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Online since: February 2015
Authors: Victor Sachkov, Alexander S. Bujnovskij, Vladimir L. Sofronov, Alexandra V. Anufrieva
The results of mathematical treatment of experimental data of fluorination of oxides of neodymium and iron have shown that the minimal error under linearization is given by the equation of the contractive surface.
This results in more complete reduction of fluorides, especially that of oxides, as well as better elimination of reduction smelting products.
The occurrence of moisture and volatile impurities (HF, F2, CO2) in iron and REM fluorides in the lining materials results in reduction of metal fall into ingots, quality loss and abrupt increase of pressure in the reactor during the process of reduction smelting.
If the content of the impurities mentioned is greater than 0.15%, fluorides can’t be used for reduction.
Investigation of the stage of magnet production One part of the ingots of reduction smelting alloys was used to produce magnet samples.
Online since: September 2014
Authors: Els Kesters, Antoine Pacco, Ihsan Simms, Jelle Vandereyken, Hiroki Yonekawa, Kathleen Nafus
Focus spot reduction by brush scrubber cleaning Antoine Pacco1, a, Els Kesters1, Ihsan Simms2, Kathleen Nafus2, Jelle Vandereyken1, Hiroki Yonekawa2 1 imec, Kapeldreef 75, B-3001 Leuven, Belgium 2 Tokyo Electron Limited, 1-1 Fukuhara, Koshi City, Kumamoto Japan 861-1116 aantoine.pacco@imec.be Keywords: Scrubber, Brush, Backside Cleaning, Backside Contamination, Focus Spots, Chuck Spots, Hot Spots, Overlay, Immersion, EUV Introduction As immersion lithography extends into the 22nm node and beyond through the use of multiple and other advanced patterning techniques, the requirements for overlay, CDU and focus deviation reduction also become tighter [1].
In this study that was performed at imec’s 300mm cleanroom facility, the study objective was to evaluate the focus spot reduction performance of a stand-alone scrubber in a case study featuring known focus spot generating equipment sets. .
This backside contaminated test material was used in our cleaning experiments and evaluation of focus spot reduction by performing leveling tests on an immersion scanner that was able to measure out of plane deviations.
The standard sensitivity of the measurement for the out of plane deviation on the scanner was 50nm but some data was obtained with a sensitivity till 30nm.
A reduction of focus spots is visible after application of the PVA brush.
Online since: August 2013
Authors: Yu Qin Zhu
Experimental Study on Unsupported Nano-MoS2 Catalyst for Deep Desulfurization Fuel Oil Yuqin ZHU School of Chemistry & Chemical Engineering, Xian Shiyou University, Xian, China zhuyq@xsyu.edu.cn Keywords: Unsupported MoS2 Catalyst; Hydrotreating Desulfurization; Hydrothermal Reduction.
Five kinds of unsupported MoS2 hydrodesulfurization catalysts and the precursor of MoS2 catalyst, nano-sized MoO3, were synthesized by a novel hydrothermal reduction method.
Experimental materials and preparation methods Experimental materials By analysis and comparison,the hydrothermal reduction is used to prepare MoO3, the precursor of MoS2 catalyst, and the MoS2 catalyst is synthesized by the hydrothermal deoxidization.
Preparation methods Hydrothermal reduction for the preparation of MoO3 The mixture of sodium molybdate and hydrochloric acid in certain proportion was put into the inner of a reactor and it was heated from the ambient temperature to 150℃ at an appropriate speed.
Handbook of thermochemical data for compounds & aqueous species.
Online since: March 2010
Authors: Guo Zheng Quan, Jie Zhou, Ying Tong, Yan Wei Zhang
A Kumar-type constitutive relationship of TA15 alloy was investigated by non-linear regression analysis, and the equations were established based on test data from hot process simulator.
According to test result data a Kumar type constitutive relationship of TA15 alloy was investigated by non-linear regression analysis.
Using Q, n and α data, the A value is obtained from Eqs.(1) and (2) as an average at different  and σ.
The height reduction curve waved along forging time, the height reduction reached a trough at the beginning or the end of every hammering period.
Conclusions A Kumar type constitutive relationship of TA15 alloy has been studied by the non-linear regression analysis of test data from hot process simulator.
Online since: July 2013
Authors: Yu Long Zhang, Yin Shan Wang, Ze Xu Wu
Research of super capacitance in automobile industry Yu long Zhang a, Yin Shan Wang b, Ze Xu Wu c Tianjin University of Technology and Education Automotive and Transportation Tianjin 300222 azyl41132519830@163.com, byinsanwang@yahoo.cn, cwuzexu2007@126.com Keywords: super capacitor; Vehicle power supply; Energy recycling; Hybrid mode; Energy conservation and emission reduction Abstract: this article introduces the current car which is in circumstance of regulations more and more strict and energy increasingly tense, super capacitor car have the significance of realizing energy conservation and emissions reduction.
Focus on the analysis of the super capacitor car in different conditions, energy flow and power distribution process in the hybrid model, which provides theoretical basis for super capacitance car realizing to energy conservation and emissions reduction.
Also in 2009, from skin YouCi trust foundation data of clean energy investment, China is leading the world more than us $18.6 billion to $34.6 billion.
The three way dynamic collaborative orderly job and satisfy car complicated condition needs , achieving energy saving and emission reduction.
Conclusion This article mentioned the severe requirements of car from the energy and the regulations for energy conservation and emissions reduction, countries increase the capital investment in the development of new energy vehicles, This suggests that car with energy conservation and emission reduction have broad prospects.
Online since: September 2014
Authors: D.O. Pustovoytov, Alexander Pesin
However the systematic data on the influence of the process parameters (e.g., ratio of rolls velocity mismatch, reduction per pass, friction and diameter of rolls), and the shear strain rate required to achieve a significant grain refinement in asymmetric rolling are lacking.
However the works and projects known to the authors of this paper lack the integrated data on influence of asymmetric rolling parameters (e.g., mismatch ratio of the roll velocities, reduction per pass, friction and diameter of rolls) on the shear strain values and their distribution through the sheet thickness.
Pure aluminum DIN-Al-99.7 from DEFORM-2D data base was chosen as a material for simulation.
The initial data varied within the following ranges: 1) friction coefficient on the contact with the top and bottom rolls μ = 0.08…0.32; 2) work roll radius R = 50…200 mm; 3) mismatch factor of roll velocities Kv = 1.00…3.33 (Eq. 8); 4) reduction per pass ε = 30…70%.
Influence of reduction per pass Very high values of the shear strain can be achieved by means of combination of significant reduction (ε ≥ 50%) and velocities mismatch with (Kv ≥ 2.00).
Online since: March 2013
Authors: Wen Hui Ma, Yang Zhou, Xiu Hua Chen, Shao Yuan Li, Ming Yu Ma, Yao Hui Xu, Yong Yin Xiao
However, the pores were gradually visible with the HF concentration reduction.
The data of surface roughness and the main height distribution of the “hill” both showed an increase with the reduction of concentration, from 6.39 nm increase to 16.9 nm and from 30 nm increase to 90 nm, respectively, which implied that the pores were better exposed under the lower HF concentration.
From the Fig2B to 2C, we can find that massive “hill” is visible on the surface of PS, and the height increases with the reduction of HF concentration.
With the concentration reduction, the pores were gradually visible.
The data of surface roughness and the height distribution density of the “hill” both showed increases with the reduction of HF concentration.
Online since: July 2011
Authors: Zhao Cai Wang, Zheng Gen Liu, Shi Qiang Chen, Jue Tang, Xiang Xin Xue, Man Sheng Chu
In addition, oxidized pellets are also dominant burden for pre-reduction shaft furnace of COREX process and direct reduction shaft furnace of HYL and MIDREX process.
Finally, more emphasis are put on studying the effects of B-Mg additive on reduction swelling and the strength after reduction and cooling of the above pellets and making the detailed mechanism analysis.
Table 2 lists out the experiment datas of green balls properties under adding the different amount of B-Mg additive.
Fig. 4 shows the effects of adding B-Mg additive on reduction swelling index (RSI) and the strength of pellets (roasted under 1220 ˚C) after reduction and cooling.
On the other hand, after adding B-Mg additive, the increasing of binding phase amount benefits to overcome the phase-change stress during the reduction, which further decreases the reduction swelling [6].
Online since: July 2013
Authors: Yu Ke Chen, Tai Xiang Zhao
Data collection for medical data warehouse research Yuke Chen1,a , Taixiang Zhao1,b 1Department of foundation, First Aeronautic Institute of the Air Force ,Xinyang, China ayuke_chen@sohu.com, bZtx304@126.com Keywords: Data warehouse, Heterogeneous sources, Project management Abstract.We propose an easy method for data collection and central data warehouse design.
Basically, our data gathering and data organization was repeated three times, each time trying to avoid previous mistakes.
Finally, we advise that for data gathering in general, one should identify the critical requirements first.Typical requirements are high levels of data privacy, data accuracy, analysis speed, ability to filter large amounts of data, good connectedness, short-term data availability, etc.
This will reduce the scope of the data gathered and will simplify the schemas of the data repository.
In our case, the scope reduction was also a consequence of the analysis tools that have been already developed.
Online since: December 2024
Authors: Tran Thi Thu Hien, Nguyen Sy Long
Among all those methods, reduction remains the primary method for iron recovery from BFD.
Results and Discussion Analysis of the XRD data in Figure 1 observes a significant change in the phase structure of the sample with 30% BFD (30:70) during the reduction.
After reduction at 1000 °C (as signed 30:70 RD 1000 ºC), the intensity of the Fe₃O₄ and FeO peaks decreases, indicating the reduction of iron oxides, while a peak for metallic iron (Fe) appears.
XRD data in Figure 2 for four samples with different BFD:fine ore ratios (0:100, 10:90, 20:80, and 30:70) show a gradual reduction of iron oxides as the BFD ratio increases.
XRD data in Figure 3, analyzing samples with different BFD:fine ore ratios (0:100, 10:90, 20:80, and 30:70) reduced at 1100ºC, show a clear change in the phase structure.
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