QIF --- .. py:class:: QIF Leaky Integrate-and-Fire neuron with Quadratic term in Vm.Based on Spiking Neuron Models book by Gerstner and Kistler.Rm*Cm * dVm/dt = a0*(Vm-Em)*(Vm-vCritical) + Rm*I .. py:method:: setVCritical (*destination message field*) Assigns field value. .. py:method:: getVCritical (*destination message field*) Requests field value. The requesting Element must provide a handler for the returned value. .. py:method:: setA0 (*destination message field*) Assigns field value. .. py:method:: getA0 (*destination message field*) Requests field value. The requesting Element must provide a handler for the returned value. .. py:attribute:: vCritical double (*value field*) Critical voltage for spike initiation .. py:attribute:: a0 double (*value field*) Parameter in Rm*Cm dVm/dt = a0*(Vm-Em)*(Vm-vCritical) + Rm*I, a0>0