?
Распределение логарифма сложности индивидуальных задач коммивояжера при фиксированной длине входа/ Probability distribution of the complexity of the individual traveling salesman problem (fixed number of nodes)
С. 304–310.
Головешкин В. А., Жукова Г. Н., Ulyanov M., Fomichev M.
It is shown that the logarithm of the complexity (number of nodes in the decision tree of a branch and bound algorithm) of the individual traveling salesman problem is approximately normally distributed. We use a linear regression model (logarithm of the complexity — standard normal distribution) to estimate parameters of normal distribution, which fit the sample. Borders of the interval, which contains 90% of the sample of the logarithm of the complexity, are also given.
In book
Vol. 1761: SITITO 2016. Modern Information Technologies and IT-Education. Selected Papers of the XI International Scientific-Practical Conference Modern Information Technologies and IT-Education (SITITO 2016). Moscow, Russia, November 25-26, 2016. , CEUR Workshop Proceedings, 2016.
Zhukova G., Ulyanov M., , in: Modern Information Technology and IT Education: 12th International Conference, SITITO 2017, Moscow, Russia, November 24–26, 2017, Revised Selected PapersVol. 1204.: Springer, 2021. P. 261–270.
This article is about the probability distribution of the maximum of the logarithm of the complexity of an individual travelling salesman problem. The complexity is defined as a number of nodes of the decision tree, which was created by the branch and bound algorithm. We applied our earlier results that the distribution of the logarithm ...
Added: June 15, 2021
Ignatov A., Andrei Gorchakov, Open Computer Science 2020 Vol. 10 No. 1 P. 112–116
The paper describes a simulator of parallel Branch and Bound (BnB) method. Several subdomain trees for benchmark functions are analyzed, a characteristic Gaussian-like distribution is discovered. An algorithm of artificial tree generation is formulated according to this criterion. The process of simulator modeling is described, several computational experiments are conducted. Their results show a hyperbolic ...
Added: June 11, 2020
Fomichev M., Системы управления и информационные технологии 2017 № 3 С. 88–92
Branch-and-bound algorithm for solving Traveling Salesman Problem is one of the most applied accurate algorithms to solve it. Metaheuristic algorithms for solving asymmetric Traveling Salesman Problem do not assure finding optimal solution, although they work “fast”. The combination of such algorithms with the branch-and-bound algorithm is analyzed in this article. ...
Added: March 23, 2020
Fomichev M., Информационные технологии моделирования и управления 2018 Т. 109 № 1 С. 47–54
В современном мире промедление в секунду, или даже долю секунды, может стоить миллионы рублей. Заинтересованному лицу важно получить точный ответ на вопрос в кратчайшие сроки. Но, к сожалению, даже при ны- нешних вычислительных мощностях, многие задачи не могут быть решены точно за приемлемое время. ...
Added: March 22, 2020
Головешкин В. А., Zhukova G., Ulyanov M. et al., Системы компьютерной математики и их приложения 2017 № 18 С. 136–138
В докладе рассматривается статистическая зависимость числа
порожденных вершин дерева решений и физического времени работы
программной реализации метода ветвей и границ для задачи
коммивояжера (TSP). На основе результатов вычислительного
эксперимента получено приближенное соотношение между числом
порожденных вершин (сложность индивидуальной TSP) и физическим
временем. Предлагается использовать это эмпирическое соотношение
для прогнозирования времени работы программы, решающей TSP с
числом «городов» больше 40. ...
Added: March 22, 2020
Мищенко Александр Владимирович, Кошелев П. С., Прикладная информатика 2018 № 2 С. 5–21
В статье рассмотрены методы и программные средства оптимизации оптовых закупок. ...
Added: March 11, 2020
Ulyanov M., Fomichev M., Информационные технологии 2019 Т. 25 № 10 С. 590–595
The algorithm that implements the Branch and Bound method for solving the Traveling Salesman Problem is one of the common exact algorithms for solving it. Metaheuristic algorithms for solving this problem do not guarantee obtaining an exact solution, however they work "quickly". In order to reduce the nodes number of the generated decision tree in ...
Added: February 16, 2020
Fomichev M., Ulyanov M., Информационные технологии 2018 Т. 24 № 11 С. 698–704
Повышение временной эффективности программных реализаций метода ветвей и границ для асимметричной задачи коммивояжера может быть достигнуто как за счет выбора наиболее приемлемой структуры данных, обеспечивающей эффективные по времени операции с листьями поискового дерева решений, так и за счет использования дополнительной памяти для хранения усеченных матриц в листьях поискового дерева решений. Дополнительно могут быть предложены и ...
Added: January 26, 2020
Zhukova G., Ulyanov M., Fomichev M., Automation and Remote Control 2019 Vol. 80 No. 11 P. 2054–2067
We present the results of a comparative statistical analysis of the time for solving the asymmetric traveling salesman problem (ATSP) with the branch-and-bound method (without precalculation of the tour) and with a hybrid method. The hybrid method consists of the Lin–Kernighan–Helsgaun approximate algorithm used to calculate the initial tour and the branch-and-bound method. We show ...
Added: November 24, 2019
Zhukova G., Ulyanov M., Fomichev M., Автоматика и телемеханика 2019 № 11 С. 155–172
We present the results of a comparative statistical analysis of the time for solving the asymmetric traveling salesman problem (ATSP) with the branch-and-bound method (without precalculation of the tour) and with a hybrid method. The hybrid method consists of the Lin-Kernighan-Helsgaun approximate algorithm used to calculate the initial tour and the branch-and-bound method. We show ...
Added: November 10, 2019
Ignatov A., Posypkin M., Communications in Computer and Information Science 2018 P. 511–522
The paper proposes an implementation of the Branch-and-Bound method for an enterprise grid based on the BOINC infrastructure. The load distribution strategy and the overall structure of the developed system are described with special attention payed to some specific issues such as incumbent updating and load distribution. The implemented system was experimentally tested on a ...
Added: October 18, 2019
Zhukova G., Ulyanov M., Fomichev M., Бизнес-информатика 2018 Т. 45 № 3 С. 20–28
For practical, important tasks in the fi elds of economics and logistics, as well as in a number of technical applications, it becomes necessary to solve the traveling salesman problem (TSP). Quite often, the features of these problems lead to the traveling salesman problem in asymmetric formulation (asymmetric traveling salesman problem, ATSP). Moreover, in some ...
Added: December 11, 2018