1,255 research outputs found

    Competence amplification of correctness result verification in mathematical disciplines

    Full text link
    The ability to verify the correctness and effectiveness of the result is an important competence for all areas of training. Checking the correctness of the decision should be a mandatory final stage of solving mathematical problems. On the example of differentiation and integration of functions shown that when tested using simple numerical algorithms that can be implemented using the basic features package Excel. Assimilation of natural competence easier to implement with the help of numerical methods, which are fixed in the process of constant testingΠ£ΠΌΠ΅Π½ΠΈΠ΅ ΠΎΡΡƒΡ‰Π΅ΡΡ‚Π²Π»ΡΡ‚ΡŒ ΠΏΡ€ΠΎΠ²Π΅Ρ€ΠΊΡƒ коррСктности ΠΈ эффСктивности ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Π½ΠΎΠ³ΠΎ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π° являСтся Π²Π°ΠΆΠ½ΠΎΠΉ ΠΊΠΎΠΌΠΏΠ΅Ρ‚Π΅Π½Ρ†ΠΈΠ΅ΠΉ для всСх Π½Π°ΠΏΡ€Π°Π²Π»Π΅Π½ΠΈΠΉ ΠΏΠΎΠ΄Π³ΠΎΡ‚ΠΎΠ²ΠΊΠΈ. ΠŸΡ€ΠΎΠ²Π΅Ρ€ΠΊΠ° ΠΏΡ€Π°Π²ΠΈΠ»ΡŒΠ½ΠΎΡΡ‚ΠΈ Ρ€Π΅ΡˆΠ΅Π½ΠΈΡ Π΄ΠΎΠ»ΠΆΠ½Π° ΡΠ²Π»ΡΡ‚ΡŒΡΡ ΠΎΠ±ΡΠ·Π°Ρ‚Π΅Π»ΡŒΠ½Ρ‹ΠΌ Π·Π°Π²Π΅Ρ€ΡˆΠ°ΡŽΡ‰ΠΈΠΌ этапом Ρ€Π΅ΡˆΠ΅Π½ΠΈΡ матСматичСской Π·Π°Π΄Π°Ρ‡ΠΈ. На ΠΏΡ€ΠΈΠΌΠ΅Ρ€Π΅ диффСрСнцирования ΠΈ интСгрирования Ρ„ΡƒΠ½ΠΊΡ†ΠΈΠΉ ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, Ρ‡Ρ‚ΠΎ ΠΏΡ€ΠΈ тСстировании ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΡƒΡŽΡ‚ΡΡ простыС числСнныС Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΡ‹, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ ΠΌΠΎΠΆΠ½ΠΎ Ρ€Π΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Ρ‚ΡŒ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ Π±Π°Π·ΠΎΠ²Ρ‹Ρ… возмоТностСй ΠΏΠ°ΠΊΠ΅Ρ‚Π° Excel. УсвоСниС СстСствСннонаучных ΠΊΠΎΠΌΠΏΠ΅Ρ‚Π΅Π½Ρ†ΠΈΠΉ Π»Π΅Π³Ρ‡Π΅ Ρ€Π΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Ρ‚ΡŒ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ числСнных ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠ², ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ Π·Π°ΠΊΡ€Π΅ΠΏΠ»ΡΡŽΡ‚ΡΡ Π² процСссС постоянного тСстировани

    Methods of predicting relapsing hemorrhage.

    Get PDF
    In this article the authors presented their own original methods for predicting ulcerous gastroduodenal bleeding defended by Patent of Ukraine. The implementation of these procedures led to substantial lowing of recurrent hamorrhage rate – more than twice. All methods have pathogenetic foundation and are based on ulcerogenesis mechanisms revealed during the longlasting complex clinical and experimental research. In such a way surgeons obtain some possibilities of early diagnostics of bleeding relapses and adequate treatment and effective hemorrhage prevention accordingly.

    Optimization of complex functions and the algorithm for exact geometric search for complex roots of a polynomial

    Full text link
    The paper describes an application for visualization of four-dimensional graphs of a complex variable function. This application allowed us to construct an exact geometric algorithm for finding the real and complex roots of a polynomial on the same plane. A graph of an n-th order polynomial on the real plane allows us to define geometrically all the real roots. Number of real roots varies from 0 to n. The rest of the roots are complex and not determined by the graph. In the article, in addition to the graph of the basic polynomial, two auxiliary graphs are constructed, which allow us to represent all complex roots on the same real plane. Realization of this method is considered in detail for the solution of a cubic polynomial. In this case the method has exceptional features in comparison with polynomials of other degrees. We also propose an algorithm for constructing auxiliary functions for the general case of a polynomial of order n which have exact formulas for polynomials with order n ≀ 10. The algorithm for the first time builds the exact hodograph of poles for the control systems with feedback. We generalize the concepts of stationary and extremal points to the case of a complex function. The absence of the possibility of comparing the complex values of the objective function is compensated by an analysis of the behavior of the stationary point under small perturbations of the polynomial by linear functions. Optimality criteria are proposed using complex trajectories of stationary points. Β© 201

    A nonstationary form of the range refraction parabolic equation and its application as an artificial boundary condition for the wave equation in a waveguide

    Full text link
    The time-dependent form of Tappert's range refraction parabolic equation is derived using Daletskiy-Krein formula form noncommutative analysis and proposed as an artificial boundary condition for the wave equation in a waveguide. The numerical comparison with Higdon's absorbing boundary conditions shows sufficiently good quality of the new boundary condition at low computational cost.Comment: 12 pages, 9 figure

    The quality of geometric objects constraints and the duality gap in semi-infinite linear programming

    Full text link
    The paper considers the model of geometric object constraints defined by feasible set of semi-infinite linear programming problem (SILP). Quality geometric method for analyzing SILP duality relations based on the use of the conical hull of the system constraints coefficients is proposed. A relation between presence of the duality gap and nonclosure of the conical hull boundary of points in a multidimensional space is established. An SILP example with three variables illustrates that problems with the duality gap are not exotic. The possibility of applying the system MATLAB for numerical quality analysis of geometrical objects constraints is under discussion. We put forward a hypothesis that the duality gap of SILP adversely affects on the quality of geometric objects constraints.РассматриваСтся модСль ΠΎΠ³Ρ€Π°Π½ΠΈΡ‡Π΅Π½ΠΈΠΉ гСомСтричСского ΠΎΠ±ΡŠΠ΅ΠΊΡ‚Π°, задаваСмая допустимым мноТСством полубСсконСчной Π·Π°Π΄Π°Ρ‡ΠΈ Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠ³ΠΎ программирования (ΠŸΠ±Π›ΠŸ). ΠŸΡ€Π΅Π΄Π»Π°Π³Π°Π΅Ρ‚ΡΡ качСствСнный гСомСтричСский способ Π°Π½Π°Π»ΠΈΠ·Π° ΡΠΎΠΎΡ‚Π½ΠΎΡˆΠ΅Π½ΠΈΠΉ двойствСнности ΠŸΠ±Π›ΠŸ, основанный Π½Π° использовании коничСской ΠΎΠ±ΠΎΠ»ΠΎΡ‡ΠΊΠΈ коэффициСнтов систСмы ΠΎΠ³Ρ€Π°Π½ΠΈΡ‡Π΅Π½ΠΈΠΉ. УстанавливаСтся связь наличия Ρ€Π°Π·Ρ€Ρ‹Π²Π° двойствСнности с Π½Π΅Π·Π°ΠΌΠΊΠ½ΡƒΡ‚ΠΎΡΡ‚ΡŒΡŽ Π³Ρ€Π°Π½ΠΈΡ†Ρ‹ коничСской ΠΎΠ±ΠΎΠ»ΠΎΡ‡ΠΊΠΈ Ρ‚ΠΎΡ‡Π΅ΠΊ Π² ΠΌΠ½ΠΎΠ³ΠΎΠΌΠ΅Ρ€Π½ΠΎΠΌ пространствС. На ΠΏΡ€ΠΈΠΌΠ΅Ρ€Π΅ ΠŸΠ±Π›ΠŸ с трСмя ΠΏΠ΅Ρ€Π΅ΠΌΠ΅Π½Π½Ρ‹ΠΌΠΈ показываСтся, Ρ‡Ρ‚ΠΎ Π·Π°Π΄Π°Ρ‡ΠΈ с Ρ€Π°Π·Ρ€Ρ‹Π²ΠΎΠΌ двойствСнности Π½Π΅ ΡΠ²Π»ΡΡŽΡ‚ΡΡ экзотичСскими. ΠžΠ±ΡΡƒΠΆΠ΄Π°Π΅Ρ‚ΡΡ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ примСнСния систСмы MATLAB для числСнного Π°Π½Π°Π»ΠΈΠ·Π° качСства ΠΎΠ³Ρ€Π°Π½ΠΈΡ‡Π΅Π½ΠΈΠΉ гСомСтричСских ΠΎΠ±ΡŠΠ΅ΠΊΡ‚ΠΎΠ². ВыдвигаСтся Π³ΠΈΠΏΠΎΡ‚Π΅Π·Π° ΠΎΠ± ΠΎΡ‚Ρ€ΠΈΡ†Π°Ρ‚Π΅Π»ΡŒΠ½ΠΎΠΌ влиянии Ρ€Π°Π·Ρ€Ρ‹Π²Π° двойствСнности Π·Π°Π΄Π°Ρ‡ΠΈ ΠŸΠ±Π›ΠŸ Π½Π° качСство ΠΎΠ³Ρ€Π°Π½ΠΈΡ‡Π΅Π½ΠΈΠΉ гСомСтричСских ΠΎΠ±ΡŠΠ΅ΠΊΡ‚ΠΎΠ²

    Formalization of OLAP-cubes and relational databases with the algebra of sets

    Full text link
    Mathematical formalization of OLAP-cubes is developed. Dimensions of cube and Cartesian products are supplied with an algebra of sets and measure. These sets are involved in queries. Operations projection and cross section are consistent with the algebra of dimension. Relational connections between dimensions realized with the help of index maps on the works of these dimensions. We introduce three types of index maps to the dimension corresponding to the three types of relational ties. It is shown that the relational database is an OLAP-cube with the corresponding index maps, and can be written by one formula. As an example the analytical processing of the questionnairesΠŸΡ€Π΅Π΄Π»Π°Π³Π°Π΅Ρ‚ΡΡ матСматичСская формализация OLAP-ΠΊΡƒΠ±ΠΎΠ², Π² ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠΉ размСрности ΠΊΡƒΠ±Π° ΠΈ ΠΈΡ… Π΄Π΅ΠΊΠ°Ρ€Ρ‚ΠΎΠ²Ρ‹Π΅ произвСдСния ΡΠ½Π°Π±ΠΆΠ°ΡŽΡ‚ΡΡ Π°Π»Π³Π΅Π±Ρ€ΠΎΠΉ подмноТСств ΠΈ ΠΌΠ΅Ρ€ΠΎΠΉ. Π­Ρ‚ΠΈ мноТСства ΡƒΡ‡Π°ΡΡ‚Π²ΡƒΡŽΡ‚ Π² запросах. ΠžΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΈ ΠΏΡ€ΠΎΠ΅ΠΊΡ†ΠΈΠΈ ΠΈ сСчСния ΡΠΎΠ³Π»Π°ΡΡƒΡŽΡ‚ΡΡ с Π°Π»Π³Π΅Π±Ρ€Π°ΠΌΠΈ размСрностСй. РСляционныС связи ΠΌΠ΅ΠΆΠ΄Ρƒ размСрностями Ρ€Π΅Π°Π»ΠΈΠ·ΡƒΡŽΡ‚ΡΡ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ индСксных ΠΎΡ‚ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΠΈΠΉ Π½Π° произвСдСниях этих размСрностСй. Вводятся Ρ‚Ρ€ΠΈ Ρ‚ΠΈΠΏΠ° индСксных ΠΎΡ‚ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΠΈΠΉ Π½Π° размСрности, ΡΠΎΠΎΡ‚Π²Π΅Ρ‚ΡΡ‚Π²ΡƒΡŽΡ‰ΠΈΠ΅ Ρ‚Ρ€Π΅ΠΌ Ρ‚ΠΈΠΏΠ°ΠΌ рСляционных связСй. Показано, Ρ‡Ρ‚ΠΎ рСляционная Π±Π°Π·Π° Π΄Π°Π½Π½Ρ‹Ρ… являСтся OLAP-ΠΊΡƒΠ±ΠΎΠΌ с ΡΠΎΠΎΡ‚Π²Π΅Ρ‚ΡΡ‚Π²ΡƒΡŽΡ‰ΠΈΠΌΠΈ индСксными отобраТСниями ΠΈ ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ записана ΠΎΠ΄Π½ΠΎΠΉ Ρ„ΠΎΡ€ΠΌΡƒΠ»ΠΎΠΉ. Π’ качСствС ΠΏΡ€ΠΈΠΌΠ΅Ρ€Π° рассматриваСтся аналитичСская ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚ΠΊΠ° Π°Π½ΠΊΠ΅Ρ‚

    Competence amplification of information technologies interaction in educational process an example of Microsoft Excel application

    Full text link
    Nowadays the ability to provide programs interaction, which are written on different programming languages and between different applications, is important competence for training area β€œComputer Science and Engineering”. In this report, interaction between Java-applications and Excel spreadsheet is considered, especially popular in education field. The necessity of this interaction was caused to automate the use of the service Solver in Excel to solve the optimization task. This problem was solving within writing of course work β€œJDOM-functions usage for work with scientific data in XML-files on Java programming language”. As a result of the work the program was written in Java, interacting by means of XML-files with Excel spreadsheet and calling the service Solver by means of the vbs-scriptΠ’ настоящСС врСмя ΡƒΠΌΠ΅Π½ΠΈΠ΅ ΠΎΠ±Π΅ΡΠΏΠ΅Ρ‡ΠΈΡ‚ΡŒ взаимодСйствиС ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌ, написанных Π½Π° Ρ€Π°Π·Π½Ρ‹Ρ… языках программирования, ΠΈ Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹Ρ… ΠΏΡ€ΠΈΠ»ΠΎΠΆΠ΅Π½ΠΈΠΉ являСтся Π²Π°ΠΆΠ½ΠΎΠΉ ΠΊΠΎΠΌΠΏΠ΅Ρ‚Π΅Π½Ρ†ΠΈΠ΅ΠΉ для направлСния ΠΏΠΎΠ΄Π³ΠΎΡ‚ΠΎΠ²ΠΊΠΈ Β«Π˜Π½Ρ„ΠΎΡ€ΠΌΠ°Ρ‚ΠΈΠΊΠ° ΠΈ Π²Ρ‹Ρ‡ΠΈΡΠ»ΠΈΡ‚Π΅Π»ΡŒΠ½Π°Ρ Ρ‚Π΅Ρ…Π½ΠΈΠΊΠ°Β». Π’ Π΄ΠΎΠΊΠ»Π°Π΄Π΅ Ρ€Π°ΡΡΠΌΠ°Ρ‚Ρ€ΠΈΠ²Π°Π»ΠΎΡΡŒ взаимодСйствиС Java-ΠΏΡ€ΠΈΠ»ΠΎΠΆΠ΅Π½ΠΈΠΉ ΠΈ Ρ‚Π°Π±Π»ΠΈΡ‡Π½ΠΎΠ³ΠΎ процСссора Excel, особСнно популярном Π² ΠΎΠ±Ρ€Π°Π·ΠΎΠ²Π°Ρ‚Π΅Π»ΡŒΠ½ΠΎΠΌ пространствС. ΠΠ΅ΠΎΠ±Ρ…ΠΎΠ΄ΠΈΠΌΠΎΡΡ‚ΡŒ Π΄Π°Π½Π½ΠΎΠ³ΠΎ взаимодСйствия Π±Ρ‹Π»Π° Π²Ρ‹Π·Π²Π°Π½Π° с Ρ†Π΅Π»ΡŒΡŽ Π°Π²Ρ‚ΠΎΠΌΠ°Ρ‚ΠΈΠ·Π°Ρ†ΠΈΠΈ использования сСрвиса «Поиск Ρ€Π΅ΡˆΠ΅Π½ΠΈΡΒ» Π² Excel для Ρ€Π΅ΡˆΠ΅Π½ΠΈΡ Π·Π°Π΄Π°Ρ‡ΠΈ ΠΎΠΏΡ‚ΠΈΠΌΠΈΠ·Π°Ρ†ΠΈΠΈ. Данная ΠΏΡ€ΠΎΠ±Π»Π΅ΠΌΠ° Ρ€Π΅ΡˆΠ°Π»Π°ΡΡŒ Π² Ρ…ΠΎΠ΄Π΅ написания курсового ΠΏΡ€ΠΎΠ΅ΠΊΡ‚Π° «ИспользованиС JDOM-Ρ„ΡƒΠ½ΠΊΡ†ΠΈΠΉ для Ρ€Π°Π±ΠΎΡ‚Ρ‹ с Π½Π°ΡƒΡ‡Π½Ρ‹ΠΌΠΈ Π΄Π°Π½Π½Ρ‹ΠΌΠΈ Π² XML-Π΄ΠΎΠΊΡƒΠΌΠ΅Π½Ρ‚Π°Ρ… Π½Π° языкС JavaΒ». Π’ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π΅ Ρ€Π°Π±ΠΎΡ‚Ρ‹ Π±Ρ‹Π»Π° написана ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΠ° Π½Π° языкС Java, Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡ‚Π²ΡƒΡŽΡ‰Π°Ρ посрСдством XML-Ρ„Π°ΠΉΠ»ΠΎΠ² с Ρ‚Π°Π±Π»ΠΈΡ‡Π½Ρ‹ΠΌ процСссором Excel ΠΈ ΠΎΠ±Ρ€Π°Ρ‰Π°ΡŽΡ‰Π°ΡΡΡ ΠΊ сСрвису «Поиск Ρ€Π΅ΡˆΠ΅Π½ΠΈΡΒ» Ρ‡Π΅Ρ€Π΅Π· vbs-скрип

    Limit cycles of orthogonal projection onto the set of the most remote

    Full text link
    The problem of finding the limit polygonal cycles of orthogonal projection onto the most remote set in the plane is discussed. As a simplest case we have considered projections onto the remote side of the triangle. A criterion of existence and analytical formulas for limit triangular cycles is described. We construct the set of initial points of the sequence converging to the triangular cycle. The examples of limit polygonal cycles are presented. Numerical calculations are performed.РассмотрСна Π·Π°Π΄Π°Ρ‡Π° нахоТдСния ΠΏΡ€Π΅Π΄Π΅Π»ΡŒΠ½Ρ‹Ρ… ΠΌΠ½ΠΎΠ³ΠΎΡƒΠ³ΠΎΠ»ΡŒΠ½Ρ‹Ρ… Ρ†ΠΈΠΊΠ»ΠΎΠ² ΠΏΡ€ΠΈ ΠΎΡ€Ρ‚ΠΎΠ³ΠΎΠ½Π°Π»ΡŒΠ½ΠΎΠΌ ΠΏΡ€ΠΎΠ΅ΠΊΡ‚ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠΈ Π½Π° Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΡƒΠ΄Π°Π»Π΅Π½Π½ΠΎΠ΅ мноТСство ΠΈΠ· ΠΊΠΎΠ½Π΅Ρ‡Π½ΠΎΠ³ΠΎ Π½Π°Π±ΠΎΡ€Π° Π²Ρ‹ΠΏΡƒΠΊΠ»Ρ‹Ρ… ΠΊΠΎΠΌΠΏΠ°ΠΊΡ‚Π½Ρ‹Ρ… мноТСств Π½Π° плоскости. Π’ качСствС ΠΏΡ€ΠΎΡΡ‚Π΅ΠΉΡˆΠ΅Π³ΠΎ случая построСны ΠΏΡ€Π΅Π΄Π΅Π»ΡŒΠ½Ρ‹Π΅ Ρ†ΠΈΠΊΠ»Ρ‹ проСктирования Π½Π° Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΡƒΠ΄Π°Π»Π΅Π½Π½ΡƒΡŽ сторону Ρ‚Ρ€Π΅ΡƒΠ³ΠΎΠ»ΡŒΠ½ΠΈΠΊΠ°. ΠŸΡ€Π΅Π΄Π»ΠΎΠΆΠ΅Π½Ρ‹ ΠΊΡ€ΠΈΡ‚Π΅Ρ€ΠΈΠΉ сущСствования ΠΈ аналитичСскиС Ρ„ΠΎΡ€ΠΌΡƒΠ»Ρ‹ для ΠΏΡ€Π΅Π΄Π΅Π»ΡŒΠ½Ρ‹Ρ… Ρ‚Ρ€Π΅ΡƒΠ³ΠΎΠ»ΡŒΠ½Ρ‹Ρ… Ρ†ΠΈΠΊΠ»ΠΎΠ². Описано мноТСство Π½Π°Ρ‡Π°Π»ΡŒΠ½Ρ‹Ρ… Ρ‚ΠΎΡ‡Π΅ΠΊ ΠΏΠΎΡΠ»Π΅Π΄ΠΎΠ²Π°Ρ‚Π΅Π»ΡŒΠ½ΠΎΡΡ‚ΠΈ, сходящСйся ΠΊ Ρ‚Ρ€Π΅ΡƒΠ³ΠΎΠ»ΡŒΠ½ΠΎΠΌΡƒ Ρ†ΠΈΠΊΠ»Ρƒ. ΠŸΡ€Π΅Π΄ΡΡ‚Π°Π²Π»Π΅Π½Ρ‹ ΠΏΡ€ΠΈΠΌΠ΅Ρ€Ρ‹ ΠΌΠ½ΠΎΠ³ΠΎΡƒΠ³ΠΎΠ»ΡŒΠ½Ρ‹Ρ… цикличСских ΠΊΠΎΠ½Ρ‚ΡƒΡ€ΠΎΠ². ΠŸΡ€ΠΎΠ²Π΅Π΄Π΅Π½Ρ‹ числСнныС расчСты для Ρ‚Ρ€Π΅ΡƒΠ³ΠΎΠ»ΡŒΠ½ΠΈΠΊΠΎΠ²

    Germanium Detector with Internal Amplification for Investigation of Rare Processes

    Get PDF
    Device of new type is suggested - germanium detector with internal amplification. Such detector having effective threshold about 10 eV opens up fresh opportunity for investigation of dark matter, measurement of neutrino magnetic moment, of neutrino coherent scattering at nuclei and for study of solar neutrino problem. Construction of germanium detector with internal amplification and perspectives of its use are described.Comment: 13 pages, latex, 3 figures, report at NANP-99, International Conference on Non-Accelerator Physics, Dubna, Russia, June 29- July 3, 1999. To be published in the Proceeding
    • …
    corecore