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Optimal operation of energy at hydrothermal power plants by simultaneous minimization of pollution and costs using improved ABC algorithm

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 byIn this type of optimization problem, all practical constraints of units were taken into account as muchThese constraints include the maximum and minimum output power of units, the constraints caused by the

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

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Pragmatic multi-stage simulated annealing for optimal placement of synchrophasor measurement units in

Pathirikkat GOPAKUMAR,M. JAYA BHARATA REDDY,Dusmata Kumar MOHANTA

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 148-161 doi: 10.1007/s11708-015-0344-z

Abstract: Advanced real time monitoring is facilitated by incorporating synchrophasor measurement units such asphasor measurement units (PMUs) to the power grid monitoring system.Several physical and economic constraints limit the deployment of PMUs in smart power grids.Moreover, the method of integrating practical phasor measurement unit (PMU) placement conditions likeproposed methodology has been validated through simulation studies in IEEE standard bus systems and practical

Keywords： phasor measurement units (PMUs)     pragmatic PMU placement     simulated annealing (SA)     western region Indian    

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The development trend and practical innovation of smart cities under the integration of new technologies

Xiaohong CHEN

Frontiers of Engineering Management 2019, Volume 6, Issue 4,   Pages 485-502 doi: 10.1007/s42524-019-0057-9

Abstract: These cities have conducted practical innovations and typical cases in many sectors, such as in government

Keywords： new technology integration     smart city     big data     practical innovation    

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Flocculation behaviors of a novel papermaking sludge-based flocculant in practical printing and dyeing

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-021-1390-x

Abstract:

•PSBF performed better than PAC and PAM in CODCr removals.

Keywords： Practical wastewater treatment     Commercial coagulant/flocculant     Secondary coagulation-flocculation process    

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Distribution and potential ecological risk of heavy metals in the typical eco-units of Haihe River Basin

Jingling LIU,Tao YANG,Qiuying CHEN,Feng LIU,Binbin WANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 103-113 doi: 10.1007/s11783-014-0686-5

Abstract: distribution and characteristics of seven heavy metals in sediments located in the typical ecological units(eco-units) (e.g., rivers, lakes, and estuaries) of Haihe River Basin were analyzed.The results indicated that the concentration scales of As, Hg, Cr, Cd, Pb, Cu, and Zn in the eco-unitsThe risk order of the typical eco-units are as follows: Zhangweinan River (2278345.68)>Estuary (161914.74

Keywords： Haihe River Basin     ecological risk     eco-units     heavy metals    

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Reliability prediction and its validation for nuclear power units in service

Jinyuan SHI,Yong WANG

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 479-488 doi: 10.1007/s11708-016-0425-7

Abstract: In this paper a novel method for reliability prediction and validation of nuclear power units in serviceUsing these factors, the equivalent availability factor of nuclear power units in the following 3 yearsFurthermore, the reliability prediction method is validated using the nuclear power units in North Americanis found that the relative errors of the predicted equivalent availability factors for nuclear power unitsthus providing effective reliability management and maintenance optimization methods for nuclear power units

Keywords： nuclear power units in service     reliability     reliability prediction     equivalent availability factors    

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P2P energy trading via public power networks: Practical challenges, emerging solutions, and the way forward

Frontiers in Energy 2023, Volume 17, Issue 2,   Pages 189-197 doi: 10.1007/s11708-023-0873-9

Abstract: In this paper, the practical challenges of conducting P2P energy trading via public power networks areidentified and presented, based on the analysis of a practical Local Virtual Private Networks (LVPNs

Keywords： distribution network     local virtual private network     network charges     peer-to-peer (P2P) energy trading     practical    

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Capacity limitation of nuclear units in grid based on analysis of frequency regulation

Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 148-154 doi: 10.1007/s11708-012-0174-1

Abstract: The increasing capacity of nuclear units in power grid poses threat to system stability and security.Load disturbance may cause overspeed of the units and trigger the overspeed protection controller (OPCBased on the analysis of frequency regulation, mathematic models for nuclear units in the grid are establishedThe critical action of the OPC is proposed as the constraint of safe operation for the units.This research can help to estimate the capacity limitation of nuclear units in the grid.

Keywords： nuclear units capacity     overspeed     primary frequency control (PFC)     second frequency control (SFC)    

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Analysis of inventory level under procurement constraints in supply chain

CHANG Guangshu

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3,   Pages 361-363 doi: 10.1007/s11465-007-0063-1

Abstract: Then, the change of the inventory level with and without the procurement constraints is analyzed, and

Keywords： supply     efficient reduction     system     expectation     procurement    

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A reliable and practical reference objective for the deviation diagnosis of energy system parameters

Liping LI, Zheng LI,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 440-445 doi: 10.1007/s11708-009-0051-8

Abstract: The core objective to optimize a complex energy system is to set the reference target to guide the parameter adjustment of system operation. In this paper, a new case-based approach is proposed based on an online performance assessment program and its long-term operation data for a large power unit. The online model of a coal-fired power unit’s performance assessment is demonstrated, and the distribution pattern of the performance index is revealed by statistical analysis of the abundant data. The fundamental issues (representation of the similarity of two thermal processes, similarity measure, etc.) are tackled. The key sections and key parameters for the completion of similarity determination are proposed, which are essential to realize a case-based strategy. A full-scope simulator of power unit is used to test the availability of the method. The advantage of the case-based approach is the integrality of information over other methods.

Keywords： energy system     case-based     optimization     power unit operation     performance    

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Innovation, practical benefits and prospects for the future development of automatic milking systems

Hongzhe JIANG,Wei WANG,Chunyang LI,Wei WANG

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 1,   Pages 37-47 doi: 10.15302/J-FASE-2016117

Abstract: Nevertheless, this innovation has not been reviewed comprehensively and the practical benefits of AMS

Keywords： automatic milking systems (AMS)     innovation     milking machine     practical effect     future prospects    

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models to explore the solution space of large nonlinear systems underlying flowsheet simulations with constraints

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 183-197 doi: 10.1007/s11705-021-2073-7

Abstract: industrial scale require the solution of large systems of nonlinear equations, so that solvability becomes a practicalAdditional constraints from technical, economic, environmental, and safety considerations may furtherA priori, the design variable domains for which a simulation converges and fulfills the imposed constraintsHowever, that approach only considers the exploration of the convergent domain and ignores additional constraintsIn this paper, we present an improvement which particularly takes the fulfillment of constraints into

Keywords： machine learning     flowsheet simulations     constraints     exploration    

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Resilience strategies for sustainable supply chains under budget constraints in the post COVID-19 era

Frontiers of Engineering Management   Pages 143-157 doi: 10.1007/s42524-022-0236-y

Abstract: Therefore, the design of resilience solutions needs to fully consider the constraints of budgetary costsMost of the existing related literature only discusses optimal resilience solutions under certain cost constraintssatisfaction as indicators, to determine the changing laws of optimal resilience strategies when cost constraints

Keywords： sustainable supply chain     customer requirement     resilience efficiency     customer satisfaction     budget constraint    

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Energy conservation in China’s coal-fired power industry by installing advanced units and organized phasing

Weiliang WANG, Junfu LYU, Zheng LI, Hai ZHANG, Guangxi YUE, Weidou NI

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 798-807 doi: 10.1007/s11708-019-0633-z

Abstract: Coal-fired power is the main power source and the biggest contributor to energy conservation in the past several decades in China. It is generally believed that advanced technology should be counted on for energy conservation. However, a review of the decline in the national average net coal consumption rate (NCCR) of China’s coal-fired power industry along with its development over the past few decades indicates that the up-gradation of the national unit capacity structure (including installing advanced production and phasing out backward production) plays a more important role. A quantitative study on the effect of the unit capacity structure up-gradation on the decline in the national average NCCR suggests that phasing out backward production is the leading factor for the decline in the NCCR in the past decade, followed by the new installation, whose sum contributes to approximately 80% of the decline in the national average NCCR. The new installation has an effective affecting period of about 8 years, during which it would gradually decline from a relatively high value. Since the effect of phasing out backward production may remain at a certain degree given a continual action of phasing out backward capacity, it is suggested that the organized action of phasing out backward production should be insisted on.

Keywords： coal-fired power     energy conservation     net coal consumption rate     new installation     phasing out backward production     unit capacity structure    

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Environmental pollution and DNA methylation: carcinogenesis, clinical significance, and practical applications

Yi Cao

Frontiers of Medicine 2015, Volume 9, Issue 3,   Pages 261-274 doi: 10.1007/s11684-015-0406-y

Abstract:

Environmental pollution is one of the main causes of human cancer. Exposures to environmental carcinogens result in genetic and epigenetic alterations which induce cell transformation. Epigenetic changes caused by environmental pollution play important roles in the development and progression of environmental pollution-related cancers. Studies on DNA methylation are among the earliest and most conducted epigenetic research linked to cancer. In this review, the roles of DNA methylation in carcinogenesis and their significance in clinical medicine were summarized, and the effects of environmental pollutants, particularly air pollutants, on DNA methylation were introduced. Furthermore, prospective applications of DNA methylation to environmental pollution detection and cancer prevention were discussed.

Keywords： environmental pollution     DNA methylation     cancer     biomarker     diagnosis     therapy     prevention    

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Title Author Date Type Operation

Optimal operation of energy at hydrothermal power plants by simultaneous minimization of pollution and costs using improved ABC algorithm

Homayoun EBRAHIMIAN,Bahman TAHERI,Nasser YOUSEFI

Journal Article

Pragmatic multi-stage simulated annealing for optimal placement of synchrophasor measurement units in

Pathirikkat GOPAKUMAR,M. JAYA BHARATA REDDY,Dusmata Kumar MOHANTA

Journal Article

The development trend and practical innovation of smart cities under the integration of new technologies

Xiaohong CHEN

Journal Article

Flocculation behaviors of a novel papermaking sludge-based flocculant in practical printing and dyeing

Journal Article

Distribution and potential ecological risk of heavy metals in the typical eco-units of Haihe River Basin

Jingling LIU,Tao YANG,Qiuying CHEN,Feng LIU,Binbin WANG

Journal Article

Reliability prediction and its validation for nuclear power units in service

Jinyuan SHI,Yong WANG

Journal Article

P2P energy trading via public power networks: Practical challenges, emerging solutions, and the way forward

Journal Article

Capacity limitation of nuclear units in grid based on analysis of frequency regulation

Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN

Journal Article

Analysis of inventory level under procurement constraints in supply chain

CHANG Guangshu

Journal Article

A reliable and practical reference objective for the deviation diagnosis of energy system parameters

Liping LI, Zheng LI,

Journal Article

Innovation, practical benefits and prospects for the future development of automatic milking systems

Hongzhe JIANG,Wei WANG,Chunyang LI,Wei WANG

Journal Article

models to explore the solution space of large nonlinear systems underlying flowsheet simulations with constraints

Journal Article

Resilience strategies for sustainable supply chains under budget constraints in the post COVID-19 era

Journal Article

Energy conservation in China’s coal-fired power industry by installing advanced units and organized phasing

Weiliang WANG, Junfu LYU, Zheng LI, Hai ZHANG, Guangxi YUE, Weidou NI

Journal Article

Environmental pollution and DNA methylation: carcinogenesis, clinical significance, and practical applications

Yi Cao

Journal Article