如何在jess中比较java类中的两个变量并执行规则？
如何在jess中比较java类中的两个变量并执行规则？
提问于 2014-06-03 23:19:56
我是初学者。我正在尝试比较来自Jess中Java类的两个变量，并尝试执行一条规则。
我已经从一个名为CurrentSignal的java类导入了cTNumber和measuredCurrent (两者都是整数)。类似地，导入的vTNumber和measuredVoltage形成java类DERSignal。现在我想制定一条规则，如果cTNumber等于vTNumber，那么乘以measuredCurrent和measuredVoltage (两者都是双精度)来计算幂。
我正试着用这种方式...
(import signals.*)
(deftemplate CurrentSignal (declare (from-class CurrentSignal)))
(deftemplate DERSignal (declare (from-class DERSignal)))
(defglobal ?*CTnumber* = 0)
(defglobal ?*VTnumber* = 0)
(defglobal ?*VTnumberDER* = 0)
(defglobal ?*measuredCurrent* = 0)
(defglobal ?*measuredVoltage* = 0)
(defglobal ?*measuredVoltageDER* = 0)
(defrule Get-CT-Number
(CurrentSignal (cTNumber ?m))
(CurrentSignal (measuredCurrent ?c))
=>
(bind ?*measuredCurrent* ?c)
(printout t "Measured Current : " ?*measuredCurrent*" Amps"crlf)
(bind ?*CTnumber* ?m)
(printout t ?*CTnumber* crlf)
)
(defrule Get-DER-Number
(DERSignal (vTNumber ?o))
(DERSignal (measuredVoltage ?V))
=>
(bind ?*measuredVoltageDER* ?V)
(printout t "Measured Voltage : " ?*measuredVoltageDER* " V" crlf)
(bind ?*VTnumberDER* ?o)
(printout t ?*VTnumberDER* crlf)
)
(defrule Power-Calculation-DER-signal
"Power calculation of DER Bay"
(test (= ?*CTnumber* ?*VTnumberDER* ))
=>
(printout t "Total Generation : " (* ?*measuredCurrent* ?*measuredVoltageDER*) crlf)
)但总世代显示为0。但是我试着用Java计算，结果显示了一个数字。有人能帮我解决这个问题吗？谢谢。
回答 1
Stack Overflow用户
发布于 2014-06-04 00:14:23
为什么你不在一条规则中做所有的事情呢？
(defrule Power-Calculation-DER-signal
(CurrentSignal (cTNumber ?m)(measuredCurrent ?c))
(DERSignal {vTNumber == ?m} (measuredVoltage ?V))
=>
(printout t "Total Generation : " (* ?c ?V) crlf)
)更改不会影响规则。有关全局变量，请参阅Jess手册。
后来添加了的
(reset)
(deftemplate CurrentSignal (slot cTNumber)(slot measuredCurrent))
(deftemplate DERSignal (slot vTNumber)(slot measuredVoltage))
(assert (CurrentSignal (cTNumber 12)(measuredCurrent 10)))
(assert (DERSignal (vTNumber 12) (measuredVoltage 13)))
(defrule Power-Calculation-DER-signal
(CurrentSignal (cTNumber ?m)(measuredCurrent ?c))
(DERSignal {vTNumber == ?m} (measuredVoltage ?V))
=>
(printout t "Total Generation : " (* ?c ?V) crlf)
)
(run)
Jess> (batch voltage.clp )
Total Generation : 130
1页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/24018922
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