Some questions of achieving curriculum sampling

[swg209]

@xinggangw @speedinghzl @ppengtang @JaminFong @ChaoLi977 Hi, I got fused of what values should Nn, t0, t1 set when I get (P *K ) (8 * 4) in a batch. How to decide Nn =80, t0=30, t1 =60? Thx.