fromJSON

Yuka js库的FuzzyModule类的fromJSON方法，用于将JSON格式的模糊控制系统描述转换为FuzzyModule实例。

语法

FuzzyModule.fromJSON(stringifiedJsonDescriptor)

参数

• stringifiedJsonDescriptor：类型为String，是一个JSON格式的模糊控制系统描述字符串。

返回值

返回一个FuzzyModule实例，代表被转换的模糊控制系统。

描述

该方法是FuzzyModule类中的静态方法，用于从JSON字符串中解析描述模糊控制系统的数据，并返回一个相应的FuzzyModule实例。

JSON格式的模糊控制系统描述应包含以下属性：

• variables：所有变量的数组，每个变量应该包含以下属性：
  • name：变量的名称
  • minValue：变量的最小值
  • maxValue：变量的最大值
  • terms：变量的词项，是一个对象，其键为词项名称，值为Term实例的JSON描述
• rules：模糊规则的数组，每个规则应包含以下属性：
  • antecedent：前提条件，是一个对象，由变量名称和一个字符串表示的词项组成，例如：{"humidity": "high", "temperature": "low"}
  • consequent：结论，是由一个变量名称和一个字符串表示的词项组成的对象，例如：{"flow": "medium"}
  • weight：权重，是一个数字，用于调整规则的优先级

JSON格式的Term描述应包含以下属性：

• type：Term的类型，例如：Triangle、LeftShoulder、RightShoulder、Trapezoid、Singleton
• params：描述Term参数的对象，其属性根据Term类型而定

以下是一个示例JSON字符串：

{
  "variables": [
    {
      "name": "humidity",
      "minValue": 0,
      "maxValue": 100,
      "terms": {
        "low": {
          "type": "Triangle",
          "params": {
            "left": 0,
            "top": 25,
            "right": 50
          }
        },
        "medium": {
          "type": "Triangle",
          "params": {
            "left": 25,
            "top": 50,
            "right": 75
          }
        },
        "high": {
          "type": "Triangle",
          "params": {
            "left": 50,
            "top": 75,
            "right": 100
          }
        }
      }
    },
    {
      "name": "temperature",
      "minValue": 10,
      "maxValue": 40,
      "terms": {
        "low": {
          "type": "Triangle",
          "params": {
            "left": 10,
            "top": 15,
            "right": 20
          }
        },
        "medium": {
          "type": "Triangle",
          "params": {
            "left": 15,
            "top": 25,
            "right": 35
          }
        },
        "high": {
          "type": "Triangle",
          "params": {
            "left": 30,
            "top": 40,
            "right": 40
          }
        }
      }
    },
    {
      "name": "flow",
      "minValue": 0,
      "maxValue": 10,
      "terms": {
        "low": {
          "type": "Triangle",
          "params": {
            "left": 0,
            "top": 3,
            "right": 6
          }
        },
        "medium": {
          "type": "Triangle",
          "params": {
            "left": 3,
            "top": 5,
            "right": 8
          }
        },
        "high": {
          "type": "Triangle",
          "params": {
            "left": 6,
            "top": 10,
            "right": 10
          }
        }
      }
    }
  ],
  "rules": [
    {
      "antecedent": {
        "humidity": "low",
        "temperature": "low"
      },
      "consequent": {
        "flow": "low"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "medium",
        "temperature": "low"
      },
      "consequent": {
        "flow": "medium"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "high",
        "temperature": "low"
      },
      "consequent": {
        "flow": "high"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "low",
        "temperature": "medium"
      },
      "consequent": {
        "flow": "medium"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "medium",
        "temperature": "medium"
      },
      "consequent": {
        "flow": "high"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "high",
        "temperature": "medium"
      },
      "consequent": {
        "flow": "high"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "low",
        "temperature": "high"
      },
      "consequent": {
        "flow": "low"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "medium",
        "temperature": "high"
      },
      "consequent": {
        "flow": "low"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "high",
        "temperature": "high"
      },
      "consequent": {
        "flow": "medium"
      },
      "weight": 1
    }
  ]
}

示例

const jsonDescriptor = `{
  "variables": [
    {
      "name": "humidity",
      "minValue": 0,
      "maxValue": 100,
      "terms": {
        "low": {
          "type": "Triangle",
          "params": {
            "left": 0,
            "top": 25,
            "right": 50
          }
        },
        "medium": {
          "type": "Triangle",
          "params": {
            "left": 25,
            "top": 50,
            "right": 75
          }
        },
        "high": {
          "type": "Triangle",
          "params": {
            "left": 50,
            "top": 75,
            "right": 100
          }
        }
      }
    },
    {
      "name": "temperature",
      "minValue": 10,
      "maxValue": 40,
      "terms": {
        "low": {
          "type": "Triangle",
          "params": {
            "left": 10,
            "top": 15,
            "right": 20
          }
        },
        "medium": {
          "type": "Triangle",
          "params": {
            "left": 15,
            "top": 25,
            "right": 35
          }
        },
        "high": {
          "type": "Triangle",
          "params": {
            "left": 30,
            "top": 40,
            "right": 40
          }
        }
      }
    },
    {
      "name": "flow",
      "minValue": 0,
      "maxValue": 10,
      "terms": {
        "low": {
          "type": "Triangle",
          "params": {
            "left": 0,
            "top": 3,
            "right": 6
          }
        },
        "medium": {
          "type": "Triangle",
          "params": {
            "left": 3,
            "top": 5,
            "right": 8
          }
        },
        "high": {
          "type": "Triangle",
          "params": {
            "left": 6,
            "top": 10,
            "right": 10
          }
        }
      }
    }
  ],
  "rules": [
    {
      "antecedent": {
        "humidity": "low",
        "temperature": "low"
      },
      "consequent": {
        "flow": "low"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "medium",
        "temperature": "low"
      },
      "consequent": {
        "flow": "medium"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "high",
        "temperature": "low"
      },
      "consequent": {
        "flow": "high"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "low",
        "temperature": "medium"
      },
      "consequent": {
        "flow": "medium"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "medium",
        "temperature": "medium"
      },
      "consequent": {
        "flow": "high"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "high",
        "temperature": "medium"
      },
      "consequent": {
        "flow": "high"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "low",
        "temperature": "high"
      },
      "consequent": {
        "flow": "low"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "medium",
        "temperature": "high"
      },
      "consequent": {
        "flow": "low"
      },
      "weight": 1
    },
    {
      "antecedent": {
        "humidity": "high",
        "temperature": "high"
      },
      "consequent": {
        "flow": "medium"
      },
      "weight": 1
    }
  ]
}`

const fuzzyModule = FuzzyModule.fromJSON(jsonDescriptor)

异常

如果给定的JSON字符串无效或描述不完整的模糊控制系统，则可能抛出异常。