By analyzing frequency model and corresponding quality index evaluation model, the paper reveals the causes of accidents, and suggests some approaches to reduce and control transport accident.
通过事故次数模型和质量指标评价模型的相应分析，揭示了发生事故的主要因素，提出了减少和控制事故发生的一些手段。
The established arc model and its solving method can be applied to directional well trajectory control and target hitting quality evaluation, etc.
所建立的圆弧模型及求解方法可应用于定向井井眼轨迹控制和中靶质量评价等。
Simulation result indicates that the equivalent moment derivatives model can be used in the evaluation of aircraft conceptual design and flight control system design.
验证表明，等效力矩导数模型可用于评估设计方案或指导飞行控制系统设计。
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