1. 2023
  2. 2022
  3. Simulating Thermal Sheet Cutting of Figured Parts

    Verkhoturov, M., Petunin, A., Verkhoturova, G. & Zaripov, D., 1 Jan 2022, In: IFAC-PapersOnLine. 55, 10, p. 595-600 6 p.

    Research output: Contribution to journalArticlepeer-review

  4. Using PCGTSP Algorithm for Solving Generalized Segment Continuous Cutting Problem

    Petunin, A., Khachay, M., Ukolov, S. & Chentsov, P., 1 Jan 2022, In: IFAC-PapersOnLine. 55, 10, p. 578-583 6 p.

    Research output: Contribution to journalArticlepeer-review

  5. SOME APPLICATIONS OF OPTIMIZATION ROUTING PROBLEMS WITH ADDITIONAL CONSTRAINTS

    Petunin, A. A., Chentsov, A. G. & Chentsov, P. A., 2022, In: Bulletin of Udmurt University. Mathematics. Mechanics. Computer Science. 32, 2, p. 187-210 24 p.

    Research output: Contribution to journalArticlepeer-review

  6. ОПТИМАЛЬНАЯ МАРШРУТИЗАЦИЯ В ЗАДАЧАХ ПОСЛЕДОВАТЕЛЬНОГО ОБХОДА МЕГАПОЛИСОВ ПРИ НАЛИЧИИ ОГРАНИЧЕНИЙ

    Петунин, А. А., Ченцов, А. Г. & Ченцов, П. А., 2022, In: Челябинский физико-математический журнал. 7, 2, p. 209-233 25 p.

    Research output: Contribution to journalArticlepeer-review

  7. 2021
  8. Challenges and opportunities in industry 4.0 for mechatronics, artificial intelligence and cybernetics

    Liagkou, V., Stylios, C., Pappa, L. & Petunin, A., 2 Aug 2021, In: Electronics (Switzerland). 10, 16, 23 p., 2001.

    Research output: Contribution to journalReview articlepeer-review

  9. A mathematical model of the layered plate throwing by detonation products

    Besschaposchnikov, Y. P., Pai, V. V., Chernukhin, V. I. & Petunin, A. A., 8 Mar 2021, Applications of Mathematics in Engineering and Economics, AMEE 2020: Proceedings of the 46th International Conference "Applications of Mathematics in Engineering and Economics". Pasheva, V., Popivanov, N. & Venkov, G. (eds.). American Institute of Physics Inc., 090023. (AIP Conference Proceedings; vol. 2333).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  10. A variant of solving the optimization problem of finding the order of bending of sheet metal parts with parallel bends in time

    Trapeznikov, F. Y. & Petunin, A. A., 2021, In: CEUR Workshop Proceedings. 2843

    Research output: Contribution to journalConference articlepeer-review

  11. Library of Sample Image Instances for the Cutting Path Problem

    Petunin, A., Khalyavka, A., Khachay, M., Kudriavtsev, A., Chentsov, P., Polishchuk, E. & Ukolov, S., 2021, Pattern Recognition. ICPR International Workshops and Challenges, 2021, Proceedings. Del Bimbo, A., Cucchiara, R., Sclaroff, S., Farinella, G. M., Mei, T., Bertini, M., Escalante, H. J. & Vezzani, R. (eds.). Springer, p. 227-233 7 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 12665 LNCS).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  12. Problem-Specific Branch-and-Bound Algorithms for the Precedence Constrained Generalized Traveling Salesman Problem

    Khachay, M., Ukolov, S. & Petunin, A., 2021, Optimization and Applications - 12th International Conference, OPTIMA 2021, Proceedings. Olenev, N. N., Evtushenko, Y. G., Jaćimović, M., Khachay, M. & Malkova, V. (eds.). Springer, p. 136-148 13 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 13078 LNCS).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  13. 2020
  14. Optimum routing algorithms for control programs design in the CAM systems for CNC sheet cutting machines

    Petunin, A. A., Chentsov, P. A., Polishchuk, E. G., Ukolov, S. S. & Martynov, V. V., Nov 2020, Proceedings of the X All-Russian Conference "Actual Problems of Applied Mathematics and Mechanics" with International Participation, Dedicated to the Memory of Academician A.F. Sidorov and 100th Anniversary of UrFU: AFSID-2020. Fillimonov, M. (ed.). American Institute of Physics Inc., 020005. (AIP Conference Proceedings; vol. 2312).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  15. The Dependence of Actual Laser Cutting Speed on CNC Sheet Equipment on Number of NC Program Commands for Metal Grades 1.0114 and AWAIMg3

    Petunin, A. & Tavaeva, A., 8 Jun 2020, In: Journal of Physics: Conference Series. 1527, 1, 7 p., 012013.

    Research output: Contribution to journalConference articlepeer-review

  16. Energy-efficient technologies in the educational programs of the architectural higher education schools

    Zakharova, G. B., Krivonogov, A. I., Kruglikov, S. V. & Petunin, A. A., 1 Jan 2020, In: Acta Polytechnica Hungarica. 17, 8, p. 121-136 16 p.

    Research output: Contribution to journalArticlepeer-review

  17. Methods of Cutting Cost Minimizing in Problem of Tool Route Optimization for CNC Laser Machines

    Tavaeva, A. F., Petunin, A. A. & Polishchuk, E. G., 1 Jan 2020, Proceedings of the 5th International Conference on Industrial Engineering, ICIE 2019 - Volume II. Radionov, A. A., Guzeev, V. I., Rozhdestvenskiy, Y. V. & Kravchenko, O. A. (eds.). Springer Verlag, p. 447-455 9 p. (Lecture Notes in Mechanical Engineering).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  18. Routing in cnc cutting machines: Engineering constraints

    Petunin, A. A. & Chentsov, P. A., 1 Jan 2020, In: Acta Polytechnica Hungarica. 17, 8, p. 165-177 13 p.

    Research output: Contribution to journalArticlepeer-review

  19. A Novel Algorithm for Construction of the Shortest Path Between a Finite Set of Nonintersecting Contours on the Plane

    Petunin, A., Polishchuk, E. & Ukolov, S., 2020, Advances in Optimization and Applications - 11th International Conference, OPTIMA 2020, Revised Selected Papers. Olenev, N., Evtushenko, Y., Khachay, M. & Malkova, V. (eds.). Springer, p. 70-83 14 p. (Communications in Computer and Information Science; vol. 1340).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  20. PCGLNS: A Heuristic Solver for the Precedence Constrained Generalized Traveling Salesman Problem

    Khachay, M., Kudriavtsev, A. & Petunin, A., 2020, Optimization and Applications - 11th International Conference, OPTIMA 2020, Proceedings. Olenev, N., Evtushenko, Y., Khachay, M. & Malkova, V. (eds.). Springer, p. 196-208 13 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 12422 LNCS).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  21. 2019
  22. The termal deformation reducing in sheet metal at manufacturing parts by CNC cutting machines

    Petunin, A. A., Polyshuk, E. G., Chentsov, P. A., Ukolov, S. S. & Krotov, V. I., 4 Nov 2019, In: IOP Conference Series: Materials Science and Engineering. 613, 1, 5 p., 012041.

    Research output: Contribution to journalConference articlepeer-review

  23. Modeling the Initial Shape in the Tasks of Automating the Design of Electronic Means Placement on a Flat Material

    Martynov, V. V., Zakieva, E. S. & Petunin, A. A., 1 Apr 2019, 2019 International Seminar on Electron Devices Design and Production, SED 2019 - Proceedings. Uvaysov, S. U. (ed.). Institute of Electrical and Electronics Engineers Inc., 8798437. (2019 International Seminar on Electron Devices Design and Production, SED 2019 - Proceedings).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  24. A Cost Minimizing at Laser Cutting of Sheet Parts on CNC Machines

    Tavaeva, A., Petunin, A., Ukolov, S. & Krotov, V., 1 Jan 2019, Mathematical Optimization Theory and Operations Research - 18th International Conference, MOTOR 2019, Revised Selected Papers. Bykadorov, I., Strusevich, V. & Tchemisova, T. (eds.). Springer, p. 422-437 16 p. (Communications in Computer and Information Science; vol. 1090 CCIS).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  25. Optimizing Insertions in a Constraint Routing Problem with Complicated Cost Functions

    Petunin, A. A., Chentsov, A. G. & Chentsov, P. A., 1 Jan 2019, In: Journal of Computer and Systems Sciences International. 58, 1, p. 113-125 13 p.

    Research output: Contribution to journalArticlepeer-review

  26. General Model of Tool Path Problem for the CNC Sheet Cutting Machines

    Petunin, A., 2019, In: Ifac papersonline. 52, 13, p. 2662-2667 6 p.

    Research output: Contribution to journalArticlepeer-review

  27. Handling Privacy and Concurrency in an Online Educational Evaluation System

    Liagkou, V., Stylios, C. & Petunin, A., 2019, In: Baltic Journal of Modern Computing. 7, 1, p. 86-98 13 p.

    Research output: Contribution to journalArticlepeer-review

  28. On the new Algorithm for Solving Continuous Cutting Problem

    Petunin, A. A., Polishchuk, E. G. & Ukolov, S. S., 2019, In: Ifac papersonline. 52, 13, p. 2320-2325 6 p.

    Research output: Contribution to journalArticlepeer-review

  29. 2018
  30. Optimal control of the system of coupled cylinders

    Dolgii, Y. F., Petunin, A. A., Sesekin, A. N. & Tashlykov, O. L., 10 Dec 2018, Proceedings of the 44th International Conference on Applications of Mathematics in Engineering and Economics, AMEE 2018. Venkov, G., Popivanov, N. & Pasheva, V. (eds.). American Institute of Physics Inc., Vol. 2048. 020007

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  31. Model of megalopolises in the tool path optimisation for CNC plate cutting machines

    Chentsov, A. G., Chentsov, P. A., Petunin, A. A. & Sesekin, A. N., 18 Jul 2018, In: International Journal of Production Research. 56, 14, p. 4819-4830 12 p.

    Research output: Contribution to journalArticlepeer-review

  32. Research into Dry Turning of Welded Surface by Replaceable Cutting Insert with Closed Loop Heat Removal

    Kuznetsov, V. P., Skorobogatov, A. S., Petunin, A. A. & Voropayev, V. V., 17 Jul 2018, In: Journal of Physics: Conference Series. 1045, 1, 012024.

    Research output: Contribution to journalConference articlepeer-review

  33. Simulation of multi-axis machining using the BSP-dexel representation

    Katz, E., Kurennov, D. & Petunin, A., 1 Jan 2018, 50th International Symposium on Robotics, ISR 2018. Wiley-VCH Verlag, p. 123-126 4 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  34. О МНОГОСЛОЙНОМ МЕТАНИИ ПЛАСТИН СКОЛЬЗЯЩЕЙ ДЕТОНАЦИОННОЙ ВОЛНОЙ

    Бесшапошников, Ю. П., Пай, В. В., Петунин, А. А. & Чернухин, В. И., 2018, In: Известия Волгоградского государственного технического университета. 11(221), p. 22-27 6 p.

    Research output: Contribution to journalArticlepeer-review

  35. 2017
  36. A genetic algorithm used for solving one optimization problem

    Shipacheva, E. N., Petunin, A. A. & Berezin, I. M., 12 Dec 2017, Mechanics, Resource and Diagnostics of Materials and Structures, MRDMS 2017: Proceedings of the 11th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. American Institute of Physics Inc., Vol. 1915. 040052

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  37. Резец с комбинированным охлаждением: патент на полезную модель

    Кузнецов, В. П., Скоробогатов, А. С., Горгоц, В. Г. & Петунин, А. А., 17 Nov 2017, IPC No. B23B 27/10, Федеральный институт промышленной собственности, Patent No. 175079, 30 Dec 2016, Priority No. 2016152748

    Research output: Patent

  38. Optimal and heuristic algorithms of planning of low-rise residential buildings

    Kartak, V. M., Marchenko, A. A., Petunin, A. A., Sesekin, A. N. & Fabarisova, A. I., 12 Oct 2017, Application of Mathematics in Technical and Natural Sciences: 9th International Conference for Promoting the Application of Mathematics in Technical and Natural Sciences, AMiTaNS 2017. American Institute of Physics Inc., Vol. 1895. 110002

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  39. About routing in the sheet cutting

    Petunin, A. A., Chentsov, A. G. & Chentsov, P. A., 1 Aug 2017, In: Bulletin of the South Ural State University, Series: Mathematical Modelling, Programming and Computer Software. 10, 3, p. 25-39 15 p.

    Research output: Contribution to journalArticlepeer-review

  40. Elements of Dynamic Programming in Local Improvement Constructions for Heuristic Solutions of Routing Problems with Constraints

    Petunin, A. A., Chentsov, A. A., Chentsov, A. G. & Chentsov, P. A., Apr 2017, In: Automation and Remote Control. 78, 4, p. 666-681 16 p.

    Research output: Contribution to journalArticlepeer-review

  41. Finite-element simulation of the cold stamping process of spherical vessels

    Berezin, I. M., Petunin, A. A., Kryuchkov, D. I. & Kovács, G. L., 2017, In: Pollack Periodica. 12, 1, p. 81-92 12 p.

    Research output: Contribution to journalArticlepeer-review

  42. Investigation of Cutting Speed Influence on Optimality of the Tool Path Route for CNC Laser Cutting Machines

    Tavaeva, A. F. & Petunin, A. A., 2017, 2017 International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2017 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 5 p. 8076452

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  43. Route optimization on the nuclear objects and in mechanical engineering

    Petunin, A. A., Sesekin, A. N., Tashlykov, O. L. & Chentsov, A. G., 2017, In: CEUR Workshop Proceedings. 1825, p. 69-79 11 p.

    Research output: Contribution to journalArticlepeer-review

  44. ВЫЧИСЛЕНИЕ СТОИМОСТИ ЛАЗЕРНОЙ РЕЗКИ В ЗАДАЧЕ ОПТИМИЗАЦИИ МАРШРУТА РЕЖУЩЕГО ИНСТРУМЕНТА НА МАШИНАХ С ЧПУ СПЕЦИАЛИЗИРОВАННОГО ЯЗЫКА УПРАВЛЕНИЯ ДАННЫМИ

    Таваева, А. Ф. & Петунин, А. А., 2017, In: Вестник Белгородского государственного технологического университета им. В.Г. Шухова. 12, p. 194-202 9 p.

    Research output: Contribution to journalArticlepeer-review

  45. Исследование твердого точения наплавленной поверхности инструментом с замкнутой системой теплоотвода от сменной пластины

    Кузнецов, В. П., Скоробогатов, А. С., Воропаев, В. В. & Петунин, А. А., 2017, In: Вестник Рыбинской государственной авиационной технологической академии им. П.А. Соловьева. 2 (41), p. 169-174 6 p.

    Research output: Contribution to journalArticlepeer-review

  46. НЕКОТОРЫЕ ВОПРОСЫ ОПТИМИЗАЦИИ МАРШРУТА ИНСТРУМЕНТА ДЛЯ МАШИН ФИГУРНОЙ ЛИСТОВОЙ РЕЗКИ С ЧИСЛОВЫМ ПРОГРАММНЫМ УПРАВЛЕНИЕМ

    Таваева, А. Ф. & Петунин, А. А., 2017, In: Вестник Белгородского государственного технологического университета им. В.Г. Шухова. 9, p. 147-153

    Research output: Contribution to journalArticlepeer-review

  47. 2016
  48. About one algorithm of the broken line approximation and a modeling of tool path for CNC plate cutting machines

    Kurennov, D., Petunin, A. A., Repnitskii, V. B. & Shipacheva, E. N., 16 Dec 2016, APPLICATIONS OF MATHEMATICS IN ENGINEERING AND ECONOMICS (AMEE'16). Pasheva, Popivanov, N. & Venkov, G. (eds.). American Institute of Physics Publising LLC, Vol. 1789. 6 p. 060004. (AIP Conference Proceedings; vol. 1789).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  49. About some types of constraints in problems of routing

    Petunin, A. A., Polishuk, E. G., Chentsov, A. G., Chentsov, P. A. & Ukolov, S. S., 16 Dec 2016, APPLICATIONS OF MATHEMATICS IN ENGINEERING AND ECONOMICS (AMEE'16). Pasheva, Popivanov, N. & Venkov, G. (eds.). American Institute of Physics Publising LLC, Vol. 1789. 8 p. 060002. (AIP Conference Proceedings; vol. 1789).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  50. An information technology view of manufacturing automation - Product life-cycle management

    Kovács, G. L. & Petunin, A., 1 Aug 2016, In: Pollack Periodica. 11, 2, p. 3-14 12 p.

    Research output: Contribution to journalArticlepeer-review

  51. A WebGIS application for cloud storm monitoring

    Kolios, S., Loukadakis, D., Stylios, C., Kazantzidis, A. & Petunin, A., 2016, Databases and Information Systems - 12th International Baltic Conference, DB and IS 2016, Proceedings. Springer Verlag, Vol. 615. p. 151-163 13 p. (Communications in Computer and Information Science; vol. 615).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  52. From the first chess-automaton to the mars pathfinder

    Kovacs, G., Petunin, A., Ivanko, J. & Yusupova, N., 2016, In: Acta Polytechnica Hungarica. 13, 1, p. 61-81 21 p.

    Research output: Contribution to journalArticlepeer-review

  53. Optimization Models of Tool Path Problem for CNC Sheet Metal Cutting Machines

    Petunin, A. A. & Stlios, C., 2016, In: Ifac papersonline. 49, 12, p. 23-28 6 p.

    Research output: Contribution to journalArticlepeer-review

  54. Routing problems: constraints and optimality

    Chentsov, A. G., Chentsov, P. A., Petunin, A. A. & Sesekin, A. N., 2016, In: Ifac papersonline. 49, 12, p. 640-644 5 p.

    Research output: Contribution to journalArticlepeer-review

  55. The 3D Object Packing Problem into a Parallelepiped Container Based on Discrete-Logical Representation

    Verkhoturov, M., Petunin, A., Verkhoturova, G., Danilov, K. & Kurennov, D., 2016, In: Ifac papersonline. 49, 12, p. 1-5 5 p.

    Research output: Contribution to journalArticlepeer-review

  56. The cutter speed determination of CNC laser cutting machines for precise calculation of objective function of tool path problem

    Tavaeva, A. F. & Petunin, A. A., 2016, 2016 2nd International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2016 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 7911618

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  57. Tool Routing Problem for CNC Plate Cutting Machines

    Chentsov, P. A. & Petunin, A. A., 2016, In: Ifac papersonline. 49, 12, p. 645-650 6 p.

    Research output: Contribution to journalArticlepeer-review

  58. 2015
  59. Heuristic algorithms for solving of the tool routing problem for CNC cutting machines

    Chentsov, P. A., Petunin, A. A., Sesekin, A. N., Shipacheva, E. N. & Sholohov, A. E., 30 Nov 2015, 41st International Conference "Applications of Mathematics in Engineering and Economics", AMEE 2015. Pasheva, Popivanov, N. & Venkov, G. (eds.). American Institute of Physics Publising LLC, Vol. 1690. 6 p. 030004. (AIP Conference Proceedings; vol. 1690).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  60. Modeling of tool path for the CNC sheet cutting machines

    Petunin, A. A., 30 Nov 2015, 41st International Conference "Applications of Mathematics in Engineering and Economics", AMEE 2015. Pasheva, Popivanov, N. & Venkov, G. (eds.). American Institute of Physics Publising LLC, Vol. 1690. 7 p. 060002. (AIP Conference Proceedings; vol. 1690).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  61. A WebGIS platform to monitor environmental conditions in ports and their surroundings in South Eastern Europe

    Kolios, S., Stylios, C. & Petunin, A., Sept 2015, In: Environmental Monitoring and Assessment. 187, 9, 16 p., 574.

    Research output: Contribution to journalArticlepeer-review

  62. МАТЕРИАЛОВЕДЕНИЕ. МАШИНОСТРОЕНИЕ. ЭНЕРГЕТИКА: сборник научных трудов

    Богатов, А. А. (ed.), Гервасьев, М. А. (ed.), Попов, А. А. (ed.), Петунин, А. А. (ed.), Митюшов, Е. А. (ed.), Кожушко, Г. Г. (ed.), Либерман, Я. Л. (ed.), Мунц, В. А. (ed.), Зюзев, А. М. (ed.), Кокин, С. Е. (ed.) & Овчинникова, В. А. (ed.), 2015, Екатеринбург: Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Уральский федеральный университет им. первого Президента России Б.Н. Ельцина". 732 p.

    Research output: Book/ReportBookpeer-review

  63. О КЛАССИФИКАЦИИ ТЕХНИК ФИГУРНОЙ ЛИСТОВОЙ РЕЗКИ ДЛЯ МАШИН С ЧПУ И ОДНОЙ ЗАДАЧЕ МАРШРУТИЗАЦИИ ИНСТРУМЕНТА: статья в сборнике статей

    Петунин, А. А. & Кротов, В. И., 2015, МАТЕРИАЛОВЕДЕНИЕ. МАШИНОСТРОЕНИЕ. ЭНЕРГЕТИКА: сборник научных трудов. Овчинникова, В. А. (ed.). Екатеринбург: Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Уральский федеральный университет им. первого Президента России Б.Н. Ельцина", p. 466-475

    Research output: Chapter in Book/Report/Conference proceedingChapter

  64. ОБ ОДНОЙ ЗАДАЧЕ МАРШРУТИЗАЦИИ ПЕРЕМЕЩЕНИЙ ИНСТРУМЕНТА ПРИ ЛИСТОВОЙ РЕЗКЕ ДЕТАЛЕЙ

    Петунин, А. А., Ченцов, А. Г. & Ченцов, П. А., 2015, In: Моделирование и анализ информационных систем. 22, 2(56), p. 278-294 17 p.

    Research output: Contribution to journalArticlepeer-review

  65. 2014
  66. ЛОКАЛЬНЫЕ ВСТАВКИ НА ОСНОВЕ ДИНАМИЧЕСКОГО ПРОГРАММИРОВАНИЯ В ЗАДАЧЕ МАРШРУТИЗАЦИИ С ОГРАНИЧЕНИЯМИ

    Петунин, А. А., Ченцов, А. Г. & Ченцов, П. А., 2014, In: Вестник Удмуртского университета. Математика. Механика. Компьютерные науки. 2, 56-75.

    Research output: Contribution to journalArticlepeer-review

ID: 91758