oracl 和db2 常用语法比较： 1、取前N条记录 Oracle：Select * from TableName where rownum <= N; DB2：Select * from TableName fetch first N rows only; 2、取得系统日期 Oracle：Select sysdate from dual; DB2：Select current timestamp from sysibm.sysdummy1; 3、空值转换 Oracle：Select
大数据下的机器学习算法综述，介绍利用大数据做机器学习的常用算法ordan
Little bootstraps
Boot
frap
ordan
4
4.1
4.2
Kol-
Tucker
Memory -Efficient Tucker Decomposition MET
MET
densed Nearest Neighbor CNN
R
duced nearest neighbor RnN
Ed
MET
ted Nearest Neighbor ENN
Wahba
h
10
Regularize
矩阵微积分 Matrix calculus，附录，对矩阵和向量求导D 1. GRADIENT, DIRECTIONAL DERIVATIVE, TAYLOR SERIES
551
VxI
2(X)△|vax
(X)Vbx2|∈K×L×KxL
dg(x
V
6g(X)
aa(X)
OKI
aXK2
OXKL
(1962
VV
X
五×1×L×H×L
R
9(X)
where the gradient V is with respect to matrix X
Gradient of vector-
