III
VI.3.5. Gradient Boosting ..................................................................................................... 73
VI.3.6. Extreme Gradient Boosting (XGBoost) .................................................................... 74
VI.3.7. Artificial Neural Networks ........................................................................................ 74
VI.4. Description of the database .............................................................................................. 76
VI.5. Data preprocessing ........................................................................................................... 78
VI.5.1. Database cleaning ..................................................................................................... 79
VI.5.2. Application of Froude Similarity .............................................................................. 79
VI.6. Analysis and Validation of the ANN Algorithm ............................................................. 81
VI.7. Analysis and Validation of the XGBoost Algorithm ....................................................... 82
VI.8. Model developed for rubble mound breakwater .............................................................. 84
VI.9. Conclusion ....................................................................................................................... 85
Chapter VII. Wave flume .......................................................................................................... 86
VII.1. Introduction ..................................................................................................................... 86
VII.2. 2D Waves generator ....................................................................................................... 86
VII.2.1. Description of the Flap-Type Wavemaker .............................................................. 86
VII.2.2. Mathematical model ................................................................................................ 87
VII.3. Wave flume synthesis ..................................................................................................... 90
VII.3.1. Wave Break Limit .................................................................................................... 91
VII.3.2. Maximum wave height in the flume ........................................................................ 91
VII.3.3. Ballscrew maximum acceleration ............................................................................ 91
VII.3.4. Maximum actuator stroke ........................................................................................ 91
VII.3.5. Wave number determination .................................................................................... 91
VII.4. Conclusion ...................................................................................................................... 94
Conclusions ................................................................................................................................... 95
References ..................................................................................................................................... 97
Annex A Business model canvas .................................................................................................. i
A.1 Value proposition .............................................................................................................. i
A.2 Key activities .................................................................................................................... ii
A.3 Key partners ..................................................................................................................... iii
A.4 Customer segments .......................................................................................................... iii
A.5 Customer relations ........................................................................................................... iv
A.6 Distribution channels ........................................................................................................ v