Стратегическое управление на ж.д. транспорте
The relevance of the study is due to the increasing intensity of train traffic on the Russian railways. By virtue of this, a rapid restoration of railway automation (RAT) devices is required. For this purpose, diagnosis and monitoring systems (STDM) of RAT are being introduced on the Russian railways. However, STDM does not automatically locate each of the possible fault up to a removable element, and need to be supplemented with optimal fault location algorithms (AFL) performed by the engineering servicing personnel. The purpose of the article is to develop practical methods for development such algorithms. First of all, for RAT devices built on modern elemental base, which makes it possible to use logical models for solving problems of their diagnosis. We found the features of such devices, which made it possible to overcome the dimension problem when constructing AFL for complex RAT devices. RAT devices is not limited the scope of use the obtained results. The materials of the article will be useful to specialists dealing with technical diagnostics, postgraduate students and students specialty "Automatics and communication in railway transport" and students of similar areas of training in technical universities.
The article analyzes the state of competition in the services market of railway rolling stock operators. The level of competition was estimated using the concentration index and the Herfindahl-Hirschman index for the services market for freight car operators in general, as well as separately for markets for gondola cars, tanks, covered wagons, platforms, etc. It was concluded that there was competition in these markets, and grouping of markets by the criterion of high, medium and low concentration of sellers.
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.