【单选题】两个轴心受拉构件,一个为预应力混凝土的、另一个为普通混凝土的,其截面、材料、配筋等完全相同,施加预应力的极限承载力为 ,不施加预应力的极限承载力为 ,那么有( )。
【简答题】How can a small stamp be worth $16,800? Any mistake made in the printing of a stamp raises its value to stamp collectors. A mistake on a two-penny stamp has made it worth a million and a half times it...
【简答题】系统的详细设计包括:信息代码设计、()、数据库设计、编制模块说明书。
【多选题】How to choose the optimal value for K?
A.
Cross-validation can be used to determine a good value by using an independent dataset to validate the K values.
B.
Low values for K (like k=1 or k=2) can be noisy and subject to the effect of outliers.
C.
A large k value can reduce the overall noise so the value for 'k' can be as big as possible.
D.
Historically, the optimal K for most datasets has been between 3-10.
【判断题】俄国民众对的信仰是吉霍米洛夫君主进化论的根基。