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Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell
Tian TIAN, Jianjun TANG, Wei GUO, Mu PAN
《能源前沿(英文)》 2017年 第11卷 第3期 页码 326-333 doi: 10.1007/s11708-017-0489-z
关键词: polymer electrolyte membrane fuel cell accelerated life-time test load cycling test durability
Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata
《结构与土木工程前沿(英文)》 2023年 第17卷 第4期 页码 533-545 doi: 10.1007/s11709-023-0946-1
关键词: shield tunneling disc cutter load laboratory excavation test numerical calculation soft–hard varied strata
Diego Maria BARBIERI, Inge HOFF, Chun-Hsing HO
《结构与土木工程前沿(英文)》 2021年 第15卷 第2期 页码 412-424 doi: 10.1007/s11709-021-0700-5
关键词: organosilane lignosulfonate crushed rocks pavement unbound layers repeated load triaxial test finite element analysis
《结构与土木工程前沿(英文)》 页码 1341-1356 doi: 10.1007/s11709-023-0988-4
关键词: steel fiber reinforced concrete freeze–thaw cycling Brazilian disc splitting test acoustic emission technique dynamic splitting tensile acoustic emission properties
MANURE AND METROPOLES---A GLOBAL FRAMEWORK FOR NUTRIENT CYCLING IN FOOD SYSTEMS
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期
李仲,张航,古源,南勇,陈立宏
《中国工程科学》 2012年 第14卷 第1期 页码 86-89
DX桩是近年兴起的新型变截面桩型,其独有的承力盘很好地改善了沉降问题。通过室内小比尺模型试验,得出DX桩承载力及沉降特性的相关规律,为DX桩承载机理的研究提供进一步的试验支持。试验主要采用应变片测量桩身受力情况,桩顶设置百分表测量沉降情况,加载装置采用砝码以及杠杆分级加载。试验主要为与直孔桩对比试验以及DX桩平行试验。试验结果证明DX桩在承载力和沉降方面都优于直孔桩;上盘承载力大于下盘,随桩顶荷载增大,下盘承载所占比重有所提高。
Tanvi SINGH, Mahesh PAL, V. K. ARORA
《结构与土木工程前沿(英文)》 2019年 第13卷 第3期 页码 674-685 doi: 10.1007/s11709-018-0505-3
关键词: batter piles oblique load test neural network M5 model tree random forest regression ANOVA
《农业科学与工程前沿(英文)》 2022年 第9卷 第3期 页码 407-424 doi: 10.15302/J-FASE-2022448
● Soil nitrogen fluxes and influencing factors were reviewed in the subtropical hilly regions.
关键词: nitrogen cycling soil nitrogen nitrogen deposition greenhouse gases emission non-point source pollution nitrogen use efficiency
刘春刚,柴小兵,欧阳义,贺德新
《中国工程科学》 2012年 第14卷 第1期 页码 80-85
对DX桩进行了现场竖向抗压静载试验,并与后压浆直孔灌注桩进行了比较。结果表明,DX桩和后压浆钻孔灌注桩都可以提高桩的承载力和控制桩的沉降,4根试验桩的试验效果相差不大,但DX桩能以桩径小、桩长短满足大承载力的桩基,达到极限承载力时,混凝土的单方承载力是后压浆钻孔灌注桩的1.5倍,可以减少工程材料,降低工程造价;且DX桩施工工艺更简单,能加快施工进度。
Distributed fiber optic monitoring of a CFA pile with a central reinforcement bar bundle
Yi RUI, Nicholas de BATTISTA, Cedric KECHAVARZI, Xiaomin XU, Mei YIN
《结构与土木工程前沿(英文)》 2021年 第15卷 第1期 页码 167-176 doi: 10.1007/s11709-020-0581-z
关键词: continuous flight auger pile static load test central reinforcement bar bundle distributed fiber optic sensor finite element load transfer
《结构与土木工程前沿(英文)》 2023年 第17卷 第2期 页码 224-237 doi: 10.1007/s11709-022-0914-1
关键词: single batter pile skew horizontal load model test finite-element analysis empirical design method
Elastic modulus and thermal stress in coating during heat cycling with different substrate shapes
Daniel GAONA,Alfredo VALAREZO
《机械工程前沿(英文)》 2015年 第10卷 第3期 页码 294-300 doi: 10.1007/s11465-015-0351-0
The elastic modulus of a deposit (Ed) can be obtained by monitoring the temperature (?T) and curvature (?k) of a one-side coated long plate, namely, a one-dimensional (1D) deformation model. The aim of this research is to design an experimental setup that proves whether a 1D deformation model can be scaled for complex geometries. The setup includes a laser displacement sensor mounted on a robotic arm capable of scanning a specimen surface and measuring its deformation. The reproducibility of the results is verified by comparing the present results with Stony Brook University Laboratory’s results. The ?k-?T slope error is less than 8%, and the Ed estimation error is close to 2%. These values reveal the repeatability of the experiments. Several samples fabricated with aluminum as the substrate and 100MXC nanowire (Fe and Cr alloy) as the deposit are analyzed and compared with those in finite element (FE) simulations. The linear elastic behavior of 1D (flat long plate) and 2D (squared plate) specimens during heating/cooling cycles is demonstrated by the high linearity of all ?k-?T curves (over 97%). The Ed values are approximately equal for 1D and 2D analyses, with a median of 96 GPa and standard deviation of 2 GPa. The correspondence between the experimental and simulated results for the 1D and 2D specimens reveals that deformation and thermal stress in coated specimens can be predicted regardless of specimen geometry through FE modeling and by using the experimental value of Ed. An example of a turbine-blade-shaped substrate is presented to validate the approach.
关键词: in-plane Young’s modulus curvature temperature thermal stress coating
MANURE AND METROPOLES—A GLOBAL FRAMEWORK FOR NUTRIENT CYCLING IN FOOD SYSTEMS
Daan VERSTAND, Theun VELLINGA, Krijn POPPE, Pieter de WOLF
《农业科学与工程前沿(英文)》 2021年 第8卷 第1期 页码 182-187 doi: 10.15302/J-FASE-2020364
《化学科学与工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11705-023-2376-y
关键词: biomass-derived carbon MnO2 lithium-ion batteries anode material high reversible capacity
Experimental study of wind loads on gable roofs of low-rise buildings with overhangs
Peng HUANG, Ling TAO, Ming GU, Yong QUAN
《结构与土木工程前沿(英文)》 2018年 第12卷 第3期 页码 300-317 doi: 10.1007/s11709-018-0449-7
Gable roofs with overhangs (eaves) are the common constructions of low-rise buildings on the southeastern coast of China, and they were vulnerable to typhoons from experience. The wind pressure distributions on gable roofs of low-rise buildings are investigated by a series of wind tunnel tests which consist of 99 test cases with various roof pitches, height-depth ratios and width-depth ratios. The block pressure coefficients and worst negative (block) pressure coefficients on different roof regions of low-rise buildings are proposed for the main structure and building envelope, respectively. The effects of roof pitch, height-depth ratio, and width-depth ratio on the pressure coefficients of each region are analyzed in detail. In addition, the pressure coefficients on the roofs for the main structure and building envelope are fitted according to roof pitch, height-depth ratio and width-depth ratio of the low-rise building. Meanwhile, the rationality of the fitting formulas is verified by comparing the fitting results with the codes of different countries. Lastly, the block pressure coefficients and worst negative pressure coefficients are recommended to guide the design of low-rise buildings in typhoon area and act as references for the future’s modification of wind load codes.
关键词: low-rise building gable roof wind loads wind tunnel test block pressure coefficient load code
标题 作者 时间 类型 操作
Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell
Tian TIAN, Jianjun TANG, Wei GUO, Mu PAN
期刊论文
Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata
期刊论文
Crushed rocks stabilized with organosilane and lignosulfonate in pavement unbound layers: Repeated load
Diego Maria BARBIERI, Inge HOFF, Chun-Hsing HO
期刊论文
evaluation of the dynamic splitting tensile properties of steel fiber reinforced concrete under freeze–thaw cycling
期刊论文
Modeling oblique load carrying capacity of batter pile groups using neural network, random forest regression
Tanvi SINGH, Mahesh PAL, V. K. ARORA
期刊论文
SOIL NITROGEN CYCLING AND ENVIRONMENTAL IMPACTS IN THE SUBTROPICAL HILLY REGION OF CHINA: EVIDENCE FROM
期刊论文
Distributed fiber optic monitoring of a CFA pile with a central reinforcement bar bundle
Yi RUI, Nicholas de BATTISTA, Cedric KECHAVARZI, Xiaomin XU, Mei YIN
期刊论文
Numerical analysis of bearing behaviors of single batter piles under horizontal loads in various directions
期刊论文
Elastic modulus and thermal stress in coating during heat cycling with different substrate shapes
Daniel GAONA,Alfredo VALAREZO
期刊论文
MANURE AND METROPOLES—A GLOBAL FRAMEWORK FOR NUTRIENT CYCLING IN FOOD SYSTEMS
Daan VERSTAND, Theun VELLINGA, Krijn POPPE, Pieter de WOLF
期刊论文
biomass-derived carbon loaded with MnO as lithium-ion battery anode for improving its reversible capacity and cycling
期刊论文