Fig. 1 Preparation of lubricating grease and the tribological test process More about this image found in Preparation of lubricating grease and the tribological test process

Fig. 2 The tribological test results of lubricating grease under variable content conditions: ( a ) COF of ILs-WS 2 , ( b ) wear width of ILs-WS 2 , ( c ) COF of ILs-MoS 2 , and ( d ) wear width of ILs-MoS 2 More about this image found in The tribological test results of lubricating grease under variable content ...

Fig. 3 The tribological test results of lubricating grease under variable load conditions: ( a ) COF and ( b ) wear width More about this image found in The tribological test results of lubricating grease under variable load con...

Fig. 4 Implementation process of stacking ensemble learning algorithm based on five-fold cross-validation More about this image found in Implementation process of stacking ensemble learning algorithm based on fiv...

Fig. 5 The implementation process of constructing lubricating grease tribological performance prediction model More about this image found in The implementation process of constructing lubricating grease tribological ...

Fig. 6 Evaluation results for base learners: ( a ) R 2 for COF, ( b ) RMSE for COF, ( c ) MAE for COF, ( d ) R 2 for wear width, ( e ) RMSE for wear width, and ( f ) MAE for wear width More about this image found in Evaluation results for base learners: ( a ) R 2 for COF, ( b ) RMS...

Fig. 7 Iterative curve of the fitness values for the four models: ( a ) COF and ( b ) wear width More about this image found in Iterative curve of the fitness values for the four models: ( a ) COF and ( ...

Fig. 8 Comparison of the predicted and true values for each model: ( a ) COF and ( b ) wear width More about this image found in Comparison of the predicted and true values for each model: ( a ) COF and (...

Fig. 9 Evaluation results for each model: ( a ) R 2 for COF, ( b ) RMSE for COF, ( c ) MAE for COF, ( d ) R 2 for wear width, ( e ) RMSE for wear width, and ( f ) MAE for wear width More about this image found in Evaluation results for each model: ( a ) R 2 for COF, ( b ) RMSE f...

Fig. 1 The structure of the porous gas journal-bearing structure More about this image found in The structure of the porous gas journal-bearing structure

Fig. 2 Illustration of the journal bearing with circumferential rotor waviness More about this image found in Illustration of the journal bearing with circumferential rotor waviness

Fig. 3 Schematic diagram of the journal bearing in local coordinate More about this image found in Schematic diagram of the journal bearing in local coordinate

Fig. 4 The mixed boundary condition on the waviness rotor surface More about this image found in The mixed boundary condition on the waviness rotor surface