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Improving retrieval precision of NO

Jinpeng YANG

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 92-96 doi: 10.1007/s11465-009-0001-5

Abstract: The NO density error retrieved by the traditional method of differential optical absorption spectroscopy (DOAS) was analyzed. The technique for reducing the error is proposed and used to obtain the NO density of Chengdu through DOAS.

Keywords： absorption structure     low-frequency structure     absorption cross-section     NO2 density    

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Improvement to observability measures of LFO modes in power systems with DFIGs

Shenghu LI

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 539-549 doi: 10.1007/s11708-019-0617-z

Abstract: Observation of the low-frequency oscillation (LFO) modes in power systems is important to design the

Keywords： wind power system     low-frequency oscillation (LFO)     observability measure     sensitivity     doubly-fed induction    

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Super Resolution Perception for Improving Data Completeness in Smart Grid State Estimation Article

Gaoqi Liang, Guolong Liu, Junhua Zhao, Yanli Liu, Jinjin Gu, Guangzhong Sun, Zhaoyang Dong

Engineering 2020, Volume 6, Issue 7,   Pages 789-800 doi: 10.1016/j.eng.2020.06.006

Abstract: serves as a basic tool for understanding the true states of a smart grid, should be performed with high frequencyMore complete system state data are needed to support high-frequency state estimation.The problem of improving data completeness by recovering high-frequency data from low-frequency datastudies have demonstrated the effectiveness and value of the proposed SRPNSE approach in recovering high-frequencydata from low-frequency data for the state estimation.

Keywords： State estimation     Low-frequency data     High-frequency data     Super resolution perception     Data completeness    

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A data-driven method for estimating the target position of low-frequency sound sources in shallow seas Research Articles

Xianbin Sun, Xinming Jia, Yi Zheng, Zhen Wang,robin_sun@qut.edu.cn,jiaxinming_123@163.com

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 7,   Pages 1020-1030 doi: 10.1631/FITEE.2000181

Abstract: Estimating the target position of low-frequency sound sources in a environment is difficult due to theenvironment and terrain conditions, and allows for real-time positioning of the sound source under low-parameterExperimental results show that the average error of the model is 56 m for estimating the target position of a low-frequency

Keywords： 矢量水听器；浅海；低频；位置估计；循环神经网络    

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Frequency domain a9ctive vibration control of a flexible plate based on neural networks

Jinxin LIU, Xuefeng CHEN, Zhengjia HE

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 109-117 doi: 10.1007/s11465-013-0252-z

Abstract:

A neural-network (NN)-based active control system was proposed to reduce the low frequency noise radiationMulti-frequency control in frequency domain was achieved by simulation through the NN-based control systems

Keywords： active vibration control (AVC)     neural network (NN)     low frequency noise     frequency domain control     multi-frequency    

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Comparative study of oscillating flow characteristics of cryocooler regenerator at low temperatures

Yonglin JU , Qingqing SHEN ,

Frontiers in Energy 2009, Volume 3, Issue 1,   Pages 80-84 doi: 10.1007/s11708-009-0008-y

Abstract: A brief review is presented on previous experimental results and correlations on the friction factor of cryocooler regenerators operating at oscillating flow and pulsating pressure conditions, for different mesh sizes of packed woven screens, focusing on the effects of different operating frequencies ranging from 20 to 80 Hz, at room and cryogenic temperatures. A comparison of the friction factor data with those of other studies is presented to clarify the reason for the difference. Finally, a new oscillating flow correlation of regenerators, in terms of several non-dimensional parameters, is discussed and compared.

Keywords： friction factor     regenerator     oscillating flow     high frequency    

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Correlation between carbon emissions and energy structure –Reliability analysis of low carbon target

Ben HUA

Frontiers in Energy 2011, Volume 5, Issue 2,   Pages 214-220 doi: 10.1007/s11708-010-0133-7

Abstract: peak value of energy consumption will lag behind the peak value of carbon emissions; the world energy structure

Keywords： correlation     carbon emissions     energy consumption     high carbon emissions energy mix     target of emission reduction     reliability    

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Shaking table testing of hard layered soil-pile-structure interaction system

LI Peizhen, REN Hongmei, LU Xilin, SONG Heping, CHEN Yueqing

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 346-352 doi: 10.1007/s11709-007-0046-7

Abstract: Shaking table tests on a dynamic interaction system of hard layered soil, pile foundation and frame structureBased on these tests, several key issues about the seismic response of the dynamic soil-structure interactionThe natural frequency of the system was less than that of the structure on rigid foundation if the SSIis not taken into account, while its damping ratio was larger than that of the structure.The mode shape of the system was different from that of the structure on the fixed base in that there

Keywords： super-structure     Generally     Magnification     frequency     different    

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Research on acoustic-structure sensitivity using FEM and BEM

ZHANG Jun, ZHAO Wenzhong, ZHANG Weiying

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 62-67 doi: 10.1007/s11465-007-0010-1

Abstract: Acoustic-structure sensitivity is used to predict the change of acoustic pressure when a structure designThe sensitivity is significant for reducing noise of structure.Using FEM (finite element method) and BEM (boundary element method) acoustic-structure sensitivity wasAcoustic pressure sensitivity with respect to structure thickness achieved in frequency ranges 1 100Hz, and its change rule along with stimulating frequency and design variable were analyzed.

Keywords： sensitivity method     BEM     acoustic pressure     pressure sensitivity     frequency    

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Analysis and design of pulse frequency modulation dielectric barrier discharge for low power applications

Tang-tang GUO,Xing-liang LIU,Shi-qiang HAO,Chi ZHANG,Xiang-ning HE

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 3,   Pages 249-258 doi: 10.1631/FITEE.1400185

Abstract: For low power dielectric barrier discharge (DBD) used in small-size material treatment or portable devicesIn this paper, steady-state analysis of the low power DBD is presented, considering the inevitable parasiticfirst harmonic approximation (RCFHA) is applied to linearize the equivalent load circuit of DBD at lowfrequency and the derived expressions are accurate and convenient for the analysis and design of therange and the applied electrode voltage, is discussed when the power is regulated with pulse frequency

Keywords： Dielectric barrier discharge     Rectifier-compensated first harmonic approximation     Parasitic capacitance     Power converter design    

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Addressing Frequency Control Challenges in Future Low-Inertia Power Systems: A Great Britain Perspective Perspective

Qiteng Hong, Md Asif Uddin Khan, Callum Henderson, Agustí Egea-Àlvarez, Dimitrios Tzelepis, Campbell Booth

Engineering 2021, Volume 7, Issue 8,   Pages 1057-1063 doi: 10.1016/j.eng.2021.06.005

Abstract: This paper presents opinions and insights on the challenges associated with frequency control in a low-inertiatechniques that act over different time scales: synchronous condensers, inertia emulation, and fast frequencyrecent research and development projects in GB, along with the opinions on their roles in addressing the frequencycontrol challenges in future low-inertia systems.

Keywords： Fast frequency control     Inertia emulation     Synchronous compensation     Low-inertia systems    

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Multi-harmonic forced vibration and resonance of simple beams to moving vehicles

Frontiers of Structural and Civil Engineering   Pages 981-993 doi: 10.1007/s11709-023-0979-5

Abstract: damped mono-frequency complementary harmonic.revealed that a moving load induces high-harmonic forced resonance amplification when the moving speed is lowresonance may be significant for the investigated beams subjected to vehicle loads moving at specific low, but does not induce notable variation of the modal oscillation harmonic structure for the cases thatvehicle of small mass moves in low speed.

Keywords： forced vibration     linear Euler beam     moving load     harmonic structure     frequency modulation     end restraints    

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The Extremely Low Frequency Engineering Project for Underground Exploration

Jianxun Lu,Xianjun Zhuo,Yong Liu,Guoze Zhao,Qingyun Di,

Engineering 2022, Volume 10, Issue 3,   Pages 13-20 doi: 10.1016/j.eng.2021.12.003

Keywords： EngineeringAchievements    

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Enhanced methane recovery and exoelectrogen-methanogen evolution from low-strength wastewater in an up-flow

Zechong Guo, Lei Gao, Ling Wang, Wenzong Liu, Aijie Wang

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 4, doi: 10.1007/s11783-018-1074-3

Abstract:

Methane yield increased 22 times from low-strength wastewater by

Conductive fillers altered methanogens structure

Keywords： Low-strength wastewater     Methane production     Conductive filler     Microbial community structure    

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The extremely low frequency engineering project using WEM for underground exploration

Zhuo Xianjun,Lu Jianxun,Zhao Guoze,Di Qingyun

Strategic Study of CAE 2011, Volume 13, Issue 9,   Pages 42-50

Abstract:

The ELF (extremely low frequency) engineering project for underground

Keywords： wireless electro-magnetic method（WEM）     resource exploration     earthquake predication    

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Title Author Date Type Operation

Improving retrieval precision of NO

Jinpeng YANG

Journal Article

Improvement to observability measures of LFO modes in power systems with DFIGs

Shenghu LI

Journal Article

Super Resolution Perception for Improving Data Completeness in Smart Grid State Estimation

Gaoqi Liang, Guolong Liu, Junhua Zhao, Yanli Liu, Jinjin Gu, Guangzhong Sun, Zhaoyang Dong

Journal Article

A data-driven method for estimating the target position of low-frequency sound sources in shallow seas

Xianbin Sun, Xinming Jia, Yi Zheng, Zhen Wang,robin_sun@qut.edu.cn,jiaxinming_123@163.com

Journal Article

Frequency domain a9ctive vibration control of a flexible plate based on neural networks

Jinxin LIU, Xuefeng CHEN, Zhengjia HE

Journal Article

Comparative study of oscillating flow characteristics of cryocooler regenerator at low temperatures

Yonglin JU , Qingqing SHEN ,

Journal Article

Correlation between carbon emissions and energy structure –Reliability analysis of low carbon target

Ben HUA

Journal Article

Shaking table testing of hard layered soil-pile-structure interaction system

LI Peizhen, REN Hongmei, LU Xilin, SONG Heping, CHEN Yueqing

Journal Article

Research on acoustic-structure sensitivity using FEM and BEM

ZHANG Jun, ZHAO Wenzhong, ZHANG Weiying

Journal Article

Analysis and design of pulse frequency modulation dielectric barrier discharge for low power applications

Tang-tang GUO,Xing-liang LIU,Shi-qiang HAO,Chi ZHANG,Xiang-ning HE

Journal Article

Addressing Frequency Control Challenges in Future Low-Inertia Power Systems: A Great Britain Perspective

Qiteng Hong, Md Asif Uddin Khan, Callum Henderson, Agustí Egea-Àlvarez, Dimitrios Tzelepis, Campbell Booth

Journal Article

Multi-harmonic forced vibration and resonance of simple beams to moving vehicles

Journal Article

The Extremely Low Frequency Engineering Project for Underground Exploration

Jianxun Lu,Xianjun Zhuo,Yong Liu,Guoze Zhao,Qingyun Di,

Journal Article

Enhanced methane recovery and exoelectrogen-methanogen evolution from low-strength wastewater in an up-flow

Zechong Guo, Lei Gao, Ling Wang, Wenzong Liu, Aijie Wang

Journal Article

The extremely low frequency engineering project using WEM for underground exploration

Zhuo Xianjun,Lu Jianxun,Zhao Guoze,Di Qingyun

Journal Article