def METHOD_NAME(fv, normalization= None):
    if normalization is None:
        fvm = fv.mean(1)
        fvs = fv.std(1)
    else:
        fvm, fvs = normalization
    #fv = (fv-fv.mean(1)[:, None])/fv.std(1)[:,None]
    #fv = fv/fv.std(1)[:,None]
    return (fv-fvm[:, None])/fvs[:,None], (fvm, fvs)