简介:在解一元二次方程根与系数的各类题中.要有一个前提,就是当一元二次方程的根存在时才有这样的关系.在研究这类题型时必须要考虑一元二次方程的根是否存在,即考虑到判别式△≥0,保证根的存在.现举例如下:
简介:Modelreferenceadaptivecontrolofcontinuous-timesystemswithanunknowninputdead-zone,Modelreferenceadaptivecontrolofnon-linearmultivariablesystemsusinganinteractorstructureestimation,Modelreferenceadaptivecontrolofsynchronousmachinespeedviamodel-updatingconcept,ModelReferenceAdaptiveControlusingDelta-operatorwithNeuralNetworkforPneumaticServoSystem.