Mathematics
Stick-slip
100%
Strings
55%
Oscillation
52%
Drilling
24%
Efficacy
17%
Damping
15%
Controller
15%
Tracking Control
12%
Open-loop Control
11%
Sliding Mode
11%
Parameter Uncertainty
11%
Angular velocity
10%
Performance
9%
Closed-loop
9%
Trends
8%
Simplicity
7%
Degree of freedom
7%
Robustness
6%
Model
5%
Design
5%
Demonstrate
4%
Physics & Astronomy
strings
57%
slip
56%
oscillations
41%
drilling
19%
controllers
16%
drill bits
13%
damping
13%
angular velocity
8%
rocks
7%
sliding
7%
performance
7%
degrees of freedom
6%
trends
6%
Engineering & Materials Science
Drill strings
91%
Stick-slip
85%
Drilling
14%
Damping
12%
Degrees of freedom (mechanics)
9%
Controllers
8%
Angular velocity
8%
Rocks
7%
Uncertainty
5%
Chemical Compounds
Drill Bit
61%
Velocity
55%