Figures & data
Table 1. Terms and interpretations.
Figure 1. Different kernel estimation results: (a) rule-of-thumb method, (b) Sheather-Jones’ plug-in method, (c) maximal smoothing principle, (d) likelihood cross validation method.
![Figure 1. Different kernel estimation results: (a) rule-of-thumb method, (b) Sheather-Jones’ plug-in method, (c) maximal smoothing principle, (d) likelihood cross validation method.](/cms/asset/c0e4d159-4363-420e-8110-7a6f3a996d1f/tgsi_a_1179896_f0001_oc.gif)
Figure 2. Underlying function and its kernel estimation: (a) underlying function, (b) rule-of-thumb method, (c) Sheather-Jones’ plug-in method, (d) maximal smoothing principle, (e) likelihood cross validation method.
![Figure 2. Underlying function and its kernel estimation: (a) underlying function, (b) rule-of-thumb method, (c) Sheather-Jones’ plug-in method, (d) maximal smoothing principle, (e) likelihood cross validation method.](/cms/asset/5101957d-b2ab-4a38-92cb-99550f92c2bc/tgsi_a_1179896_f0002_oc.gif)
Figure 3. Estimation results of different potential function with rule-of-thumb method: (a) potential function 1, (b) potential function 2.
![Figure 3. Estimation results of different potential function with rule-of-thumb method: (a) potential function 1, (b) potential function 2.](/cms/asset/58d93003-0b72-4b0b-9a3e-4bf6a9b681ea/tgsi_a_1179896_f0003_oc.gif)