The Experts below are selected from a list of 30537 Experts worldwide ranked by ideXlab platform
Ying Jun Zhang - One of the best experts on this subject based on the ideXlab platform.
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Graph-based Cyber Security Analysis of State Estimation in Smart Power Grid
IEEE Communications Magazine, 2017Co-Authors: Ying Jun ZhangAbstract:The smart power grid enables intelligent automation at all levels of power system operation, from electricity generation at power plants to power usage in the home. The key enabling factor of an efficient smart grid is its built-in ICT, which monitors the real-time system operating state and makes control decisions accordingly. As an important building block of the ICT system, power system state estimation is of critical importance to maintain normal operation of the smart grid, which, however, is under mounting threat from potential cyber attacks. In this article, we introduce a graph-based framework for performing cyber-security analysis in power system state estimation. Compared to conventional arithmetic- based security analysis, the Graphical characterization of state estimation security provides intuitive visualization of some complex problem structures and enables efficient Graphical Solution algorithms, which are useful for both defending and attacking the ICT system of the smart grid. We also highlight several promising future research directions on graph-based security analysis and its applications in smart power grid.
Ying-jun Angela Zhang - One of the best experts on this subject based on the ideXlab platform.
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Graph-based cyber security analysis of state estimation in smart power grid
IEEE Communications Magazine, 2017Co-Authors: Suzhi Bi, Ying-jun Angela ZhangAbstract:Smart power grid enables intelligent automation at all levels of power system operation, from electricity generation at power plants to power usage at households. The key enabling factor of an efficient smart grid is its built-in information and communication technology (ICT) that monitors the real-time system operating state and makes control decisions accordingly. As an important building block of the ICT system, power system state estimation is of critical importance to maintain normal operation of the smart grid, which, however, is under mounting threat from potential cyber attacks. In this article, we introduce a graph-based framework for performing cyber-security analysis in power system state estimation. Compared to conventional arithmetic-based security analysis, the Graphical characterization of state estimation security provides intuitive visualization of some complex problem structures and enables efficient Graphical Solution algorithms, which are useful for both defending and attacking the ICT system of smart grid. We also highlight several promising future research directions on graph-based security analysis and its applications in smart power grid.
Suzhi Bi - One of the best experts on this subject based on the ideXlab platform.
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Graph-based cyber security analysis of state estimation in smart power grid
IEEE Communications Magazine, 2017Co-Authors: Suzhi Bi, Ying-jun Angela ZhangAbstract:Smart power grid enables intelligent automation at all levels of power system operation, from electricity generation at power plants to power usage at households. The key enabling factor of an efficient smart grid is its built-in information and communication technology (ICT) that monitors the real-time system operating state and makes control decisions accordingly. As an important building block of the ICT system, power system state estimation is of critical importance to maintain normal operation of the smart grid, which, however, is under mounting threat from potential cyber attacks. In this article, we introduce a graph-based framework for performing cyber-security analysis in power system state estimation. Compared to conventional arithmetic-based security analysis, the Graphical characterization of state estimation security provides intuitive visualization of some complex problem structures and enables efficient Graphical Solution algorithms, which are useful for both defending and attacking the ICT system of smart grid. We also highlight several promising future research directions on graph-based security analysis and its applications in smart power grid.
Jorge A Laval - One of the best experts on this subject based on the ideXlab platform.
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Graphical Solution and continuum approximation for the single destination dynamic user equilibrium problem
Transportation Research Part B-methodological, 2009Co-Authors: Jorge A LavalAbstract:This paper studies the user optimum dynamic traffic assignment in a network consisting of a congested freeway section connected to a surface street grid via capacitated off-ramps. It is shown that although the network is simple, it is in general complicated to obtain the optimum Solution analytically because (i) it has two different alternating diversion patterns and (ii) it can only be obtained sequentially in time. A simplified Graphical Solution method is proposed to cope with (i) but the method remains sequential. Finally, a continuum approximation is proposed that enables finding closed-form Solutions without the above limitations.
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system optimum dynamic traffic assignment Graphical Solution method for a congested freeway and one destination
Transportation Research Part B-methodological, 2006Co-Authors: Juan Carlos Munoz, Jorge A LavalAbstract:This paper studies the system optimum dynamic traffic assignment in a network consisting of a hypothetical surface street grid and a congested freeway section. Vehicles can be diverted through off-ramps, and onramps can be metered. The family of Solutions are identified Graphically using Newells queueing diagrams. Because enforcing diversion is still a technological puzzle, these results provide a benchmark for future ITS applications, and a building-block for including both departure time choice and several destinations. It is also shown that pricing according to marginal cost would be difficult to implement in this case, that eliminating all queues from the freeway is always suboptimal, and that ramps near the bottleneck should be metered more severely. � 2005 Elsevier Ltd. All rights reserved.
M H Ganjali - One of the best experts on this subject based on the ideXlab platform.
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lateral earth pressure problem of cohesive backfill with inclined surface
Journal of Geotechnical and Geoenvironmental Engineering, 1997Co-Authors: Z H Mazindrani, M H GanjaliAbstract:Terzaghi presented a Graphical Solution to the lateral earth pressure problem of cohesive backfill with an inclined surface. This procedure becomes tiresome for solving practical retaining wall problems because several Mohr circles need to be drawn to determine the lateral earth pressure profile. This paper presents an analytical Solution to this problem. The values of active and passive earth pressure coefficients k. and kp for various values of cf>, ~, and c!'yz are presented in tabular form. An example is provided to illustrate the appli cation.
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lateral earth pressure problem of cohesive backfill with inclined surface
Journal of Geotechnical and Geoenvironmental Engineering, 1997Co-Authors: Z H Mazindrani, M H GanjaliAbstract:Terzaghi presented a Graphical Solution to the lateral earth pressure problem of cohesive backfill with an inclined surface. This procedure becomes tiresome for solving practical retaining wall pro...
