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Electrospinning of polycarbonate urethane biomaterials

Yakai FENG, Fanru MENG, Ruofang XIAO, Haiyang ZHAO, Jintang GUO

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 1,   Pages 11-18 doi: 10.1007/s11705-010-1011-x

Abstract: The results show that nano-fibers with a narrow diameter distribution and a few defects were obtainedWhen the electric voltage was set between 22 and 32 kV, the average diameters of the fibers were foundScanning electron microscopy (SEM) images showed that fiber diameter and structural morphology of theHowever, when the PCU concentration was over 14.0 wt-%, the average diameter of fibers became large,The average diameter of nanofibers increased linearly with increasing the volume flow rate of the PCU

Keywords： electrospinning     polycarbonate urethane     process parameter     average diameter     morphology    

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Study on variational principles of smoke particle shape and dimension with water mist appling

Fang Yudong

Strategic Study of CAE 2014, Volume 16, Issue 2,   Pages 93-100

Abstract: It was seen by statistical analysis that the average diameter of soot particle increased and the surface

Keywords： water mist     smoke particle     surface density     average diameter    

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Performance prediction of switched reluctance generator with time average and small signal models

Jyoti KOUJALAGI, B. UMAMAHESWARI, R. ARUMUGAM

Frontiers in Energy 2013, Volume 7, Issue 1,   Pages 56-68 doi: 10.1007/s11708-012-0216-8

Abstract: complete mathematical model and predicts the performance of switched reluctance generator with time averageNext, based on the switching behaviour, a time average model is obtained to measure the difference between

Keywords： generator     reluctance     switching model     small signal model     time average model    

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A case study on sample average approximation method for stochastic supply chain network design problem

Yuan WANG, Ruyan SHOU, Loo Hay LEE, Ek Peng CHEW

Frontiers of Engineering Management 2017, Volume 4, Issue 3,   Pages 338-347 doi: 10.15302/J-FEM-2017032

Abstract: Deterministic equivalent model with nonanticipativity constraints, branch-and-fix coordination, sample average

Keywords： supply chain network     stochastic demand     sampling average approximation     Bayesian bootstrap     Latin hypercube    

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Experimental study on average movement characteristics of bed-load particles

Limo TANG, Xingkui WANG,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4,   Pages 435-439 doi: 10.1007/s11709-009-0050-1

Abstract: The average movement characteristics of the particles are analyzed by statistics.The results show that the longitudinal average velocities of the particles neither agree with the law

Keywords： different     longitudinal     three-dimensional     particle     Bagnold    

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Investigation of bubble diameter and flow regime between water and dilute aqueous ethanol solutions in

Baharak SAJJADI, Mostafa Keshavarz MORAVEJI, Reza DAVARNEJAD

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 2,   Pages 194-202 doi: 10.1007/s11705-010-1019-2

Abstract: In this study, the effect of ethanol addition into pure water and its concentration on bubble diameterAlcohol concentration enhancement caused bubble diameter to decrease.Furthermore, the bubbles diameter in pure water was nearly 4 times higher than that of ethanol with concentration

Keywords： airlift rector     bubble diameter     gas hold-up     flow regime     ethanol    

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Accounting for the uncertainties in the estimation of average shear wave velocity using – correlations

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1199-1208 doi: 10.1007/s11709-021-0749-1

Abstract: Further, the average shear wave velocity of the top 30 m soil cover ( V S30) is estimated

Keywords： uncertainties     V S– N correlations     V S30     SPT data     statistical methodology    

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Impacts of different diameter combinations on the temperature of a crude oil pipeline when colocating

Bo YU, Yue SHI, Xin LIU, Jinjun ZHANG, Jinjia WEI,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 192-197 doi: 10.1007/s11708-009-0074-1

Abstract: In order to show the effects of different diameter combinations on crude oil temperature when a crudeoil pipeline and a products pipeline are laid in one trench, four typical diameter combinations areIn real pipeline constructions, the effects of other diameter combinations on crude oil temperature canbe predicted by the method of linear interpolation to calculate results of the four diameter combinations

Keywords： technology of laying two pipelines in one trench     diameter combinations     crude oil temperature     pipeline    

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Effects of slip length and hydraulic diameter on hydraulic entrance length of microchannels with superhydrophobic

Wenchi GONG, Jun SHEN, Wei DAI, Zeng DENG, Xueqiang DONG, Maoqiong GONG

Frontiers in Energy 2020, Volume 14, Issue 1,   Pages 127-138 doi: 10.1007/s11708-020-0661-8

Abstract: This paper investigated effects of slip length and hydraulic diameter on the hydraulic entrance lengthincreases with the increasing slip length at approximately Re<10, and does not vary with the hydraulic diameter

Keywords： laminar flow     hydraulic entrance length     super hydrophobic surface     slip length     hydraulic diameter    

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Assembling and defect treatment of large-diameter shield segment

Cheng Xuewu,Xu Weiqing,Yang Zhiyong

Strategic Study of CAE 2010, Volume 12, Issue 12,   Pages 89-93

Abstract:

In the paper, the segment assembling techniques of large-diameter shieldwere summarized, and the apparent damage reasons and repair technology of large-diameter shield reinforcedconcrete segment in the construction were preliminarily analyzed, based on research of the underground diameterabove hance and below hance, respectively, assuring the good strength and surface quality of large-diameter

Keywords： large-diameter shield     segment     assembling     repair    

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Stability analysis of large diameter thin-walled tube beam-columns

PAN Hanming, GUO Yanlin, LIANG Shuo, PEI Shengxing, LIANG Weisheng, WANG Lewen

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2,   Pages 123-132 doi: 10.1007/s11709-008-0017-7

Abstract: Based on a blind spot in the current design standard of steel structures, the large diameter thin-walledThe influence of several factors on stability capacity of the large diameter thin-walled tube beam-columnscalculation formulas of the stability bearing capacity are presented for beam-column members of the large diameter

Keywords： ultimate strength     nonlinear     numerical analytical     diameter thin-walled     practice    

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Influence of sprinkler irrigation droplet diameter, application intensity and specific power on flower

Yisheng ZHANG, Delan ZHU

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2,   Pages 165-171 doi: 10.15302/J-FASE-2017145

Abstract: The influences of different parameters such as droplet diameter, application intensity, specific powerApplication intensity was also correlated with injury when the droplet diameter was larger than 1 mm.

Keywords： application intensity     damage     floriculture     flowers     specific power     sprinkler irrigation    

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A new performance evaluation method and its application in fin-tube surface design of small diameter

Jufang FAN, Weikun DING, Zhigeng WU, Yaling HE, Wenquan TAO, Yongxin ZHENG, Yifeng GAO, Ji SONG

Frontiers in Energy 2011, Volume 5, Issue 1,   Pages 59-68 doi: 10.1007/s11708-010-0132-8

Abstract: In this paper, a simple yet efficient performance comparison method is proposed based on the assumptions of constant properties and identical frontal area. For this method, no correlations are required, and a small number of discrete data are sufficient. To illustrate the feasibility of the proposed approach, a new slotted fin with 4 mm tubes is designed to replace the original louvered fin with tubes of 7 mm. The orthogonal design method is adopted in the fin design to reduce the number of computational cases significantly, and yet a nearly optimum combination of major geometric factors can still be obtained. The reasonable parametric combination of 3 global parameters is obtained by analyzing the numerical results of 16 plain plate fins. Based on this result, 3 new slotted fins with different fin pitches are studied. The slotted fin with a fin pitch of 1.4 mm is recommended after considering the heat transfer, comprehensive performance, and cost of material and operation. The result shows that compared with the original louvered fin, the recommended fin not only increases the heat transfer rate by 2.2%, 22.5%, and 13.7% under an identical flow rate, identical pressure drop, and identical pumping power constraint, respectively, but also saves approximately 36% of the copper tube materials.

Keywords： performance evaluation     orthogonal design     small-diameter tube    

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The adaptability analysis of cutter tool to slurry shield of Beijing railway underground diameter line

He Feng,Li Xiaogang,Sun Shanhui

Strategic Study of CAE 2010, Volume 12, Issue 12,   Pages 35-40

Abstract:

Based on the underground diameter line engineering experience from Beijing

Keywords： diameter line     slurry shield     cutter tool     adaptability    

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Cutting Force Model for a Small-diameter Helical Milling Cutter

LI Xiwen, YANG Shuzi, YANG Mingjin, XIE Shouyong

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3,   Pages 272-277 doi: 10.1007/s11465-007-0047-1

Abstract: milling process, the major flank wear land area (two-dimensional measurement for the wear) of a small-diameterprovide a theoretical foundation for monitoring the condition of a milling process that uses a small-diameter

Keywords： computational     corresponding     helical milling     theoretical foundation     Characteristic    

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Title Author Date Type Operation

Electrospinning of polycarbonate urethane biomaterials

Yakai FENG, Fanru MENG, Ruofang XIAO, Haiyang ZHAO, Jintang GUO

Journal Article

Study on variational principles of smoke particle shape and dimension with water mist appling

Fang Yudong

Journal Article

Performance prediction of switched reluctance generator with time average and small signal models

Jyoti KOUJALAGI, B. UMAMAHESWARI, R. ARUMUGAM

Journal Article

A case study on sample average approximation method for stochastic supply chain network design problem

Yuan WANG, Ruyan SHOU, Loo Hay LEE, Ek Peng CHEW

Journal Article

Experimental study on average movement characteristics of bed-load particles

Limo TANG, Xingkui WANG,

Journal Article

Investigation of bubble diameter and flow regime between water and dilute aqueous ethanol solutions in

Baharak SAJJADI, Mostafa Keshavarz MORAVEJI, Reza DAVARNEJAD

Journal Article

Accounting for the uncertainties in the estimation of average shear wave velocity using – correlations

Journal Article

Impacts of different diameter combinations on the temperature of a crude oil pipeline when colocating

Bo YU, Yue SHI, Xin LIU, Jinjun ZHANG, Jinjia WEI,

Journal Article

Effects of slip length and hydraulic diameter on hydraulic entrance length of microchannels with superhydrophobic

Wenchi GONG, Jun SHEN, Wei DAI, Zeng DENG, Xueqiang DONG, Maoqiong GONG

Journal Article

Assembling and defect treatment of large-diameter shield segment

Cheng Xuewu,Xu Weiqing,Yang Zhiyong

Journal Article

Stability analysis of large diameter thin-walled tube beam-columns

PAN Hanming, GUO Yanlin, LIANG Shuo, PEI Shengxing, LIANG Weisheng, WANG Lewen

Journal Article

Influence of sprinkler irrigation droplet diameter, application intensity and specific power on flower

Yisheng ZHANG, Delan ZHU

Journal Article

A new performance evaluation method and its application in fin-tube surface design of small diameter

Jufang FAN, Weikun DING, Zhigeng WU, Yaling HE, Wenquan TAO, Yongxin ZHENG, Yifeng GAO, Ji SONG

Journal Article

The adaptability analysis of cutter tool to slurry shield of Beijing railway underground diameter line

He Feng,Li Xiaogang,Sun Shanhui

Journal Article

Cutting Force Model for a Small-diameter Helical Milling Cutter

LI Xiwen, YANG Shuzi, YANG Mingjin, XIE Shouyong

Journal Article