一篇外文文献，介绍了大视场鱼眼镜头的畸变校正方法，并有实际测试精度-Calibration of a fi sh eye lens with field view larger than 180

一种计及不完备信息的电力系统抑制弧Petri网故障诊断改进模型，保证在出现保护、断路器发生误动、拒动或者警报信息出现丢失、畸变等异常情况时的故障诊断结果的准确性-An account of incomplete information systems inhibit electrical arc Petri nets improved fault diagnosis model, to ensure that in the event of the protection circuit brea