The sigmoid function frequently appears in machine learning contexts. It has a simple form: $$\sigma(x)=\frac{1}{1+e^{-x}}$$. A naive implementation in C would be: It looks.

Explain The Idea Word vector is widely used in text-related AI processes. Its center idea is to maximize the following likelihood function. $$\begin{equation} \label{eq:originalL}L(\theta).