Edison , because he was the first to make these experiments , had to learn many times by the trial - and - error method 因為愛迪生是第一個進行這種實驗的人,他不得不通過實驗-失敗的辦法學習很多次。
Some preceding rain factors were list , then stepwise regression algorithm was employed to select the obvious factors from the list as the input of the bp networks . and the trial - and - error method is employed to define the number of the hidden layer nodes 論文列出若干個前期降雨量因子,利用逐步回歸算法從中挑選出影響因素大的作為網絡的輸入,通過“試錯法”確定隱節(jié)點數(shù)。
For example , since different operating points of power system have different stability characteristics , utility engineers often perform a large number of stability studies to search for a stable one by trial - and - error methods incorporating engineering experience 目前各電網調度中心主要采用的試錯搜索法結合穩(wěn)定計算經驗來尋找保持暫態(tài)穩(wěn)定的運行方式的方法,現(xiàn)在看來無疑是耗時的和不完善的。
Trajectory designing has been a hot topic for the researchers and many methods have been presented . but most of methods nowadays for designing 3d horizontal wells are based on trial - and - error method . so well trajectory designing depend greatly on the experience of the designer , which lead to the time - consuming trial - and - error procedure while using those kinds of methods 近年來,水平井軌跡設計技術的研究一直較為活躍,相繼提出了不少的方法及針對具體問題的具體做法,但這些方法從本質上講,都未脫離試錯法的范疇,井眼軌跡部分參數(shù)的確定取決于設計者的經驗與直覺。