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Discussion on back-to-back two-stage centrifugal compressor compact design techniques

Lei HUO, Huoxing LIU

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 390-400 doi: 10.1007/s11465-013-0278-2

Abstract:

Design a small flow back-to-back two-stage centrifugal compressor in the aviation turbocharger, theTherefore, the stationary part of the back-to-back two-stage centrifugal compressor should pay full attention

Keywords： back-to-back     two-stage     centrifugal compressor     design     Internal flow    

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DFIG sliding mode control fed by back-to-back PWM converter with DC-link voltage control for variable

Youcef BEKAKRA,Djilani BEN ATTOUS

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 345-354 doi: 10.1007/s11708-014-0330-x

Abstract: control of doubly fed induction generator (DFIG) with the rotor connected to the electric grid through a back-to-backA proportional-integral-(PI) controller is used to keep the DC-link voltage constant for a back-to-back

Keywords： doubly fed induction generator (DFIG)     wind turbine     back-to-back pulse width modulation (PWM)     DC-link    

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Simulation of grid connection and maximum power point tracking control of brushless doubly-fed generator in wind power system

Hicham SERHOUD, Djilani BENATTOUS

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 380-387 doi: 10.1007/s11708-013-0252-z

Abstract: In this paper, based on the analysis of the mathematical model in a common synchronous reference frame of the brushless doubly-fed generator (BDFG), the grid connection strategy and maximum energy extraction control were both analyzed. Besides, the transient simulation of no-load model and generation model of the BDFG have been developed on the MATLAB/Simulink platform. The test results during cutting-in grid confirmed the good dynamic performance of grid synchronization and effective power control approach for the BDFG-based variable speed wind turbines.

Keywords： brushless doubly-fed generator (BDFG)     modeling     grid connection control     back-to-back pulse-width modulation    

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Choosing configurations of transmission line tower grounding by back flashover probability value

Dmitry KUKLIN

Frontiers in Energy 2016, Volume 10, Issue 2,   Pages 213-226 doi: 10.1007/s11708-016-0398-6

Abstract: The probability of back flashover, which provides both qualitative and quantitative estimate of the groundingDifferent approaches are examined for identifying the back flashover probability, as not only amplitudesIt is found that lightning current waveform can greatly influence calculated back flashover probability

Keywords： grounding     transmission line tower     back flashover probability     FDTD method    

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Renewable synthetic fuel: turning carbon dioxide back into fuel

Frontiers in Energy 2022, Volume 16, Issue 2,   Pages 145-149 doi: 10.1007/s11708-022-0828-6

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Acupuncture is ineffective for chronic low back pain? A critical analysis and rethinking

Xuqiang Wei, Baoyan Liu

Frontiers of Medicine 2021, Volume 15, Issue 5,   Pages 767-775 doi: 10.1007/s11684-020-0785-6

Abstract: Acupuncture is a promising treatment for relieving pain and improving lower back function in clinicalMost RCTs conclude that acupuncture procedures for chronic low back pain (CLBP) had no significant difference

Keywords： chronic low back pain     sham acupuncture     acupuncture     methodology     therapeutic evaluation    

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Take back and treatment of discarded electronics: a scientific update

Ab STEVELS, Jaco HUISMAN, Feng WANG, Jinhui LI, Boyang LI, Huabo DUAN

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 4,   Pages 475-482 doi: 10.1007/s11783-013-0538-8

Abstract: This paper indicates that the performance of tack-back and treatment of electronic waste (e-waste) system

Keywords： e-waste     take back     treatment     substantially    

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Review on New Theories and Methods in Prototype Back Analysis of Dam

Gu Chongshi,Wu Zhongru

Strategic Study of CAE 2001, Volume 3, Issue 8,   Pages 76-81

Abstract:

Based on the study of the present theories and application in prototype back analysis of dam, thehot problems which need to be solved urgently in back analysis are pointed out and studied.Some new back analysis theories and methods are introduced.

Keywords： dam     prototype back analysis     application    

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Using hybrid models to predict blood pressure reactivity to unsupported back based on anthropometric

Gurmanik KAUR,Ajat Shatru ARORA,Vijender Kumar JAIN

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 6,   Pages 474-485 doi: 10.1631/FITEE.1400295

Abstract: Guidelines on measurement of BP contain recommendations on the position of the back of the participantsby advising that they should sit with supported back to avoid spuriously high readings.squares support vector machine (LS-SVM) model for the prediction of BP reactivity to an unsupported back

Keywords： Blood pressure (BP)     Principal component analysis (PCA)     Forward stepwise regression     Artificial neural network (ANN)     Adaptive neuro-fuzzy inference system (ANFIS)     Least squares support vector machine (LS-SVM)    

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Surgical robotics: A look-back of latest advancement and bio-inspired ways to tackle existing challenges

Yang LIU, Jing LIU

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 376-384 doi: 10.1007/s11465-012-0352-1

Abstract:

This article is dedicated to present a review on existing challenges and latest developments in surgical robotics in attempts to overcome the obstacles lying behind. Rather than to perform an exhaustive evaluation, we would emphasize more on the new insight by digesting the emerging bio-inspired surgical technologies with potentials to revolutionize the field. Typical approaches, possible applications, advantages and technical challenges were discussed. Evolutions of surgical robotics and future trends were analyzed. It can be found that, the major difficulties in the field of surgical robots may not be properly addressed by only using conventional approaches. As an alternative, bio-inspired methods or materials may shed light on new innovations. While endeavors to deal with existing strategies still need to be made, attentions should be paid to also borrow ideas from nature.

Keywords： minimally invasive surgery     surgical robotics     haptic feedback     miniaturization     bio-inspiration     bionics    

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hexavalent chromium using a porous titanium flow-through electrode and intelligent prediction based on a back

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1697-x

Abstract:

● Titanium-based flow-through electrode achieved high Cr(VI) reduction efficiency.

Keywords： Flow-through electrode     Hexavalent chromium     Heavy metals     Neural network     Artificial intelligence    

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Day-ahead electricity price forecasting using back propagation neural networks and weighted least square

S. Surender REDDY,Chan-Mook JUNG,Ko Jun SEOG

Frontiers in Energy 2016, Volume 10, Issue 1,   Pages 105-113 doi: 10.1007/s11708-016-0393-y

Abstract: This paper proposes the day-ahead electricity price forecasting using the artificial neural networks (ANN) and weighted least square (WLS) technique in the restructured electricity markets. Price forecasting is very important for online trading, e-commerce and power system operation. Forecasting the hourly locational marginal prices (LMP) in the electricity markets is a very important basis for the decision making in order to maximize the profits/benefits. The novel approach proposed in this paper for forecasting the electricity prices uses WLS technique and compares the results with the results obtained by using ANNs. To perform this price forecasting, the market knowledge is utilized to optimize the selection of input data for the electricity price forecasting tool. In this paper, price forecasting for Pennsylvania-New Jersey-Maryland (PJM) interconnection is demonstrated using the ANNs and the proposed WLS technique. The data used for this price forecasting is obtained from the PJM website. The forecasting results obtained by both methods are compared, which shows the effectiveness of the proposed forecasting approach. From the simulation results, it can be observed that the accuracy of prediction has increased in both seasons using the proposed WLS technique. Another important advantage of the proposed WLS technique is that it is not an iterative method.

Keywords： day-ahead electricity markets     price forecasting     load forecasting     artificial neural networks     load serving entities    

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of using amorphous silicon stack as front heterojunction structure on performance of interdigitated back

Rui JIA,Ke TAO,Qiang LI,Xiaowan DAI,Hengchao SUN,Yun SUN,Zhi JIN,Xinyu LIU

Frontiers in Energy 2017, Volume 11, Issue 1,   Pages 96-104 doi: 10.1007/s11708-016-0434-6

Abstract: Interdigitated back contact-heterojunction (IBC-HJ) solar cells can have a conversion efficiency of over

Keywords： amorphous silicon     front surface field     simulations     interdigitated back contact-heterojunction solar cells    

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Coming Back from a Trip on High-Speed Trains in the 2040s

Ignacio Barron

Engineering 2016, Volume 2, Issue 3,   Pages 292-293 doi: 10.1016/J.ENG.2016.03.020

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Back-End Electronics Manufacturing Equipment in China and Their Key Components

Chen Xin , Chen Yun , Chen Xun , Wu Xiaojie

Strategic Study of CAE 2022, Volume 24, Issue 4,   Pages 74-84 doi: 10.15302/J-SSCAE-2022.04.008

Abstract: chains of global electronics manufacturing industry are currently being reshaped, conducting research on back-endThis study analyzed the development status and trends of the back-end electronics manufacturing equipmentFurthermore, corresponding countermeasures for the development of China’s back-end electronicsTypical back-end electronics manufacturing equipment.Key back-end electronics manufacturing technologies requiring further research and development.

Keywords： back-end electronics manufacturing     supply chain reshaping     electronics manufacturing equipment     multi-chip    

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Title Author Date Type Operation

Discussion on back-to-back two-stage centrifugal compressor compact design techniques

Lei HUO, Huoxing LIU

Journal Article

DFIG sliding mode control fed by back-to-back PWM converter with DC-link voltage control for variable

Youcef BEKAKRA,Djilani BEN ATTOUS

Journal Article

Simulation of grid connection and maximum power point tracking control of brushless doubly-fed generator in wind power system

Hicham SERHOUD, Djilani BENATTOUS

Journal Article

Choosing configurations of transmission line tower grounding by back flashover probability value

Dmitry KUKLIN

Journal Article

Renewable synthetic fuel: turning carbon dioxide back into fuel

Journal Article

Acupuncture is ineffective for chronic low back pain? A critical analysis and rethinking

Xuqiang Wei, Baoyan Liu

Journal Article

Take back and treatment of discarded electronics: a scientific update

Ab STEVELS, Jaco HUISMAN, Feng WANG, Jinhui LI, Boyang LI, Huabo DUAN

Journal Article

Review on New Theories and Methods in Prototype Back Analysis of Dam

Gu Chongshi,Wu Zhongru

Journal Article

Using hybrid models to predict blood pressure reactivity to unsupported back based on anthropometric

Gurmanik KAUR,Ajat Shatru ARORA,Vijender Kumar JAIN

Journal Article

Surgical robotics: A look-back of latest advancement and bio-inspired ways to tackle existing challenges

Yang LIU, Jing LIU

Journal Article

hexavalent chromium using a porous titanium flow-through electrode and intelligent prediction based on a back

Journal Article

Day-ahead electricity price forecasting using back propagation neural networks and weighted least square

S. Surender REDDY,Chan-Mook JUNG,Ko Jun SEOG

Journal Article

of using amorphous silicon stack as front heterojunction structure on performance of interdigitated back

Rui JIA,Ke TAO,Qiang LI,Xiaowan DAI,Hengchao SUN,Yun SUN,Zhi JIN,Xinyu LIU

Journal Article

Coming Back from a Trip on High-Speed Trains in the 2040s

Ignacio Barron

Journal Article

Back-End Electronics Manufacturing Equipment in China and Their Key Components

Chen Xin , Chen Yun , Chen Xun , Wu Xiaojie

Journal Article