The 40-mm-diameter A-36 steel shaft is subjected to the torques shown. The angle of twist of end A with respect to C is ( ). The shear modulus ofA-36 steel is 75 GPa.【图片】
【简答题】Read the following text and answer the questions below. No wrong numbers Mr. James Scott has a garage in Silbury and now he has just bought another garage in Pinhurst. Pinhurst is only five miles from...
【简答题】5 假设模型为Y t =α+βX t +μ t 。给定n个观察值(X 1 ,Y 1 ),(X 2 ,Y 2 ),…,(X n ,Y n ),按如下步骤建立β的一个估计量:在散点图上把第1个点和第2个点连接起来并计算该直线的斜率;同理继续,最终将第1个点和最后一个点连接起来并计算该直线的斜率。最后对这些斜率取平均值,称之为 ,即β的估计值。
【简答题】Read the following text and answer the questions below. No wrong numbers Mr. James Scott has a garage in Silbury and now he has just bought another garage in Pinhurst. Pinhurst is only five miles from...