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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Designing for adaptability in architecture

Schmidt, Robert January 2014 (has links)
The research is framed on the premise that designing buildings that can adapt by accommodating change easier and more cost-effectively provides an effective means to a desired end a more sustainable built environment. In this context, adaptability can be viewed as a means to decrease the amount of new construction (reduce), (re)activate underused or vacant building stock (reuse) and enhance disassembly/ deconstruction of components (reuse, recycle) - prolonging the useful life of buildings (reduce, reuse, recycle). The aim of the research is to gain a holistic overview of the concept of adaptability in the construction industry and provide an improved framework to design for, deploy and implement adaptability. An over-arching research question was posited to guide the inquiry: how can architects understand, communicate, design for and test the concept of adaptability in the context of the design process? The research followed Dubois and Gadde s (2002) systematic combining as an over-arching approach that continuously moves between the empirical world and theoretical models allowing the co-evolution of data collection and theory from the beginning as part of a non-linear process with the objective of matching theory with reality. An initial framework was abducted from a preliminary collection of data from which a set of mixed research methods was deployed to explore adaptability (interviews, building case studies, dependency structural matrices, practitioner surveys and workshop). Emergent from the data is an expanded and revised theory on designing for adaptability consisting of concepts, models and propositions. The models illustrate many of the casual links between the physical design structure of the building (e.g. plan depth, storey height) and the soft contingencies of a messy design/construction/occupation process (e.g. procurement route, funding methods, stakeholder mindsets). In an effort to enhance building adaptability, the abducted propositions suggest a shift in the way the industry values buildings and conducts aspects of the design process and how designer s approach designing for adaptability.
2

Tree Transformations in Inductive Dependency Parsing

Nilsson, Jens January 2007 (has links)
<p>This licentiate thesis deals with automatic syntactic analysis, or parsing, of natural languages. A parser constructs the syntactic analysis, which it learns by looking at correctly analyzed sentences, known as training data. The general topic concerns manipulations of the training data in order to improve the parsing accuracy.</p><p>Several studies using constituency-based theories for natural languages in such automatic and data-driven syntactic parsing have shown that training data, annotated according to a linguistic theory, often needs to be adapted in various ways in order to achieve an adequate, automatic analysis. A linguistically sound constituent structure is not necessarily well-suited for learning and parsing using existing data-driven methods. Modifications to the constituency-based trees in the training data, and corresponding modifications to the parser output, have successfully been applied to increase the parser accuracy. The topic of this thesis is to investigate whether similar modifications in the form of tree transformations to training data, annotated with dependency-based structures, can improve accuracy for data-driven dependency parsers. In order to do this, two types of tree transformations are in focus in this thesis.</p><p>%This is a topic that so far has been less studied.</p><p>The first one concerns non-projectivity. The full potential of dependency parsing can only be realized if non-projective constructions are allowed, which pose a problem for projective dependency parsers. On the other hand, non-projective parsers tend, among other things, to be slower. In order to maintain the benefits of projective parsing, a tree transformation technique to recover non-projectivity while using a projective parser is presented here.</p><p>The second type of transformation concerns linguistic phenomena that are possible but hard for a parser to learn, given a certain choice of dependency analysis. This study has concentrated on two such phenomena, coordination and verb groups, for which tree transformations are applied in order to improve parsing accuracy, in case the original structure does not coincide with a structure that is easy to learn.</p><p>Empirical evaluations are performed using treebank data from various languages, and using more than one dependency parser. The results show that the benefit of these tree transformations used in preprocessing and postprocessing to a large extent is language, treebank and parser independent.</p>
3

Tree Transformations in Inductive Dependency Parsing

Nilsson, Jens January 2007 (has links)
<p>This licentiate thesis deals with automatic syntactic analysis, or parsing, of natural languages. A parser constructs the syntactic analysis, which it learns by looking at correctly analyzed sentences, known as training data. The general topic concerns manipulations of the training data in order to improve the parsing accuracy.</p><p>Several studies using constituency-based theories for natural languages in such automatic and data-driven syntactic parsing have shown that training data, annotated according to a linguistic theory, often needs to be adapted in various ways in order to achieve an adequate, automatic analysis. A linguistically sound constituent structure is not necessarily well-suited for learning and parsing using existing data-driven methods. Modifications to the constituency-based trees in the training data, and corresponding modifications to the parser output, have successfully been applied to increase the parser accuracy. The topic of this thesis is to investigate whether similar modifications in the form of tree transformations to training data, annotated with dependency-based structures, can improve accuracy for data-driven dependency parsers. In order to do this, two types of tree transformations are in focus in this thesis.</p><p>The first one concerns non-projectivity. The full potential of dependency parsing can only be realized if non-projective constructions are allowed, which pose a problem for projective dependency parsers. On the other hand, non-projective parsers tend, among other things, to be slower. In order to maintain the benefits of projective parsing, a tree transformation technique to recover non-projectivity while using a projective parser is presented here.</p><p>The second type of transformation concerns linguistic phenomena that are possible but hard for a parser to learn, given a certain choice of dependency analysis. This study has concentrated on two such phenomena, coordination and verb groups, for which tree transformations are applied in order to improve parsing accuracy, in case the original structure does not coincide with a structure that is easy to learn.</p><p>Empirical evaluations are performed using treebank data from various languages, and using more than one dependency parser. The results show that the benefit of these tree transformations used in preprocessing and postprocessing to a large extent is language, treebank and parser independent.</p>
4

Transition-Based Natural Language Parsing with Dependency and Constituency Representations

Hall, Johan January 2008 (has links)
Denna doktorsavhandling undersöker olika aspekter av automatisk syntaktisk analys av texter på naturligt språk. En parser eller syntaktisk analysator, som vi definierar den i denna avhandling, har till uppgift att skapa en syntaktisk analys för varje mening i en text på naturligt språk. Vår metod är datadriven, vilket innebär att den bygger på maskininlärning från uppmärkta datamängder av naturligt språk, s.k. korpusar. Vår metod är också dependensbaserad, vilket innebär att parsning är en process som bygger en dependensgraf för varje mening, bestående av binära relationer mellan ord. Dessutom introducerar avhandlingen en ny metod för att koda frasstrukturer, en annan syntaktisk representationsform, som dependensgrafer vilka kan avkodas utan att information i frasstrukturen går förlorad. Denna metod möjliggör att en dependensbaserad parser kan användas för att syntaktiskt analysera frasstrukturer. Avhandlingen är baserad på fem artiklar, varav tre artiklar utforskar olika aspekter av maskininlärning för datadriven dependensparsning och två artiklar undersöker metoden för dependensbaserad frasstrukturparsning. Den första artikeln presenterar vår första storskaliga empiriska studie av parsning av naturligt språk (i detta fall svenska) med dependensrepresentationer. En transitionsbaserad deterministisk parsningsalgoritm skapar en dependensgraf för varje mening genom att härleda en sekvens av transitioner, och minnesbaserad inlärning (MBL) används för att förutsäga transitionssekvensen. Den andra artikeln undersöker ytterligare hur maskininlärning kan användas för att vägleda en transitionsbaserad dependensparser. Den empiriska studien jämför två metoder för maskininlärning med fem särdragsmodeller för tre språk (kinesiska, engelska och svenska), och studien visar att supportvektormaskiner (SVM) med lexikaliserade särdragsmodeller är bättre lämpade än MBL för att vägleda en transitionsbaserad dependensparser. Den tredje artikeln sammanfattar vår erfarenhet av att optimera MaltParser, vår implementation av transitionsbaserad dependensparsning, för ett stort antal språk. MaltParser har använts för att analysera över tjugo olika språk och var bland de främsta systemen i CoNLLs utvärdering 2006 och 2007. Den fjärde artikeln är vår första undersökning av dependensbaserad frastrukturparsning med konkurrenskraftiga resultat för parsning av tyska. Den femte och sista artikeln introducerar en förbättrad algoritm för att transformera frasstrukturer till dependensgrafer och tillbaka, vilket gör det möjligt att parsa kontinuerliga och diskontinuerliga frasstrukturer utökade med grammatiska funktioner. / Hall, Johan, 2008. Transition-Based Natural Language Parsing with Dependency and Constituency Representations, Acta Wexionensia No 152/2008. ISSN: 1404-4307, ISBN: 978-91-7636-625-7. Written in English. This thesis investigates different aspects of transition-based syntactic parsing of natural language text, where we view syntactic parsing as the process of mapping sentences in unrestricted text to their syntactic representations. Our parsing approach is data-driven, which means that it relies on machine learning from annotated linguistic corpora. Our parsing approach is also dependency-based, which means that the parsing process builds a dependency graph for each sentence consisting of lexical nodes linked by binary relations called dependencies. However, the output of the parsing process is not restricted to dependency-based representations, and the thesis presents a new method for encoding phrase structure representations as dependency representations that enable an inverse transformation without loss of information. The thesis is based on five papers, where three papers explore different ways of using machine learning to guide a transition-based dependency parser and two papers investigate the method for dependency-based phrase structure parsing. The first paper presents our first large-scale empirical study of parsing a natural language (in this case Swedish) with labeled dependency representations using a transition-based deterministic parsing algorithm, where the dependency graph for each sentence is constructed by a sequence of transitions and memory-based learning (MBL) is used to predict the transition sequence. The second paper further investigates how machine learning can be used for guiding a transition-based dependency parser. The empirical study compares two machine learning methods with five feature models for three languages (Chinese, English and Swedish), and the study shows that support vector machines (SVM) with lexicalized feature models are better suited than MBL for guiding a transition-based dependency parser. The third paper summarizes our experience of optimizing and tuning MaltParser, our implementation of transition-based parsing, for a wide range of languages. MaltParser has been applied to over twenty languages and was one of the top-performing systems in the CoNLL shared tasks of 2006 and 2007. The fourth paper is our first investigation of dependency-based phrase structure parsing with competitive results for parsing German. The fifth paper presents an improved encoding method for transforming phrase structure representations into dependency graphs and back. With this method it is possible to parse continuous and discontinuous phrase structure extended with grammatical functions.
5

AUTOMATIC EXTRACTION OF TRANSLATION PATTERNS FROM BILINGUAL LEGAL CORPUS

Inagaki, Yasuyoshi, Matsubara, Shigeki, Ohara, Makoto 26 October 2003 (has links)
No description available.
6

Tree Transformations in Inductive Dependency Parsing

Nilsson, Jens January 2007 (has links)
This licentiate thesis deals with automatic syntactic analysis, or parsing, of natural languages. A parser constructs the syntactic analysis, which it learns by looking at correctly analyzed sentences, known as training data. The general topic concerns manipulations of the training data in order to improve the parsing accuracy. Several studies using constituency-based theories for natural languages in such automatic and data-driven syntactic parsing have shown that training data, annotated according to a linguistic theory, often needs to be adapted in various ways in order to achieve an adequate, automatic analysis. A linguistically sound constituent structure is not necessarily well-suited for learning and parsing using existing data-driven methods. Modifications to the constituency-based trees in the training data, and corresponding modifications to the parser output, have successfully been applied to increase the parser accuracy. The topic of this thesis is to investigate whether similar modifications in the form of tree transformations to training data, annotated with dependency-based structures, can improve accuracy for data-driven dependency parsers. In order to do this, two types of tree transformations are in focus in this thesis. %This is a topic that so far has been less studied. The first one concerns non-projectivity. The full potential of dependency parsing can only be realized if non-projective constructions are allowed, which pose a problem for projective dependency parsers. On the other hand, non-projective parsers tend, among other things, to be slower. In order to maintain the benefits of projective parsing, a tree transformation technique to recover non-projectivity while using a projective parser is presented here. The second type of transformation concerns linguistic phenomena that are possible but hard for a parser to learn, given a certain choice of dependency analysis. This study has concentrated on two such phenomena, coordination and verb groups, for which tree transformations are applied in order to improve parsing accuracy, in case the original structure does not coincide with a structure that is easy to learn. Empirical evaluations are performed using treebank data from various languages, and using more than one dependency parser. The results show that the benefit of these tree transformations used in preprocessing and postprocessing to a large extent is language, treebank and parser independent.
7

Tree Transformations in Inductive Dependency Parsing

Nilsson, Jens January 2007 (has links)
This licentiate thesis deals with automatic syntactic analysis, or parsing, of natural languages. A parser constructs the syntactic analysis, which it learns by looking at correctly analyzed sentences, known as training data. The general topic concerns manipulations of the training data in order to improve the parsing accuracy. Several studies using constituency-based theories for natural languages in such automatic and data-driven syntactic parsing have shown that training data, annotated according to a linguistic theory, often needs to be adapted in various ways in order to achieve an adequate, automatic analysis. A linguistically sound constituent structure is not necessarily well-suited for learning and parsing using existing data-driven methods. Modifications to the constituency-based trees in the training data, and corresponding modifications to the parser output, have successfully been applied to increase the parser accuracy. The topic of this thesis is to investigate whether similar modifications in the form of tree transformations to training data, annotated with dependency-based structures, can improve accuracy for data-driven dependency parsers. In order to do this, two types of tree transformations are in focus in this thesis. The first one concerns non-projectivity. The full potential of dependency parsing can only be realized if non-projective constructions are allowed, which pose a problem for projective dependency parsers. On the other hand, non-projective parsers tend, among other things, to be slower. In order to maintain the benefits of projective parsing, a tree transformation technique to recover non-projectivity while using a projective parser is presented here. The second type of transformation concerns linguistic phenomena that are possible but hard for a parser to learn, given a certain choice of dependency analysis. This study has concentrated on two such phenomena, coordination and verb groups, for which tree transformations are applied in order to improve parsing accuracy, in case the original structure does not coincide with a structure that is easy to learn. Empirical evaluations are performed using treebank data from various languages, and using more than one dependency parser. The results show that the benefit of these tree transformations used in preprocessing and postprocessing to a large extent is language, treebank and parser independent.
8

The mat sat on the cat : investigating structure in the evaluation of order in machine translation

McCaffery, Martin January 2017 (has links)
We present a multifaceted investigation into the relevance of word order in machine translation. We introduce two tools, DTED and DERP, each using dependency structure to detect differences between the structures of machine-produced translations and human-produced references. DTED applies the principle of Tree Edit Distance to calculate edit operations required to convert one structure into another. Four variants of DTED have been produced, differing in the importance they place on words which match between the two sentences. DERP represents a more detailed procedure, making use of the dependency relations between words when evaluating the disparities between paths connecting matching nodes. In order to empirically evaluate DTED and DERP, and as a standalone contribution, we have produced WOJ-DB, a database of human judgments. Containing scores relating to translation adequacy and more specifically to word order quality, this is intended to support investigations into a wide range of translation phenomena. We report an internal evaluation of the information in WOJ-DB, then use it to evaluate variants of DTED and DERP, both to determine their relative merit and their strength relative to third-party baselines. We present our conclusions about the importance of structure to the tools and their relevance to word order specifically, then propose further related avenues of research suggested or enabled by our work.
9

Enhancing ESG-Risk Modelling - A study of the dependence structure of sustainable investing / Utvecklad ESG-Risk Modellering - En studie på beroendestrukturen av hållbara investeringar

Berg, Edvin, Lange, Karl Wilhelm January 2020 (has links)
The interest in sustainable investing has increased significantly during recent years. Asset managers and institutional investors are urged to invest more sustainable from their stakeholders, reducing their investment universe. This thesis has found that sustainable investments have a different linear dependence structure compared to the regional markets in Europe and North America, but not in Asia-Pacific. However, the largest drawdowns of an sustainable compliant portfolio has historically been lower compared to the a random market portfolio, especially in Europe and North America. / Intresset för hållbara investeringar har ökat avsevärt de senaste åren. Fondförvaltare och institutionella investerare är, från deras intressenter, manade att investera mer hållbart vilket minskar förvaltarnas investeringsuniversum. Denna uppsats har funnit att hållbara investeringar har en beroendestruktur som är skild från de regionala marknaderna i Europa och Nordamerika, men inte för Asien-Stillahavsregionen. De största värdeminskningarna i en hållbar portfölj har historiskt varit mindre än värdeminskningarna från en slumpmässig marknadsportfölj, framförallt i Europa och Nordamerika.
10

Multigramatiky a syntaktická analýza založená na nich / Multigrammars and Parsing Based on Them

Fiala, Jiří Unknown Date (has links)
This document deals with introduction focused on pragmatically oriented research at branch of theoretical computer science and with presentation of designed methods for chosen application topics. At this study the theoretical subject is represented by kind of generative system - multisequential grammar and application topics are chosen according to possibilities supported by multisequential grammars. In order to follow results published by Thompson (see [9]), Lindenmayer (see [26]), Mandelbrot (see [8]) and also studies published by Morneau (see [17]), which shows the relation between natural laws and human discipline - mathematics, we study the applications of multi-sequential grammars from two points of view: generative L-systems (which further includes applications of fractal geometry and biomathematics) and natural language processing (which further includes the design of proper abstract language). Some problems related to compiler construction are also mentioned.

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