generate_elliptical     Generate Elliptical Streaming Data Generate
                        elliptical normal / student-t heavy-tailed
                        covariate stream
offline_sir             Offline Batch SIR (Baseline Comparison
                        Algorithm) Classical full-data sliced inverse
                        regression
osir                    Online SIR (Two Online Solvers) Streaming
                        recursive OSIR, gradient / perturbation two
                        update methods
sim_ablation            Batch Ablation Simulation Tool Generate
                        experiment table for paper drawing
subspace_mse            Subspace Projection MSE Loss Function
