HVAC Control in the New Millennium.pdf - HVAC.Amickracing

HVAC Control in the New Millenniumsystem were used to pronounce Spanish or French, it would be hard torecognize what is being said. Each spoken language has its own combinationof phonemes. Programming the SP0256-AL2 involves sending aseries of addresses to the IC. These addresses must include phonemesfor each word, including the pauses within each word and the pausesbetween words. User-defined speeches consist of machine language instructionplaced around the phoneme addresses. Speech or voice synthesizersare available for personal computers. Table 6-2 shows a list ofstored words for digitized voice systems.Table 6-2. Typical Stored Words for Digitized Voice System————————————————————————————————WordHexadecimalAddress————————————————————————————————Emergency 23End 24Enter 25Entry 26Evacuate 28Exit 29Fail2AFailure2B————————————————————————————————Expert SystemsExpert systems mimic the tasks usually carried out by experts. Theexpertise of these systems is confined to a well-defined area. Unlikehumans, these systems lack common sense and cannot extrapolate theirknowledge beyond their narrow domain of expertise. Expert systems actlike a storehouse of knowledge with ways of retrieving this knowledgeto solve a particular problem (Figure 6-3).An expert system is a computer program that has some informationthat helps it to make a decision. One simple example is a troubleshootingtable given in a product manual. A set of procedures for©2001 by The Fairmont Press, Inc. All rights reserved.