| DEEM | Doubly-enhanced EM algorithm | 
| TEMM | Fit the Tensor Envelope Mixture Model (TEMM) | 
| TGMM | Fit the Tensor Gaussian Mixture Model (TGMM) | 
| tune_K | Select the number of clusters 'K' in DEEM | 
| tune_lamb | Parameter tuning in enhanced E-step in DEEM | 
| tune_u_joint | Tuning envelope dimension jointly by BIC in TEMM. | 
| tune_u_sep | Tuning envelope dimension separately by BIC in TEMM. |