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Multi-time scale dynamics in power electronics-dominated power systems

Xiaoming YUAN, Jiabing HU, Shijie CHENG

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 303-311 doi: 10.1007/s11465-017-0428-z

Abstract: This transformation has altered the fundamental mechanism of power system dynamics, which demands the

Keywords： power electronics     power systems     multi-time scale dynamics     mass-spring-damping model     self-stabilizingand en-stabilizing property     multi-time scale power system stabilizer    

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Decreasing complexity of glucose time series derived from continuous glucose monitoring is correlated

Frontiers of Medicine 2023, Volume 17, Issue 1,   Pages 68-74 doi: 10.1007/s11684-022-0955-9

Abstract: Most information used to evaluate diabetic statuses is collected at a special time-point, such as takingstatuses, the newly developed technique “continuous glucose monitoring” (CGM) can characterize glucose dynamicsBy calculating the complexity of glucose time series index (CGI) with refined composite multi-scale entropyanalysis of the CGM data, the study showed for the first time that the complexity of glucose time series

Keywords： complexity of glucose time series     continuous glucose monitoring     impaired glucose regulation     insulinsecretion and sensitivity     refined composite multi-scale entropy    

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Effects of hydraulic retention time on nitrification activities and population dynamics of a conventional

Hongyan LI, Yu ZHANG, Min YANG, Yoichi KAMAGATA

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1,   Pages 43-48 doi: 10.1007/s11783-012-0397-8

Abstract: The effects of hydraulic retention time (HRT) on the nitrification activities and population dynamics

Keywords： ammonia-oxidizing bacteria     hydraulic retention time     nitrification activity     nitrite-oxidizing bacteria     population dynamics    

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Numerical study of droplet dynamics impinging onto steel plate covered with scale layer

Jan BOHá?EK, Ale? HORáK

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 389-398 doi: 10.1007/s11465-010-0108-8

Abstract: The steel hot rolling process is inseparably connected to an oxide layer called “scale” at high temperaturesThis paper describes the dynamics of high-speed impact between the compressible water droplet and thesteel scale layer.Considering a high droplet impact speed (100–300 ms ), inferential extremely short time interval (0.1Droplet dynamics was simulated with the help of LS-Dyna solver, whereas the stress analysis was performed

Keywords： hydraulic descaling     scale     rolling     water-hammer     descaling theory    

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On the added value of multi-scale modeling of concrete

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 1,   Pages 1-23 doi: 10.1007/s11709-021-0790-0

Abstract: This review of the added value of multi-scale modeling of concrete is based on three representative examplesThe structural nature of the high-dynamic strength increase can be explained by using a multi-scale modelThe second example refers to multi-scale thermoelastic analysis of concrete pavements, subjected to solarThe third example deals with multi-scale structural analysis of a real-scale test of a segmental tunnelOverall, it is concluded that multi-scale models have indeed a significant added value.

Keywords： experiments     multi-scale analysis     conventional structural analysis     concrete     reinforced concrete    

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Time-varying formation tracking for uncertain second-order nonlinearmulti-agent systems

Mao-peng RAN, Li-hua XIE, Jun-cheng LI

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 1,   Pages 76-87 doi: 10.1631/FITEE.1800557

Abstract:

Our study is concerned with the time-varying formation tracking problem for second-order multi-agentsystems that are subject to unknown nonlinear dynamics and external disturbance, and the states of thefollowers form a predefined time-varying formation while tracking the state of the leader.The total uncertainty lumps the unknown nonlinear dynamics and the external disturbance, and is regardedThen we propose a novel ESO based time-varying formation tracking protocol.

Keywords： Multi-agent system     Time-varying formation     Formation tracking     Nonlinear dynamics     Extended state observer    

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Community dynamics of ammonia oxidizing bacteria in a full-scale wastewater treatment system with nitrification

Xiaohui WANG, Xianghua WEN, Hengjing YAN, Kun DING, Man HU

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 1,   Pages 92-98 doi: 10.1007/s11783-010-0254-6

Abstract: nitrification was correlated to a stable community structure of ammonia oxidizing bacteria (AOB) in a full-scalewastewater treatment plant, the AOB community dynamics in a wastewater treatment system was monitoredThe community dynamics were investigated using specific PCR followed by terminal restriction fragmentindicated that during the period of nitrification stability, the AOB community structure in the full-scaleindicated that throughout the study period, the AOB community structure was relatively stable in the full-scale

Keywords： ammonia-oxidizing bacteria (AOB)     community dynamics     terminal restriction fragment length polymorphism    

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Real time monitoring for analysis of dam stability: Potential of nonlinear elasticity and nonlinear dynamics

T. CHELIDZE, T. MATCHARASHVILI, V. ABASHIDZE, M. KALABEGISHVILI, N. ZHUKOVA

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 188-205 doi: 10.1007/s11709-013-0199-5

Abstract: It is possible to derive characteristics of the whole unknown dynamics of a structure using few datahigh quality continuous records of some geotechnical characteristic(s) of a dam and modern methods of timeThe proposed real-time telemetric monitoring (DAMWATCH) complex and linear/nonlinear dynamical analysis

Keywords： real time monitoring     telemetry     dam tilts     diagnostic tools     hysteresis     nonlinear dynamics    

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Nonlinear dynamics of a wind turbine tower

A. GESUALDO, A. IANNUZZO, F. PENTA, M. MONACO

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 342-350 doi: 10.1007/s11465-019-0524-3

Abstract: Nonlinear dynamics is the most reliable among such methods.

Keywords： nonlinear dynamics     plastic shear failure     modal approximation     time history    

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AMMONIA DISPERSION FROM MULTI-FLOOR VERSUS STANDARD SINGLE-FLOOR PIG PRODUCTION FACILITIES BASED ON COMPUTATIONALFLUID DYNAMICS SIMULATIONS

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 3,   Pages 374-389 doi: 10.15302/J-FASE-2023501

Abstract:

● NH3 dispersion from a multi-floor pig building was compared

Keywords： pig building     computational fluid dynamics     ammonia     dispersion    

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Environmental dispersivity in free-water-surface-effect dominated wetland: multi-scale analysis

Zi WU, Zhi LI, Li ZENG, Ling SHAO, Hansong TANG, Qing YANG, Guoqian CHEN

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 4,   Pages 597-603 doi: 10.1007/s11783-011-0311-9

Abstract: the most-typical pattern of wetland as dominated by free-water-surface-effect is characterized by a multi-scaleevolution of the mean concentration is deduced as an extension of Taylor's classical formulation by Mei’s multi-scale

Keywords： free-surface wetland     environmental dispersion     multi-scale analysis    

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Numerical simulation of micro scale flowing and boiling

Wen WANG, Rui ZHUAN,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 396-401 doi: 10.1007/s11708-009-0049-2

Abstract: simulations of flowing and boiling in micro channels are presented, including the modeling of bubble dynamics

Keywords： volume-of-fluid (VOF)     micro channel     nucleate boiling     bubble dynamics     simulation    

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Application of coupled multi-body dynamics–discrete element method for optimization of particle damper

Danhui DAN, Qianqing WANG, Jiongxin GONG

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 244-252 doi: 10.1007/s11709-021-0696-x

Abstract: In this paper, a coupled multi-body dynamics–discrete element method is proposed to simulate the dampingThe analyses are done by combining the discrete element method in EDEM and multi-body dynamics in ADAMS

Keywords： granular material     vibration control     discrete element method     particle damper     cable vibration    

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Investigation of flow dynamics and decrease of vortex noise inside volute of centrifugal fans

LI Chunxi, WANG Songling

Frontiers in Energy 2008, Volume 2, Issue 2,   Pages 235-240 doi: 10.1007/s11708-008-0040-3

Abstract: The characteristics of three-dimension flow dynamics inside the volute of a G4-73No.8D centrifugal fanwas simulated numerically using a computational fluid dynamics(CFD) technique.Numerical results showed that large-scale vortices were broken effectively and the flow fields insidecone-cylinder-shaped anti-vortex ring was more effective than the cylinder-shaped one in breaking large-scale

Keywords： cylinder-shaped     evolution     computational     effective     large-scale    

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Multi-scale evaluation of river health in Liao River Basin, China

Fei XU, Yanwei ZHAO, Zhifeng YANG, Yuan ZHANG

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 227-235 doi: 10.1007/s11783-010-0219-9

Abstract: Previous studies on river health evaluation mainly focused on characterizations at a river-corridor scaleof the interactions among rivers, associated river basin and habitats, an assessment framework with multi-scaleSet pair analysis was applied to integrate the multi-scale indicators and determine the health classes

Keywords： multi-scale characterization     river health evaluation     Liao River Basin     set pair analysis    

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Title Author Date Type Operation

Multi-time scale dynamics in power electronics-dominated power systems

Xiaoming YUAN, Jiabing HU, Shijie CHENG

Journal Article

Decreasing complexity of glucose time series derived from continuous glucose monitoring is correlated

Journal Article

Effects of hydraulic retention time on nitrification activities and population dynamics of a conventional

Hongyan LI, Yu ZHANG, Min YANG, Yoichi KAMAGATA

Journal Article

Numerical study of droplet dynamics impinging onto steel plate covered with scale layer

Jan BOHá?EK, Ale? HORáK

Journal Article

On the added value of multi-scale modeling of concrete

Journal Article

Time-varying formation tracking for uncertain second-order nonlinearmulti-agent systems

Mao-peng RAN, Li-hua XIE, Jun-cheng LI

Journal Article

Community dynamics of ammonia oxidizing bacteria in a full-scale wastewater treatment system with nitrification

Xiaohui WANG, Xianghua WEN, Hengjing YAN, Kun DING, Man HU

Journal Article

Real time monitoring for analysis of dam stability: Potential of nonlinear elasticity and nonlinear dynamics

T. CHELIDZE, T. MATCHARASHVILI, V. ABASHIDZE, M. KALABEGISHVILI, N. ZHUKOVA

Journal Article

Nonlinear dynamics of a wind turbine tower

A. GESUALDO, A. IANNUZZO, F. PENTA, M. MONACO

Journal Article

AMMONIA DISPERSION FROM MULTI-FLOOR VERSUS STANDARD SINGLE-FLOOR PIG PRODUCTION FACILITIES BASED ON COMPUTATIONALFLUID DYNAMICS SIMULATIONS

Journal Article

Environmental dispersivity in free-water-surface-effect dominated wetland: multi-scale analysis

Zi WU, Zhi LI, Li ZENG, Ling SHAO, Hansong TANG, Qing YANG, Guoqian CHEN

Journal Article

Numerical simulation of micro scale flowing and boiling

Wen WANG, Rui ZHUAN,

Journal Article

Application of coupled multi-body dynamics–discrete element method for optimization of particle damper

Danhui DAN, Qianqing WANG, Jiongxin GONG

Journal Article

Investigation of flow dynamics and decrease of vortex noise inside volute of centrifugal fans

LI Chunxi, WANG Songling

Journal Article

Multi-scale evaluation of river health in Liao River Basin, China

Fei XU, Yanwei ZHAO, Zhifeng YANG, Yuan ZHANG

Journal Article