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Secondary transfer length and residual prestress of fractured strand in post-tensioned concrete beams

Frontiers of Structural and Civil Engineering   Pages 388-400 doi: 10.1007/s11709-022-0809-1

Abstract: transfer length and residual prestress of fractured strand.A numerical model is developed and used to predict the secondary transfer length and residual prestressResults shows that the fractured strand can be re-anchored in concrete through the secondary anchorage, and the secondary transfer length of fractured strand with the diameter of 15.2 mm is 1133 mm.The residual prestress of fractured strand increases gradually in the secondary transfer length, and

Keywords： post-tensioned concrete beams     strand fracture     secondary transfer length     residual prestress    

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Experimental study of primary and secondary side coupling natural convection heat transfer characteristics

Zhimin QIU, Daogang LU, Jingpin FU, Li FENG, Yuhao ZHANG

Frontiers in Energy 2021, Volume 15, Issue 4,   Pages 860-871 doi: 10.1007/s11708-021-0744-1

Abstract: The primary and secondary side coupling heat transfer characteristics of the passive residual heat removalTherefore, it is necessary to investigate the heat transfer characteristics and develop applicable heattransfer formulas for optimized design.For the local PRHR HX heat transfer performance, traditional natural convection correlations for bothMoreover, the revised natural convection heat transfer correlations based on the present experimental

Keywords： passive residual heat removal heat exchanger (PRHR HX)     C-shape tube     revised heat transfer correlations    

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Research on analysis method of suspension bridge based on ANSYS

Xie Xuefeng and Luo Xiheng

Strategic Study of Chinese Academy of Engineering 2012, Volume 14, Issue 5,   Pages 101-105

Abstract: This paper focuses on ANSYS-secondary-development and makes it possible to analyze suspension bridgespaper is dedicated to saddle simulation,incremental launching realization and how to obtain unstressed length

Keywords： suspension bridge     ANSYS-secondary-development     saddle     incremental launching     unstressed length     iteration    

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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 lengthIt is found that superhydrophobic microchannels have a longer hydraulic entrance length than that ofThe dimensionless hydraulic entrance length slightly increases with the increasing slip length at approximatelyA new correlation to predict the entrance length in square microchannels with different slip lengthsmicrochannels, but also suggest that super hydrophobic microchannels have more significant advantages for heat transfer

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

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Structural behavior of intermediate length cold-formed steel rack columns with C-stitches

M. ANBARASU, Mahmud ASHRAF

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 937-949 doi: 10.1007/s11709-019-0528-4

Abstract: presents an experimental and numerical investigation on the strength and performance of intermediate lengthused to carry out a parametric study to examine changes in structural response due to variations in length

Keywords： cold-formed steel columns     C-stitches     intermediate length columns     distortional buckling    

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Modelling of dynamic contact length in rail grinding process

Shaodan ZHI,Jianyong LI,A. M. ZAREMBSKI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3,   Pages 242-248 doi: 10.1007/s11465-014-0305-y

Abstract: First of all, it’s important to analyze the contact length between the grinding stone and the rail, because the contact length is a critical parameter to measure the grinding capabilities of stones.Therefore the theoretical model for contact length is developed based on the geometrical analysis.

Keywords： rail grinding     contact length     dynamic model     Hamiltonian system     grinding stone     rail grinding car    

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Association between telomere length and survival in cancer patients: a meta-analysis and review of literature

Xinsen Xu,Kai Qu,Qing Pang,Zhixin Wang,Yanyan Zhou,Chang Liu

Frontiers of Medicine 2016, Volume 10, Issue 2,   Pages 191-203 doi: 10.1007/s11684-016-0450-2

Abstract:

The relationship between telomere length and cancer survival has been widely studied.A total of 29 studies evaluated telomere length in the peripheral blood; 22 studies evaluated telomerelength in the tumor tissue.First, in the peripheral blood studies, for solid tumor patients with shortened telomere length, thepatients with lower telomere length ratios, the combined HRs were 0.66 (95%CI, 0.53–0.83) and

Keywords： telomere     survival     cancer     meta-analysis    

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The defect-length effect in corrosion detection with magnetic method for bridge cables

Qiwei ZHANG, Rongya XIN

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 662-671 doi: 10.1007/s11709-018-0512-4

Abstract: An LMA defect in steel cables can be measured accurately when it is longer than a certain length.However, for defects in early stage, where the length of corrosion area is short, the MF examinationIn this study, the effect of defect length on the MF examination for corrosion detection of bridge cablesAn original analytical model to quantify the influence of defect length is proposed based on the equivalentresults show that the area loss caused by short corrosion damage will be underestimated if the defect-length

Keywords： bridge cable     corrosion detection     defect length     MF examination     quantitative evaluation    

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Optimization of aero-engine pipeline for avoiding vibration based on length adjustment of straight-line

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 11-11 doi: 10.1007/s11465-021-0667-x

Abstract: In this paper, a typical spatial pipeline is taken as the research object, the length of straight-lineThe relationship between straight-line segment length and parameters that determine the geometric characteristicsBased on the analysis of the influence of straight-line segment length on the vibration characteristicsdeveloped optimization method can obtain the optimal single value or interval of the straight-line segment lengthefficiency of the golden section algorithm is remarkably higher than that of the genetic algorithm for length

Keywords： length adjustment     spatial pipeline     aero-engine     vibration avoidance optimization     genetic algorithm    

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Mechanisms for simultaneous ozonation of sulfamethoxazole and natural organic matters in secondary effluent

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1368-0

Abstract:

• SMX was mainly degraded by hydrolysis, isoxazole oxidation and double-bond addition.

Keywords： Sulfamethoxazole     Ozonation     Natural organic matters     Secondary effluent     Degradation mechanism    

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Two-echelon Emergency Response Problem and Simulation Considering Secondary Disasters

Han-peng Zhang,Yi Liao,Hui-xia Luo

Frontiers of Engineering Management 2014, Volume 1, Issue 3,   Pages 318-321 doi: 10.15302/J-FEM-2014042

Abstract: is necessary for subsequent resource distribution planning that get expected relief time considering secondarythis research is to develop a two-echelon emergency resource distribution model under condition of secondary

Keywords： simulation     secondary disasters     two-echelon vehicle routing model    

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New form of geodetic coordinate system taking two length quantity as coordinate parameters

Yimin SHI, Ziyang ZHU, Yeming FAN

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1,   Pages 105-110 doi: 10.1007/s11709-009-0014-5

Abstract: The vertical and horizontal geodesic coordinates measured with length were defined as coordinate parametersThe formula for the latitudinal scale factor of length for geodetic parallel lines was derived, by which

Keywords： coordinate parameter     the first fundamental form on the ellipsoidal surface     latitudinal scale factor of length    

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PCDD/Fs emission, risk characterization, and reduction in China’s secondary copper production industry

Haiqian LI, Yonglong LU, Li LI

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 4,   Pages 589-597 doi: 10.1007/s11783-013-0495-2

Abstract: Secondary copper production is one of the key polychlorinated dibenzo- -dioxins and dibenzofurans (PCDDIn 2004, when the Stockholm Convention entered into force in China, PCDD/Fs emissions from secondaryIn this paper, PCDD/Fs emission dynamics from secondary copper industry were discussed and cumulativeRiver Delta, Pearl River Delta and central regions were among the top three of dioxin emissions from secondaryFrom 2009 to 2015, the PCDD/Fs emission dynamics in the secondary copper industry were presented through

Keywords： polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs)     secondary copper production    

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Physical and chemical processes of wintertime secondary nitrate aerosol formation

Qi YING

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 3,   Pages 348-361 doi: 10.1007/s11783-011-0343-1

Abstract: include a process analysis (PA) scheme for gas and particulate matter (PM) to study the formation of secondarySecondary nitrate is formed in the urban areas from near the ground to a few hundred meters above theThe secondary nitrate formation rate in rural areas is lower due to lower NO .reactions with water vapor and the N O heterogeneous reactions with particle-bound water are important for secondaryreactions are most import near the surface to a few hundred meters above surface with a maximum modeled net secondary

Keywords： secondary nitrate aerosol     N2O5 heterogeneous reaction     process analysis    

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Effects of different doses of cadmium on secondary metabolites and gene expression in Artemisia annua

Liangyun Zhou,Guang Yang,Haifeng Sun,Jinfu Tang,Jian Yang,Yizhan Wang,Thomas Avery Garran,Lanping Guo

Frontiers of Medicine 2017, Volume 11, Issue 1,   Pages 137-146 doi: 10.1007/s11684-016-0486-3

Abstract:

This study aims to elucidate the underlying molecular mechanisms of artemisinin accumulation induced by cadmium (Cd). The effects of different Cd concentrations (0, 20, 60, and 120 μmol/L) on the biosynthesis of Artemisia annua L. were examined. Intermediate and end products were quantified by HPLC-ESI-MS/MS analysis. The expression of key biosynthesis enzymes was also determined by qRT-PCR. The results showed that the application of treatment with 60 and 120 μmol/L Cd for 3 days significantly improved the biosynthesis of artemisinic acid, arteannuin B, and artemisinin. The concentrations of artemisinic acid, arteannuin B, and artemisinin in the 120 μmol/L Cd-treated group were 2.26, 102.08, and 33.63 times higher than those in the control group, respectively. The concentrations of arteannuin B and artemisinin in 60 μmol/L Cd-treated leaves were 61.10 and 26.40 times higher than those in the control group, respectively. The relative expression levels of HMGR, FPS, ADS, CYP71AV1, DBR2, ALDH1, and DXR were up-regulated in the 120 μmol/L Cd-treated group because of increased contents of artemisinic metabolites after 3 days of treatment. Hence, appropriate doses of Cd can increase the concentrations of artemisinic metabolites at a certain time point by up-regulating the relative expression levels of key enzyme genes involved in artemisinin biosynthesis.

Keywords： Cd     secondary metabolites     gene expressions     Artemisia annua L.    

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Title Author Date Type Operation

Secondary transfer length and residual prestress of fractured strand in post-tensioned concrete beams

Journal Article

Experimental study of primary and secondary side coupling natural convection heat transfer characteristics

Zhimin QIU, Daogang LU, Jingpin FU, Li FENG, Yuhao ZHANG

Journal Article

Research on analysis method of suspension bridge based on ANSYS

Xie Xuefeng and Luo Xiheng

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

Structural behavior of intermediate length cold-formed steel rack columns with C-stitches

M. ANBARASU, Mahmud ASHRAF

Journal Article

Modelling of dynamic contact length in rail grinding process

Shaodan ZHI,Jianyong LI,A. M. ZAREMBSKI

Journal Article

Association between telomere length and survival in cancer patients: a meta-analysis and review of literature

Xinsen Xu,Kai Qu,Qing Pang,Zhixin Wang,Yanyan Zhou,Chang Liu

Journal Article

The defect-length effect in corrosion detection with magnetic method for bridge cables

Qiwei ZHANG, Rongya XIN

Journal Article

Optimization of aero-engine pipeline for avoiding vibration based on length adjustment of straight-line

Journal Article

Mechanisms for simultaneous ozonation of sulfamethoxazole and natural organic matters in secondary effluent

Journal Article

Two-echelon Emergency Response Problem and Simulation Considering Secondary Disasters

Han-peng Zhang,Yi Liao,Hui-xia Luo

Journal Article

New form of geodetic coordinate system taking two length quantity as coordinate parameters

Yimin SHI, Ziyang ZHU, Yeming FAN

Journal Article

PCDD/Fs emission, risk characterization, and reduction in China’s secondary copper production industry

Haiqian LI, Yonglong LU, Li LI

Journal Article

Physical and chemical processes of wintertime secondary nitrate aerosol formation

Qi YING

Journal Article

Effects of different doses of cadmium on secondary metabolites and gene expression in Artemisia annua

Liangyun Zhou,Guang Yang,Haifeng Sun,Jinfu Tang,Jian Yang,Yizhan Wang,Thomas Avery Garran,Lanping Guo

Journal Article