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Online since: August 2013
Authors: Shi Lin Tan, Xin Bang Ding, Xue Qin Jiang
Compared to the method of traditional mix proportion design — the simple equivalent replacement method, the method of dense aggregate packing makes the concrete structure more compact and the dosage of cement have a significant reduction.
Under the same water-binder ratio, as the FSR increases, the strength at each age has different degrees of reduction, which possibly because the activity of flyash is lower and its contribution to concrete strength is mostly from its tiny aggregate effect.
Data sheet of chloride ion penetration resistance No. electric flux(C) grade of penetration resistance 28d 56d C-12 532 286 Q-V C-11 470 248 Q-V C-21 372 205 Q-V D-12 459 236 Q-V D-11 336 175 Q-V D-21 258 171 Q-V The chloride ion penetration resistance of concrete is an important indicator to measure the durability of concrete.
Online since: May 2020
Authors: Hoc Thang Nguyen, Thi Hong Thuy Le, Van Khoi Nguyen, Thi Luong Nguyen, Thanh Tung Nguyen
It is known that the seeds are cheap and available byproduct sources, reduction of emission causing environmental pollution.
The experimental data show that the effects of concentrations of HCl acid on the hydrolysised jackfruit seed starches.
It broke the chain of starch molecules and lead to a reduction of starch molecular weight.
Online since: June 2021
Authors: Gu Fan Zhao, Rui Yao Wang
With transdisciplinary application and integration, international oil companies and service companies actively draw on cutting-edge technologies like nanotechnology, functional materials, big data, and artificial intelligence to effectively promote the development of petroleum engineering development.
The new composite material is expected to be used in the underground special tools, underground antenna and other special components instead of steel, to achieve weight reduction, corrosion resistance, improve signal strength and other functions.
Adjustable working frequency (70MHz-7GHz); not easy to break, more durable (stretched 2.2 times); flexible design, reconfigurable; system weight reduction and miniaturization.
Online since: February 2011
Authors: Koji Kita, Atsushi Eika, Tomonori Nishimura, Kosuke Nagashio, Akira Toriumi
Thus partial reduction/oxidation, assisted with local Joule heating [2], will be responsible for the connection/disconnection of the conductive path with the application of electric biases.
The same trend was also observed by the XRD patterns of the films deposited on Pt layers (data not shown).
On the other hand if we assume that the electron injections from cathode would be enhanced by inserting a poorly-crystallized layer, then it is reasonable to consider that the injection will initiate the conductive path formation, since the reduction of oxides induces oxygen deficient type defects in the film, which might be responsible for the conductive path formation, as demonstrated clearly for TiOx stacks [7, 13].
Online since: July 2017
Authors: Klaus Drechsler, Christian Oblinger, André Baeten
Particularly, drive shafts comprising a CFRP structure commonly provide weight reductions of up to 50 percent compared to conventional steel shafts due to their high specific strength and stiffness [12, 13].
Moreover, the reduction of the section with a small diameter in combination with a fiber angle of ± 45° with respect to the axial direction is effective.
The material data of the epoxy-based prepreg SGL CE 8201-200-45S woven (twill 2/2) was ply-wise implemented into the finite element software.
Online since: March 2007
Authors: Claudio Guarnaschelli, P. Folgarait, E. Paravicini Bagliani, R. Demarchi, H. Desimone
Usually, the reduction of area (ROA) and toughness decrease when FV,M increases.
This reduction of ROA is gradual in the range 15% < FV,M < 80% when low-C martensite islands are predominant, whereas ductility approaches quickly very low values for FV,M < 15%, when high-C poordeformable martensite is present (CM>0.4%).
Also experimental data from laboratory tests are shown.
Online since: January 2013
Authors: Hua Wang, Yong Gang Wei, Kong Zhai Li, Xing Zhu, Ya Ne Zheng
Reaction characteristics of Ce-based oxygen carrier for two-step production syngas and hydrogen through methane conversion and water splitting Yonggang Wei1,a, Xing Zhu1,b, Kongzhai Li1,c, Yane Zheng1,d, Hua Wang1,e 1Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction Ministry of Education, Kunming University of Science and Technology, Kunming 650093, PR China; Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China aemail:weiygcp@yahoo.com.cn, bemail:zhuxing2010@hotmail.com,cemail:lkz_514@yahoo.com.cn, demail:zhengyane87@yeah.net, eemail:wanghuaheat@hotmail.com Keywords: Syngas; Hydrogen; Methane conversion; Water splitting; Ce-based oxygen carrier; Abstract: The two-step steam methane reforming for production syngas and hydrogen was investigated by using Ce-based oxygen carriers (CeO2, CeO2-ZrO2,CeO2-Fe2O3) which were prepared by co-precipitation method and characterized by means of
Data was collected between 2θ = 10°−80°;The Raman spectrum of oxygen carriers were recorded in a Renishaw Invia Raman imaging microscope.
CH4-TPR and CH4-IR Methane temperature-programmed reduction (CH4-TPR) was performed on a fixed-bed reactor under a flow of 5% CH4/N2 (200 cm3/min) over 1.8 g sample using a heating rate of 10 °C/min.
Online since: September 2011
Authors: Ning Wang, Su Duo Xue, Xiong Yan Li
It is shown that the effect is obviously, the ratio of ultimate loads of structures with rigid joints and pinned joint is from 2 to 3, and with the reduction in joint stiffness, the probability of structure instability gets higher [7].
Reductions in collapse loads due to semi-rigid of the connections, as well as to the initial geometric imperfections of nodal coordinates and member crookedness, are investigated.
The mechanical property of this joint model is proved to be reliable by comparing the data from experiments and finite element analysis [18,19].
Online since: October 2010
Authors: Hai Jiang Wu, Fei Ying Yang
The acquired measurement data were analyzed by using the software packages of CHI750A.
Therefore the Cer+sil film obtained by the two-step pre-treating provided the strongest reduction of current density.
In anodic area, zinc has a high solubility and dissolves with formation of Zn 2+ ions, while the local pH increase at the zinc surface proximity leads to cerium hydroxide and zinc hydroxide precipitation on the zinc surface due to the oxygen reduction reaction in cathodic area.
Online since: August 2020
Authors: Nirun Witit-Anun, Adisorn Buranawong
The crystallinity enhancement which observed from X-ray intensity increased was came from the aggregation deposited atom resulting more order atom arrangement and the reduction of the defect during the annealing temperatures. [12] The crystal sizes of all samples were evaluated from the XRD peaks using the Scherrer formula were found in table 2.
An almost reduction in the chromium from 20.65 to 2.68 (at.%) and a complete addition of oxygen (58.64 at.%) contents in the films at 700 °C, a significant decrease in Ti and N from 43.26 to 22.75 (at.%) and 51.19 to 15.94 (at.%), respectively, were also detected.
This experiment data are in good agreement with previous literature [16].
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