dsm::FirstOrderDynamics Class Reference

Inheritance diagram for dsm::FirstOrderDynamics:

Public Member Functions
	FirstOrderDynamics (RoadNetwork &graph, bool useCache=false, std::optional< unsigned int > seed=std::nullopt, double alpha=0., std::function< double(const RoadNetwork *, Id, Id)> weightFunction=weight_functions::streetTime, double weightTreshold=60.)
	Construct a new First Order Dynamics object.
void	setAgentSpeed (std::unique_ptr< Agent > const &pAgent) override
	Set the speed of an agent.
void	setSpeedFluctuationSTD (double speedFluctuationSTD)
	Set the standard deviation of the speed fluctuation.
double	streetMeanSpeed (Id streetId) const override
	Get the mean speed of a street in $m/s$.
Measurement< double >	streetMeanSpeed () const override
	Get the mean speed of the streets in $m/s$.
Measurement< double >	streetMeanSpeed (double threshold, bool above) const override
	Get the mean speed of the streets with density above or below a threshold in $m/s$.
Public Member Functions inherited from dsm::RoadDynamics< Delay >
	RoadDynamics (RoadNetwork &graph, bool useCache=false, std::optional< unsigned int > seed=std::nullopt, std::function< double(const RoadNetwork *, Id, Id)> weightFunction=weight_functions::streetTime, double weightTreshold=60.)
	Construct a new RoadDynamics object.
void	setErrorProbability (double errorProbability)
	Set the error probability.
void	setPassageProbability (double passageProbability)
	Set the passage probability.
void	setTransitionMatrix (const SparseMatrix< double > &transitionMatrix)
	Set the transition matrix.
void	setForcePriorities (bool forcePriorities) noexcept
	Set the force priorities flag.
void	setDataUpdatePeriod (Delay dataUpdatePeriod) noexcept
	Set the data update period.
void	setMaxDistance (double const maxDistance)
	Set the maximum distance which a random agent can travel.
void	setMaxTravelTime (Time const maxTravelTime) noexcept
	Set the maximum travel time which a random agent can travel.
void	setDestinationNodes (std::initializer_list< Id > destinationNodes, bool updatePaths=true)
	Set the destination nodes.
void	setDestinationNodes (TContainer const &destinationNodes, bool updatePaths=true)
	Set the destination nodes.
void	updatePaths ()
	Update the paths of the itineraries based on the given weight function.
void	addAgentsUniformly (Size nAgents, std::optional< Id > itineraryId=std::nullopt)
	Add agents uniformly on the road network.
void	addAgentsRandomly (Size nAgents, const TContainer &src_weights, const TContainer &dst_weights, const std::variant< std::monostate, size_t, double > minNodeDistance=std::monostate{})
	Add a set of agents to the simulation.
void	addAgentsRandomly (Size nAgents, const std::variant< std::monostate, size_t, double > minNodeDistance=std::monostate{})
void	addAgent (std::unique_ptr< Agent > agent)
	Add an agent to the simulation.
void	addAgent (TArgs &&... args)
void	addAgents (Size nAgents, TArgs &&... args)
void	addItinerary (TArgs &&... args)
	Add an itinerary.
void	addItinerary (std::unique_ptr< Itinerary > itinerary)
	Add an itinerary.
void	evolve (bool reinsert_agents=false)
	Evolve the simulation.
void	optimizeTrafficLights (double const threshold=0., TrafficLightOptimization optimizationType=TrafficLightOptimization::DOUBLE_TAIL, const std::string &logFile=std::string())
	Optimize the traffic lights by changing the green and red times.
const std::unordered_map< Id, std::unique_ptr< Itinerary > > &	itineraries () const noexcept
	Get the itineraries.
const SparseMatrix< double > &	transitionMatrix () const noexcept
	Get the transition matrix.
const std::vector< std::unique_ptr< Agent > > &	agents () const noexcept
	Get the agents.
size_t	nAgents () const
	Get the number of agents currently in the simulation.
Measurement< double >	meanTravelTime (bool clearData=false)
	Get the mean travel time of the agents in $s$.
Measurement< double >	meanTravelDistance (bool clearData=false)
	Get the mean travel distance of the agents in $m$.
Measurement< double >	meanTravelSpeed (bool clearData=false)
	Get the mean travel speed of the agents in $m/s$.
const std::unordered_map< Id, std::array< unsigned long long, 4 > > &	turnCounts () const noexcept
	Get the turn counts of the agents.
std::unordered_map< Id, std::array< double, 4 > >	turnProbabilities (bool reset=true)
	Get the turn probabilities of the agents.
std::unordered_map< Id, std::array< long, 4 > >	turnMapping () const
Measurement< double >	agentMeanSpeed () const
	Get the mean speed of the agents in $m/s$.
Measurement< double >	streetMeanDensity (bool normalized=false) const
	Get the mean density of the streets in $m^{-1}$.
Measurement< double >	streetMeanFlow () const
	Get the mean flow of the streets in $s^{-1}$.
Measurement< double >	streetMeanFlow (double threshold, bool above) const
	Get the mean flow of the streets in $s^{-1}$.
Measurement< double >	meanSpireInputFlow (bool resetValue=true)
	Get the mean spire input flow of the streets in $s^{-1}$.
Measurement< double >	meanSpireOutputFlow (bool resetValue=true)
	Get the mean spire output flow of the streets in $s^{-1}$.
void	saveStreetDensities (const std::string &filename, bool normalized=true, char const separator=';') const
	Save the street densities in csv format.
void	saveInputStreetCounts (const std::string &filename, bool reset=false, char const separator=';')
	Save the street input counts in csv format.
void	saveOutputStreetCounts (const std::string &filename, bool reset=false, char const separator=';')
	Save the street output counts in csv format.
void	saveTravelSpeeds (const std::string &filename, bool reset=false)
	Save the travel speeds of the agents in csv format.
void	saveMacroscopicObservables (const std::string &filename, char const separator=';')
	Save the main macroscopic observables in csv format.
Public Member Functions inherited from dsm::Dynamics< RoadNetwork >
	Dynamics (RoadNetwork &graph, std::optional< unsigned int > seed=std::nullopt)
	Construct a new Dynamics object.
void	resetTime ()
	Reset the simulation time to 0.
const RoadNetwork &	graph () const
	Get the graph.
Time	time () const
	Get the current simulation time-step.

Additional Inherited Members
Protected Member Functions inherited from dsm::Dynamics< RoadNetwork >
void	m_evolve ()
Protected Attributes inherited from dsm::RoadDynamics< Delay >
std::unordered_map< Id, std::array< unsigned long long, 4 > >	m_turnCounts
std::unordered_map< Id, std::array< long, 4 > >	m_turnMapping
std::unordered_map< Id, std::unordered_map< Direction, double > >	m_queuesAtTrafficLights
tbb::concurrent_vector< std::pair< double, double > >	m_travelDTs
Time	m_previousOptimizationTime
Time	m_previousSpireTime
Protected Attributes inherited from dsm::Dynamics< RoadNetwork >
tbb::task_arena	m_taskArena
Time	m_time
std::mt19937_64	m_generator

Constructor & Destructor Documentation

FirstOrderDynamics()

dsm::FirstOrderDynamics::FirstOrderDynamics ( RoadNetwork & graph, bool useCache = false, std::optional< unsigned int > seed = std::nullopt, double alpha = 0., std::function< double(const RoadNetwork *, Id, Id)> weightFunction = weight_functions::streetTime, double weightTreshold = 60. )

explicit

Construct a new First Order Dynamics object.

Parameters

graph	The graph representing the network
useCache	If true, the cache is used (default is false)
seed	The seed for the random number generator (default is std::nullopt)
alpha	The minimum speed rate (default is 0)

Member Function Documentation

setAgentSpeed()

void dsm::FirstOrderDynamics::setAgentSpeed ( std::unique_ptr< Agent > const & pAgent )

overridevirtual

Set the speed of an agent.

Parameters

agentId

The id of the agent

Exceptions

std::invalid_argument,If

the agent is not found

Implements dsm::RoadDynamics< Delay >.

setSpeedFluctuationSTD()

void dsm::FirstOrderDynamics::setSpeedFluctuationSTD

(

double

speedFluctuationSTD

)

Set the standard deviation of the speed fluctuation.

Parameters

speedFluctuationSTD

The standard deviation of the speed fluctuation

Exceptions

std::invalid_argument,If

the standard deviation is negative

streetMeanSpeed() [1/3]

Measurement< double > dsm::FirstOrderDynamics::streetMeanSpeed ( ) const

overridevirtual

Get the mean speed of the streets in $m/s$.

Returns

Measurement The mean speed of the agents and the standard deviation

Reimplemented from dsm::RoadDynamics< Delay >.

streetMeanSpeed() [2/3]

Measurement< double > dsm::FirstOrderDynamics::streetMeanSpeed ( double threshold, bool above ) const

overridevirtual

Get the mean speed of the streets with density above or below a threshold in $m/s$.

Parameters

threshold	The density threshold to consider
above	If true, the function returns the mean speed of the streets with a density above the threshold, otherwise below

Returns

Measurement The mean speed of the agents and the standard deviation

Reimplemented from dsm::RoadDynamics< Delay >.

streetMeanSpeed() [3/3]

double dsm::FirstOrderDynamics::streetMeanSpeed ( Id streetId ) const

overridevirtual

Get the mean speed of a street in $m/s$.

Returns

double The mean speed of the street or street->maxSpeed() if the street is empty

The mean speed of a street is given by the formula: $v_{\text{mean}} = v_{\text{max}} \left(1 - \frac{\alpha}{2} \left( n - 1\right) \right)$ where $v_{\text{max}}$ is the maximum speed of the street, $\alpha$ is the minimum speed rateo divided by the capacity and $n$ is the number of agents in the street

Reimplemented from dsm::RoadDynamics< Delay >.

---

The documentation for this class was generated from the following file:

• src/dsm/headers/FirstOrderDynamics.hpp