Ripple Down Rules (RDR) is a knowledge acquisition method which constrains the interactions between the expert and a shell to acquire only correct knowledge. Although RDR works well, it is only suitable for the problem of providing a single classification for a set of data. Multiple Classification Ripple Down Rules (MCRDR) is an extension of RDR which allows multiple independent classifications...

A computer system which aids computer engineers in fault diagnosis is described. The system, called CRIB (Computer Retrieval Incidence Bank) is shown to fit into the class of pattern-directed inference systems. Emphasis is placed on the "before" and "after" phases of system generation and it is shown why, to be called an expert system, these phases are important. The forms of knowledge used in ...

Using harmonic differential quadrature (HDQ) method, nonlinear vibrations and instability of a smart composite cylindrical shell made from piezoelectric polymer of polyvinylidene fluoride (PVDF) reinforced with boron nitride nanotubes (BNNTs) are investigated while clamped at both ends and subjected to combined electro-thermo-mechanical loads and conveying a viscous-fluid. The mathematical mode...

introduction bacterial meningitis is a known infectious disease which occurs at early ages and should be promptly diagnosed and treated. bacterial and aseptic meningitis are hard to be distinguished. therefore, physicians should be highly informed and experienced in this area. the main aim of this study was to suggest a system for distinguishing between bacterial and aseptic meningitis, using f...

Rule based systems or production rule languages have become an established means of encoding expertise 2]. The evaluation of satisfaction of a set of production rules (match phase in the inference cycle) is computationally expensive 2]. RETE 1] and TREAT 3] are two algorithms that perform this evaluation eeciently. The complexity of these algorithms is O(W C), where W is the number of working m...

Expert system (ES) is a branch of artificial intelligence (AI) that used to manage different problems by making use interactive computer-based decision-making process. It uses both factual information and heuristics resolve the complicated issues in specific domain. The architecture expert was analyzed found it includes several parts such as user interface, knowledge base, working memory, infer...

The Experimental Advanced Design Advisor (XAIDA) is a system for the development of computer-based maintenance training. XAIDA acquires knowledge of a device from a subject matter expert and applies common maintenance-training procedures to generate interactive training from the description. XAIDA provides maintenance training in four areas: the physical characteristics of a device, its theory ...

An approach to the diagnostic type expert systems design based on the special matrix representation of fuzzy predicates in the attribute model of the problem domain is presented. Intensive representation of predicates by means of sectional matrices is an analogue of the conjunctive normal form. Rules, positive examples and negative examples (in general, all fuzzy) can be used to form knowledge ...

Today, expert systems are widely applied in medicine for prognosis, diagnosis, checkup, and treatment of various kinds of diseases. A comprehensive system for the checkup and treatment of different types of diabetes is still lacking. This paper reports development of such a system, its validation, and its utility in facilitating medical decision-making and supporting self-care.

A computer system which a i d s computer e n g i n eers i n f a u l t d i a g n o s i s i s d e s c r i b e d . The sys tem, c a l l e d CRIB (Computer R e t r i e v a l I nc idence Bank) i s shown t o f i t i n t o the c l a s s o f p a t t e r n d i r e c t e d i n f e r e n c e sys tems. Emphasis is p laced on the " b e f o r e " and " a f t e r " phases o f system g e n e r a t i o n and i ...