| 摘要 |
<p>An expert system wherein the rules are of three classes: 1) retrieval rules (210), which each associate one of several attributes to an object in accordance with the values of inputs; 2) analysis rules (220), which selectively associate an attribute with an object, and which are somewhat analogous to the natural-language inference rules which would be used in communications between domain experts; and 3) action rules (230), which selectively carry out the output and control actuation options, based on the attributes associated with objects by the other rules. This system permits certain rules to be revised at any time without requiring the specialized skills of a "knowledge engineer". The expert system can be used in conjunction with an integrated system for process control (150), which itself can exist as a separate, discrete entity. This integrated system for process control contains a process supervisor procedure (130) (which is preferably the top-level procedure) which can define parameters for one or more controller systems (or control procedures). The supervisor procedure can also be configured as a modular software structure with modules which can be revised by a user at any time, without significantly interrupting the operation of the process supervisor. Users can define or redefine modules by editing highly constrained templates (115, 812).</p> |
