For solving the difficulty in the control of molecular weight distribution (MWD) of polymer product, MWD via neural network without any transcendental information is modelled.

为了解决聚合产品分子量分布控制的难题，将神经网络引入对其进行了无需任何系统内部先验知识的黑箱建模。

youdao

It is difficult to "troubleshoot" your weight loss efforts without more information, but your struggle brings up a couple of important points.

CNN: I'm exercising; why can't I lose weight?