Розроблено метод напiвадаптивної масштабної трансформацiї порогу, що забезпечує обчислення рекурентних дiаграм, якi адекватно вiдображають особливостi динамiки реальних складних динамiчних систем природної i технiчної сфери. Новий науковий результат полягає в розвитку теоретичної основи методу напiвадаптивної масштабної трансформацiї порогу при обчисленнi рекурентних дiаграм шляхом удосконалення лiнiйних нормованих просторiв за рахунок введення скалярного добутку векторiв. Пропонований метод трансформацiї порога забезпечує обчислення рекурентних дiаграм, якi мають пiдвищену iнформативнiстю, iнварiантнiстю щодо параметрiв вимiрюваних векторiв станiв, а також нерегулярностi вимiрювань. Перевiрка працездатностi запропонованого методу напiвадаптивної масштабної трансформацiї порогу проведена на основi експериментальних вимiрювань концентрацiй формальдегiду, амiаку та оксиду вуглецю в атмосферному повiтрi типового промислового мiста при традицiйних стацiонарних та рухомих джерелах забруднень. Отриманi результати обчислення рекурентних дiаграм з урахуванням запропонованого методу напiвадаптивної масштабної трансформацiї порогу в цiлому пiдтверджують його працездатнiсть. Встановлено, що обчислення RP при напiвадаптивнiй трансформацiї порогу для рiзних кутових розмiрiв α конуса рекурентностi, рiвних 1°, 5°, 10° i 20° свiдчить про те, що зi зменшенням кутових розмiрiв конуса точнiсть рекурентних дiаграм виявляти небезпечнi стани в динамiчних системах зростає. Експериментально встановлено, що для адекватного вiдображення рекурентних станiв реальних динамiчних систем, за допомогою обчислюваних рекурентних дiаграм, значення величини кутових розмiрiв конуса рекурентностi повиннi складати 1-5°К лючовi слова: рекурентная дiаграма, складнi динамiчнi системи, напiвадаптивна трансформацiя порога, забруднення атмосфери UDC 004.
The development of computer technology has determined the vector for the expansion of services based on the Internet and "G" technologies. The main requirements for modern services in the banking sector are security and reliability. At the same time, security is considered not only as ensuring the confidentiality and integrity of transactions, but also their authenticity. However, in the post-quantum period, US NIST specialists question the durability of modern means of providing basic security services based on symmetric and asymmetric cryptography algorithms. The increase in computing resources allows attackers to use modern threats in combination. Thus, there is a need to search for new and/or modify known algorithms for generating MAC (message authentication codes). In addition, the growth of services increases the amount of information that needs to be authenticated. Among the well-known hash algorithms, the hash functions of universal hashing are distinguished, which allow initially determining the number of collisions and their uniform distribution over the entire set of hash codes. Possibilities of modifying the cascade hashing algorithm UMAC (message authentication code based on universal hashing, universal MAC) based on the use of McEliece crypto-code construction on algebrogeometric (elliptic codes (EC), modified elliptic codes (MEC) and damaged codes (DC). This approach allows preserving the uniqueness property, in contrast to the classical UMAC scheme based on a block symmetric cipher (AES). The presented algorithms for evaluating the properties of universality and strict universality of hash codes make it possible to evaluate the security of the proposed hashing constructs based on universal hash functions, taking into account the preservation of the universality property
This paper proposes an algorithm for substantiating the type and volume of redundant structural and functional elements of reconnaissance-firing systems, taking into consideration the operational patterns of such systems. Underlying this algorithm is the combination of survivability assessment methods and reliability assessment methods. Such an arrangement aimed to improve the efficiency of the application of these methods and reduce uncertainty in the calculations. The results from calculating an example of the application of a procedure for substantiating the type and volume of redundant structural and functional elements of reconnaissance-firing systems have been analyzed. The analysis of the results shows that the set task is fulfilled, in particular the specified probability of trouble-free functioning of a reconnaissance-firing system, with a combined type of redundancy. Moreover, it implies giving preference to passive redundancy, using active one only to critical elements – individual functional elements of the control subsystem. The advantage of a mixed type of redundancy over a passive redundancy is 28 %. In addition, it has been established that the multiplicity of redundancy, for accepted conditions, should not be lower than 2. A procedure for substantiating the type and volume of redundant structural and functional elements of reconnaissance-firing systems has been devised, taking into consideration the operational patterns of such systems. The specified procedure includes an algorithm, as well as methods for assessing survivability and methods for assessing the reliability of functioning. This procedure was tested for feasibility by considering an example of justifying the type and volume of redundant structural and functional elements of reconnaissance-firing systems that produced an adequate result. The result has been confirmed by the practical application of reconnaissance-firing systems in recent armed conflicts
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