AN OPTIMAL CONTROL TOOL FOR COVID-19
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Solution files
HINTS FOR USERS
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In the current version the time step needs to be 1 (day).
So, (in the "parameters and dimension" page from the bocop interface)
the horizon (final time) and number of steps must be equal.
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About other values of the time step, see the discussion in the
appendix of the paper.
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Note the "Hot start" option ("reuse" at bottom left of optimization
page of the bocop interface).
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In case of difficulties of convergence, we advise to
solve first with a small horizon (e.g. 30 days), and then to
increase the horizon, taking advantage of the hot start option.
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More generally for solving a given problem, it is often efficient
to solve a sequence of problems, starting from one already solved,
with small variations between two successive problems of the
sequence (the homotopy approach).
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Due to the large number of states and coefficients, it can
be useful to have a tool for generating the data, namely
the files problem.def, problems.constants and problem.bounds.
See some resources in the python subdirectory of the bocop root.