我正在使用CPLEX求解器运行我的ILP模型。ILP模型是通过Julia / MultiJuMP实现的。
我想限制问题的优化时间。如果我正在使用OPL，则只需添加cucumber.runtime.CucumberException: You're not allowed to extend classes that define Step Definitions or hooks. class com.example.GoogleCalcStepDefinition extends class com.example.DemoApplicationTests
at cucumber.runtime.java.MethodScanner.validateMethod(MethodScanner.java:76)
at cucumber.runtime.java.MethodScanner.scan(MethodScanner.java:62)
at cucumber.runtime.java.MethodScanner.scan(MethodScanner.java:43)
at cucumber.runtime.java.JavaBackend.loadGlue(JavaBackend.java:83)
at cucumber.runner.Runner.<init>(Runner.java:28)
at cucumber.runner.ThreadLocalRunnerSupplier.createRunner(ThreadLocalRunnerSupplier.java:42)
at cucumber.runner.ThreadLocalRunnerSupplier.access$000(ThreadLocalRunnerSupplier.java:13)
at cucumber.runner.ThreadLocalRunnerSupplier$1.initialValue(ThreadLocalRunnerSupplier.java:22)
at cucumber.runner.ThreadLocalRunnerSupplier$1.initialValue(ThreadLocalRunnerSupplier.java:19)
at java.lang.ThreadLocal.setInitialValue(ThreadLocal.java:180)
at java.lang.ThreadLocal.get(ThreadLocal.java:170)
at cucumber.runner.ThreadLocalRunnerSupplier.get(ThreadLocalRunnerSupplier.java:38)
at cucumber.api.junit.Cucumber.<init>(Cucumber.java:106)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:104)
at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:86)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:49)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Process finished with exit code -1
在Julia中，我输入了以下代码：
Cplex.tilimt=100它不起作用。
答案 0 :(得分：1)
从https://github.com/JuliaOpt/CPLEX.jl/blob/master/README.md的最后一节开始，Julia似乎使用了在CPLEX的C API中显示的旧参数名称。例如，CplexSolver(CPX_PARAM_EPINT=1e-8)。
以下是该参数的CPLEX文档的链接：https://www.ibm.com/support/knowledgecenter/SSSA5P_12.9.0/ilog.odms.cplex.help/CPLEX/Parameters/topics/EpInt.html。如您所见，该名称显示为“ V12.6.0之前的名称”列中的第一行。
对于时间限制，您应该使用CPX_PARAM_TILIM，因为这是https://www.ibm.com/support/knowledgecenter/SSSA5P_12.9.0/ilog.odms.cplex.help/CPLEX/Parameters/topics/TiLim.html中的名称。