The labels of datasets have following meanings:
sid : Sensor Id of sensor which produced the event
ts : Timestamp value
x, y, z : Position of sensor
|v| : Velocity
vx, vy, vz : Metric used in velocity calculation. Read [1]
|a| : Acceleration
ax, ay, az : Absolute acceleration in respective direection
[1] Using vx, vy, vz velocity in directions x,y and z can be calculated as, v’x = |v| * vx * 1e-4 * 1e-6