knowledge contribution

AIDS prevention and control knowledge

knowledge application context

Knowledge of prevention and control

Prevention and control knowledge

local knowledge and whole knowledge

Contraction Shift Strategy

∑-generalized contradiction

△-analytic continuation

△-contraction

△-contraction graph

1 planar contraction flow

1-set contraction

1-set contraction mapping

4 planar contraction flow

4∶1 planar contraction

a bone of contention

A group contribution model

abnormal uterine contraction