I don ' t really have a choice , summ 我可沒有其他選擇了, summ
One swallow does not make a summ 一燕不成夏
This essay mainly deals with how to help junior and senior school students overcome their difficulties in their mechanic learning , as they have many pre - science conceptions and mistaken cognitions . guided by the educational psychology , we may try testing the students such ideas by diagnosis . so we can know the basical contents of the students pre - science conceptions and mistaken cognitions by comparing and analysing the testing results of junior grade two and three , senior grade one and two . the sources and characteristics of such ideas are summ arized . some ways of how to correct the mistaken cognitions are also presented . at the same time , it points out that pre - science conceptions are the students " spiritual wealth , teachers must change senses about this , value the students " ideas and be instructions , helpers and promoters in correcting the students " such mistaken conceptions 本文主要是針對初、高中學生學習力學的過程中,存在許多的與科學概念相異的前科學概念和錯誤認識,給物理教學帶來了極大的困難。因此,試圖在教育心理學理論的指導下,對學生產(chǎn)生這些想法采用診斷法進行測試,并通過對初二、初三、高一、高二測試結(jié)果進行對比分析得出了初中生、高中生中所存在的前科學概念和錯誤的基本內(nèi)容,總結(jié)了它們的來源和基本特征,提出了糾正此類錯誤認識的措施和具體方法,同時指出前科學概念也是學生的精神財富,教師要改變觀念,尊重學生,做糾正學生前科學錯誤概念的指導者、幫助者、促進者。
The work of this thesis lays a solid foundation for the integration of cad , capp and rp . the main work may be summ arized as follows : ( 1 ) after discussing all kinds of existing algorithms , this thesis presents a new kind of adaptive slicing algorithm that determines the slicing thickness by comprehensively considering the surface normal and the cross - sectional area . and for the same part , a comparison between the adaptive slicing and the equal - thickness slicing methods is performed 論文所做的主要工作如下: ( 1 )在綜合考慮各種分層算法的基礎(chǔ)上,提出了法線與面積綜合判定法來確定分層厚度的cad模型直接自適應分層算法:并針對同一模型對自適應分層和等厚分層進行了比較,結(jié)果發(fā)現(xiàn):自適應分層在精度方面雖然與等厚分層基本相當,但是其層數(shù)可以顯著減少,所以采用自適應分層可使成形效率顯著提高。