摘要
为了给出两个向量的“数量积”的几何意义,现行人教版教材引入了向量的投影和射影的概念.二者字面意思基本一样,但“投影”是一个实数,“射影”是一个向量,二者不是同一类事物,而且对向量的射影的表述有不当之处.为此,本文给出了“一个向量在另一个向量方向上的射影向量和射影向量系数”的概念,“射影向量系数(射影系数)”这一概念,为作者本人首次提出,具有重要的教学价值和理论价值.
In order to give the geometric meaning of Inner product of two vector,the textbook printed by People s Education Press use the concepts of "projection" and "image" of vector."Projection"is a real number,while "image" is a vector.They once far from being the same.And the description of "image" vector in the book is something which desers "image" more consideration.For this reason,the author of the article puts forword a new concept projective vector...
出处
《甘肃联合大学学报（自然科学版）》
2007年第3期113-114,126,共3页
Journal of Gansu Lianhe University :Natural Sciences
