A Four-Zone Model and Nonlinear Dynamic Analysis of Solution Multiplicity of Buoyancy Ventilation in Underground Building

Table 3

Criterion for scenario 2 (α is fixed and k is control parameter).

α	k	Realization 1	Realization 2
		No	No
		No	Stable
		No	Stable
		Saddle point of index 2	Stable
		Saddle-focus point of index 2	Stable
		Stable	Stable
		No	No
		No	Stable
		Saddle point of index 2	Stable
		Saddle-focus point of index 2	Stable
		Stable	Stable
		Stable	Saddle-focus point of index 2
		No	No
		No	Stable
		Saddle point of index 2	Stable
		Saddle-focus point of index 2	Stable
		Stable	Stable
		Stable	Saddle-focus point of index 2
		Stable	Saddle point of index 2
		No	Stable
		Saddle point of index 2	Stable
		Saddle-focus point of index 2	Stable
		Stable	Stable
		Stable	Saddle-focus point of index 2
		Stable	Saddle point of index 2
		Stable	No