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Ribbed strip rolling by three-dimensional finite element method combining extremely thin array of elements

Zhengyi JIANG,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1,   Pages 52-60 doi: 10.1007/s11465-009-0087-9

Abstract: three-dimensional finite element modelling of the ribbed strip rolling is carried out, coupling the use of an extremelythin array of elements that is equivalent to the calculation of the additional shear deformation work

Keywords： rib inclined contact boundary condition     ribbed strip     extremely thin elements     pulling down of rib height    

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Review on Alkali Element Doping in Cu(In,Ga)Se2 Thin Films and Solar Cells

Yun Sun,Shuping Lin,Wei Li,Shiqing Cheng,Yunxiang Zhang,Yiming Liu,Wei Liu

Engineering 2017, Volume 3, Issue 4,   Pages 452-459 doi: 10.1016/J.ENG.2017.04.020

Abstract: post-deposition treatment (PDT), we discuss and interpret the following issues: ① The delamination of CIGS thin

Keywords： Alkali elements     Cu(In     Ga)Se2     Thin-film solar cells     Post-deposition treatment    

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Assessment of mobile and potential mobile trace elements extractability in calcareous soils using different

Mohsen Jalali, Ziba Hurseresht

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1186-4

Abstract: In NH4OAc, DTPA, and EDTA, the possibility of re-adsorption of trace elements is low.Understanding trace elements mobility in soils, extracting agents, and their relationships with soilThe speciation of extracted trace elements in solutions indicated that in the CaCl2, NaNO3, NH4NO3, andThe results of speciation of trace elements using NH4OAc, DTPA, and EDTA extracting agents showed thatThe results of this study are useful for short and long-term evaluations of trace elements mobility and

Keywords： Mobility     Calcareous soils     Extracting agents     Trace elements    

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Wavelet-based iterative data enhancement for implementation in purification of modal frequency for extremely

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 446-472 doi: 10.1007/s11709-019-0605-8

Abstract: The main purpose of the present study is to enhance high-level noisy data by a wavelet-based iterative filtering algorithm for identification of natural frequencies during ambient wind vibrational tests on a petrochemical process tower. Most of denoising methods fail to filter such noise properly. Both the signal-to-noise ratio and the peak signal-to-noise ratio are small. Multiresolution-based one-step and variational-based filtering methods fail to denoise properly with thresholds obtained by theoretical or empirical method. Due to the fact that it is impossible to completely denoise such high-level noisy data, the enhancing approach is used to improve the data quality, which is the main novelty from the application point of view here. For this iterative method, a simple computational approach is proposed to estimate the dynamic threshold values. Hence, different thresholds can be obtained for different recorded signals in one ambient test. This is in contrast to commonly used approaches recommending one global threshold estimated mainly by an empirical method. After the enhancements, modal frequencies are directly detected by the cross wavelet transform (XWT), the spectral power density and autocorrelation of wavelet coefficients. Estimated frequencies are then compared with those of an undamaged-model, simulated by the finite element method.

Keywords： ambient vibration test     high level noise     iterative signal enhancement     wavelet     cross and autocorrelation of wavelets    

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Experimental study and product analysis of lignocellulosic biomass hydrolysis under extremely low acids

WANG Shurong, LUO Zhongyang, CEN Kefa, ZHUANG Xinshu

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 268-272 doi: 10.1007/s11708-008-0046-x

Abstract: Using our self-designed facility for lignocellulosic biomass hydrolysis under extremely low acid, and

Keywords： HPLC     oligosaccharide     lignocellulosic     chromatography     reducing    

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Linking elements to outcomes of knowledge transfer in the project environment: Current review and future

Frontiers of Engineering Management 2022, Volume 9, Issue 2,   Pages 221-238 doi: 10.1007/s42524-022-0195-3

Abstract: However, the current research on the elements and outcomes of knowledge transfer (KT) in the projectThis study aims to conduct comprehensive research to determine and link the elements and outcomes ofFive-dimensional transfer elements and two-dimensional transfer outcomes were then identified and analyzedLastly, the relationships between the transfer elements and outcomes were gathered to create a comprehensiveThis study builds a theoretical framework linking transfer elements to outcomes that can serve as a basis

Keywords： knowledge transfer     knowledge management     project management     project environment     literature review    

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Fixturing technology and system for thin-walled parts machining: a review

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0711-5

Abstract: During the overall processing of thin-walled parts (TWPs), the guaranteed capability of the machining

Keywords： thin-walled part (TWP)     fixture     machining     fixture categories     fixture function    

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A family of non-conforming crack front elements of quadrilateral and triangular types for 3D crack problems

Guizhong XIE, Fenglin ZHOU, Hao LI, Xiaoyu WEN, Fannian MENG

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3,   Pages 332-341 doi: 10.1007/s11465-019-0540-3

Abstract: This study focuses on establishing non-conforming crack front elements of quadrilateral and triangularIn the developed quadrilateral and triangular crack front elements, the asymptotic term, which capturescrack problems are presented to illustrate the validity and efficiency of the developed crack front elements

Keywords： Taylor expansion     crack front elements     stress intensity factors     dual boundary element method    

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A measurement system for thin elastohydrodynamic lubrication films

WANG Xuefeng, GUO Feng, YANG Peiran

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 193-196 doi: 10.1007/s11465-007-0032-8

Abstract: lubricating films from nano to micro scales at a nano-level resolution, and can be used to investigate ultra-thin

Keywords： instrumentation     continuous measurement     elastohydrodynamic lubrication     ultra-thin     measurement    

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Position-varying surface roughness prediction method considering compensated acceleration in milling of thin-walled

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 855-867 doi: 10.1007/s11465-021-0649-z

Abstract: Machined surface roughness will affect parts’ service performance. Thus, predicting it in the machining is important to avoid rejects. Surface roughness will be affected by system position dependent vibration even under constant parameter with certain toolpath processing in the finishing. Aiming at surface roughness prediction in the machining process, this paper proposes a position-varying surface roughness prediction method based on compensated acceleration by using regression analysis. To reduce the stochastic error of measuring the machined surface profile height, the surface area is repeatedly measured three times, and Pauta criterion is adopted to eliminate abnormal points. The actual vibration state at any processing position is obtained through the single-point monitoring acceleration compensation model. Seven acceleration features are extracted, and valley, which has the highest R-square proving the effectiveness of the filtering features, is selected as the input of the prediction model by mutual information coefficients. Finally, by comparing the measured and predicted surface roughness curves, they have the same trends, with the average error of 16.28% and the minimum error of 0.16%. Moreover, the prediction curve matches and agrees well with the actual surface state, which verifies the accuracy and reliability of the model.

Keywords： surface roughness prediction     compensated acceleration     milling     thin-walled workpiece    

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Operating characteristic analysis on the ultra-thin low temperature floor-heating system

Hualing ZHANG, Xiaopeng SONG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 127-132 doi: 10.1007/s11709-013-0200-3

Abstract: Prefabricated ultra-thin radiant heating panel, as a new heating terminal type, is becoming a highlight

Keywords： ultra-thin floor heating panel     the preheating time     thermal comfort     energy saving    

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Assessment of leaching behavior and human bioaccessibility of rare earth elements in typical hospital

Chunfeng Wang, Guanfei Chen, Yanchen Zhu, Dan Yao, Wanfeng Wang, Lianjun Wang

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 6, doi: 10.1007/s11783-017-0946-2

Abstract: Leaching behavior and gastrointestinal bioaccessibility of rare earth elements (REEs) from hospital waste

Keywords： Assessment     Rare earth elements     Leaching behavior     Bioaccessibility     Hospital waste    

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Preconcentration of trace elements by adsorption onto a niobium wire for electrothermal atomization atomic

Satoshi KANECO, Hiroaki KITANAGA, Hideyuki KATSUMATA, Tohru SUZUKI

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4,   Pages 432-435 doi: 10.1007/s11705-012-1219-z

Abstract: In the present work, a new preconcentration method of trace elements by adsorption onto a niobium wire

Keywords： niobium wire     electrothermal atomization atomic absorption spectrometry     tungsten tube atomizer     trace elements    

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An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 293-297 doi: 10.1007/s11709-007-0038-7

Abstract: In this paper, an analytical method is proposed for calculating torsional constants for complicated thin-walledFinally, a complicated thin-walled cross-section is given as a valid numerical example to verify the

Keywords： homogeneous     complicated thin-walled     numerical example     advantage     torsional function    

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Recent development and application of thin-film thermoelectric cooler

Yuedong Yu, Wei Zhu, Xixia Kong, Yaling Wang, Pengcheng Zhu, Yuan Deng

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 4,   Pages 492-503 doi: 10.1007/s11705-019-1829-9

Abstract: Recently, the performance and fabrication of thin-film thermoelectric materials have been largely enhancedBased on this enhancement, the thin-film thermoelectric cooler (TEC) is becoming a research hot topicof a thin-film TEC.Moreover, the architecture of a thin-film TEC should also be properly designed.Furthermore, the design, fabrication, as well as the performance of thin-film TECs were summarized.

Keywords： thin-film thermoelectric cooler     interfaces     cooling flux     TE device fabrication    

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Title Author Date Type Operation

Ribbed strip rolling by three-dimensional finite element method combining extremely thin array of elements

Zhengyi JIANG,

Journal Article

Review on Alkali Element Doping in Cu(In,Ga)Se2 Thin Films and Solar Cells

Yun Sun,Shuping Lin,Wei Li,Shiqing Cheng,Yunxiang Zhang,Yiming Liu,Wei Liu

Journal Article

Assessment of mobile and potential mobile trace elements extractability in calcareous soils using different

Mohsen Jalali, Ziba Hurseresht

Journal Article

Wavelet-based iterative data enhancement for implementation in purification of modal frequency for extremely

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI

Journal Article

Experimental study and product analysis of lignocellulosic biomass hydrolysis under extremely low acids

WANG Shurong, LUO Zhongyang, CEN Kefa, ZHUANG Xinshu

Journal Article

Linking elements to outcomes of knowledge transfer in the project environment: Current review and future

Journal Article

Fixturing technology and system for thin-walled parts machining: a review

Journal Article

A family of non-conforming crack front elements of quadrilateral and triangular types for 3D crack problems

Guizhong XIE, Fenglin ZHOU, Hao LI, Xiaoyu WEN, Fannian MENG

Journal Article

A measurement system for thin elastohydrodynamic lubrication films

WANG Xuefeng, GUO Feng, YANG Peiran

Journal Article

Position-varying surface roughness prediction method considering compensated acceleration in milling of thin-walled

Journal Article

Operating characteristic analysis on the ultra-thin low temperature floor-heating system

Hualing ZHANG, Xiaopeng SONG

Journal Article

Assessment of leaching behavior and human bioaccessibility of rare earth elements in typical hospital

Chunfeng Wang, Guanfei Chen, Yanchen Zhu, Dan Yao, Wanfeng Wang, Lianjun Wang

Journal Article

Preconcentration of trace elements by adsorption onto a niobium wire for electrothermal atomization atomic

Satoshi KANECO, Hiroaki KITANAGA, Hideyuki KATSUMATA, Tohru SUZUKI

Journal Article

An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Journal Article

Recent development and application of thin-film thermoelectric cooler

Yuedong Yu, Wei Zhu, Xixia Kong, Yaling Wang, Pengcheng Zhu, Yuan Deng

Journal Article