the AQ21 program aims to perform natural induction, a process of generating inductive hypotheses in human-oriented forms that are easy to interpret and understand. this is achieved by employing a highly expressive rep...
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the AQ21 program aims to perform natural induction, a process of generating inductive hypotheses in human-oriented forms that are easy to interpret and understand. this is achieved by employing a highly expressive representation language, attributional calculus, whose statements resemble natural language descriptions. this paper focuses on the pattern discovery mode of AQ21, which produces attributional rules that capture strong regularities in the data, but may not be fully consistent or complete with regard to the training data. AQ21 integrates several novel features, such as optimizing patterns according to multiple criteria, learning attributional rules with exceptions, generating optimized sets of alternative hypotheses, and handling data with unknown, irrelevant and/or non-applicable meta-values
the paper discusses the method for determining radiation pattern of an array mounted on a conical structure. Two types of antenna elements are considered: waveguide openings and microstrip patch antennas. the analysis...
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ISBN:
(纸本)9536037440
the paper discusses the method for determining radiation pattern of an array mounted on a conical structure. Two types of antenna elements are considered: waveguide openings and microstrip patch antennas. the analysis method is based on the modal representation of the EM field, i.e. the solution procedure takes advantage of representing the fields as a sum of spherical harmonics with unknown amplitudes. By introducing normalized associate Legendre functions, together with pre-calculation of terms that depend only on conical geometry, an accurate and efficient program has been developed. A comparison was made between the calculated radiation pattern and the measurements of different waveguide and patch array configurations. All the considered results showed high accuracy of the developed method.
programmers have come to expect better integration between databases and the programming languagesthey use. While this trend continues unabated, database concurrency scheduling has remained blind to the *** propose t...
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We take a typical scientific data analysis task, the analysis of planetary nebulae images taken by the Hubble Space Telescope, and describe how program synthesis can be used to generate the necessary analysis programs...
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ISBN:
(纸本)0769520359
We take a typical scientific data analysis task, the analysis of planetary nebulae images taken by the Hubble Space Telescope, and describe how program synthesis can be used to generate the necessary analysis programs from high-level models. We describe the AUTOBAYES synthesis system, discuss its fully declarative specification language, and present the automatic program derivation starting withthe scientists' original analysis [7].
Model Driven Architecture (MDA), which supports the development of software-intensive systems through the transformation of models to executable components and applications, requires a standard way to express transfor...
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ISBN:
(纸本)1581137516
Model Driven Architecture (MDA), which supports the development of software-intensive systems through the transformation of models to executable components and applications, requires a standard way to express transformations. the approach developed by this research focuses on defining pattern-based transformation at the metamodel level. this research has two primary objectives. the first objective is to support systematic application of patterns. the use of patterns as model building blocks (through pattern-based transformations) helps raise the level of abstraction at which systems are developed. the second research objective is to support controlled model evolution by specifying pattern-based transformations at the metamodel level.
At the International Test conference 2002 several low cost test solutions were presented. All of these solutions promised to establish a close link between Automatic Test pattern Generation, ATE based testing and Faul...
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ISBN:
(纸本)0769519083
At the International Test conference 2002 several low cost test solutions were presented. All of these solutions promised to establish a close link between Automatic Test pattern Generation, ATE based testing and Fault Diagnosis/Analysis by using the IEEE 1450 Standard Test Interface Language (STIL). However, the reality is different. this paper describes the integration of a STIL based tester into the standard Motorola test program generation flow. the expected benefits of this very low cost test approach are measured against the problems which had to be solved in order to achieve a high degree of automation. All remaining problems described in this paper need to be addressed by the EDA vendors, the ATE companies and the different STIL committees. Only when these issues are resolved STIL will become a success for the test world.
作者:
Leitao, AMUniv Tecn Lisboa
Dept Informat Engn Grp Inteligencia Artificial Inst Super Tecn P-1049001 Lisbon Portugal
Refactoring tools are extremely important to prevent errors in legacy systems restructuring. Unfortunately, to be effective, these tools require huge computer resources that cause unacceptable inefficiencies or limit ...
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ISBN:
(纸本)0769514383
Refactoring tools are extremely important to prevent errors in legacy systems restructuring. Unfortunately, to be effective, these tools require huge computer resources that cause unacceptable inefficiencies or limit the size of the restructured programs or even the programming language expressiveness. Previous approaches also made it difficult for the programmer to extend the tool with new refactoring operations. patternlanguages exist that describe several techniques to refactor a program. However they are usually described at a very abstract level that is understandable only by a human programmer and that is hard to implement in refactoring tools. We present a formal pattern language that solves these problems. the pattern language is used to define refactoring operations that can be as powerful as is computationally possible but that are very easy to write. the language simplicity also allows for the automatic learning of new refactoring operations from the observation of manual code transformations.
the UTACLIR query translation system was originally designed for the CLEF 2000 and 2001 campaigns. In the two first years the query translation application consisted of separate programs based on common translation pr...
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the proceedings contain 18 papers. the special focus in this conference is on programming languages and Systems. the topics include: Concurrent constraint programming based on functional programming;a bisimulation met...
ISBN:
(纸本)3540643028
the proceedings contain 18 papers. the special focus in this conference is on programming languages and Systems. the topics include: Concurrent constraint programming based on functional programming;a bisimulation method for cryptographic protocols;a polyvariant binding-time analysis for off-line partial deduction;complexity of concrete type-inference in the presence of exceptions;an efficient new fixpoint algorithm for distributive constraint systems;reasoning about classes in object-oriented languages;language primitives and type discipline for structured communication-based programming;recursive object types in a logic of object-oriented programs;about modes and states for reactive systems;building a bridge between pointer aliases and program dependences;a complete declarative debugger of missing answers;systematic change of data representation and a generic framework for specialization.
the paper presents the initial results of the Surprise project. Surprise is an Essi Dissemination action, aimed at identifying and disseminating key factors in adopting or running a company-wide software reuse program...
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the paper presents the initial results of the Surprise project. Surprise is an Essi Dissemination action, aimed at identifying and disseminating key factors in adopting or running a company-wide software reuse program. Key factors are derived from empirical evidence of best reuse practices, as emerged from an extensive survey of recent european software reuse projects: around 18 reuse projects performed in Europe from 1994 to 1997 were analysed. A number of key issues that determine the software reuse policy have been identified: management, organisation, human aspects, processes, repository. For each of them, success and failure examples are analysed, main risks and success factors are detailed.
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