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Reda Bakeer, Ardaman & Associates, Inc., [email protected] Spigolon, SJS, Inc., In memoriamTimothy Welp, US Army Engineer Research and Development Center, [email protected]
DREDGABL and GEOSITE Knowledge-Based Expert System
Geotechnical Decision Support Tools for Dredging
Artificial Intelligence (AI)
Computer software/hardware that mimics subjective & objective reasoning of human brains
Artificial Intelligence Applications
Puzzles & Games Expert Systems (ES) Knowledge Based
Expert System (KBES) Decision Support
Systems
Pattern Recognition
Neural Networks Fuzzy Logic Virtual Reality
Knowledge-Based Expert Systems
Preserve knowledge & experiences (subjective & objective) of experts in the field
User-friendly interface that allows for
interaction between the user & knowledge base
Can be relatively simple or very elaborate
May or may not have learning components Ability of knowledge to “grow” & decision to “improve” Explain why data is needed & how conclusions are
reached Include confidence/risk factors
Knowledge-Based Expert Systems Components:
Knowledge acquisition & validation
Knowledge coding, inference engine & user interface
Uses expert-derived rules for its reasoning
Incorporate & process judgment, experience, empirical rules of thumb, proven functional relationships & experimental evidence
More elaborate systems become Decision Support Systems (DDS)
Knowledge-Based Expert Systems
Applied to a wide variety of problem domains
Once a system is developed, it should be verified in real world by outside experts
Used to: Preserve & transfer knowledge Train new & unskilled workers Enhance decision making process (DSS)
Dredging KBESs GEOtechnical SITE Investigation Methods (GEOSITE) Geotechnical Factors in DREDGeABiLity
(DREDGABL)
DRP SJS, Inc. & 1990’s 2008-
2010
Dr. Jack Fowler
Dredging Research Program (DRP)Dredging Operations & Environmental Research Program (DOER)
GEOSITE & DREDGABL
Intended as a training/screening tool & not for use in formal engineering designs
Fully interactive & user friendly software for personal computers (FoxPro & Windows)
Developed through established literature & interviews with experts in the field (knowledge acquisition)
Verified through field trials & workshops Limited use by USACE in the 1990’s Contain detailed graphical assistance tools Used to provide guidance or as a training tool
GEOtechnical SITE Investigation Methods (GEOSITE)
Provides guidance from geotechnical experts for subsurface investigations for dredging projects
Assumes general knowledge of sediment types at site
Assists in selecting: Sediment sampling methods In-situ strength testing methods, considering all
appropriate sampling/testing method combinations Methods for accessing the sampling/testing depth Material identification tests Platforms suitable for fieldwork
Uses Confidence Factors & Utility Factors
GEOtechnical Factors in DREDGeABiLity (DREDGABL)
Serves as a geotechnical engineering consultant Provides guidance regarding “dredgeability” of
sediments described in the contract document Dredgeability is defined as the ease with which
an underwater soil or rock can be excavated, removed, transported & deposited using specific dredging equipment & methods
Contains a database option to store local knowledge within the user’s geographical area
GEOSITE & DREDGABL KBES
Computerized tools designed to enhance accessibility and quality of information & knowledge needed by decision makers in the dredging industry
Use of GEOSITE & DREDGABL A guide, or computerized mentor, for persons
lacking knowledge & experience in dredgeability analysis of geotechnical data, or geotechnical site investigations for dredging projects.
An educational aid in the training of new planners, estimators, administrators & operators
Assist geotechnical engineers & engineering geologists involved in dredging subsurface investigations
Peer review, where knowledgeable & experienced personnel can consult with other experts for review & to check their work
Questions
