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Online since: September 2011
Authors: Yong Liu, Ming Yang Zhang, Wei Zhang
Among these methods, EPM (Elemental Powder Metallurgy) processes provide technical as well as economical benefits over conventional metallurgical processes, due to cost reduction, improvement in performance and near net shaping [12].
The true stress-true strain under different strain rates at 1200℃, is used as input data for the simulation.
The deformation was 30% in reduction.
Online since: May 2011
Authors: Wen Cui Yang, Jie Yuan, Yong Ge, Bao Sheng Zhang, Xiao Ping Cai, Guo Hui Xia
The aim of this work is to provide experimental data on the mechanical properties of concretes subject to cryogenic temperature containing fly ash.
With temperature going down, the kinetic energy of the atoms reduces, which induces a reduction of the thermal agitation.
Because of the potential energy versus the inter atomic distance for a given material, the average equilibrium distance between atoms is reduced, and this reduction continues until the temperature reaches -273ºC at which point there is no agitation left[6].The attractive force between the atoms increases because of the decrease of the distance.
Online since: August 2013
Authors: Fei Geng, Tong Ning Wang, Qian Xu, Qi Wen Jin
And according to some survey data, many slopes were able to keep stable under static loads while under dynamic loads (such as seismic loads, blasting loads and vibration loads), theses slopes were subject to failure.
Jiang Tong studied the non-liner effects of rock joint slope under seismic loads, the results indicated that the failure of slopes caused by earthquake is non-liner [1]; Ye Hailin and Zheng Yingren studied and advanced a new evacuation methods about slope seismic stability [2]; adopting pseudo-static approach and strength reduction method, Fan Xi’an simulated distribution laws of displacement and stress in slope [3]; Zhang Daqi conducted seismic time history analysis on rock slope, and found unstable areas by strength reduction method [4]; Liang Yinchong and Nie Ying analyzed seismic stability of slope in high intensity filed by static method and pseudo-static method [5]; He Manchao and Wang Chenghu studied seismic stability of high slopes by sarma method, and the results indicated that seismic loads played predominate role in slope stability [6]; Yan Zhixin, Cai Hancheng and their mates studied deformation laws of rock slopes and soil ones under seismic loads [7]; Du Xiaoli and her mates
Online since: July 2019
Authors: Mu Wei Ji, Chang Xu Yan, Sheng Ding Chang, Jin Wang, Bo Li
KTaO3 and K2Ta2O6 ) are a group of stable photoelectric catalysts and have attracted research intertest in photon-induced CO2 reduction[1, 2] and water splitting[3-6].
A Xe lamp (Perfectlight, 300W) was used as the light source and an electrochemistry workstation (CHE660E) was used to collect data. 3.
Conclusions In summary, we prepared KTaO3/Au and K2Ta2O6/Au hetero-structure by flexible reduction of HAuCl4 on the surface of potassium tantalates.
Online since: January 2014
Authors: Bao Dong Wang, Yong Feng Xiao, Xiao Ting Liu, Li Jun Zhao, Geng Zhi Yu, Qi Sun, Xiao Huan Wang
Some of the proven benefits of the six sigma system are productivity improvement, customer satisfaction, defect reduction, cycle time reduction, and culture change, etc [11, 13].
The response surface methodology (RSM) has been implemented to optimize the collected experimental data.
Online since: October 2013
Authors: Jiao Yan Zhang, Jun Yan Wang, Hong Lan Bu, Wei He, Yan Zhang
And the power plunged from 2839W to 2594W, the reduction is 254W, it is about the amount of power provided by one section.
And the power plunged from 2522W to 2291W, the reduction is 231W, it is about the amount of power provided by one section.
Conclusion Based on the relevant historical data accumulated for a long time, the thesis elaborated the abnormal phenomenon of the power of certain GEO satellite solar array, and analyzes the cause of the abnormal phenomenon.
Online since: October 2010
Authors: Zhi Qi Liu, Xu Dong Li, Jian Li Song, Hui Ping Qi, Yong Tang Li
In the experiments, a computer data acquisition system was used, the torque of the spindle and the feeding force of the slider are transferred into electrical signals, treated and A/D transferred, then the real-time fore and energy parameters can be calculated and the characteristics of the force and energy variation can be obtained.
However, too small feeding speed will result in the creeping of the hydraulic cylinder and reduce the precision of the rolling process, as well as the reduction of the production efficiency.
Slower radial feeding speed and faster spindle rotating speed is better for the reduction of the deformation resistance and the improvement of the production efficiency.
Online since: October 2014
Authors: Nicoleta Rachieru, Daniel Constantin Anghel, Nadia Belu
Also, FMEA allows the prosperity of a company through its contribution to cost reduction in the phase of design and development of a particular product and through reduction of defects registered with the client in the subsequent exploitation. [2].
Some of the data can be seen in Table 1.
Online since: March 2015
Authors: Ji Feng Zhang, Lu Zhang, Bin Yang, Qi Chen, Cheng Kun Ma
It is important to consider thermal effects because these generally lead to a joint strength reduction, even though in some cases the opposite happens.
Thickness(mm) 0.10 0.11 0.12 0.13 0.14 0.15 C/SiC 2.3993 2.405 2.4114 2.4183 2.4257 2.4336 C/SiC and composite 5.8295 5.7357 5.6454 5.5582 5.474 5.3925 C/SiC and GH1035 20.65 20.433 20.201 19.973 19.749 19.53 C/SiC and SiC 7.2814 7.1164 6.9608 6.8136 6.674 6.5412 SiC and composite 4.6054 4.6111 4.618 4.6259 4.6346 4.6438 SiC and GH1035 16.369 16.238 16.11 15.988 15.869 15.755 SiC 4.7654 4.7462 4.2678 4.2611 4.7707 4.7815 Numerical data showed that the different adhesive thickness changed the load mode and the temperature flux which affects the distribution of residual thermal stress, and increasing the adhesive thickness results in subtle undulate in the stress distribution throughout the joint.
(3) It is important to consider thermal effects because these generally lead to a joint strength reduction, even though in some cases the opposite happens.
Online since: June 2014
Authors: Jia Ren Wang
Oxidation - reduction zone is the main interface of regional mineralization enrichment.
Ore body generally occurs in the oxidation-reduction transitional zone.
Carrying out 1:10000 soil geochemical survey of the density of exploration grid of 100m×40m, and analysis of 10 elements, the author delimits anomalous area after processing geochemical exploration data by GeoExplor software.
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