latent variable models for semantic orientations of phrases
Tài liệu Báo cáo khoa học: "Semi-supervised latent variable models for sentence-level sentiment analysis" pdf
... improve the results of the interpolatedmodel. For the same reason we allowed a maximum of 30 epochs, for all models, while T¨ackstr¨om andMcDonald (2011) report a maximum of 75 epochs.To ... available, the document variable, yd,should be independent of the input,s, conditionedon the latent variables,ys. This prohibits the modelfrom bypassing the latent variables, which is crucial,since ... se-quences of latent sentence label assignments ys.Due to the introduction of latent variables, themarginal likelihood function is non-concave and thusthere are no guarantees of global optimality,...
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Báo cáo khoa học: "Latent variable models of selectional preference" potx
... data. Latent variable models that use E M for infer-ence can be very sensitive to the number of latent variables chosen. For example, the performance of ROOTH-EM worsens quickly if the number of clusters ... on semantic applications of topic models. Section 3 describes the models used in our exper-iments. Section 4 provides details of the experi-mental design. Section 5 presents results for our models ... integration of class induction and task learningin a tight and principled way. We also anticipatethat latent variable models will prove effective for learning selectional preferences of semantic...
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Tài liệu Báo cáo khoa học: "Extracting Semantic Orientations of Words using Spin Model" pdf
... (2001) proposed a method for ex-tracting semantic orientations of words with boot-strapping. The semantic orientation of a word isdetermined on the basis of its gloss, if any of their52 hand-crafted ... Therefore, we calculate values of m with several different values of β and select thevalue just before the phase transition.4.4 Discussion on the ModelIn our model, the semantic orientations of ... extracting semantic orientations with high accuracy, even when only a small number of seed words are available.There are a number of directions for future work.One is the incorporation of syntactic...
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Tài liệu Báo cáo khoa học: "Phrase-Based Backoff Models for Machine Translation of Highly Inflected Languages" docx
... haveused backoff models for combining in-domain and42Phrase-Based Backoff Models for Machine Translation of Highly InflectedLanguagesMei YangDepartment of Electrical EngineeringUniversity of Washin ... Section 8 con-cludes.41out -of- domain data for the purpose of bootstrap-ping a part -of- speech tagger for Chinese, outper-forming standard methods such as EM.4 Backoff Models in MTIn order to ... known and unknown words dif-ferently and propose a backoff model for phrase-based translation.3 Backoff Models Generally speaking, backoff models exploit rela-tionships between more general and...
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Báo cáo khoa học: "A System for Semantic Analysis of Chemical Compound Names" pdf
... using graph variables. InGRASPER, a graph is defined by its set of ver-tices and its set of edges. Therefore, the domain of a graph consists of a set of possible vertices, in ourcase for the atoms, ... problem as a collection of constraints over a collection of variables. Each of the variables has a domain, which is the set of pos-sible values the variable can take. For the reasonsnamed above, ... classification of chemicalcompound names are important aspects of the tasks of BioNLP. This paper introducesthe architecture of a system for the syntac-tic and semantic analysis of such names.Our...
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Báo cáo y học: "The Diels-Alder-Reaction with inverse-Electron-Demand, a very efficient versatile Click-Reaction Concept for proper Ligation of variable molecular Partners"
... range of dienophilic compounds is available for DARinv. In order to obtain reaction times in the range of minutes for the DARinv, the reactivity of the dieno-phile is decisive for the ... Functionalization of tetrazines with temo-zolomide –TMZ Indeed the situation of the synthesis of a further group of dienes used in our TMZ-BioShuttle studies is unequally catchier and the synthesis of functional-ized ... 1H-NMR-Spectrum of 9 in CDCl3. The structure illustrates the shift calculation for protons of the compound with ChemDraw Ultra 2004. (Numbers indicate the predicted shift of the signals in ppm; quality of...
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Tài liệu Báo cáo " Development of system of HydrodynamicEnvironmental models for coastal area (Case study in Quang Ninh - Hai Phong region) " doc
... concentration for the whole water layer. So the system of models should be based on the 3D thermo-hydrodynamical models for each particular environment that contains interested matter. Development of ... need to build a system of models for each environment which is related to each other through the boundary conditions. In this case, we can introduce the system of models for oil slick, oil-in-water ... evaporation of lighter oils and the emulsification, as well as the dissolution of the heavier oils: ( )( )QhDvhth=∇∇−∇+∂∂, (1) Development of system of hydrodynamic-environmental models for...
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Tài liệu Báo cáo khoa học: "Semantic Classification of Noun Phrases Using Web Counts and Learning Algorithms" ppt
... this paper was twofold. Firstly, we wanted to compare the performance of different machine learning algorithms on the task of map-ping from a vector of web frequencies of para- phrases containing ... combination of semantic information from an ontology and statis-tical information about paraphrases could be used together to achieve better performance on this task. Another interesting avenue for ... motivation for this paper is to discover which joining terms are good predictors of a semantic relation, and which learning algorithms perform best at the task of mapping from joining terms to semantic...
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Tài liệu Báo cáo khoa học: "Web augmentation of language models for continuous speech recognition of SMS text messages" docx
... size of the web mixtureLM is limited to the size of the baselinein-domain LM.1 IntroductionAn automatic speech recognition (ASR) systemconsists of acoustic models of speech sounds and of a ... contain the acoustic models, language model and lexicon, but the LM makes up for most of the size. The availability of data varies for the different languages, and therefore the FSTsizes are ... (LM). The LMlearns the probabilities of word sequences fromtext corpora available for training. The perfor-mance of the model depends on the amount andstyle of the text. The more text there is,...
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The six business models for copyright infringement: A data-driven study of websites considered to be infringing copyright docx
... home of these sites6 The six business models for copyright infringement – A data driven study of websites considered to be infringing copyright353Executive summaryThe Six Business Models for ... generally make all forms of content, except live TV, available to download. Downloads allow the user to obtain a full copy of the le which they can then view of ine or copy for each of their various ... independent of the speed of the user’s internet access, enabling the highest quality of experience.Many sites also offer streamed content for the user to consume. This is obviously required for live...
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Báo cáo khoa học: "Employing Topic Models for Pattern-based Semantic Class Discovery" doc
... the above formula, nDCG(Gi,j) is the nDCG score of semantic class Gi,j; and ki denotes the number of semantic classes assigned to SSCi. For a list of queries, the MnDCG score of an algo-rithm ... relationship among terms or phrases by organizing them into semantic classes. For example, {red, white, black…} is a semantic class consisting of color instances. A popular way for semantic class dis-covery ... perform preprocess-ing (refer to Section 3.4 for details) before build-ing topic models for CR(q), where some low-frequency items are removed. Determine the number of topics: Most topic models...
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Báo cáo khoa học: "Semantic Analysis of Japanese Noun Phrases: A New Approach to Dictionary-Based Understanding" doc
... in constructing a semantic- role dictionary for nouns in the special format for machine-use. 3 Interpretation of N1 no N2 using a Dictionary Semantic- role information of nouns in an ordi- ... Hi- taka. 1995. Semantic structure of Japanese noun phrases NP no NP (in Japanese). Transactions of Information Processing Soci- ety of Japan, 36(6):1441-1448. 488 Table 1: Semantic relations ... dictionary for nouns has been constructed so far. However, in many cases, semantic roles of nouns are described in an ordinary dictio- nary for human being. For example, a Japanese dictionary for...
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