Влияние ночной расстановки составов на режим работы электроподвижного состава метрополитена
A train schedule problem consists of some steps: compilation and analysis of source data, requirements formation of a volume traffic in dependency time of a day, requirements maintenance of electric motive power, which determinate necessity for combined generating of train schedule with maintenance schedule. One of the task, which heavy determinate on a procedure automated generating of train schedule combined with maintenance schedule, is solving of trains night stay problem. This article shows some mathematical provision of solving problem of generation all possible variants of trains night stay on station layout. Authors give propose an attitude based of using graph theory for formalization object and finding solution. The devise of algorithmic conforming can be using for station with free configuration of gridiron described by planar graph. It is show that implemented algorithms are (tree construction and sealing of the graph) equivalent veracity of isomorphism graph structure. Balance of the work it is not only program product, it is represent determinate algorithm and method of formalization definition gridiron.
Use of cloud computing applications and services requires review and adaptation of existing formal models for informational telecommunication systems security. It is necessary to consider the benefits of cloud deployment models and provide the procedure for allocating process among components of cloud computing environment for achieving confidentiality and data protection.
The main project of Philoponus on the eve of 553 was a reinterpretation of the Chalcedonian “unique hypostasis” as a particular nature, which would open the way to allow the official Church under Justinian to adopt the basic assumptions of Severian Christology. We see the Chalcedonian position that there is no such thing as a particular nature which is not identical to the hypostasis staggered precisely in the middle of the sixth century. This is the historical context in which Leontius’ change of mind would seem most natural – especially if he did really keep his Origenistic skeleton in the closet.
A model for organizing cargo transportation between two node stations connected by a railway line which contains a certain number of intermediate stations is considered. The movement of cargo is in one direction. Such a situation may occur, for example, if one of the node stations is located in a region which produce raw material for manufacturing industry located in another region, and there is another node station. The organization of freight traﬃc is performed by means of a number of technologies. These technologies determine the rules for taking on cargo at the initial node station, the rules of interaction between neighboring stations, as well as the rule of distribution of cargo to the ﬁnal node stations. The process of cargo transportation is followed by the set rule of control. For such a model, one must determine possible modes of cargo transportation and describe their properties. This model is described by a ﬁnite-dimensional system of diﬀerential equations with nonlocal linear restrictions. The class of the solution satisfying nonlocal linear restrictions is extremely narrow. It results in the need for the “correct” extension of solutions of a system of diﬀerential equations to a class of quasi-solutions having the distinctive feature of gaps in a countable number of points. It was possible numerically using the Runge–Kutta method of the fourth order to build these quasi-solutions and determine their rate of growth. Let us note that in the technical plan the main complexity consisted in obtaining quasi-solutions satisfying the nonlocal linear restrictions. Furthermore, we investigated the dependence of quasi-solutions and, in particular, sizes of gaps (jumps) of solutions on a number of parameters of the model characterizing a rule of control, technologies for transportation of cargo and intensity of giving of cargo on a node station.
Event logs collected by modern information and technical systems usually contain enough data for automated process models discovery. A variety of algorithms was developed for process models discovery, conformance checking, log to model alignment, comparison of process models, etc., nevertheless a quick analysis of ad-hoc selected parts of a journal still have not get a full-fledged implementation. This paper describes an ROLAP-based method of multidimensional event logs storage for process mining. The result of the analysis of the journal is visualized as directed graph representing the union of all possible event sequences, ranked by their occurrence probability. Our implementation allows the analyst to discover process models for sublogs defined by ad-hoc selection of criteria and value of occurrence probability
Existing approaches suggest that IT strategy should be a reflection of business strategy. However, actually organisations do not often follow business strategy even if it is formally declared. In these conditions, IT strategy can be viewed not as a plan, but as an organisational shared view on the role of information systems. This approach generally reflects only a top-down perspective of IT strategy. So, it can be supplemented by a strategic behaviour pattern (i.e., more or less standard response to a changes that is formed as result of previous experience) to implement bottom-up approach. Two components that can help to establish effective reaction regarding new initiatives in IT are proposed here: model of IT-related decision making, and efficiency measurement metric to estimate maturity of business processes and appropriate IT. Usage of proposed tools is demonstrated in practical cases.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.