MATHEMATICAL MODEL FOR EVALUATING THE EFFICIENCY OF FOREST MANAGEMENT TAKING INTO ACCOUNT THE LEVEL OF DEVELOPMENT OF THE TRANSPORT NETWORK BASED ON AN INTEGRATED APPROACH

2020 ◽  
pp. 151-155
Author(s):  
R.N. KOVALEV ◽  
◽  
I.M. ENALEEVA-BANDURA ◽  
A.N. BARANOV ◽  
V.A. IVANOV ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Forest Management ◽  
Integrated Approach ◽  
Transport Network

scholarly journals Optimization of Stochastic Lossy Transport Networks and Applications to Power Grids

2021 ◽  
Author(s):  
Alessandro Zocca ◽  
Bert Zwart
Keyword(s):  
Mathematical Model ◽  
Renewable Energy ◽  
Smart Grids ◽  
Transport Network ◽  
Power Grids ◽  
Performance Gain ◽  
Power Losses ◽  
Transport Networks ◽  
Trade Off ◽  
Stochastic Load

Motivated by developments in renewable energy and smart grids, we formulate a stylized mathematical model of a transport network with stochastic load fluctuations. Using an affine control rule, we explore the trade-off between the number of controllable resources in a lossy transport network and the performance gain they yield in terms of expected power losses. Our results are explicit and reveal the interaction between the level of flexibility, the intrinsic load uncertainty, and the network structure.

scholarly journals FORMALIZATION OF AN INTEGRATED APPROACH TO THE FORMATION AND MANAGEMENT OF FLEXIBLE ASSOCIATIONS OF CORPORATE STRUCTURES

2020 ◽  
pp. 7-17
Author(s):  
Volodymyr Baihushev ◽  
Liudmyla Holovkova
Keyword(s):  
Mathematical Model ◽  
Integrated Approach ◽  
Market Environment ◽  
Business Structures ◽  
Bounded Sets

Subject. The process of developing and researching the synthesis of a conceptual mathematical model for the formation and management of flexible unified corporate structures in an uncertain market environment. Purpose of work. Create and research a mathematical model for the formation and management of flexible integrated corporate structures in an uncertain market environment. Methodology of the work. The theory of bounded sets measurable in the Lebesgue theory for the formation and management of organizational business structures. Result of work. A conceptual mathematical model is developed for the formation and management of flexible unified corporate structures in an uncertain market environment, and the results of development and calculations are presented. Scope. It is used in the development of projects for the formation and managing combined corporate structures in an uncertain market environment for regulatory and flexible business areas. Conclusion. Created a conceptual mathematical model for the formation and management of flexible unified corporate structures in an uncertain market environment.

scholarly journals Optimization of Parking Public Transport Vehicles in Ostrava

2015 ◽  
Vol 27 (1) ◽  
pp. 69-75 ◽  
Author(s):  
Dušan Teichmann ◽  
Michal Dorda ◽  
Helena Bínová ◽  
Martin Ludvík
Keyword(s):  
Mathematical Model ◽  
Public Transport ◽  
Transport Network ◽  
Parking Lots ◽  
Total Length

A typical trait of public transport is a spatially scattered demand. A route net that is operated by a carrier (or several carriers) has to be adapted to the demand. Public transport vehicles that are not used during a period of a day are usually parked in defined parking lots that have a given capacity. When the vehicle goes from the place where its schedule ends (usually a terminus of the last connection served by the vehicle) to the place where the vehicle should be parked, a non-productive journey occurs. The same occurs at the beginning of the vehicle schedule as well. The main goal of the paper is to present a mathematical model that enables minimization of the total length of all the non-productive journeys. Functionality of the proposed mathematical model was tested in the conditions of a real bus public transport network.

Supply Chain Design of Manufacturing Processes with Blending Technologies

2017 ◽  
Vol 261 ◽  
pp. 509-515 ◽  
Author(s):  
Ágota Bányainé Tóth ◽  
Béla Illés ◽  
Fabian Schenk
Keyword(s):  
Mathematical Model ◽  
Linear Programming ◽  
Supply Chain ◽  
Literature Review ◽  
Linear Programming Problem ◽  
Integrated Approach ◽  
Integrated Model ◽  
Supply Chain Design ◽  
Manufacturing Processes ◽  
Proposed Model

Blending technologies play an important role in manufacturing. The design and operation of manufacturing processes using blending technologies represent a special range of manufacturing related logistics because the integrated approach of technological and logistic parameters is very significant. This research proposes an integrated model of supply of manufacturing processes using blending technologies. After a careful literature review, this paper introduces a mathematical model to formulate the problem of supply chain design for blending technologies. The integrated model includes the optimal purchasing strategy depending on the characteristics of components to be mixed in the desired proportion and the costs of supply. The integrated model will be described as a linear programming problem. Numerical results with different datasets demonstrate how the proposed model takes technological and logistic aspects into consideration.

scholarly journals Forest resources of the Far East, their use and reproduction

2020 ◽  
Vol 203 ◽  
pp. 03003
Author(s):  
Andrey Komin ◽  
Pavel Komin ◽  
Vladimir Usov ◽  
Alexander Gridnev
Keyword(s):  
Forest Management ◽  
Forest Fires ◽  
Far East ◽  
Federal District ◽  
Integrated Approach ◽  
Forest Resources ◽  
Factors Affecting ◽  
Time Required ◽  
The Cost ◽  
Far Eastern

The paper provides an assessment of the state of forest resources in the Far Eastern Federal District and identifies the main factors affecting the qualitative state of forests. The reasons contributing to the increase in the area of forest fires are analyzed. One of the reasons contributing to the degradation of forest areas is also indicated - the accepted allowable cut, which does not always correspond to reality due to the use of outdated forest husbandry materials and its untimely implementation. Considering the issues of forest reproduction, an integrated approach is proposed for carrying out reforestation activities, including both the creation of forest plantations and the implementation of measures aimed at observing the technology of logging operations and preserving undergrowth. This will reduce the cost of reforestation work, as well as reduce the time required for the transfer of forest crops to a forested area. One of the conclusions is a change in the fundamental approaches to forest management in this area, taking into account the observance of environmental, economic and social requirements for forest management.

INTEGRATED APPROACH FOR SELECTING THE EFFECTIVE SCHEME FOR PREPARING THE MINING FIELD

2020 ◽  
Vol 3 (1) ◽  
pp. 100-112
Author(s):  
A.A. BELODEDOV ◽  
◽  
D.N. SHURYGIN ◽  
Keyword(s):  
Mathematical Model ◽  
Coal Seam ◽  
Production Capacity ◽  
Economic Assessment ◽  
Integrated Approach ◽  
Coal Production ◽  
Capital Investments ◽  
Mine Field ◽  
Current State

The analysis is carried out and the problems of the current state of mining in the coal mines of the Russian Donbass are identified. To increase the efficiency of their work, it is proposed to create a mathematical model that allows tracing the probable zones of tectonic disturbance. We apply this technique for the southeastern wing of the inclined part of the mine field of the Sadkinskaya mine. On the basis of the constructed forecast map of coal seam disturbance, we solve the problem of choosing the optimal cutting of a section of a mine field. To do this, we make a technical and economic assessment taking into account such factors as: losses and quality of mined coal, production capacity of the mine and time for preparation and development, volume of capital investments, cost, taking into account costs when crossing disturbed zones.

Integrated Approach for Multi-Robot Spot-Welding Cell Design and Welding-Point Allocation

2013 ◽  
Vol 572 ◽  
pp. 648-651 ◽  
Author(s):  
Stefania Pellegrinelli ◽  
Nicola Pedrocchi ◽  
Lorenzo Molinari Tosatti ◽  
Tullio Tolio
Keyword(s):  
Mathematical Model ◽  
Spot Welding ◽  
Integrated Approach ◽  
Robot Motion ◽  
Test Case ◽  
Robot Motion Planning ◽  
Cell Design ◽  
Cell Cycle Time ◽  
Probabilistic Roadmaps ◽  
Multi Robot

The design of multi-robot cells for spot welding strictly influences the feasibility and complexity of the multi-robot motion planning. In comparison to existing literature, the proposed approach simultaneously addresses: (i) the design of multi-robot cells for spot welding; (ii) the allocation of the welding points to the robots on the basis of required cell cycle time. First, the algorithm selects one robot model and one robot fixturing structure. Second, the approach identifies free trajectories among welding points for each couple gun/position of the robot in the fixturing structure through probabilistic roadmaps (PRMs). Third, on the basis of the previous results, an innovative mathematical model selects and allocates the resources taking into account cell investment costs. Finally, the solutions that differ on robot model and robot fixturing structure are compared and the best solution is selected. A test case is provided to show the applicability of the approach.

scholarly journals Algorithm for dynamic route assignment in complex street layouts

2019 ◽  
pp. 37-40
Author(s):  
М.В. Деркач ◽  
І.С. Скарга-Бандурова
Keyword(s):  
Mathematical Model ◽  
Public Transport ◽  
Graph Model ◽  
Transport Network ◽  
Key Points ◽  
Routing Techniques ◽  
Dynamic Route ◽  
Street Layouts

In some scenarios, public transport vehicles do not have permanently fixed routes that make it hard to implement optimal automatic routing techniques and use forecasting algorithms. To solve the problem of route destination, a mathematical model of the dynamic route assignment is developed. It is based on the graph model of the street layouts and includes the results of the arrival of vehicles in certain points. The proposed algorithm enables to dynamically recalculate the routes, depending on the intersection of the four types of nodes representing the key points of the transport network. A case study for the route assignment in city of Severodonetsk is discussed.

scholarly journals MATHEMATICAL MODEL OF ENERGY EFFICIENCY OF MECHATRONIC MODULES AND POWER SOURCES FOR PROSPECTIVE MOBILE OBJECTS

2019 ◽  
Vol 16 (32) ◽  
pp. 529-541
Author(s):  
Ekaterina L. KUZNETSOVA ◽  
Alexander V. MAKARENKO
Keyword(s):  
Mathematical Model ◽  
Energy Efficiency ◽  
Primary Source ◽  
Integrated Approach ◽  
Scientific Paper ◽  
Power Source ◽  
Supply Source ◽  
Power Sources ◽  
Mobile Objects ◽  
Drive Systems

Intensive development of equipment contributes to a significant impact on the high level of competitiveness of new samples, improving technologies, and promise of enshrined ideas as well as resource intensity and time of their implementation. The relevance of the scientific paper lies in the fact that in the process of designing drive systems for guiding aviation equipment, one of the important elements is taking into account the limitations on the power source energy storage. The purpose of the scientific paper is to develop a mathematical model of energy efficiency of mechatronic modules and power sources for prospective mobile objects. An integrated approach is used to study the influence of structures and elements of storage devices on the characteristics of power sources in the interest of finding the ways to increase the energy efficiency of the entire drive system for guiding mechatronic modules of aviation systems in general. It has been determined that in order to reduce the weight-size parameters of the power supply source, the stabilizer in the power section, as a rule, is not set. It has been found out that power and information sections of drive systems differ from each other in terms of the stability of the energy coordinates. And stabilized parameters (potential, current) are necessary only for the information channel. With the help of analytical dependencies, the main parameters of the primary source were evaluated depending on the efficiency of the consumer, efficiency of the stabilizer and efficiency of the secondary power source. A method to study the influence of elements of the energy (power) channel on the output power of the power source the mechatronic modules for prospective aviation mobile objects (autonomous aviation drives, guided missiles, guided parachute systems) is being developed.

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