Chapter 3. Proposed methodology
Assumption
l In the case when the assumption of a xx seems to be too restrictive or inadequate, the formulation with Fuzzy termination time, i.e. given by a fuzzy set in the space of control stages, may be applied.
l We assume here the fuzzy constraints to be state dependent, and the fuzzy goal to be the same for all the control states, xx, which stems from the problems nature.
l An approach to the solution of this problem is presented under the assumption that the sampling rate Decision can be made prior to the execution of the experiment, as opposed to being made while the experiment is in progress.
l Another assumption made above is that there are precise odds at which the expert is indifferent.
l Main simplifying assumptions are:
l This, in our view, is a questionable assumption.
Outline / Structure / Module
l An outline of the research
l Information is incorporated within the scheme
l Is built into ... structure
l A nice modular structure.
l The principles of ... are applied as modularized criteria
Classification
l A xx system comprises three main components:
l Must decompose the original .. into a set of ..
l Consists of the following steps:
l This is summarized in the following steps:
l Can be broadly classified into the following areas:
l Can be characterized by its function of effectively processing the
l Can allow further breadth of application of ...into more
l The following steps should be followed
l xx can be classified by a different ways.
l Based on the xx, one may classify xx into the following:
l This catalog may change due to wear, breakage, and purchasing.
System
l Unlike many conventional program, expert systems do not usually deal wit
h problem for which there is clearly a right or wrong answer.
l The system consists of both ... and ...
l The system has a hierarchical modular architecture organized on three levels.
l expert system domains are area of expertise
l To develop a xx system for xx, the following factors must be considered:
l The system has been developed / designed to determine
l The system has proven to be able to
l The domain in which an expert system operates is a particular domain
l The system comprises a ... with
l The system is [feature-oriented ] / based on the ... technique
l The system environment must be relatively stable
l The system is utilized to generate, load, store, update and retrieve ...
l The development of a xx system has two stages: xx stage and xx stage.
l The most essential part of .. system is the ...
l The successful developments in ESs have made them an important tool in the development of
l An automated system was developed for
l In this case, the system can be considered to be generative.
l An interactive automatic ... system
l A .. is commonly thought of as a truly integrated .. system
l Should be capable of being generated from a ... system
l xx is an important part of the integrated system.
l The model consists of four rule bases, each of which addresses a separate problem in the hierarchy of scheduling decision.
l The rule bases are linked to each other in a chin like manner in the sense that the consequent of one rule base constitutes a part of the antecedent of the next rule base.
l The rule base consists of all possible combinations of the linguistic terms associated with the linguistic variable of the antecedent of a rule.
Computer System
l The system has been implemented using Prolog language in an MS DOS environment. Prolog was chosen because it offers a well known and flexible environment in which fuzzy reasoning may be easily implemented.
l The current version of the xx program when compiled with WATFOR77 result
s in an executable code of about 270K bytes. Typical run time, when run on a
XX computer (an IBM compatible machine) operating at 4.77 Mhz with 640K RAM, ranges from 10 min to 2h, depending on the size (or complexity) of the problem.
l Time consuming procedures have been implemented in C language and directly linked to the Prolog environment.
l The xx process, once the xxs data has been entered, requires approximately 180 seconds.
l It should be noted that the computation was done with a 20 Hhz, 80386
209;based microcomputer equipped with a 80387 math co processor.
l The computer programs used for the analyses, one based on the xx method and the other based on the new method, were written in FORTRAN with a compiler that supports the math co processor.
l Lisp, Prolog give maximum flexibility but also maximizes development time.
l Internal representation is the way a model is represented in the computer.
l An interactive menu-driven procedure is used in this study
l Shell can be develop very fast at the cost of time fairly severe limitations.
l While there is no measurable saving of time for the case involving five criteria, the saving is dramatic for the case involving 10 criteria -- the computation time reduces from 10 hr 40 min to about 1 min.
l This combination is being implemented in an objected oriented programming environment (Smalltalk 80 system) to solve problems encountered in construction xxx.