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Flexural behavior of ECC hollow beams incorporating different synthetic fibers
ABBAS, Farid H. ARNA ’OT, Sallal R. ABID, Mustafa ÖZAKÇA
《结构与土木工程前沿(英文)》 2021年 第15卷 第2期 页码 399-411 doi: 10.1007/s11709-021-0701-4
关键词: hollow beam hollowing ratio ECC flexural strength ductility toughness
《化学科学与工程前沿(英文)》 2022年 第16卷 第4期 页码 498-510 doi: 10.1007/s11705-021-2082-6
关键词: electrochemical reduction of CO2 syngas N-doped carbon nanotubes encapsulated alloy nanoparticles CO/H2 ratio
Ali ALAJMI, Hosny ABOU-ZIYAN, Hamad H. Al-MUTAIRI
《能源前沿(英文)》 2022年 第16卷 第4期 页码 629-650 doi: 10.1007/s11708-021-0799-z
关键词: parametric analysis high-performance window window-to-wall ratio (WWR) facade orientation solar shading cost analysis
《环境科学与工程前沿(英文)》 2022年 第16卷 第10期 doi: 10.1007/s11783-022-1570-3
● Collaborative treatment of plastics and OS was established to improve oil quality.
关键词: Oily sludge Pyrolysis Polyethylene H/Ceff ratio Oil quality
An investigation of reaction furnace temperatures and sulfur recovery
S. ASADI, M. PAKIZEH, M. POURAFSHARI CHENAR
《化学科学与工程前沿(英文)》 2011年 第5卷 第3期 页码 362-371 doi: 10.1007/s11705-011-1106-z
关键词: Claus unit concentration of H2S tail gas ratio sulfur recovery catalytic bed
齐茂林
《中国工程科学》 2001年 第3卷 第4期 页码 73-75
文章应用基础公式,推导液压系统油压极值比与极值比效率之间的关系式。该式说明,油压极值比越大,极值比效率就越低。提出了油压极值比是可以设计和选择的。
Controlling interstory drift ratio profiles via topology optimization strategies
《结构与土木工程前沿(英文)》 2023年 第17卷 第2期 页码 165-178 doi: 10.1007/s11709-022-0892-3
关键词: interstory drift ratio aggregation function bound formulation min–max problem topology optimization
A methodology of implementing target mixing ratio for asphalt mixture
Yucheng HUANG, Lun JI, Rui WEN, Ming ZHANG
《结构与土木工程前沿(英文)》 2017年 第11卷 第3期 页码 308-314 doi: 10.1007/s11709-017-0405-y
关键词: asphalt mixture target mixing ratio mix design implementation batching & mixing plant debugging
ZHANG Huilan, WANG Daowen
《医学前沿(英文)》 2008年 第2卷 第1期 页码 11-14 doi: 10.1007/s11684-008-0003-4
Lijing MENG, Licheng LIU, Xuehong ZI, Hongxing DAI, Hong HE, Zhen ZHAO, Xinping WANG,
《环境科学与工程前沿(英文)》 2010年 第4卷 第2期 页码 164-171 doi: 10.1007/s11783-010-0019-2
关键词: membrane reaction ceria-zirconia Ce/Zr molar ratio solid solution hydrogen temperature-programmed reduction (H2-TPR)
Nonlinear dynamic analysis for elastic robotic arms
H. KORAYEM, H. N. RAHIMI
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 219-228 doi: 10.1007/s11465-011-0218-y
The aim of the paper is to analyze the nonlinear dynamics of robotic arms with elastic links and joints. The main contribution of the paper is the comparative assessment of assumed modes and finite element methods as more convenient approaches for computing the nonlinear dynamic of robotic systems. Numerical simulations comprising both methods are carried out and results are discussed. Hence, advantages and disadvantages of each method are illustrated. Then, adding the joint flexibility to the system is dealt with and the obtained model is demonstrated. Finally, a brief description of the optimal motion generation is presented and the simulation is carried out to investigate the role of robot dynamic modeling in the control of robots.
关键词: robotic arms elastic link elastic joint nonlinear dynamics optimal control
《环境科学与工程前沿(英文)》 2022年 第16卷 第8期 doi: 10.1007/s11783-022-1522-y
• Simultaneous C & N removal in Methammox occurs at wide C:N ratio.
关键词: Methanogens Biological Nitrogen Removal (BNR) Simultaneous Methammox C:N ratio
Zhigen WU, Guohua LIU, Zihua ZHANG
《结构与土木工程前沿(英文)》 2011年 第5卷 第1期 页码 112-120 doi: 10.1007/s11709-010-0069-3
关键词: damage assessment decay ratio of acceleration signals (DRAS) wavelet transform (WT) modal analysis reinforced concrete beam beat phenomenon
Jiao Feng, Qiuhao Lu, Weimin Tan, Kequan Chen, Pingkai Ouyang
《化学科学与工程前沿(英文)》 2019年 第13卷 第1期 页码 80-89 doi: 10.1007/s11705-018-1763-2
1,5-Pentamethylene diisocyanate, a novel aliphatic diisocyanate formed from bio-based 1,5-pentamethylenediamine, has been used as a hard segmented material to synthesize polyurethane. In this study, several waterborne polyurethane (WPU) dispersions have been successfully prepared by a prepolymer process from 1,5-pentamethylene diisocyanate poly(polyether) with different NCO/OH ratios and 1,6-hexanediol (HDO)/dimethylol propionic acid (DMPA) molar ratios. The Fourier transform infrared (FTIR) spectra, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction, and a mechanical tensile test were used to investigate the structures, thermal stability, phase separation, crystallinity, mechanical properties, and adhesive performance of the WPU dispersions. The FTIR results indicate that the degree of hydrogen bonding and the numbers of urea groups increase as the NCO/OH ratio and HDO/DMPA molar ratio increase. Furthermore, the phase separation increases and the thermal stability decreases as the NCO/OH ratio increases or the HDO/DMPA molar ratio decreases. Finally, WPU3.0-2.4 (NCO/OH=3, HDO/DMPA=2.4) exhibits a maximum tensile strength and shear strength, pointing to its possible use as an adhesive. These results could provide a very valuable reference for industrial applications of WPU.
关键词: 1 5-pentamethylene diisocyanate polyurethane water based
堆积床相变储热系统中径向孔隙率振荡分布对热性能的影响 Article
刘红兵, 赵长颖
《工程(英文)》 2021年 第7卷 第4期 页码 515-525 doi: 10.1016/j.eng.2020.05.020
由于具有较高的储热能力和传热速率,堆积床相变储热被认为是一种很有潜力的储热方法。在堆积床中,壁面效应会影响相变胶囊的填充结构,从而引起径向孔隙率的振荡。本研究建立了一个基于球体实际堆积过程的三维堆积床相变储热模型,以描述径向孔隙率的振荡分布,并分析了其内部的流动和传热情况。通过在堆积床中沿径向不同位置截取圆柱面,揭示了相变胶囊的排列与径向孔隙率之间的对应关系。径向孔隙率的振荡分布导致换热流体速度呈不均匀分布,因此相变材料的径向温度分布和液相分数分布进一步受到影响。此外,本文讨论了不同的无量纲参数(如管与胶囊的直径比、雷诺数和史蒂芬数)对换热流体和相变材料径向特性的影响。结果表明,不同的直径比对应于不同的径向孔隙率分布。此外,随着直径比的增加,在壁面附近区域换热流体速度显著变化,而中心区域换热流体速度的不均匀性将减小。雷诺数和史蒂芬数对换热流体的相对速度分布有轻微影响,而更高的雷诺数可导致速度成比例地提高,史蒂芬数的增加可加快堆积床相变储热系统的储热过程。
标题 作者 时间 类型 操作
Flexural behavior of ECC hollow beams incorporating different synthetic fibers
ABBAS, Farid H. ARNA ’OT, Sallal R. ABID, Mustafa ÖZAKÇA
期刊论文
encapsulating M(Co, Fe)-Ni alloy for electrochemical production of syngas with potential-independent CO/H
期刊论文
Reassessment of fenestration characteristics for residential buildings in hot climates: energy and economic analysis
Ali ALAJMI, Hosny ABOU-ZIYAN, Hamad H. Al-MUTAIRI
期刊论文
Co-pyrolysis of oil sludge with hydrogen-rich plastics in a vertical stirring reactor: Kinetic analysis, emissions, and products
期刊论文
An investigation of reaction furnace temperatures and sulfur recovery
S. ASADI, M. PAKIZEH, M. POURAFSHARI CHENAR
期刊论文
A methodology of implementing target mixing ratio for asphalt mixture
Yucheng HUANG, Lun JI, Rui WEN, Ming ZHANG
期刊论文
Diagnostic evaluation of plasma aldosterone concentration to plasma renin activity ratio in primary aldosteronism
ZHANG Huilan, WANG Daowen
期刊论文
Preparation of ceria-zirconia solid solution with enhanced oxygen storage capacity and redox performance
Lijing MENG, Licheng LIU, Xuehong ZI, Hongxing DAI, Hong HE, Zhen ZHAO, Xinping WANG,
期刊论文
Enhancing the efficiency of nitrogen removing bacterial population to a wide range of C:N ratio (1.5:
期刊论文
Experimental study of structural damage identification based on modal parameters and decay ratio of acceleration
Zhigen WU, Guohua LIU, Zihua ZHANG
期刊论文
The influence of the NCO/OH ratio and the 1,6-hexanediol/dimethylol propionic acid molar ratio on the
Jiao Feng, Qiuhao Lu, Weimin Tan, Kequan Chen, Pingkai Ouyang
期刊论文