The study mainly includes three substudies. the first is the study of the content of current physics teaching and learning in junior school;
研究主要包括以下三个分研究：研究一，中学物理教学科研研究内容现状的研究。
This study mainly carry on the pretreatment research of the data from airborne multi-sensor system. The content includes: time alignment, coordinate alignment and data association.
本文主要针对该系统的机载多传感器数据融合部分进行数据的预处理研究，内容包括：时间对准、坐标对准和数据关联。
The qualitative study mainly includes experimental researches on influencing factors of wear resistance, failure types and mechanisms of the wear of the material and contact analysis.
定性研究主要是对该材料耐磨损性能的影响因素、磨损失效形式、磨损机理进行试验研究和接触分析。
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