scispace - formally typeset
Search or ask a question
Author

Dmitry Vasiliev

Bio: Dmitry Vasiliev is an academic researcher from Saratov State Technical University. The author has contributed to research in topics: Optimization problem & Microgrid. The author has an hindex of 1, co-authored 2 publications receiving 3 citations.

Papers
More filters
Book ChapterDOI
10 Dec 2018
TL;DR: Rolling-stock control systems allow getting information about characteristic quantity in the regime of real-time and consequently form an adaptive transportation strategy for electric passenger transport and gives a possibility of justified changes in interstation distance in case competition terms of providing interstation intervals of rolling-stock passenger service quality are observed.
Abstract: Modern approaches to development and management of passenger transportation include aspects of efficient electricity consumption in line with “open sky” concept, and intelligent logistics. Both scientific community and empiricists agree upon the importance of including intelligent models in management of studied systems and their elements as well as in forecasting their operational characteristics. Intelligence of these systems is defined by the existence of technical and technological solutions in the sphere of artificial intellect. Communication systems and networks provoke the dynamic evolution of transport and logistics practically in all directions which allows effectively managing power flows functioning in them. Models designed to calculate electricity consumption of trams and trolleys are based on the assumptions about passenger traffic being constant, which, in our view, needs correction and clarification. Rolling-stock control systems allow getting information about characteristic quantity in the regime of real-time and consequently form an adaptive transportation strategy for electric passenger transport. Academic and research approach to tackling this problem means to design forecast models of passenger traffic flows using artificial neural networks and based on them adaptive selection and adjustment of passenger capacity according to the respective dynamics. In the process of developing route descriptor, this gives a possibility of justified changes in interstation distance in case competition terms of providing interstation intervals of rolling-stock passenger service quality are observed.

4 citations

Book ChapterDOI
03 Dec 2020
TL;DR: In this article, the minimum length of power transmission lines from generating equipment to consumers and the degree to which consumers' powers in load centers conform to powers of supplying them group hybrid microgrids are considered.
Abstract: A class of architectures, called group hybrid microgrid, is identified within the framework of the system approach. The connection between components of hybrid microgrids of these groups is realized by a common DC bus. Functions of inversion, accumulation and reservation by diesel generators are given to the corresponding equipment of only one hybrid microgrid. A selection algorithm of variants for decomposition of a power supply system, based on group hybrid microgrid, according to two criteria has been developed. These criteria are the minimum length of power transmission lines from generating equipment to consumers and the degree, to which consumers’ powers in load centers conform to powers of supplying them group hybrid microgrids. It is proposed to use an optimization assignment model, formulated as a Boolean linear programming model, to solve this problem. The mechanism for solution of this optimization problem, which used the genetic algorithm with the replacement of several criteria with single super criterion, is described. At the same time a procedure for the formation of a fuzzy version of the constraint mechanism is developed. An example of the problem solution with given numbers of hybrid microgrids and load centers is considered. The smallest values of criteria, obtained for different results of the decomposition of the initial hybrid microgrids’ set, are shown as a result of using of proposed algorithms.

1 citations

Journal ArticleDOI
TL;DR: The importance of bioeconomics in the process of increasing the sustainability of industrial fishing from a historical perspective and the accumulated scientific baggage on the problem under consideration is discussed in this paper .
Abstract: The concept of bioeconomics was introduced into the practice of marine use by the UN Conference on Environment and Development in Rio de Janeiro (1992). Since that moment, bioeconomics has been considered as an important direction of the concept of sustainable development. As evidenced by foreign practice, bioeconomics has been developing in the last decade within the framework of the "blue" economy concept. The purpose of this article is to show the importance of bioeconomics in the process of increasing the sustainability of industrial fishing from a historical perspective and to discuss the accumulated scientific baggage on the problem under consideration, which allows us to move to the advanced development of industrial fishing.

Cited by
More filters
Journal ArticleDOI
TL;DR: In this article , the authors developed a method for the formation of a competitive strategy for a transport and logistics company, which is based on an analysis of the macro and microenvironment and the choice of appropriate research tools on the basis of the structural-logical filtering of external and internal factors.
Abstract: The purpose of the study is to develop a method for the formation of a competitive strategy for a transport and logistics company. The study found that the existing classifications of the competitive advantages of transport and logistics companies do not contain a number of important classification features that characterize their length in time, the degree of complexity and sustainability, and also do not take into account some sources of competitive advantages. The result of the study is the obtained method for monitoring the process of forming a competitive strategy for a transport and logistics company, which is based on an analysis of the macro and microenvironment and the choice of appropriate research tools on the basis of the structural-logical filtering of external and internal factors.

3 citations

Book ChapterDOI
10 Dec 2019
TL;DR: The elaboration of the suggested approaches involves traditional and modern management models, including the models for estimating the entropy of the logistics system and the entropic model, which consists of the calculation of parameters of adaptation of the type, structure and properties of the available charging stations on the city road network.
Abstract: Modern approaches to organization and management of an urban energy system deal with the optimal placement of charging stations for electric cars and other vehicles, that have dynamic charging while driving. The electric power flows are allocated between the consumers and must be taken into account in logistics network model under study in order to ensure sustainable and stable generation of energy for the urban transportation. Integration of different functional areas into the process of power supply of electric vehicles allows to optimize the total expenses for the city transportation service. The energy aspects of functioning of logistics systems are directly related to the problems of environmental protection in cities and locations of energy sources concentration. The distribution and redistribution of the energy power flows are an urgent applied research task, which is emerging as a promising work in the field of design of deployment models of electric charging stations on the city road network. The elaboration of the suggested approaches involves traditional and modern management models, including the models for estimating the entropy of the logistics system. The entropic model consists of the calculation of parameters of adaptation of the type, structure and properties of the available charging stations on the city road network. Planning of placement and layouts of charging stations is carried out after the final stage in calculating the parameter of organization of functioning of the analyzed resource-supplying logistics network. The total result and planned economic parameters of the charging stations should be measured and controlled.

2 citations

Journal ArticleDOI
TL;DR: In this paper, the authors identify the most problematic development hurdles and their comprehensive overcoming in the context of digital transformation of residential development projects, which contributes to effective demand, optimizes the distribution of risk between construction work participants and expands the use of preventive mechanisms for the out-of-court settlement of commercial disputes arising in the construction sector.
Abstract: Abstract Introduction. The unwanted slowdown of the housing construction process, triggered by the coronavirus crisis, does not cancel the tasks set by the national project “Housing and the Urban Environment”. The practical analysis of the housing sector has confirmed that the economic recovery of the housing construction industry cannot be regarded as an outcome of inconsistent measures. The novelty of the approach lies in the identification of the most problematic development hurdles and their comprehensive overcoming in the context of digital transformation of residential development projects, which contributes to effective demand, optimizes the distribution of risk between construction work participants and expands the use of preventive mechanisms for the out-of-court settlement of commercial disputes arising in the construction sector. Materials and methods. A quick analysis of the current situation in the housing sector, including the one in the regions, has identified the most important factors hindering the growth of business activities in this industry. Methods of systems analysis, adjusted in terms of time and space, made it possible to apply situational analysis tools to the housing construction sector. Results. A repeated discussion of the reasons for the contraction of housing construction which is underway on discussion platforms of the Ministry of Construction of the Russian Federation, NOSTROY, RANEPA, MGSU, etc. has revealed that the comprehensive implementation of aggregated effects that accompany the transition to project funding is impossible without the implementation of the principle of “risk symmetry”, effective demand support, prevention of conflicts of interests between construction participants and the practical implementation of the potential of digital transformation of investment and construction processes in the project format at all stages of the life cycle of a construction project. Conclusions. The nurture of a qualitatively new digital environment in the housing sector will change not only its planning, controlling and expert functions, but also the evaluation and communication mechanisms, as it contributes to reduction of transaction and operational costs, boosts the efficiency and objectivity of construction control, increases trust and partnership solidarity, narrows the scope of litigation and reduces the number of bankruptcies, etc., thus, setting the stage for an accelerated recovery and growth of the housing construction.
Journal ArticleDOI
01 Dec 2021
TL;DR: In this paper, the authors propose a recommendation system that offers to form a package of services in the delivery and assembly of a batch of orders based on the established preferences of other customers and users of the services.
Abstract: Modern approaches to the organization and management of logistics operators include issues directly related to the forecasting of the dynamics of the processes of the company under study, as well as the development of recommendations for further functioning in the market of goods and services. Services integrated into the order and delivery logistics system are an integral part of it and accompany the flow processes throughout the supply chain. Nowadays, the complex of information technologies, communications and technological solutions allows implementing the most daring offers of logistics companies. Innovative solutions developed using information technologies develop the complex “design-practical implementation” in logistics systems and form a digital space for managing material flows. The calculation of the forecast values of the indicators that characterize the order requires research from the point of view of taking into account the already known preferences of customers. We are talking about recommendation systems that offer to form a package of services in the delivery and assembly of a batch of orders based on the established preferences of other customers and users of the services. The well-known preferences of customers when accessing logistics services form the basis for developing recommendations that are close to them. The obtained data of forecasts of the state of the system under study should provide an opportunity to develop an individual package of solutions, based on the already known preferences of other users. The key value is the information that is used in this model to build forecasts. The practice of finding solutions in the management of order procedures in logistics is an analysis of the key problems and “problem points” that affect the overall performance indicator, taking into account the geography of transport systems, established trade practice, the characteristics of the markets studied and the location of each, specifically selected company.
Journal ArticleDOI
TL;DR: In this article , the problem of optimal location determining of several power stations in some region is addressed, and an algorithm for solving the optimal location selection problem of power stations consists of several stages.
Abstract: The paper proposes the problem solution of optimal location determining of several power stations in some region. These stations receive primary energy from renewable sources, such as solar panels and wind turbines. At the same time, the condition of the problem includes the availability of information on several perspective areas in this region for the placement of such power stations, as well as information of values and distribution of loads. The developed algorithm for solving of the optimal location selection problem of power stations consists of several stages. The content of the first stage of the algorithm is ranking of possible areas for the location of power stations using local criteria, which are proposed as the specific estimated cost of station arrangement, the remoteness of the proposed location of the power station from loads and settlements. The second stage of the algorithm consists in a set formation of possible areas for the location of stations. And at the final stage of the algorithm, they are ranked using system criteria that evaluate these sets of areas for the location of power stations as a power supply system. The estimated cost of a power supply system arrangement based on power stations, located on areas of the rated set, the specific estimated cost of power stations arrangement, applied to the set of power stations with power lines as an autonomous power supply system, as well as the average rating of areas are proposed as system criteria. In this case, the decision maker, after familiarizing with values of system criteria, sets critical boundaries for each of them. The result of the algorithm is a certain totality of prospective sets for the location of several power stations in a given region, estimates of which according to system criteria are the best correspond to preferences of the decision maker. A feature of the proposed approach is the participation of the decision maker at all stages of design.