Modelling performing calculations over the data presented in a probabilistic form

The article presents the results of comparison of different forms of representation and transformation of information in the form of non-positional probabilistic display. Assessment of the hardware of the compute nodes and the analysis of the relationship between accuracy of representing the information and their performance have been carried out

Modelling performing calculations over the data presented in a probabilistic form

The article presents the results of comparison of different forms of representation and transformation of information in the form of non-positional probabilistic display. Assessment of the hardware of the compute nodes and the analysis of the relationship between accuracy of representing the information and their performance have been carried out

Semi-markov model of processing requests to the cloud storage

This paper presents a semi-Markov model as an important part of the computer-aided manufacturing and a modular system of cloud storage, which affects the functioning of the whole process. The residence times of the system in states and the probability of system transitions are determined. There is a stationary distribution of the embedded Markov chain. The residence times of the system in states with allowance for repeated hits are determined by the theorem on the distribution functions of the residence times of the system in states with allowance for repeated hits. When using the trajectory method, the distribution function of the time for the complete processing of the read request by such a system is determined. A comparison of the expectation time complete processing the read request obtained in this study and obtained by the known formula for determining from the literature the expectation residence time in the subset of the system states

Semi-markov model of processing requests to the cloud storage

This paper presents a semi-Markov model as an important part of the computer-aided manufacturing and a modular system of cloud storage, which affects the functioning of the whole process. The residence times of the system in states and the probability of system transitions are determined. There is a stationary distribution of the embedded Markov chain. The residence times of the system in states with allowance for repeated hits are determined by the theorem on the distribution functions of the residence times of the system in states with allowance for repeated hits. When using the trajectory method, the distribution function of the time for the complete processing of the read request by such a system is determined. A comparison of the expectation time complete processing the read request obtained in this study and obtained by the known formula for determining from the literature the expectation residence time in the subset of the system states

Pareto optimization using the method of ant colony

The article deals with the development of an effective mathematical and algorithmic apparatus for solving multicriteria problems of optimizing scheduling in engineering using the Pareto principle. The proposed algorithm uses the instrumental capabilities of the ant colony method, which makes it possible to obtain the solution closest to the “preferred” point of the criteria space that is given by the user. The variant of forming the objective function as a weighted sum of separate criteria is considered

Pareto optimization using the method of ant colony

The article deals with the development of an effective mathematical and algorithmic apparatus for solving multicriteria problems of optimizing scheduling in engineering using the Pareto principle. The proposed algorithm uses the instrumental capabilities of the ant colony method, which makes it possible to obtain the solution closest to the “preferred” point of the criteria space that is given by the user. The variant of forming the objective function as a weighted sum of separate criteria is considered

Arsenic and mercury contamination of sediments of geothermal springs, mangrove lagoon and the Santispac bight, Bahía Concepción, Baja California Peninsula

In order to find out the environmental impact on the coastal zone, the composition of sediments of the intertidal hot spring zone and adjacent area of the Playa Santispac in the pristine Bahía Concepción (Baja California peninsula) was studied. High concentrations of As (13-111 mg/kg) and Hg (0.55-25.2 mg/kg) were found in the sediments of geothermal sources. Arsenic and Hg concentrations decrease rapidly in the adjacent small mangrove lagoon sediments and reach background levels (0.7- 2.6 mg/kg and 6-60 ug/kg for as and Hg respectively) in the marine sediments collected in front of Playa Santispac

A Scattered Star Group in the Orion A Region of the Milky Way

Using Gaia DR3 data, we identified an extended a ~60 pc group of stars sharing common motion but scattered in space, including from 150 to 300 probable members, named Group V. It can be associated with a group identified by Getman et al. (2019) and by Jerabkova et al. (2019) as a relic of a gas filament, traced by the mutual position of stars after the gas is swept out. We estimate its age to be approximately 16 million years. A combination of methods is applied to select probable members of Group V. We discuss the kinematic characteristics of the stars of Group V and the controversial clues they provide for understanding its nature. Due to the vicinity of a number of open clusters in the space, differentiating between members of the group and of the clusters is problematic, and mutual contamination is inevitable. The pair of clusters Gulliver 6 and UBC 17b is wrapped inside Group V but differs from it in kinematics

TANGRA – an experimental setup for basic and applied nuclear research by means of 14.1 MeV neutrons

For investigation of the basic characteristics of 14.1 MeV neutron induced nuclear reactions on a number of important isotopes for nuclear science and engineering, a new experimental setup TANGRA has been constructed at the Frank Laboratory of Neutron Physics of the Joint Institute for Nuclear Research in Dubna. For testing its performance, the angular distribution of γ-rays (and neutrons) from the inelastic scattering of 14.1 MeV neutrons on high-purity carbon was measured and the angular anisotropy of γ-rays from the reaction 12C(n, n′γ)12C was determined. This reaction is important from fundamental (differential cross-sections) and practical (non-destructive elemental analysis of materials containing carbon) point of view. The preliminary results for the anisotropy of the γ-ray emission from the inelastic scattering of 14.1- MeV neutrons on carbon are compared with already published literature data. A detailed data analysis for determining the correlations between inelastic scattered neutron and γ-ray emission will be published elsewhere