the unsupervised acquisition of a lexicon from continuous speech
Tài liệu Báo cáo khoa học: "Learning the Latent Semantics of a Concept from its Definition" pptx
... link the senses acrossdictionaries, hence Wik is only used as augmenteddata for WMF to better learn the semantics of words.All data is tokenized, POS tagged (Toutanova et al.,2003) and lemmatized, ... this case, many senses will share the same latent semantics profile, as long as they are in the same topic/domain.To solve the sparsity issue we use missing wordsas negative evidence of latent ... (adjectives and adverbs) do not have a taxonomic representation structure. For example, the jcn similarity measure (Jiang and Conrath, 1997)computes the sense pair similarity score based on the information...
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Tài liệu Báo cáo khoa học: "Using adaptor grammars to identify synergies in the unsupervised acquisition of linguistic structure" docx
... application of adaptorgrammars, since the grammar can learn the possibleonset and coda clusters, rather than requiring themto be stipulated in the grammar.In the unigram syllable adaptor grammar shownin ... advance, in an adaptor grammar the subtrees, aswell as their probabilities, are learnt from the train-ing data. In order to make parsing and inferencetractable we require the leaves of these ... probability of the subtrees rooted in a specifiedsubset M of the nonterminals known as the adaptednonterminals.Adaptor grammars achieve this by associatingeach adapted nonterminal A ∈ M with a...
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Báo cáo khoa học: "Towards the Unsupervised Acquisition of Discourse Relations" pptx
... InstituteUniversity of Southern California4676 Admiralty Way, Marina del Rey, CA 90292chiarcos@daad-alumni.deAbstractThis paper describes a novel approach towards the empirical approximation of discourse ... Triples can be easily acquired from automaticallyparsed corpora. While the relation word is usuallypart of the utterance that represents the source of the relation, determining the appropriate target ... necessary todevelop operationalizable theories, and, within a su-pervised approach, large amounts of annotated train-ing data. To facilitate manual annotation, weaklysupervised or unsupervised...
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Báo cáo khoa học: "Acquiring a Lexicon from Unsegmented Speech" potx
... and assume that learning takes place in an environment where simple semantic representations of the speech intent are available to the acquisition mechanism. For example, we approximate the ... interested in how a lexicon of discrete words can be acquired from continuous speech, a prob- lem fundamental both to child language acquisition and to the automated induction of computer speech recognition ... work-in-progress on the ma- chine acquisition of a lexicon from sen- tences that are each an unsegmented phone sequence paired with a primitive represen- tation of meaning. A simple exploratory algorithm...
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Tài liệu Báo cáo khoa học: Suppressed catalytic efficiency of plasmin in the presence of long-chain fatty acids Identification of kinetic parameters from continuous enzymatic assay with Monte Carlo simulation ppt
... iscomposed of the catalytic domain only [11]. At a satu-rating concentration of Spectrozyme-PL, all three fattyacids affected the activity of miniplasmin in the samemanner as that of plasmin; apparent ... arachidonate (AA)or 175 lM stearate (SA), was measured. The mean and standard deviation values of four measurements are presented.Fatty acids as plasmin inhibitors A. Tanka-Salamon et al.1280 ... presence of fatty acids. The values of kpand Kmwere determined from the amidolyticassay of plasmin activity, according to Model I, in the presence of oleate (OA) and arachidonate (AA), or, according...
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Tài liệu Báo cáo Y học: Thermostability of manganese- and iron-superoxide dismutases from Escherichia coli is determined by the characteristic position of a glutamine residue pdf
... purchased from Pharmacia Biotech (Vienna, Austria).Visualization and analysis of molecular structuresMolecular structures whose coordinates were obtained from the RCSB database were visualized ... Peplow, F. Yamakura and T. Matsumoto for the analyses of iron and manganese in protein samples. We also wish tothank H. Steinman for the gift of E. coli OX32 6A. We finally thank MrM. Farrugia for ... helper phage (Stratagene). One microgram wasutilized in mutagenesis reactions together with oligonucleo-tides ECF-Q69G d(5¢-AACAACGCAGCTGGGCTCTGGAACCAT), ECF -A1 41Q d(5¢-TCAACCTCTAACCAGGCTACTCCGCTG)...
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Tài liệu Báo cáo Y học: Identification of a set of genes involved in the biosynthesis of the aminonucleoside moiety of antibiotic A201A from Streptomyces capreolus pdf
... betweenard1 and ard2 are part of the ata cluster, ata12 and ataPKS1should also pertain to it. Further sequencing of the atacluster could provide an insight into the biosyntheticpathway of the other ... comprise a large region of a putative A2 0 1A biosynthetic (ata) gene cluster. The sequence of the 7 kbupstream of ard1 towards ard2 reveals seven consecutiveopen reading frames: ataP3, ataP5, ataP4, ... orientation(Figs2and 3A) .Ofthese,five(ataP3, ataP5, ataP4, ataP10and ataP7) are highly similar to known or putative genesthat are known or proposed to be implicated in the biosynthesis of the aminonucleoside...
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Báo cáo khóa học: Biochemical and molecular characterization of a laccase from the edible straw mushroom, Volvariella volvacea docx
... that product abundance was evaluated in the exponential phase of the reaction (half of the maximumproduct). To further validate the assays, the optimized cyclenumber (23 and 28 for gpd and lac1, ... (5¢-GGCACTGAGTGACGAAGGCAGGACCATC-3¢), was designedfor the 5¢-RACE reaction to generate the 5¢-cDNA endfragment of lac1 .The5 ¢-cDNA end fragment was clonedinto pGEM T-vector and sequenced as above. ... standard assay mixtures, the velocity of ABTS oxidationwas maximal at 45 °C. The dependence of the rate of ABTSoxidation by lac1 on substrate concentration at pH 3.0 and45 °C followed Michaelis–Menten...
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Báo cáo khoa học: The use of recombinant protein and RNA interference approaches to study the reproductive functions of a gonad-stimulating hormone from the shrimp Metapenaeus ensis ppt
... Tsutsui N, Saido-Sakanaka H, Yang WJ, Jayasankar V,Jasmani S, Okuno A, Ohira T, Okumura T, Aida K &Wilder MN (2004) Molecular characterization of a cDNA encoding vitellogenin in the coonstriped ... dsRNA,DNA corresponding to the mature peptide of MeMIH-Bwas amplified by PCR using T7 promoter-linked primers(forward, 5¢-TAATACGACTCACTATAGGTACTATGTATCGCATGCCAAT-3¢; reverse, 5¢-TAATACGACTCACTATAGGTACTTTAAAGTCCCGGGTTGA-3¢). ... lower panel is the northernblot analysis of MeMIH-B expression in the eyestalk (Es) and tho-racic ganglia during the gonad maturation cycle. Each lane repre-sents an RNA sample from the eyestalk...
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Báo cáo khoa học: Phosphorylation modulates the local conformation and self-aggregation ability of a peptide from the fourth tau microtubule-binding repeat pdf
... Institute of Instrumentation Frontier, National Institute of Advanced Industrial Science and Technology, Ibaraki, JapanPost-translational phosphorylation serves as a controlmechanism in a myriad of ... reveals thatboth tau peptides are capable of self-aggregation and that phosphorylationat Ser356 can modulate this process.AbbreviationsAD, Alzheimer’s disease; PHF, paired helical filament; ... whichpredominantly carries a double negative charge atneutral pH, affects the electrostatic potential andquite often the conformation of the modified protein.Even in the absence of rearrangement, the changein...
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Báo cáo khoa học: Critical roles of Leu99 and Leu115 at the heme distal side in auto-oxidation and the redox potential of a hemeregulated phosphodiesterase from Escherichia coli pptx
... DosH as a templateand using the following respective 5¢-sense primers: 5¢-gatgagtcgggagACCcagctggagaaaaaag-3¢,5¢-gatgagtcgggagTTTcagctggagaaaaaag-3¢,5¢-ggacccgttttgcgACCtcgaaagtgagc-3¢,and ... decreased the rate of auto-oxidation [5],whereas Ala and Asn substitutions at Asp40, anamino-acid residue that interacts via two water mole-cules with the proximal ligand His77, markedlyincreased ... Hirata S, Matsui T, Sasakura Y, Sugiyama S, Yoshim-ura T, Sagami I & Shimizu T (2003) Characterization of Met95 mutants of a heme-regulated phosphodiesterase from Escherichia coli. Optical...
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