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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 487 for “"Invariance"”.
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Structural invariance and symmetry
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Linguistics and Philosophy, 1984.
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Deformation invariance of rational pairs
Rational pairs, recently introduced by Kollár and Kovács, generalize rational singularities to pairs (X,D). Here X is a normal variety and D is a reduced divisor on X. Integral to the definition of a rational pair is the notion of a thrifty resolution, also defined by Kollár and Kovács, and in …
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Invariance Theory and Sequential Estimation
Made available in DSpace on 2014-12-09T22:17:48Z (GMT). No. of bitstreams: 1 6901461.pdf: 1986298 bytes, checksum: 23c1292df5f17e1b7ce0d6c69632e8eb (MD5) Previous issue date: 1968
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Constraints and invariance in target detection
The concept of invariance in hypothesis testing is discussed for purposes of target detection. Invariant tests are proposed and analysed in two contexts. The first involves the use of cyclic permutation invariance as a solution to detecting targets with unknown location in noise. An invariance …
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Comparing Distributions: Invariance Principles & Mismatched Guesswork
… over a finite alphabet. The first is an invariance principle which gives a quantitative bound on the expected difference between general functions of two finite sequences of random variables. This result is one way to generalize the foundational basic invariance principle to a particular …
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Lattice gas hydrodynamics with Galilean invariance
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1988.
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Modular invariance for vertex operator superalgebras
We generalize Zhu's theorem on modular invariance of characters of vertex operator algebras (VOAs) to the setting of vertex operator superalgebras (VOSAs) with rational, rather than integer, conformal weights. To recover SL₂ (Z)-invariance, it turns out to be necessary to consider characters of …
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Evaluating Equivalence Testing Methods for Measurement Invariance
Establishing measurement invariance (MI) is important to validly make group comparisons on psychological constructs of interest. MI involves a multi-stage process of determining whether the factor structure and model parameters are similar across multiple groups. The statistical methods used by …
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View-Invariance in Visual Human Motion Analysis
… in the past, the important issue of viewpoint invariance in the representation and recognition of poses and actions has received relatively scarce attention, and forms a key goal of this thesis. Drawing on results from 2D projective invariance theory and 3D mutual invariants, we present three …
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Invariance of Knot Lattice Homology and Homotopy
<p>Links of singularity and generalized algebraic links are ways of constructing three-manifolds and smooth links inside them from potentially singular complex algebraic surfaces and complex curves inside them. We prove that knot lattice homology is an invariant of the smooth knot type of a …
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Violations of Cp Invariance in Weak Interactions
Made available in DSpace on 2015-05-12T21:41:43Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6801865.PDF: 2000141 bytes, checksum: c57bed1e997b6154d5e74b2a6bf28ad5 (MD5) Previous issue date: 1967
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Violation of CP invariance in weak interactions
… depends on the violation of space-reflection invariance and of time-reversal invariance, is also calculated. It is found that in this theory the selection rule Delta S [not equal] +/- 2 has as a consequence the Gell-Mann-Okubo mass formulas and the FID ratios for both the axial vector current …
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Hierarchy and invariance in auditory cortical computation
… cortical hierarchy, probing for one candidate: invariance to realworld background noise. To measure invariance, we correlate voxel responses to natural sounds with and without real-world background noise. Non-primary responses are substantially more noise-invariant than primary responses. These …
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The invariance hypothesis and the ventral stream
The invariance hypothesis is the claim that properties of the ventral stream can be deduced from 1. a consideration of the computational problem with which it is engaged: invariant object recognition, 2. constraints of the neural "hardare", and 3. the visual environment. We are interested here in a …
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Invariance Properties of Statistical Tests for Dependent Observations
… an arbitrary covariance structure. These include invariance properties of the distributions of quadratic forms in MANOVA problems and one- and two-sample Hotelling's T<sup>2</sup> statistics. As preliminaries to the multivariate results, we obtain a very general version of the Cochran's theorem …
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An Investigation of Semantic Invariance in Human Speech
<p>The present investigation addresses the hypothesis of phonetic symbolism in human speech. As a psycholinguistic and epistemological concept, the phonetic symbol is understood to be a structural a priori in sound which correlates with the semantic properties of physiognomic, muscular tension. An …
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Nature Images and Fractal Scale-Invariance upon Prosociality
… of environmental scenes) prompted by scale invariance (i.e., the extent to which stimuli repeat their own lower-level structure) has been previously demonstrated to relate to perception of natural beauty, which mediates certain effects of nature experience. Scale invariance is posited as a …
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Lie Group Invariance Properties of Radiation Hydrodynamics Equations
Made available in DSpace on 2017-07-06T18:38:03Z (GMT). No. of bitstreams: 3 Coggeshall_Stephen_V_PhD.pdf: 98937878 bytes, checksum: 222756a87e39c2005bab2bbf099508f3 (MD5) Coggeshall_Stephen_V_PhD_ABS.pdf: 451972 bytes, checksum: 4c84d2c1e0b39722d200ae1164d25b0a (MD5) license.txt: 4813 bytes, …
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Rigidity and invariance properties of certain geometric frameworks
Given a degenerate (n + 1)-simplex in a n-dimensional Euclidean space Rn, which is embedded in a (n + 1)-dimensional Euclidean space Rn+l. We allow all its vertices to have continuous motion in the space, either in Rn+l or restricted in Rn. For a given k, based on certain rules, we separate all its …
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