Initialization

Contents:

• Initialization: Changes to the systems state prior to any simulation.

• Definition: Syntax for the definition of initialization

• Examples

Introduction

Synopsis

Initialization: Changes to the systems state prior to any simulation.

In oder to specify the state of the system (nodes \(N\) and/or edges \(E\) attributes) EpiHiper uses user defined initialization. An initialization is a user defined Action Ensemble applied to a target Sets (nodes \(N\) and/or edges \(E\)) of the Contact Network. Note, it is possible that the target set may be empty. In that case only action specified under once in the Action Ensemble are applied.

Definition

Synopsis

Definition: Syntax for the definition of initialization

intervention: target actionEnsemble [annotation]
target:       setContent [annotation]

Table 13 Initialization definition.

Name	Type	Description
target	object	The Sets (nodes \(N\) and/or edges \(E\)) of the Contact Network
actionEnsemble	object	The Action Ensemble applied to the target set .
ann:*	annotation	Optional annotation of the initialization

Examples

The nodes with ids 3 & 5 are put in the health state \(I\), which is infectious, prior to the simulation.

"sets": [
  {
    "id": "infections",
    "scope": "local",
    "content": {
      "elementType": "node",
      "scope": "local",
      "left": {
        "node": {
          "property": "id"
        }
      },
      "operator": "in",
      "right": {
        "valueList": {
          "id": [
            3, 5
          ]
        }
      }
    }
  }
],
"initializations": [
  {
    "ann:id": "initial_infections",
    "target": {
      "set": {
        "idRef": "infections"
      }
    },
    "foreach": [
      {
        "operations": [
          {
            "target": {
              "node": {
                "property": "healthState"
              }
            },
            "operator": "=",
            "value": {
              "healthState": "I"
            }
          }
        ]
      }
    ]
  }
]