CAJ | 학술논문

提出在Dr．Bridge建模中利用直线快速编辑器准确辨识抛物线拟合方向的新方法．通过考查二次抛物线在单调区间内的凸凹性，确定基于两控制点抛物线可能出现的4种性态．在此基础上，引入表征抛物线单调性及凸凹性的两套符号，给出了基于两控制点抛物线拟合方向的判定方法，拓展了Dr．Bridge直线快速编辑器由两控制点准确拟合抛物线的新途径．无论由两控制点还是由三控制点进行抛物线拟合，该判定方法均能适用．本文方法操作简捷，易于程序实现．
제출재Dr．Bridge건모중이용직선쾌속편집기준학변식포물선의합방향적신방법．통과고사이차포물선재단조구간내적철요성，학정기우량공제점포물선가능출현적4충성태．재차기출상，인입표정포물선단조성급철요성적량투부호，급출료기우량공제점포물선의합방향적판정방법，탁전료Dr．Bridge직선쾌속편집기유량공제점준학의합포물선적신도경．무론유량공제점환시유삼공제점진행포물선의합，해판정방법균능괄용．본문방법조작간첩，역우정서실현．
A new method is presented to determine the fitting direction while using Dr.Bridge′s linear ed-itor to model various parabolas in this paper.By considering convex-concave property at monotone inter-val of a quadratic curve, four different parabola shapes with two controlling points fitted, are provided. Based on the method, two sets of symbols are introduced to describe the monotonicity and convex-concave property of parabola.And the identification of parabola fitting direction is presented, which explores a new way to fit a parabola by two controlling points when linear editor of Dr.Bridge is used.The presented method is suitable for determining the parabola fitting direction whether parabola is fitted by two or by three controlling points.The method is illustrated by its simplicity and convenience, and efficient for pro-gram realization, which greatly promotes the modeling efficiency.