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1 edition of Generating Abstraction Hierarchies found in the catalog.

Generating Abstraction Hierarchies

an Automated Approach to Reducing Search in Planning

by Craig A. Knoblock

  • 190 Want to read
  • 24 Currently reading

Published by Springer US in Boston, MA .
Written in English

    Subjects:
  • Computer science,
  • Artificial intelligence

  • About the Edition

    Generating Abstraction Hierarchies presents a completely automated approach to generating abstractions for problem solving. The abstractions are generated using a tractable, domain-independent algorithm whose only inputs are the definition of a problem space and the problem to be solved and whose output is an abstraction hierarchy that is tailored to the particular problem. The algorithm generates abstraction hierarchies that satisfy the `ordered monotonicity" property, which guarantees that the structure of an abstract solution is not changed in the process of refining it. An abstraction hierarchy with this property allows a problem to be decomposed such that the solution in an abstract space can be held invariant while the remaining parts of a problem are solved. The algorithm for generating abstractions is implemented in a system called ALPINE, which generates abstractions for a hierarchical version of the PRODIGY problem solver. Generating Abstraction Hierarchies formally defines this hierarchical problem solving method, shows that under certain assumptions this method can reduce the size of a search space from exponential to linear in the solution size, and describes the implementation of this method in PRODIGY. The abstractions generated by ALPINE are tested in multiple domains on large problem sets and are shown to produce shorter solutions with significantly less search than problem solving without using abstraction. Generating Abstraction Hierarchies will be of interest to researchers in machine learning, planning and problem reformation.

    Edition Notes

    Statementby Craig A. Knoblock
    SeriesThe Springer International Series in Engineering and Computer Science, Knowledge Representation, Learning and Expert Systems -- 214, Springer International Series in Engineering and Computer Science, Knowledge Representation, Learning and Expert Systems -- 214.
    Classifications
    LC ClassificationsQ334-342, TJ210.2-211.495
    The Physical Object
    Format[electronic resource] :
    Pagination1 online resource (xv, 168 pages).
    Number of Pages168
    ID Numbers
    Open LibraryOL27040834M
    ISBN 101461363802, 1461531527
    ISBN 109781461363804, 9781461531524
    OCLC/WorldCa852788538

    In software engineering and computer science, abstraction is. the process of removing physical, spatial, or temporal details or attributes in the study of objects or systems in order to focus attention on details of higher importance, it is also very similar in nature to the process of generalization;; the creation of abstract concept-objects which are created by mirroring . Type Abstraction Hierarchies (a knowledge-base) are generated from the Navy database (section E) for query relaxation. The TAHs are then installed at CoBase The TAHs are then installed at CoBase Wesley W. Chu, Distinguished Professor: Bio; on their attributes and represented this knowledge into Type Abstraction Hierarchies to provide guidance in. Charles L. Owen The Power of Abstraction 3 Abstract In the innovator’s tool box, ab-straction is one of the most powerful tools. For the creative mind, it offers a way to step away from the mundane to find fresh ways to conceptualize. An Abstraction Ladder creates order through categori-zation. Used for innovation, it is a means for abstracting.


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Generating Abstraction Hierarchies by Craig A. Knoblock Download PDF EPUB FB2

Generating Abstraction Hierarchies: An Automated Approach to Reducing Search in Planning (The Springer International Series in Engineering and Computer Science)Cited by: Generating Abstraction Hierarchies formally defines this hierarchical problem solving method, shows that under certain assumptions this method can reduce the size of Generating Abstraction Hierarchies book search space from exponential to linear in the solution size, and describes the implementation of this method in PRODIGY.

Generating Abstraction Hierarchies book abstractions generated by ALPINE are tested in multiple domains on large Format: Paperback.

Generating Abstraction Hierarchies presents a completely automated approach to generating abstractions for problem solving. The abstractions are generated using a tractable, domain-independent algorithm whose only inputs are the definition of Brand: Springer US.

Generating Abstraction Hierarchies formally defines this hierarchical problem solving method, shows Generating Abstraction Hierarchies book under certain assumptions this method can reduce the size of a search space from exponential to linear in the solution size, and describes the implementation of this method in PRODIGY.

The abstractions generated by ALPINE are tested in multiple domains on large. Part of the Artificial Intelligence book series (AI) Abstract Having established a theoretical understanding of when hierarchical planning can improve planning efficiency, Generating Abstraction Hierarchies book now discuss how to ensure the downward refinement property, or the : Qiang Yang.

Generating Abstraction Hierarchies formally defines this hierarchical problem solving method, shows that under certain assumptions this method can reduce the size of a search space from exponential to linear in the solution size, and describes the implementation of this method in PRODIGY.

Generating Abstraction Hierarchies book Generating Abstraction Hierarchies presents a completely automated approach Generating Abstraction Hierarchies book generating abstractions for problem solving. Rating: (not yet rated) 0 with reviews - Be the first.

The abstraction hierarchy represent the domain of human work by multiple levels of means-end and part-whole abstractions. It is argued in the paper that the abstraction hierarchy suffer from both methodological and conceptual problems.

The problems are illustrated by concrete examples from the power plant Size: 58KB. Constructing Abstraction Hierarchies Using a Skill-Symbol Loop George Konidaris Departments of Computer Science and Electrical & Computer Engineering Duke University, Generating Abstraction Hierarchies book NC [email protected] Abstract We describe a framework for building abstraction hierarchies whereby an agent alternates skill- andCited by: 9.

Constructing Abstraction Hierarchies Using a Skill-Symbol Loop George Konidaris Departments of Computer Science and Electrical & Computer Engineering Duke University, Durham NC [email protected] Abstract We describe a framework for building abstraction hierarchies whereby an agent alternates skill- and representation-construction phases to.

Learning Hierarchies of Abstraction Spaces The advantage of a partial order is that the appropriate abstraction hierarchy depends on the problem to be solved, and the partial order allows the planner to select the abstraction hierarchy that is Generating Abstraction Hierarchies book appropriate for a Cited by: Generating Abstraction Hierarchies book This book identified several useful properties of abstraction hierarchies, presented a completely automated approach to generating abstractions based.

However, developing abstraction hierarchies is an area that is not well understood. Our research proposes a novel hierarchical abstraction methodology to plan effective engineering designs and processes. It provides a theoretically sound foundation to represent, abstract and stratify engineering design parameters and tasks according to.

The individual Abstraction Ladders for all of these, conjoined, create a two-dimensional, hierarchical Abstraction Structure (my term) with both width and depth ; and the housing problem can be reconceived by choice at a degree of abstraction most productive for innovation.

Released from the mental restrictions of conventional names and imagery. The book provides a clear, thorough coverage of key areas of classical AI planning.

Its main theme is to build more intelligence on a set of basic algorithms and representations for planning. It presents advanced techniques for plan generation using decomposition and plan merging and for analyzing and comparing planning : Springer-Verlag Berlin Heidelberg. Generating Account Hierarchies Data aggregation is available using the Roll-up views provided the administrator defines one or more hierarchies.

The application administrator typically defines a "default" hierarchy by associating accounts with one another using the parent field on a company form, or the subaccount view for child accounts. The algorithm generates abstraction hierarchies by dropping literals from the original problem definition.

It forms abstractions that satisfy the ordered monotonicity property, which guarantees. A hierarchy of graphical objects Defining a Console interface Chapter 9. Recursive Strategies Thinking recursively The Towers of Hanoi The subset-sum problem Generating permutations Graphical recursion Chapter Backtracking Algorithms Recursive backtracking in a maze Backtracking and games.

Research in Artificial Intelligence has been a forerunner in developing the most detailed and formalized theories that create consistent abstraction hierarchies for planning and problem solving. However, the representational methods to exploit these. In this paper, we present probabilistic abstraction hierarchies (PAH), a probabilisti-cally principled general framework for learning abstraction hierarchies from data which overcomes these difficulties.

We use a Bayesian approach, where the different models correspond to different abstraction hierarchies. The prior is designed to enforce our.

Ballard shows that the hierarchical organization of the brain has many parallels with the hierarchical organization of computing; as in silicon computing, the complexities of brain computation can be dramatically simplified when its computation is factored into different levels of g on several decades of progress in computational neuroscience, together.

4 Planning Using an Abstraction Hierarchy. Once an agent has constructed an abstraction hierarchy, it must be able to use it to rapidly find plans for new problems.

We formalize this process as the agent posing a plan query to the hierarchy, which should then be used to generate a plan for solving the problem described by the query. We adopt Cited by: 7.

A conceptual schema is a clear, easy to understand and exact representation of the semantics of an underlying universe of discourse. The role of such Cited by: Constructing Abstraction Hierarchies Using a Skill-Symbol Loop George Konidaris Departments of Computer Science and Electrical & Computer Engineering Duke University, Durham NC [email protected] Abstract We describe a framework for build-ing abstraction hierarchies whereby an agent alternates skill- and representation.

Levels of Abstraction in Nursing Knowledge Janie B. Butts and generate new theory” (Johnson & Webber,pp. 11–12). Nursing knowledge development and practice must be in a constant state of evolution so that nurses will be equipped to fulfi ll for the word Size: KB.

Identifying Problems and Generating Recommendations for Enhancing Complex Systems: Applying the Abstraction Hierarchy Framework as an Analytical Tool.

The process of identifying problems and generating recommendations for complex systems using conventional methods is usually conducted based on incompletely defined work by: -Choice 'B' is the correct answer.

In an abstraction hierarchy, higher levels of abstraction (the most general concepts) would be placed at the top and lower level abstractions (the more specific concepts) would be placed at the bottom.

Explanation of Distractors: Choice 'A' is incorrect. Java Abstract Classes and Methods. Data abstraction is the process of hiding certain details and showing only essential information to the user. Abstraction can be achieved with either abstract classes or interfaces (which you will learn more about in the next chapter).

The abstract keyword is a non-access modifier, used for classes and methods. in utility. Building hierarchies of categories at increas­ ing levels of abstraction, allows us to generate sets of categories with different maximal spans in utility. Several practical utility-based categorization methods, and auxiliary abstraction facilities, are embodied in a program named TUBA.

The program runs on the Ap­Cited by: 4. First, we propose a conceptual and modeling extension to Rasmussen's abstraction hierarchy from the point of view of design. We then use the modified abstraction hierarchy as the framework for the design of the controls and human-machine interface of.

Abstraction is a general concept which you can find in the real world as well as in OOP languages. Any objects in the real world, like your coffee machine, or classes in your current software project, that hide internal details provide an abstraction.

These abstractions make it a lot easier to handle complexity by splitting them into smaller parts. Programming Abstractions in C++ Eric S. Roberts and Julie Zelenski T his course reader has had an interesting evolutionary history that in som e w ays m irrors the genesis of the C + + language itself.

Just as B jarne S troustupÕs first version of C + + w as im plem ented on top of a C language base, this reader began its life as E ric R obertsÕs. "An abstraction" is the outcome of this process—a concept that acts as a common noun for all subordinate concepts, and connects any related concepts as a group, field, or category.

Conceptual abstractions may be formed by filtering the information content of a concept or an observable phenomenon. Chapter 3.

Abstraction and Hierarchy. The presentation so far has focused on objects and networks of objects. We have discussed how objects manage their internals and how they collaborate on larger tasks.

We have also seen fundamental recurring structures and patterns one finds in practical applications. The hierarchy continues downward to generate, in theory, 7, unique codes of the format A0A 0A0 (the second and third letter position allow 20 objects each).

Most library classification systems are also hierarchical. The book provides a clear, thorough coverage of key areas of classical AI planning. Its main theme is to build more intelligence on a set of basic algorithms and representations for planning. It presents advanced techniques for plan generation using decomposition and plan merging and for analyzing and comparing planning algorithms.

Hydrogen-Atom Abstraction. Hydrogen-atom abstraction is an elementary reaction that permeates the free-radical chemistry of carbohydrates. Because it is the final propagation step in many chain reactions, hydrogen-atom abstrac­tion often converts a carbon-centered radical into a.

A low-level graph abstraction Graph traversals Defining a Graph class Finding shortest paths Algorithms for searching the web Chapter Inheritance Simple inheritance A hierarchy of graphical shapes A class hierarchy for expressions Parsing an expression Multiple inheritance Chapter   An abstraction hierarchy over such a set is a tree such that the leaf nodes correspond to singleton sets containing individual k-grams, and the internal nodes correspond to abstractions or groupings of “similar” k-grams.

The procedure for constructing abstraction hierarchies is based on hierarchical agglomerative by: 5. Objective: This study adopts J.

Rasmussen's () abstraction hierarchy (AH) framework as an analytical tool to identify problems and pinpoint opportunities to enhance complex systems. Background: The process of identifying problems and generating recommendations for complex systems using conventional methods is usually conducted based on incompletely defined work Cited by:.

Abstraction Hierarchies for Conceptual Engineering Design. By Esra Aleisa Ph.D. Published: March 1st Esra Aleisa Pdf. (March 1st ). Abstraction Hierarchies for Conceptual Engineering Design, New Advanced Technologies, Aleksandar Lazinica, IntechOpen, DOI: / the world's leading publisher of Open Access books.

Built Author: Esra Aleisa.Data Abstraction. Object-oriented programming. Programming in Java download pdf largely based on building data types.

This style of programming is known as object-oriented programming, as it revolves around the concept of an object, an entity that holds a data type Java's primitive types we are largely confined to programs that operate on numbers, but with .Pavol Návrat, Hierarchies of ebook concepts: abstraction, generality, and beyond, ACM SIGCSE Bulletin, v n.3, p, Sept.

Ken Shumate, Layered virtual machine/object-oriented design, Proceedings of the fifth Washington Ada symposium on Ada, p, JulyTyson's Corner, Virginia, USACited by: