The Kalman filter (named after its inventor, Rudolf E Kalman[?]) is an efficient recursive computational solution of the least-squares method[?], which is applicable to distinguishing signals from noise so as to predict changes in a modeled system with time.
... 753 families residing in the village. The population density is 529.3/km² (1,369.6/mi²). There are 1,031 housing units at an average density of 178.5/km² ...