Bootstrapping

Bài viết Hiệu ứng ngưỡng chi tiêu công và tăng trưởng kinh tế ở Việt Nam kiểm định bằng phương pháp Bootstrap sau đây khám phá mối quan hệ giữa chi tiêu công và tăng trưởng kinh tế ở Việt Nam bằng ước lượng mô hình ngưỡng với ba đo lường của chi tiêu công so với GDP.

11p maiyeumaiyeu12 01-10-2016 39 5   Download

Nội dung chính của đồ án gồm 3 chương: Chương 1 - Giới thiệu về jQuery, chương 2 - JQuery UI, chương 3 - Bootstrap và chương 4 - JQuery UI Bootstrap và ứng dụng. Mời các bạn tham khảo!

79p thithizone5 12-08-2019 24 5   Download

In this paper, we present an unsupervised framework that bootstraps a complete coreference resolution (CoRe) system from word associations mined from a large unlabeled corpus. We show that word associations are useful for CoRe – e.g., the strong association between Obama and President is an indicator of likely coreference. Association information has so far not been used in CoRe because it is sparse and difficult to learn from small labeled corpora.

10p hongdo_1 12-04-2013 32 2   Download

In bootstrapping (seed set expansion), selecting good seeds and creating stop lists are two effective ways to reduce semantic drift, but these methods generally need human supervision. In this paper, we propose a graphbased approach to helping editors choose effective seeds and stop list instances, applicable to Pantel and Pennacchiotti’s Espresso bootstrapping algorithm. The idea is to select seeds and create a stop list using the rankings of instances and patterns computed by Kleinberg’s HITS algorithm. ...

7p hongdo_1 12-04-2013 46 2   Download

State-of-the-art bootstrapping systems rely on expert-crafted semantic constraints such as negative categories to reduce semantic drift. Unfortunately, their use introduces a substantial amount of supervised knowledge. We present the Relation Guided Bootstrapping (RGB) algorithm, which simultaneously extracts lexicons and open relationships to guide lexicon growth and reduce semantic drift. This removes the necessity for manually crafting category and relationship constraints, and manually generating negative categories. ...

5p hongdo_1 12-04-2013 36 2   Download

We investigate the unsupervised detection of semi-fixed cue phrases such as “This paper proposes a novel approach. . . 1 ” from unseen text, on the basis of only a handful of seed cue phrases with the desired semantics. The problem, in contrast to bootstrapping approaches for Question Answering and Information Extraction, is that it is hard to find a constraining context for occurrences of semi-fixed cue phrases. Our method uses components of the cue phrase itself, rather than external context, to bootstrap. ...

8p hongvang_1 16-04-2013 29 2   Download

This paper presents a new bootstrapping approach to named entity (NE) classification. This approach only requires a few common noun/pronoun seeds that correspond to the concept for the target NE type, e.g. he/she/man/woman for PERSON NE. The entire bootstrapping procedure is implemented as training two successive learners: (i) a decision list is used to learn the parsing-based high precision NE rules; (ii) a Hidden Markov Model is then trained to learn string sequence-based NE patterns.

8p bunbo_1 17-04-2013 27 2   Download

Most event extraction systems are trained with supervised learning and rely on a collection of annotated documents. Due to the domain-specificity of this task, event extraction systems must be retrained with new annotated data for each domain. In this paper, we propose a bootstrapping solution for event role filler extraction that requires minimal human supervision. We aim to rapidly train a state-of-the-art event extraction system using a small set of “seed nouns” for each event role, a collection of relevant (in-domain) and irrelevant (outof-domain) texts, and a semantic dictionary. ...

10p bunthai_1 06-05-2013 30 2   Download

In this paper, we describe a new approach to semi-supervised adaptive learning of event extraction from text. Given a set of examples and an un-annotated text corpus, the BEAR system (Bootstrapping Events And Relations) will automatically learn how to recognize and understand descriptions of complex semantic relationships in text, such as events involving multiple entities and their roles. For example, given a series of descriptions of bombing and shooting incidents (e.g.

10p bunthai_1 06-05-2013 40 2   Download

Luận án nghiên cứu phương pháp chuẩn và các phương pháp nhanh hiện tại cho xây dựng cây bootstrap tiến hóa theo tiêu chuẩn ML, đặc biệt là UFBoot, từ đó đưa ra đề xuất cải tiến để giải quyết tốt hơn từng thách thức của bài toán thời gian chạy, độ chuẩn xác, ảnh hưởng của vi phạm mô hình và hiện tượng đa phân.

122p tamynhan0 04-07-2020 9 2   Download

Bootstrapping a classifier from a small set of seed rules can be viewed as the propagation of labels between examples via features shared between them. This paper introduces a novel variant of the Yarowsky algorithm based on this view. It is a bootstrapping learning method which uses a graph propagation algorithm with a well defined objective function.

9p nghetay_1 07-04-2013 30 1   Download

We address two problems in the field of automatic optimization of dialogue strategies: learning effective dialogue strategies when no initial data or system exists, and evaluating the result with real users. We use Reinforcement Learning (RL) to learn multimodal dialogue strategies by interaction with a simulated environment which is “bootstrapped” from small amounts of Wizard-of-Oz (WOZ) data.

9p hongphan_1 15-04-2013 33 1   Download

We present an approach to pronoun resolution based on syntactic paths. Through a simple bootstrapping procedure, we learn the likelihood of coreference between a pronoun and a candidate noun based on the path in the parse tree between the two entities. This path information enables us to handle previously challenging resolution instances, and also robustly addresses traditional syntactic coreference constraints. Highly coreferent paths also allow mining of precise probabilistic gender/number information. ...

8p hongvang_1 16-04-2013 33 1   Download

We introduce a simple method to pack words for statistical word alignment. Our goal is to simplify the task of automatic word alignment by packing several consecutive words together when we believe they correspond to a single word in the opposite language. This is done using the word aligner itself, i.e. by bootstrapping on its output. We evaluate the performance of our approach on a Chinese-to-English machine translation task, and report a 12.2% relative increase in BLEU score over a state-of-the art phrasebased SMT system. ...

8p hongvang_1 16-04-2013 27 1   Download

We propose a bootstrapping approach to training a memoriless stochastic transducer for the task of extracting transliterations from an English-Arabic bitext. The transducer learns its similarity metric from the data in the bitext, and thus can function directly on strings written in different writing scripts without any additional language knowledge. We show that this bootstrapped transducer performs as well or better than a model designed specifically to detect Arabic-English transliterations. ...

8p hongvang_1 16-04-2013 30 1   Download

A wide range of supervised learning algorithms has been applied to Text Categorization. However, the supervised learning approaches have some problems. One of them is that they require a large, often prohibitive, number of labeled training documents for accurate learning. Generally, acquiring class labels for training data is costly, while gathering a large quantity of unlabeled data is cheap. We here propose a new automatic text categorization method for learning from only unlabeled data using a bootstrapping framework and a feature projection technique.

8p bunbo_1 17-04-2013 43 1   Download

This paper proposes the use of uncertainty reduction in machine learning methods such as co-training and bilingual bootstrapping, which are referred to, in a general term, as ‘collaborative bootstrapping’. The paper indicates that uncertainty reduction is an important factor for enhancing the performance of collaborative bootstrapping.

8p bunbo_1 17-04-2013 46 1   Download

This paper proposes a new method for word translation disambiguation using a machine learning technique called ‘Bilingual Bootstrapping’. Bilingual Bootstrapping makes use of in learning a small number of classified data and a large number of unclassified data in the source and the target languages in translation. It constructs classifiers in the two languages in parallel and repeatedly boosts the performances of the classifiers by further classifying data in each of the two languages and by exchanging between the two languages information regarding the classified data. ...

9p bunmoc_1 20-04-2013 38 1   Download

We present a practical co-training method for bootstrapping statistical parsers using a small amount of manually parsed training material and a much larger pool of raw sentences. Experimental results show that unlabelled sentences can be used to improve the performance of statistical parsers. In addition, we consider the problem of bootstrapping parsers when the manually parsed training material is in a different domain to either the raw sentences or the testing material.

8p bunthai_1 06-05-2013 34 1   Download

Trong bài báo này, chúng tôi sử dụng phương pháp bootstrap để nghiên cứu độ lệch tiêu chuẩn của mật độ xương tối đa của phụ nữ Việt Nam. Kết quả này có tầm quan trọng trong việc nhận biết mức độ nguy hiểm của căn bệnh loãng xương.

8p loki1234 24-05-2018 22 0   Download