emission performance

Rational value forεin EP method;

EP法中参数ε的合理取值

In order to study the 3D static performance of EP solenoid valves in the electro-pneumatic braking system of a passenger train, the 3D FEM model and mathematical model were established according to axisymmetric structural feature.

针对EP阀轴对称的结构特点,建立有限元分析模型。

The definitions of EP matrices and k-EP matrices over quatertion field were introduced,and by using the methods of complex representation of quatertion matrices and companion vector their many main properties weregiven.

给出了四元数矩阵的群逆、列空间、零空间和四元数内积空间等定义,引进了四元数体上的EP阵和k-EP阵的概念,并利用四元数的复表示和友向量的方法得到了它们的许多重要性质。