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Seismic data denoising based on learning-type overcomplete dictionaries 被引量:19
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作者 唐刚 马坚伟 杨慧珠 《Applied Geophysics》 SCIE CSCD 2012年第1期27-32,114,115,共8页
The transform base function method is one of the most commonly used techniques for seismic denoising, which achieves the purpose of removing noise by utilizing the sparseness and separateness of seismic data in the tr... The transform base function method is one of the most commonly used techniques for seismic denoising, which achieves the purpose of removing noise by utilizing the sparseness and separateness of seismic data in the transform base function domain. However, the effect is not satisfactory because it needs to pre-select a set of fixed transform-base functions and process the corresponding transform. In order to find a new approach, we introduce learning-type overcomplete dictionaries, i.e., optimally sparse data representation is achieved through learning and training driven by seismic modeling data, instead of using a single set of fixed transform bases. In this paper, we combine dictionary learning with total variation (TV) minimization to suppress pseudo-Gibbs artifacts and describe the effects of non-uniform dictionary sub-block scale on removing noises. Taking the discrete cosine transform and random noise as an example, we made comparisons between a single transform base, non-learning-type, overcomplete dictionary and a learning-type overcomplete dictionary and also compare the results with uniform and nonuniform size dictionary atoms. The results show that, when seismic data is represented sparsely using the learning-type overcomplete dictionary, noise is also removed and visibility and signal to noise ratio is markedly increased. We also compare the results with uniform and nonuniform size dictionary atoms, which demonstrate that a nonuniform dictionary atom is more suitable for seismic denoising. 展开更多
关键词 learning-type overcomplete dictionary seismic denoising discrete cosine transform DATA-DRIVEN
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An application of matching pursuit time-frequency decomposition method using multi-wavelet dictionaries 被引量:2
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作者 Zhao Tianzi Song Wei 《Petroleum Science》 SCIE CAS CSCD 2012年第3期310-316,共7页
In the time-frequency analysis of seismic signals, the matching pursuit algorithm is an effective tool for non-stationary signals, and has high time-frequency resolution and a transient structure with local self-adapt... In the time-frequency analysis of seismic signals, the matching pursuit algorithm is an effective tool for non-stationary signals, and has high time-frequency resolution and a transient structure with local self-adaption. We expand the time-frequency dictionary library with Ricker, Morlet, and mixed phase seismic wavelets, to make the method more suitable for seismic signal time-frequency decomposition. In this paper, we demonstrated the algorithm theory using synthetic seismic data, and tested the method using synthetic data with 25% noise. We compared the matching pursuit results of the time-frequency dictionaries. The results indicated that the dictionary which matched the signal characteristics better would obtain better results, and can reflect the information of seismic data effectively. 展开更多
关键词 Matching pursuit seismic attenuation wavelet transform Wigner Ville distribution time- frequency dictionary
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Single image super-resolution reconstruction using multiple dictionaries and improved iterative back-projection 被引量:3
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作者 ZHAO Jian-wen YUAN Qi-ping +2 位作者 QIN Juan YANG Xiao-ping CHEN Zhi-hong 《Optoelectronics Letters》 EI 2019年第2期156-160,共5页
In order to improve the super-resolution reconstruction effect of the single image, a novel multiple dictionaries learning via support vector regression(SVR) and improved iterative back-projection(IBP) are proposed.To... In order to improve the super-resolution reconstruction effect of the single image, a novel multiple dictionaries learning via support vector regression(SVR) and improved iterative back-projection(IBP) are proposed.To characterize the image structure, the low-frequency dictionary is constructed from the normalized brightness of low-frequency image patches in a discrete-cosine-transform(DCT) domain.Pixels determined by Gaussian weighting are added to the input vector to restore more high-frequency information when training the high-frequency image patch dictionary in the space domain.During post-processing, the improved IBP is employed to reduce regression errors each time.Experiment results show that the peak signal-to-noise ratio(PSNR)and structural similarity(SSIM) of the proposed method are enhanced by 1.6%—5.5% and 1.5%—13.1% compared with those of bicubic interpolation, and the proposed method visually outperforms several algorithms. 展开更多
关键词 SUPER-RESOLUTION MULTIPLE dictionaries
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On Translators and Dictionaries
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作者 胡加强 《Sino-US English Teaching》 2006年第8期69-72,77,共5页
This paper demonstrates the relationship between translators and dictionaries, and the proper approaches to using dictionaries. Dictionaries play an indispensable role in translation through providing definitions and ... This paper demonstrates the relationship between translators and dictionaries, and the proper approaches to using dictionaries. Dictionaries play an indispensable role in translation through providing definitions and showing various translation skills. However, translators should handle properly the dictionary definition for each word, and interpret within context with consideration of its target readers and the possible effect the translation will possibly have on them. 展开更多
关键词 DICTIONARY TRANSLATOR CONTEXT
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Analyzing verbs' definitions in learner's dictionaries based on the schema theory 被引量:1
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作者 YU Ping-fang XU Jing DU Jia-li 《Sino-US English Teaching》 2009年第5期6-10,共5页
The synthetic defining style, a predominant way used to define verbs in many dictionaries, is the main factor that makes dictionary definitions vague and incomplete. The present paper argues that instead of the synthe... The synthetic defining style, a predominant way used to define verbs in many dictionaries, is the main factor that makes dictionary definitions vague and incomplete. The present paper argues that instead of the synthetic defining mode, an analytical meaning-explaining way should be used in dictionaries designed for SLA learners. The analytical meanings of verbs are viewed as mini-narratives and form event schemata comprised of three sub-schemata, namely, participant schema, action schema and scenario schema. The three sub-schemata should be clearly fore-grounded in verbs' definitions in learners' dictionaries. 展开更多
关键词 VERB definition schema NARRATIVE learners' dictionary
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Comparison and Contrast of Paper-based and On-line Dictionaries
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作者 王雪 《海外英语》 2014年第6X期244-245,共2页
This paper explores the advantages and disadvantages of paper printed and on-line dictionaries in terms of macrostructure and microstructure,availability,portability and practicality etc.Different kinds of dictionarie... This paper explores the advantages and disadvantages of paper printed and on-line dictionaries in terms of macrostructure and microstructure,availability,portability and practicality etc.Different kinds of dictionaries have unique features that cannot be fully replaced by other kinds. 展开更多
关键词 dictionaries MACROSTRUCTURE MICROSTRUCTURE advanta
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Low-Rank Sparse Representation with Pre-Learned Dictionaries and Side Information for Singing Voice Separation
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作者 Chenghong Yang Hongjuan Zhang 《Advances in Pure Mathematics》 2018年第4期419-427,共9页
At present, although the human speech separation has achieved fruitful results, it is not ideal for the separation of singing and accompaniment. Based on low-rank and sparse optimization theory, in this paper, we prop... At present, although the human speech separation has achieved fruitful results, it is not ideal for the separation of singing and accompaniment. Based on low-rank and sparse optimization theory, in this paper, we propose a new singing voice separation algorithm called Low-rank, Sparse Representation with pre-learned dictionaries and side Information (LSRi). The algorithm incorporates both the vocal and instrumental spectrograms as sparse matrix and low-rank matrix, meanwhile combines pre-learning dictionary and the reconstructed voice spectrogram form the annotation. Evaluations on the iKala dataset show that the proposed methods are effective and efficient for singing voice separation. 展开更多
关键词 SINGING VOICE SEPARATION Low-Rank and Sparse DICTIONARY Learning
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For Foreign-Oriented Chinese Literature Translation,What Inspirations Can Be Derived from the Carrying out of the Translation Project of the King James Version of The Bible?
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作者 ZHANG Xi-zhi 《Journal of Literature and Art Studies》 2018年第7期1015-1022,共8页
Inspired by the“One Belt,One Road”initiative and the“Going Global”strategy,China has become more deeply involved in foreign exchange.The introduction of Chinese literature to the outside world has been part of Ch... Inspired by the“One Belt,One Road”initiative and the“Going Global”strategy,China has become more deeply involved in foreign exchange.The introduction of Chinese literature to the outside world has been part of China’s soft-power strategy.However,it must be acknowledged that the quality of Chinese literature translation is not satisfactory for several reasons:essentially,issues relating to project management,translators’qualifications,and translation quality control.This essay reviews the translation practice that gave rise to the King James Bible(KJB),with a focus on its project management,translators’qualifications and quality control.It is hoped that this will serve to enlighten professionals in the field of Chinese literature translation. 展开更多
关键词 KJB TRANSLATION foreign-oriented LITERATURE TRANSLATION Chinese LITERATURE
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On Lexicographical Translation in Bilingual Dictionaries and its Multi-disciplinary Theoretical Basis
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作者 Wei Xiangqing 《宏观语言学》 2007年第1期171-179,共9页
Traditionally, in the field of bilingual lexicography, the main task for lexicographers is to provide lexical equivalents in bilingual dictionaries by all possible means. And accordingly, how to provide appropriate or... Traditionally, in the field of bilingual lexicography, the main task for lexicographers is to provide lexical equivalents in bilingual dictionaries by all possible means. And accordingly, how to provide appropriate or satisfying translation equivalents in bilingual dictionaries is always the centre of attention in bilingual metalexicography. However, the history of bilingual lexicography shows that it has never been an easy task, because of linguistic and cultural anisomorphism. The usual compromise made by most lexicographers is to introduce partial or explanatory equivalents. This recourse means that most bilingual lexicographers, unfortunately, more than often, fail to meet the needs of foreign language learners. Certain misconceptions about the translation equivalents emerge among the language learners, which explains the awkward situation that besets bilingual exicographers. The present contribution aims at perceiving lexicographical translation as a dynamic process by which an adequate semantic system in the target language would be set up to serve as a functionally equivalent defining system. By doing this, bilingual lexicographers should establish a powerful target language semantic network, in which lexicographical sections like verbal illustrations, usage notes and etymologies, etc. would be considered together with the translation equivalents as an integrated whole. This is an attempt to describe the essential features of lexicographical translation and its multi-disciplinary theoretical basis, in the hope that future practice in bilingual lexicography might be improved. 展开更多
关键词 BILINGUAL dictionaries lexicographical TRANSLATION MULTI-DISCIPLINARY THEORETICAL BASIS
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Foreign-oriented Hengshui Carries out Opening Policy
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作者 Zhai Jichang,Mayor of Hengshui City,Hebei Province 《China's Foreign Trade》 1995年第9期35-35,共1页
Since ushering in the 1990s, Hengshui City has been taking advantage of its excellent geographical position to develop its foreign-oriented economy, with good results. Take last year for example, the city signed contr... Since ushering in the 1990s, Hengshui City has been taking advantage of its excellent geographical position to develop its foreign-oriented economy, with good results. Take last year for example, the city signed contracts for altogether 28 foreign-invested projects, with a total capital of US$19.37 million and contractual capital of US$ 5.73 million, 14 completed and constructing foreign-invested projects, of which six have been put into operation. The infrastructure is being further improved in the Hi-tech Industrial Park which includes 49 projects of a total investment of RMB 180 million. The Hengshui Lake Economic and Technology 展开更多
关键词 foreign-oriented Hengshui Carries out Opening Policy LAKE US
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Application of a Web Search Engine in Translating Business Terms in English-Chinese Dictionaries
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作者 HE Jianing ZHOU Zhiyi +2 位作者 XU Rong WU Minghui XIE Zijun 《Sino-US English Teaching》 2018年第9期454-458,共5页
Web search engines are important tools for lexicography.This paper takes translation of business terms("e-commerce"and"e-business")as an example to illustrate the application of web search engines ... Web search engines are important tools for lexicography.This paper takes translation of business terms("e-commerce"and"e-business")as an example to illustrate the application of web search engines in English-Chinese dictionary translation,including the methods of(1)finding the potential Chinese equivalents of the English business terms,and(2)selecting typical and proper Chinese equivalents in accordance with the frequencies and the meanings of the English business terms respectively. 展开更多
关键词 web search engine BUSINESS TERM ENGLISH-CHINESE DICTIONARY translation
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A Foreign-Oriented Economic Entity——Wenzhou Economic and Technical Development Corporation
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作者 Chen Xinjiang 《China's Foreign Trade》 1994年第10期17-17,共1页
Located at 30 Lucheng Road, Wenzhou, the Wenzhou Economic and Technical Development Corporation(WETDC) was founded in September 1985. It was granted of self-operational rights for imports and exports by the former Min... Located at 30 Lucheng Road, Wenzhou, the Wenzhou Economic and Technical Development Corporation(WETDC) was founded in September 1985. It was granted of self-operational rights for imports and exports by the former Ministry of Foreign Economic Relations and Trade in November 1992. The corporation is a special composite foreign trade company, integrating 展开更多
关键词 US over A foreign-oriented Economic Entity Wenzhou Economic and Technical Development Corporation
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Presenting Knowledge System of International Trade Terms in Business English Learners' Dictionaries
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作者 HE Jia-ning KHOU Zhi-yi +2 位作者 XIE Zi-jun WU Ming-hui XU Rong 《Journal of Literature and Art Studies》 2018年第8期1275-1281,共7页
Dictionaries should present business encyclopedic knowledge as well as business linguistic knowledge. This paper, taking Incoterms for international trade as an example (with "CIF" as the case for analysis), intro... Dictionaries should present business encyclopedic knowledge as well as business linguistic knowledge. This paper, taking Incoterms for international trade as an example (with "CIF" as the case for analysis), introduces 7 types of dictionary structures (overall structure, frame stzucture/megastrncture, macrostructure, microstzucture, distribution structure, cross-reference stzucture/mediostrncture and access structure), summarizes the knowledge system of international trade terms (consisting of "international trade", "sets of rules of international trade terms", "Incoterms 2010", and "CIF"), and illustrates the methods of systematically presenting the knowledge system of international trade terms through dictionary structures in an English-English-Chinese bilingualized business English learners' dictionary with Oxford Business English Dictionary for Learners of English (New Edition) as a reference. Such presentation is intended for enhancing business English learners as dictionary users to grasp the knowledge of international trade terms as a whole. 展开更多
关键词 business English learners' dictionary (BELD) dictionary structure terminological knowledge system international trade term knowledge presentation business English
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Scaffolding Information of Learner’s Dictionaries for L2 Writing: A User Perspective
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作者 YANG Na LI Yan ZHENG Jie 《Sino-US English Teaching》 2021年第3期51-59,共9页
As a major resource and tool of language learning, learner’s dictionaries have provided sufficient information forL2 writing, which serves as a good guide of peer feedback. Hence, learner’s dictionaries are an indis... As a major resource and tool of language learning, learner’s dictionaries have provided sufficient information forL2 writing, which serves as a good guide of peer feedback. Hence, learner’s dictionaries are an indispensable partof scaffolding in the L2 writing feedback system. However, the effects of dictionary use in L2 writing have longbeen ignored either in L2 writing pedagogy or in learner lexicography. By applying the concept of “scaffolding” topeer feedback as the theoretical framework, this study first clarifies three distinct types of scaffolding informationpresented in current English learner’s dictionaries, and then makes an investigation into EFL learners’ perceptionand practical use of scaffolding information in their English writing. Results show that most EFL learners havepositive attitudes towards scaffolding information and its role in motivating effective feedback in English writing.But their practical use of such information is not satisfactory owing to their inadequate skills and knowledge ofdictionary use. This reflects a high demand of a dictionary use course in universities, which will help to raise EFLlearners’ dictionary use efficiency as well as improve English teachers’ lexicographical expertise in English writingpedagogy. 展开更多
关键词 scaffolding information learner’s dictionaries peer feedback
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A Study on the Compilation of Dictionaries for Teaching Chinese as a Foreign Language Based on the Second Language Acquisition Theory
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作者 黄毓芸 《海外英语》 2016年第5期178-180,共3页
This article intends to demonstrate the principles for dictionary compilation.To summarize,general rules are to be followed.At the same time,this article probes into the differences of Chinese to Chinese dictionary,Ch... This article intends to demonstrate the principles for dictionary compilation.To summarize,general rules are to be followed.At the same time,this article probes into the differences of Chinese to Chinese dictionary,Chinese to foreign language dictionary,dictionaries for the preparation of certain exams,learner’s dictionaries for reviewing errors,dictionaries with multimedia and dictionaries built via the Internet..In all,one of the key factors for dictionary compilation is the professionalism of editors and writers.The training of the people involved is vital,which would contribute to setting up a better order of the market.Acknowledgements should also be given to achievements in dictionary compilation.Revisions and polishing are required to improve the dictionaries on the market that have already won the acclaim so as to put their influence to the best display. 展开更多
关键词 SECOND LANGUAGE ACQUISITION COMPILATION of dictionaries TEACHING Chinese as a FOREIGN LANGUAGE
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A Polish College Students' Use of Dictionaries in Text Production
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作者 Dorota Osuchowska 《Sino-US English Teaching》 2014年第10期726-732,共7页
The study, conducted in the academic year 2008, explores the potential differences in the use of a dictionary in support of a standard writing task by two student groups at two different proficiency levels. Fifty seve... The study, conducted in the academic year 2008, explores the potential differences in the use of a dictionary in support of a standard writing task by two student groups at two different proficiency levels. Fifty seven students working on a real classroom assignment were observed; in order to make sure that the subjects behaved as they normally would, they had not been informed that their dictionary behavior was to be observed. The study which shows that the need for a dictionary is smaller in the case of more advanced students may be of interest to those foreign language teachers who fear that giving a student an unlimited access to a dictionary may hamper the development of his expressive abilities. In turn, a marked preference on the part of more advanced students for an L I-L2, paralleled by a sustained interest in information categories typically placed in foreign learner's dictionaries suggests that advanced language learners writing in English would probably opt for a lexicographic product combining the best of both dictionary types: an LI-L2 and an MLD. 展开更多
关键词 dictionary use text production teaching English as a foreign language
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A Rapid-growing Foreign-oriented Economy in Rugao
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作者 Qian Changlai Yang Fei 《China's Foreign Trade》 1995年第11期22-22,共1页
Rugao in Jiangsu Province has sped up its development of foreignfunded enterprises by taking advantage of the ancient city, the Yangtze River and the East Sea, through domestic unity and the introduction of foreign ca... Rugao in Jiangsu Province has sped up its development of foreignfunded enterprises by taking advantage of the ancient city, the Yangtze River and the East Sea, through domestic unity and the introduction of foreign capital, with an open economy as the starting point, and foreign cooperation promoting 展开更多
关键词 A Rapid-growing foreign-oriented Economy in Rugao
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