Linear Transformation

Top PDF Linear Transformation:

Rhotrix Linear Transformation

Rhotrix Linear Transformation

The method of converting a rhotrix to a special matrix called “coupled matrix” was suggested by [9]. This idea was used to solve systems of n n  and  n    1   n 1  matrix problems simultaneously. The concept of vectors and rhotrix vector spaces and their properties were in- troduced by [3] and [4] respectively. To the best of our knowledge, the concept of rank and linear transformation of rhotrix has not been studied. In this paper, we consider the rank of a rhotrix and characterize its properties. We also extend the idea to suggest the necessary and suffi- cient condition for representing rhotrix linear transforma- tion.
Show more

5 Read more

Metric and Kernel Learning Using a Linear Transformation

Metric and Kernel Learning Using a Linear Transformation

Most of the existing work in metric learning has been done in the Mahalanobis distance (or metric) learning paradigm, which has been found to be a sufficiently powerful class of metrics for a variety of data. In one of the earliest papers on metric learning, Xing et al. (2002) propose a semidefinite programming formulation under similarity and dissimilarity constraints for learning a Mahalanobis distance, but the resulting formulation is slow to optimize and has been outperformed by more recent methods. Weinberger et al. (2005) formulate the metric learning problem in a large margin setting, with a focus on k-NN classification. They also formulate the problem as a semidefinite programming problem and consequently solve it using a method that combines sub-gradient descent and alternating projections. Goldberger et al. (2004) proceed to learn a linear transformation in the fully supervised setting. Their formulation seeks to ‘collapse classes’ by constraining within-class distances to be zero while maximizing between-class distances. While each of these algorithms was shown to yield improved classification performance over the baseline metrics, their constraints do not generalize outside of their particular problem domains; in contrast, our approach allows arbitrary linear constraints on the Mahalanobis matrix. Furthermore, these algorithms all require eigenvalue decompositions or semi-definite programming, which is at least cubic in the dimensionality of the data.
Show more

29 Read more

Invariants of Surface Indicatrix in a Special Linear Transformation

Invariants of Surface Indicatrix in a Special Linear Transformation

Obtained results show that, Gauss curvature of the surface doesn’t change when special linear transformation in curvilinear coordinates is done. Linear transformation in curvilinear coordinates defines deformation bounded by the surface in Euclidean space. So, in this deformation Gauss curvature of the surface remains unchanged.

10 Read more

Redundancy of Moment Conditions for Linear Transformation of Parameters

Redundancy of Moment Conditions for Linear Transformation of Parameters

In this paper, we will extend their redundancy concept to estimation of an arbitrary linear transformation of an original parameter vector and derive the necessary and sufficient condition for an extra set of moment conditions to be redundant, given an initial set of moment conditions, for the efficient estimation of the linear transforma- tion of parameters. More specifically, the current paper makes three new contributions. Firstly, we extend the moment redundancy concept of [1] to estimation of an arbitrary linear transformation of original parameters. Secondly, the redundancy condition derived in the current paper unifies the full and partial redundancy condi- tions of [1]. As a result, our redundancy condition given in the theorem of Section 2 includes as two special cas- es the full and partial redundancy conditions of [1]. Lastly, we use a much simpler approach based on matrix ranks to deriving our main results instead of using “brute-force” matrix algebra, as adopted by [1] and [2].
Show more

6 Read more

Analysis of Image Retrieval Using Linear Transformation Techniques

Analysis of Image Retrieval Using Linear Transformation Techniques

Abstract- Every of us will have a large set of stored images such as scanned copies, multimedia files. Image retrieval is a process of finding similar images to that of query image or to find out to which database the query image belongs. Here we are using two linear transformation techniques Gabor-Walsh Wavelet pyramid technique and Curvelet transform 7method Feature vectors of each of the database images are extracted by applying these techniques, then by calculating Euclidian distance we find that to which database the query image belongs. The comparative analysis is done based on the FAR, FRR & TSR parameters. Index Terms- CBIR (content based image retrieval)FAR (False Acceptance Rate), FRR (False Rejection Rate), GWWP (Gabor Walsh & Wavelet Pyramid), TSR (True Success Rate).
Show more

5 Read more

Measuring Asymmetric Nature of Beta Using a Smooth Linear Transformation

Measuring Asymmetric Nature of Beta Using a Smooth Linear Transformation

The uniqueness of this study lies in its proposition of a smooth linear trans- formation function which is found to be yielding better result over that of the traditional binary classification of beta for capturing the asymmetry. The smooth transition measure would give less weight to unsystematic and noisy movements and thus, expected to capture long-run departures in a better way. This indicator not only captured the direction of the market return but also contained a meas- ure to capture the magnitude of the market return. It was observed from the study that the proposed method of market classification could capture the asymmetric characteristics of beta in a better way. In the study with 777 stocks, the asymmetric influence was significant in the case of 112 stocks, whereas the number was much lower when binary up and down classification was used in accordance with conventional procedures. Thus, our proposition of a smooth linear transformation function is proved to be yielding a superior result for cap- turing the asymmetry. Whether these asymmetries can be used for investment decisions, need further exploration.
Show more

14 Read more

A Generalized Linear Transformation Method for Simulating Meixner L´evy Processes

A Generalized Linear Transformation Method for Simulating Meixner L´evy Processes

The sophistication of the models and the complexity of the financial products also imply that only in rare cases there exists tractable pricing formulaes for these prod- ucts. In pricing most exotic derivative securities, we typ- ically resort to numerical methods such as the binomial models, finite difference methods, Monte Carlo (MC), or quasi-Monte Carlo (QMC) methods. In the past decade, QMC has become a popular tool in computational fi- nance. Early finance applications of QMC mainly fo- cus on the Black-Scholes type models; see [14]. More recently, this method has been extended to other more exotic models, particularly the L´ evy models (see [8], [19], [2], [16], [13]). Many numerical studies seem to suggest that the success of QMC is intricately related to the no- tion of effective dimension. Dimension reduction tech- niques such as the Brownian bridge construction ([17] and [4]), the principal component construction [1], and the linear transformation (LT) method [12] have been proposed to further enhance QMC.
Show more

6 Read more

Contrast Enhancement of HDR images using
          Linear Transformation and Kernel Padding

Contrast Enhancement of HDR images using Linear Transformation and Kernel Padding

Now depends on the transformation technique we need to apply such as linear or non-linear the image is enhanced. In linear transformation a slope of linear value is selected and all the pixels whose intensity value is close to this slope is considered otherwise the pixels whose intensity is less or greater than this linear slope needs to be adjusted. The proposed work consists of histogram equalizations, HDR images, linear transformation and kernel padding. They are described in the following.

6 Read more

Application of linear transformation in numerical calculation

Application of linear transformation in numerical calculation

The linear transformation is the most simple and the most basic transformation. Such as, the linear function is the most simple and the most basic function. The linear transformation is a main research object of linear algebra. This text uses a series of related knowledge of linear transformation thought in linear algebra, makes study and analysis finely to the position and application of the linear transformation thought in mathematics, and sieves several typical example.

9 Read more

On  the  Linear  Transformation  in  White-box  Cryptography

On the Linear Transformation in White-box Cryptography

Abstract. Linear transformations are applied to the white-box crypto- graphic implementation for the diffusion effect to prevent key-dependent intermediate values from being analyzed. However, it has been shown that there still exists a correlation before and after the linear transfor- mation, and thus this is not enough to protect the key against statistical analysis. So far, the Hamming weight of rows in the invertible matrix has been considered the main cause of the key leakage from the linear transformation. In this study, we present an in-depth analysis of the distribution of intermediate values and the characteristics of block in- vertible binary matrices. Our mathematical analysis and experimental results show that the balanced distribution of the key-dependent inter- mediate value is the main cause of the key leakage.
Show more

16 Read more

High speed Image Dehazing Method Based on Linear Transformation

High speed Image Dehazing Method Based on Linear Transformation

522 | P a g e scene atmospheric scattering coefficient and gets the scene albedo [7]. ia, Bolun used Convolutional Neural Networks (CNN) relying on feature extraction to estimate a medium transmission map and offering a nonlinear function called Bilateral Rectified Linear Unit (BReLU) to enhance the quality of a de-haze image. Then making connections between the proposed DehazeNet and existing model [8].

14 Read more

p q Analogue of a linear transformation preserving log convexity

p q Analogue of a linear transformation preserving log convexity

The objective of this paper is to show that the log-convexity is preserved under the p, q-binomial transformation using a theorem of Liu and Wang [11, Theorem 4.8], who established the connection between linear transformations preserving the log-convexity and the x-log-convexity. As an applica- tion, we give the log-convexity of the p-Galois numbers.

9 Read more

Determinants of Individual Investor Behaviour: An Orthogonal Linear Transformation Approach

Determinants of Individual Investor Behaviour: An Orthogonal Linear Transformation Approach

SUMMARY & CONCLUSION In the present paper, principal components analysis is carried out on the data collected from survey of sample individual investors, to extract the factors influenci[r]

31 Read more

Isomorphism of Groups of Operators on Hilbert Space

Isomorphism of Groups of Operators on Hilbert Space

Negative of a Linear Transformation :—Let E and E be any two linear spaces (over the field K).Let T:E→E be a linear transformation from E into E .Then the negative of T denoted by – T is defined by (-T)(u) = -[T(u)] for every u ∊ E and T(u) ∊ E . Since, T(u) ∊ E ⇒ -T(u) ∊ E .Thus, –T is also a function from E into E . Now, let α,β ∊ K and u,v ∊ E.

6 Read more

Classical and Quantum Behavior of Generalized Oscillators in Terms of Linear Canonical Transformations

Classical and Quantum Behavior of Generalized Oscillators in Terms of Linear Canonical Transformations

These various methods have been investigated for various purposes. However, there has been no unification of these various methods. The purpose of the present paper is to provide a unified description of these methods in terms of a linear transformation for position and momentum by referring to the system of a generalized oscillator. Since we are concerned with a linear canonical transformation, the classical and quantum correspondence is one-to-one. We also show that the invariant operator can be consi- dered as part of a linear canonical transformation.
Show more

14 Read more

PEB Based DWT with an Efficient Fixed Booth Multiplier

PEB Based DWT with an Efficient Fixed Booth Multiplier

The Discrete Wavelet Transform (DWT) is a linear transformation that operates on a data vector whose length is an integer power of two, transforming it into a numerically different vector of the same length. In this normal Fourier transform is performed as it captures both frequency and location information (location in time). Discrete Wavelet Transform (DWT) derived features used for digital image texture analysis. Wavelets appear to be a suitable tool for this task, because they allow analysis of images at various levels of resolution. The proposed features have been tasted on images from standard Brodatz catalogue. The discrete wavelet transform is a linear transformation that operates on a data vector whose length is an integer power of two, transforming it into a numerically different vector of the same length. It is a tool separates data into different frequency components, and then studies each component with resolution matched to its scale. The main feature of DWT is multi scale representation of function. By using the wavelet, given function can be analyzed at various levels of resolution. Signal transmission is based on transmission of a series of numbers. The series representation of a function is important in all types of signal transmission. The wavelet representation of a function is a new technique. Wavelet transform of a function is the improved version of Fourier transform. Fourier transform is a powerful tool for analysing the components of a stationary signal. But it is failed for analysing the non-stationary signal where as wavelet transform allows the components of a non-stationary signal to be analysed.
Show more

11 Read more

Left and Right Magnifying Elements in Generalized Semigroups of Transformations by Using Partitions of a Set

Left and Right Magnifying Elements in Generalized Semigroups of Transformations by Using Partitions of a Set

T (X, P ) is a subsemigroup of T (X) and if P = {X }, T (X, P ) = T (X ). Our aim in this paper is to give necessary and sufficient conditions for elements in T (X, P ) to be left or right magnifying. Moreover, we apply those conditions to give necessary and sufficient conditions for elements in some generalized linear transformation semigroups.

9 Read more

Learning Dynamic Generator Model by Alternating Back-Propagation through Time

Learning Dynamic Generator Model by Alternating Back-Propagation through Time

Given the high approximation capacity of the modern deep neural networks, it is natural to replace the linear struc- tures in the transition and emission models of (Doretto et al. 2003) by the neural networks. This leads to the follow- ing dynamic generator model that has the following two components. (1) The emission model, which is a generator network that maps the d-dimensional state vector to the D- dimensional image via a top-down deconvolution network. (2) The transition model, where the state vector of the next frame is obtained by a non-linear transformation of the state vector of the current frame as well as an independent Gaus- sian white noise vector that provides randomness in the tran- sition. The non-linear transformation can be parametrized by a feedforward neural network or multi-layer perceptron. In this model, the latent random vectors that generate the ob- served data are the independent Gaussian noise vectors, also called innovation vectors in (Doretto et al. 2003). The state vectors and the images can be deterministically computed from these noise vectors.
Show more

10 Read more

On the Ternary Quadratic Diophantine Equation 4x2 – 7xy2 + 4y2 + x+y+1=19z2 

On the Ternary Quadratic Diophantine Equation 4x2 – 7xy2 + 4y2 + x+y+1=19z2 

Diophantine Equation given by 4 represents a cone and is analyzed for its non-zero distinct integer solutions. A few interesting relations among the solutions and special polygonal and pyramided numbers are presented. On introducing the linear transformation x=u+v, y=u-v and employing the method of factorization, different patterns of non-zero distinct integer solutions to the above equation are obtained.

5 Read more

Show all 10000 documents...