latent variable models for semantic orientations of phrases

Ngày tải lên: 17/03/2014, 22:20

... improve the results of the interpolated model. For the same reason we allowed a maximum of 30 epochs, for all models, while T ¨ ackstr ¨ om and McDonald (2011) report a maximum of 75 epochs. To ... available, the document variable, y d , should be independent of the input, s , conditioned on the latent variables, y s . This prohibits the model from bypassing the latent variables, which is crucial, since ... se- quences of latent sentence label assignments y s . Due to the introduction of latent variables, the marginal likelihood function is non-concave and thus there are no guarantees of global optimality,...

Ngày tải lên: 20/02/2014, 05:20

... 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 learning in a tight and principled way. We also anticipate that latent variable models will prove effective for learning selectional preferences of semantic...

Ngày tải lên: 07/03/2014, 22:20

Ngày tải lên: 30/03/2014, 23:20

... (2001) proposed a method for ex- tracting semantic orientations of words with boot- strapping. The semantic orientation of a word is determined on the basis of its gloss, if any of their 52 hand-crafted ... Therefore, we calculate values of m with several different values of β and select the value just before the phase transition. 4.4 Discussion on the Model In 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...

Ngày tải lên: 20/02/2014, 15:20

... have used backoff models for combining in-domain and 42 Phrase-Based Backoff Models for Machine Translation of Highly Inflected Languages Mei Yang Department of Electrical Engineering University of Washin ... Section 8 con- cludes. 41 out -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 MT In 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...

Ngày tải lên: 22/02/2014, 02:20

... using graph variables. In GRASPER, 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 our case 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 reasons named above, ... classification of chemical compound names are important aspects of the tasks of BioNLP. This paper introduces the architecture of a system for the syntac- tic and semantic analysis of such names. Our...

Ngày tải lên: 08/03/2014, 01:20

Ngày tải lên: 17/03/2014, 01:20

Ngày tải lên: 23/03/2014, 17:20

Ngày tải lên: 09/08/2014, 18:22

Ngày tải lên: 12/08/2014, 23:22

Ngày tải lên: 14/08/2014, 13:21

Ngày tải lên: 14/08/2014, 13:22

... range of dienophilic compounds is available for DAR inv . In order to obtain reaction times in the range of minutes for the DAR inv , 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 ... 1 H-NMR-Spectrum of 9 in CDCl 3. 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...

Ngày tải lên: 26/10/2012, 09:39

... 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: ( ) ( ) QhDvh t h =∇∇−∇+ ∂ ∂  , (1) Development of system of hydrodynamic-environmental models for...

Ngày tải lên: 13/02/2014, 12:20

... 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...

Ngày tải lên: 20/02/2014, 12:20

... size of the web mixture LM is limited to the size of the baseline in-domain LM. 1 Introduction An automatic speech recognition (ASR) system consists 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 FST sizes are ... (LM). The LM learns the probabilities of word sequences from text corpora available for training. The perfor- mance of the model depends on the amount and style of the text. The more text there is,...

Ngày tải lên: 22/02/2014, 02:20

... home of these sites 6 The six business models for copyright infringement – A data driven study of websites considered to be infringing copyright 35 3 Executive summary The 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...

Ngày tải lên: 06/03/2014, 21:20

... the above formula, nDCG(G i,j ) is the nDCG score of semantic class G i,j ; and k i denotes the number of semantic classes assigned to SSC i . 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 C R (q), where some low- frequency items are removed. Determine the number of topics: Most topic models...

Ngày tải lên: 08/03/2014, 00:20

... 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...

Ngày tải lên: 08/03/2014, 06:20