Multi-Agent Systems for E-Commerce

The article focuses on multi-agent systems (MAS) and domains that can benefit from multi-agent technology. In the last few years, the agent based modeling (ABM) community has developed several practical agent based modeling toolkits that enable individuals to develop agent-based applications. The comparison of agent-based modeling toolkits is given. Multi-agent systems are designed to handle changing and dynamic business processes. Any organization with complex and distributed business processes can benefit from multi-agent technology. The model of the E-commerce Platform targeted at online trading and auction systems, e-markets and private trading exchanges is presented

Local damages during rolling and mechano-rolling fatigue for the mechanical system shaft : roller (0.45 carbon steel – 25XGT steel, 20XH3A steel – 20XH3A steel)

The report provides a description of local damages which are formed in the process of wear-fatigue tests. The analysis of local surface wave-like damages during rolling and mechano-rolling fatigue for the shaft-roller mechanical system under steady-state and multistage loading conditions is given. It is shown that the study of local wear-fatigue damage was made possible by new methods of testing and measuring wear-fatigue tests and damages, which are described in the report. New characteristics to estimate the parameters of the local wear-fatigue damage are proposed. The concept of local fatigue curves is introduced. The laws of local wear-fatigue damage for the shaft - roller system are analysed

Creation of AlSi12 Alloy Coating by Centrifugal Induction Surfacing with the Addition of Low-Melting Metals

This paper investigates the structure and mechanical characteristics of a coating based on an AlSi12 alloy, obtained by centrifugal induction surfacing as an alternative to a bronze sliding bearing. To provide for the adhesion of an aluminum layer to the inner surface of a steel bearing housing, a sublayer of low-melting metals was formed, while the formation of the main layer and the sublayer was done in a single processing cycle. The low-melting metals had higher density, which ensured that the sublayer was created at the interface with the steel bearing housing under the action of centrifugal forces. It is shown that the low-melting sublayer forms a strong bond both with the aluminum alloy and with the steel base. Lead and tin are used as low-melting additives. It has been established that lead or tin used in a sublayer are indirectly involved in the structural formation of boundary layers of steel and aluminum claddings, acting as a medium for diffuse mass transfer. Thus, lead is not included in the composition of the main coating and does not change the chemical composition of the aluminum layer. After the addition of tin, the aluminum develops a dendritic structure, with tin captured in the interdendritic space. In this case, the deposited layer is saturated with iron with the formation of intermetallic (Fe, Al, Si) compounds, both at the interface and in the coating volume. This paper offers an explanation of the mechanism through which Pb and Sn act on the structure formation of the coating, and on the boundary layer of the steel bearing housing. Tribological tests have shown that the resulting materials are a promising option for plain bearings and highly competitive with the CuSn10P bronze

АНАЛИЗ СОСТОЯНИЯ ЗДОРОВЬЯ ГРАЖДАН, ПРИБЫВАЮЩИХ ДЛЯ КОМПЛЕКТОВАНИЯ СОЕДИНЕНИЙ И ЧАСТЕЙ БАЛТИЙСКОГО ФЛОТА

Addressed in the present paper are current problematic issues of medical examination and selection of young recruits to Baltic Fleet. Novel armory introduced in Navy raises increasingly strict requirements to the health conditions of servicemen. At the same time, there is a trend to more health problems, including psychological ones, among recruits. Therefore, adequate health control of recruits plays a fundamental role in Navy. The currently operating system of medical and psychological selection of recruits ensures that Navy is manned with adequate personnel.В статье обсуждаются проблемные вопросы медицинского обследования и совершенствования системы отбора молодого пополнения, поступающего для комплектования соединений и частей Балтийского флота на современном этапе. В условиях оснащения Вооруженных сил Российской Федерации новыми образцами вооружения и техники возрастают требования к состоянию здоровья военнослужащих. Наметившиеся тенденции свидетельствуют о проблемной ситуации в состоянии здоровья призываемого контингента, в том числе здоровья психологического. Качественный медицинский контроль поступающего в войска контингента приобретает основополагающую роль. Сформированная на флоте система медицинского и психологического отбора призывников позволяет качественно проводить комплектование сил (войск) флота