IMPROVED AERODYNAMIC APPROXIMATION MODEL WITH CASE-BASED REASONING TECHNIQUE FOR MDO OF AIRCRAFT

To increase the efficiency of the multidisciplinary optimization of aircraft, an aerodynamic approximation model is improved. Based on the study of aerodynamic approximation model constructed by the scaling correction model, case-based reasoning technique is introduced to improve the approximation model for optimization. The aircraft case model is constructed by utilizing the plane parameters related to aerodynamic characteristics as attributes of cases, and the formula of case retrieving is improved. Finally, the aerodynamic approximation model for optimization is improved by reusing the correction factors of the most similar aircraft to the current one. The multidisciplinary optimization of a civil aircraft concept is carried out with the improved aerodynamic approximation model. The results demonstrate that the precision and the efficiency of the optimization can be improved by utilizing the improved aerodynamic approximation model with ease-based reasoning technique.

浅析“孟德尔豌豆杂交实验(一)”中的科学思维实例及教学建议

在传统教学中,教师一般比较关注教材知识的挖掘和拓展,而对教材隐含的科学思维教学素材开发往往不够重视。列举“孟德尔豌豆杂交实验(一)”一节中的科学思维实例,并提出相应的教学建议,以引发教师对挖掘教材中科学思维实例的关注,从而多途径逐步提高学生的科学思维能力。

开展生命价值观教育的基本线索

系统地阐述了生命价值观的含义,并提出了中小学开展生命价值观教育的3条基本线索,同时围绕以科学事实增加生命教育吸引力,以进化规律引导学生提升自身素质,以稳态规律促进学生和谐生存的3条基本线索进行了丰富的实例举证。这对于指导一线教师组织生命教育素材有一定的实践指导意义。