scholarly journals Bernoulli Collocation Polynomials Algorithm for Calculus of Variational Problems

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Mohammed Abdelhadi Sarhan

<p>This paper presents an approximate method that depends on the Bernoulli Polynomials as basic functions. The method is concerned with collocation technique for solving problems in calculus of variation. Some interesting properties of Bernoulli polynomials are used to reduce the original problem to mathematical problem. Some illustrative examples are described to show the applicability of the proposed method.</p>

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Emran Tohidi ◽  
Adem Kılıçman

A new collocation method is developed for solving BVPs which arise from the problems in calculus of variation. These BVPs result from the Euler-Lagrange equations, which are the necessary conditions of the extremums of problems in calculus of variation. The proposed method is based upon the Bernoulli polynomials approximation together with their operational matrix of differentiation. After imposing the collocation nodes to the main BVPs, we reduce the variational problems to the solution of algebraic equations. It should be noted that the robustness of operational matrices of differentiation with respect to the integration ones is shown through illustrative examples. Complete comparisons with other methods and superior results confirm the validity and applicability of the presented method.


1972 ◽  
Vol 94 (1) ◽  
pp. 67-70 ◽  
Author(s):  
R. F. Dressler

The four natural boundary conditions are derived for a newly observed symmetry in Bourdon tube action. The problem is described by an eighth-order system of pde’s for a Donnell-type shell theory. These, together with boundary conditions for the geometric symmetry and for the free end with rigid plug, comprise a well-posed mathematical problem. It requires only one-fourth the integration domain of the problem posed without symmetry, hence reduces storage requirements in computer calculations to one-sixteenth the number for the original problem.


2010 ◽  
Vol 44-47 ◽  
pp. 3423-3426 ◽  
Author(s):  
Hong Wei Jiao ◽  
Kun Li

In this paper, we develop an algorithm to globally solve a kind of mathematical problem. Firstly, by utilizing equivalent problem and linear relaxation method, a linear relaxation programming of original problem is established. Secondly, by using branch and bound technique, a determined global optimization algorithm is proposed for solving equivalent problem. Finally, the convergence of the proposed algorithm is proven and numerical examples showed that the presented algorithm is feasible to solve the kind of mathematical problems.


Author(s):  
Светлана Николаевна Горлова

В работе обоснована возможность формирования исследовательской компетенции в процессе обучения математике; выявлена взаимосвязь составляющих исследовательской компетенции и результатов освоения предметной области «Математика» основной образовательной программы; обозначен методический потенциал предметного математического содержания в формировании исследовательской компетенции. Определяющим фактором в вопросе выбора средств формирования исследовательской компетенции является деятельностный подход к пониманию ее сущности, согласно которому исследовательская компетенция - результат деятельности в рамках специально сконструированных ситуаций. Ведущие характеристики исследовательской компетенции - способность создать продукт, обоснованность выводов, возможность выбора траектории исследования - позволили сделать выбор в пользу математической задачи как предметной основы для формирования исследовательской компетенции. В качестве средства ее формирования рассматривается конструирование обучающимися задач на основе решенной математической задачи. В работе обозначены реализованные на практике варианты конструирования на основе варьирования данных исходной задачи: замена данных объектов (или их частей) на искомые и наоборот; замена одних данных объектов другими; введение в условие задачи новых данных или искомых объектов; наложение специфических условий на данные (или их часть); обращение задачи. The paper substantiates the formation of research competence in the process of teaching mathematics; reveals the relationship between the components of research competence and the results of mastering the main educational program; indicates the methodological potential of the subject mathematical content in the formation of research competence. The determining factor in the choice of means of formation of research competence is an activityoriented approach to understanding its essence, according to which, research competence is the result of activities in the framework of specially designed situations. The main characteristics of research competence - the ability to create a product, the validity of conclusions and the ability to choose a research trajectory - made it possible to make a choice in favor of a mathematical problem as an objective basis for the formation of research competence. The author considers students’ designing new problems on the basis of a solved mathematical problem as the means of formation of research competence. The paper presents the design options implemented in practice based on varying the data of the original problem by replacing the data of objects (or their parts) with the desired ones and vice versa, by replacing some data objects with others, by introducing new data or desired objects into the problem statement, by imposing specific conditions on the data (or a part), and by transforming the problem.


2010 ◽  
Vol 26-28 ◽  
pp. 1032-1035
Author(s):  
Jing Ben Yin ◽  
Kun Li ◽  
Hong Wei Jiao ◽  
Yong Qiang Chen

In this paper, we proposed an algorithm to globally solve a class of mathematical problems in mechanical system. Firstly, by utilizing equivalent problem and linear relaxation technique, a linear relaxation programming of original mathematical problem is established. Secondly, by using branch and bound theory, a feasible algorithm is proposed for globally solving original problem. Finally, the convergence of the proposed algorithm is proven, and numerical experiments showed that the presented algorithm is feasible.


2021 ◽  
Vol 10 (12) ◽  
pp. 3549-3568
Author(s):  
A. Hamidat ◽  
A. Aissaoui

We consider a mathematical problem for quasistatic contact between a thermo-electro--elastic-viscoplastic body and an obstacle. The contact is modeled by a general normal damped response condition with friction law and heat exchange. We present a variational formulation of the problem and prove the existence and uniqueness of the weak solution. The proof is based on the formulation of four intermediate problems for the displacement field, the electric potential field and the temperature field, respectively. We prove the unique solvability of the intermediate problems, then we construct a contraction mapping whose unique fixed point is the solution of the original problem.


Author(s):  
R. A. Crowther

The reconstruction of a three-dimensional image of a specimen from a set of electron micrographs reduces, under certain assumptions about the imaging process in the microscope, to the mathematical problem of reconstructing a density distribution from a set of its plane projections.In the absence of noise we can formulate a purely geometrical criterion, which, for a general object, fixes the resolution attainable from a given finite number of views in terms of the size of the object. For simplicity we take the ideal case of projections collected by a series of m equally spaced tilts about a single axis.


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