Resource Type

Journal Article 92

Conference Videos 3

Year

2023 11

2022 8

2021 6

2020 8

2019 4

2018 9

2017 9

2016 4

2015 5

2013 4

2012 4

2011 1

2010 2

2008 4

2007 5

2006 5

2005 1

2004 2

2001 1

2000 1

open ︾

Keywords

wind loads 4

aerodynamics 2

demand response 2

low-rise building 2

numerical simulation 2

3-RR parallel 1

3D printing 1

Academy 1

Anaerobic digestion 1

Architecture 1

Artificial intelligence 1

Assembly variation analysis 1

Available transfer capability 1

Balanced bandpass filter (BPF) 1

Ballast 1

Bending structure surfaces 1

Bio-composites 1

Boundary control 1

Bridge design 1

open ︾

Search scope:

排序： Display mode:

Possible role of power-to-heat and power-to-gas as flexible loads in German medium voltage networks

Mark KUPRAT, Martin BENDIG, Klaus PFEIFFER

Frontiers in Energy 2017, Volume 11, Issue 2,   Pages 135-145 doi: 10.1007/s11708-017-0472-8

Abstract: This curtailment of RES leads to economic losses and could be avoided through flexible loads.

Keywords： power-to-gas     power-to-heat     flexible loads     ancillary services     coherent energy systems    

HTML PDF Collect

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: Starting from the late 1990’s, the German government decided to change the national electric power supply system dramatically. The main stimulating instrument was the German Law on Renewable Energies (Erneuerbare Energien Gesetz (EEG)), which guaranteed a fixed feed-in tariff to everyone who was willing to invest into renewable generation. Based on the year of commissioning, defined revenues per kWh were fixed for the next 20 years. Due to a very attractive over-funding, more than 1.5 million renewable generation units were connected to the German grid up to the end of 2015. According to the EEG, renewable generation units can feed to the grid wherever they are located and whenever they are able to produce. The old physical principle was and is still neglected, which clearly stated that generation always has to follow the demand—simply due to the limited availability of storages in the power system. Only in cases, when temporarily renewable overproduction exceeds the tolerable loading of lines or transformers respectively endangers the system stability in total, are German grid operators allowed to announce curtailments by emergency measures. Even in such cases, the “not produced energy” from renewable sources has to be funded. Although the installed capacity from renewables is much higher than the peak load in Germany, it contributes only about 32% to German average annual energy. Unfortunately, the regional distribution of renewable generation and load is very different, e.g. in the northeast of Germany, this Renewable Energy (RE)-ratio meanwhile exceeds 100% due to the high RE-penetration and low load. High transits of renewable overproduction from the north to the south will be necessary at nearly every day per year. Therefore, a tremendous change is needed within the German power grid. This paper will give a first overview followed by several others, describing possible solutions on how to overcome this critical situation.

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

HTML PDF Collect

Possible role of power-to-vehicle and vehicle-to-grid as storages and flexible loads in the German 110

Erik BLASIUS

Frontiers in Energy 2017, Volume 11, Issue 2,   Pages 146-154 doi: 10.1007/s11708-017-0475-5

Abstract: power-to-vehicle (P2V), vehicle-to-grid (V2G) is discussed as one of the possible development concepts for the flexible

Keywords： P2V     V2G     grid integration     electric vehicles     distribution grid    

HTML PDF Collect

Fully Flexible Loads in Distributed Energy Management: PV, Batteries, Loads and Value Stacking in Virtual

Andrew Mears, James Martin

Engineering 2020, Volume 6, Issue 7,   Pages 736-738 doi: 10.1016/j.eng.2020.07.004

HTML PDF Collect

Demand Flexibility of Residential Buildings: Definitions, Flexible Loads, and Quantification Methods Review

Zhengyi Luo, Jinqing Peng, Jingyu Cao, Rongxin Yin, Bin Zou, Yutong Tan, Jinyue Yan

Engineering 2022, Volume 16, Issue 9,   Pages 123-140 doi: 10.1016/j.eng.2022.01.010

Abstract: loads, and quantification methods.loads are summarized and compared.Models and evaluation indicators to quantify the flexibility of these flexible loads are reviewed andThese flexible loads are different in running modes, usage frequencies, seasons, and capabilities forloads in different situations.

Keywords： Residential building     Demand flexibility     Flexible loads     Modeling techniques     Quantification indicators    

HTML PDF Collect

Experimental study of wind loads on gable roofs of low-rise buildings with overhangs

Peng HUANG, Ling TAO, Ming GU, Yong QUAN

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 3,   Pages 300-317 doi: 10.1007/s11709-018-0449-7

Abstract:

Gable roofs with overhangs (eaves) are the common constructions of low-rise buildings on the southeastern coast of China, and they were vulnerable to typhoons from experience. The wind pressure distributions on gable roofs of low-rise buildings are investigated by a series of wind tunnel tests which consist of 99 test cases with various roof pitches, height-depth ratios and width-depth ratios. The block pressure coefficients and worst negative (block) pressure coefficients on different roof regions of low-rise buildings are proposed for the main structure and building envelope, respectively. The effects of roof pitch, height-depth ratio, and width-depth ratio on the pressure coefficients of each region are analyzed in detail. In addition, the pressure coefficients on the roofs for the main structure and building envelope are fitted according to roof pitch, height-depth ratio and width-depth ratio of the low-rise building. Meanwhile, the rationality of the fitting formulas is verified by comparing the fitting results with the codes of different countries. Lastly, the block pressure coefficients and worst negative pressure coefficients are recommended to guide the design of low-rise buildings in typhoon area and act as references for the future’s modification of wind load codes.

Keywords： low-rise building     gable roof     wind loads     wind tunnel test     block pressure coefficient     load code    

HTML PDF Collect

Piezoelectric pump with flexible venous valves for active cell transmission

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0712-4

Abstract: In this study, we designed a piezoelectric pump with a flexible venous valve inspired by that of humanscomputational model of the electric-solid-liquid multi-physical field coupling of the piezoelectric pump with a flexible

Keywords： venous valve     flexible venous valve     cell transmission     organ-on-a-chip system     piezoelectric device    

HTML PDF Collect

Creation and integration mechanism of instrumentation flexible developing system

Xiaoli XU, Qiushuang LIU

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 235-240 doi: 10.1007/s11465-011-0122-5

Abstract: development (R&D) of modern instrumentation products, based on the concept of an instrumentation flexibledeveloping system (IFDS), this paper discusses the creation and open flexible integration mechanism,perfects the integrated supporting environment and integrated system of the flexible interconnection, and constructs the new flexible integrated system.

Keywords： modern instrumentation developing     flexible interconnection     flexible integration mechanism     rapid integration    

HTML PDF Collect

Review on flexible perovskite photodetector: processing and applications

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-023-0749-z

Abstract: Next-generation optoelectronics should possess lightweight and flexible characteristics, thus conformingFlexible photodetectors as fundamental devices have been receiving increasing attention owing to theirTypical applications of perovskite-based flexible photodetectors such as optical communication, imageChallenges and future research directions of perovskite-based flexible photodetectors are proposed in, but also to serve as the roadmap for further developments of flexible photodetectors and exploring

Keywords： photodetector     perovskite     flexible     processing     application    

HTML PDF Collect

A review of the scalable nano-manufacturing technology for flexible devices

Wenbin HUANG,Xingtao YU,Yanhua LIU,Wen QIAO,Linsen CHEN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 99-109 doi: 10.1007/s11465-017-0416-3

Abstract: we summarize the status and the limitations of current nano-patterning techniques for scalable and flexible

Keywords： flexible nano-manufacturing     flexible devices     nanofabrication     scalability    

HTML PDF Collect

Analytical dynamic solution of a flexible cable-suspended manipulator

Mahdi BAMDAD

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 350-359 doi: 10.1007/s11465-013-0271-9

Abstract:

Cable-suspended manipulators are used in large scale applications with, heavy in weight and long in span cables. It seems impractical to maintain cable assumptions of smaller robots for large scale manipulators. The interactions among the cables, platforms and actuators can fully evaluate the coupled dynamic analysis. The structural flexibility of the cables becomes more pronounced in large manipulators. In this paper, an analytic solution is provided to solve cable vibration. Also, a closed form solution can be adopted to improve the dynamic response to flexibility. The output is provided by the optimal torque generation subject to the actuator limitations in a mechatronic sense. Finally, the performance of the proposed algorithm is examined through simulations.

Keywords： parallel robot     flexible cable     suspended robot     dynamic    

HTML PDF Collect

Dynamics Modeling of Spacecraft with Composite Flexible Structures

Qu Guangji,Cheng Daosheng

Strategic Study of CAE 1999, Volume 1, Issue 2,   Pages 52-56

Abstract:

It is a conventional method to build dynamic models of flexible spacecraft with hybrid coordinatesRigid main body is attached by flexible module, to which kinds of large flexible appendages are fixedThe flexible multi-modules main body, taking on a lower stiffness, and several kinds of large flexibleappendages attached to it make the whole spacecraft as an all-flexible structure system.some of its flexible appendages are not fixed to the rigid main body directly.

Keywords： spacecraft     composite flexible structure     dynamics of flexible structures     hybrid coordinate method    

HTML PDF Collect

Unified solution of limit loads of thick wall cylinder subject to external pressure considering strain

CHEN Changfu, XIAO Shujun, YANG Yu

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 329-333 doi: 10.1007/s11709-007-0043-x

Abstract: strain softening materials, such as concrete or rock, was derived, and the elastic and plastic limit loadsIn addition, the influence of some factors on the limit loads of such cylinders as the ratio of the external
HTML PDF Collect

Estimation of flexible pavement structural capacity using machine learning techniques

Nader KARBALLAEEZADEH, Hosein GHASEMZADEH TEHRANI, Danial MOHAMMADZADEH SHADMEHRI, Shahaboddin SHAMSHIRBAND

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1083-1096 doi: 10.1007/s11709-020-0654-z

Abstract: process regression, M5P model tree, and random forest used for the prediction of structural numbers in flexibleDataset of this paper is related to 759 flexible pavement sections at Semnan and Khuzestan provinces

Keywords： transportation infrastructure     flexible pavement     structural number prediction     Gaussian process regression    

HTML PDF Collect

Applications of thermostatically controlled loads for demand response with the proliferation of variable

Meng SONG, Wei SUN

Frontiers in Energy 2022, Volume 16, Issue 1,   Pages 64-73 doi: 10.1007/s11708-021-0732-5

Abstract: Thermostatically controlled loads (TCLs) attract tremendous attentions because of their specific thermal

Keywords： thermostatically controlled load     demand response     renewable energy     power system operation    

HTML PDF Collect

Title Author Date Type Operation

Possible role of power-to-heat and power-to-gas as flexible loads in German medium voltage networks

Mark KUPRAT, Martin BENDIG, Klaus PFEIFFER

Journal Article

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

Harald SCHWARZ, Xiaoshu CAI

Journal Article

Possible role of power-to-vehicle and vehicle-to-grid as storages and flexible loads in the German 110

Erik BLASIUS

Journal Article

Fully Flexible Loads in Distributed Energy Management: PV, Batteries, Loads and Value Stacking in Virtual

Andrew Mears, James Martin

Journal Article

Demand Flexibility of Residential Buildings: Definitions, Flexible Loads, and Quantification Methods

Zhengyi Luo, Jinqing Peng, Jingyu Cao, Rongxin Yin, Bin Zou, Yutong Tan, Jinyue Yan

Journal Article

Experimental study of wind loads on gable roofs of low-rise buildings with overhangs

Peng HUANG, Ling TAO, Ming GU, Yong QUAN

Journal Article

Piezoelectric pump with flexible venous valves for active cell transmission

Journal Article

Creation and integration mechanism of instrumentation flexible developing system

Xiaoli XU, Qiushuang LIU

Journal Article

Review on flexible perovskite photodetector: processing and applications

Journal Article

A review of the scalable nano-manufacturing technology for flexible devices

Wenbin HUANG,Xingtao YU,Yanhua LIU,Wen QIAO,Linsen CHEN

Journal Article

Analytical dynamic solution of a flexible cable-suspended manipulator

Mahdi BAMDAD

Journal Article

Dynamics Modeling of Spacecraft with Composite Flexible Structures

Qu Guangji,Cheng Daosheng

Journal Article

Unified solution of limit loads of thick wall cylinder subject to external pressure considering strain

CHEN Changfu, XIAO Shujun, YANG Yu

Journal Article

Estimation of flexible pavement structural capacity using machine learning techniques

Nader KARBALLAEEZADEH, Hosein GHASEMZADEH TEHRANI, Danial MOHAMMADZADEH SHADMEHRI, Shahaboddin SHAMSHIRBAND

Journal Article

Applications of thermostatically controlled loads for demand response with the proliferation of variable

Meng SONG, Wei SUN

Journal Article