On Constructing Quasi-Optimal Robust Systems
For a mult i-mode control plant, a system of equations is obtained so thai its solution helps construct a robust controller that ensures the quality of system functioning close to optimal for the normal mode and acceptable availability for the emergency mode. An approximate method to solve this problem is given.
In the book, the authors collected the richest history material from the funds of the regional, city and family archives of relatives and living witnesses to the formation of ambulance stations in Kostroma. History and memories can be interesting to doctors, historians, social activists and everyone involved in the history of the Ambulance station of Kostroma.
In modern world, organizations, both in business and in the humanitarian sphere, have to look for the ways to improve their efficiency. As a result logistics has become a crucial factor for the competitiveness of commercial companies. Now it is getting more importance for humanitarian organizations as well. The article is dedicated to the specifics of logistics in humanitarian sphere. The authors study the disaster cycle and define its main stages: ramp-up, maturity and ramp-down. For each of the stages they highlight goal of logistics, typical problems as well as specifics of the logistics processes organization. The results of the comparative analysis have shown major distinctions between humanitarian logistics and the commercial one. Criteria for the comparison included such factors as the primary objective, types of stakeholders, presence of clear division of functions and responsibilities between supply chain participants, structure of logistics activity, type of promotional strategy, specifics of the new product development, requirements for production/operations, peculiarities of inventory management, etc. The study is based on case analysis and review of the foreign bibliography. The research has revealed potential areas for exchange of experience and best practices between commercial entities and humanitarian organizations. Thus, companies might take advantage of the humanitarian supply chains strengths including flexibility, swift reaction, ability to form partnerships and alliances, making use of local suppliers in order to reduce lead times, open information exchange between all the parties involved. The authors show that strategic partnership proved to be one of the most effective organizational forms for mutual training of commercial and humanitarian supply chains participants.
The article deals with the social research methods of the crises of the physical environment provoked by natural, biological and technological factors. These crises are united by the rising hybridity of social and physical phenomena.
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.