A method of constructing a mathematical model to study the reliability of mine transportation systems

V. M. Al'tshuler

doi:10.1007/bf02501712

Mathematical simulation of transient operation modes of an electric drive of a centrifugal pump for a slurry pipeline

E3S Web of Conferences ◽

10.1051/e3sconf/201914004012 ◽

2019 ◽

Vol 140 ◽

pp. 04012

Author(s):

Alexander Korzhev ◽

Olga Bolshunova ◽

Irina Voytyuk ◽

Anna Vatlina

Keyword(s):

Mathematical Model ◽

Computer Simulation ◽

Centrifugal Pump ◽

Asynchronous Motor ◽

Transportation Systems ◽

Control Algorithms ◽

Motor Drive ◽

Electric Drives ◽

And Performance ◽

Pumping Units

To develop new control algorithms for controlling slurry pumps, it is necessary to have a reliable mathematical model of their operation, convenient for computer simulation implementation. Therefore, the paper discloses a mathematical model of the joint operation of a centrifugal pump with a controlled asynchronous motor drive and a slurry pipeline. The results of transient modes computer simulation, carried out via the xcos application of the scilab software, are presented. This software is a freeware one and, therefore, available free of charge to most researchers. The paper provides an example of verification of the adequacy and performance of the proposed computer model, with the use of characteristics of the centrifugal slurry pump GrAT-225-67-3-2-2. The said model of a centrifugal pump is efficient and can be used during the study of dynamic processes in pipeline transportation systems, as well as in the synthesis of control algorithms for electric drives of pumping units.

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APPLICATIONS OF INSPECTION GAMES

Mathematical Modelling and Analysis ◽

10.3846/13926292.2004.9637251 ◽

2004 ◽

Vol 9 (3) ◽

pp. 179-192 ◽

Cited By ~ 23

Author(s):

R. Avenhaus

Keyword(s):

Mathematical Model ◽

Public Transportation ◽

Arms Control ◽

Transportation Systems ◽

Illegal Activity ◽

Legal Rules ◽

The Third ◽

Inspection Game ◽

Public Transportation Systems ◽

Over Time

An inspection game is a mathematical model of a non‐cooperative situation where an inspector verifies that another party, called inspectee, adheres to legal rules. The inspector wishes to deter illegal activity on the part of the inspectee and, should illegal activity nevertheless take place, detect it with the highest possible probability and as soon as possible. The inspectee may have some incentive to violate his commitments and violation, if observed, will incur punishment. Therefore if he chooses illegal behaviour, the inspectee will wish to avoid detection with the highest possible probability. Three examples of applications are presented. The first one deals with random controls in public transportation systems. The second one describes the problem of verification of arms control and disarmament in a very general way. The third one deals with inspections over time which are important in the context of non‐proliferation verification.

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An Assessment Framework for the Transformation of Mobility 4.0 in Smart Cities

Systems ◽

10.3390/systems10010001 ◽

2021 ◽

Vol 10 (1) ◽

pp. 1

Author(s):

Hakan Inac ◽

Ercan Oztemel

Keyword(s):

Mathematical Model ◽

Reference Model ◽

Smart Cities ◽

Transportation Systems ◽

Transformation Process ◽

Digital Transformation ◽

Decision Makers ◽

Strategic Action ◽

Related Services ◽

Transport Services

Investing in digital transformation turns out to be a strategic action to tackle contemporary issues and to improve competitiveness for enterprises. The high variability of options in the digital transformation process enforces a higher complexity level in configuring and setting up objectives and goals based on cities’ needs; hence, a systematic approach is required to assist decision makers for better and sustainable transformation. A reference model is described in this paper to support decision makers with comprehensive assessment data for digital transformation cities transport. The proposed reference model assesses the cities based on digital transformation of transport services to assist policy makers for better decisions in transforming the Mobility 4.0. The proposed model in this study functions as a knowledge-based systematic framework for assessing the capabilities of the cities, diagnosing their needs under given circumstances and identifying the best fitting workflow for digital transformation of urban transportation systems and related services. The reference model takes on board a group of smart city indices with respective assessment criteria in determining a smartness level of transportation components. A conceptual 4-tier smartness scale has been proposed to establish a consistent assessment subject to cities circumstances in many respects. The reference model has been formalised into a mathematical model to characterise the assessments. The mathematical model encompasses strategic assessments by experts to identify priorities of investments in the digitalization process, which are aligned with strategic goals and policies of cities’ management.

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