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Text mining tutorial pascal
Ngày tải lên :
23/10/2014, 11:47
... AFTER, AGAIN, AGAINST, ALL, ALMOST, ALONE, ALONG, ALREADY, ALSO, Slovenian: A, AH, AHA, ALI, AMPAK, BAJE, BODISI, BOJDA, BRŽKONE, BRŽČAS, BREZ, CELO, DA, DO, Croatian: A, AH, AHA, ALI, AKO, BEZ, ... semantic and abstract information from the surface form of textual data…” Which areas are active in Knowledge Rep & Text Processing? Search & DB Reasoning Computational Linguistics Data Analysis ... Visualizing of big text corpora is easier task because of the big amount of information: statistics already starts working most known approaches are statistics based Visualization of a single (possibly...
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Báo cáo khoa học: "A Study on Automatically Extracted Keywords in Text Categorization" doc
Ngày tải lên :
08/03/2014, 02:21
... Advances in Natural Language Processing (RANLP 2005) Maria Fernanda Caropreso, Stan Matwin, and Fabrizio Sebastiani 2001 A learner-independent evaluation of the usefulness of statistical phrases ... the one and only truth The evaluation measures are precision (how many of the automatically assigned keywords that are also manually assigned keywords) and recall (how many of the manually assigned ... statistical phrases for automated text categorization In Text Databases and Document Management: Theory and Practice, pages 78– 102 Rada Mihalcea and Paul Tarau 2004 TextRank: bringing order into...
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Tài liệu Word Segmentation for Vietnamese Text Categorization: An online corpus approach pptx
Ngày tải lên :
12/12/2013, 11:15
... Vietnamese text categorization until we have a good lexicon and/or a large and trusted training corpus Character-based approaches (syllable-based in Vietnamese case) purely extract certain number ... complete Vietnamese dictionary or a well-balanced, large enough training corpus as we stated above Hybrid approaches try to apply different ways to take their advantages Dinh et al ([6]) have built ... Data (KDD’00) Humanities, Vietnam National University and Mr Tran [14] Chih-Hao Tsai, 2000 MMSEG: A Word Identification System for Doan Thanh, graduate student at Kookmin University for Mandarin...
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An investigation into the effects of brainstorming and giving a text as model on phan dinh phung high school student's attitude and writing ability
Ngày tải lên :
18/12/2013, 10:08
... ideas in a variety of ways 10 Having a range of vocabulary As can be seen from the diagram above, ideas and a range of vocabulary are always demonstrated by writers If writers have poor ideas and ... students at elementary level had writing lesson, they would need the teachers assistance at early stages Using a text as a model has both sides, advantages and disadvantages To begin with its advantages, ... the activities Teachers feed back about classs discussion on choosing ideas, students reading a model and vocabulary and organization Actual writing task analyzing the model Actual writing task...
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Tài liệu Báo cáo khoa học: "Learning with Unlabeled Data for Text Categorization Using Bootstrapping and Feature Projection Techniques" doc
Ngày tải lên :
20/02/2014, 16:20
... a Naive Bayes classifier can be built Since the Naive Bayes classifier can label all unlabeled documents for their category, we can finally obtain labeled training data (machine-labeled data) ... the Naive Bayes classifier using labeled contexts and OurMethod(NB) denotes the Naive Bayes classifier using machine-labeled data as training data The same manner is applied for other classifiers ... set are selected for a validation set We applied a statistical feature selection method (χ2 statistics) to a preprocessing stage for each classifier (Yang and Pedersen, 1997) As performance measures,...
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Tài liệu Báo cáo khoa học: "Fragments and Text Categorization" pptx
Ngày tải lên :
20/02/2014, 16:20
... accuracy increased It is the most important result More details can be found in the next two paragraphs Among the learning algorithms, the highest accuracy was achieved for all the three languages ... PlatsChauds and Pates-Pains-Crepes vs Sauces, among others Results 5.1 General We observed that for both skip-tail and fragments there is always a consistent size of fragments for which the accuracy ... Yang and X Liu 1999 A re-examination of text categorization methods In Proceedings of the 22 annual international ACM SIGIR conference on Research and development in information retrieval, pages...
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An Analysis of Database Workload Performance on Simultaneous Multithreaded Processors potx
Ngày tải lên :
07/03/2014, 14:20
... contains the database code and is shared among all database processes • The Program Global Area (PGA) contains perprocess data, such as private stacks, local variables, and private session variables ... The Shared Global Area (SGA) contains the database buffer cache, the data dictionary (indices and other metadata), the shared SQL area (which allows multiple users to share a single copy of an SQL ... each transaction corresponds to a bank account deposit Each transaction is small, but updates several database tables (e.g., teller and branch) OLTP workloads are intrinsically parallel, and therefore...
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Báo cáo khoa học: "A Comparison and Semi-Quantitative Analysis of Words and Character-Bigrams as Features in Chinese Text Categorization" potx
Ngày tải lên :
08/03/2014, 02:21
... it is significant to make a detailed comparison and analysis here on the relative value of words and bigrams as features in Text Categorization The organization of this paper is as follows: Section ... classifications, F1-measure, precision, recall and accuracy (Baeza-Yates and Ribeiro-Neto, 1999; Sebastiani, 2002) have the same value by microaveraging9, and are labeled with “performance” in the following ... features at high dimensionalities And word features are expected to outperform bigram features at low dimensionalities Semi-Quantitative Analysis In this section, a preliminary statistical analysis...
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Báo cáo khoa học: "A Generalized Vector Space Model for Text Retrieval Based on Semantic Relatedness" pot
Ngày tải lên :
08/03/2014, 21:20
... that semantic information can create an individual space, leading to a dual representation of each document, namely, a vector with document’s terms and another with semantic information Rationally, ... aims at being able to retrieve documents that not necessarily contain exact matches of the query terms, and this is its great advantage This new space leads to a new GVSM model, which is a natural ... we have indexed all the pairwise semantic relatedness values according to the SR measure, in a database, whose size reached 300GB Thus, the execution of the SR itself is really fast, as all pairwise...
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Báo cáo khoa học: "Exploiting Comparable Corpora and Bilingual Dictionaries for Cross-Language Text Categorization" potx
Ngày tải lên :
17/03/2014, 04:20
... corpora In Proceedings of ACL-04, Barcelona, Spain, July A Gliozzo and C Strapparava 2005 Cross language text categorization by acquiring multilingual domain models from comparable corpora In ... represent ambiguity and variability (Gliozzo et al., 2004) and successfully exploited in many NLP applications, such as Word Sense Disambiguation (Strapparava et al., 2004), Text Categorization and ... exploit Latent Semantic Analysis (LSA) (Deerwester et al., 1990) to automatically acquire a MDM from comparable corpora LSA is an unsupervised technique for estimating the similarity among texts and...
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Báo cáo khoa học: "Modeling Topic Dependencies in Hierarchical Text Categorization" pot
Ngày tải lên :
23/03/2014, 14:20
... training set can then be used to train a binary classifier At classification time, pairs are not formed (since the correct candidate is not known); instead, the standard one-versus-all binarization ... References Nir Ailon and Mehryar Mohri 2010 Preference-based learning to rank Machine Learning Maria-Florina Balcan, Nikhil Bansal, Alina Beygelzimer, Don Coppersmith, John Langford, and Gregory ... tree kernels practical for natural language learning In Proccedings of EACL’06 S Riezler and A Vasserman 2010 Incremental feature selection and l1 regularization for relaxed maximumentropy modeling...
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Báo cáo khoa học: "A Framework of Feature Selection Methods for Text Categorization" potx
Ngày tải lên :
30/03/2014, 23:20
... documents as the training data and the remaining 10% as testing data The training data are used for training SVM classifiers, learning parameters in WFO method and selecting "good" features for each ... probability distribution Both the left and right graphs have shadowed areas of the same size And the value of Ai − Bi can be rewritten as the following A − Bi Ai − Bi = i ⋅ Ai = (1 − ) ⋅ Ai Ai Ai ... measurements In the experiment, we consider the case when training data have equal class prior probabilities When training data are unbalanced, we need to change the forms of the two basic measurements...
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Báo cáo khoa học: "A Ranking Model of Proximal and Structural Text Retrieval Based on Region Algebra" ppt
Ngày tải lên :
31/03/2014, 03:20
... oral antibiotics ([mesh] Ê female) ([disease] Ê (anorexia bulimia)) ([disease] Ê complication) 25 year old female with anorexia/bulimia complications and management of anorexia and bulimia ... megakaryocytic leukemia, treatment and prognosis ([disease]Êhypercalcemia) ([neoplastic]Êcarcinoma) (([therapeutic]Êgallium) (galliumQtherapy)) 57 year old male with hypercalcemia secondary to carcinoma ... cancer lung cancer, radiation therapy ([disease]Êpancytopenia) ([neoplastic]Ê(acuteQmegakaryocyticQleukemia)) (treatment prognosis) 70 year old male who presented with pancytopenia acute megakaryocytic...
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Báo cáo khoa học: "Automatic Text Summarization Based on the Global " ppt
Ngày tải lên :
31/03/2014, 04:20
... came r e is an open-class attribute, potentially encompassing all the binary relations lexicalized in natural languages An exhaustive listing of thematic roles and rhetorical relations appears ... beneficiary): Tom visited Mary He brought a present Text Summarization As an example of a basic application of GDA, we have developed an automatic text summarization ... phrase, verb, verb phrase, adnoun or adverb (including preposition and postposition), and adnonfinal or adverbial phrase, respectively The GDA initiative aims at having many W W W authors annotate...
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Báo cáo khoa học: "TEXTUAL EXPERTISE IN WORD EXPERTS: AN APPROACH TO TEXT PARSING BASED ON TOPIC/COMMENT MONITORING" potx
Ngày tải lên :
31/03/2014, 17:20
... tware, pascal-Ccmpi let Pascal Mik=oc~te~ l~oqre~nierspracbe.Pascal PascWaze Pasta Compt Herstel lez pascWare let Pasta Hers ~eller PasCWa re FRA~Z SIL'T F~ SVAL FRAME SVAL F*,, FRA~ SVAL in a ... phenomena if ANNOT - FRAME and an annotation of type FACT exists examine the frame corresponding to FACT if ANNOT - FRAME or ANNOT - WEXP and annotations of type SACT or SVAL exist examine f as frame, ... of variables indicates that they have already been bound, i.e the evaluation of the condition in which a variable occurs takes the value already assigned, otherwise a value assignment is made...
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Image denoising techniques to improve the performance on optical character recognition.
Ngày tải lên :
12/04/2014, 15:39
... V.R.Vijaykumar, P.T.Vanathi, P.Kanagasabapathy Fast and Efficient Algorithm to RemoveGaussian Noise in Digital Images [3] Faisal Shafait Daniel Ke ys ers T homas M Breuel Efficient Implementation of Local ... [5] T Kasar, J Kumar and A G Ramakrishnan Font and Background Color Independent Text Binarization [6] Julinda Gllavata, Ralph Ewerth and Bernd Freisleben FINDING TEXT IN IMAGES VIA LOCAL THRESHOLDING ... noise image is: Xij= Oij+Gij Each of the noise value G is drawn by zeromean Gaussian distribution Many Gaussian noise reduction algorithms demand standard deviation and consider it as a measure...
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đề tài text categorization phân loại văn bản (chương 16)
Ngày tải lên :
27/06/2014, 11:55
... Khoa CNTT, ĐH Bách Khoa TPHCM, Bài Giảng Lý Thuyết Thông Tin [3] Kostas Fragos, Yannis Maistros, Christos Skourlas, A Weighted Maximum Entropy Language Model for Text Classification [4] Kamal ... (∑ (⃗ )) (⃗ )) Sau tính hai xác suất, lớp có xác suất cao lớp cho văn 34 Tài liệu tham khảo [1] Christopher D.Manning, Hinrich Schutze, Foundations of Statistical Natural Language Processing, ... phải phân chia nhiều lớp, để đánh giá tổng thể toàn lớp phân loại, sau lập 10 bảng thống kê cho lớp, hai phương pháp áp dụng để đánh giá micro-averaging macro-averaging 2.6.1 Macro-Averaging Đây...
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8 Ways to Great: Peak Performance on the Job and in Your Life pps
Ngày tải lên :
29/07/2014, 03:20
... a better manager But that would have meant taking away time from doing what he does best—analyzing the market and making smart trading decisions In any case, Darren didn’t really want to be a ... great, and any great trader can become elite In fact, every one of the qualities I mentioned above results from mastering a teachable skill that can be acquired and applied by anyone to virtually ... recognize patterns in the market May lose objectivity and think I see patterns that are not really relevant Highly analytical Able to objectively analyze data and not get distracted by size of trades...
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Báo cáo sinh học: "The effect of improved reproductive performance on genetic gain and inbreeding in MOET breeding schemes for beef cattle" pot
Ngày tải lên :
09/08/2014, 18:22
... (average age of parents when offspring are born) for males and females; and 5) variance of family sizes for male and female parents The latter was calculated as described in Villanueva et al (1994) ... Selection was carried out for 25 years The number of breeding males and females was constant over years and equal to the number of base males and females (9 sires and 18 donors) Animals were genetically ... #i (parameter specific for each donor) was sampled from a normal distribution with mean and variance Q The logarithm of !3i is taken to 1L avoid negative numbers The maximum value of A was set...
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