Global ETD Search
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 225 for “"Cosine"”.
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Partial Cosine-Funk Transforms at Poles of the Cosine-λ Transform on Grassmann Manifolds
<p>The cosine-λ transform, denoted C<sup>λ</sup>, is a family of integral transforms we can define on the sphere and on the Grassmannian manifolds of p-dimensional subspaces in K<sup>n</sup> where K is R, C or the skew field H of quaternions. We treat the Grassmannians as the symmetric spaces …
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Some Theorems on the Cosine(pi-Lambda) Inequality
Made available in DSpace on 2014-12-11T18:23:33Z (GMT). No. of bitstreams: 1 7105165.pdf: 2427111 bytes, checksum: 6eea7c21135e9a83643d2a013b5bcfa5 (MD5) Previous issue date: 1970
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A reconfigurable root raised cosine filter for a mobile receiver
Over the last decade, the growth of second generation (2G) digital communications has been explosive. Now wireless communications is evolving to third generation (3G),where it will offer wideband data services and multimedia wideband products and services such as video conferencing and high speed …
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Character extraction from ancient Chinese stele using discrete cosine transform
<p>"The discrete cosine transform (DCT) was applied to locate Chinese characters in ink rubbings of ancient Chinese steles (stone slabs with inscribed characters) in order to extract the characters by creating a bounding box in the image reconstructed by the inverse DCT. This work is a …
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A Combinatorial Tweet Clustering Methodology Utilizing Inter and Intra Cosine Similarity
… clusters by utilizing inter and intra cluster cosine similarity. Cosine similarity is the degree of relativity between two vectors. This thesis proposes a “Combinatorial Hierarchical Clustering Methodology” as a combination of both agglomerative (Bottom-Up) and divisive (Top-Down) hierarchical …
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Hardware implementation of a low-power two-dimensional discrete cosine transform
… low-power dedicated, two-dimensional, Discrete Cosine Transform (DCT) core meeting all IBM Softcore requirements is developed. Power is optimized completely at the algorithmic, architectural, and logic levels. The architecture uses row-column decomposition of a fast 1-D algorithm implemented …
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A comparison of discrete cosine transform and discrete wavelet transform algorithm in watermarking against common attacks
… no comparison documented done between Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT). In this report, the DCT watermarking algorithms and DWT watermarking algorithms were compared based on robustness and imperceptibility criteria. With DCT, the watermark bits were embedded …
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Design and analysis of Discrete Cosine Transform-based watermarking algorithms for digital images. Development and evaluation of blind Discrete Cosine Transform-based watermarking algorithms for copyright protection of digital images using handwritten signatures and mobile phone numbers.
… the development and evaluation of blind discrete cosine transform-based watermarking algorithms for copyright protection of digital still images using handwritten signatures and mobile phone numbers. The new algorithms take into account the perceptual capacity of each low frequency coefficients …
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Design and analysis of Discrete Cosine Transform-based watermarking algorithms for digital images. Development and evaluation of blind Discrete Cosine Transform-based watermarking algorithms for copyright protection of digital images using handwritten signatures and mobile phone numbers
… the development and evaluation of blind discrete cosine transform-based watermarking algorithms for copyright protection of digital still images using handwritten signatures and mobile phone numbers. The new algorithms take into account the perceptual capacity of each low frequency coefficients …
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Numerical Simulation of Three-Dimensional Aerodynamic Behavior of a Yawed, Inclined Circular Cylinder
… of Cy deviates from the prediction by the Cosine Rule. The dominant frequency of Cx has a relatively low-frequency component and increases with yaw angle, but it cannot be predicted by the Cosine Rule. The comparison results indicate that the three-dimensional characteristics of the forces …
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Propostas de atividades de estudo e pesquisa para o estudo das funções trigonométricas seno e cosseno no âmbito de um curso de Licenciatura em Matemática
… to enhance the learning process of the Sine and Cosine Trigonometric Functions. Thus, it was achieved through the validation of a Proposal for an Alternative Didactic Model and in the discussion and use of mathematical organizations planned for these activities, in addition to the emergence of …
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Fast implementation of integer transforms in H.264/AVC video encoders
The Integer Discrete Cosine Transform (IDCT) and Hadamard transforms are adopted in the H.264/AVC standard encoder for the compression of residual video signals. Other video standards such as the H.261, H.262 and H.263 use Discrete Cosine Transform (DCT).
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An exact analysis of two-dimensional radiative transfer in an absorbing and emitting gray medium
… the following types of boundary conditions: (1) cosine varying diffuse, (2) cosine varying collimated, (3) constant temperature strip, and (4) the strip illuminated by a uniform collimated flux. The solutions for the physically unrealistic cosine varying models are used to construct the solutions …
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Bayesian distance metric learning on i-vector for speaker verification
… different-speaker data pairs with the highest cosine scores to form a different-speaker constraint set. This set captures the most discriminative between-speaker variability that exists in the training data. This system is evaluated on the female part of the 2008 NIST SRE dataset. Cosine …
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Finite element analysis of periodic shells and origami tessellations
… solver: the Smooth "Eggbox, Rigid "Eggbox", and "Cosine Zigzag" patterns. The solver calculated in-plane and out-of-plane Poisson's ratios for each tessellation, matching up with previously observed or theoretical values with a low relative error. Cavities were imposed onto the three tessellation …
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A material segmentation and classification system
… of each region is then based on the cosine lobe model. The cosine lobe model is our adopted reflectance model, which allows for a simple approximation of a material's reflectance properties, which then serves as the material's unique signature.
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DATA COMPRESSION BY USING SYMMETRICAL COMPONENT TRANSFORM
… These results are compared with the discrete cosine transform, the best known amongst all unitary transforms. The results show that for typical scenes the discrete cosine transform has better data compression capabilities than the symmetrical component transform, but the symmetrical component …
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Two dimensional COS method for pricing early-exercise and discrete barrier options under the Heston Model
… the 2D-COS method, which makes use of Fourier-cosine expansions in each of the two dimensions in order to approximate the integrals. Using the fast Fourier transform, we are able to efficiently calculate the cosine series coefficients at each exercise/observation date. A construction of this …
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SVMAUD: Using textual information to predict the audience level of written works using support vector machines
… inputs, machine learning methods, including cosine, Naive Bayes, and Support Vector Machines (SVM), can suggest the grade level of an essay based on the vocabulary chosen by the author. The audience level prediction and essay grading problems share the same inputs, expert-labeled documents, …
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