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Effect of adjusted mesoscale drag model on flue gas desulfurization in powder-particle spouted beds

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 909-920 doi: 10.1007/s11705-021-2100-8

Abstract: An energy minimum multiscale model was adjusted to simulate the mesoscale structure of the flue gas desulfurizationThe obtained results revealed that the spout morphology simulated by the adjusted mesoscale drag modelIn addition, more thorough gas radial mixing was achieved using the adjusted mesoscale drag model.was 1.5 times higher than that obtained by the homogeneous drag model during the simulation of watermesoscale drag models were 47.63% and 75.08%, respectively, indicating much higher accuracy of the latter

Keywords： adjusted mesoscale drag model     particle image velocimetry     water vaporization     desulfurization reaction    

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Development of an analytical model to estimate the churning losses in high-speed axial piston pumps

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-021-0671-1

Abstract: of high-speed axial piston pumps, but accurate analytical models are not available to estimate the dragIn this paper, we derive the analytical expressions of the drag torque acting on the key rotating partsThe calculated drag torque agrees well with the experimental data over a wide range of rotational speedsThe presented analytical model provides practical guidelines for reducing the churning losses in high-speed

Keywords： axial piston pump     rotating parts     high rotational speed     churning losses     drag torque    

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Mesoscale fabrication of a complex surface for integral impeller blades

Xibin WANG,Tianfeng ZHOU,Lijing XIE,Li JIAO,Zhibing LIU,Zhiqiang LIANG,Pei YAN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 116-131 doi: 10.1007/s11465-017-0426-1

Abstract: However, the machining of a mesoscale impeller with a complex integral surface is difficult because ofA mesoscale component is usually manufactured by milling.with the non-instantaneous-pole envelope principle and manufactured by grinding based on the profile modelof the helical groove and the mathematical model of the cutting edge curve.The fractal theory-based characterization shows that the completed mesoscale integral impeller exhibits

Keywords： mesoscale fabrication     micro-milling tool     mesoscale milling     impeller blade    

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Photoreduction adjusted surface oxygen vacancy of BiMoO for boosting photocatalytic redox performance

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1937-1948 doi: 10.1007/s11705-023-2353-5

Abstract: In this study, Bi2MoO6 with adjustable rich oxygen vacancies was prepared by a novel and simple solvothermal-photoreduction method which might be suitable for a large-scale production. The experiment results show that Bi2MoO6 with rich oxygen vacancies is an excellent photocatalyst. The photocatalytic ability of BMO-10 is 0.3 and 3.5 times higher than that of the pristine Bi2MoO6 for Rhodamine B degradation and Cr(VI) reduction, respectively. The results display that the band energy of the samples with oxygen vacancies was narrowed and the light absorption was broadened. Meanwhile, the efficiency of photogenerated electron-holes was increased and the separation and transfer speed of photogenerated carriers were improved. Therefore, this work provides a convenient and efficient method to prepare potential adjustable oxygen vacancy based photocatalysts to eliminate the pollution of dyes and Cr(VI) in water.

Keywords： Bi2MoO6     oxygen vacancies     photoreduction     Cr(VI)     RhB    

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Development of a hydrodynamic model and the corresponding virtual software for dual-loop circulating

Shanwei Hu, Xinhua Liu

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 579-590 doi: 10.1007/s11705-020-1953-6

Abstract: A full-loop modeling scheme was implemented by using the EMMS model and/or its extension models to compute

Keywords： circulating fluidized bed     mathematical modeling     energy minimization multiscale     virtual fluidization     mesoscale    

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Lateral Vibration Analyses of Flying Vehicle under Thrust and Drag

Song Jian

Strategic Study of CAE 2000, Volume 2, Issue 10,   Pages 63-72

Abstract:

In this paper, the influence of thrust and air drag on rocket lateral vibration is studied, and thefrequency reduction under the thrust and drag is analyzed.accelerating and passive decelerating parts of trajectory as well as the cruise flight when thrust and drag

Keywords： aircraft     rocket     lateral vibration     thrust and drag     vibration mode and frequency    

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Nonlinear programming control using differential aerodynamic drag for CubeSat formation flying Article

Sheng-chao DENG, Tao MENG, Zhong-he JIN

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 7,   Pages 867-881 doi: 10.1631/FITEE.1500493

Abstract: Atmospheric drag is one of the space environmental forces that low-orbit satellites can use to realizepresents an integrated control strategy to achieve the desired in-track formation through the atmospheric dragAtmospheric drag cannot be ignored and has a major impact on both attitude and orbit of the satellite

Keywords： QB50     ZJUCubeSat     Atmospheric drag     Formation flying    

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Phase- and epidemic region-adjusted estimation of the number of coronavirus disease 2019 cases in China

Ruijie Chang, Huwen Wang, Shuxian Zhang, Zezhou Wang, Yinqiao Dong, Lhakpa Tsamlag, Xiaoyue Yu, Chen Xu, Yuelin Yu, Rusi Long, Ning-Ning Liu, Qiao Chu, Ying Wang, Gang Xu, Tian Shen, Suping Wang, Xiaobei Deng, Jinyan Huang, Xinxin Zhang, Hui Wang, Yong Cai

Frontiers of Medicine 2020, Volume 14, Issue 2,   Pages 199-209 doi: 10.1007/s11684-020-0768-7

Abstract: A phase- and region-adjusted SEIR model was applied for modeling and predicting the number of cases in

Keywords： SEIR model     COVID-19     estimate     China    

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Mesoscopic Modeling Approach and Application for Steel Fiber Reinforced Concrete under Dynamic Loading: A Review Review

张锦华, 吴彰钰, 余红发, 麻海燕, 达波

Engineering 2022, Volume 16, Issue 9,   Pages 220-238 doi: 10.1016/j.eng.2022.01.011

Abstract: under dynamic loads, the mesoscopic modeling approach that assumes SFRC to be composed of different mesoscaleGeneration approaches for the SFRC mesoscale model in the simulation works, including steel fiber, coarseSFRC under dynamic loads (i.e., compression, tension, and contact blast) simulated using the general mesoscaleFinally, some critical analysis on the current shortcomings of the mesoscale modeling of SFRC is

Keywords： Steel fiber reinforced concrete     Mesoscale modeling     Dynamic loading     Materials model     Interfacial characteristic    

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Design innovation of mesoscale robotic swarms: applications to cooperative urban sensing and mapping Special Feature on Intelligent Design

Audelia G. DHARMAWAN, Gim Song SOH, Shaohui FOONG, Roland BOUFFANAIS, Kristin L. WOOD

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 12, doi: 10.1631/FITEE.1900384

Abstract: Development of mesoscale robots is gaining interest in security and surveillance domains due to theirsystem architecture and functional layout; (3) the developed and implemented design principles for mesoscalerobotic systems; (4) the various key algorithms developed for effective collective operations of mesoscaleThis study includes our perception of the embedded hardware requirements for reliable operations of mesoscale

Keywords： System-of-systems design     Mesoscale robot     Swarm     Urban sensing    

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and Landscape of the Knowledge System: Multilevel Structures, Each Multiscaled with Complexity at the Mesoscale

Jinghai Li

Engineering 2016, Volume 2, Issue 3,   Pages 276-285 doi: 10.1016/J.ENG.2016.03.001

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Effect of catalyst layer mesoscopic pore-morphology on cold start process of PEM fuel cells

Ahmed Mohmed DAFALLA, Fangming JIANG

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 460-472 doi: 10.1007/s11708-021-0733-4

Abstract: The CCL mesoscale morphology is characterized by two tortuosity factors of the ionomer network and poreThe simulation results demonstrate that the mesoscale morphology of CCL has a significant influence onIt was found that cold-starting of a cell with a CCL of less tortuous mesoscale morphology can succeed, whereas starting up a cell with a CCL of more tortuous mesoscale morphology may fail.

Keywords： cold start     energy conversion     fuel cells     mesoscale morphology     tortuosity     water management    

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Technologies for Pipelining High-Pour-Point and Viscous Crudes and Their Development

Zhang Jinjun

Strategic Study of CAE 2002, Volume 4, Issue 6,   Pages 71-76

Abstract: The up-to-date research and application of technologies for pour point depression and drag reduction

Keywords： pipelining     paraffin-base crude     heavy crude     pour point depression     drag reduction     chemical additives    

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Complexity at Mesoscales: A Common Challenge in Developing Artificial Intelligence Perspective

Li Guo, Jun Wu, Jinghai Li

Engineering 2019, Volume 5, Issue 5,   Pages 924-929 doi: 10.1016/j.eng.2019.08.005

Abstract:

Exploring the physical mechanisms of complex systems and making effective use of them are the keys to dealing with the complexity of the world. The emergence of big data and the enhancement of computing power, in conjunction with the improvement of optimization algorithms, are leading to the development of artificial intelligence (AI) driven by deep learning. However, deep learning fails to reveal the underlying logic and physical connotations of the problems being solved. Mesoscience provides a concept to understand the mechanism of the spatiotemporal multiscale structure of complex systems, and its capability for analyzing complex problems has been validated in different fields. This paper proposes a research paradigm for AI, which introduces the analytical principles of mesoscience into the design of deep learning models. This is done to address the fundamental problem of deep learning models detaching the physical prototype from the problem being solved; the purpose is to promote the sustainable development of AI.

Keywords： Artificial intelligence     Deep learning     Mesoscience     Mesoscale     Complex system    

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Standard model of knowledge representation

Wensheng YIN

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3,   Pages 275-288 doi: 10.1007/s11465-016-0372-3

Abstract: methods include predicate logic, semantic network, computer programming language, database, mathematical modelintrinsic link between various knowledge representation methods, a unified knowledge representation modelAccording to ontology, system theory, and control theory, a standard model of knowledge representationThe model is composed of input, processing, and output.In addition, the standard model of knowledge representation provides a way to solve problems of non-precision

Keywords： knowledge representation     standard model     ontology     system theory     control theory     multidimensional representation    

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Title Author Date Type Operation

Effect of adjusted mesoscale drag model on flue gas desulfurization in powder-particle spouted beds

Journal Article

Development of an analytical model to estimate the churning losses in high-speed axial piston pumps

Journal Article

Mesoscale fabrication of a complex surface for integral impeller blades

Xibin WANG,Tianfeng ZHOU,Lijing XIE,Li JIAO,Zhibing LIU,Zhiqiang LIANG,Pei YAN

Journal Article

Photoreduction adjusted surface oxygen vacancy of BiMoO for boosting photocatalytic redox performance

Journal Article

Development of a hydrodynamic model and the corresponding virtual software for dual-loop circulating

Shanwei Hu, Xinhua Liu

Journal Article

Lateral Vibration Analyses of Flying Vehicle under Thrust and Drag

Song Jian

Journal Article

Nonlinear programming control using differential aerodynamic drag for CubeSat formation flying

Sheng-chao DENG, Tao MENG, Zhong-he JIN

Journal Article

Phase- and epidemic region-adjusted estimation of the number of coronavirus disease 2019 cases in China

Ruijie Chang, Huwen Wang, Shuxian Zhang, Zezhou Wang, Yinqiao Dong, Lhakpa Tsamlag, Xiaoyue Yu, Chen Xu, Yuelin Yu, Rusi Long, Ning-Ning Liu, Qiao Chu, Ying Wang, Gang Xu, Tian Shen, Suping Wang, Xiaobei Deng, Jinyan Huang, Xinxin Zhang, Hui Wang, Yong Cai

Journal Article

Mesoscopic Modeling Approach and Application for Steel Fiber Reinforced Concrete under Dynamic Loading: A Review

张锦华, 吴彰钰, 余红发, 麻海燕, 达波

Journal Article

Design innovation of mesoscale robotic swarms: applications to cooperative urban sensing and mapping

Audelia G. DHARMAWAN, Gim Song SOH, Shaohui FOONG, Roland BOUFFANAIS, Kristin L. WOOD

Journal Article

and Landscape of the Knowledge System: Multilevel Structures, Each Multiscaled with Complexity at the Mesoscale

Jinghai Li

Journal Article

Effect of catalyst layer mesoscopic pore-morphology on cold start process of PEM fuel cells

Ahmed Mohmed DAFALLA, Fangming JIANG

Journal Article

Technologies for Pipelining High-Pour-Point and Viscous Crudes and Their Development

Zhang Jinjun

Journal Article

Complexity at Mesoscales: A Common Challenge in Developing Artificial Intelligence

Li Guo, Jun Wu, Jinghai Li

Journal Article

Standard model of knowledge representation

Wensheng YIN

Journal Article