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Topology optimization of piezoelectric bi-material actuators with velocity feedback control

Mariana MORETTI, Emílio C. N. SILVA

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 2,   Pages 190-200 doi: 10.1007/s11465-019-0537-y

Abstract: discoveries on manufacturing materials have encouraged researchers to investigate the appearance of materialThe bi-material and multifunctional concepts are considered for the design of a controlled piezoelectricThe bi-material piezoelectric actuator (BPEA) has its metallic host layer designed by the TOM, which

Keywords： topology optimization method     bi-material piezoactuator     active velocity feedback control     time-domain transient    

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Performance of a bi-layer solar steam generation system working at a high-temperature of top surface

Jinxin ZHONG, Congliang HUANG

Frontiers in Energy 2023, Volume 17, Issue 1,   Pages 141-148 doi: 10.1007/s11708-021-0725-4

Abstract: Many efforts have been focused on enhancing the vapor generation in bi-layer solar steam generation systemsthat the high-temperature vapor could not be obtained by enhancing the heat-insulating property of the bi-layerThis paper is expected to provide some information for designing a bi-layered system to produce high-temperature

Keywords： solar steam generation     solar energy     numerical method     porous material    

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Bi-modes alternation stepping ultrasonic motors

JIN Jiamei, ZHAO Chunsheng

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 101-105 doi: 10.1007/s11465-008-0018-1

Abstract: Two-phase sinusoidal signals corresponding to the two modal frequencies drive the motor bi-direction

Keywords： miss-step     bi-direction     Two-phase sinusoidal     positioning     accumulative    

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Acoustic characteristics of bi-directional turbines for thermoacoustic generators

Dongdong LIU, Yanyan CHEN, Wei DAI, Ercang LUO

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 1027-1036 doi: 10.1007/s11708-020-0702-3

Abstract: Bi-directional turbines combined with rotary motors may be a feasible option for developing high powerA general expression for the acoustic characteristics of the bi-directional turbine was proposed basedThe good fit of the correlations shows that these characteristics are valid for describing the bi-directional

Keywords： thermoacoustic power generator     acoustic characteristics     bi-directional impulse turbine     energy conversion    

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Cu-doped Bi/Bi2WO6 catalysts for efficient N2 fixation by photocatalysis

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1412-1422 doi: 10.1007/s11705-023-2312-1

Abstract: In this paper, Cu-doped Bi2WO6 was synthesized via a solvothermal method and appliedthat the synthesized photocatalyst is actually Bi/Cu-Bi2WO6 composite.of Bi2WO6.The optimized NH3 generation rates of Bi/Cu-Bi2WO6 reached 624 and 243/Bi2WO6, respectively.

Keywords： Bi2WO6     Cu doping     work function     photocatalytic N2 fixation     charge    

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Modeling the impact of uncertainty in emissions trading markets with bankable permits

Yongliang ZHANG, Bing ZHANG, Jun BI, Pan HE

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2,   Pages 231-241 doi: 10.1007/s11783-012-0431-x

Abstract: The various forms of uncertainty that firms may face in bankable emission permit trading markets will affect firms’ decision making as well as their market performance. This research explores the effect of increased uncertainty over future input costs and output prices on the temporal distribution of emission. In a dynamic programming setting, the permit price is a convex function of stochastic prices of coal and electricity. Increased uncertainty about future market conditions increases the expected permit price and causes a risk neutral firm to reduce ex ante emissions in order to smooth out marginal abatement costs over time. Finally, safety valves, both low-side and high-side, are suggested to reduce the impact of uncertainty in bankable emission trading markets.

Keywords： uncertainty     bankable     emission trading     market performance    

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Liquid metal material genome: Initiation of a new research track towards discovery of advanced energy

Lei WANG, Jing LIU

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 317-332 doi: 10.1007/s11708-013-0271-9

Abstract: With many superior physical properties over conventional fluids, the low melting point liquid metal materialInspired by the Material Genome Initiative as issued in 2011 by the United States of America, a morespecific and focused project initiative was proposed in this paper—the liquid metal material genome aimedThe theoretical strategies and experimental methods in the research and development of liquid metal materialParticularly, the calculation of phase diagram (CALPHAD) approach as a highly effective way for material

Keywords： liquid metal material genome     energy material     material discovery     advanced material     room-temperature liquid    

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Hybrid genetic algorithm for bi-objective resource-constrained project scheduling

Fikri KUCUKSAYACIGIL, Gündüz ULUSOY

Frontiers of Engineering Management 2020, Volume 7, Issue 3,   Pages 426-446 doi: 10.1007/s42524-020-0100-x

Abstract: In this study, we considered a bi-objective, multi-project, multi-mode resource-constrained project scheduling

Keywords： backward–forward scheduling     hybrid bi-objective genetic algorithm     injection procedure     maximum cash balance    

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Robust topology optimization of multi-material lattice structures under material and load uncertainties

Yu-Chin CHAN, Kohei SHINTANI, Wei CHEN

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 2,   Pages 141-152 doi: 10.1007/s11465-019-0531-4

Abstract: Enabled by advancements in multi-material additive manufacturing, lightweight lattice structures consistingThis work proposes a density-based robust topology optimization method for meso- or macro-scale multi-materiallattice structures under any combination of material and load uncertainties.The method utilizes a new generalized material interpolation scheme for an arbitrary number of materialsExamples of a cantilever beam lattice structure under various material and load uncertainty cases exhibit

Keywords： robust topology optimization     lattice structures     multi-material     material uncertainty     load uncertainty    

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Visible-light-driven heterostructured g-CN/Bi-TiO floating photocatalyst with enhanced charge carrier

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1417-3

Abstract:

• Bi doping in TiO2 enhanced the separation of photo-generated

Keywords： Bi doping     Visible light     Algal removal     Charge carrier separation    

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Conversion of phenol to cyclohexane in the aqueous phase over Ni/zeolite bi-functional catalysts

Jimei Zhang, Fuping Tian, Junwen Chen, Yanchun Shi, Hongbin Cao, Pengge Ning, Shanshan Sun, Yongbing Xie

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 288-298 doi: 10.1007/s11705-020-1932-y

Abstract: A series of Ni/HZSM-5 and Ni/HIM-5 bi-functional catalysts were synthesized and applied to the aqueous-phaseImportantly, the Ni/HIM-5 bi-functional catalyst exhibited a high activity (98.3%) and high selectivity

Keywords： aqueous-phase hydrodeoxygenation     phenol     hydrocarbons     Ni/HIM-5     bi-functional catalyst    

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Thoughts on Scientific Issues in Engineering Material Research

yuqiao

Strategic Study of CAE 1999, Volume 1, Issue 3,   Pages 1-4

Abstract: Although some achievements have been accumulated in material research at home and abroad, deeper investigationsare still needed on a more precise model and state equation corresponding to the damage of a specific materialand the erosion of the space articles as well as the increase of the retreat value of the protection materialbelong to the response of materials to high speed collision.Electromagnetic materials such as radome material, infrared stealth material and EM shielding material are all EM functioning materials with EM wave of

Keywords： material for radome     wave absorbing material     infrared stealth material     EMC material    

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Drivers and barriers to engage enterprises in environmental management initiatives in Suzhou Industrial Park, China

Bing ZHANG, Jun BI, Beibei LIU

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 2,   Pages 210-220 doi: 10.1007/s11783-009-0014-7

Abstract: Small- and medium-sized enterprises (SMEs) play an important role in sustainable development not only for their significant contribution to China’s economy, but also for their big share of total discharged pollutants. Therefore, this research takes the enterprises in Suzhou Industrial Park, China as the case study to investigate the environmental management practices of SMEs, and identify drivers and barriers to engaging businesses in environmental management initiatives. It is shown that, as in other countries, SMEs are less active in adopting environmental management initiatives than larger companies. Legislation remains the key driver to engage SMEs in environmental management initiatives. Based on the analysis, policy recommendations are also presented.

Keywords： small- and medium-sized enterprises (SMEs)     environmental management initiative     Suzhou industrial park    

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Biological conversion pathways of sulfate reduction ammonium oxidation in anammox consortia

Zhen Bi, Deqing Wanyan, Xiang Li, Yong Huang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 3, doi: 10.1007/s11783-019-1217-1

Abstract: The SRAO phenomena tended to occur only under certain conditions. High amount of biomass and non-anaerobic condition is requirement for SRAO. Anammox bacteria cannot oxidize ammonium with sulfate as electron acceptor. AOB and AnAOB are mainly responsible for ammonium conversion. Heterotrophic sulfate reduction mainly contributed to sulfate conversion. For over two decades, sulfate reduction with ammonium oxidation (SRAO) had been reported from laboratory experiments. SRAO was considered an autotrophic process mediated by anammox bacteria, in which ammonium as electron donor was oxidized by the electron acceptor sulfate. This process had been attributed to observed transformations of nitrogenous and sulfurous compounds in natural environments. Results obtained differed largely for the conversion mole ratios (ammonium/sulfate), and even the intermediate and final products of sulfate reduction. Thus, the hypothesis of biological conversion pathways of ammonium and sulfate in anammox consortia is implausible. In this study, continuous reactor experiments (with working volume of 3.8L) and batch tests were conducted under normal anaerobic (0.2≤DO<0.5 mg/L) / strict anaerobic (DO<0.2 mg/L) conditions with different biomass proportions to verify the SRAO phenomena and identify possible pathways behind substrate conversion. Key findings were that SRAO occurred only in cases of high amounts of inoculant biomass under normal anaerobic condition, while absent under strict anaerobic conditions for same anammox consortia. Mass balance and stoichiometry were checked based on experimental results and the thermodynamics proposed by previous studies were critically discussed. Thus anammox bacteria do not possess the ability to oxidize ammonium with sulfate as electron acceptor and the assumed SRAO could, in fact, be a combination of aerobic ammonium oxidation, anammox and heterotrophic sulfate reduction processes.

Keywords： Anammox bacteria     Autotrophic     Biological conversion     Sulfate reducing ammonium oxidation (SRAO)    

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A novel approach to minimizing material loss for computer numerical control flank-regrinding of worn

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0757-z

Abstract: However, the traditional method involves material waste by trial and error and dramatically decreasesstudy presented a new approach to planning the wheel path for regrinding worn end mills to minimize materialResults showed that the proposed approach could save 25% of cutter material compared with the traditionalThis work effectively provides a general regrinding solution for the worn flank with maximum material-saving

Keywords： flank-regrinding     worn end mill     wheel position and orientation     material loss     over-cut    

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Title Author Date Type Operation

Topology optimization of piezoelectric bi-material actuators with velocity feedback control

Mariana MORETTI, Emílio C. N. SILVA

Journal Article

Performance of a bi-layer solar steam generation system working at a high-temperature of top surface

Jinxin ZHONG, Congliang HUANG

Journal Article

Bi-modes alternation stepping ultrasonic motors

JIN Jiamei, ZHAO Chunsheng

Journal Article

Acoustic characteristics of bi-directional turbines for thermoacoustic generators

Dongdong LIU, Yanyan CHEN, Wei DAI, Ercang LUO

Journal Article

Cu-doped Bi/Bi2WO6 catalysts for efficient N2 fixation by photocatalysis

Journal Article

Modeling the impact of uncertainty in emissions trading markets with bankable permits

Yongliang ZHANG, Bing ZHANG, Jun BI, Pan HE

Journal Article

Liquid metal material genome: Initiation of a new research track towards discovery of advanced energy

Lei WANG, Jing LIU

Journal Article

Hybrid genetic algorithm for bi-objective resource-constrained project scheduling

Fikri KUCUKSAYACIGIL, Gündüz ULUSOY

Journal Article

Robust topology optimization of multi-material lattice structures under material and load uncertainties

Yu-Chin CHAN, Kohei SHINTANI, Wei CHEN

Journal Article

Visible-light-driven heterostructured g-CN/Bi-TiO floating photocatalyst with enhanced charge carrier

Journal Article

Conversion of phenol to cyclohexane in the aqueous phase over Ni/zeolite bi-functional catalysts

Jimei Zhang, Fuping Tian, Junwen Chen, Yanchun Shi, Hongbin Cao, Pengge Ning, Shanshan Sun, Yongbing Xie

Journal Article

Thoughts on Scientific Issues in Engineering Material Research

yuqiao

Journal Article

Drivers and barriers to engage enterprises in environmental management initiatives in Suzhou Industrial Park, China

Bing ZHANG, Jun BI, Beibei LIU

Journal Article

Biological conversion pathways of sulfate reduction ammonium oxidation in anammox consortia

Zhen Bi, Deqing Wanyan, Xiang Li, Yong Huang

Journal Article

A novel approach to minimizing material loss for computer numerical control flank-regrinding of worn

Journal Article