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Electromagnetic interference modeling and suppression techniques in variable-frequency drive systems

Le YANG, Shuo WANG, Jianghua FENG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 3,   Pages 329-353 doi: 10.1007/s11465-018-0466-1

Abstract:

Electromagnetic interference (EMI) causes electromechanical damage to the motors and degrades theUnlike fundamental frequency components in motor drive systems, high-frequency EMI noise, coupled withIn this article, EMI modeling techniques for different function units in a VFD system, including inductionThe EMI models for the motors are categorized based on modeling techniques and model topologies.EMI noise suppression techniques, including passive filter, Wheatstone bridge balance, active filter,

Keywords： variable-frequency drive (VFD)     electromagnetic interference (EMI)     motor drive modeling     EMI noise suppression    

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High Spatial Resolution Ozone Profiles Retrieved from the First Chinese Ultraviolet–Visible Hyperspectral Satellite Instrument Article

Fei Zhao, Cheng Liu, Qihou Hu, Congzi Xia, Chengxin Zhang, Wenjing Su

Engineering 2024, Volume 32, Issue 1,   Pages 107-116 doi: 10.1016/j.eng.2023.02.020

Abstract: The Environmental Trace Gases Monitoring Instrument (EMI) deployed on the Gaofen-5 satellite is the firstHowever, retrieving ozone profiles using backscattered radiance values measured by the EMI is challengingdue to unavailable measurement errors and a low signal-to-noise ratio.Therefore, we developed an algorithm specific to the characteristics of the EMI.By applying EMI averaging kernels to the ozonesonde profiles, the integrated stratospheric column ozone

Keywords： Ozone profiles     EMI     Soft calibration     Floor noise correction     Stratospheric ozone intrusion    

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Identification of cadmium-induced genes in maize seedlings by suppression subtractive hybridization

Quanlin DAI, Baifei HUANG, Zhongyi YANG, Jiangang YUAN, Junzhi YANG

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 4,   Pages 449-458 doi: 10.1007/s11783-010-0250-x

Abstract: In this paper, the technique of suppression subtractive hybridization (SSH) was used to isolate and identify

Keywords： cadmium (Cd)     suppression subtractive hybridization    

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Vibration suppression of speed-controlled robots with nonlinear control

Paolo BOSCARIOL,Alessandro GASPARETTO

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 2,   Pages 204-212 doi: 10.1007/s11465-016-0380-3

Abstract: The capability of achieving improved trajectory tracking and vibration suppression is shown through experimental

Keywords： industrial robot     nonlinear control     vibration damping     model-free control     motion control    

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Study on concoction and water mist fire suppression performance of new composite additives

Liu Jianghong,Jin Xiang,Liao Guangxuan

Strategic Study of CAE 2010, Volume 12, Issue 9,   Pages 58-62

Abstract:

Water mists for fire suppression and control have widely received considerableA new composite additive was concocted and its effectiveness to water mist's fire suppression performanceResults showed that this additive can greatly improve the fire suppression efficiency of water mist andThe fire suppression mechanism of water mist with this additive was combined with physical and chemicalHowever, the surface cooling and fuel isolation were considered to be the crucial suppression mechanism

Keywords： water mist     additive     concoction     fire suppression performance    

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A convolutional neural network based approach to sea clutter suppression for small boat detection

Guan-qing Li, Zhi-yong Song, Qiang Fu,liguanqing09@nudt.edu.cn,songzhiyong08@nudt.edu.cn

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 10,   Pages 1413-1534 doi: 10.1631/FITEE.1900523

Abstract: In this paper we propose a novel convolutional neural network based dual-activated clutter suppressionSecond, we obtain the suppression coefficients by mapping the CAM inversely to the sea clutter spectrum
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Design of noise-reduction seats for high-speed trains

Xiaojun DENG, Yanju ZHAO, Haijin ZHANG, Renzhong SHUAI, Leiwei ZHU

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 3,   Pages 385-389 doi: 10.1007/s11465-017-0438-x

Abstract: reduce noise.interior noise spectral characteristics.seats substantially reduced the noise in an entire train car.noise level at a standard point in the passenger car by 1.5 dB.Therefore, the noise-reduction seats are effective in noise reduction.

Keywords： high-speed train     sound-absorbing materials     perforated board     noise-reduction seats    

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Improvement of engine performance with high compression ratio based on knock suppression using Miller

Haiqiao WEI, Jie YU, Lei ZHOU

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 691-706 doi: 10.1007/s11708-019-0621-3

Abstract: In theory, high compression ratio has the potential to improve the thermal efficiency and promote the power output of the SI engine. However, the application of high compression ratio is substantially limited by the knock in practical working process. The objective of this work is to comprehensively investigate the application of high compression ratio on a gasoline engine based on the Miller cycle with boost pressure and split injection. In this work, the specific optimum strategies for CR10 and CR12 were experimentally investigated respectively on a single cylinder DISI engine. It was found that a high level of Miller cycle with a higher boost pressure could be used in CR12 to achieve an effective compression ratio similar to CR10, which could eliminate the knock limits at a high compression ratio and high load. To verify the advantages of the high compression ratio, the fuel economy and power performance of CR10 and CR12 were compared at full and partial loads. The result revealed that, compared with CR10, a similar power performance and a reduced fuel consumption of CR12 at full load could be achieved by using the strong Miller cycle and split injection. At partial load, the conditions of CR12 had very superior fuel economy and power performance compared to those of CR10.

Keywords： high compression ratio     knock     Miller cycle     split injection     engine performance    

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Anovel approach of noise statistics estimate using H∞ filter in target tracking

Xie WANG,Mei-qin LIU,Zhen FAN,Sen-lin ZHANG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 5,   Pages 449-457 doi: 10.1631/FITEE.1500262

Abstract: Noise statistics are essential for estimation performance.In practical situations, however, a priori information of noise statistics is often imperfect.Previous work on noise statistics identification in linear systems still requires initial prior knowledgeof the noise.Then by applying state estimates obtained from the H∞ filter, better estimates of the noise mean and

Keywords： Noise estimate     H∞     filter     Target tracking    

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Ambient Noise Tomography for Coral Islands Article

Shaohong Xia, Changrong Zhang, Jinghe Cao

Engineering 2023, Volume 25, Issue 6,   Pages 182-193 doi: 10.1016/j.eng.2021.09.022

Abstract: recorded by a dense array on an isolated coral island in the South China Sea, we analyzed the ambient noisecharacteristics and obtained a 3D subsurface structure of the coral island using ambient noise tomographyWe made the following findings: ① The ambient noise frequencies can be roughly categorized into threeThe spectral characteristics of the noise below 5 Hz were consistent at different stations, but therewere significant differences in the characteristics of the noise above 5 Hz. ② For ambient noise frequencies

Keywords： Coral island     Ambient noise tomography     Engineering geology     South China Sea    

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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 generation, evolution, and noise of the vortex were investigated when cylinder-shaped and cone-cylinder-shapedExperimental results indicated A-sound level and spectrum noise of the refitted fan decreased and thetwo anti-vortex rings were effective in decreasing vortex noise.more effective than the cylinder-shaped one in breaking large-scale vortexes and decreasing vortex noise

Keywords： cylinder-shaped     evolution     computational     effective     large-scale    

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Application of python-based Abaqus preprocess and postprocess technique in analysis of gearbox vibration and noise

Guilian YI, Yunkang SUI, Jiazheng DU

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 229-234 doi: 10.1007/s11465-011-0128-z

Abstract:

To reduce vibration and noise, a damping layer and constraint layer are usually pasted on the innersurface of a gearbox thin shell, and their thicknesses are the main parameters in the vibration and noiseacceleration of the point on the gearbox surface is the main index that can reflect the vibration and noisepoint, and the normal accelerations of different points can reflect the degree of the vibration and noisestructure, and the vibration acceleration level is adopted to measure the degree of the vibration and noise

Keywords： Abaqus secondary development     Python language     vibration and noise reduction     K-S function     vibration acceleration    

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Growth suppression of colorectal cancer expressing S492R EGFR by monoclonal antibody CH12

Qiongna Dong, Bizhi Shi, Min Zhou, Huiping Gao, Xiaoying Luo, Zonghai Li, Hua Jiang

Frontiers of Medicine 2019, Volume 13, Issue 1,   Pages 83-93 doi: 10.1007/s11684-019-0682-z

Abstract: Furthermore, mAb CH12 showed significantly stronger growth suppression activities and induced a more

Keywords： S492R EGFR ectodomain mutation     colorectal cancer     mAb CH12     immunnotherapy    

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Integrated virtual-design methods for forecasting radiated noise of single cylinder diesel block

GUO Lei, HAO Zhiyong, XU Hongmei, LIU Lianyun

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 416-421 doi: 10.1007/s11708-008-0097-z

Abstract: Finally, the radiated noise such as sound power level and efficiency in the out sound field were obtained

Keywords： bearing     dynamical     frequency response     dynamical simulation     hybrid dynamical    

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of structural responses using an optimal passive tuned mass damper under stationary Gaussian white noise

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

Abstract: a TMD, such as the optimal tuning frequency and optimal damping ratio, to stationary Gaussian white noise

Keywords： tuned mass damper     parametric optimization     passive control     white noise     earthquake excitation    

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Title Author Date Type Operation

Electromagnetic interference modeling and suppression techniques in variable-frequency drive systems

Le YANG, Shuo WANG, Jianghua FENG

Journal Article

High Spatial Resolution Ozone Profiles Retrieved from the First Chinese Ultraviolet–Visible Hyperspectral Satellite Instrument

Fei Zhao, Cheng Liu, Qihou Hu, Congzi Xia, Chengxin Zhang, Wenjing Su

Journal Article

Identification of cadmium-induced genes in maize seedlings by suppression subtractive hybridization

Quanlin DAI, Baifei HUANG, Zhongyi YANG, Jiangang YUAN, Junzhi YANG

Journal Article

Vibration suppression of speed-controlled robots with nonlinear control

Paolo BOSCARIOL,Alessandro GASPARETTO

Journal Article

Study on concoction and water mist fire suppression performance of new composite additives

Liu Jianghong,Jin Xiang,Liao Guangxuan

Journal Article

A convolutional neural network based approach to sea clutter suppression for small boat detection

Guan-qing Li, Zhi-yong Song, Qiang Fu,liguanqing09@nudt.edu.cn,songzhiyong08@nudt.edu.cn

Journal Article

Design of noise-reduction seats for high-speed trains

Xiaojun DENG, Yanju ZHAO, Haijin ZHANG, Renzhong SHUAI, Leiwei ZHU

Journal Article

Improvement of engine performance with high compression ratio based on knock suppression using Miller

Haiqiao WEI, Jie YU, Lei ZHOU

Journal Article

Anovel approach of noise statistics estimate using H∞ filter in target tracking

Xie WANG,Mei-qin LIU,Zhen FAN,Sen-lin ZHANG

Journal Article

Ambient Noise Tomography for Coral Islands

Shaohong Xia, Changrong Zhang, Jinghe Cao

Journal Article

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

LI Chunxi, WANG Songling

Journal Article

Application of python-based Abaqus preprocess and postprocess technique in analysis of gearbox vibration and noise

Guilian YI, Yunkang SUI, Jiazheng DU

Journal Article

Growth suppression of colorectal cancer expressing S492R EGFR by monoclonal antibody CH12

Qiongna Dong, Bizhi Shi, Min Zhou, Huiping Gao, Xiaoying Luo, Zonghai Li, Hua Jiang

Journal Article

Integrated virtual-design methods for forecasting radiated noise of single cylinder diesel block

GUO Lei, HAO Zhiyong, XU Hongmei, LIU Lianyun

Journal Article

of structural responses using an optimal passive tuned mass damper under stationary Gaussian white noise

Min-Ho CHEY, Jae-Ung KIM

Journal Article