说明：   对于扩展卡尔曼滤波在非线性系统中由于线性化过程引入了线性化误差，从而导致滤波器性能下降甚至发散造成滤波发散的情况
(For the extended Kalman filter to nonlinear systems of linear process because of the introduction of the linearization error, leading to filter divergence of performance degradation and even filter divergence caused by the situation)