DEVELOPMENT OF THE MATHEMATICAL MODEL OF CARGO TRANSPORTATION CONTROL ON A RAILWAY NETWORK SEGMENT TAKING INTO ACCOUNT RANDOM FACTOR

Combined cargo transportation in Ukraine is characterized by the presence of uncertain risks. The aim of the article was to propose a mathematical model for choosing the mode of transportation that would correspond to the best value of the integral objective function in the presence of fuzzy, stochastic and uncertain risk parameters. The efficiency of the mathematical model provided the possibility of forming not only long-term forecasts that require significant time, but also short-term forecasts in real time. This allows to quickly change routes and conditions of transportation. Practical testing of the mathematical model revealed the assimilating nature of some uncertain risks. The results of the analysis are given in the article. The realization of such a risk leads to a radical change in all conditions of transportation. Long-term forecasts allow to predict new routes and conditions of transportation.

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ANALISIS STANDAR JUMLAH PERSONEL PENANGANAN PENGANGKUTAN BARANG BERBAHAYA DI BANDAR UDARA ADISUTJIPTO

Angkasa: Jurnal Ilmiah Bidang Teknologi ◽

10.28989/angkasa.v8i1.135 ◽

2017 ◽

Vol 8 (1) ◽

pp. 93

Author(s):

Gunawan Gunawan ◽

Rully Medianto

Keyword(s):

Mathematical Model ◽

Physical Examination ◽

Standard Procedure ◽

Air Cargo ◽

Type B ◽

X Ray ◽

Cargo Handling ◽

Dangerous Goods ◽

Cargo Transportation ◽

The Mathematical Model

Good and efficient Air cargo handling, especially for dangerous goods transportation need to be supported by licensed dangerous goods handling personnel and supported by the transport handling facilities as well as standard procedure. Comprehensive standards and procedures are required to reduce the risk of accidents caused by an error in the handling of the dangerous goods transportation. Main problems in this study: first, to analyse the process of air cargo transportation handling at the Adisutjipto Airport; second, to analyse the standard of the dangerous goods handling personel. The cargo handling process consists of Outgoing (Acceptance, weighing, Documentation, Marking & labeling, X-ray, Storage, Build-up, and Loading) and Incoming (Check Incoming Massage, Unloading, Breakdown, check lists, Physical Examination, Storage, Notice of Arrival, Delivered). The mathematical model of Dangerous Goods Handling Personnel Number Standard: DG Personel Cargo Agent Type A = c.% DG. (2,89 x 10^-2) DG Personnel Warehousing Type B = c.% DG (4,53 x 106-3), DG Personnel Airline Type B = c.%DG. (4,89 X 10^-4).

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Development of Rational Rail Network Topology for High-Speed and Conventional Trains Based on Bacterial Foraging Optimization

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.3.19790 ◽

2018 ◽

Vol 7 (4.3) ◽

pp. 217 ◽

Cited By ~ 1

Author(s):

Sergii Panchenko ◽

Tatyana Butko ◽

Аndrii Prokhorchenko ◽

Larisa Parkhomenko ◽

Oleg Zhurba

Keyword(s):

Mathematical Model ◽

Network Topology ◽

High Speed ◽

Flow Distribution ◽

Bacterial Foraging Optimization ◽

Railway Network ◽

Transportation Demand ◽

Bacterial Foraging ◽

Passenger Trains ◽

The Mathematical Model

Development of projects on higher speeds of passenger trains on the world railways requires investigation into the balanced combination of routes for high-speed and conventional trains considering railway network topology. The objective of the study is consideration of railway network peculiarities regarding transportation demand by designing a mathematical model to find an optimal passenger train flow distribution. In order to formalize the process of a simultaneous search for the rail passenger network topology and determination of the most probable distribution within the formed train flow network for high-speed and conventional trains it has been proposed to use a criterion as a system entropy adapted to the rail passenger-oriented transportation. The concept of entropy is based on isomorphism in systems, which allows monitoring and implementing the link between a micro and macro level in the passenger transportation system. To solve the mathematical model the authors have used an optimization method based on Bacterial Foraging Optimization (BFO). The implementation of the mathematical model based on BFO will make it possible to theoretically substantiate the efficiency of existing and promising projects on higher speeds of passenger trains on the rail transport regarding adaptation of the network topology to transportation demand.

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ECONOMIC AND MATHEMATICAL MODEL OF CONTAINER BLOCK-TRAINS

TECHNICAL SCIENCES ◽

10.26739/2181-9696-2021-3-5 ◽

2021 ◽

Vol 4 (3) ◽

pp. 30-36

Author(s):

Ziyoda Mukhamedova ◽

◽

Zakhro Ergasheva

Keyword(s):

Mathematical Model ◽

Container Terminal ◽

Point Of View ◽

Network Graph ◽

Railway Network ◽

Technological Capacity ◽

Cargo Transportation ◽

Step Algorithm ◽

Terminal Block ◽

Technological Model

The article is devoted to the study of the operation of the container terminal of the Tashkent-Commodity station during the turnover of the container block-train. An organizational and technological model of the container turnover in the form of a network graph is considered, and the technological capacity of the terminal is calculated by modeling operations with containers in the form of a step-by-step algorithm. The resulting methodology makes it possible to predict the duration of the turnover of a block-train and is a kind of imitation of the Uzbek railway network from the point of view of launching a container block-train.Keywords: cargo transportation, admission,delivery, loading, unloading, container, terminal, block-train, algorithm

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DETERMINATION OF PERFORMANCE INDICATORS OF THE TRUCK KrAZ-6510TE

Avtoshliakhovyk Ukrayiny ◽

10.33868/0365-8392-2020-1-261-19-26 ◽

2020 ◽

pp. 19-26

Author(s):

Olexandr Pavlenko ◽

Serhii Dun ◽

Maksym Skliar

Keyword(s):

Mathematical Model ◽

Surface Friction ◽

Building Structures ◽

Maximum Torque ◽

Military Equipment ◽

Military Vehicles ◽

Force Magnitude ◽

Vehicle Mobility ◽

The Mathematical Model

In any economy there is a need for the bulky goods transportation which cannot be divided into smaller parts. Such cargoes include building structures, elements of industrial equipment, tracked or wheeled construction and agricultural machinery, heavy armored military vehicles. In any case, tractor-semitrailer should provide fast delivery of goods with minimal fuel consumption. In order to guarantee the goods delivery, tractor-semitrailers must be able to overcome the existing roads broken grade and be capable to tow a semi-trailer in off-road conditions. These properties are especially important for military equipment transportation. The important factor that determines a tractor-semitrailer mobility is its gradeability. The purpose of this work is to improve a tractor-semitrailer mobility with tractor units manufactured at PJSC “AutoKrAZ” by increasing the tractor-semitrailer gradeability. The customer requirements for a new tractor are determined by the maximizing the grade to 18°. The analysis of the characteristics of modern tractor-semitrailers for heavy haulage has shown that the highest rate of this grade is 16.7°. The factors determining the limiting gradeability value were analyzed, based on the tractor-semitrailer with a KrAZ-6510TE tractor and a semi-trailer with a full weight of 80 t. It has been developed a mathematical model to investigate the tractor and semi-trailer axles vertical reactions distribution on the tractor-semitrailer friction performances. The mathematical model has allowed to calculate the gradeability value that the tractor-semitrailer can overcome in case of wheels and road surface friction value and the tractive force magnitude from the engine. The mathematical model adequacy was confirmed by comparing the calculations results with the data of factory tests. The analysis showed that on a dry road the KrAZ-6510TE tractor with a 80 t gross weight semitrailer is capable to climb a gradient of 14,35 ° with its coupling mass full use condition. The engine's maximum torque allows the tractor-semitrailer to overcome a gradient of 10.45° It has been determined the ways to improve the design of the KrAZ-6510TE tractor to increase its gradeability. Keywords: tractor, tractor-semitrailer vehicle mobility, tractor-semitrailer vehicle gradeability.

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EXPERIMENTAL STUDIES OF CAR PROPERTIES ON A PHYSICAL MODEL

Avtoshliakhovyk Ukrayiny ◽

10.33868/0365-8392-2019-4-260-10-16 ◽

2019 ◽

pp. 10-16

Author(s):

Oleksii Timkov ◽

Dmytro Yashchenko ◽

Volodymyr Bosenko

Keyword(s):

Mathematical Model ◽

Remote Control ◽

Physical Model ◽

Model Experiment ◽

Experimental Studies ◽

Electrical Energy ◽

Short Term ◽

Motor Current ◽

Memory Card ◽

The Mathematical Model

The article deals with the development of a physical model of a car equipped with measuring, recording and remote control equipment for experimental study of car properties. A detailed description of the design of the physical model and of the electronic modules used is given, links to application libraries and the code of the first part of the program for remote control of the model are given. Atmega microcontroller on the Arduino Uno platform was used to manage the model and register the parameters. When moving the car on the memory card saved such parameters as speed, voltage on the motor, current on the motor, the angle of the steered wheel, acceleration along three coordinate axes are recorded. Use of more powerful microcontrollers will allow to expand the list of the registered parameters of movement of the car. It is possible to measure the forces acting on the elements of the car and other parameters. In the future, it is planned to develop a mathematical model of motion of the car and check its adequacy in conducting experimental studies on maneuverability on the physical model. In addition, it is possible to conduct studies of stability and consumption of electrical energy. The physical model allows to quickly change geometric dimensions and mass parameters. In the study of highway trains, this approach will allow to investigate the various layout schemes of highway trains in the short term. It is possible to make two-axle road trains and saddle towed trains, three-way hitched trains of different layout. The results obtained will allow us to improve not only the mathematical model, but also the experimental physical model, and move on to further study the properties of hybrid road trains with an active trailer link. This approach allows to reduce material and time costs when researching the properties of cars and road trains. Keywords: car, physical model, experiment, road trains, sensor, remote control, maneuverability, stability.

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RESEARCH OF INDICATORS OF A VEHICLE WITH A DIESEL WORKING ON DIESEL AND DIESEL GAS CYCLES USING THE MATHEMATICAL MODEL

Avtoshliakhovyk Ukrayiny ◽

10.33868/0365-8392-2020-1-261-14-19 ◽

2020 ◽

pp. 14-19

Author(s):

Serhii Kovbasenko ◽

Andriy Holyk ◽

Serhii Hutarevych

Keyword(s):

Mathematical Model ◽

Diesel Engine ◽

Environmental Performance ◽

Energy Performance ◽

Dual Fuel ◽

Fuel System ◽

Compressed Natural Gas ◽

Diesel Vehicles ◽

Diesel Cycle ◽

The Mathematical Model

The features of an advanced mathematical model of motion of a truck with a diesel engine operating on the diesel and diesel gas cycles are presented in the article. As a result of calculations using the mathematical model, a decrease in total mass emissions as a result of carbon monoxide emissions is observed due to a decrease in emissions of nitrogen oxides and emissions of soot in the diesel gas cycle compared to the diesel cycle. The mathematical model of a motion of a truck on a city driving cycle according to GOST 20306-90 allows to study the fuel-economic, environmental and energy indicators of a diesel and diesel gas vehicle. The results of the calculations on the mathematical model will make it possible to conclude on the feasibility of converting diesel vehicles to using compressed natural gas. Object of the study – the fuel-economic, environmental and energy performance diesel engine that runs on dual fuel system using CNG. Purpose of the study – study of changes in fuel, economic, environmental and energy performance of vehicles with diesel engines operating on diesel and diesel gas cycles, according to urban driving cycle modes. Method of the study – calculations on a mathematical model and comparison of results with road tests. Bench and road tests, results of calculations on the mathematical model of motion of a truck with diesel, working on diesel and diesel gas cycles, show the improvement of environmental performance of diesel vehicles during the converting to compressed natural gas in operation. Improvement of environmental performance is obtained mainly through the reduction of soot emissions and nitrogen oxides emissions from diesel gas cycle operations compared to diesel cycle operations. The results of the article can be used to further develop dual fuel system using CNG. Keywords: diesel engine, diesel gas engine, CNG

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Glycemia monitoring

Nonlinear Analysis Modelling and Control ◽

10.15388/na.1998.2.0.15282 ◽

1998 ◽

Vol 2 ◽

pp. 23-30

Author(s):

Igor Basov ◽

Donatas Švitra

Keyword(s):

Diabetes Mellitus ◽

Mathematical Model ◽

Numerical Methods ◽

Differential Equations ◽

Blood Sugar ◽

Self Regulation ◽

Physiological System ◽

Non Linear ◽

The Mathematical Model

Here a system of two non-linear difference-differential equations, which is mathematical model of self-regulation of the sugar level in blood, is investigated. The analysis carried out by qualitative and numerical methods allows us to conclude that the mathematical model explains the functioning of the physiological system "insulin-blood sugar" in both normal and pathological cases, i.e. diabetes mellitus and hyperinsulinism.

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Mathematical Models of Papermaking

Nonlinear Analysis Modelling and Control ◽

10.15388/na.2001.6.1.15221 ◽

2001 ◽

Vol 6 (1) ◽

pp. 9-19 ◽

Cited By ~ 1

Author(s):

A. Buikis ◽

J. Cepitis ◽

H. Kalis ◽

A. Reinfelds ◽

A. Ancitis ◽

...

Keyword(s):

Mathematical Model ◽

Initial Value Problems ◽

Moisture Transfer ◽

Bound Water ◽

Drying Process ◽

Initial Value ◽

First Order ◽

Heat And Moisture ◽

The Mathematical Model ◽

The Web

The mathematical model of wood drying based on detailed transport phenomena considering both heat and moisture transfer have been offered in article. The adjustment of this model to the drying process of papermaking is carried out for the range of moisture content corresponding to the period of drying in which vapour movement and bound water diffusion in the web are possible. By averaging as the desired models are obtained sequence of the initial value problems for systems of two nonlinear first order ordinary differential equations.

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The mathematical modelling of corrosion in hot dip galvanized steel reinforced concrete

International Review of Applied Sciences and Engineering ◽

10.1556/irase.2.2011.1.1 ◽

2011 ◽

Vol 2 (1) ◽

pp. 1-12

Author(s):

A. Hegyi ◽

H. Vermeşan ◽

V. Rus

Keyword(s):

Mathematical Model ◽

Reinforced Concrete ◽

Numerical Model ◽

Equation System ◽

Galvanized Steel ◽

Steel Reinforced Concrete ◽

Numeric Model ◽

Physical And Mathematical Models ◽

Physical Phenomena ◽

The Mathematical Model

Abstract In this paper we wish to present the numerical model elaborated in order to simulate some physical phenomena that influence the general deterioration of steel, whether hot dip galvanized or not, in reinforced concrete. We describe the physical and mathematical models, establishing the corresponding equation system, the initial and boundary conditions. We have also presented the numeric model associated to the mathematical model and the numeric methods of discretization and solution of the differential equations system that describes the mathematical model.

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