If truth maintenance is a central part of your architecture, I recommend Building Problem Solvers, by Kenneth Forbus and Johan de Kleer. It's on Amazon:
http://www.amazon.com/Building-Problem-Solvers-Artificial-Intelligence/dp/02 62061570/ref=sr_1_1?ie=UTF8&qid=1307815663&sr=8-1 and you can find the source code for the truth maintenance systems described in the book here: http://www.qrg.northwestern.edu/BPS/readme.html As part of my PhD work, I developed a reasoning system based on the LTRE, a forward-chaining rule engine on top of a logic-based TMS that is described in Building Problem Solvers. Coming from this background, I continually find Jess to be a Swiss Army knife of capabilities. However, if the logical conditional in Jess is not sufficient for your architecture, you'll probably need to implement a separate TMS layer. The logic-based TMS, which does fast (but incomplete) Boolean constraint propagation, provides a good balance between expressivity and efficiency. The problem solver architectures presented in Building Problem Solvers use the rule engine's rules to construct a problem-specific dependency network, through which the TMS propagates truth values. For example, the CyclePad system http://www.qrg.northwestern.edu/projects/NSF/Cyclepad/aboutcp.html enables the user to assemble and analyze thermodynamic cycles from a palette of devices (turbines, pumps, heaters, throttles, coolers, etc). Once the user has completed the cycle design, CyclePad runs its knowledge base of rules to generate a dependency network that captures the relationships among the thermodynamic properties at the inlet and outlet of each device. The user can choose the working fluid for the system, and this imposes further logical dependencies. For example, water will condense at certain combinations of pressure and temperature. The user analyzes the system by making assumptions about thermodynamic properties that the system then propagates through the dependency network. -John -----Original Message----- From: Ernest Friedman-Hill [mailto:ejfr...@sandia.gov] Sent: Saturday, June 11, 2011 8:20 AM To: jess-users@sandia.gov Subject: Re: JESS: On the Performance of Logical Retractions On Jun 11, 2011, at 6:11 AM, Oliya wrote: > > But still I have a question: what type of truth maintenance is > supported in Jess? Can you provide links to more information please. The "logical" conditional element is the only form of truth maintenance in Jess. I thought you said you were already using it? > -------------------------------------------------------- Ernest Friedman-Hill Informatics & Decision Sciences, Sandia National Laboratories PO Box 969, MS 9012, Livermore, CA 94550 http://www.jessrules.com -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users y...@address.com' in the BODY of a message to majord...@sandia.gov, NOT to the list (use your own address!) List problems? Notify owner-jess-us...@sandia.gov. -------------------------------------------------------------------- -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users y...@address.com' in the BODY of a message to majord...@sandia.gov, NOT to the list (use your own address!) List problems? Notify owner-jess-us...@sandia.gov. --------------------------------------------------------------------
