Crude Oil Price Prediction Based on a Dynamic Correcting Support Vector Regression Machine

Table 1

Benchmark functions.

Function	Formula	Global minimum
Sphere	𝑓1(𝑥)=∑^𝑛𝑖=1𝑥^2𝑖, 𝑥𝑖∈[−100,100].	𝑓^∗1(𝑥)=0, 𝑥^∗=(0,0,…,0)
Rosenbrock	𝑓2=∑^𝑛=1𝑖=1100×𝑥𝑖+1−𝑥^2𝑖^2+𝑥𝑖−1^2, 𝑥𝑖∈[−30,30].	𝑓^∗2(𝑥)=0, 𝑥^∗=(1,1,…,1)
Griewank	𝑓3=14000^𝑛𝑖∑=1𝑥𝑖^2−∏^𝑛𝑖=1𝑥cos^𝑖√𝑖+1, 𝑥𝑖∈[−600,600].	𝑓^∗3(𝑥)=0, 𝑥^∗=(0,0,…,0)