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Articles 5461 - 5490 of 7997
Full-Text Articles in Physical Sciences and Mathematics
Analysis Of The Quasi-Nonlocal Approximation Of Linear And Circular Chains In The Plane, Pavel Bělík, Mitchell Luskin
Analysis Of The Quasi-Nonlocal Approximation Of Linear And Circular Chains In The Plane, Pavel Bělík, Mitchell Luskin
Faculty Authored Articles
We give an analysis of the stability and displacement error for linear and circular atomistic chains in the plane when the atomistic energy is approximated by the Cauchy-Born continuum energy and by the quasi-nonlocal atomistic-to-continuum coupling energy. We consider atomistic energies that include Lennard-Jones type nearest neighbor and next nearest neighbor pair-potential interactions. Previous analyses for linear chains have shown that the Cauchy-Born and quasi-nonlocal approximations reproduce (up to the order of the lattice spacing) the atomistic lattice stability for perturbations that are constrained to the line of the chain. However, we show that the Cauchy-Born and quasi-nonlocal approximations give …
Dea With A Perfect Object: Analytical Solutions, Alexander Vaninsky
Dea With A Perfect Object: Analytical Solutions, Alexander Vaninsky
Publications and Research
For the main DEA models, adding a Perfect Object—that is, a virtual object that has the smallest inputs and greatest outputs—to a collection of actual objects permits obtaining solutions analytically. The paper derives formulas for the solutions and demonstrates that computations with them comprise simple operations with ratios of inputs and outputs while avoiding the use of linear programming (LP) algorithms. A numerical example illustrates the utility of the approach.
Error Control Of Iterative Linear Solvers For Integrated Groundwater Models, Matthew Dixon, Z Bai, C F. Brush, F I. Chung, E C. Dogrul, T M. Kadir
Error Control Of Iterative Linear Solvers For Integrated Groundwater Models, Matthew Dixon, Z Bai, C F. Brush, F I. Chung, E C. Dogrul, T M. Kadir
Business Analytics and Information Systems
An open problem that arises when using modern iterative linear solvers, such as the preconditioned conjugate gradient method or Generalized Minimum RESidual (GMRES) method, is how to choose the residual tolerance in the linear solver to be consistent with the tolerance on the solution error. This problem is especially acute for integrated groundwater models, which are implicitly coupled to another model, such as surface water models, and resolve both multiple scales of flow and temporal interaction terms, giving rise to linear systems with variable scaling. This article uses the theory of “forward error bound estimation” to explain the correspondence between …
Seasonal Variability And Dynamics Of Mesospheric Gravity Waves Over The Andes, Neal R. Criddle, M. J. Taylor, P.-D. Pautet, Y. Zhao
Seasonal Variability And Dynamics Of Mesospheric Gravity Waves Over The Andes, Neal R. Criddle, M. J. Taylor, P.-D. Pautet, Y. Zhao
Neal R Criddle
The ALO is a new facility developed for atmospheric research, located at the foot of the Andes mountain range in Cerro Pachon, Chile (30.2°S, 70.7°W). As part of a collaborative program, Utah State has a Mesospheric Temperature Mapper (MTM) on site, which is used to study short period gravity wave dynamics and temperature variations in the mesosphere-lower thermosphere region. The MTM began taking measurements of the OH(6,2) and O2(0,1) spectral bands in August 2009 and a complete profile of seasonal variation in gravity wave characteristics has been created for August 2009 through August 2010 using the OH(6,2) Band. The primary …
Essays On Hedge Fund Replication: Methodological Assessment And Development Of The Factor Approach, Nonlinear Modeling And Policy Perspectives, Guillaume Weisang
Essays On Hedge Fund Replication: Methodological Assessment And Development Of The Factor Approach, Nonlinear Modeling And Policy Perspectives, Guillaume Weisang
2011
This dissertation is concerned with hedge fund replication, a subject of a practical and theoretical importance, both from an investment and a risk management point of view. One of our goals is to extend known methodologies in order to enhance our understanding of an industry that is known for its secrecy and its lack of transparency. A second goal is to contribute to the quantitative finance literature with improved techniques for hedge fund replication. Hedge fund replication (HFR) is approached from the methodological as well as from practical and regulatory perspectives. The first two chapters provide the motivation and the …
Cooper’S Hawk Nest Site Characteristics In The Pineywoods Region, Richard R. Schaefer, D. Craig Rudolph, Josh B. Pierce, Jesse F. Fagan
Cooper’S Hawk Nest Site Characteristics In The Pineywoods Region, Richard R. Schaefer, D. Craig Rudolph, Josh B. Pierce, Jesse F. Fagan
Faculty Publications
Early accounts describe the Cooper’s Hawk (Accipiter cooperi) as a species in decline in much of North America during the early twentieth century (Bent 1937), particularly when in close proximity to humans (Eaton 1914). This decreasing population trend continued to be recognized later in the century in both Texas (Oberholser 1974) and Louisiana (Lowery 1974). Shooting and trapping during the first half of the 1900s, and pesticide use (especially DDT) after World War II are suggested as primary causes of the decline (Henny and Wight 1972, Bednarz et al. 1990). The Migratory Bird Treaty Act of 1972 and the ban …
Tangential Extremal Principles For Finite And Infinite Systems Of Sets, I: Basic Theory, Boris S. Mordukhovich, Hung M. Phan
Tangential Extremal Principles For Finite And Infinite Systems Of Sets, I: Basic Theory, Boris S. Mordukhovich, Hung M. Phan
Mathematics Research Reports
In this paper we develop new extremal principles in variational analysis that deal with finite and infinite systems of convex and nonconvex sets. The results obtained, unified under the name of tangential extremal principles, combine primal and dual approaches to the study of variational systems being in fact first extremal principles applied to infinite systems of sets. The first part of the paper concerns the basic theory of tangential extremal principles while the second part presents applications to problems of semi-infinite programming and multiobjective optimization.
An Improvement In Centroid Point Method For Ranking Of Fuzzy Numbers, Saeid Abbasbandy, T. Hajjari
An Improvement In Centroid Point Method For Ranking Of Fuzzy Numbers, Saeid Abbasbandy, T. Hajjari
Saeid Abbasbandy
In many applications, ranking of fuzzy numbers is an important component of the decision process. Many authors have investigated the use of fuzzy sets in ranking alternatives and they have studied different methods of raking fuzzy sets. Particularly, the ranking of fuzzy numbers. In a paper by Cheng [A new approach for ranking fuzzy numbers by distance method, Fuzzy Sets and Systems 95 (1998) 307-317], a centroid-based distance method was suggested for ranking fuzzy numbers, both normal and non-normal. The method utilizes the Euclidean distances from the origin to the centroid point of each fuzzy numbers to compare and rank …
Solution Of Fully Fuzzy Linear Systems By St Method, M. Mosleh, M. Otadi, Saeid Abbasbandy
Solution Of Fully Fuzzy Linear Systems By St Method, M. Mosleh, M. Otadi, Saeid Abbasbandy
Saeid Abbasbandy
In this paper, we investigate the existence of a positive solution of fully fuzzy linear equation systems where fuzzy coefficient matrix is a positive matrix. This paper mainly discusses a new decomposition of a nonsingular fuzzy matrix, a symmetric matrix times to a triangular (ST) decomposition. By this decomposition, every nonsingular fuzzy matrix can be represented as a product of a fuzzy symmetric matrix S and a fuzzy triangular matrix T.
A Method For Solving Fully Fuzzy Linear System, M. Mosleh, Saeid Abbasbandy, M. Otadi
A Method For Solving Fully Fuzzy Linear System, M. Mosleh, Saeid Abbasbandy, M. Otadi
Saeid Abbasbandy
In this paper, a numerical method for finding minimal solution of a m*n fully fuzzy linear system of the form Ax=b based on pseudo inverse calculation, is given when the central matrix of coeficients is row full rank or column full rank, and where A is a non-negative fuzzy m*n matrix, the unknown vector x is a vector consisting of n non-negative fuzzy numbers and the constant b is a vector consisting of m non-negative fuzzy numbers.
Solving Fuzzy Linear System By Fuzzy Neural Network And Applications In Economics, M. Otadi, M. Mosleh, Saeid Abbasbandy
Solving Fuzzy Linear System By Fuzzy Neural Network And Applications In Economics, M. Otadi, M. Mosleh, Saeid Abbasbandy
Saeid Abbasbandy
In this paper, a novel hybrid method based on fuzzy neu- ral network for estimate fuzzy coefficients (parameters) of fuzzy linear supply and demand function, is presented. Here a neural network is considered as a part of a large field called neural computing or soft computing. Moreover, in order to find the approximate parameters, a simple algorithm from the cost function of the fuzzy neural network is proposed.
Application Of The Fractional Complex Transform To Fractional Differential Equations, Zheng-Biao Li, Ji-Huan He
Application Of The Fractional Complex Transform To Fractional Differential Equations, Zheng-Biao Li, Ji-Huan He
Ji-Huan He
The fractional complex transform is used to analytically deal with fractional differential equations. Two examples are given to elucidate the solution procedure, showing it is extremely accessible to nonmathematicians
A Short Remark On Fractional Variational Iteration Method, Ji-Huan He
A Short Remark On Fractional Variational Iteration Method, Ji-Huan He
Ji-Huan He
This Letter compares the classical variational iteration method with the fractional variational iteration method. The fractional complex transform is introduced to convert a fractional differential equation to its differential partner, so that its variational iteration algorithm can be simply constructed
A New Fractal Derivation, Ji-Huan He
A New Fractal Derivation, Ji-Huan He
Ji-Huan He
A new fractal derive is defined, which is very easy for engineering applications to discontinuous problems, two simple examples are given to elucidate to establish governing equations with fractal derive and how to solve such equations, respectively.
Statistics In Law: Bad Inferences & Uncommon Sense, Curtis E.A. Karnow
Statistics In Law: Bad Inferences & Uncommon Sense, Curtis E.A. Karnow
Curtis E.A. Karnow
A review of classic fallacies in statistics and probability in the courts. The article briefly, and in plain English, provides an introduction to probability theory, and randomness.
Local Fractional Functional Analysis And Its Applications, Yang Xiao-Jun
Local Fractional Functional Analysis And Its Applications, Yang Xiao-Jun
Xiao-Jun Yang
Local fractional functional analysis is a totally new area of mathematics, and a totally new mathematical world view as well. In this book, a new approach to functional analysis on fractal spaces, which can be used to interpret fractal mathematics and fractal engineering, is presented. From Cantor sets to fractional sets, real line number and the spaces of local fractional functions are derived. Local fractional calculus of real and complex variables is systematically elucidated. Some generalized spaces, such as generalized metric spaces, generalized normed linear spaces, generalized Banach's spaces, generalized inner product spaces and generalized Hilbert spaces, are introduced. Elemental …
Local Fractional Laplace’S Transform Based Local Fractional Calculus, Yang Xiaojun
Local Fractional Laplace’S Transform Based Local Fractional Calculus, Yang Xiaojun
Xiao-Jun Yang
In this paper, a new modeling for the local fractional Laplace’s transform based on the local fractional calculus is proposed in fractional space. The properties of the local fractional Laplace’s transform are obtained and an illustrative example for the local fractional system is investigated in detail.
Fundamentals Of Local Fractional Iteration Of The Continuously Nondifferentiable Functions Derived Form Local Fractional Calculus, Yang Xiaojun
Xiao-Jun Yang
A new possible modeling for the local fractional iteration process is proposed in this paper. Based on the local fractional Taylor’s series, the fundamentals of local fractional iteration of the continuously non-differentiable functions are derived from local fractional calculus in fractional space.
Local Fractional Integral Transforms, Yang X
Local Fractional Integral Transforms, Yang X
Xiao-Jun Yang
Over the past ten years, the local fractional calculus revealed to be a useful tool in various areas ranging from fundamental science to various engineering applications, because it can deal with local properties of non-differentiable functions defined on fractional sets. In fractional spaces, a basic theory of number and local fractional continuity of non-differentiable functions are presented, local fractional calculus of real and complex variables is introduced. Some generalized spaces, such as generalized metric spaces, generalized normed linear spaces, generalized Banach’s spaces, generalized inner product spaces and generalized Hilbert spaces, are introduced. Elemental introduction to Yang-Fourier transforms, Yang-Laplace transforms, local …
Optimal Control Of Switched Autonomous Systems In Microbial Fed-Batch Cultures, Chongyang Liu, Enmin Feng
Optimal Control Of Switched Autonomous Systems In Microbial Fed-Batch Cultures, Chongyang Liu, Enmin Feng
Chongyang Liu
A switched autonomous system is proposed to formulate the fed-batch culture process by taking the switching instants between the feed and batch processes as control variables. To maximize the concentration of 1,3-propanediol (1,3-PD) at the terminal time, an optimal control model subject to our proposed switched autonomous system and continuous state inequality constraints is then presented.Acomputational approach is developed to find the optimal switching instants in two aspects. On the one hand, the constraint transcription and smoothing techniques are applied to dealing with the continuous state inequality constraints; on the other hand, the first and the second derivatives of the …
An Analysis Of Presence Of Long Memory In The Indian Foreign Exchange Market, Anoop Sasikumar
An Analysis Of Presence Of Long Memory In The Indian Foreign Exchange Market, Anoop Sasikumar
Anoop Sasikumar
This paper seeks to analyze the presence of long memory in the Indian foreign exchange market using a family of tests. The study has used Nominal Effective Exchange Rate (NEER) series as the data source to check the possible presence of long memory. Three R/S statistics viz. Hurst, Mandelbrot’s and Lo’s modified R/S statistics as well as two semi-parametric tests viz. Robinson’s Gaussian semi-parametric estimate and Andrews-Guggenberger modified GPH estimator are used for the purpose of analysis. All the results conclusively prove the presence of strong version of long memory in the Indian foreign exchange market.
Influence Of Most Important Radicals On The Numericaly Simulated Belousov-Zhabotinsky Oscillatory Reaction Under Batch Conditions, Zeljko D. Cupic
Influence Of Most Important Radicals On The Numericaly Simulated Belousov-Zhabotinsky Oscillatory Reaction Under Batch Conditions, Zeljko D. Cupic
Zeljko D Cupic
No abstract provided.
Structures Of Chaos In Open Reaction Systems, Zeljko D. Cupic
Structures Of Chaos In Open Reaction Systems, Zeljko D. Cupic
Zeljko D Cupic
No abstract provided.
Dynamic Behavior Of The Bray-Liebhafsky Oscillatory Reaction Controlled By Sulfuric Acid And Temperature, Zeljko D. Cupic
Dynamic Behavior Of The Bray-Liebhafsky Oscillatory Reaction Controlled By Sulfuric Acid And Temperature, Zeljko D. Cupic
Zeljko D Cupic
No abstract provided.
The Stability Of The Extended Model Of Hypothalamic-Pituitary-Adrenal (Hpa) Axis Examined By Stoichiometric Network Analysis, Zeljko D. Cupic
The Stability Of The Extended Model Of Hypothalamic-Pituitary-Adrenal (Hpa) Axis Examined By Stoichiometric Network Analysis, Zeljko D. Cupic
Zeljko D Cupic
No abstract provided.
Kinetics Of The Bray-Liebhafsky Oscillatory Reaction Perturbed By Polymer Supported Cobalt Catalyst, Zeljko D. Cupic
Kinetics Of The Bray-Liebhafsky Oscillatory Reaction Perturbed By Polymer Supported Cobalt Catalyst, Zeljko D. Cupic
Zeljko D Cupic
The Bray-Liebhafsky (BL) oscillatory reaction generated in the batch reactor at 62-68 degree C was perturbed by cobalt(II)-nitrate, supported on the macroreticular copolymer of poly-4-vinylpyridine with divinylbenzene (Co-PVPDVB). The kinetic data was analyzed of the complex pathways of the hydrogen peroxide decomposition in the examined BL reaction. The obtained results confirm that the kinetics of the BL reaction in the presence Co-PVPDVB comes partially from the Co-catalyst and partially from the macroreticular copolymer support.
Predictive Modeling Of The Hypothalamic-Pituitary-Adrenal (Hpa) Axis Response To Acute And Chronic Stress, Zeljko D. Cupic
Predictive Modeling Of The Hypothalamic-Pituitary-Adrenal (Hpa) Axis Response To Acute And Chronic Stress, Zeljko D. Cupic
Zeljko D Cupic
No abstract provided.
Football: An Intransitive Endeavour, Joe Walsh, Ian Timothy Heazlewood
Football: An Intransitive Endeavour, Joe Walsh, Ian Timothy Heazlewood
Joe Walsh
It has long been established that competitions should be structured to give each team a fair chance of winning. The aim of this research paper was, considering similarities of shared parameters between codes, to investigate intransitivity in football codes. Variables effecting probabilistic outcomes of games were identified for the football codes: soccer, gridiron, rugby union, rugby league and touch football. An algebraic probabilistic model for obtaining tactical advantage in individual transition states was developed. Hypothetical teams were constructed in order to test the possibility of intransitive games states. It was clear that intransitivity could logically exist for a variety of …
Termodynamika Procesowa (Dla Me Aparatura Procesowa) Ćw., Wojciech M. Budzianowski
Termodynamika Procesowa (Dla Me Aparatura Procesowa) Ćw., Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
The Analysis Of Heat Transfer In A Gas-Gas Heat Exchanger Operated Under A Heat-Recirculating Mode, Mariusz Salaniec, Wojciech M. Budzianowski
The Analysis Of Heat Transfer In A Gas-Gas Heat Exchanger Operated Under A Heat-Recirculating Mode, Mariusz Salaniec, Wojciech M. Budzianowski
Wojciech Budzianowski
The present paper presents the analysis of heat transfer in a gas-gas heat exchanger operated in a heat-recirculating mode.