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Consider a system recieving signals from a signal-source. The signals describe different input situations. The purpose of the system is to classify the current situation. This can be obtained by means of recursive algorithms. The problem of finding such algorithms can be approached in many different ways. In this report we will assume a minimum of apriori information about the signals and the clas

The task was to write a program for plotter output on a ink jet plotter built at Inst. för Elmät, LTH. This plotter puts dots of ink on a paper fastened to a rotating drum and it must have, for every x-coordinate in its turn, the y-coordinates in rising order where it shall put a dot. 0In data exists in dump mode on DEC-tape, and consists of files of starting points followed by step

In this report are discussed different algorithms for the state estimation problem according to the Kalman theory. It is shown that the highest accuracy is obtained with av algorithm consisting of three non-negative definite parts, but that shorter algorithms may be sufficient for certain systems. The necessity of enforcing symmetry on the algorithms is discussed together with different methods fo

The purpose with mathematical models in ecology is 1) to help to create better understanding of ecological systems behaviour and 2) to make it possible to estimate more accurately the effects of human interference in nature.

This paper deals with optimal long-distance steering of large vessels. The purpose of the paper is to design a regulator, that keeps a vessel, when affected by different disturbances, on an economical course. The vessel is supposed to have constant speed forward and therefore the only steering variable is the rudder angle. From a mathematical model of the vessel, the equations of motion are calcul

Measurements of a room have been done at the institution Byggnadskonstruktionslära, and I would like to thank the institution and especially Kurt Källblad for the help.
Measurements have been done at three different warming types, radiant-, convective- and radiator warming.
I have two inputs. One is the temperature of the heating apparatus, and the other one the outdoor temperature. The

This paper deals with the construction of an interface which is to be placed between a process and a Process Computer.

The interface shall integrate the process signal during a period which is a multiple of the period of the line-frequency. This means that the disturbance from line-frequency will be completely eliminated.

The process signal is also to be transformed to the 0-+-10