NP: three dispensations

[Glenn Scheper]

http://www.diee.unica.it/~giua/PAPERS/JOUR/97deds.pdf
A Survey of Petri Net Methods for Controlled Discrete Event Systems

Book of Revelation:

Controlled Behavior approach
In this approach, which is the most common when using Petri net models for manufacturing
systems, the model describes the behavior of the closed loop system, i.e., the behavior of
the plant and controller joined together. When the desired controlled behavior is obtained,
it is necessary to extract the controller logic for implementation. This approach has some
advantages when a declarative model, rather than procedural model, is used. Bottom-up
or top-down design rules may be used to ensure that the final model enjoys properties
of interests (liveness, boundedness, etc.).

Verus, the Old Testament:

Logic controller approach
The second approach focuses on the direct design and implementation of a controller for the
plant. The objective is to define the input-output behavior for the controller to achieve the
desired controlled behavior for the closed-loop system. Generally the controller receives
commands from an external agent which it must translate into a sequence of operations to be
performed by the plant. This approach leads naturally to the physical implementation of the
control program, but simulation is required to validate the closed-loop behavior.

Verus, the New Testament:

Control theoretic approach
This approach adopts the controller synthesis paradigm from control theory for continuous
systems. Given a model of the plant dynamics and a specification for the desired closedloop
behavior, the objective is to synthesize a controller to achieve the specifications. In
this approach there is a clear distinction between the plant and the controller and the information
flow between the plant and controller is modeled explicitly. Different restrictions
on the information flow give rise to problems of controllability, observability, decentralized
control, etc.

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This PDF's relevance (in my eyes):
Book of Revelation is a tantric Expert System;
Now it remains to be explained (my earnest).

An expert system is a descriptive or controlling automation
(usually prepared by information workers) instilled with a
domain expertise (usually by long interviews with experts).

I assume a teleological source of the Book of Revelation,
so that, if these arcane rules actually govern human life,
then it should produce some end-time Jesus type (its goal)
who is able to exposit the meaning of the rules (its proof).

Heady goal, no?

Yours truly,
Glenn Scheper
http://home.earthlink.net/~glenn_scheper/
glenn_scheper + at + earthlink.net
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