Then , because of the characteristic of complex engineering systems like fighters , such as modeling difficulty , multiplicity work situations , difficulty and expensiveness for test , a new kind of fast fault predictor is designed based on an improved k - nearest neighbor method , which neither need math model of system nor need data for train and knowledge 其次,针对歼击机等复杂工程系统建模困难、工作情况多样、试验困难且代价高昂的特点,提出了一种改进k近邻密度估计方法,设计了一种完全既不需要系统数学模型也不需要故障训练数据和先验知识的实时故障预报器。
He graduated with excellent grades in 1987 , and became a pilot in the air force , fulfilling a long cherished dream . he flew various types of fighter aircraft and rose to squadron leader . with 1 , 350 flight hours , he achieved a high technical competence ; he was ranked a pilot of the first class and was twice awarded third - class merit , in 1992 and 1994 在职期间，曾任中队长、领航主任，驾驶歼击机、强击机等机型，并曾安全飞行一千三百五十小时，技术高超，获评为一级飞行员，一九九二年及九四年，先后两次荣立三等功。
