Knowledge-based Algorithms for BDI-agents Shilov, Nikolay Vyacheslavovich; Garanina, Natalia Olegovna
Modelirovanie i analiz informacionnyh sistem,
12/2020, Letnik:
27, Številka:
4
Journal Article
Recenzirano
Odprti dostop
Multiagent algorithm is a knowledge-based distributed algorithm that solves some problems by means of cooperative work of agents. From an individual agent's perspective, a multiagent algorithm is a ...reactive and proactive knowledge/believe-based rational algorithm aimed to achieve an agent's own desires. In the paper we study a couple of knowledge-based multiagent algorithms. One particular algorithm is for a system consisting of agents that arrive one by one (in a non-deterministic order) to a resource center to rent (for a while) one of available desired resources. Available resources are passive, they form a cloud; each of the available resources is lent on demand if there is no race for this resource and returns to the cloud after use. Agents also form a cloud but leave the cloud immediately when they rent a desired resource. The problem is to design a knowledge-based multiagent algorithm, which allows each arriving agent eventually to rent some of desired resources (without race for these resources).
This article offers a general overview of the most important events in the religious life of Mordovia in the early 2000s - mid 2010s, on which basis it is possible to trace the main trends in the ...religious situation in the country at the present stage. Particular attention is paid to the activities of the Russian Orthodox Church and the Muslim Ummah (community) in the territory of the Republic of Mordovia as the most influential denominations in the region. These denominations have established close relationships and diverse social partnership with government agencies of Mordovia. The author shows that the main problems of religious life of the Republic of Mordovia are: attempts to spread Wahhabism in the republic, as well as the rivalry of individual spiritual administrations of Muslims. However, in general, ethno-confessional situation in the Republic of Mordovia in early 2000s - mid 2010s, has been characterized as stability.
Reconstructed 3D foot models can be used for 3D printing and further manufacturing of individual orthopedic shoes, as well as in medical research and for online shoe shopping. This study presents a ...technique based on the approach and algorithms of photogrammetry. The presented technique was used to reconstruct a 3D model of the foot shape, including the lower arch, using smartphone images. The technique is based on modern computer vision and artificial intelligence algorithms designed for image processing, obtaining sparse and dense point clouds, depth maps, and a final 3D model. For the segmentation of foot images, the Mask R-CNN neural network was used, which was trained on foot data from a set of 40 people. The obtained accuracy was 97.88%. The result of the study was a high-quality reconstructed 3D model. The standard deviation of linear indicators in length and width was 0.95 mm, with an average creation time of 1 min 35 s recorded. Integration of this technique into the business models of orthopedic enterprises, Internet stores, and medical organizations will allow basic manufacturing and shoe-fitting services to be carried out and will help medical research to be performed via the Internet.
Single crystals of new ternary bismuthides NaZnBi (
I
) and NaCdBi (
II
) are obtained by the self-flux technique. Its crystal structures are studied by single-crystal X-ray structure analysis (CIF ...file CCDC nos. 1956988 (
I
) and 1956989 (
II
)). The synthesized compounds form isostructural series with lighter pnictide analogs. Similarly to NaZnPn (
Pn
= P, As, Sb), compound
I
crystallizes in the structural type PbFCl, space group
P
4/
nmm
,
a
= 4.5114(5),
c
= 7.5970(10) Å, whereas compound
II
, as NaCdPn (
Pn
= As, Sb), can be assigned to the structural type MgSrSi, space group
Pnma
,
a =
8.0812(5),
b =
4.8026(3),
c =
8.7320(7) Å
.
The crystal structure of compound
I
consists of antifluorite-like layers ZnBi separated by a layer of sodium atoms, whereas hexagonal corrugated CdBi layers, which are tightened between each other by Cd
–
Bi bonds with the formation of channels in which sodium atoms are localized, can be distinguished in the structure of compound
II
. The crystal structures of the synthesized bismuthides are compared both between each other and with lighter representatives of the isostructural series.
The Sm
O
-Y
O
-HfO
system holds promise for applications in the sphere of high-temperature technologies, particularly the development of ultra-high-temperature ceramics. However, the reliability of ...refractory materials is dependent on the possible selective vaporization of their components leading to changes in their physicochemical properties. Thus, information about vaporization processes and thermodynamic properties of ceramics based on the Sm
O
-Y
O
-HfO
system may be of importance for the production of high-temperature materials as well as for the prediction of the physicochemical properties of ultra-high-temperature ceramics.
The Knudsen effusion mass spectrometric method was used, with an MS-1301 magnetic mass spectrometer equipped with a tungsten twin effusion cell used to examine the samples in the Sm
O
-Y
O
-HfO
system. Electron ionization of vapor species effusing from the cell was carried out at an ionization energy of 25 eV.
It was shown that at a temperature of 2373 K, selective vaporization of Sm
O
and Y
O
occurred in the samples of the Sm
O
-Y
O
-HfO
system, with the main vapor species being SmO, Sm, YO, and O. The partial pressures of these vapor species were obtained by the ion current comparison method. The Sm
O
activities in the Sm
O
-Y
O
-HfO
system were determined and allowed the evaluation of the excess Gibbs energies at 2373 K. The direction of change of the condensed phase of the samples because of selective vaporization of the components was examined.
The Sm
O
-Y
O
-HfO
system was characterized by negative deviations from the ideal behavior at 2373 K. The excess Gibbs energies evaluated in the present study were approximated using the Redlich-Kister representation and visualized in the form of curves of constant values in the concentration triangle. The data obtained in the Sm
O
-Y
O
-HfO
system were optimized using the Barker-Guggenheim theory of associated solutions.
A comprehensive study of superconducting properties of underdoped NaFesub.0.979Cosub.0.021As single crystals by a combination of upper critical field measurements and incoherent multiple Andreev ...reflection effect (IMARE) spectroscopy is presented. The Hsub.c2(T) temperature dependences are measured at magnetic fields up to 16 T with in-plane and out-of-plane field directions and considered within single-band and two-band models in order to estimate the Hsub.c2(0) value. In IMARE spectroscopy probes, the magnitude, characteristic ratio, and temperature dependence of the superconducting order parameters (Δsub.L,S(T)) are determined locally and directly. A possible k-space anisotropy of the large superconducting gap is demonstrated. We show that usage of a quadruple of λsub.ij sup.0 coupling constants obtained in the IMARE experiment can significantly reduce the number of free parameters required to fit the Hsub.c2(T) dependence within a two-band approach (from six to two).
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