def __init__(self, id_, name, U0, Um, Sigma, Lambda, Xi, time_window, min_duration):
''' U0 is the baseline utility level of acivity.
Um is the maximum utility of activity.
Sigma determines the slope or steepness of the curve.
Lambda determines the relative position of the inflection point.
Xi determines the time of day at which the marginal utility reaches the maximum.
time_window is the interval of starting time for this activity (a 2-tuple).
min_duration is the minimum duration for this activity.
'''
# activity name
self.id, self.name = id_, name
# utility function parameters
self.U0, self.Um, self.Sigma, self.Lambda, self.Xi = U0, Um, Sigma, Lambda, Xi
# temproal constraints
self.time_window = (Time.min2tick(time_window[0]), Time.min2tick(time_window[1]))
self.min_duration = Time.min2tick(min_duration)
def __init__(self, id_, name, U0, Um, Sigma, Lambda, Xi, time_window,
min_duration):
''' U0 is the baseline utility level of acivity.
Um is the maximum utility of activity.
Sigma determines the slope or steepness of the curve.
Lambda determines the relative position of the inflection point.
Xi determines the time of day at which the marginal utility reaches the maximum.
time_window is the interval of starting time for this activity (a 2-tuple).
min_duration is the minimum duration for this activity.
'''
# activity name
self.id, self.name = id_, name
# utility function parameters
self.U0, self.Um, self.Sigma, self.Lambda, self.Xi = U0, Um, Sigma, Lambda, Xi
# temproal constraints
self.time_window = (Time.min2tick(time_window[0]),
Time.min2tick(time_window[1]))
self.min_duration = Time.min2tick(min_duration)
def calc_travel_time(self, flow):
if flow > self.capacity * 8:
print "%s: %s / %s" % (self, flow, self.capacity)
# raise PendingDeprecationWarning('Sidewalk capacity excess (8x)! ')
travel_time = Time.min2tick(self.walk_time*(1.0 + .15*math.pow(flow/self.capacity, 4.0)))
return travel_time
def calc_travel_time(self, flow):
if flow / self.capacity > 4.0:
print " !! %s: %s / %s > 4.0" % (self, flow, self.capacity)
# raise PendingDeprecationWarning('Street capacity excess (20x)! ')
travel_time = Time.min2tick(self.drive_time*(1.0 + .15*math.pow(flow/self.capacity, 4.0)))
return travel_time
def calc_travel_time(self, flow):
if flow > self.capacity * 8:
print "%s: %s / %s" % (self, flow, self.capacity)
# raise PendingDeprecationWarning('Sidewalk capacity excess (8x)! ')
travel_time = Time.min2tick(self.walk_time * (1.0 + 0.15 * math.pow(flow / self.capacity, 4.0)))
return travel_time
def calc_travel_time(self, flow):
if flow / self.capacity > 4.0:
print " !! %s: %s / %s > 4.0" % (self, flow, self.capacity)
# raise PendingDeprecationWarning('Street capacity excess (20x)! ')
travel_time = Time.min2tick(self.drive_time * (1.0 + 0.15 * math.pow(flow / self.capacity, 4.0)))
return travel_time