The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Every link of power system may exist security risks, power industry funds and technology is highly concentrated, the production equipment is very expensive, its operating parameters almost reached the extreme, physical simulation of its production process of experimental teaching costs are extremely high, resource consumption is huge, and may cause malignant environmental pollution. Teaching, training...
The article deals with a general simulation model which has been created to analyse capacity of single-lane roundabouts. The simulation model is created in Witness and all input data that must be provided by users are defined via a web application which has been programmed to communicate with the general simulation model. The web application also presents some results of simulation experiments; the...
While forestry is an important economic factor, the common methods used to estimate potential financial gains from undertaking a harvest project in Germany are usually based on heuristics and experience. Experience-based estimation methods focus on utilizing a few general statistical parameters that define the harvest operation, employing an abstract view on wood harvesting. To improve the accuracy...
The components and systems involved in railway operation are subject to stringent reliability and safety requirements, but up until now the cyber security of those same systems has been largely under-explored. In this work, we examine a widely-used railway technology, track beacons or balises, which provide a train with its position on the track and often assist with accurate stopping at stations...
Environmental control and life support system(ECLSS) of the manned spacecraft is an important system to guarantee the safety and life support of the astronauts and the environment inside the space station. For the physicochemical regeneration type of ECLSS(PRLSS), because of its complicated physicochemical process, to analyze and evaluate the mass balance and operation performance through simulation...
Public transport systems already encounter vast amounts of data per day, ranging from the GPS information of vehicles to sensor checks on real-time locations. Newer technologies such as social media, sensor networks or passenger counting systems, to name just a few, present new opportunities as well as new challenges to accommodate even larger data volumes, essentially leading to a big data problem...
Modelling and simulation (Mod-Sim) tools are becoming a crucial component in the design and evaluation of cyber and physical security systems. Many Mod-Sim tools exist for the elucidation of attack scenarios, characterization of facility vulnerabilities, and the construction and maintenance of optimal protection systems. The growing use of Mod-Sim tools for assessment of physical and cyber security...
The paper describes the design of 1553B bus simulation in satellite simulation based on TCP/IP. It illustrates the total structure of the platform, the workflow of the platform, such as bus network workflow, command word transmission workflow etc.
This paper shows the application of statistics techniques, simulation and optimization methods for data - based scheduling production. The software of this methods, allows us to analyze the process construction rules for many variants reflecting a variety of combination other factors. For the analysis of the production process the greedy randomized adaptive search procedure (GRASP) and simulation...
Most of the existing contributions for container terminal analysis follow approaches based on optimization models, that are mainly useful to support strategic decisions about terminal container configuration. Many others contributions follow the simulation approach, which allows a detailed analysis but may lead to computational problems and is rather computer demanding, especially when resulting models...
Agile development refers to the group of software development methodologies based on an iterative and incremental process model. It divides the development period into short time frames called iterations and uses a body of knowledge obtained from past experience called practice to ensure agile software development Although the iteration length is an important factor in agile development however it...
Integration of simulators, data sources, optimizers and other tools is discussed in this paper. More exacting requirements on the quality of the plant operation together with environmental limits and lowering energy intensity bring more complex control systems into the everyday life. When controlling the complex multi-variable systems usually variety of control techniques can be applied in all layers...
The production process of steelmaking-continuous casting is a complex process which is high temperature, continuous, and uncertain. A multi-agent based simulation model is proposed to simulate the complex production process. Firstly, we present a simulation system architecture based on multi-agent technique. Secondly, we present the functional structure of agent and the communication / storage mechanism...
Development of service-oriented architecture has become more and more maturated. It provides a good solution for integrated design of complex system in effected. provides a better framework for simulation of complex system. This paper introduces concept, principle, essential characteristic and technique advantages of SOA, design integration of independent functions on heterogeneous platforms and reuse...
Simulation is the most common approach to perform the problem research. Among several types of simulation, the most common way is the discrete simulation, which assumes the division of the time scale into fixed length time slots. Depending on investigated problem, simulation packages may be used or it could be necessary to design and create own simulation system. In this paper, we propose the complete...
Modeling and simulation of gas turbines was a hot research direction at home and abroad. In this paper, micro-turbojet JetCAT-P80, a aviation gas turbine, was took as the research object, which the thermodynamic parameters of the various sections and the engine performance parameters of the design conditions were solved with the Matlab software. On this basis, GasTurb, a system-level modeling and...
A four-node wireless network model is designed based on NS2 simulation platform software. The network performance, such as System delay, Packet loss rate, Throughput and other key indicators are simulated in this paper. By running of TCP and UDP protocols, we make the analysis and evaluation to network performance from different aspects, and then, associated parameters were compared graphically with...
The Modeling and Simulation (M&S) of complex systems leans on the collaboration between different actors coming from specific domains. These actors have to communicate through an efficient way in order to improve the M&S process. We therefore propose in this article a collaborative M&S software framework called DEVSimPy. We point out the use of DEVSimPy through a concrete case study: hydraulic...
Discrete event systems (DES) theory has been developed and widely used to study the behavior of complex systems. In this paper, from a formalism based on this theory (DEVS), we propose to present a formal approach for taking into account the knowledge evolution. Indeed, knowledge is not static; it can evolve in time, or during the simulation. Few tools offer to take into account these developments,...
This paper first analyzed the technical background and the realistic demand of the web-based system of product customization and simulation. And then, the overall system structure and the work process were proposed, analysis and statement of the essential technology was proposed. Based on the research, a web-based system of product customization and simulation was developed primarily in JSP, and a...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.