Un simulateur d'écoulement en temps réel comme aide à la prévision et à la gestion des rivières

1998 ◽  
Vol 25 (6) ◽  
pp. 992-1002
Author(s):  
Daniel Lavallée ◽  
Claude Marche ◽  
Francis Therrien
Keyword(s):  
Numerical Simulation ◽  
Unsteady Flow ◽  
Information Transmission ◽  
Real Time ◽  
Flow Regime ◽  
Decision Aid ◽  
Control Design ◽  
Graphical Interface ◽  
Web Page ◽  
Emergency Situations

The development of watersheds complicates the management of hydraulic facilities. Managers are facing economic and social imperatives that are potentially conflicting. Generally, their decisions are based on operational rules established by experience. However, these rules do not ensure that certain minimal conditions be respected and they do not determine future conditions for the river as a whole. Therefore, the communication of these conditions between managers of a same river is difficult. The present paper provides an approach to improve this situation. The real time simulator XSIM, with a graphical interface, has been developed in order to assist managers in control, design, analysis, and information transmission. It is designed based on an intumescence model functioning in an unsteady flow regime. It allows the managers to input the considered operations and provides them with the design conditions in a format adapted to their needs. It ensures the distribution and the availability of the results by creating a web page automatically. Its application to the management of complex sections of a real river is presented in order to illustrate its usefulness for day-to-day management and in emergency situations, such as a sudden flood or the rupture of a dam.Key words: flood, decision aid, management, unsteady flow regime, hydrology, graphical interface, numerical simulation.

scholarly journals Numerical Simulation Study of Booming Effect in Fast Currents of Inland River

2018 ◽  
Vol 38 ◽  
pp. 03048
Author(s):  
Rongchang Chen ◽  
Chen Liu ◽  
Xiaofeng Luo ◽  
Wei Shen
Keyword(s):  
Numerical Simulation ◽  
Environmental Conditions ◽  
Yangtze River ◽  
Flood Control ◽  
Peak Flow ◽  
Control Design ◽  
Simulation Method ◽  
Design Flow ◽  
The Yangtze River ◽  
Annual Average

In the downstream tidal section of the Yangtze River, nine kinds of combinations of hydrological environmental conditions are considered, including the annual average runoff flow, the annual average peak flow and the flood control design flow, as well as the three conditions of spring, medium and neap tides. By means of the numerical simulation method, the effective performance parameter values for conventional intercepting boom under different environmental conditions are obtained by simulating 9 kinds of maximum current speed to withstand, Max.CS, respectively. The results show that, in the downstream fast current tidal section of the Yangtze River, for the boom performance index of Max.CS, the relatively extensive applicability value should be 3.0kn under the condition of the annual average runoff flow; 4.0Kn should be selected under the condition of the annual average peak flow; and 4.5Kn should be selected under the flood control design flow. This study can provide technical support for the design, selection and use of booms in downstream waters of the Yangtze River.

scholarly journals LabVIEW Interface for Controlling a Test Bench for Photovoltaic Modules and Extraction of Various Parameters

2015 ◽  
Vol 6 (3) ◽  
pp. 498 ◽  
Author(s):  
Abderrezak Guenounou ◽  
Ali Malek ◽  
Michel Aillerie ◽  
Achour Mahrane
Keyword(s):  
Numerical Simulation ◽  
Mathematical Models ◽  
Energy Production ◽  
Test Bench ◽  
Graphical Interface ◽  
Detailed Report ◽  
Photovoltaic Modules ◽  
Pv Modules ◽  
Computer Controlled ◽  
Physical Phenomena

Numerical simulation using mathematical models that take into account physical phenomena governing the operation of solar cells is a powerful tool to predict the energy production of photovoltaic modules prior to installation in a given site. These models require some parameters that manufacturers do not generally give. In addition, the availability of a tool for the control and the monitoring of performances of PV modules is of great importance for researchers, manufacturers and distributors of PV solutions. In this paper, a test and characterization protocol of PV modules is presented. It consists of an outdoor computer controlled test bench using a LabVIEW graphical interface. In addition to the measuring of the IV characteristics, it provides all the parameters of PV modules with the possibility to display and print a detailed report for each test. After the presentation of the test bench and the developed graphical interface, the obtained results based on an experimental example are presented.

scholarly journals Land subsidence modelling for decision making on groundwater abstraction under emergency situation

2020 ◽  
Vol 382 ◽  
pp. 403-408
Author(s):  
Masaatsu Aichi
Keyword(s):  
Decision Making ◽  
Monte Carlo ◽  
Uncertainty Analysis ◽  
Real Time ◽  
Land Subsidence ◽  
Null Space ◽  
Emergency Situation ◽  
Computational Time ◽  
Groundwater Abstraction ◽  
Emergency Situations

Abstract. This study presents an inversion scheme with uncertainty analysis for a land subsidence modelling by a Monte Carlo filter in order to contribute to the decision-making on the groundwater abstraction. For real time prediction and uncertainty analysis under the limited computational resources and available information in emergency situations, one dimensional vertical land subsidence simulation was adopted for the forward modelling and the null-space Monte Carlo method was applied for the effective resampling. The proposed scheme was tested with the existing land subsidence monitoring data in Tokyo lowland, Japan. The results demonstrated that the prediction uncertainty converges and the prediction accuracy improves as the observed data increased with time. The computational time was also confirmed to be acceptable range for a real time execution with a laptop.

scholarly journals Implementasi Honeypot Menggunakan Dionaea Dan Kippo Sebagai Penunjang Keamanan Jaringan Komunikasi Komputer

2021 ◽  
Vol 9 (1) ◽  
pp. 80-91
Author(s):  
Adi Widiatmoko Wastumirad ◽  
Moh Irzam Darmawan
Keyword(s):  
Software Engineering ◽  
Real Time ◽  
The Internet ◽  
Web Page ◽  
Important Data ◽  
Security Issues ◽  
Demilitarized Zone ◽  
Internal Network ◽  
Waterfall Model ◽  
Search For Information

Today, the internet has become the most used tool for delivering information. Through the internet, people can search for information by freely accessing a web page. This freedom of access often raises security issues in the website provider's internal network. These security issues can be in the form of misuse of information, threats, and other attacks on the provider's internal network. Based on these conditions, a technique is needed to protect important data on the website owner's server from various attacks. In this research, a Honeypot security system has been implemented using Dionaea and Kippo in the Demilitarized Zone to increase the security of a network. The methodology of this research is Waterfall Model for software engineering. The system that has been built is able to detect, take action, record attack logs and display them in the form of a website in real time.

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