····· lezzter Preis 71.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Over the last century, the investigations in Gravitation and Cosmology have attracted the attention of thousand of human minds. Apart this boom in popularity, the homework task for cosmologists is to try to give an answer to the reasons why the present Universe has the properties that are observed. In spite of having a well-established theoretical framework like the Einstein`s gravity theory (GR), which is valid in an amplest rank of energies and that has responded satisfactorily to numerous empirical verifications, are numerous unanswered intriguing questions. Is the dark energy the cause of the acceleration of the expansion What is its equation of state nowadays Why the energy densities of matter and dark energy of the same order of magnitude nowadays Will be the acceleration of the expansion an indication that the action of Einstein-Hilbert must be modified Can be reached the isotropic degree of the universe that is observed today, independently of the initial degree of anisotropy In this book are studied, from the perspective of the dynamical systems, several Universe models that try to give answers to some of these questions. ····· 1036198409
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this study, we discussed the functionality of transportation problem and regular simplex method then compared their run-time and optimized values with non-linear method called the Lagrange multiplier method. Lagrange multiplier is an algorithm that uses different mechanisms to choose the best optimal solutions. This method based on transforming the linear structure transportation problem into the nonlinear structure and solved it directly, by the techniques.We concluded that the computational results with a Lagrange method are better, easier and shorter than those with a specialized simplex method for large problems. ····· 1036198330
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The purpose of the present work is to introduce and investigate a new class of sets called (i, j)-Ps open sets, and use this class to define and study new concepts in bitopological spaces such as continuity and separation axioms. At the beginning of this work, we define the class of (i, j)-Ps open sets which contained in the class of j-preopen sets and also contained in the class of (i, j)-gp open sets. It is shown that the family of (i, j)-Ps open sets form a supratopology on X. We prove that the family of (i, j)-Ps open sets and the family of j-preopen sets are identical when (X, i) are semi-T1-spaces. Finally, some separation axioms such as T0, T1 and T2 spaces are defined in bitopological spaces, also R0, R1 and Urysohn spaces are defined and the relation between them are found by using the new type of graph functions called (i, j)-Ps closed graph. It is noticed that if (X, 1, 2) is (i, j)-Ps Tk, then it is (i, j)-Ps Tk-1, for k=1, 2. It is proved that a bitopological space (X, 1, 2) is (i, j)-Ps T1 if the (i, j)-Ps derived set of every point of X is empty. ····· 1036198297
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Teachers have mostly been blamed for pupils failure in public examinations. Failure in examinations may be a result of pupils experiencing difficulties in learning the subject. The purpose of this study was to elicit teachers and students, perceptions of the causes of pupils learning difficulties in mathematics in the secondary school. The study was conducted with both secondary and primary teachers and students in Masvingo urban and peri-urban schools. Results were compared to find out whether primary and secondary teachers held the same perceptions, and whether pupils had similar perceptions as their teachers. The study revealed that both primary and secondary teachers and their pupils perceived the type of curriculum, the availability of resources, and the type of administration in the school as contributing to the difficulties that may be encountered by pupils in learning mathematics at both primary and secondary levels There was no evidence to link the cause of learning difficulties to the child, the teacher, or the environment. A lot of schools have inadequate basic resources for learning, a situation that is impacting negatively on learning mathematics. ····· 1036198291
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Due to global economic crisis optimization and social welfare become an essential part of the economy and business. Every firm wants output maximization, cost minimization, utility maximization and social welfare. In this book an attempt has been made to maximize an output subject to a budget constraint to maximize utility function subject to multiple constraint and minimization of cost in three variables subject to output function as a constraint, studying the behavior of the firm. It deals with formulating mathematical model for the problem, considering Cobb-Douglas production function in three variables (factors: capital, labor, and other inputs). Considering an explicit form of production function, necessary conditions are applied to the optimization problem, and have been tried to find stationary points as well as optimal value of the production function. In this book Arrow s impossibility theorem, its combinatorial and geometrical interpretation is given more clearly. Social welfare works of Amartya K. Sen are described with easier mathematical calculations. ····· 1036198260
····· lezzter Preis 22.90€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is part of the TREDITION CLASSICS series. The creators of this series are united by passion for literature and driven by the intention of making all public domain books available in printed format again - worldwide. At tredition we believe that a great book never goes out of style. Several mostly non-profit literature projects provide content to tredition. To support their good work, tredition donates a portion of the proceeds from each sold copy. As a reader of a TREDITION CLASSICS book, you support our mission to save many of the amazing works of world literature from oblivion. ····· 1036196000
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this book, we propose novel deterministic RNN training algorithms that adopt a nonmonotone approach. This allows learning behaviour to deteriorate in some iterations nevertheless the overall learning performance is improved over time. The nonmonotone RNN training methods, which take their theoretical basis from the theory of deterministic nonlinear optimisation, aim at better exploring the search space and enhancing the convergence behaviour of gradient-based methods. They generate nonmonotone behaviour by incorporating conditions that employ forcing functions, which are used to measure the sufficiency of error reduction, and an adaptive window, whose size is informed by estimating the morphology of the error surface locally. The thesis develops nonmonotone 1st- and 2nd-order methods and discusses their convergence properties. The proposed algorithms are applied to training RNNs of various sizes and architectures, namely Feed-Forward Time-Delay networks, Elman Networks and Nonlinear Autoregressive Networks with Exogenous Inputs Networks, in symbolic sequence processing problems. Numerical results show that the proposed nonmonotone learning algorithms train more effectively. ····· 1036192621
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This research paper exhibits different methods in estimating poverty incidence in the barangay level. It focused on using the multiple linear, Poisson, and the negative binomial regression models. Estimates obtained were ranked according to barangays with highest poverty incidence. The data that was used was the 2009 CBMS Marinduque data, this was the latest and complete data of Marinduque from the Community-Based Monitoring System. Significant correlates were obtained by using the chi-square test of independence and showed that the use of solar electricity, electric battery, and other sources of energy is not significant thus removed from the data. To ensure that multicollinearity would not be present in the data, the Principal Component Analysis was used to reduce the predictor variables. Both the original significant predictor variables and the reduced variables were used to model the data for comparison. Among all the models acquired, multiple linear and negative binomial with parameter equal to one regression models were used to compare with the actual poverty proportions. Poisson regression model was not used for the goodness-of-fit test showed that the model is overdispersed ····· 1036192575
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this book we discuss the behaviour of direct sum decomposition in additive categories and in particular in categories of modules. In the first part, we investigate the ring theoretical properties that play a main role in the theory of factorization in additive categories, like the exchange property, semilocality and Goldie dimension. We stress the importance of the latter and we investigate with care the infinite case of the dual Goldie dimension of rings. In the rest of the book, we use a more categorical approach, studying the behaviour of direct sum decomposition in additive categories. We study classes of categories where the direct sum decomposition behaves regularly, underlining the role played by semilocal endomorphism rings. We analyze the peculiar behaviour of direct sum decomposition in some categories of modules, where the uniqueness of the decomposition is obtained up to two permutations, and we notice how this phenomenon is due to the presence of endomorphism rings of type two. In the last chapter we investigate what happens when we pass from finite direct sum of indecomposable objects to infinite direct sums both at a categorical and a monoid theoretical level. ····· 1036192566
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book deals with Wavelet Multifractal Analysis of Functions especially those representing some type of self similarity. These constitute nowadays a very popular subject of study in theoretical mathematics, physics as well as applied fields such as biology, finance, etc. This makes their understanding is of great interest for researchers as well as professionals. This book will be an important reference especially for young researchers as well as for applied ones especially physicists, biologists, bankers, and financials. We recall with details the mathematics notions related to the subject such as Hausdorff measure and dimension, self similar sets and the role of the self similarity in the computation of their sizes. Next, we recall the basics of wavelet theory, self similar type functions and the validity of the multifractal formalism and its relation to the self similar structure. Some examples are also recalled with exact computations. ····· 1036192393
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Anti-Jordan pairs were introduced by Faulkner and Ferrar. Faulkner and Ferrar classified the finite dimensional simple anti-Jordan pairs over an algebraically closed field F of characteristic zero, using methods from Lie superalgebra theory in 1980. First We describe the automorphism groups and involutions of the rectangular matrix pair, the symmetric-skew pair and the symplectic anti-Jordan pair. Then we use this to classify finite dimensional simple anti-Jordan triple systems over an algebraically closed field of characteristic zero,because anti-Jordan triple systems are isomorphic to anti-Jordan pairs with involution. ····· 1036192342
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Current research in the field of limit analysis is focussing on the development of numerical tools which are sufficiently efficient and robust to be used in engineering practice. This places demands on the numerical discretisation strategy adopted as well as on the mathematical programming tools applied, which are the key ingredients of a typical computational limit analysis procedure. In this research, the Element-Free Galerkin (EFG) discretisation strategy is used to approximate the displacement and moment fields in plate and slab problems, and second-order cone programming (SOCP) is used to solve the resulting discretised formulations. A numerical procedure using the EFG method and second-order cone programming for the kinematic limit analysis problem was developed first. The moving least squares technique was used in combination with a stabilised conforming nodal integration scheme, both to keep the size of the optimisation problem small and to provide stable and accurate solutions. The formulation was expressed as a problem of minimizing a sum of Euclidean norms, which was then transformed into a form suitable for solution using SOCP. ····· 1036192309
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The understanding of the asymptotic behaviour of dynamical systems is one of the most important problems of modern mathematical physics. One way to treat this problem for systems having some dissipativity properties is to analyze the existence and structure of its global attractor. On some occasions, some phenomena are modelled by nonlinear evolutionary equations which do not take into account all the relevant information of the real systems. Instead some neglected quantities can be modelled as an external force which in general becomes time-dependent. For this reason, non-autonomous systems are of great importance and interest. Several models of reaction-diffusion equations in bounded and unbounded domains are analyzed in this book. Using the pullback theory so much for single-valued as for multi-valued non-autonomous dynamical systems, since this allows for more generality in the non-autonomous terms, the existence of pullback attractors for our models of reaction-diffusion equations is proved in this book. ····· 1036192238
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Efficiency evaluation is an important part of decision making in many areas particularly in management and manufacturing sectors. Uncertainty and fuzziness of the real world problems have increased utilization of fuzzy sets theory in many research areas and data envelopment analysis is one of them. Utilizing data envelopment analysis to evaluate efficiency scores of decision making units in fuzzy environment requires fuzzy models and mathematical methods for solving fuzzy models with minimum calculation and maximum precision. This book provides latest theoretical developments in fuzzy DEA and can be considered as a basic reference for new researchers in fuzzy DEA. ····· 1036192206
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Differential equations are encountered in various fields such as physics, chemistry, biology, mathematics and engineering. Most nonlinear models of real-life problems are still very difficult to solve either numerically or theoretically. Many unrealistic assumptions have to be made to make nonlinear models solvable. There has recently been much attention devoted to the search for better and more efficient solution methods for determining a solution, approximate or exact, analytical or numerical, to nonlinear models. Finding exact/approximate solutions of these nonlinear equations are interesting and important. One of these methods is variational iteration method (VIM), which has been proposed by Ji-Huan He in 1997 based on the general Lagrange s multiplier method. The main feature of the method is that the solution of the linearized problem is used as the initial approximation for the linear and nonlinear problems. Then a more highly precise approximation at some special point can be obtained. This approximation converges rapidly to an accurate solution. VIM is very powerful and efficient in finding analytical as well as numerical solutions for a wide class of differential equation ····· 1036191984
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The initiation of the study of generalized closed set was done by N Levine in 1970 . Later on N Palaniappan introduced the concept of Regular Generalized closed set in 1993.Lots of work has been done by many Researchers in National and International level in this field . Some of my papers are also published in various Journals . The main objectives of the proposed book are to generalize the concept of regular open sets. To construct some stronger and weaker forms of generalized regular open sets . Also the concepts of regular dense sets and regular rare sets are introduced.To study the topological space formed by the collection of the above sets .To study the relationship between the various sets obtained above and also between the corresponding topological space. To study some new separation axioms which may help much in dealing with digital topology.Lastly the application of the above sets and the topological spaces are shown.This book may help a lot to the Researchers working in the field of ordinary Topology and fuzzy topology. Not only the Researchers but this book may also help the P.G students of Various Universities having Topology or Fuzzy Topology as Special paper. ····· 1036191980
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The original motivation for finding expander families was to build economical robust networks for telephone and computer communication. Over the past three decades, expander families have been developed into a powerful tool with wide applications in many areas such as fast distributed routing algorithms, storage schemes, telecommunication, and cryptography. This thesis focuses on the theoretical aspects of expander families. The primary goal is to apply spectral graph theory to show the non-existence of an expander family within the class of circulant graphs. There are other proofs out there, but this is a fundamental approach. Another part of this thesis uses the adjacency matrix and its properties to prove Cheeger`s inequalities and determine when the equalities hold. ····· 1036191956
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this monograph, we study graph-index, Watatani`s extended Jones index, and the relations between them. From this investigation, we realize that graph-index of graphs and Jones index of von Neumann algebras generated by `graph groupoids` are equivalent in a certain sense, whenver given graphs are finite trees. We provides the classification of graph-groupoid von Neumann algebras induced by finite trees with respect to these equivalent indexes. By understanding the indexings as morphisms, we establish actions of morphisms and construct the corresponding algebraic structure, called the `index semigroup.` We study the fundamental properties of them. As application, we consider the connection between our index semigroup and K-groups of finite-tree-groupoid von Neumann algebras. ····· 1036191940
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book deals with the techniques to solve elliptic eigenvalue problems on polygonal domains using least squares methods. It provides an in-depth treatment of an exponentially accurate nonconforming h-p spectral element method. The spectral element functions are nonconforming and a correction is made to the approximate solution so that the corrected solution is conforming. In this book we discuss the method separately when the boundary of underlying domain is smooth and also when the boundary contains corners. We present error estimates for the eigenvalues and eigenvectors and show that the error in the numerical solution is exponentially small. Theoretical results presented in the book are equally well suited for multiple or clustered eigenvalues. ····· 1036191914
für 64.71€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book deals with Thermoelastic behavior of various metal structures of different geometry which includes rectangular, circular, spherical and hollow cylindrical,thin annular shapes. By application of various mathematical tools the thermal stresses ,thermal strain and thermal displacements for these structures have been discussed. Both the Direct problems and the Inverse problems of Thermoelasticity are described in this book. The data and the mathematical approach in this book will be helpful from the design point of view of heavy machinery and large engineering structures.The topics discussed here may be helpful in manufacturing materials with large stress bearing abilities. ····· 1036191872
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this thesis an attempt is made to study the effects of magnetic field on some flows in channels and past infinite plates. In chapter 1 the effect of small uniform magnetic field on separation of a binary mixture for the case of fully developed natural convection of a fluid between two heated inclined plates is investigated.In chapter 2 free and forced convection flow of viscous incompressible fluid in a horizontal wavy channel has been studied. In chapter 3 Hall current effects on unsteady flow of viscous, incompressible fluid between two horizontal parallel non conducting plates, are studied. In chapter 4 the free and forced convection flow of conducting fluid between two parallel flat plates in an inclined channel is studied. In chapter 5 the effects of magnetic field, Heat generation and homogeneous chemical reaction on unsteady free convection and mass transfer flow of viscous conducting fluid past an infinite vertical porous plate is studied. ····· 1036191794
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The hydrodynamic instability arising under the form of a precession flow, named the vortex rope, creates high-pressure unsteady fluctuations on the walls of the draft tube of a Francis hydropower turbine, leading to a poor performance of the turbine including fatigue damage. Modeling of the phenomena and the numerical investigation of the hydrodynamic instability of this swirling system were tasks that have been assessed in this book. As an alternative to classical methods, the present book proposes a new approach of the analysis of the swirling flows based on a recently mathematical method of spectral collocation with orthogonal decomposition. The mathematical model presented in this book can recover the information in the prediction of the turbine characteristics without computing the full three-dimensional unsteady flow. As a result, this book provides valuable tools for assessing the turbine behavior at off-design operating regimes in the early stages of runner design. Mathematical instruments offered in this book give a transferable knowledge in approaching interdisciplinary problems that occur in modern science, which can be applied to a number of different disciplines. ····· 1036191788
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Chaos is the idea that a system will produce very different long-term behaviors when the initial conditions are perturbed only slightly. Chaos is used for some novel, time- or energy-critical interdisciplinary application. Examples include high-performance circuits and devices, liquid mixing, chemical reactions, biological systems, crisis management, secure information processing, and critical decision-making in politics, economics, as well as military applications, etc. This book presents the latest investigations in the theory of chaotic systems and its real applications in diverse disciplines such as economy, social sciences and mechanics. The papers, written by many of the leading experts in the field, cover both the experimental and theoretical aspects of the subject arising in the study of both discrete and continuous-time chaotic dynamical systems. This book presents the state-of-the-art of the more advanced studies of chaotic dynamical systems. Readership: Undergraduates and graduate students in natural and human sciences and engineering, and other areas of potential applications, mathematicians and researchers in nonlinear dynamical systems. ····· 1036191674
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is highly recommended for students in high schools and those studying privately for other entrance examination to the universities. It is suitable as a preparatory course book for those who wish to engage in self-study through distance learning programmes in the universities and other tertiary educational institutions.The book begins with an introductory work on arithmetic that includes the number line, fractions, approximations, etc. This is followed by chapters which cover extensively the syllables of major examinations such as the GCE O`Level and the WASSE examinations. ····· 1036191664· 1 · ::::: · 11 ·· 12 ·· 13 ·· 14 ·· 15 ·· 16 ·· 17 · ::::: · 29 ·
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