By Albert Fetzer, Heiner Fränkel, Albert Fetzer, Heiner Fränkel, Dietrich Feldmann, Horst Schwarz, Werner Spatzek, Siegfried Stief
Dieses erfolgreiche einf?hrende Lehrbuch liegt nun in der 10. Auflage vor. Es zeichnet sich durch eine exakte und anschauliche Darstellung aus. Der Lehrstoff ist klar gegliedert und intestine strukturiert. Er wird durch eine F?lle von Beispielen und Abbildungen veranschaulicht und vertieft.
Zahlreiche Aufgaben mit L?sungen zu jedem Abschnitt erleichtern das Selbststudium.
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Additional resources for Mathematik / Albert Fetzer. 1
A positive signal -\-dx causes y to be added to r, and a negative signal subtracts y from r. 58 DIGITAL DIFFERENTIAL ANALYSERS The contents of the address tracks are not changed throughout the entire computation and are rewritten as shown in the diagram These tracks are used only to explore the contents of the Z track at the correct time and to provide the connexions between integrators. Unity in the first cell in time order in the Y register is called the start pulse and constitutes a marker to determine the number of places in the number Y contained in the next part of the Y register after this cell.
This causes signals having the same shape and amplitude to be fed to the grids of the valves supplying the write-on heads. The recording method used in the storage unit is the "non return to zero" technique, in which the surface of the drum is magnetized to saturation by the "erase" head and the recording head remagnetizes certain sections of the track. THE DESIGN OF MODERN DIGITAL DIFFERENTIAL ANALYSERS 55 The registers for the integrators of a differential analyser are formed by sectors of the tracks on the magnetic drum.
By interpolation, the values of the effective initial conditions can be calculated to a higher precision than that which is afforded by the number of places occupied in each register. If need be, new starting data can be fed-in, corrected so as to obtain the requisite values of the effective initial conditions and constants, and equations may also be used which roughly approximate to the actual physical processes. We shall here introduce the notion of systems which are unstable at the start of a solution and those which are unstable at the conclusion.