branch

Class

class Branch

Branch class for the BRC algorithm.

Parameters:

• down (dict) – Given a branch, the lower bound on component states.

• up (dict) – The upper bound on component states.

• down_state (str of either 's' for survival, 'f' for failure, and 'u' for unknown.) – The system state corresponding to down.

• up_state (str of either 's', 'f', and 'u'.) – The system state corresponding to up.

• p (float) – The probability of the branch.

Methods

Branch.get_compat_rules(self, rules)

Get the compatible rules for the branch.

param rules:

Dictionary of rules.

type rules:

Dict with keys ‘s’ and ‘f’, each with a list of survival and failure rules, respectively.

return:

Compatible rules.

rtype:

Dict with keys ‘s’ and ‘f’, each with a list of survival and failure rules, respectively.

get_cmat(branches, comp_varis)

Get the event matrix corresponding to the branches.

param branches:

List of branches.

type branches:

list of Branch

param comp_varis:

List of component variables.

type comp_varis:

list of Variable

return:

Event matrix.

rtype:

2D np.array

get_crow(br1, comp_varis)

Get the row of the event matrix corresponding to a branch.

param br1:

Branch.

type br1:

Branch

param comp_varis:

List of component variables.

type comp_varis:

list of Variable

return:

Row of the event matrix.

rtype:

1D np.array