1,409,735 research outputs found
The tomb on Monument Hill one mile south of LaGrange.
No full textA broadside explaining the tomb on monument hills importance in reference to the Texan Mier Expedition.'From The LaGrange Journal, June 15, 1933.'
njuhewei/CTDAS-Lagrange: CTDAS-Lagrange
No full text<p>The deposited archived includes the implementation of the CTDAS-Lagrange carbon assimilation system described in the paper “CTDAS-Lagrange v1.0: A high-resolution data assimilation system for regional carbon dioxide observations” published in the journal Geoscientific Model Development. <a href="https://www.geosci-model-dev-discuss.net/gmd-2017-222/">https://www.geosci-model-dev-discuss.net/gmd-2017-222/</a></p>
LAGRANGE-HAMILTON MODEL FOR CONTROL AFFINE SYSTEMS WITH POSITIVE HOMOGENEOUS COST
No full textIn this paper we give a new technique to obtain the Hamiltonian function in order to solve the driftless control affine systems (distributional systems) with positive homogeneous costs. The method consists by using the Lagrange multipliers and Legendre transformation associated to a singular Lagrangian. This method could be an alternative to the classical Pontryagin Maximum Principle.control affine systems, positive homogeneous cost, Lagrange-Hamilton formalism, Pontryagin Maximum Principle
Tools and technologies in mathematical didactics: research findings and future directions
No full textThis short paper provides an overview of recent European research about the use and impact of tools and technologies in mathematical didactics under the following three linked themes: Theme 1: theoretical ideas and resources for research design and analysis; Theme 2: the design/function of technological tools/teaching activities; Theme 3: technology and the teacher/teacher development. The paper concludes that while such European research provides a rich source of data and findings, it is probably fair to say that, as yet, insufficient research results have emerged about how ICT might contribute to effective pedagogy, although plenty of speculation is available
From Karush-Kuhn-Tucker conditions to Lagrange multipliers
No full textopenI modelli matematici sono spesso utilizzati in economia per rappresentare dei problemi decisionali, in cui è richiesto di scegliere un oggetto, che può essere a titolo di esempio una strategia pubblicitaria, un piano di produzione, un portafoglio di investimento, con lo scopo di perseguire un obiettivo ben definito.
Il problema decisionale si incentra tipicamente sulla ricerca di un punto di massimo o di minimo globale di una funzione (a più variabili) in un dominio opportuno.
Questo studio si propone, in prima analisi, di approfondire i problemi di ottimizzazione sia libera che vincolata, introducendo, inizialmente, i concetti chiave funzionali alle considerazioni successive.
In un secondo tempo, posata l’attenzione sulla sola ottimizzazione vincolata, si affronteranno le condizioni necessarie e sufficienti per la massimizzazione in presenza di vincoli nella forma più generale, formulate da Karush, Kuhn e Tucker.
Le condizioni soprammenzionate saranno ricondotte al metodo dei moltiplicatori di Lagrange che rappresenta un caso particolare in cui sono presenti esclusivamente vincoli di uguaglianza.
Al fine di dimostrare che la suddetta disciplina non è meramente teorica, nella parte finale dell’elaborato verrà illustrato il significato che possono assumere i moltiplicatori di Lagrange e un caso applicativo in cui si evidenzierà la correlazione fra l’approccio matematico precedentemente esposto e la teoria economica che ne deriva
Solar sail trajectories at the Earth-Moon Lagrange points
No full textPaper presented during Session 3, Orbital Dynamics, Symposium C1, Astrodynamics, Paper Number 13. This paper investigates displaced periodic orbits at linear order in the circular restricted Earth-Moon system, where the third massless body is a solar sail. These highly non-Keplerian orbits are achieved using an extremely small sail acceleration. The solar sail Earth-Moon system differs greatly from the Earth-Sun system as the Sun line direction varies continuously in the rotating frame and the equations of motion of the sail are given by a set of nonlinear non-autonomous ordinary differential equations. By introducing a first-order approximation, periodic orbits are derived analytically at linear order. These approximate analytical solutions are utilized in a numerical search to determine displaced periodic orbits in the full nonlinear model. The importance of finding such displaced orbits is to obtain continuous communications between the equatorial regions of the Earth and the polar regions of the Moon. As will be shown, displaced periodic orbits exist at all Lagrange points at linear order
Analytic Kramer kernels, Lagrange-type interpolation series and de Branges spaces
No full textThe classical Kramer sampling theorem provides a method for obtaining orthogonal sampling formulas. In particular, when the involved kernel is analytic in the sampling parameter it can be stated in an abstract setting of reproducing kernel Hilbert spaces of entire functions which includes as a particular case the classical Shannon sampling theory. This abstract setting allows us to obtain a sort of converse result and to characterize when the sampling formula associated with an analytic Kramer kernel can be expressed as a Lagrange-type interpolation series. On the other hand, the de Branges spaces of entire functions satisfy orthogonal sampling formulas which can be written as Lagrange-type interpolation series. In this work some links between all these ideas are established
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
A Lagrange- és Hamilton-féle differenciálegyenletek matematikai háttérrendszere
No full textA Lagrange- és Hamilton- féle differenciálegyenletek bemutatása, mind fizikai, mind matematikai szempontból. Kapcsolatuk és matematikai háttérrendszerük összefoglalása, fizikából merített példákkalgjMatematika- fizika tanárrégi képzé
T. Broude, M. L. Busch, A. Porges (eds.). -The Politics of International Economic Law, 2011
No full textLagrange Evelyne. T. Broude, M. L. Busch, A. Porges (eds.). -The Politics of International Economic Law, 2011. In: Revue internationale de droit comparé. Vol. 64 N°1,2012. pp. 354-355
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