scholarly journals PULSim: User-Based Adaptable Simulation Tool for Railway Planning and Operations

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Yong Cui ◽  
Ullrich Martin ◽  
Jiajian Liang
Keyword(s):  
Basic Mechanism ◽  
Software Tools ◽  
Simulation Tool ◽  
End User ◽  
Integrated Simulation ◽  
Simulation Tools ◽  
Simulation Process ◽  
Railway Planning ◽  
Critical Issues ◽  
Railway System

Simulation methods are widely used in the field of railway planning and operations. Currently, several commercial software tools are available that not only provide functionality for railway simulation but also enable further evaluation and optimisation of the network for scheduling, dispatching, and capacity research. However, the various tools are all lacking with respect to the standards they utilise as well as their published interfaces. For an end-user, the basic mechanism and the assumptions built into a simulation tool are unknown, which means that the true potential of these software tools is limited. One of the most critical issues is the lack of the ability of users to define a sophisticated workflow, integrated in several rounds of simulation with adjustable parameters and settings. This paper develops and describes a user-based, customisable platform. As the preconditions of the platform, the design aspects for modelling the components of a railway system and building the workflow of railway simulation are elaborated in detail. Based on the model and the workflow, an integrated simulation platform with open interfaces is developed. Users and researchers gain the ability to rapidly develop their own algorithms, supported by the tailored simulation process in a flexible manner. The productivity of using simulation tools for further evaluation and optimisation will be significantly improved through the user-adaptable open interfaces.

Simulation Tool for Assignment Models: SIMASI

2014 ◽  
Vol 13 (8) ◽  
pp. 4723-4728
Author(s):  
Pratiksha Saxena ◽  
Smt. Anjali
Keyword(s):  
Optimization Procedure ◽  
Simulation Tool ◽  
Optimization Strategy ◽  
Performance Measurements ◽  
Integrated Simulation ◽  
Assignment Model ◽  
Classical Models ◽  
Simulation Results ◽  
User Friendly ◽  
Assignment Models

In this paper, an integrated simulation optimization model for the assignment problems is developed. An effective algorithm is developed to evaluate and analyze the back-end stored simulation results. This paper proposes simulation tool SIMASI (Simulation of assignment models) to simulate assignment models. SIMASI is a tool which simulates and computes the results of different assignment models. This tool is programmed in DOT.NET and is based on analytical approach to guide optimization strategy. Objective of this paper is to provide a user friendly simulation tool which gives optimized assignment model results. Simulation is carried out by providing the required values of matrix for resource and destination requirements and result is stored in the database for further comparison and study. Result is obtained in terms of the performance measurements of classical models of assignment system. This simulation tool is interfaced with an optimization procedure based on classical models of assignment system. The simulation results are obtained and analyzed rigorously with the help of numerical examples. 

scholarly journals TESSA: design and implementation of a platform for situational sea awareness

2017 ◽  
Vol 17 (2) ◽  
pp. 185-196
Author(s):  
Mario Scalas ◽  
Palmalisa Marra ◽  
Luca Tedesco ◽  
Raffaele Quarta ◽  
Emanuele Cantoro ◽  
...  
Keyword(s):  
Situational Awareness ◽  
Building Blocks ◽  
Ministry Of Education ◽  
End User ◽  
Performance Requirements ◽  
Platform Architecture ◽  
Front End ◽  
Critical Issues ◽  
And Performance ◽  
Key Aspects

Abstract. This article describes the architecture of sea situational awareness (SSA) platform, a major asset within TESSA, an industrial research project funded by the Italian Ministry of Education and Research. The main aim of the platform is to collect, transform and provide forecast and observational data as information suitable for delivery across a variety of channels, like web and mobile; specifically, the ability to produce and provide forecast information suitable for creating SSA-enabled applications has been a critical driving factor when designing and evolving the whole architecture. Thus, starting from functional and performance requirements, the platform architecture is described in terms of its main building blocks and flows among them: front-end components that support end-user applications and map and data analysis components that allow for serving maps and querying data. Focus is directed to key aspects and decisions about the main issues faced, like interoperability, scalability, efficiency and adaptability, but it also considers insights about future works in this and similarly related subjects. Some analysis results are also provided in order to better characterize critical issues and related solutions.

scholarly journals A Simulation Tool for Evaluating Video Streaming Architectures in Vehicular Network Scenarios

Electronics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1970
Author(s):  
Pedro Pablo Garrido Abenza ◽  
Manuel P. Malumbres ◽  
Pablo Piñol ◽  
Otoniel López Granado
Keyword(s):  
Video Transmission ◽  
Vehicular Networks ◽  
Experimental Tests ◽  
Video Encoding ◽  
Simulation Tool ◽  
Simulation Research ◽  
Integrated Simulation ◽  
Network Simulators ◽  
Set Up ◽  
User Friendly

An integrated simulation tool called Video Delivery Simulation Framework over Vehicular Networks (VDSF-VN) is presented. This framework is intended to allow users to conduct experiments related to video transmission in vehicular networks by means of simulation. Research on this topic requires the use of many independent tools, such as traffic and network simulators, intermediate frameworks, video encoders and decoders, converters, platform-dependent scripting languages, data visualisation packages and spreadsheets, and some other tasks are performed manually. The lack of tools necessary to carry out all these tasks in an integrated and efficient way formed the motivation for the development of the VDSF-VN framework. It is managed via two user-friendly applications, GatcomSUMO and GatcomVideo, which allow all the necessary tasks to be accomplished. The first is primarily used to build the network scenario and set up the traffic flows, whereas the second involves the delivery process of the whole video, encoding/decoding video, running simulations, and processing all the experimental results to automatically provide the requested figures, tables and reports. This multiplatform framework is intended to fill the existing gap in this field, and has been successfully used in several experimental tests of vehicular networks.

scholarly journals Simulation Tools for Underwater Sensor Networks: A Survey

2017 ◽  
Vol 8 (4) ◽  
pp. 41 ◽  
Author(s):  
Anjana P Das ◽  
Sabu M Thampi
Keyword(s):  
Open Source ◽  
Underwater Sensor Networks ◽  
Simulation Tool ◽  
Simulation Environment ◽  
Test Bed ◽  
Simulation Tools ◽  
Data Links ◽  
Practical Challenge ◽  
Complete Test ◽  
Selection Of

In underwater sensor network(UWSN) research, it is highly expensive to deploy a complete test bed involving complex network structure and data links to validate a network protocol or an algorithm. This practical challenge points to the need of a simulation environment which can reproduce the actual underwater scenario without the loss of generality. Since so many simulators are proposed for UWSN simulation, the selection of an appropriate tool based on the research requirement is very important in validation and interpretation of results. This paper provides an in-depth survey of different simulation tools available for UWSN simulation. We compared the features offered by each tool, pre-requirements, and provide the run time experiences of some of the open source tools. We conducted simulation of sample scenarios in some of the open source tools and compared the results. This survey helps a researcher to identify a simulation tool satisfying their specific research requirements.

Construction of a Code Verification Matrix for Heat Conduction With Finite Element Code Applications

2020 ◽  
Vol 5 (4) ◽  
Author(s):  
Aysenur Toptan ◽  
Nathan W. Porter ◽  
Jason D. Hales ◽  
Benjamin W. Spencer ◽  
Martin Pilch ◽  
...  
Keyword(s):  
Finite Element ◽  
Heat Conduction ◽  
Analytic Solution ◽  
Analytic Solutions ◽  
Simulation Tool ◽  
Code Verification ◽  
Simulation Tools ◽  
Steady State Heat ◽  
The One ◽  
Selection Of

Abstract When establishing the pedigree of a simulation tool, code verification is used to ensure that the implemented numerical algorithm is a faithful representation of its underlying mathematical model. During this process, numerical results on various meshes are systematically compared to a reference analytic solution. The selection of analytic solutions can be a laborious process, as it is difficult to establish adequate code confidence without performing redundant work. Here, we address this issue by applying a physics-based process that establishes a set of reference problems. In this process, code simulation options are categorized and systematically tested, which ensures that gaps in testing are easily identified and addressed. The resulting problems are primarily intended for code verification analysis but may also be useful for comparison to other simulation codes, troubleshooting activities, or training exercises. The process is used to select fifteen code verification problems relevant for the one-dimensional steady-state heat conduction equation. These problems are applicable to a wide variety of simulation tools, but, in this work, a demonstration is performed using the finite element-based nuclear fuel performance code BISON. Convergence to the analytic solution at the theoretical rate is quantified for a selection of the problems, which establishes a baseline pedigree for the code. Not only can this standard set of conduction solutions be used for verification of other codes, but also the physics-based process for selecting problems can be utilized to quantify and expand testing for any simulation tool.

Social sustainability and urban mobility: shifting to a socially responsible pro-poor perspective

2015 ◽  
Vol 11 (1) ◽  
pp. 82-97 ◽  
Author(s):  
Margaret Grieco
Keyword(s):  
Social Sustainability ◽  
Urban Transport ◽  
International Agency ◽  
Urban Mobility ◽  
End User ◽  
Content Type ◽  
Global Trends ◽  
The Social ◽  
Critical Issues ◽  
Sustainable Urban Mobility

Purpose – This paper aims to describe global trends and policy responses with respect to the social sustainability of urban mobility which, put simply, refers to whether the benefits and costs of transport and travel services (mobility) and the spatial organisation of facilities and services (accessibility) are equally and equitably distributed in a society or community. Considering urban transport provision from a social sustainability framework raises critical issues of policy goals and purpose, not least of which is the consideration that policies aimed at stemming or reducing urban mobility should not accentuate existing inequities and inequalities in accessibility. It also raises issues of reshaping urban decision-making structures to better integrate the end-user, where the end-user includes both those who are presently included in mobility and accessibility provision and, most importantly, those who are presently and have been previously excluded. Design/methodology/approach – Comprehensive research into the global policy literature and urban practice around socially sustainable urban mobility under the auspices of an international agency. Findings – The databases and methodologies around social sustainability have not been sufficiently developed to permit ready operationalisation. The use of electronic technology and user feedback – which such technology makes possible – has not been adequately harnessed to develop the necessary methodologies for the measurement of social sustainability with respect to urban mobility. Research limitations/implications – The development of improved social sustainability methodologies will increase the probability of the building of pro-poor infrastructure. Practical implications – The development of improved social sustainability methodologies will proved improved frameworks for evaluating the social responsibility of transport options. Social implications – The development of participatory methodologies and evaluatory frameworks will lead towards more cohesive and better integrated cities, that is more socially sustainable cities. Originality/value – This paper makes the case that the participatory research necessary to the evaluation of transport projects, schemes and networks as socially sustainable has not yet been undertaken. It brings together a set of global evidence to make the case that current discussions of the social sustainability currently take place in an evidence and policy vacuum.

scholarly journals Evaluation of efficiency and reliability of airport processes using simulation tools

2021 ◽  
Vol 23 (4) ◽  
pp. 659-669
Author(s):  
Paweł Gołda ◽  
Tomasz Zawisza ◽  
Mariusz Izdebski
Keyword(s):  
Genetic Algorithm ◽  
Decision Making ◽  
Simulation Tool ◽  
Simulation Tools ◽  
Aircraft Landing ◽  
Mutation Operators ◽  
Decision Making Model ◽  
Crossover And Mutation ◽  
Efficiency And Reliability

The purpose of this paper is to evaluate the efficiency of airport processes using simulation tools. A critical review of selected scientific studies relating to the performance of airport processes with respect to reliability, particularly within the apron, has been undertaken. The developed decision-making model evaluates the efficiency of airport processes in terms of minimizing penalties associated with aircraft landing before or after the scheduled landing time. The model takes into account, among other things, aircraft take-offs and landings and separation times between successive aircraft. In order to be able to verify the correctness of the decision-making model, a simulation tool was developed to support decision making in the implementation of airport operations based on a genetic algorithm. A novel development of the structure of a genetic algorithm as well as crossover and mutation operators adapted to the determination of aircraft movement routes on the apron is presented. The developed simulation tool was verified on real input data.

scholarly journals DIGITAL ENERGY SIMULATION OF BUILDINGS PROTECTED BY MUNICIPAL HERITAGE POLICIES IN THE FRAMEWORK OF ENERGY RENOVATION PROJECTS

2020 ◽  
Vol XLIV-M-1-2020 ◽  
pp. 421-426
Author(s):  
B. Serrano Lanzarote ◽  
P. Carnero Melero ◽  
V. Valero Escribano ◽  
L. Ramírez Pareja
Keyword(s):  
City Planning ◽  
Energy Simulation ◽  
Current Status ◽  
Simulation Tool ◽  
Digital Analysis ◽  
Energy Audit ◽  
Simulation Tools ◽  
Heritage Sites ◽  
Heritage Buildings ◽  
Dynamic Energy Simulation

Abstract. The energy simulation is a key tool when designing renovation actions on buildings. In the framework of the InterregMed SHERPA project, bound to trigger and manage energy renovations in public buildings, the digital analysis of an educational building affected by the municipal heritage protection has been carried out. The building is the CIPFP Blasco Ibáñez, catalogued as a monument of local interest in Valencia (Spain) city planning, where the heritage value of its facades (main and interior), roof and internal spatial structure is identified.The methodology used consists in performing an energy audit of the building in order to be able to customize a digital energy model. By means of an hourly dynamic energy simulation tool, the current status of the building and its systems can be determined, and energy renovation actions can be outlined. The use of digital analysis tools is of utmost interest in buildings declared as municipal heritage sites since enables the study to be performed in a non-intrusive manner. Several points of energy improvement are identified. There are some actions that can be performed without affecting parameters protected by the heritage status, and some others which need to be modified in order to be compliant with it. Furthermore, the digital analysis through energy simulation tools also allows to perform detailed calculations about the energy, environmental and economic savings associated with the measures. The assessment has proved the need to promote research and testing of new solutions and technologies to improve the energy efficiency of heritage buildings.

scholarly journals Evaluation of Freight Measures by Integrating Simulation Tools: The Case of Volos Port, Greece

2018 ◽  
Vol 19 (3) ◽  
pp. 224-232 ◽  
Author(s):  
Ioannis Karakikes ◽  
Wladimir Hofmann ◽  
Lambros Mitropoulos ◽  
Mihails Savrasovs
Keyword(s):  
Impact Evaluation ◽  
Simulation Models ◽  
Simulation Modelling ◽  
Simulation Software ◽  
Transport Systems ◽  
Integrated Simulation ◽  
Simulation Tools ◽  
Traffic Conditions ◽  
High Level ◽  
Decision Making Tool

Abstract Simulation modelling tools have been widely adopted for the evaluation of alternatives in transport planning, management and logistics. The complexity that underlies in transport systems and logistics necessitate the integration of different models that are capable of overcoming limitations that may exist individually to each model. Towards this direction, this paper aims to integrate two simulation software and use the integrated model for the evaluation of traffic and logistics measures in the wider area of Volos Port, Greece. The built model is able to simulate the traffic conditions on a transport network along with port’s intra-logistics processes and is used to evaluate a set of measures in the year 2030, by comparing it with the situation in the year 2030 without having implemented any new measure. For the evaluation, a set of indicators is used to gauge the environmental and transport impacts. The analysis is completed by using a multi-criteria decision making tool to generate the Logistics Sustainability Index (LSI) to summarize the information that is provided by the indicators. The results show that the use of integrated simulation models can provide a holistic impact evaluation of complex decisions with a high level of accuracy.

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