186,821 research outputs found

    A new semantic attribute deep learning with a linguistic attribute hierarchy for spam detection

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    The massive increase of spam is posing a very serious threat to email and SMS, which have become an important means of communication. Not only do spams annoy users, but they also become a security threat. Machine learning techniques have been widely used for spam detection. In this paper, we propose another form of deep learning, a linguistic attribute hierarchy, embedded with linguistic decision trees, for spam detection, and examine the effect of semantic attributes on the spam detection, represented by the linguistic attribute hierarchy. A case study on the SMS message database from the UCI machine learning repository has shown that a linguistic attribute hierarchy embedded with linguistic decision trees provides a transparent approach to in-depth analysing attribute impact on spam detection. This approach can not only efficiently tackle ‘curse of dimensionality’ in spam detection with massive attributes, but also improve the performance of spam detection when the semantic attributes are constructed to a proper hierarchy

    Multi-Dimensional Inheritance

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    In this paper, we present an alternative approach to multiple inheritance for typed feature structures. In our approach, a feature structure can be associated with several types coming from different hierarchies (dimensions). In case of multiple inheritance, a type has supertypes from different hierarchies. We contrast this approach with approaches based on a single type hierarchy where a feature structure has only one unique most general type, and multiple inheritance involves computation of greatest lower bounds in the hierarchy. The proposed approach supports current linguistic analyses in constraint-based formalisms like HPSG, inheritance in the lexicon, and knowledge representation for NLP systems. Finally, we show that multi-dimensional inheritance hierarchies can be compiled into a Prolog term representation, which allows to compute the conjunction of two types efficiently by Prolog term unification.Comment: 9 pages, styles: a4,figfont,eepic,eps

    Sprachliche Oppositionen und Hierarchien zur Beschreibung der Weltordnung in Corpus Areopagiticum

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    Hierarchy and opposition are two fundamental principles of the theology and cosmology of a philosopher known as a descriptor or a magister hierarchiarum in the history of theological science, namely (Pseudo-) Dionysius the Areopagite. Hierarchy and opposition are universal structural relationships between components of a system, including a natural language; they are the most important relationships within linguistic units of a language system: hierarchy represents the principle of the existence of units at different levels, while opposition describes how units at the same level exist. Linguistic oppositions, which should reflect the apparent contradictions of the universe by revealing the truth in the compilation of the members of these opposites, include mainly those of grammatical categories (gender, number, tense forms, subject/predicate opposition). Hierarchy can be used as a kind of vertical opposition; its members do not stand in opposition to each other but are in a relationship of subordination. Among language hierarchies, the following are mentioned: lexical hyperonymes, and the relationship between the derivative and the base word in word-formation, and the system of comparison in the morphology of the adjective. Finally, the structure of the text is taken as a hierarchy at a higher level. Hierarchy and opposition in internal language relations are used by Dionysius the Areopagite to form and underline the idea of the hierarchical structure of the universe. Linguistic hierarchies and oppositions in his works are closely linked to logical ones. These systemic relations are in his discourses, transformed in sort to level their differences: each opposition has a shadow of hierarchy and each hierarchy necessarily contains an opposition

    Rhythm Class Perception by Expert Phoneticians

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    This paper contributes to the recent debate in linguistic-phonetic rhythm research dominated by the idea of a perceptual dichotomy involving “syllable-timed” and “stress-timed” rhythm classes. Some previous studies have shown that it is difficult both to find reliable acoustic correlates of these classes and also to obtain reliable perceptual data for their support. In an experiment, we asked 12 British English phoneticians to classify the rhythm class of 36 samples spoken by 24 talkers in six dialects of British English. Expert listeners’ perception was shown to be guided by two factors: (1) the assumed rhythm class affiliation of a particular dialect and (2) one acoustic cue related to the prosodic hierarchy, namely the degree of accentual lengthening. We argue that the rhythm class hypothesis has reached its limits in informing empirical enquiry into linguistic rhythm, and new research avenues are needed to understand this multi-layered phenomenon

    Meaningfulness, the unsaid and translatability. Instead of an introduction

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    The present paper opens this topical issue on translation techniques by drawing a theoretical basis for the discussion of translational issues in a linguistic perspective. In order to forward an audience- oriented definition of translation, I will describe different forms of linguistic variability, highlighting how they present different difficulties to translators, with an emphasis on the semantic and communicative complexity that a source text can exhibit. The problem is then further discussed through a comparison between Quine's radically holistic position and the translatability principle supported by such semanticists as Katz. General translatability — at the expense of additional complexity — is eventually proposed as a possible synthesis of this debate. In describing the meaningfulness levels of source texts through Hjelmslevian semiotics, and his semiotic hierarchy in particular, the paper attempts to go beyond denotative semiotic, and reframe some translational issues in a connotative semiotic and metasemiotic perspective

    Interval Consistency Repairing Method for Double Hierarchy Hesitant Fuzzy Linguistic Preference Relation and Application in the Diagnosis of Lung Cancer

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    Natural language is more in line with the real thoughts of people than crisp numbers considering that qualitative language information is more consistent with the expression habits of experts. Double hierarchy hesitant fuzzy linguistic preference relation (DHHFLPR) can be used to express complex linguistic preference information accurately because the pairwise comparison methods are more accurate than non-pairwise methods. Consistency reflects the rationalization of a preference relation and can be used to judge whether a preference relation is self-contradictory or not. In this paper, an interval consistency index of DHHFLPR is developed, which is consisted by the consistency indices of all double hierarchy linguistic preference relations associated with the DHHFLPR. Additionally, an average consistency index of DHHFLPR is given by calculating the average value of the consistency indices of all double hierarchy linguistic preference relations. Moreover, we develop a consistency checking and repairing method for DHHFLPR. Finally, we apply the proposed method into a practical group decision-making problem that is to identify the most critical factors in developing lung cancer, and some comparative analyses involving the connections and differences among the proposed consistency indices are analysed

    AN INCLINATION TOWARDS ACCUSATIVE

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    This paper argues that linguistic hierarchies are not real in any linguistic sense but are summaries of linguistic observation or typology. Position in any hierarchy is based on intrinsic properties, specjically complexity of linguistic substance. To illustrate, an example involving a change in degree of ergativity across dialects of Inuktitut is discussed. A hierarchy account would only record changes in the use of case, but would not be able to probe the subtle changes in case structure which are suggested by the facts. Under this view, case is not a position on a hierarchy but a syntactic construct, where different cases may have differing complexities (Bejar and Hall 1999). [n particular, accusative case has only a little k (or functional case), and cannot license an NP on its own, i.e., is structural. In contrast, a structure with a little k and a minimum lexical complement can license an NP, i.e., is oblique. The subtle interplay between accusative, partitive and instrumental case in different dialects is examined. It is argued that the Inuktitut case marker MIK originates as an oblique case in western dialects, but has undergone grammaticalization in eastern dialects. Grammaticalization is seen here to be structure reduction
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