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Fault classification and reconfiguration of distribution systems using equivalent capacity margin method

K. Sathish KUMAR, T. JAYABARATHI

Frontiers in Energy 2012, Volume 6, Issue 4,   Pages 394-402 doi: 10.1007/s11708-012-0211-0

Abstract: machine learning based on statistical learning theory, achieves good generalization ability by adopting a structuralrisk minimization (SRM) induction principle aimed at minimizing a bound on the generalization errorof a model rather than the minimization of the error on the training data only.

Keywords： support vector machines (SVM)     structural risk minimization (SRM)     equivalent capacity margin (ECM)     restoration    

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Structural risk analysis of trans-oceanic suspension bridges

Zhang Qiang,Ma Jinghai

Strategic Study of CAE 2010, Volume 12, Issue 7,   Pages 61-63

Abstract:

The paper states the methodology of SRA (structural risk analysis)ofThe risks to be controlled necessarily are concluded by the global risk analysis, and how to achievethe control is worked out by the element risk analysis.

Keywords： suspension bridge     structural risk analysis     bridge management    

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Distributed governance of Solar Radiation Management geoengineering: A possible solution to SRM’s “free-driver

Andrew LOCKLEY

Frontiers of Engineering Management 2019, Volume 6, Issue 4,   Pages 551-556 doi: 10.1007/s42524-019-0055-y

Abstract: Solar Radiation Management geoengineering (SRM) offers relatively inexpensive, rapid temperature controlHowever, this low cost leads to a risk of controversial unilateral intervention—the “free-driver” problemConsequently, this creates a risk of counter-geoengineering (deliberate warming) (Parker et al., 2018

Keywords： geoengineering     Solar Radiation Management     governance     decentralised    

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Mechanism on minimization of excess sludge in oxic-settling-anaerobic (OSA) process

WANG Jianfang, ZHAO Qingliang, JIN Wenbiao, LIN Jikan

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1,   Pages 36-43 doi: 10.1007/s11783-008-0001-4

Abstract: It has been concluded that multiple causes resulted in the minimization of excess sludge in the OSA system
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Optimization of cold-end system of thermal power plants based on entropy generation minimization

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 956-972 doi: 10.1007/s11708-021-0785-5

Abstract: Cold-end systems are heat sinks of thermal power cycles, which have an essential effect on the overall performance of thermal power plants. To enhance the efficiency of thermal power plants, multi-pressure condensers have been applied in some large-capacity thermal power plants. However, little attention has been paid to the optimization of the cold-end system with multi-pressure condensers which have multiple parameters to be identified. Therefore, the design optimization methods of cold-end systems with single- and multi-pressure condensers are developed based on the entropy generation rate, and the genetic algorithm (GA) is used to optimize multiple parameters. Multiple parameters, including heat transfer area of multi-pressure condensers, steam distribution in condensers, and cooling water mass flow rate, are optimized while considering detailed entropy generation rate of the cold-end systems. The results show that the entropy generation rate of the multi-pressure cold-end system is less than that of the single-pressure cold-end system when the total condenser area is constant. Moreover, the economic performance can be improved with the adoption of the multi-pressure cold-end system. When compared with the single-pressure cold-end system, the excess revenues gained by using dual- and quadruple-pressure cold-end systems are 575 and 580 k$/a, respectively.

Keywords： cold-end system     entropy generation minimization     optimization     economic analysis     genetic algorithm    

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Power system reconfiguration and loss minimization for a distribution systems using “Catfish PSO” algorithm

K Sathish KUMAR,S NAVEEN

Frontiers in Energy 2014, Volume 8, Issue 4,   Pages 434-442 doi: 10.1007/s11708-014-0313-y

Abstract: reconfiguration (DFR) problem for a 33-bus and a 16-bus sample network, which effectively ensures the loss minimization

Keywords： distribution system reconfiguration (DFR)     power loss reduction     catfish particle swarm optimization (catfish PSO)     radial structure    

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Robust design approach to the minimization of functional performance variations of products and systems

J. ZHANG, H. DU, D. XUE, P. GU

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2,   Pages 379-392 doi: 10.1007/s11465-020-0607-1

Abstract: Functional performance variations of products and systems are often used to measure the qualities of products and systems considering the changes in the design parameter values caused by uncertainties. A robust design approach has been developed in this research to minimize the functional performance variations considering the design parameter uncertainties by identifying the boundaries of the functional performance variations through optimization. In this work, a mathematical model is developed to describe the relationships among functional performance, design configurations and parameters, and design parameter uncertainties. A multi-level optimization model is established to identify: (1) The optimal design configuration, (2) the optimal values of design parameters, and (3) the boundaries of functional performance variations. Sensitivity analysis considering the impact of parameter uncertainties on functional performance variation boundaries has also been conducted. A case study on the design of a truss system has been conducted. Case study results show that the sensitivities of functional performance variation boundaries to the design parameter uncertainties can be reduced significantly using the new robust design approach.

Keywords： product design     robust design     design optimization     uncertainties    

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Security of solar radiation management geoengineering

Andrew LOCKLEY

Frontiers of Engineering Management 2019, Volume 6, Issue 1,   Pages 102-116 doi: 10.1007/s42524-019-0008-5

Abstract:

Solar Radiation Management (SRM) geoengineering is a proposed response to anthropogenic global warmingSRM disruption risks dangerous temperature rise (termination shock).Concentrating on aircraft-delivered Stratospheric Aerosol Injection (SAI), we appraise threats to SRMattacks are more disruptive, but unlikely – although superpowers’ symbolic overt attacks may deter SRMA multilateral, consensual SRM approach reduces likely attack triggers.

Keywords： security     geoengineering     solar radiation ma-nagement     SRM    

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Optimal operation of energy at hydrothermal power plants by simultaneous minimization of pollution and

Homayoun EBRAHIMIAN,Bahman TAHERI,Nasser YOUSEFI

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 426-432 doi: 10.1007/s11708-015-0376-4

Abstract: The aim of this paper is simultaneous minimization of hydrothermal units to reach the best solution by

Keywords： practical constraints of units     pollution function     inlet steam valve     up-ramp rate of units     improved ABC algorithm    

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Fragility assessment of wood sheathing panels and roof-to-wall connections subjected to wind loading

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 867-876 doi: 10.1007/s11709-021-0745-5

Abstract: The performance of the wood-frame buildings after tornadoes has shown that the majority of the wind damage resulted from building envelope failure most typically due to the loss of the roof. To assess the performance and the reliability of low-rise wood-frame residential buildings with a focus on the roofs, fragility analysis can be used to estimate the probability of failure of a roof when constructed with specified nails and sheathing sizes. Thus, this paper examines the fragility of specific types of nails, roof-to-wall (RW) connection details, and sheathing sizes based on the damaged roofs that were previously assessed in the Dunrobin area in Ottawa (Ontario) that was hit with an Enhanced Fujita (EF3) tornado on September 21, 2018. The presented fragility analysis considers four scenarios, including different sheathing and nail sizes. Dead loads, wind loads, and resistance on the sheathing panels were compiled and analyzed to determine the failure of the examined roofs. The eight fragility models suggest that the safest roof sheathing (RS) is the 1.22 m × 1.22 m sheathing panel with 8 d nails, and the safest RW connections is achieved by using H2.5 hurricane clips.

Keywords： tornadoes     wind loads     low-rise buildings     fragility analysis     risk assessment     structural failures    

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Forward osmosis coupled with lime-soda ash softening for volume minimization of reverse osmosis

Jiandong Lu, Shijie You, Xiuheng Wang

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 1, doi: 10.1007/s11783-020-1301-6

Abstract: Abstract • Forward osmosis (FO) coupled with chemical softening for CCI ROC minimization • Effectivethis study, we focused on coupling forward osmosis (FO) with chemical softening (FO-CS) for the volume minimizationThis study provides a proof-of-concept demonstration of the FO-CS coupling process for ROC volume minimization

Keywords： Coal chemical industry     Forward osmosis     Chemical softening     Reverse osmosis concentrate    

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Electromagnetic modeling and control of switched reluctance motor using finite elements

Ali ARIF,Abderrazak GUETTAF,Ahmed Chaouki MEGHERBI,Said BENRAMACHE,Fateh BENC HABANE

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 355-363 doi: 10.1007/s11708-014-0319-5

Abstract: reluctance motors (SRMs) and presented a novel approach to the accurate online modeling of a three phase 6/4 SRMA three phase 6/4 SRM is given theoretical calculation of inductance of the SRM model.The SRM was then tested in a Matlab/Simulink environment and numerically analyzed by using nonlinear

Keywords： switched reluctance motor (SRM)     hysteresis     control     finite element analysis    

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Approximation of structural damping and input excitation force

Mohammad SALAVATI

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 244-254 doi: 10.1007/s11709-016-0371-9

Abstract: Structural dynamic characteristics are the most significant parameters that play a decisive role in structuralThe complexity of structural damping mechanisms has made this parameter to be one of the ongoing researchand nonlinear models which are described as the energy dissipation throughout viscous, material or structuralresponses plays an important role in structural identification process.In this paper model-based damping approximation method and a model-less structural input estimation are

Keywords： structural modal parameters     damping identification method     input excitation force identification     Inverse    

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Understanding and addressing the environmental risk of microplastics

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 1, doi: 10.1007/s11783-023-1612-5

Abstract: Hence, great uncertainties might exist in microplastics exposure and health risk assessment based on

Keywords： Emerging contaminants     Microplastics     Environment risk     Health effect    

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Effects of green roof damping and configuration on structural seismic response

Frontiers of Structural and Civil Engineering   Pages 1133-1144 doi: 10.1007/s11709-023-0959-9

Abstract: Hence, their structural resilience or ability to recover from natural events must be considered comprehensively, nonlinear time-history analyses are conducted on a three-story building in SAP2000 to monitor the structuralThe increased damping in the green roof soil is beneficial to the structural performance, i.e., it reducesAdditionally, certain configurations are more effective and beneficial to the structural response thanBased on the findings of this study, new methods of modeling and considering green roofs in structural

Keywords： green infrastructure     green roof     structural resilience     seismic design    

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Title Author Date Type Operation

Fault classification and reconfiguration of distribution systems using equivalent capacity margin method

K. Sathish KUMAR, T. JAYABARATHI

Journal Article

Structural risk analysis of trans-oceanic suspension bridges

Zhang Qiang,Ma Jinghai

Journal Article

Distributed governance of Solar Radiation Management geoengineering: A possible solution to SRM’s “free-driver

Andrew LOCKLEY

Journal Article

Mechanism on minimization of excess sludge in oxic-settling-anaerobic (OSA) process

WANG Jianfang, ZHAO Qingliang, JIN Wenbiao, LIN Jikan

Journal Article

Optimization of cold-end system of thermal power plants based on entropy generation minimization

Journal Article

Power system reconfiguration and loss minimization for a distribution systems using “Catfish PSO” algorithm

K Sathish KUMAR,S NAVEEN

Journal Article

Robust design approach to the minimization of functional performance variations of products and systems

J. ZHANG, H. DU, D. XUE, P. GU

Journal Article

Security of solar radiation management geoengineering

Andrew LOCKLEY

Journal Article

Optimal operation of energy at hydrothermal power plants by simultaneous minimization of pollution and

Homayoun EBRAHIMIAN,Bahman TAHERI,Nasser YOUSEFI

Journal Article

Fragility assessment of wood sheathing panels and roof-to-wall connections subjected to wind loading

Journal Article

Forward osmosis coupled with lime-soda ash softening for volume minimization of reverse osmosis

Jiandong Lu, Shijie You, Xiuheng Wang

Journal Article

Electromagnetic modeling and control of switched reluctance motor using finite elements

Ali ARIF,Abderrazak GUETTAF,Ahmed Chaouki MEGHERBI,Said BENRAMACHE,Fateh BENC HABANE

Journal Article

Approximation of structural damping and input excitation force

Mohammad SALAVATI

Journal Article

Understanding and addressing the environmental risk of microplastics

Journal Article

Effects of green roof damping and configuration on structural seismic response

Journal Article