Written sections regarding stability, controllability and observability, transfer function and canonical realizations in state space (controls).
Written sections regarding system description, error metric, Kalman filter equations for both the regular and extended Kalman filter, as well as derivation in Kalman filter.
Total rewrite of Pulse-doppler radar to present the underlying principles, formulas, as well as clearifying that it is NOT based on the doppler effect.
Wrote autocorrelation technique article, which is used to estimate the dominating frequency in a signal.
Numerical computing
Matrix inversion, analytic formulas for 2x2, 3x3 and blockwise inversion