FITC_layer.py 文件源码

def compute_phi_cavity(self):
        phi = 0
        for d in range(self.Dout):
            muhatd_val = self.muhat[d].get_value()
            Suhatd_val = self.Suhat[d].get_value()
            # s, a = npalg.slogdet(Sud_val)
            a = np.log(npalg.det(Suhatd_val))
            phi += 0.5 * np.dot(muhatd_val.T, np.dot(npalg.inv(Suhatd_val), muhatd_val))[0, 0]
            phi += 0.5 * a
        return phi