                    ⁢                                          ⁢                                                    (                                  0                                      0                    ⁢                                                                  πσ                        0                                            ⁡                                              (                                                  m                          ,                          k                                                )                                                                                            )                                            0                0                                      ⁢                          exp              ⁡                              (                                                      -                                          0                      0                                                        ⁢                                                            ∑                                              k                        =                        0                                            K                                        ⁢                                                                                            (                                                                                    o                              ⁡                                                              (                                k                                )                                                                                      -                                                          μ                              ⁡                                                              (                                                                  m                                  ,                                  k                                                                )                                                                                                              )                                                0                                                                    0                        ⁢                                                                              σ                            0                                                    ⁡                                                      (                                                          m                              ,                              k                                                        )                                                                                                                                              )                                                                        (        0        )                                          b          ⁡                      (            𝕆            )                          =                              ∑                          m              =              0                        M                    ⁢                                    w              ⁡                              (                m                )                                      ·                                          b                ′                            ⁡                              (                                  m                  ,                  𝕆                                )                                                                        (        0        )            where 