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27. 矩陣相乘是一種非常耗時的運算,給定一個m✕n的矩陣 和一個n✕l的矩陣 ,兩個矩陣相乘總共需要m✕ n✕ l個乘法。現在給五個矩陣: ,請問下面哪個乘法的順序最有效率?專(A) (B)
問題詳情
27. 矩陣相乘是一種非常耗時的運算,給定一個m✕n的矩陣
和一個n✕l的矩陣
,兩個矩陣相乘總共需要m✕ n✕ l個乘法。現在給五個矩陣:
,請問下面哪個乘法的順序最有效率?專
(A)
(B)
(C)
(D)
參考答案
答案:B
難度:
適中
0.6
書單:
沒有書單,新增
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19. 甲測站位於高度 0 公尺的山腳下,一日測得地面溫度為 25°C,露點溫度為 15°C,地面至高空 10 公里平均溫度遞減率為 6.5°C/公里。若一未飽和的空氣塊自地面沿山坡抬升,上升過程中未
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【題組】37.What should an employee do if he/she cannot fix a problem with the copy machine?(A)Just leave
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