Supervised Expert System for Wearable MEMS Accelerometer-Based Fall Detector

Table 3

Types of tested kernels.

Kernel	Function
Linear	𝐾(𝑣𝑖,𝑣𝑗)=1+𝑣^𝑇𝑖𝑣𝑗
Polynomial	𝐾(𝑣𝑖,𝑣𝑗)=(1+𝑣^𝑇𝑖𝑣𝑗)^𝑝
Gaussian Radial Basis Function	𝐾(𝑣𝑖,𝑣𝑗)=exp−𝛾𝑣𝑖−𝑣𝑗^2
Sigmoid	𝐾(𝑣𝑖,𝑣𝑗)=tanh𝑘𝑣^𝑇𝑖𝑣𝑗−𝛿