In the therapy of premature infants with respiratory distress syndrome, their arterial oxygen partial pressure is routinely controlled by adjusting the concentration of oxygen (F/sub 1/O/sub 2/) in the air they inspir...
In the therapy of premature infants with respiratory distress syndrome, their arterial oxygen partial pressure is routinely controlled by adjusting the concentration of oxygen (F/sub 1/O/sub 2/) in the air they inspire. For more severe cases where the patient is unable to breathe unaided, assisted ventilation is introduced to maintain the oxygen supply and carbon dioxide elimination. Multiple ventilator-controlled parameters, including peak inspiratory pressure, positive end-expiratory pressure, ventilation frequency, inspiratory to expiratory duration ratio, may be altered skilfully to optimize gas exchange. Various rules have been derived by paediatritions based on their clinical experiences. In the paper the authors discuss an expert ventilator manager combined with a real-time generalised predictive controller. The objective of the system is to control both blood oxygen and carbon dioxide pressures within their prespecified ranges by adjusting F/sub 1/O/sub 2/ and four ventilator factors.< >
The basis of a comprehensive real-time knowledgebased system for control structure design and supervisory control is developed using the MUSE AT toolkit. Representation of control engineering knowledge as procedural ...
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The basis of a comprehensive real-time knowledgebased system for control structure design and supervisory control is developed using the MUSE AT toolkit. Representation of control engineering knowledge as procedural code in an object-based structure ensures that the knowledgebase is easily understood and modified by domain experts. The simple learning capability that has been implemented has proved to be extremely useful and is being developed further as part of continuing research in this area. It is also hoped to extend the capabilities of the supervisory modules particularly in dealing with loop interactions, the prediction and diagnosis of faults and the provision of an intelligent operator interface.< >
Describes a communication framework which enables knowledge-based computing resources to act cooperatively over a high bandwidth data path. The system has been designed to allow unrestricted access to an agent's l...
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Describes a communication framework which enables knowledge-based computing resources to act cooperatively over a high bandwidth data path. The system has been designed to allow unrestricted access to an agent's local knowledgebase by a well-defined interface. It also minimises unnecessary traffic through the establishment of an automatically maintained knowledgebase in a central serving node of a star-connected architecture. This knowledgebase allows a client expert to treat the remainder of the system as an homogeneous knowledge-whole, avoiding the necessity of local, a priori, meta-knowledge, whilst retaining efficiency of knowledge search. A client expert maintains a local knowledgebase or, more properly, belief base, which is structured in schemata form. The notion of procedural attachment to schema slots is implemented, as is the concept of assumptive dependency. The fact that more than one expert exists in a system introduces the problem of conflict resolution, where two or more experts may present conflicting truth-functional assertions. A simple pattern-matching query language is extended via two operators, allowing simple combination of belief. The system operates using the TCP-IP protocols over a proprietary CSMA/CD broadband local-area network. The high-level interface is implemented in CommonLisp.< >
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