Engineering & Materials Science
Drill strings
100%
Stick-slip
46%
Pendulums
37%
Drilling
35%
Rocks
22%
Feedback control
20%
Controllers
19%
Drilling rigs
17%
Buckling
16%
Sliding mode control
13%
Mathematical models
13%
Rotors
11%
Orbits
11%
Drill pipe
11%
Experiments
10%
String theory
10%
Switches
9%
Chaos theory
9%
Actuators
9%
Stators
9%
Finite element method
9%
Feedback
8%
Reefs
7%
Friction
7%
Bifurcation (mathematics)
6%
Elastic deformation
6%
Horizontal wells
6%
Fatigue crack propagation
5%
Dynamic loads
5%
Energy conservation
5%
Voltage control
5%
Mathematics
Strings
22%
Vibration
17%
Drilling
16%
Stick-slip
16%
Numerical Study
15%
Experimental Study
11%
Experimental Results
10%
Horizontal Well
10%
Energy Saving
9%
Dynamic Load
8%
Controller
8%
Excitation
8%
Sliding Mode Control
8%
Nonlinear Dynamics
7%
Delayed Feedback
7%
Elastic Deformation
7%
Friction
7%
Oscillation
7%
Nonlinear Control
7%
Pump
6%
Stress Field
6%
Substrate
6%
Chaos
6%
Control Strategy
6%
Lateral
6%
Optimization Algorithm
5%
Dynamic Model
5%
Systems Engineering
5%
Motion
5%
Orbit
5%
Model
5%
Periodic Orbits
5%
Physics & Astronomy
strings
28%
drilling
16%
slip
16%
pendulums
15%
controllers
14%
drill bits
14%
vibration
13%
clearances
13%
feedback control
12%
sliding
12%
rotors
10%
actuators
9%
torsional vibration
8%
oscillators
8%
rocks
8%
oscillations
7%
blades
7%
actuation
6%
crack propagation
5%
irregularities
5%
elastomers
5%