generating finite state transducers for semi structured data extraction from the web pdf
Báo cáo khoa học: "Using Corpus Statistics on Entities to Improve Semi-supervised Relation Extraction from the Web" pot
... the patterns for the correct entity type, and by the patterns for all other entity types. The validator then returns Valid, if the number of times the entity was ex-tracted for the specified ... labeled data for one rela-tion, and then use the model for scoring the candi-dates of all other relations. Since the supervised training stage needs to be run only once, it is a part of the system ... occurrences. Then, the Instance Extractor uses the patterns to extract the candidate instances from the sentences. Finally, the Classifier assigns the confidence score to each extraction. We shall...
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Báo cáo khoa học: "Automatic Induction of Finite State Transducers for Simple Phonological Rules" pptx
... quential finite state transducers. Subsequential finite state transducers are a subtype of finite state transduc- ers with the following properties: 1. The transducer is deterministic, that is, there ... machine at a given state in terms of the next input symbol by generalizing from the arcs leaving the state. The decision trees classify the arcs leaving each state based on the arc's input ... tree to each state of the machine, describing the behavior of that state. For exam- ple, the decision tree for state 2 of the machine in Figure 1 is shown in Figure 8. Note that if the underlying...
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Tài liệu Báo cáo khoa học: "Parameter Estimation for Probabilistic Finite-State Transducers∗" doc
... derived from the paths.Crucially, §4 will show how the E step can accumu-late these counts effortlessly. We first explain theiruse by the M step, repeating the presentation of §2:• If the parameters ... operators to tweakthem, to apply them to speech lattices or other sets,and to combine them with linguistic resources.Unfortunately, there is a stumbling block: Wheredo the weights come from? After ... are the 17 weights in Fig. 1a, the M step reestimates the probabilities of the arcs from each state to be proportional to the expected numberof traversals of each arc (normalizing at each state to...
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Báo cáo khoa học: "Automatic Sanskrit Segmentizer Using Finite State Transducers" pdf
... next state is a final state then4: for all rules where I is the last characterof first word do5: S = next state from the start state onencountering X;6: Y = first character of the result of the rule;7: ... ex-hausted, but the current state is a final state, we goback to the start state with the remaining string as the input.885.1.1 Results The performance of this system measured in termsof the number ... written together. Moreover,before these components are joined, they undergo the euphonic changes. The components of a com-pound typically do not carry inflection or in otherwords they are the bound...
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Báo cáo khoa học: "Robust, Finite-State Parsing for Spoken Language Understanding" pdf
... records the information needed to build a bracketed parse-tree for any given branch. When partial-paths converge on the same state within the FSM they are scored heuris- tically, and all but the ... "net :state& quot; combina- tions that uniquely identify the location of that state within the FSM (see Figure 8). These "net :state& quot; names effectively represent a snap- shot of the ... regular grammar on a per- state basis. Within this framework the task of a recognizer is to choose the best phonetic path through the finite- state machine defined by the regular grammar. Out-of-vocabulary...
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Báo cáo khoa học: "A Cascaded Finite-State Parser for German" pot
... upper88.977.790.979.593.681.831.0Figure 2: Results for Finite- State Parseron Ideal, Lexicon and Tagger tags. The last col-umn of the table shows the percentage of com-pletely correct analyses of sentences. For the lower bound, ... non-deterministic transducers insert further syntacticstructure (e.g. adjective phrases, phrases for co-ordinated VPs and prepositions) and grammaticalroles3. The pertinent information is coded in the finite- state ... of underspecification. The idea is that such syntactically unresolvableambiguities are later resolved by expert disam-biguation modules. The performance of the finite- state parser has been...
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Báo cáo khoa học: "Semitic Morphological Analysis and Generation Using Finite State Transducers with Feature Structures" pot
... when the input to analysis or the output of generation is in standard Tigrinya or-thography. One of these is responsible for the in-sertion of the vowel 1 and for consonant gemina-tion (neither ... in the orthogra-phy); the other inserts a glottal stop before a word-initial vowel. The full orthographic FST consists of 22,313states and 118,927 arcs. The system handlesverbs in all of the ... putting together all ofthese constraints in a way that works is signifi-cant. Since the motivation for this project is pri-marily practical rather than theoretical, the mainachievement of the paper...
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Báo cáo khoa học: "A Cascaded Finite-State Parser for Syntactic Analysis of Swedish" potx
... The performance of the parser partly depends on the output of the tagger and the rest of the pre- processing software. Our way of dealing with how "correct" the performance of the parser ... body-part. The recognition is per- formed using finite- state recognizers based on trig- ger words, typical contexts, and typical predicates associated with the entities. The performance of the NE ... Bear, D. Israel, and M. Tyson. 1993. FASTUS: A Finite- State Proces- sor for Information Extraction from Real-World Text, In Proceedings of the IJCAI '93, France. Birn, J. 1998. Swedish...
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Báo cáo khoa học: "COMPACT REPRESENTATIONS BY FINITE-STATE TRANSDUCERS" pot
... these states using the left automaton associated with this transducer (equivalence in the sense of automata) and if the corresponding outputs from these states differ by the same prefix for ... output. These transitions would leave the final states and reach a newly created state which would become the single final state of the transducer. The minimal transducer associated with the 2- ... by the table above. It allows to compare the initial size of the file representing these dictionaries and the size of the equivalent transducers in memory (final size). The third line of the...
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Tài liệu Báo cáo khoa học: "Generalized Expectation Criteria for Semi-Supervised Learning of Conditional Random Fields" pdf
... all availablelabeled data. We sample instances for labeling ex-clusively from the training and development data, not from the testing data. We train a model using GEwith these estimated conditional ... highly effective. Intheir method, they collect contexts around all wordsin the corpus, then perform a SVD decomposition.They take the first 50 singular values for all words,and then if a word is ... nar-rowly only to the individual subpart, not to all placesin the data where the feature occurs.1In the experiments in this paper, we use λ = 0.001, whichwe tuned for best performance on the test...
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Báo cáo khoa học: "A DOM Tree Alignment Model for Mining Parallel Data from the Web" doc
... that, using the new web mining scheme, the web mining throughput is increased by 32%; (ii) The quality of the mined data is improved. By lever-aging the web pages’ HTML structures, the sen-tence ... English-Chinese parallel data from the web. The mining procedure is initiated by acquiring Chinese website list. We have downloaded about 300,000 URLs of Chinese websites from the web directories ... (1) Given a web site, the root page and web pages directly linked from the root page are downloaded. Then for each of the downloaded web page, all of its anchor texts (i.e. the hyperlinked...
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Báo cáo khoa học: "Tools for Multilingual Grammar-Based Translation on the Web" docx
... all the agreement rules. The process is shown in Figure 3. The one-word change generating the new set of documentscan be performed by editing any of the three represen-tations: the tree, the ... 2010 andruns for three years.1 Translation Needs for the Web The best-known translation tools on the web areGoogle translate1and Systran2. They are targeted toconsumers of web documents: ... as its value. The verbis, internally, an inflection table containing all formsof a verb. The function mkV derives all these forms from its argument string, which is the infinitive form. Itpredicts...
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AVAILABLE AND EMERGING TECHNOLOGIES FOR REDUCING GREENHOUSE GAS EMISSIONS FROM THE PULP AND PAPER MANUFACTURING INDUSTRY doc
... because the carbon originates from the wood or other cellulosic materials. The carbon in the spent pulping liquor exits the recovery furnace in two forms: (1) as CO2 emissions from the recovery ... band, heated by either steam or hot gas. The water from the paper is evaporated by the heat from this metal band. This drying technique has the potential to completely replace the drying section ... temperature-enthalpy graph, they reveal the location of the process pinch (the point of closest temperature approach), and the minimum thermodynamic heating and cooling requirements. These are called the energy...
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