. Design for a brain. Brain -- Physiology; Central nervous system -- Mathematical models; Neurophysiology. 22/2 DESIGN FOR A BRAIN Then if du/dt = <5{(w, v, . .)}, du/dt will be usually zero ; but if the changes of w, v, . . take through zero, then d(u) becomes momentarily infinite and n will change by a finite jump. These. Figure 22/2/2 : Field of the 3-variable system. representations are of little practical use, but they are important theoretically in showing that a step-function can be represented in the canonical equations. 22/3. In an absolute system, a step-function will change value
. Design for a brain. Brain -- Physiology; Central nervous system -- Mathematical models; Neurophysiology. 22/2 DESIGN FOR A BRAIN Then if du/dt = <5{(w, v, . .)}, du/dt will be usually zero ; but if the changes of w, v, . . take through zero, then d(u) becomes momentarily infinite and n will change by a finite jump. These. Figure 22/2/2 : Field of the 3-variable system. representations are of little practical use, but they are important theoretically in showing that a step-function can be represented in the canonical equations. 22/3. In an absolute system, a step-function will change value if, and only if, the system arrives at certain states : the critical. In Figure 22/2/2, for instance, all the points in the plane k = K and to the right of the line xx = X are critical states for the step- function k when it has the initial value K. The critical states may, of course, be distributed arbitrarily. More commonly, however, the distribution is continuous. In this case there will be a critical surface (kt X{, . . , Xn) = 0 which, given k, divides the critical from the non-critical states. In Figure 22/2/2, for instance, the surface intersects the plane k = K at the line x1 = X. (The plane k = 0 is not intersected by it, for there are no states in this system whose occurrence will result in k changing from 0.) Commonly <£ is a function of only a few of the variables of the 231. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ashby, William Ross. New York : Wiley
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Keywords: ., bookcentury1900, bookpublishernewyorkwiley, booksubjectneurophys
