Dynamic Problem of Formation of Securities Portfolio Under Uncertainty Conditions

Раскін, Лев; Сіра, Оксана; Katkova, Tetiana

doi:10.21303/2461-4262.2019.00985

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…Relocation requires a number of costly actions [6]. In the existing publications, the development of production is considered in the conditions of a stable economy with low risks of possible threats [7,8].…”

Section: State Of the Artmentioning

confidence: 99%

Modeling of the relocation of high-tech enterprises for the release of innovative products

Fedorovich

Prokhorov

Pronchakov

et al. 2023

reks

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A multivariate task related to the modeling of high-tech enterprises relocation under new challenges and threats is described and solved. The relevance of the study is related to the complex solution of the complex task of moving a high-tech enterprise to a new location for the production of competitive products. The purpose of the publication is to present the created set of models that allow: to justify the choice of the location (locations) of the enterprise; to form a set of suppliers of components, considering long logistics chains; and to research the relocation of a high-tech enterprise in a special period related to martial law. The existing problems of the relocation of high-tech enterprises are analyzed: the change in the political and economic conditions of global and local production; existing long logistics supply chains of components that have vulnerabilities and are triggered when threats appear; the problem of the location of distributed production in a large area; economic losses due to complex distributed logistics of supply of components; many manufacturers of components that provide the main production process; the problem of relocation (evacuation) of enterprises in a special period, in the conditions of martial law. The model for choosing a new location for the enterprise is proposed, considering contradictory indicators: the cost (rent) of land plots for the location of the enterprise; territory preparation for the location of the enterprise; logistics costs for the enterprise moving; expenses for training (retraining) of workers; relocation project risks; etc. Taking into account the combinatorial nature of the task under consideration and the complexity of the location of the distributed enterprise (not in one, but in several locations), a model of rational placement of production was created. A method of choosing a set of suppliers of components for high-tech enterprises is developed; this method considers the length of logistics chains, the time spent on delivery, the quality of components produced by suppliers, and supply risks. A multi-criteria optimization model for choosing suppliers is created, considering some contradictory indicators. The model of relocation (evacuation) of a high-tech enterprise in a special period, in the conditions of wartime threats and risks of moving technological equipment, is proposed. A simulation model is developed to study the logistics of enterprise relocation in the form of an agent-based representation; this model simulates the events associated with the sequence of relocation actions: dismantling of technological equipment, transportation of equipment, and installation of enterprise subsystems. The emergence of threats and the consequences of their actions, which are associated with a violation of the logistics of moving the enterprise, are simulated. An illustrated example of the study of enterprise relocation in the conditions of the emergence of threats and the cessation of technological equipment movement, which leads to the search for new routes with minimal transportation risks, is given. The scientific novelty of the study is associated with the development of a complex of original optimization models, an agent-based simulation model, which allows for a scientifically justified forming requirements for the relocation of a high-tech enterprise to a new location, for ensuring the reduction of long logistics chains for the supply of components, for minimization logistics costs, for the formation of relatively dangerous logistics channels and supply routes, for minimization of risks in the conditions of new challenges and threats of a political and economic nature. The results of the study should be used for planning the relocation project of a high-tech enterprise, for the formation of measures and actions related to the relocation of a high-tech enterprise, for the creation of new safe logistics supply chains, and for the evacuation of the enterprise in a special period.

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Section: State Of the Artmentioning

confidence: 99%

Modeling of the relocation of high-tech enterprises for the release of innovative products

Fedorovich

Prokhorov

Pronchakov

et al. 2023

reks

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“…Data is protected by encryption based on domestic encryption algorithms. The maximum level of access restriction for information protected by this suite is "confidential" [11].…”

Section: Cryptographic Protection Of Information;mentioning

confidence: 99%

Забезпечення Криптографічного Захисту Державних Інформаційних Ресурсів

Каткова¹

2022

Н.Н

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Розвиток нових інформаційних технологій і впровадження комп‘ютерних систем в усі сфери людської діяльності стали причиною різкого зростання інтересу широкого кола користувачів до проблеми інформаційного захисту. Захист інформації – це сукупність методів і засобів, що забезпечують цілісність, конфіденційність і доступність інформації за умови впливу на неї загроз природного або штучного характеру, реалізація яких може призвести до завдання шкоди власникам і користувачам інформації. Провідна роль у забезпеченні інформаційної безпеки в інформаційно-телекомунікаційних системах відводиться криптографії, одними із головних задач є: забезпечення конфіденційності, цілісність та автентичність даних, що передаються. Криптографія – наука про математичні методи забезпечення конфіденційності (неможливості прочитання інформації сторонніми) і автентичності (цілісності і справжності автора) інформації. На сьогодні криптографія, як галузь знань, та криптографічний захист інформації, як окрема галузь діяльності, стосується: питань шифрувальної справи, новітніх технологій електронної торгівлі, систем автоматизованого управління, звітування та контролю тощо. Формування високопродуктивних методів шифрування(розшифрування) з високою криптографічною стійкістю є важливою складовою у вирішенні питання інформаційної безпеки. Методи криптографічного захисту інформації – це системи шифрування інформації, алгоритми захисту від нав‘язування фальшивої інформації (МАС-коди та алгоритми електронного цифрового підпису) та криптографічні протоколи розподілу ключів, автентифікації та підтвердження факту прийому (передачі) інформації. Криптографічна стійкість методів криптографічного захисту інформації – це властивість криптографічних алгоритмів і криптографічних протоколів, що характеризує їх здатність протистояти методам дешифрування (процес несанкціонованого відновлення оригіналу тексту повідомлення). Для сучасної криптографії характерне використання відкритих алгоритмів шифрування, що припускають використання обчислювальних засобів. На сьогодні відомо більше десятка перевірених методів шифрування, які при використанні ключа достатньої довжини і коректної реалізації алгоритму, роблять шифрований текст недоступним для криптоаналізу (наука "зламування" криптографічних перетворень). В процесі роботи нами розглянуто криптографічні методи та засоби захисту інформації, які є одним з елементів комплексної системи захисту інформації. Висвітлено види шифрування, а також сутність електронних підписів. Наведено правові підстави застосування криптографічних методів захисту інформації.

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“…6. The problem associated with long logistics supply chains of weapons and military equipment [11][12][13], in conditions of threats of martial law [14,15], in a heterogeneous transport network with transshipment, temporary storage and storage of military cargo. In existing papers, the issues of supplying military equipment in the conditions of a heterogeneous transport network and military threats aren't reflected [16,17].…”

Section: Introductionmentioning

confidence: 99%

Modeling of supply logistics and training of military personnel for the successful use of weapons in a combat area

Fedorovich

Chepkov

Lukhanin

et al. 2022

reks

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The problem of multivariate nature is formed and solved, which is related to the modeling of logistics actions regarding various military equipment and weapons that enter the zone of military conflict. The relevance of the research is related to the comprehensive solution to the problem of the logistical nature of the supply and mastering modern various weapons by the military to create parity of forces in the military conflict zone. The current study creates a complex of logistic methods and models that allow analyzing training of the military, supply of weapons, ammunition and spare parts to the zone of military conflict, for the successful implementation of the goals of the military operation. This article analyzes the problem of using modern and diverse military equipment, which needs to be solved by systematically presenting military training in logistics, supplying various weapons from various manufacturers to the area of combat operations. The optimization model has been created to select and justify the composition of suppliers of weapons, spare parts and ammunition, in the context of risks that arise in the production and transportation of military cargo in a heterogeneous transport network. Optimization is performed in conditions of conflicting criteria: the number of new weapons; time and costs for the production and supply of military equipment; logistical risks. To study dynamic processes in the logistics of supplying weapons, spare parts and ammunition, a model has been created that allows, with the help of simulation agents, the investigation of the paths of movement of military cargo under the conditions of military threats and possible excitation of critical vulnerabilities in the heterogeneous transport supply network. An algorithm for forming the optimal delivery route at the minimum time under risks has been developed. Simulation modeling is used to estimate the movement time of military cargo, delays in supply, accumulation of risks in cargo transportation, consequences of threats and vulnerabilities in supply logistics, etc. This study examines the process of training the military by mastering new competencies for the use of various modern weapons in combat conditions. Simultaneously, the short terms of training of military personnel and the logistics of their transportation to training centers are considered subject to the threats and risks of wartime. The effectiveness of the proposed approach is ensured by a systematic representation of the logistics of supplying various weapons, spare parts and ammunition to the conflict zone, and a comprehensive solution to the research tasks set. The scientific novelty of the conducted research is associated with the development of new methods and models based on system analysis. The following methods were used: simulation modeling, models for optimizing, competence model for acquiring new knowledge by the military personnel. The results of the study should be used to select and justify suppliers of new diverse weapons and military equipment, train the military to use modern kinds and types of weapons, plan routes and schedules for the supply of military cargo to the area of combat operations, in conditions of wartime threats.

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Dynamic Problem of Formation of Securities Portfolio Under Uncertainty Conditions

Cited by 3 publications

References 9 publications

Modeling of the relocation of high-tech enterprises for the release of innovative products

Modeling of the relocation of high-tech enterprises for the release of innovative products

Забезпечення Криптографічного Захисту Державних Інформаційних Ресурсів

Modeling of supply logistics and training of military personnel for the successful use of weapons in a combat area

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