optimization => Conjugate Gradient Method

Signed-off-by: CyberZHG <CyberZHG@gmail.com>
optimization => DFP (Davidon–Fletcher–Powell)

Signed-off-by: CyberZHG <CyberZHG@gmail.com>
optimization => BFGS (Broyden–Fletcher–Goldfarb–Shanno)

Signed-off-by: CyberZHG <CyberZHG@gmail.com>