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Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 7, doi: 10.1007/s11783-021-1494-3
• A Passive Aeration Ditch was developed to treat decentralized wastewater
Keywords: Decentralized wastewater Passive aeration ditch Biofilm formation C/N ratio Salinity Model simulation
Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1731-z
● A 2D finite-element solute transport model, PRB-Trans, is developed.
Keywords: Passive convergence-permeable reactive barrier Numerical modeling Hydraulic behavior assessment Pollutant
Min-Ho CHEY, Jae-Ung KIM
Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 267-280 doi: 10.1007/s11709-012-0170-x
Keywords: tuned mass damper parametric optimization passive control white noise earthquake excitation
Hamed HABIBI, Hamed RAHIMI NOHOOJI, Ian HOWARD
Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3, Pages 377-388 doi: 10.1007/s11465-017-0431-4
Power maximization has always been a practical consideration in wind turbines. The question of how to address optimal power capture, especially when the system dynamics are nonlinear and the actuators are subject to unknown faults, is significant. This paper studies the control methodology for variable-speed variable-pitch wind turbines including the effects of uncertain nonlinear dynamics, system fault uncertainties, and unknown external disturbances. The nonlinear model of the wind turbine is presented, and the problem of maximizing extracted energy is formulated by designing the optimal desired states. With the known system, a model-based nonlinear controller is designed; then, to handle uncertainties, the unknown nonlinearities of the wind turbine are estimated by utilizing radial basis function neural networks. The adaptive neural fault tolerant control is designed passively to be robust on model uncertainties, disturbances including wind speed and model noises, and completely unknown actuator faults including generator torque and pitch actuator torque. The Lyapunov direct method is employed to prove that the closed-loop system is uniformly bounded. Simulation studies are performed to verify the effectiveness of the proposed method.
Keywords: wind turbine nonlinear model maximum power tracking passive fault tolerant control adaptive neural control
Recent developments in passive interconnected vehicle suspension
Wade A. SMITH, Nong ZHANG,
Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1, Pages 1-18 doi: 10.1007/s11465-009-0092-z
Keywords: interconnected suspensions rollover prevention vehicle dynamics ride comfort multibody system dynamics hydraulic system dynamics
Moving target detection in the cepstrum domain for passive coherent location (PCL) radar
Ji-chuan LI,Xiao-de LU,Hui ZHANG,Peng-cheng YANG,Yu LIU,Mao-sheng XIANG
Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 9, Pages 785-795 doi: 10.1631/FITEE.1500036
Keywords: Moving target detection Cepstrum techniques Cross ambiguity function (CAF) Passive coherent location
A state-of-the-art review of solar passive building system for heating or cooling purpose
Arun Kumar NANDA,C K PANIGRAHI
Frontiers in Energy 2016, Volume 10, Issue 3, Pages 347-354 doi: 10.1007/s11708-016-0403-0
Keywords: HVAC heating cooling solar heating carbon dioxide (CO2) emissions
A Survey of the Observability for Single Observer Passive Location
Deng Xinpu
Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 54-62
A basic requirement for passive state estimation using single observer In this paper, the state-observability problem for passive target tracking by angle measurements
Keywords: passive location TMA observability
Zhimin QIU, Daogang LU, Jingpin FU, Li FENG, Yuhao ZHANG
Frontiers in Energy 2021, Volume 15, Issue 4, Pages 860-871 doi: 10.1007/s11708-021-0744-1
Keywords: passive residual heat removal heat exchanger (PRHR HX) C-shape tube revised heat transfer correlations
Imposing Active Sources during High-Frequency Passive Surface-Wave Measurement Article
Feng Cheng,Jianghai Xia,Chao Shen,Yue Hu,Zongbo Xu,Binbin Mi
Engineering 2018, Volume 4, Issue 5, Pages 685-693 doi: 10.1016/j.eng.2018.08.003
Keywords: Passive surface wave Active surface wave High frequency Mixed-source surface wave Spatial autocorrelation Multichannel analysis of passive surface waves
Evaluation of transmissibility for a class of nonlinear passive vibration isolators
Z. K. PENG, Z. Q. LANG, G. MENG
Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4, Pages 401-409 doi: 10.1007/s11465-012-0349-9
In this study, the concept of Output Frequency Response Functions (OFRFs) is applied to represent the transmissibility of nonlinear isolators in frequency domain. With the OFRFs estimated from numerical simulation responses, an explicit analytical relationship between the transmissibility and the nonlinear characteristic parameters is derived for a wide class of nonlinear isolators that have nonlinear anti-symmetric damping characteristics and a comprehensive pattern about how the nonlinear damping characteristic parameters might affect the force and displacement transmissibility is built for the vibration isolators. The results reveal that it is reasonable to analyze the force and displacement transmissibility of the nonlinear isolators by simply investigating the fundamental harmonic components of the force and displacement outputs of the nonlinear isolators, and the introduction of a nonlinear anti-symmetric damping into vibration isolators can significantly suppress both the force and displacement transmissibility over the resonant frequency region, but has almost no effect on the transmissibility at non-resonant regions. These conclusions are of significant importance in the analysis and design of the nonlinear vibration isolators with nonlinear anti-symmetric damping.
Keywords: nonlinear vibration volterra series Output Frequency Response Functions (OFRFs) nonlinear damping vibration isolator
Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1591-y
● A novel PRB configuration based on passive convergent flow effect
Keywords: Passive convergence-permeable reactive barrier (PC-PRB) Permeable reactive barrier configuration Numerical
Coulomb-type solutions for passive earth pressure with steady seepage
WANG Junjie, CHAI Hejun, LIN Xin, XU Jiamei
Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 1, Pages 56-66 doi: 10.1007/s11709-008-0001-2
Keywords: function coefficient Coulomb-type effective friction different drainage
Design and experimental study of a passive power-source-free stiffness-self-adjustable mechanism
Yuwang LIU, Dongqi WANG, Shangkui YANG, Jinguo LIU, Guangbo HAO
Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1, Pages 32-45 doi: 10.1007/s11465-020-0604-4
Keywords: variable stiffness mechanism stiffness self-regulation bionic robot modeling
Jue WANG, Jun WANG
Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 4, Pages 557-568 doi: 10.1631/FITEE.1601423
Keywords: Multistatic passive radar Compressed sensing Phase adjustment Fixed-point iteration technique
Title Author Date Type Operation
Mechanistic insight into the biofilm formation and process performance of a passive aeration ditch (PAD
Journal Article
Numerical modeling and performance evaluation of passive convergence-permeable reactive barrier (PC-PRB
Journal Article
Parametric control of structural responses using an optimal passive tuned mass damper under stationary
Min-Ho CHEY, Jae-Ung KIM
Journal Article
Power maximization of variable-speed variable-pitch wind turbines using passive adaptive neural fault
Hamed HABIBI, Hamed RAHIMI NOHOOJI, Ian HOWARD
Journal Article
Recent developments in passive interconnected vehicle suspension
Wade A. SMITH, Nong ZHANG,
Journal Article
Moving target detection in the cepstrum domain for passive coherent location (PCL) radar
Ji-chuan LI,Xiao-de LU,Hui ZHANG,Peng-cheng YANG,Yu LIU,Mao-sheng XIANG
Journal Article
A state-of-the-art review of solar passive building system for heating or cooling purpose
Arun Kumar NANDA,C K PANIGRAHI
Journal Article
study of primary and secondary side coupling natural convection heat transfer characteristics of the passive
Zhimin QIU, Daogang LU, Jingpin FU, Li FENG, Yuhao ZHANG
Journal Article
Imposing Active Sources during High-Frequency Passive Surface-Wave Measurement
Feng Cheng,Jianghai Xia,Chao Shen,Yue Hu,Zongbo Xu,Binbin Mi
Journal Article
Evaluation of transmissibility for a class of nonlinear passive vibration isolators
Z. K. PENG, Z. Q. LANG, G. MENG
Journal Article
Passive convergence-permeable reactive barrier (PC-PRB): An effective configuration to enhance hydraulic
Journal Article
Coulomb-type solutions for passive earth pressure with steady seepage
WANG Junjie, CHAI Hejun, LIN Xin, XU Jiamei
Journal Article
Design and experimental study of a passive power-source-free stiffness-self-adjustable mechanism
Yuwang LIU, Dongqi WANG, Shangkui YANG, Jinguo LIU, Guangbo HAO
Journal Article