unification with lazy nonredundant copying

... Conclusion The lazy- incremental copying (LIC) method used for the unification algorithm combines incremen- tal copying with lazy copying to achieve structure sharing. It eliminates redundant copying ... minimize the amount of necessary copying. Lazy In- cremental Copying (LIC) is presented as a new solution to the copying problem. It synthesizes ideas of lazy copying with the notion of chronological ... the argument DGs. Incremental Copying Wroblewski's nondestructive graph unification with incremental copying eliminates early copy- ing and avoids over copying. His method pro- duces...

Ngày tải lên: 17/03/2014, 08:20

... there is a highly tractable algorithm for the unification of HoXF's. 1. PRELIMINARY CONCEPTS 1.1 Unification- based grammar formalisms Unification- based grammar formalisms constitute ... not yet actually part of it. The root node is denoted by ®, and nodes with value T are denoted with a Note that paths with common virtual end labels (e.g., AA and B) are not coalesced; virtual ... queue. In other words, we perform a unification to match common in- formation, and then continue with the inference pro- cess. 4.6 The complexity of the unification algo- rithm Define the...

Ngày tải lên: 22/02/2014, 10:20

... to understand. Parsing with term-based internal representations is more efficient than parsing with graph-based representations. Therefore, it is effective to translate unification grammar formalism ... represents a disjunct. 3.2 Unification by Logical Constraint Transformation Unification of DFSs corresponds to logical constraint satisfaction. For example, the unification of DFSs p(X) and ... D6rre and Andreas Eisele. 1990. Feature logic with disjunctive unification. In COLING-90, vol- ume 2, pages 100-105. A. Eisele and J. D6rre. 1988. Unification of disjunctive feature descriptions....

Ngày tải lên: 20/02/2014, 18:20

... realistic, complex unification- based gram- mars: in particular, with grammars admitting less ambiguity parse time will tend to increase more slowly with increasing input length, and also with smaller ... given point with rules with the same number of daughters, the packed sequences can be formed into higher-level constituents as they stand without further processing. However, in the unification ... made. Other research directed towards improving the throughput of unification- based parsing sys- tems has been concerned with the unification oper- ation itself, which can consume up to 90% of...

Ngày tải lên: 20/02/2014, 21:20

... equivalent Reductions with the subject John to yield S one with its ground np type, and one with its raised type, s/(s~np). Only one of these is effected, because of a detail dealt with in the next ... label is associated with one and only one value We use round brackets to def'me sets, and we notate features as [label value]. We refer to variables with symbols starting with capital letters, ... and to labels and constants with symbols start- ing with lower-case letters. The following is an example of a dag: (7) ( [a e] [b ([c x] [d f])]) Like other unification based grammars,...

Ngày tải lên: 17/03/2014, 20:20

... processed in a unification- based framework with large-coverage gram- mars and how from their usage lexi- cal entries are extracted. To keep the time and space usage during parsing within bounds, ... acquired lexical entries, and the efficiency with which parsing with unknown words takes place. We have already discussed where the ambiguity arises with unknown words. One of the goals that we ... importance of the problem. For unification- based implementations, which often refer to linguistic theories and are therefore rich in information, one approach to deal with un- known words has been...

Ngày tải lên: 17/03/2014, 22:20

... J l~ Unification • Copying [] Other I " Figure 7. Relative Cost of Operations with Lazy Unification Lazy Unification copies less than 7% of the nodes copied under eager unification. ... EFFECTIVENESS OF LAZY UNIFICATION Lazy Unification results in an impressive reduction to the amount of copying during parsing. This in turn reduces the overall slice of parse time consumed by copying ... real copying than reversible unification. Let us look again at DAG a in Figure 2 and discuss a potential problem with lazy unification as described thus far. Let us suppose that through unification...

Ngày tải lên: 24/03/2014, 02:20

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... DISTRIBUTED AUTOMATION AND CONTROL WITH IEC 61499 JHC/2001-04-03 p. 18 Open Distributed Automation and Control with IEC 61499 Open Distributed Automation and Control with IEC 61499 • Background • ... IEC 61499 JHC/2001-04-03 p. 2 Open Distributed Automation and Control with IEC 61499 Open Distributed Automation and Control with IEC 61499 • Background • Architecture • Object Models • Software ... OPEN DISTRIBUTED AUTOMATION AND CONTROL WITH IEC 61499 JHC/2001-04-03 p. 20 Software Tool Models Software Tool Models OPEN DISTRIBUTED AUTOMATION AND CONTROL WITH IEC 61499 JHC/2001-04-03 p. 2 Open...

Ngày tải lên: 20/08/2012, 11:15

... book. If you are not familiar with Ant, we rec- ommend you check out Java Development with Ant by Erik Hatcher and Steve Loughran (Manning, 2002) or Extreme Programming with Ant by Glenn Niemeyer and ... 26 Download at Boykma.Com Chapter 14: Charting with JFreeChart We apply the open source JFreeChart project to provide professional data-charting capabilities within a portlet. Chapter 15: Content Management ... . . . . . . . . . . . 5 Building Portlets with the Portlet API . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Providing Technical Solutions with Portals . . . . . . . . . . . . . . ....

Ngày tải lên: 20/08/2012, 11:54

... to share reports with large numbers of users. In Chapter 5, you’ll create an A SP.NET web site project with VS RS and host the report using the ReportViewer control on the page. With VS RS, you ... server with little effort. Because RDL is XML based, it is easy for third-party vendors to come up with RS exten- sions. For example, how about printing a barcode? Well, that’s easy enough with ... Third-Party Tools and Having Fun with RS This chapter will highlight the use of third-party tools integrated with client-side RS. You’ll see how easy it is to create reports with graphical barcodes....

Ngày tải lên: 20/08/2012, 13:42

... 64 Adding comments within CSS . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Compatible style blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Text Formatting with CSS . ... . . . . . . . . . . . . . 278 Hide Containers with the Visibility: Attribute . . . . . . . . . . . . . . . . . . . . . 279 Controlling visibility with JavaScript . . . . . . . . . . . . . . . ... 13: Site Development with Weblogs . . . . . . . . . . . . . . . . . 293 What Is a Weblog? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294 Working with a Weblog . . . ....

Ngày tải lên: 27/08/2012, 09:03