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Author(s):  
Александр Юрьевич Горнов ◽  
Антон Сергеевич Аникин ◽  
Павел Сергеевич Сороковиков ◽  
Татьяна Сергеевна Зароднюк

В статье рассматриваются специализированные вычислительные технологии и алгоритмы, используемые для поиска низкопотенциальных атомно-молекулярных кластеров. Проведенные вычислительные эксперименты продемонстрировали достаточно высокую конкурентоспособность новых алгоритмов по сравнению с классическими для функций рассматриваемого типа. С использованием разработанного программного комплекса получены рекордные результаты оптимизации атомно-молекулярных кластеров Морса рекордных размерностей. The paper deals with specialized computing technology and algorithms used for finding low-potential atomic-molecular clusters. The performed computational experiments demonstrated a rather high competitiveness of the new algorithms in comparison with the classical methods for the considerable functions. Using the developed software, the applied problem of molecular docking was solved. Using the developed software package, record results for optimization of atomic-molecular Morse clusters of large dimensions have been obtained.


2021 ◽  
Vol 2 (11(75)) ◽  
pp. 64-67
Author(s):  
A. Korotinsky ◽  
A. Shaposhnik ◽  
L. Zhuchenko

The work is aimed at solving the applied problem of developing an automatic control system for the evaporator using the principle of D-partition. Since there is always uncertainty in real problems, the solution of the problem of synthesis of the control system is reduced to the synthesis of a robust regulator. As a result, the area of robust stability of the object was obtained and an array of PI controller settings was formed, which ensures the stability of the object in the entire range of uncertainty.


Author(s):  
O. Surkov ◽  
A. Lobanov

Based on the results of the study, a scientific and applied problem was formulated, a hypothesis (multifactorial) was advanced, and partial scientific tasks were identified to develop a holistic methodology for strategic planning of the development of the Armed Forces of Ukraine based on capabilities. The relevance of the study is due to the emergence of new problems in the field of defense and military development, a decrease in the objectivity of strategic decision-making in determining and adjusting the development strategy of the Armed Forces in the long term, and the effectiveness of strategic planning for the development of the Armed Forces as a whole through the introduction of capabilities-based planning methodology in the defense forces. The requirements of modern regulatory legal acts of Ukraine regarding the introduction of planning based on the capabilities, functions of the Ministry of Defense of Ukraine and the General Staff of the Armed Forces of Ukraine, as well as the tasks of the Interdepartmental Working Group on the Defense Review (a temporary subsidiary body of the Ministry of Defense of Ukraine) are analyzed. The reasons for the emergence of problems in the construction and development of the Armed Forces are investigated, as well as contradictions in the definition and adjustment of the strategy for the development of the capabilities of the Armed Forces for the long term are revealed. The strategic planning of the development of the Armed Forces and defense planning are differentiated according to the goal, results and responsibility between the subjects of planning. The scientific and applied problem lies in the need to develop a concept of strategic planning for the development of the Armed Forces of Ukraine based on the capabilities, a set of special methods, techniques and approaches to determine and adjust the strategy for the development of the capabilities of the Armed Forces in the long term. A research hypothesis (multifactorial) about the conditions for achieving the effectiveness of strategic planning for the development of the Armed Forces of Ukraine on the basis of capabilities is put forward and partial scientific tasks are identified, which will be devoted to further research.


2021 ◽  
Vol 7 (3) ◽  
pp. 308-327 ◽  
Author(s):  
Bert Reynvoet ◽  
Andrew D. Ribner ◽  
Leanne Elliott ◽  
Manon Van Steenkiste ◽  
Delphine Sasanguie ◽  
...  

While several studies have shown that the performance on numerosity comparison tasks is related to individual differences in math abilities, others have failed to find such a link. These inconsistencies could be due to variations in which math was assessed, different stimulus generation protocols for the numerosity comparison task, or differences in inhibitory control. This within-subject study is a conceptual replication tapping into the relation between numerosity comparison, math, and inhibition in adults (N = 122). Three aspects of math ability were measured using standardized assessments: Arithmetic fluency, calculation, and applied problem solving skills. Participants’ inhibitory skills were measured using Stroop and Go/No-Go tasks with numerical and non-numerical stimuli. Finally, non-symbolic number sense was measured using two different versions of a numerosity comparison task that differed in the stimulus generation protocols (Panamath; Halberda, Mazzocco & Feigenson, 2008, https://doi.org/10.1038/nature07246; G&R, Gebuis & Reynvoet, 2011, https://doi.org/10.3758/s13428-011-0097-5). We find that performance on the Panamath task, but not the G&R task, related to measures of calculation and applied problem solving but not arithmetic fluency, even when controlling for inhibitory control. One possible explanation is that depending on the characteristics of the stimuli in the numerosity comparison task, the reliance on numerical and non-numerical information may vary and only when performance relies more on numerical representations, a relation with math achievement is found. Our findings help to explain prior mixed findings regarding the link between non-symbolic number sense and math and highlight the need to carefully consider variations in numerosity comparison tasks and math measures.


2021 ◽  
Vol 5 (7 (113)) ◽  
pp. 14-24
Author(s):  
Valeriy Chigirinsky ◽  
Olena Naumenko

Solving the problem of continuum mechanics has revealed the defining generalizations using the function argument method. The aim of this study was to devise new approaches to solving problems of continuum mechanics using defining generalizations in the Cartesian coordinate system. Additional functions, or the argument of the coordinates function of the deformation site, are introduced into consideration. The carriers of the proposed function arguments should be basic dependences that satisfy the boundary or edge conditions, as well as functions that simplify solving the problem in a general form. However, there are unresolved issues related to how not the solutions themselves should be determined but the conditions for their existence. Such generalized approaches make it possible to predict the result for new applied problems, expand the possibilities of solving them in order to meet a variety of boundary and edge conditions. The proposed approach makes it possible to define a series of function arguments, each of which can be a condition of uniqueness for a specific applied problem. Such generalizations concern determining not the specific functions but the conditions of their existence. From these positions, the flat problem was solved in the most detailed way, was tested, and compared with the studies reported by other authors. Based on the result obtained, a mathematical model of the flat applied problem of the theory of elasticity with complex boundary conditions was built. Expressions that are presented in coordinateless form are convenient for analysis while providing a computationally convenient context. The influence of the beam shape factor on the distribution of stresses in transition zones with different intensity of their attenuation has been shown. By bringing the solution to a particular result, the classical solutions have been obtained, which confirms its reliability. The mathematical substantiation of Saint-Venant's principle has been constructed in relation to the bending of a beam under variable asymmetric loading


Philosophies ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 80
Author(s):  
Philip J. Wilson

Blame for climate change inaction is rarely directed at a fundamental cause, the excessive complexity of society. It has given rise to post-truth, which has been largely reduced to unflattering stereotypes of the public, and post-trust, by which the public see their national institutions as increasingly distant and ineffectual. The two comprise post-reality, by which confidence in the truth is weakened by distance from its source, a pervasive remoteness leads to a lack of accountability and indifference, and much scholarship and institutional practice is similarly prejudiced. A gross lack of proportion goes unnoticed in discourse that is innumerate, the more readily accepted by those (including many of those in public life) with a higher education that closes the mind to technical matters and thus to the seriousness of climate change. Regarding climate change inaction as an applied problem suggests a renewed emphasis on authentic public education and on activism outside the traditional ambit of scholarship.


The work examines the process of functioning of the hydrodynamic system "reservoir-well" taking into account the dynamic process of shutting down and starting a group of production wells. A mathematical model for determining system states, an algorithm for solving an applied problem and the results of computational experiments in the form of graphs are given.


2021 ◽  
pp. 109-128
Author(s):  
Hugues Seraphin ◽  
Maximiliano Korstanje

Abstract This chapter has provided a contribution that examines the following disciplinary perspectives in the context of the visitor economy: managing stakeholders, analysing and evaluating impacts, developing and regenerating local communities and regional economies, and looking at environmental footprint and challenges. As a contribution, the chapter has examined the following applied problem-based perspectives in the context of the visitor economy: tackling overtourism, promoting wellbeing and happiness, creating 'festival cities', enhancing the visitor welcome and experience, and developing a 'city for all'. Winchester is a good example of a sustainable destination when it comes to tourism and event management. The balance is kept between attracting visitors and maintaining the level of happiness of locals. The success of this destination is based on the fact that events and tourism activities developed are meeting local needs and are not impacting negatively on any aspect of their life. Another factor that has proven to be quite important is resilience. Indeed, if the locals are naturally happy, external elements such as tourists or events are less likely to be an issue. The contribution of this chapter relies on providing an example of a destination that has managed to keep the locals happy despite the development of tourism and events activities. For practitioners, it could be a destination that could be looked at as a model. For academics, this chapter offers a list of criteria that contribute to keep locals and visitors happy while interacting in a friendly atmosphere. In a nutshell, the chapter provides another application of ambidextrous management to tourism. By doing so, it provides evidence of how broad the application of ambidextrous management can be.


2021 ◽  
Vol 341 ◽  
pp. 00013
Author(s):  
Vitaly S. Borovik ◽  
Dmitry Skorobogatchenko ◽  
Vitaly V. Borovik ◽  
Alexandra Borovik

Time is considered as production resource, which determines the need for its effective use in connection with other production resources. The problem consists in the inconsistency of the results of the existing forecasting system of production which are founded on modern concepts of space and time. The theoretical positions of Galilean, A. Lorentz and G. Minkowski were analyzed. A. Einstein’s explanations regarding the use of the velocity of light in vacuum as a constant in the well-known dependency for the generalized four-dimensional space were studied. An attempt is made to solve the applied problem in space and time, taking as a constant, for example, standard or maximum possible, (calculated) productivity.


2020 ◽  
Author(s):  
Sandra J. Potthoff ◽  
Justine H. Mishek ◽  
Gregory W. Hart

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