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Research on pedestrian escape route without visibility based on Markov chain model

Xiaoping ZHENG, Lijuan DU, Hongjiang WANG,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 283-289 doi: 10.1007/s11705-009-0272-8

Abstract: based on the Markov chain probability transition matrix, the algorithms with random numbers and the spatial-grid

Keywords： pioneering     direction     spatial-grid     realistic     transition characteristic    

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Application of cable-supported spatial grid in dry coal shed

XING Haidong, HAO Jiping, XU Guobin

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 1,   Pages 26-29 doi: 10.1007/s11709-008-0008-8

Abstract: This paper presented a new structural style cable-supported spatial grid, which was applied in largeThe results show that the cable-supported spatial grid can maximize the use of material strength, and

Keywords： dry     material strength     low     rational configuration     influence    

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Development of new systems of reinforced concrete　spatial grid structure in China

Ma Kejian,Zhang Huagang,Xiao Jianchun,Lu Yaqin

Strategic Study of CAE 2008, Volume 10, Issue 8,   Pages 22-34

Abstract:

Reinforced concrete spatial grid structure includes planar open-web gridstructure, open-web sandwich plate structure, open-web dual grid structure, cast-in-place concrete roundthrough bending the reinforced concrete open-web sandwich plate structure by the two directions These new spatialgrid structure systems have the proprietary intellectual property rights of our country and have their

Keywords： reinforced concrete     open-web sandwich plate     cast-in-place concrete round eye hollow plate     grid structure    

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Optimal placement of PMUs for the smart grid implementation in Indian power grid—A case study

Pathirikkat GOPAKUMAR, G. Surya CHANDRA, M. Jaya Bharata REDDY, Dusmata Kumar MOHANTA

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 358-372 doi: 10.1007/s11708-013-0257-7

Abstract: The concept of smart grid (SG) can provide a highly reliable power system with optimized utilizationThe present Indian power grid requires revolutionary changes to meet the growing demands and to makethe grid smarter and reliable.for SG is the instantaneous monitoring of the voltage, current and power flows at all buses in the gridThis paper proposes the optimal geographical locations for the PMUs in southern region Indian power grid

Keywords： phasor measurement units (PMUs)     smart grid (SG)     southern region Indian power grid (SRIPG)     integer linear    

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Optimal redundant placement of PMUs in Indian power grid — northern, eastern and north-eastern regions

Pathirikkat GOPAKUMAR, G. Surya CHANDRA, M. Jaya Bharata REDDY, Dusmata Kumar MOHANTA

Frontiers in Energy 2013, Volume 7, Issue 4,   Pages 413-428 doi: 10.1007/s11708-013-0274-6

Abstract: This can be envisioned through the implementation of concepts of smart grid (SG).One of the key requisites for SG implementation is that the grid should be completely observable.Renovation of conventional Indian power grid to a SG necessitates incorporation of the phasor measurementunits (PMUs) in the present power grid measurement and monitoring system.The results proposed in this paper can be a stepping stone for revamping the Indian power grid to a SG

Keywords： phasor measurement unit (PMU)     smart grid (SG)     Indian power grid     northern region Indian power grid (NRIPG)     eastern region Indian power grid (ERIPG)     north-eastern region Indian power grid (NERIPG)     redundancy    

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Soil spatial variability impact on the behavior of a reinforced earth wall

Adam HAMROUNI, Daniel DIAS, Badreddine SBARTAI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 518-531 doi: 10.1007/s11709-020-0611-x

Abstract: This article presents the soil spatial variability effect on the performance of a reinforced earth wallThe influences of the spatial variability response of the geotechnical system in terms of horizontalThe results obtained show that the spatial variability has an important influence on the facing horizontal

Keywords： reinforced earth wall     geosynthetic     random field     spatial variability     Monte Carlo simulation    

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Border-search and jump reduction method for size optimization of spatial truss structures

Babak DIZANGIAN, Mohammad Reza GHASEMI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 123-134 doi: 10.1007/s11709-018-0478-2

Abstract: This paper proposes a sensitivity-based border-search and jump reduction method for optimum design of spatialSpatial truss problems were attempted for optimization in order to show the fastness and efficiency of

Keywords： optimum design     sensitivity analysis     reduction method     spatial trusses     OpenSees    

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Exploration on electrical resistance tomography in characterizing the slurry spatial distribution in

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 3,   Pages 365-379 doi: 10.1007/s11709-024-1049-3

Abstract: investigated the application of electrical resistance tomography (ERT) in characterizing the slurry spatialTherefore, it is usually infeasible to evaluate the grouting effect or monitor the slurry spatial distribution

Keywords： electrical resistance tomography     cemented granular material     grouting     spatial distribution     Archie’    

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Spatial prediction of soil contamination based on machine learning: a review

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1693-1

Abstract:

● A review of machine learning (ML) for spatial prediction of soil

Keywords： Soil contamination     Machine learning     Prediction     Spatial distribution    

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Hybrid optimization algorithm for modeling and management of micro grid connected system

Kallol ROY,Kamal Krishna MANDAL

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 305-314 doi: 10.1007/s11708-014-0308-8

Abstract: In this paper, a hybrid optimization algorithm is proposed for modeling and managing the micro grid (

Keywords： micro grid (MG)     multi-objective function     artificial bee colony (ABC)     fuel cost     operation and maintenance    

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Urban spatial cluster structure in metro travel networks: An explorative study of Wuhan using big and

Frontiers of Engineering Management 2024, Volume 11, Issue 2,   Pages 231-246 doi: 10.1007/s42524-024-0296-2

Abstract: However, existing research on transit-oriented development (TOD) rarely explores the spatial interactionsThe results reveal that the planned sub-centers align reasonably well with the optimal spatial clustersin terms of spatial configuration.However, the actual spatial clusters tend to have longer internal travel times compared to the optimalFurther exploration suggests the need for equalizing land use density within planned spatial clusters

Keywords： urban spatial clusters     metro travel flows     land use     metro smartcard data     Wuhan    

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Sensitivity of optimal double-layer grid designs to geometrical imperfections and geometric nonlinearity

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 8,   Pages 1209-1224 doi: 10.1007/s11709-024-1062-6

Abstract: This study focuses on exploring the effects of geometrical imperfections and different analysis methods on the optimum design of Double-Layer Grids (DLGs), as used in the construction industry. A total of 12 notable meta-heuristics are assessed and contrasted, and as a result, the Slime Mold Algorithm is identified as the most effective approach for size optimization of DLGs. To evaluate the influence of geometric imperfections and nonlinearity on the optimal design of real-size DLGs, the optimization process is carried out by considering and disregarding geometric nonlinearity while incorporating three distinct forms of geometrical imperfections, namely local imperfections, global imperfections, and combinations of both. In light of the uncertain nature of geometrical imperfections, probabilistic distributions are used to define these imperfections randomly in direction and magnitude. The results demonstrate that it is necessary to account for these imperfections to obtain an optimal solution. It’s worth noting that structural imperfections can increase the maximum stress ratio by up to 70%. The analysis also reveals that the initial curvature of members has a more significant impact on the optimal design of structures than the nodal installation error, indicating the need for greater attention to local imperfection issues in space structure construction.

Keywords： double-layer grid     sizing optimization     metaheuristic algorithms     geometrical imperfections     analysis    

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System resilience enhancement: Smart grid and beyond

Gang HUANG, Jianhui WANG, Chen CHEN, Chuangxin GUO, Bingquan ZHU

Frontiers of Engineering Management 2017, Volume 4, Issue 3,   Pages 271-282 doi: 10.15302/J-FEM-2017030

Abstract: Boosting the resilience of power systems is a core requirement of smart grids. In fact, resilience enhancement is crucial to all critical infrastructure systems. In this study, we review the current research on system resilience enhancement within and beyond smart grids. In addition, we elaborate on resilience definition and resilience quantification and discuss several challenges and opportunities for system resilience enhancement. This study aims to deepen our understanding of the concept of resilience and develop a wide perspective on enhancing the system resilience for critical infrastructures.

Keywords： critical infrastructure     cyber-physical systems     energy systems     resilience     smart grid    

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Biologically inspired model of path integration based on head direction cells and grid cells

Yang ZHOU,De-wei WU

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 5,   Pages 435-448 doi: 10.1631/FITEE.1500364

Abstract: The firing of head direction cells (HDCs) and grid cells (GCs) is related to the moving direction and

Keywords： Head direction cells (HDCs)     Grid cells (GCs)     Path integration     Bionic navigation    

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Integration of renewable energies, flexible loads and storages into the German power grid: Actual situation

Harald SCHWARZ, Xiaoshu CAI

Frontiers in Energy 2017, Volume 11, Issue 2,   Pages 107-118 doi: 10.1007/s11708-017-0470-x

Abstract: attractive over-funding, more than 1.5 million renewable generation units were connected to the German gridAccording to the EEG, renewable generation units can feed to the grid wherever they are located and whenevertolerable loading of lines or transformers respectively endangers the system stability in total, are German gridTherefore, a tremendous change is needed within the German power grid.

Keywords： grid integration     renewable energies     system stability     storages     flexible loads     new market design    

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Title Author Date Type Operation

Research on pedestrian escape route without visibility based on Markov chain model

Xiaoping ZHENG, Lijuan DU, Hongjiang WANG,

Journal Article

Application of cable-supported spatial grid in dry coal shed

XING Haidong, HAO Jiping, XU Guobin

Journal Article

Development of new systems of reinforced concrete　spatial grid structure in China

Ma Kejian,Zhang Huagang,Xiao Jianchun,Lu Yaqin

Journal Article

Optimal placement of PMUs for the smart grid implementation in Indian power grid—A case study

Pathirikkat GOPAKUMAR, G. Surya CHANDRA, M. Jaya Bharata REDDY, Dusmata Kumar MOHANTA

Journal Article

Optimal redundant placement of PMUs in Indian power grid — northern, eastern and north-eastern regions

Pathirikkat GOPAKUMAR, G. Surya CHANDRA, M. Jaya Bharata REDDY, Dusmata Kumar MOHANTA

Journal Article

Soil spatial variability impact on the behavior of a reinforced earth wall

Adam HAMROUNI, Daniel DIAS, Badreddine SBARTAI

Journal Article

Border-search and jump reduction method for size optimization of spatial truss structures

Babak DIZANGIAN, Mohammad Reza GHASEMI

Journal Article

Exploration on electrical resistance tomography in characterizing the slurry spatial distribution in

Journal Article

Spatial prediction of soil contamination based on machine learning: a review

Journal Article

Hybrid optimization algorithm for modeling and management of micro grid connected system

Kallol ROY,Kamal Krishna MANDAL

Journal Article

Urban spatial cluster structure in metro travel networks: An explorative study of Wuhan using big and

Journal Article

Sensitivity of optimal double-layer grid designs to geometrical imperfections and geometric nonlinearity

Journal Article

System resilience enhancement: Smart grid and beyond

Gang HUANG, Jianhui WANG, Chen CHEN, Chuangxin GUO, Bingquan ZHU

Journal Article

Biologically inspired model of path integration based on head direction cells and grid cells

Yang ZHOU,De-wei WU

Journal Article

Integration of renewable energies, flexible loads and storages into the German power grid: Actual situation

Harald SCHWARZ, Xiaoshu CAI

Journal Article