Boots – shoes – and leggings
Patent
1992-05-28
1996-01-16
Harrell, Robert B.
Boots, shoes, and leggings
364DIG1, 364DIG2, 364221, 3642212, 364916, 3649163, G06F 1560, G06F 1700
Patent
active
054855993
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a method and apparatus for simulation of a spatially-extended physical process.
BACKGROUND OF THE INVENTION
Simulation of spatially-extended physical processes is already well known and conventionally is implemented on a digital computer which has the ability of modelling the physical process, the complete spatial extent of which is defined by a multiplicity of parameters, utilising signal input/output devices, a logic unit and a memory unit. The memory unit has a first set of memory cells which contain values for the multiplicity of parameters and a second set of memory cells which store a logic unit instruction program. The logic unit is arranged to fetch first instructions from the second set of memory cells and to implement these first instructions on first selected parameter values retrieved from the first set of memory cells in order to compute new values for these parameters which are then returned to the first selected cells of the first set. This procedure is then repeated through second and subsequent instructions implemented on second and subsequent selected parameter values. Intermittently the logic unit recycles through the first, second and subsequent instructions to update the first, second and subsequent parameter values. The development of the physical process is thus simulated on a cyclic basis with each cycle containing a plurality of sequential steps each operating on a selection of parameter values. Each selection is limited by the number of binary bits of information that can be transmitted simultaneously between the logic unit and the memory unit on the conductors interconnecting these units and as a practical matter these conductors are limited in number being substantially fewer than the number of parameters in the multiplicity defining the physical process. Accordingly, the speed of operation of the known simulation method and apparatus is limited and the multiplicity of parameter values cannot be updated simultaneously.
OBJECT AND SUMMARY OF THE INVENTION
It is an object of the present invention to provide a new and improved method and apparatus for simulating a physical process.
According to the present invention there is provided a method of simulating a spatially-extended physical process the complete spatial extent of which is defined by a multiplicity of parameters, the method comprising representing each parameter with a multi-state distinguished sequential digital logic circuit the possible states of which represent the possible states of the pertaining parameter, representing the interaction of each pair of parameters with an interconnection between the pertaining multi-state distinguished sequential digital logic circuits, initially establishing each logic circuit in a known state, pulsing at least one of the multi-state distinguished sequential digital logic circuits in the array to cause circuits of the array to evolve through at least some of their possible states, and intermittently determining the states of at least some of the circuits of the array as a measure of the corresponding states of the parameters of the physical process.
The pulsing step may be implemented by an external pulse signal applied to all of the circuits of the array or by an internal pulse signal generated by one or more of the circuits of the array and applied to less than all of the circuits of the array.
In another aspect the present invention provides apparatus for simulating a spatially-extended physical process the complete spatial extent of which is defined by a multiplicity of parameters, the apparatus comprising a multiplicity of multi-state sequential digital logic circuits each distinguished to represent a respective one of the multiplicity of parameters of the process so that the possible states of each said circuit represent the possible states of the pertaining parameter, means interconnecting at least those said circuits representing parameters having mutual interaction, means for initially establishing each logic circuit in
REFERENCES:
patent: 3728534 (1973-04-01), Bertram et al.
patent: 4376538 (1983-03-01), Kennan
"A Functional Modeling Strategy for Silicon Compilation", by Ken McElvain, pp. 1-6.
Cockshott William P.
Milne George J.
Harrell Robert B.
The University of Strathclyde
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