act drop
2.As for clustering problem aspect, we analyze the current classical clustering algorithms and several ant clustering models based on the behavior of piling ants’corpses. In the models of BM and LF, ants act as porters to transit the data to the proper places to form clusters through the behaviors of“pick up”and“drop down”.
3.The hydrodynamic propulsor takes drill fluid as power source, with the aid of the axial load produced by the pressure drop of the bit nozzle, makes the axial force act on the bit to produce WOB, making up for the insufficient WOB, ensuring the bit feeding smoothly and improving the penetration rate.
