Engineering & Materials Science
Drill strings
100%
Stick-slip
45%
Pendulums
37%
Drilling
26%
Rocks
22%
Feedback control
19%
Drilling rigs
17%
Buckling
16%
Controllers
16%
Sliding mode control
13%
Mathematical models
13%
Rotors
12%
Experiments
10%
String theory
10%
Orbits
10%
Drill pipe
10%
Switches
9%
Chaos theory
9%
Stators
9%
Finite element method
9%
Feedback
8%
Reefs
8%
Friction
7%
Actuators
6%
Bifurcation (mathematics)
6%
Elastic deformation
6%
Horizontal wells
6%
Fatigue crack propagation
5%
Dynamic loads
5%
Energy conservation
5%
Voltage control
5%
Physics & Astronomy
strings
28%
slip
16%
pendulums
15%
drill bits
14%
clearances
13%
sliding
12%
vibration
12%
controllers
11%
rotors
10%
feedback control
10%
drilling
10%
torsional vibration
8%
rocks
8%
actuators
7%
oscillations
6%
crack propagation
5%
irregularities
5%
elastomers
5%
actuation
5%
Mathematics
Numerical Study
15%
Strings
13%
Vibration
12%
Energy Saving
9%
Experimental Study
9%
Experimental Results
9%
Dynamic Load
9%
Excitation
8%
Stick-slip
8%
Sliding Mode Control
8%
Delayed Feedback
7%
Elastic Deformation
7%
Controller
7%
Nonlinear Control
7%
Pump
7%
Drilling
7%
Stress Field
6%
Substrate
6%
Chaos
6%
Control Strategy
6%
Optimization Algorithm
5%
Systems Engineering
5%
Orbit
5%
Periodic Orbits
5%