Knowledge-based system overview

An overview of single-loop CPM is presented in Section 9.1. Section 9.2 surveys CPM tools for multivariable controllers. Monitoring of MPC performance and a case study based on MPC of an evaporator model and a supervisory knowledge-based system (KBS) is presented in Section 9.3 to illustrate the methodology. The extension of CPM to web and sheet processes is discussed in Section 10.3. 

This chapter provides an overview of expert-system verification and validation (V V) techniques. Several methods are presented. First, many of the conventional software V V techniques such as requirements analysis and unit testing can be applied to expert-system development. Second, an expert-system developer can use automated tools to test rule consistency and structure. A more viable alternative, however, is for the developer to create his own set of consistency and completeness tests. Finally, a developer should rely on qualitative judgment to determine the validity of a knowledge base. This judgment could include expert opinion as well as specialized tests designed to determine knowledge-base certification. The chapter suggests that methods should be combined into an optimal mix in order to best undertake V V. 

Overview. The CORA expert system has gone through two major phases in its development. The first-phase deliverable was a prototype system. The knowledge bases and explanation facility were written using the Production Rule Language (PRL) of Insight 2+. Additional user interface and reporting capabilities were developed in dBASE III+ and Nantucket Clipper. 

This review will present an overview of current molecular mechanics techniques and discuss some of their limitations. We will then look at knowledge-based protein prediction strategies and examine the incorporation of such empirical rules into refinement methodologies for model protein systems. More comprehensive reviews of molecular dynamics simulations, knowledge-based protein modeling, and protein folding simulations are available. - " ... 

In the following we limit to an overview of the most significant CD-based photoactivable nanostructured systems able to release singlet oxygen and/or NO. The role of the CD in the multicomponent assembly and in the optimization of the system performance will he evidenced. To our knowledge no photoactivable prodrug systems with CDs have yet been reported. 

Another important requirement for the development of new polymer processes based on SCCO2 is knowledge about the phase behavior of the mixture involved, which enables the process variables to be tuned properly to achieve maximum process efficiency. Determining parameters in the phase behavior of a system are the solvent quality, the molecular weight, chain branching, and chemical architecture of the polymer, as well as the effect of endgroups and the addition of a cosolvent or an antisolvent An overview of the available literature on the phase behavior of polymers in supercritical fluids has been published by Kirby and McHugh [50]. 

The proposed system has three functions (1) accuracy evaluation, (2) accuracy data accumulation, and (3) search and reuse of accuracy data. The objective of the study shown in this section is to build a method for identifying knowledge, knowhow and techniques in the field based on the data managed by the developed system and evaluated by the three dimensional measured data in the ship construction process. The overview of the whole system is shown in Fig. 23.10. All types of data are stored in the database and, as well, the metadata is assigned to the data. Any data stored in the system can be reachable efficiently thanks to the metadata. 

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