REM ------------------------------------------------------------------------------
REM Get whole input line
set line=%*


REM Map windows paths to unix
set unixmap=%win_map%=%unix_map%
set unixmap=%unixmap:\=/%
set submit_line=%line:\=/%
setlocal EnableExtensions EnableDelayedExpansion
set submit_line=!submit_line:%unixmap%!
echo %line%


echo ---UNIXMAP---
IF ["%unixmap%"] == [""] GOTO :RUN
setlocal EnableExtensions EnableDelayedExpansion

:RUN
echo ---PLINK SETTINGS---
echo user = %user%
echo sess = %sess%


echo ---PAI-SHAPE SETTINGS--
echo install_loc = %install_loc%
echo submit_line = %submit_line%


REM -----------------
REM Run QSUB
REM -----------------
set qsub_command_string='%install_loc% %submit_line%'

REM Write File for submission
echo plink -batch -load %sess% -l %user% -batch "echo %qsub_command_string% > pai_qsub.txt"
plink -batch  -load %sess% -l %user% -batch "echo %qsub_command_string% > pai_qsub.txt"

REM Submit file
plink -batch  -load %sess% -l %user% -batch "%sub_cmd% %pbs_requests% pai_qsub.txt"
echo plink -batch -load %sess% -l %user% -batch "qsub %pbs_requests% pai_qsub.txt"

ENDLOCAL

#!/bin/tcsh

# ------------------------------------------------------------------------------
# USER SETTINGS
# ------------------------------------------------------------------------------

set pbs_requests="-q a100 -N PhysicsAI_shape  -j oe -l select=1:ncpus=8:mem=250000mb:ngpus=1"
echo ${pbs_requests}

# Hyperworks Install Location
set install_loc="/stage/hw/2024"
echo ${install_loc}


# PBS qsub install location
set sub_cmd="/opt/pbs/bin/qsub"


# ------------------------------------------------------------------------------
# SCRIPT START
# ------------------------------------------------------------------------------

set submit_line="$*"
echo submit_line = ${submit_line}

set edspy=\$'{'install_loc'}'"/altair/common /eds/bin/linux64/edspy.sh"

set qsub_command_string="export INSTALL_LOCATION=${install_loc};export install_loc=${install_loc}; ${edspy} ${submit_line}"
echo qsub_command_string = ${qsub_command_string};


# Write the qsub sumbmission script.
# If your home directory is not seen by the HPC, modify the location to be visible on the HPC or run command via ssh.
echo "${qsub_command_string}" > ~/pai_qsub.txt;

# Submit the qsub sumbmission script.
# If you cannot directly submit to pbs, run this command via ssh.
echo "qsub ${pbs_requests} pai_qsub.txt";
qsub ${pbs_requests} ~/pai_qsub.txt

[
    {
        "label": "Scalar1",
        "type": "vector",
        "data": [
           0.5667
        ]
    },
    {
        "label": "List1",
        "type": "vector",
        "data": [
            0.00000,
            0.58778,
            0.95105,
            0.95105,
            0.58778,
            0.00000
        ]
    }
]