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Dissertations / Theses on the topic 'Translation invariance'
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Misieng, Jecky. "Translation, Adaptation and Invariance Testing of the Teaching Perspectives Inventory: Comparing Faculty of Malaysia and the United States." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4921.
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As a result of growing attention in cross-cultural research, existing measurement instruments developed in one language are being translated and adapted for use in other languages and cultural contexts. The benefits of having the same instrument across cultures can only be realized if the process of translation and adaptation of the measurement instruments produces measurement operations that function similarly across national and cultural boundaries. Producing invariant measurement instruments that assess educational and psychological constructs provide a way of testing the cross-cultural generality of theories that include these constructs.
The major purposes of the study were to translate and adapt the Teaching Perspectives Inventory (Pratt, 1992, 1990) from English to Bahasa Malaysia and compare the psychometric properties of the two versions. The TPI is an instrument developed by Pratt (1992) to ascertain the different conceptions that teachers in higher education have about teaching. The TPI has 45 items, which are divided into five subscales or perspectives referred to as Transmission, Apprenticeship, Developmental, Nurturing, and Social Reform. The first phase of this study translated and adapted the TPI from English into the Malay language of Malaysia or Bahasa Malaysia (BM) using multiple approaches as recommended by the International Test Commission. The approaches used to translate the TPI included forward and back translations, an expert panel review, a pilot study, and cognitive interviews. In the translation process, three initial translators, two back translators, and six expert panel members, including the researcher, came up with a pre-final version of the Malay TPI. During the translation process, two items were found to contain expressions that had no exact equivalent forms in Malay: "virtuoso performers" and "higher ideals." Overall, translating the TPI was a challenging task due to the relatively large number of items in the instrument (45) as well as the complexity and very abstract nature of the constructs. Many of the words and expressions that were brief and concise in the English version became longer and more verbose when translated in Malay. As a result, the translated TPI version appeared longer than the original version. Pilot testing with 25 native speakers of Malay who were faculty members from a number of public universities in Malaysia revealed nine items that needed modification. Cognitive interviewing with five participants from the pilot group revealed one item requiring a change by adding a borrowed word "novis" in brackets next to the Malay expressions, which refers to the original word novice. Due to the confusion with the words referring to `people' in many of the items, additional instructions were added at the beginning of the survey to ensure that the participants responded according to the original intention of the items, which focuses on learners in the faculty's specific classroom context instead of people in the society in general. Following changes to the TPI, this instrument was administered in phase two to a Malaysian sample of 561 faculty.
In the second phase, the study assessed the psychometric properties of the original English version of the TPI with 605 faculty in the U. S. and the translated TPI version of the TPI with the Malaysian sample. The overall internal consistency reliability of both the English (α=.88) and the Malay TPI (α=.93) appeared to be adequate. At the subscale level, the internal consistency reliabilities of all the scales were on the lower side considering the large number of items (9) for each subscale (range = .67 to .83 for the U. S. and .59 to .81 for Malaysia). It was found that three out of the five subscales of the U. S. and Malay TPI had similar alpha reliabilities (Apprenticeship, Nurturing, Social Reform). To assess the cross-cultural factorial validity and measurement invariance of the TPI, confirmatory factor analysis (CFA) was carried out for both the original and the Malay TPI. The sample size for the U. S. group was 605 and the Malay group was 561. The fit for both the U. S. and the Malay correlated five-factor models was less than adequate with the Malay model showing a much worse fit. Correlated errors were found between 64 item pairs in the U. S. model and 389 item pairs in the Malay model. The correlations between the five perspectives in the Malay sample were much higher than those in the U. S. sample suggesting that the perspectives had limited discriminant validity. For example, the correlations between the Nurturing and Developmental perspectives and Nurturing and Social Reform perspectives were 1.0. The inadequate fit of the five-factor correlated model in the Malaysian sample and the minimally acceptable fit in the U. S. sample led to the decision to carry out analyses and compare the groups one subscale at a time. Model modifications for each subscale of both samples were carried out to improve the fit by adding one or more parameters (i.e., correlated errors) for each subscale model to obtain acceptable baseline models. The results of the invariance testing for each subscale did not support the existence of measurement invariance. Overall, the results indicate that the Malay version of the TPI is not ready for use and additional translation and adaptation work is recommended. Future efforts could incorporate improvements in the translation process in the form of recruiting a larger number of certified translators who have in-depth knowledge of teaching in higher education as well as a deep knowledge of the philosophy and purposes behind the TPI. Additional cognitive interviews before and after pretesting and pilot testing of the pre-final version are recommended. Finally, adding a large sample of bilingual educators who would complete both the Malay and English versions of the TPI would provide important psychometric data on the equivalence of the TPI items.
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Liu, Yan. "Rotation, scaling and translation invariant digital image watermarking." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26699.
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Many digital image watermarking schemes have been proposed and are robust to common signal processing, such as compression and filtering. Geometric distortions, such as rotation, scaling, and translation (RST), are considered the most challenging attacks. This thesis is on RST invariant digital image watermarking.
In this thesis, we introduce the fundamental theories and techniques necessary for RST invariant digital image watermarking, and briefly review the existing RST invariant image watermarking schemes. Then, we propose an image rectification scheme for RST invariant digital image watermarking. Rotation and scaling transformations in the spatial domain result in cyclical shifts in the log-polar domain, which is the log-polar mapping (LPM) of the magnitude of the Fourier spectrum of the image. We utilize this property to detect the rotation and scaling parameters by using a matching template and our new phase-only filtering method in the LPM domain. We employ the same strategy in the spatial domain to detect the translation parameters. This rectification scheme can detect RST parameters very accurately. (Abstract shortened by UMI.)
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Lücking, Simon [Verfasser]. "The Daugavet Property and Translation-Invariant Subspaces / Simon Lücking." Berlin : Freie Universität Berlin, 2014. http://d-nb.info/1054163154/34.
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Stahl, Christoph [Verfasser]. "Translation invariant quantum walks with discrete symmetries / Christoph Stahl." Hannover : Gottfried Wilhelm Leibniz Universität, 2018. http://d-nb.info/1161096795/34.
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Woo, Myung Chul. "Biologically-inspired translation, scale, and rotation invariant object recognition models /." Online version of thesis, 2007. http://hdl.handle.net/1850/3933.
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Pavel, Dimovski. "Translation invariant Banach spaces of distributions and boundary values of integral transform." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=93767&source=NDLTD&language=en.
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We use common notation ∗ for distribution (Scshwartz), (Mp) (Beurling) i {Mp} (Roumieu) setting. We introduce and study new (ultra) distribution spaces, the test function spaces D∗E and their strong duals D'∗E’*.These spaces generalize the spaces D∗Lq , D'∗Lp , B’* and their weighted versions. The construction of our new (ultra)distribution spaces is based on the analysis of a suitable translation-invariant Banach space of (ultra)distribution E with continuous translation group, which turns out to be a convolution module over the Beurling algebra L1ω, where the weight ω is related to the translation operators on E. The Banach space E’∗ stands for L1ωˇ ∗ E’. We apply our results to the study of the convolution of ultradistributions. The spaces of convolutors O’∗C (Rn) for tempered ultradistributions are analyzed via the duality with respect to the test functionspaces O∗C (Rn), introduced in this thesis. Using the properties of translationinvariantBanach space of ultradistributions E we obtain a full characterization ofthe general convolution of Roumieu ultradistributions via the space of integrableultradistributions is obtained. We show: The convolution of two Roumieu ultradistributions T, S ∈ D’{Mp} (Rn) exists if and only if (φ ∗ Š) T ∈ D’{Mp}L1(Rn) for every φ ∈ D {Mp} (Rn). We study boundary values of holomorphic functions defined in tube domains. New edge of the wedge theorems are obtained. The resultsare then applied to represent D’E’* as a quotient space of holomorphic functions.We also give representations of elements of D’E’* via the heat kernel method.Koristimo oznaku ∗ za distribuciono (Svarcovo), (Mp) (Berlingovo) i {Mp} (Roumieuovo) okruženje. Uvodimo i prouavamo nove (ultra)distribucione prostore, test funkcijske prostore D∗E i njihove duale D'∗E'*. Ovi prostori uopštavaju prostore D∗Lq , D'∗Lp , B'∗ i njihove težinske verzije. Konstrukcija naših novih (ultra)distribucionih prostora je zasnovana na analizi odgovarajuićh translaciono - invarijantnih Banahovih prostora (ultra)distribucija koje označavamo sa E. Ovi prostori imaju neprekidnu grupu translacija, koja je konvolucioni modul nad Beurlingovom algebrom L1ω, gde je težina ω povezana sa operatorima translacije prostora E. Banahov prostor E'∗ označava prostor L1ω˅ ∗ E'. Koristeći dobijene rezultata proučavamo konvoluciju ultradistribucija. Prostori konvolutora O'∗C (Rn) temperiranih ultradistribucija, analizirani su pomoću dualnosti test funkcijskih prostora O∗C (Rn), definisanih u ovoj tezi. Koristeći svojstva translaciono - invarijantnih Banahovih prostora temperiranih ultradistribucija, opet označenih sa E, dobijamo karakterizaciju konvolucije Romuieu-ovih ultradistribucija, preko integrabilnih ultradistribucija. Dokazujemo da: konvolucija dve Roumieu-ove ultradistribucija T, S ∈ D'{Mp} (Rn) postoji ako i samo ako (φ ∗ Sˇ)T ∈ D'{Mp} L1 (Rn) za svaki φ ∈ D{Mp}(Rn). Takođe, proučavamo granične vrednosti holomorfnih funkcija definisanih na tubama. Dokazane su nove teoreme ”otrog klina”. Rezultati se zatim koriste za prezentaciju D'E'∗ preko faktor prostora holomorfnih funkcija. Takođe, data je prezentacija elemente D'E'∗ koristeći heat kernel metode.
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Erturk, Alp. "Rotation, Scale And Translation Invariant Automatic Target Recognition Using Template Matching For Satellite Imagery." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12611434/index.pdf.
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In this thesis, rotation, scale and translation (RST) invariant automatic target recognition (ATR) for satellite imagery is presented. Template matching is used to realize the target recognition. However, unlike most of the studies of template matching in the literature, RST invariance is required in our problem, since most of the time we will have only a small number of templates of each target, while the targets to be recognized in the scenes will have various orientations, scaling and translations. RST invariance is studied in detail and implemented with some of the competing methods in the literature, such as Fourier-Mellin transform and bipectrum combined with log-polar mapping. Phase correlation and normalized cross-correlation are used as similarity metrics. Encountered drawbacks were overcome with additional operations and modifications of the algorithms. ATR using reconstruction of the target image with respect to the template, based on bispectrum, log-polar mapping and phase correlation outperformed the other methods and successful recognition was realized for various target types, especially for targets on relatively simpler backgrounds, i.e. containing little or no other objects.
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Merkert, Dennis [Verfasser], and Bernd [Akademischer Betreuer] Simeon. "Numerical Homogenization for Linear Elasticity in Translation Invariant Spaces / Dennis Merkert ; Betreuer: Bernd Simeon." Kaiserslautern : Technische Universität Kaiserslautern, 2018. http://d-nb.info/1163274607/34.
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Pratt, John Graham le Maistre. "Application of the Fourier-Mellin transform to translation-, rotation- and scale-invariant plant leaf identification." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33440.
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The Fourier-Mellin transform was implemented on a digital computer and applied towards the recognition and differentiation of images of plant leaves regardless of translation, rotation or scale. Translated, rotated and scaled leaf images from seven species of plants were compared: avocado ( Persea americana), trembling aspen (Populus tremuloides), lamb's-quarter (Chenopodium album), linden (Tilla americana), silver maple (Acer saccharinum), plantain (Plantago major) and sumac leaflets (Rhus typhina ). The rate of recognition was high among translated and rotated leaf images for all plant species. The rates of recognition and differentiation were poor, however, among scaled leaf images and between leaves of different species. Improvements to increase the effectiveness of the algorithm are suggested.
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Belk, Michaël. "Stabilité structurelle de solutions invariantes par translation : application à des problèmes de réaction-diffusion avec convection." Lyon 1, 2003. http://www.theses.fr/2003LYO10260.
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La thèse est consacrée à la stabilité structurelle de solutions d'équations différentielles invariantes par translation. On s'interesse en particulier aux ondes de réaction-diffusion et aux solutions homocliniques de systèmes différentiels ordinaires. La théorie des opérateurs de Fredholm est utilisée pour prouver l'existence d'ondes de réaction-diffusion avec convection, lesquelles sont aussi étudiées numériquement et comparées à des expérience sur la photopolymérisation avec convection. Dans le problème d'explosion thermique avec convection, la dynamique complexe liée aux bifurcations successives et l'explosion thermique oscillante sont étudiées numériquement. Pour ce problème, on propose un modèle simplifié que l'on utilise pour étudier les bifurcations des solutions périodiques à partir des orbites homocliniques.
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Maragos, Petros A. "A unified theory of translation-invariant systems with applications to morphological analysis and coding of images." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/14833.
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Senin, Vitalii [Verfasser], Michael [Akademischer Betreuer] Scheutzow, Michael [Gutachter] Scheutzow, and Marc [Gutachter] Keßeböhmer. "Pesin's formula for translation invariant random dynamical systems / Vitalii Senin ; Gutachter: Michael Scheutzow, Marc Keßeböhmer ; Betreuer: Michael Scheutzow." Berlin : Technische Universität Berlin, 2019. http://d-nb.info/1202071406/34.
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Kesler, Joseph Michael. "Automated Alignment of Aircraft Wing Radiography Images Using a Modified Rotation, Scale, and Translation Invariant Phase Correlation Algorithm Employing Local Entropy for Peak Detection." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1218604857.
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Rinderknecht, Cornelia. "Post-translational regulation of class II MHC by affinity for class II-associated invariant chain peptides (CLIP) : implications for autoimmunity /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
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Heimisson, Gudmundur Torfi. "A Cross-Cultural Adaptation of the Irrational Beliefs Inventory from English to Icelandic." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3145.
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The Irrational Beliefs Inventory (IBI) was built to measure self-defeating beliefs as conceptualized in Rational-Emotive Behavior Therapy. The IBI has five factors: worrying, rigidity, problem avoidance, need for approval, and emotional irresponsibility. A three-phase cross-cultural study was conducted to translate and adapt the IBI from English to Icelandic, and a Confirmatory Factor Analysis (CFA) approach was used for a test of factorial validity and cross-cultural invariance.
In Phase 1, the IBI was translated from English to Icelandic, using a forward-translation and back-translation. Two forward-translators and two back-translators were recruited. In Phase 2, qualitative interview methods were used in both the U.S. and Iceland to gain insights into the meaning of the items on the IBI. In the U.S., 21 university students provided insights in a group discussion, and four students were individually interviewed in depth about individual items on the IBI. In Iceland, four university students were interviewed in depth about the meaning of individual items. Three Icelandic psychology professionals were recruited to evaluate the appropriateness of the IBI for the Icelandic culture. In Phase 3, a Confirmatory Factor Analysis (CFA) was conducted to check factorial validity and cross-cultural invariance of the IBI. The total sample size in Phase 3 was N=1547, all college students, with n=827 in the U.S. and n=720 in Iceland. Overall, the CFA did not support the fit of the IBI's original five-factor model, although the fit was slightly better in the Icelandic version. Fit indices conflicted; the chi-square and comparative fit index (CFI) showed poor fit, while the RMSEA and SRMR showed acceptable fit. Correlated error was found between 85 item pairs in the U.S. model, and between 68 item pairs in the Icelandic model. Modifications were attempted to the original model by including the correlated errors, and a multigroup CFA was conducted. Adding the correlated errors slightly improved the fit of both models, but only 11 out of the IBI's 50 items were found to have equivalent item factor loadings and intercepts between the countries. Results from the psychometric analysis and qualitative interviews indicated that the IBI needs to be rewritten if the measure is to be used for research in Iceland. The results were discussed in light of a recent analysis of REBT-based measurement instruments, and implications for cross-cultural research on highly abstract constructs such as irrationality were discussed.
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Villaron, Emilie. "Modèles aléatoires harmoniques pour les signaux électroencéphalographiques." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4815.
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Cette thèse s'inscrit dans le contexte de l'analyse des signaux biomédicaux multicapteurs par des méthodes stochastiques. Les signaux auxquels nous nous intéressons présentent un caractère oscillant transitoire bien représenté par les décompositions dans le plan temps-fréquence c'est pourquoi nous avons choisi de considérer non plus les décours temporels de ces signaux mais les coefficients issus de la décomposition de ces derniers dans le plan temps-fréquence. Dans une première partie, nous décomposons les signaux multicapteurs sur une base de cosinus locaux (appelée base MDCT) et nous modélisons les coefficients à l'aide d'un modèle à états latents. Les coefficients sont considérés comme les réalisations de processus aléatoires gaussiens multivariés dont la distribution est gouvernée par une chaîne de Markov cachée. Nous présentons les algorithmes classiques liés à l'utilisation des modèles de Markov caché et nous proposons une extension dans le cas où les matrices de covariance sont factorisées sous forme d'un produit de Kronecker. Cette modélisation permet de diminuer la complexité des méthodes de calcul numérique utilisées tout en stabilisant les algorithmes associés. Nous appliquons ces modèles à des données électroencéphalographiques et nous montrons que les matrices de covariance représentant les corrélations entre les capteurs et les fréquences apportent des informations pertinentes sur les signaux analysés. Ceci est notamment illustré par un cas d'étude sur la caractérisation de la désynchronisation des ondes alpha dans le contexte de la sclérose en plaquesThis thesis adresses the problem of multichannel biomedical signals analysis using stochastic methods. EEG signals exhibit specific features that are both time and frequency localized, which motivates the use of time-frequency signal representations. In this document the (time-frequency labelled) coefficients are modelled as multivariate random variables. In the first part of this work, multichannel signals are expanded using a local cosine basis (called MDCT basis). The approach we propose models the distribution of time-frequency coefficients (here MDCT coefficients) in terms of latent variables by the use of a hidden Markov model. In the framework of application to EEG signals, the latent variables describe some hidden mental state of the subject. The latter control the covariance matrices of Gaussian vectors of fixed-time vectors of multi-channel, multi-frequency, MDCT coefficients. After presenting classical algorithms to estimate the parameters, we define a new model in which the (space-frequency) covariance matrices are expanded as tensor products (also named Kronecker products) of frequency and channels matrices. Inference for the proposed model is developped and yields estimates for the model parameters, together with maximum likelihood estimates for the sequences of latent variables. The model is applied to electroencephalogram data, and it is shown that variance-covariance matrices labelled by sensor and frequency indices can yield relevant informations on the analyzed signals. This is illustrated with a case study, namely the detection of alpha waves in rest EEG for multiple sclerosis patients and control subjects
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Milce, Aril. "Fonctions Presque Automorphes et Applications aux EquationsDynamiques sur Time Scales." Thesis, Antilles, 2015. http://www.theses.fr/2015ANTI0011/document.
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Dans cette thèse, nous affinons l'étude des fonctions presque automorphes sur time scales introduites dans la littérature par Lizama et Mesquita, nous explorons de nouvelles propriétés de ces fonctions et appliquons les résultats à étudier l'existence et l'unicité de solution presque automorphe d'une nouvelle classe d'équations dynamiques sur time scales. Puis nous introduisons la notion de fonction presque automorphe de classe Cn, nous investiguons les propriétés fondamentales de ces fonctions et utilisons les résultats pour établir l'existence, l'unicité et la stabilité globale et exponentielle de solution presque automorphe de classe C1 d'un système d'équations dynamiques avec délai variable fini modélisant un réseau de neurones. Ensuite nous présentons le concept de fonctions asymptotiquement presque automorphes de classe Cn. Nous démontrons quasiment toutes les propriétés de ces fonctions, lesquelles nous permettent, sous des hypothèses convenables, d'établir, d'une part, que l'unique solution d'un problème avec condition initiale est asymptotiquement presque automorphe de classe C1, et d'autre part, l'existence et l'unicité de solution asymptotiquement presque automorphe pour une équation intégro-dynamque avec conditon initiale non locale sur time scales. Enfin, en utilisant la notion de semi-groupe sur time scales de Hamza et Oraby, nous généralisons les résultats de Lizama et Mesquita en dimension infinie, c'est-à-dire, nous étudions l'existence et l'unicité des solutions presque automorphes pour des équations dynamiques semi linéaires abstraites sur time scalesIn this thesis, we refine the notion of almost automorphic functions on time scales introduced in the literature by Lizama and Mesquita, we explore some new properties of such functions and apply the results to study the existence and uniqueness of almost automorphic solution for a new class of dynamic equations on time scales. Then we introduce the concept of almost automorphic functions of order n on time scales, we investigate the fundamental properties of these functions and we use the findings to establish the existence and uniqueness and the global stability of almost automorphic solution of one to a first order dynamical equation with finite time varying delay. Then we present the concept of asymptotically almost automorphic functions of order n on time scales. We study the properties of these functions and we use the results to prove, under suitable hypothesis, that the unique solution to a problem with initial condition is asymptotically almost automorphic of order one at the one hand, and the existence and uniqueness of asymptotically almost automorphic solution for an integro-dynamic equation with nonlocal initial conditon on time scales in other hand. Finally, using the concept of semigroup on time scales introduced by Hamza and Oraby, we generalize the results in Lizama and Mesquita's paper for abstract Banach spaces, that is, we study the existence and uniqueness of almost automorphic solution for semilinear abstract dynamic equations on time scales
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Snežana, Gordić. "Generalized stochastic processes with applications in equation solving." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=110199&source=NDLTD&language=en.
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In this dissertation stochastic processes are regarded in the framework of Colombeau-type algebras of generalized functions. Such processes are called Colombeau stochastic processes.The notion of point values of Colombeau stochastic processes in compactly supported generalized points is established. The Colombeau algebra of compactly supported generalized constants is endowed with the topology generated by sharp open balls. The measurability of the corresponding random variables with values in the Colombeau algebra of compactly supported generalized constants is shown.The generalized correlation function and the generalized characteristic function of Colombeau stochastic processes are introduced and their properties are investigated. It is shown that the characteristic function of classical stochastic processes can be embedded into the space of generalized characteristic functions. Examples of generalized characteristic function related to gaussian Colombeau stochasticprocesses are given. The structural representation of the generalized correlation function which is supported on the diagonal is given. Colombeau stochastic processes with independent values are introduced. Strictly stationary and weakly stationary Colombeau stochastic processes are studied. Colombeau stochastic processes with stationary increments are characterized via their stationarity of the gradient of the process.Gaussian stationary solutions are analyzed for linear stochastic partial differential equations with generalized constant coefficients in the framework of Colombeau stochastic processes.U disertaciji se stohastički procesi posmatraju u okviru Kolomboove algebre uopštenih funkcija. Takve procese nazivamo Kolomboovi stohastički procesi. Pojam vrednosti Kolomboovog stohastičkog procesa u tačkama sa kompaktnim nosačem je uveden. Dokazana je merljivost odgovarajuće slučajne promenljive sa vrednostima u Kolomboovoj algebri uopštenih konstanti sa kompaktnim nosačem, snabdevenom topologijom generisanom oštrim otvorenim loptama. Uopštena korelacijska funkcija i uopštena karakteristična funkcija Kolomboovog stohastičkog procesa su definisane i njihove osobine su izučavane. Pokazano je da se karakteristična funkcija klasičnog stohastičkog procesa može potopiti u prostor uopštenih karakterističnih funkcija. Dati su primeri uopštenih karakterističnih funkcija gausovskih Kolomboovih stohastičkih procesa. Data je strukturna reprezentacija uopštene korelacijske funkcije sa nosačem na dijagonali. Kolomboovi stohastički procesi sa nezavisnim vrednostima su predstavljeni. Izučavani su strogo stacionarni i slabo stacionarni Kolomboovi stohastički procesi. Kolomboovi stohastički procesi sa stacionarnim priraštajima su okarakterisani preko stacionarnosti gradijenta procesa. Gausovska stacionarna rešenja za linearnu stohastičku parcijalnu diferencijalnu jednačinu sa uopštenim konstantnim koeficijentima su analizirana u okvirima Kolomboovih stohastičkih procesa.
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Vincent, Charles, R. Färe, and S. Grosskopf. "A translation invariant pure DEA model." 2015. http://hdl.handle.net/10454/17539.
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YesThis communication complements the DEA model proposed by Lovell and Pastor (1999), by incorporating both positive and negative criteria in the model. As such, we propose a DEA model, known as pure DEA, using a directional distance function approach.
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Tiedra, De Aldecoa Rafael. "Opérateurs conjugués et invariance de translation en théorie de la diffusion." Phd thesis, 2005. http://tel.archives-ouvertes.fr/tel-00011849.
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La thèse a pour sujet les propriétés spectrales et les propriétés de propagationd'hamiltoniens décrivant certains systèmes quantiques. La première partie donne
une description des propriétés spectrales d'une particule quantique évoluant dans un
nanotube courbe asymptotiquement droit. La deuxième partie est consacrée à l'analyse
de la stabilité des propriétés spectrales de certains opérateurs de Dirac magnétiques
sous l'effet de perturbations dues à l'ajout d'un potentiel matriciel. La troisième
partie est une étude consacrée à la notion de temps de retard accumulé par une
particule expérimentant une diffusion dans un guide d'ondes.
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Dill, Marcus, and Shimon Edelman. "Translation Invariance in Object Recognition, and Its Relation to Other Visual Transformations." 1997. http://hdl.handle.net/1721.1/7244.
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Human object recognition is generally considered to tolerate changes of the stimulus position in the visual field. A number of recent studies, however, have cast doubt on the completeness of translation invariance. In a new series of experiments we tried to investigate whether positional specificity of short-term memory is a general property of visual perception. We tested same/different discrimination of computer graphics models that were displayed at the same or at different locations of the visual field, and found complete translation invariance, regardless of the similarity of the animals and irrespective of direction and size of the displacement (Exp. 1 and 2). Decisions were strongly biased towards same decisions if stimuli appeared at a constant location, while after translation subjects displayed a tendency towards different decisions. Even if the spatial order of animal limbs was randomized ("scrambled animals"), no deteriorating effect of shifts in the field of view could be detected (Exp. 3). However, if the influence of single features was reduced (Exp. 4 and 5) small but significant effects of translation could be obtained. Under conditions that do not reveal an influence of translation, rotation in depth strongly interferes with recognition (Exp. 6). Changes of stimulus size did not reduce performance (Exp. 7). Tolerance to these object transformations seems to rely on different brain mechanisms, with translation and scale invariance being achieved in principle, while rotation invariance is not.
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Schneider, Robert, and Maximilian Riesenhuber. "A Detailed Look at Scale and Translation Invariance in a Hierarchical Neural Model of Visual Object Recognition." 2002. http://hdl.handle.net/1721.1/7178.
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The HMAX model has recently been proposed by Riesenhuber & Poggio as a hierarchical model of position- and size-invariant object recognition in visual cortex. It has also turned out to model successfully a number of other properties of the ventral visual stream (the visual pathway thought to be crucial for object recognition in cortex), and particularly of (view-tuned) neurons in macaque inferotemporal cortex, the brain area at the top of the ventral stream. The original modeling study only used ``paperclip'' stimuli, as in the corresponding physiology experiment, and did not explore systematically how model units' invariance properties depended on model parameters. In this study, we aimed at a deeper understanding of the inner workings of HMAX and its performance for various parameter settings and ``natural'' stimulus classes. We examined HMAX responses for different stimulus sizes and positions systematically and found a dependence of model units' responses on stimulus position for which a quantitative description is offered. Interestingly, we find that scale invariance properties of hierarchical neural models are not independent of stimulus class, as opposed to translation invariance, even though both are affine transformations within the image plane.
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Jhu-JyunHsu and 許筑鈞. "Translation and Validation of the Chinese Team Identification Scale: Testing of Cross-National Invariance across Taiwan and the United States." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/c4s45e.
Full textAbstract:
碩士國立成功大學
體育健康與休閒研究所
104
The purpose of this study is to translate the TIS, which measures team identification as multiple dimensions, into Chinese. The seven-step methodology developed by Vallerand (1989) was utilized in this study. The reliability and validity of the translated version were further examined in its application to explore the relationship between team identification and consumption behaviors. This study collected 587 responses from CPBL, 325 responses from HBL and SBL in Taiwan, and 134 responses from MLB in the United States of America. The results showed that (1) due to the stringent method of Vallerand (1989), the translated TIS is a reliable and valid scale to measure team identification; (2) it is invariant across the translated and original versions to measure team identification with TIS; (3) team identification has a significant positive impact on consumption behaviors. Based on the results, team managers and marketers can apply similar strategies to encourage consumption behaviors. Finally, this study is expected to be applied to both academic studies and practical manipulation; the multidimensional perspective and scale of team identification can be utilized in the region of the world where Chinese is used, while the theoretical and practical suggestions can be practiced in sport marketing in Taiwan.
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Poulson, Jack Lesly. "Fast parallel solution of heterogeneous 3D time-harmonic wave equations." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-12-6622.
Full textAbstract:
Several advancements related to the solution of 3D time-harmonic wave
equations are presented, especially in the context of a parallel moving-PML sweeping preconditioner for problems without large-scale resonances. The main contribution of this dissertation is the introduction of an efficient parallel sweeping preconditioner and its subsequent application to several challenging velocity models. For instance, 3D seismic problems approaching a billion degrees of freedom have been solved in just a few minutes using several thousand processors. The setup and application costs of the sequential algorithm were also respectively refined to O(γ^2 N^(4/3)) and O(γ N log N), where N denotes the total number of degrees of freedom in the 3D volume and γ(ω) denotes the modestly frequency-dependent number of grid points per Perfectly Matched Layer discretization.
Furthermore, high-performance parallel algorithms are proposed for performing multifrontal triangular solves with many right-hand sides, and a custom compression scheme is introduced which builds upon the translation
invariance of free-space Green’s functions in order to justify the replacement of each dense matrix within a certain modified multifrontal method with the sum of a small number of Kronecker products. For the sake of reproducibility, every algorithm exercised within this dissertation is made available as part of the open source packages Clique and Parallel Sweeping Preconditioner (PSP).text
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Cheng-Hao, Yao, and 姚正浩. "Translation, rotation and scale invariant color texture retrieval." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/12078041107303029610.
Full textAbstract:
碩士元智大學
資訊工程學系
89
A new method for color texture retrieval using color and edge features is proposed in this study. The proposed method unifies color and edge features rather than simply extend gray-level texture analysis to each channel of the color images, or analyze only color characteristics. More specifically, the distributions of color and local edge patterns are used to derive similarity measure of a pair of textured regions for color texture retrieval. Moreover, a segmentation method based on the similarity measure is employed to extend the retrieval method to natural image database. More important, since the proposed feature distributions are invariant to translation, rotation and scale variations, our method has the ability to retrieve textures which are changed in translation, rotation and scale. The effectiveness and practicability of the proposed method have been proven by various experiments.
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ZENG, YUAN-XIAN, and 曾元顯. "Associative mapping and translation, rotation, scale-invariant pattern recognition." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/11872579950912127601.
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Lee, Cheng-Long, and 李錦榮. "Translation, Rotation, and Scaling Invariant Pattern Recognition by Fuzzy Neural Networks." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/73768232434002506852.
Full textAbstract:
碩士國立交通大學
控制工程系
82
A hybrid pattern recognition system is described in this study which can recognize patterns with translation, rotation, scaling, and a combination of them. The system consists of two parts, i.e., the preprocessor and the fuzzy neuron classifier. The preprocessor, implemented by simple mapping techniques, generates the normalized input image. Next, the fuzzy neuron classifier associates the normalized input patterns with prototype patterns by making an optimal match of the weighted grade membership functions. A single layer gradient type algorithm is used to adapt the membership functions to the patterns to be recognized. Some numerical examples are provided to demonstrate the performance of the proposed technique.
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Li, Jin Rong, and 李錦榮. "Translation, rotation, and scaling invariant pattern recognition by fuzzy neural networks." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/01702677518212263247.
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Wang, Yi-Hua, and 王奕驊. "ELITE—A Novel Approach to Translation, Rotation, and Scale Invariant Template Matching." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/h49be7.
Full textAbstract:
碩士國立臺灣海洋大學
電機工程學系
102
This thesis aims to match patterns having translation, rotation, and scale differences in an input image. Through integration of advantages of area-based matching (ABM) and feature-based matching (FBM) approaches, a novel pattern matching algorithm called Equalized Length Identification to Evaluation (ELITE) is proposed. ELITE mainly consists of a circular sampling process, interpolations of the sampled data, and establishment of estimation space. Unlike other circular sampling methods [14,15,16], in ELITE the circumference of shorter sampling circles is extended to a length equal to the longest sampling circles by interpolations. A continuous profile can be obtained by stacking multiple extended data in parallel, and interestingly, patterns of different scales would share a similar profile form with a gradual change, this correlation property is used to create a scale-estimation feature set effective to achieve both the rotation invariance and scale invariance. Also noteworthy is that such equalization profile extracted from a target pattern is just like a unique identification or fingerprint for the target pattern. It is not affected by the sampling range, and more desirably, it is identifiable and estimable. Experimental results show that, the proposed ELITE not only is able to locate or identify multiple patterns under influences of rotation and scaling, but also enables to access the rotational orientation and the scale of the input pattern. ELITE also exhibits a certain degree of tolerance to affine distortion.
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Chih-LunLiu and 劉誌倫. "Parallelized Rotation-Scaling-Translation-Invariant Template Matching on Embedded Multi-Core Platform." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/rj92gu.
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Chen, Shih-Min, and 陳士民. "Rotation, Translation, and Scale Invariant Bag of Feature based on Feature Density." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/14962400969645161689.
Full textAbstract:
碩士國立中正大學
資訊工程研究所
103
In human vision, people can easily recognize object in image with any size, location at any position, at any angle, and with complicated background. But in computer vision, it is hard to achieve image recognition with such invariance. Spatial Pyramid Matching (SPM) has excellent performance on computer vision applications. However, SPM still meets the difficulty when the position of object changes in images. In recent year, researchers try to find a robust representation. For example, translation invariant, rotation invariant, and scale invariant features. There are works trying to solve this issue. However, they just deal with one of three invariants respectively. It lacks a robust representation that can handle three invariant simultaneously. In our work, we aim to develop a robust feature that achieves translation, rotation, and scale invariant simultaneously. To handle this problem, we propose a novel method named Block Based Integral Image to search the densest region of features and constraint the region size similar to a predefined region size, and further find the approximated center of object in image. Then, we apply SPR by replacing the image center with the approximated object center to handle translation and rotation invariance problem. After that, we use histogram equalization to adjust captured representation for scale invariant. After the adjustment, a robust representation can be obtained to handle translation, rotation, and scale invariance simultaneously. Finally, we verify our system on different datasets on image classification task. Experimental results show that our system indeed can deal with translation, rotation, and scale invariant simultaneously and achieve higher accuracy than the previous methods.
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Lin, Tsu-ping, and 林子平. "Performance Assessment of Taiwan’s Securities: An Application of the Output Translation Invariant DEA Model." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/e322zw.
Full textAbstract:
碩士國立高雄大學
國際高階經營管理碩士在職專班(IEMBA)
103
Securities have been played important role in the financial industry all over that world. The trading volume of Taiwanese security market booms in 1980s due to the open-up of new business frame and the relaxation of security establishment restrictions. This shows that the security industry also plays a significant role in Taiwanese financial and capital market. In order to steady the development of security market, the evaluation of security companies’ operation performance becomes very important. However, there might be some undesirable output, such as revenue losses, while running a securities firm. The purpose of this article aims to take these undesirable outputs into consideration investigating the difference of operation performance between financial-holding and non-financial-holding integrated securities firms. We then propose some managerial and political suggestions according to the empirical results. Our result indicates that the non-financial-holding securities firms is significant higher than financial-holding securities firms in terms of the weight of pure technology efficiency, weight of operational revenue, and weight of non-operational revenue. Secondly, the results show insignificant difference during the observation period (2010-2012). Finally, we suggest that 34 securities firms need to expand their operation size through mergers and acquisitions, 4 firms are required to reduce the operation scale, and the rest of the samples reveals in the optimal business scale.
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Liu, Yi Qing, and 劉逸青. "A new approach to pattern recognition invariant to translation, rotation, and changes of size and brightness." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/82717929438421668882.
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Yu, Chang Ching, and 余長青. "Non-Performing Loans and Operational Efficiencies of Taiwanese Commercial Banks: An Application of the Output Translation Invariant DEA Model." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/az4tkh.
Full textAbstract:
碩士國立高雄大學
國際高階經營管理碩士在職專班(IEMBA)
102
Bank is an important financial intermediate institution nowadays, its operation performances close relates to the overall growth of economy. However, there is always an ex ante for a risk that loan becomes to be non-performing, which means loan might become an undesirable output so as to decrease the operation performance of banks (Chang, 1999; Li et al., 2009). Thus, non-performing loan influence heavily on economy’s financial soundness (Li et al., 2009), and individual banks must control its non-performing loan to maintain its performance (McNulty et al., 2001). Taking the non-performing loan as undesirable output, the purpose of this paper is to investigate its contribution to the performance of banks applying data envelopment analysis (DEA). In order to understand the structural difference of Taiwanese financial industry, we apply the nonparametric test and cluster the samples into four groups: financial holding banks vs. non-financial holding banks, old banks vs. new banks, state-owned banks vs. non-state-owned banks, and foreign domestic banks vs. non-foreign domestic banks. The empirical results suggest that the average performance of non-financial and financial holding banks reveal to be insignificant different; yet the old banks’ average performance is significant higher than which of new banks. On average, the performance of state-owned banks is higher than the performance of non-state-owned banks. Finally, although foreign domestic banks have higher average performance than non-foreign domestic banks, it reveals to be insignificant.