合肥工业大学学报(自然科学版)
閤肥工業大學學報(自然科學版)
합비공업대학학보(자연과학판)
JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE)
2010年
3期
467-469
,共3页
复摆%抛物线法%黄金分割点%极小周期点
複襬%拋物線法%黃金分割點%極小週期點
복파%포물선법%황금분할점%겁소주기점
compound pendulum%parabola method%golden section point%extremum of period
钟摆式复摆的质心可以变化,因此具有极小周期点位置,在实验室条件下,这个极值点可以采用黄金分割法和Fibonacci法来搜索.但是采用抛物线法并适当结合黄金分割点确定搜索的初始值,然后逐步构造抛物线搜寻复摆的极值点,可以大大地提高搜寻速度和精度.文章通过实验采集数据并加以分析,证明了抛物线法搜寻复摆极值点比黄金分割法和Fibonacci法有更好的搜寻效果,并且该方法对于搜寻物理学中其它极值点问题具有参考价值.
鐘襬式複襬的質心可以變化,因此具有極小週期點位置,在實驗室條件下,這箇極值點可以採用黃金分割法和Fibonacci法來搜索.但是採用拋物線法併適噹結閤黃金分割點確定搜索的初始值,然後逐步構造拋物線搜尋複襬的極值點,可以大大地提高搜尋速度和精度.文章通過實驗採集數據併加以分析,證明瞭拋物線法搜尋複襬極值點比黃金分割法和Fibonacci法有更好的搜尋效果,併且該方法對于搜尋物理學中其它極值點問題具有參攷價值.
종파식복파적질심가이변화,인차구유겁소주기점위치,재실험실조건하,저개겁치점가이채용황금분할법화Fibonacci법래수색.단시채용포물선법병괄당결합황금분할점학정수색적초시치,연후축보구조포물선수심복파적겁치점,가이대대지제고수심속도화정도.문장통과실험채집수거병가이분석,증명료포물선법수심복파겁치점비황금분할법화Fibonacci법유경호적수심효과,병차해방법대우수심물이학중기타겁치점문제구유삼고개치.
The compound pendulum of alterable centroid has extremum of period which can be searched for by the golden section method and the Fibonacci method under laboratory condition. The parabola method with the golden cut points is used to confirm the initial place and search for the extremum place, which can enhance speed and precision. By experiments, it is proved that the parabola method is faster and more precise than the golden section method and the Fibonacci method in searching for extremum of compound pendulum. Furthermore, the method can offer some references for the study of other extremum in physics.