• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
1 - WordPress.com
1 - WordPress.com

... "question phrase/word + auxiliary verb + subject" (e.g. what are you doing?) asks about the identity of the thing or person referred to by the question phrase/word. Each of these patterns is a tool which allows us to achieve effects which would not otherwise be possible. We have to learn these tools ...
ContextFreePumpingLemma
ContextFreePumpingLemma

... • We also need to check that uv  L. Indeed, if uv= L, we can get a smaller parse tree for the same w by ignoring the productions “between the two As”. But we have chosen the smallest possible parse tree for w! Which leads to a ...
I Passed the Bra(!) Exam?
I Passed the Bra(!) Exam?

... rule-based ones, there has been a perceptible jump in the accuracy. However, even top of the line statistical parsers still produce rather poor figures. The current ballpark of average accuracy is 8085% (Collins, 1997; Charniak, 1999). In practical terms, it means that even for the texts of the same ...
Interpreting Manipulation Actions: a Cognitive Approach
Interpreting Manipulation Actions: a Cognitive Approach

... Context-free Grammar The Manipulation Grammar (Table 1) is presented to serve as the core reasoning module for parsing manipulation actions. ...
working backwards from modern language to proto
working backwards from modern language to proto

... or Flexible. The main breakthrough in achieving Hierarchical may be the grouping of words into headed units, and the application of structural rules to headed units as a whole, rather than to individual words (Jackendoff, 1999). It is possible to have a hierarchy of structures, without the same stru ...
Chapter 10 Syntax In the course of the preceding chapter, we moved
Chapter 10 Syntax In the course of the preceding chapter, we moved

... same type inside it. 4. This grammar should also be capable of revealing the basis of two other phenomena: first, how some superficially distinct sentences are closely related, and second, how some superficially similar sentences are ,in fact, distinct. Deep and surface structure Two superficially d ...
Context Free Grammars 10/28/2003 Reading: Chap 9, Jurafsky
Context Free Grammars 10/28/2003 Reading: Chap 9, Jurafsky

... Flights from Denver to Miami Flights from Denver to Miami in February Flights from Denver to Miami in February on a Friday Flights from Denver to Miami in February on a Friday under $300 Flights from Denver to Miami in February on a Friday under $300 with ...
Document
Document

... From Logic Forms to Axioms • WordNet glosses transformed into axioms, to enable automated reasoning • Specific rules to derive axioms for each part of speech: – Nouns: the noun definition consists of a genus and differentia. The generic axiom is: concept(x)  genus(x) & differentia(x). • E.g.: abbe ...
Categorial Grammar – Introduction
Categorial Grammar – Introduction

... wherein the horizontal lines beneath each functional type and its argument are indexed with the symbols ‘>’ or ‘<’ to mark whether the functional application operation that yields the type below the line is forward or backward, respectively. S ...
PSY 369: Psycholinguistics - Illinois State University Department of
PSY 369: Psycholinguistics - Illinois State University Department of

... The boy was bitten by the wolf The boy was bitten. (involves deletion) No evidence for more processing of the second sentence Some recent evidence or reactivation of moved constituent at the trace position ...
Omnivorous representation might lead to indigestion
Omnivorous representation might lead to indigestion

... The keynote article by Amaral and Roeper, henceforth A&R, attempts to provide a more explicit mechanism of the process of second language acquisition within the generative framework: The Multiple Grammars Theory. The question of exactly what happens when a linguistic property transferred from the na ...
2. Generative Grammar [Kompatibilitätsmodus]
2. Generative Grammar [Kompatibilitätsmodus]

... A language is necessary in order that speech should be intelligible and produce all its effects. But speech also is necessary in order that a language may be established. Historically, speech always takes precedence. How would we ever come to associate an idea with a verbal sound pattern, if we did ...
What is Syntax?
What is Syntax?

... generate same set of strings (weak equivalence) • Can have different grammars that have same set of derivation trees (string equivalence) ...
$doc.title

... We would need to resolve this ambiguity in some way if we were to admit expressions such as ‘p ∧ q ∨ q’. One approach would be to assign higher precedence to one or other of the binary operations ∧ and ∨. (This would correspond to the convention in evaluating expressions in ordinary arithmetic and a ...
Slide 1
Slide 1

... writing and even enhance its rigor and precision. Such informal language also helps you to connect with readers in a personal as well as an intellectual way. In our view, then, it is a mistake to assume that academic writing and everyday language are completely separate things, and that they can nev ...
The original LZ77 algorithm works as follows: • A phrase Tj starting
The original LZ77 algorithm works as follows: • A phrase Tj starting

... Later variants have improved the encoding of the phrases: • As with LZ78, having the extra symbol at the end of each phrase is wasteful, but there must still be a way to encode symbols that do not occur in the window. A common solution is to have two types of codes: hlength, distancei and hsymboli. ...
KS1 Grammar, Punctuation and Spelling Workshop for Parents
KS1 Grammar, Punctuation and Spelling Workshop for Parents

... • Know that words are ordered from left to right. • Know that we should use a capital letter for the initial sound in our names and for the personal pronoun ‘I’. • To separate words with spaces. • To expect written text to make sense and to check for meaning if it does not. • Be beginning to use ful ...
e30_15-16_7_learning-words-grammar-and
e30_15-16_7_learning-words-grammar-and

... Pronunciation ...
that Mary helped George
that Mary helped George

... in which elements ...
Here - MIT
Here - MIT

... • V is a finite set of terminals (all the Vocabulary items, words, e.g., Romney, dog) • R is a finite set of rules in the form: X → Y1…Yn, where X∈ N is a single nonterminal, and Yi∈N∪V for each Y1, n ≧0 (so the Yi comprise any string of terminals and nonterminals. We will include a special ‘empty s ...
intro
intro

... However, the right side increases by the ratio ((x+1)/x)2. When x=4, this ratio is 1.56. As x increases and approaches infinity, the ratio ((x+1)/x)2 approaches 1. This means the ratio gets smaller as x increases. Consequently, 1.56 is the largest that the right hand side will increase. Since 1.56 < ...
ppt - Department of Mathematics and Statistics
ppt - Department of Mathematics and Statistics

... However, the right side increases by the ratio ((x+1)/x)2. When x=4, this ratio is 1.56. As x increases and approaches infinity, the ratio ((x+1)/x)2 approaches 1. This means the ratio gets smaller as x increases. Consequently, 1.56 is the largest that the right hand side will increase. Since 1.56 < ...
Common errors in writing technical English papers
Common errors in writing technical English papers

...  Respectively must be used only with two lists of things which are being matched up one-to-one. If there are not two lists of things specified, then do not use it.  When you do use it, separate it from the sentence by commas.  “Serena Williams and Roger Federer won the women's and men's singles t ...
Lecture guide
Lecture guide

... example of such a dependency is question inversion. Consider the following sentence: “what did police put around upson?”. There is clearly a dependency between the words “what” and “put,” even though they are not adjacent. For example, the sentence “where did police put around upson?” is invalid, as ...
Таблица по истории теоретической грамматики
Таблица по истории теоретической грамматики

... modifiers had no distinct position in the sentence. ...
< 1 ... 3 4 5 6 7 8 9 >

Context-free grammar

In formal language theory, a context-free grammar (CFG)is a formal grammar in which every production rule is of the formV → wwhere V is a single nonterminal symbol, and w is a string of terminals and/or nonterminals (w can be empty). A formal grammar is considered ""context free"" when its production rules can be applied regardless of the context of a nonterminal. No matter which symbols surround it, the single nonterminal on the left hand side can always be replaced by the right hand side. This is what distinguishes it from a context-sensitive grammar.Languages generated by context-free grammars are known as context-free languages (CFL). Different context-free grammars can generate the same context-free language. It is important to distinguish properties of the language (intrinsic properties) from properties of a particular grammar (extrinsic properties). The language equality question (do two given context-free grammars generate the same language?) is undecidable.Context-free grammars arise in linguistics where they are used to describe the structure of sentences and words in natural language, and they were in fact invented by the linguist Noam Chomsky for this purpose, but have not really lived up to their original expectation. By contrast, in computer science, as the use of recursively defined concepts increased, they were used more and more. In an early application, grammars are used to describe the structure of programming languages. In a newer application, they are used in an essential part of the Extensible Markup Language (XML) called the Document Type Definition.In linguistics, some authors use the term phrase structure grammar to refer to context-free grammars, whereby phrase structure grammars are distinct from dependency grammars. In computer science, a popular notation for context-free grammars is Backus–Naur Form, or BNF.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report