sier2023.nlogo

turtles-own[
  state ;;0表示susceptible，1表示Exposed，2表示infectious，3表示recovered
  initial-xcor ;;turtle的家的位置
  initial-ycor
  exposed-start
  received? ;;是否被收治
  cured? ;;是否被治愈
]

globals[remain-hospital-segregation-area]

to setup
  clear-all
  reset-ticks
  create-turtles population[
    set shape "circle"
    ;;设置初始分布位置
    set initial-xcor (random-xcor * 0.95)
    set initial-ycor (random-ycor * 0.95)
    setxy initial-xcor initial-ycor
    set received? 0
    become-susceptible
  ]
  ask n-of initial-infectious-num turtles[
    become-exposed ;;开局设置潜伏患者
  ]
  set remain-hospital-segregation-area hospital-patient-segregation-area
end

to go
  ask turtles [
    move-turltes ;;外出活动
    spread ;;接触传染
    transform ;;潜伏者转化为感染者
  ]
  received-and-cured ;;收治患者
  tick
end

to received-and-cured
  let current-time ticks
  if current-time >= (receive-cure-response-time + latent-time)[
      ask n-of remain-hospital-segregation-area patches [
      if receive-rate >= random-float 1[ ;;receive-rate影响收治效率
        let agents turtles-here
        if count agents > 0[
          ask one-of agents[
            if state = 2 and received? = 0 [
              ;;判断医院是否还有剩余床位
                if remain-hospital-segregation-area > 0 [
                  set remain-hospital-segregation-area (remain-hospital-segregation-area - 1)
                  set received? 1 ;;收治感染者
                  recovery
               ]
            ]
          ]
        ]
       ]
      ]

    let has-infected-not-cure turtles with [state = 2 and received? = 1 and cured? = 0]
    let num count has-infected-not-cure
    ;;num是未治愈患者数量
    if num > 0 [
      ask has-infected-not-cure [
        recovery  ;;继续治疗
      ]
    ]
  ]
end

to move-turltes
  ifelse human-flow-range = 0[
    fd 0 ;;不移动
  ][
  ;;根据human-flow-range值设置活动范围
  if random-float 1 < 0.2[
    set heading random 360
  ]
  ifelse (distancexy initial-xcor initial-ycor) < human-flow-range
  [
    fd 1
  ][
    facexy initial-xcor initial-ycor ;;让turtle朝向家的位置
    fd 1
    ]
  ]
end

to spread
  let touch-agents other turtles-here ;;接触其他人列表
  if count touch-agents >= 1[
    if (state = 1 or state = 2) and received? = 0 [ ;;潜伏者和感染者都具备感染性,被隔离的患者不再感染他人
      ask touch-agents with [state = 0][infect-turtles]
    ]
  ]
end

to transform
  if state = 1[
    let current-ticks ticks
    if current-ticks - exposed-start >= latent-time[
      if transform-rate >= random-float 1 [become-infected]
    ]
  ]
end

to recovery
  if state = 2 and recovery-rate >= random-float 1 [
    become-recovered
  ]
end

to infect-turtles
  if infection-rate >= random-float 1[
    become-exposed
  ]
end

to become-susceptible
  set state 0
  set color green
end

to become-exposed
  set state 1
  set color yellow
  set exposed-start ticks
end

to become-infected
  set state 2
  set color red
  set cured? 0
end

to become-recovered
  set state 3
  set color blue
  set cured? 1
end
@#$#@#$#@
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OBSERVER
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population
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SLIDER
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receive-cure-response-time
receive-cure-response-time
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MONITOR
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susceptible(%)
count turtles with [state = 0] / population
17
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MONITOR
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exposed(%)
count turtles with [state = 1] / population
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MONITOR
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infectious(%)
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MONITOR
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recoverd(%)
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MONITOR
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remain-hospital-segregation-area
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PLOT
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SEIR
ticks
population-num
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true
true
"" ""
PENS
"susceptible" 1.0 0 -10899396 true "" "plot count turtles with [state = 0]"
"exposed" 1.0 0 -1184463 true "" "plot count turtles with [state = 1]"
"infectious" 1.0 0 -2674135 true "" "plot count turtles with [state = 2]"
"recoverd" 1.0 0 -13345367 true "" "plot count turtles with [state = 3]"

SLIDER
7
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receive-rate
receive-rate
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HORIZONTAL

@#$#@#$#@
## WHAT IS IT?

(a general understanding of what the model is trying to show or explain)

## HOW IT WORKS

(what rules the agents use to create the overall behavior of the model)

## HOW TO USE IT

(how to use the model, including a description of each of the items in the Interface tab)

## THINGS TO NOTICE

(suggested things for the user to notice while running the model)

## THINGS TO TRY

(suggested things for the user to try to do (move sliders, switches, etc.) with the model)

## EXTENDING THE MODEL

(suggested things to add or change in the Code tab to make the model more complicated, detailed, accurate, etc.)

## NETLOGO FEATURES

(interesting or unusual features of NetLogo that the model uses, particularly in the Code tab; or where workarounds were needed for missing features)

## RELATED MODELS

(models in the NetLogo Models Library and elsewhere which are of related interest)

## CREDITS AND REFERENCES

(a reference to the model's URL on the web if it has one, as well as any other necessary credits, citations, and links)
@#$#@#$#@
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@#$#@#$#@
NetLogo 6.1.1
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default
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0
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