网络扩散模型中3个节点之间的条件流netlogo编码

Question

我想在netlogo中的节点之间创建条件流。使用扩散模型中的代码，我试图设置如果乌龟1的值大于x（例如1），来自乌龟1的当前流量将停止流入乌龟2.任何帮助都非常感激。

这是我目前的代码。

`directed-link-breed [active-links active-link]
undirected-link-breed [inactive-links inactive-link]

turtles-own [ val new-val ] ; a node's past and current quantity, represented as size
links-own [ current-flow ]  ; the amount of quantity that has passed through a link
                            ; in a given step

globals [
  total-val                 ; total quantity in the system
  max-val                   ; maximum quantity held by a single node in the system
  max-flow                  ; maximum quantity that has passed through a link in the system
  mean-flow                 ; average quantity that is passing through an arbitrary
                            ; link in the system
]

;;;;;;;;;;;;;;;;;;;;;;;;
;;; Setup Procedures ;;;
;;;;;;;;;;;;;;;;;;;;;;;;

to setup
  clear-all
   set-default-shape turtles "circle"

  create-turtles 3 [set color blue]

  ask turtle 0 [setxy -11 16]
  ask turtle 1 [setxy -12 8]
  ask turtle 2 [setxy -9 12]


 ask turtle 0 [
    set val 1
    create-active-link-to turtle 2
    [set current-flow 1]
  ]



  ask turtle 1 [
    set val 1
    create-active-link-to turtle 2
  [set current-flow 1]
]

 ask turtle 2 [
    set val 1
    create-active-link-to turtle 0
  [set current-flow 1]
]

 ask turtle 2[
    set val 1
    create-active-link-to turtle 1
  [set current-flow 1]
]

  update-globals
  update-visuals
  reset-ticks
end

;;;;;;;;;;;;;;;;;;;;;;;
;;; Main Procedure  ;;;
;;;;;;;;;;;;;;;;;;;;;;;

to go
  ask turtles [ set new-val 0 ]
  ask turtles [
    let recipients out-active-link-neighbors
    ifelse any? recipients [
      let val-to-keep val * (1 - diffusion-rate / 100)
      ; we keep some amount of our value from one turn to the next
      set new-val new-val + val-to-keep
      ; What we don't keep for ourselves, we divide evenly among our out-link-neighbors.
      let val-increment ((val - val-to-keep) / count recipients)
      ask recipients [
        set new-val new-val + val-increment
        ask in-active-link-from myself [ set current-flow val-increment ]
      ]
    ] [
      set new-val new-val + val
    ]
  ]
  ask turtles [ set val new-val ]

  update-globals
  update-visuals
  tick
end



;;;;;;;;;;;;;;;;;;;;;;;
;;;     Updates     ;;;
;;;;;;;;;;;;;;;;;;;;;;;

to update-globals
  set total-val sum [ val ] of turtles
  set max-val max [ val ] of turtles
  if any? active-links [
    set max-flow max [current-flow] of active-links
    set mean-flow mean [current-flow] of active-links
  ]
end

to update-visuals
  ask turtles [ update-node-appearance ]
  ask active-links [ update-link-appearance ]
end

to update-node-appearance ; node procedure
  ; scale the size to be between 0.1 and 5.0
  set size 0.1 + 5 * sqrt (val / total-val)
end

to update-link-appearance ; link procedure
  ; scale color to be brighter when more value is flowing through it
  set color scale-color gray (current-flow / (2 * mean-flow + 0.00001)) -0.4 1
end
`