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Online since: November 2003
Authors: Sang Ho Lee, Jeong Whan Han, Mok Soon Kim, Dong-su Jung, Byung Don You
It was revealed that the sagging resistance of the clad sheets is governed by both the homogenizing temperature of core alloy and the reduction rate of final cold rolling.
The cast filler alloys were homogenized at 773K for 1h and then hot rolled to the thickness of 2mm with a reduction rate of 90%.
Almost all of the dispersoids correspond to Al-Mn-Si based intermetallics according to the EDS analysis data.
(a) (b) (c) (d) 1µµµµm (a) (b) (c) (d) 1µµµµm1µµµµm Fig. 3 TEM micrographs of core alloy homogenized at (a) 723K, (b) 773K, (c) 823K and (d) 873K. 4 Title of Publication (to be inserted by the publisher) 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 Final reduction rate (%) (a) Homegenized at 723K Sagging distance (mm) 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 Final reduction rate (%) Sagging distance (mm) (b) Homogenized at 773K 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 (c) Homogenized at 823K Sagging distance (mm) Final reduction rate (%) 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 Sagging distance (mm) (d) Homogenized at 873K Final reduction rate (%) 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 Final reduction rate (%) (a) Homegenized at 723K (a) Homegenized at 723K Sagging distance (mm) 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 Final reduction rate (%) Sagging distance
(mm) (b) Homogenized at 773K (b) Homogenized at 773K 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 (c) Homogenized at 823K (c) Homogenized at 823K Sagging distance (mm) Final reduction rate (%) 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 Sagging distance (mm) (d) Homogenized at 873K (d) Homogenized at 873K Final reduction rate (%) Fig. 4 Sagging test results of the clad specimens.
Online since: August 2017
Authors: Sophie Thallner, Christine Hemmelmair, Silvia Martinek, Wolfgang Schnitzhofer
The degree of P removal could not be easily determined due to imbalanced data obtained.
A. ferrooxidans can thrive by coupling the oxidation of elemental sulfur to dissimilatory reduction of ferric iron.
The data for acid consumption, redox potential and temperature of the system were recorded daily.
The data for acid consumption, referred to as g acid consumed per g slag inserted are summarized in Table 3.
The redox potentials varied between 300 and 435 mV during 24 days of operation (data not shown).
Online since: May 2011
Authors: Guo Hong Huang, Guo Rong Duan, Xin Wang, Ying Gong
The most distinguishing characteristic of TPC was its reaction character at normal temperatures (30℃), which was of great practical significance for energy conservation and pollution reduction.
The most distinguishing characteristic of TPC is its reaction character at normal temperatures (30℃), which is of great practical significance for energy conservation and pollution reduction.
Admixtures Performance of concrete (cm) Admixtures Dosage Slump Fluidity 1 TPC 0.150% 20.0 41×39 2 HW 0.150% 11.8 - 3 HW×1.2 0.180% 21.7 43×45 4 HW×1.1 0.165% 19.5 38×40 Data of the experiment on water-reducing ratio of TPC are in Table 1.
The most distinguishing characteristic of TPC is its reaction character at normal temperatures (30℃), which is of great practical significance for energy conservation and pollution reduction.
For relevant experiment data, see Table 2.
Online since: March 2018
Authors: Chang Seon Shon, Eldar Sharafutdinov, Arman Abdigaliyev, Almas Sheriye, Dichuan Zhang
The combination of 5% SF and 20% GGBFS was found to be useful for strength development and reduction of porosity in the AC.
Although several researchers investigated the partial replacement of fly ash [3] and bottom ash [4] instead of quartz rich sand or lime in AC production, unfortunately, up-to-date there are insufficient data available which discuss and examine propertiesof the AC when GGBFS and SF used together.
For both curing periods, the compressive strength data show similar trend of gradual increment along with higher percentage replacement of GGBFS except mixtures C-5SF-10GGBFS and C-0SF-20GGBFS at 28-day curing.
Actual values Summary AC is the highly-effective and energy efficient building material because of weight reduction, better sound absorption, and good insulation due to lower thermal conductivity.
Test results show that the combination of 5% SF and 20% GGBFS was found to be useful for strength development and reduction of porosity in the AC.
Online since: March 2007
Authors: Young Soo Kang, Beong Gi Jo, Jee Hean Jeong, Young Hwan Kim
These methods are based on the reduction process of precursor metal ions that include chemical reduction using different reducing agent, photoreduction, sonochemical and radiolytic methods [3].
Their syntheses have been achieved via various routes, including radiation methods, microemulsion techniques, supercritical techniques, sonochemical reduction, laser ablation, metal vapor synthesis, vacuum vapor deposition, chemical reduction, etc [5].
Element% and atomic% ratio of Cu-SiO2 nanoparticles Element Element% Atomic% O 28.58 51.85 Si 26.93 27.83 Cu 44.49 20.33 Total 100.00 100.00 We obtain remarkable EDS data of Cu nanoparticles.
EDS data of Cu-SiO2 nanoparticles Summary Silica coated with copper nanoparticles was prepared at room temperature.
Online since: October 2014
Authors: Xian Yan Wang, Chuan Wu Li
And below is an example with assumption data:A bus with an air tank 120 liter, work pressure 0.8Mpa, assuming one day can spend gas amount of 30 tanks, like this, there will be consumption 120*8*30*30 liter per month of gas, which are equivalent to 6.02*1023*120*8*30*30/24.45 of the number of gas molecules, however, the number of oil molecules is three millionth of the number of gas molecules.
Thus, it is no need to do any related actions for damping and noise reduction, but directly installed on the vehicle for running. 2) Piston type electrically driven compressor Piston type electrically driven compressor with the piston reciprocating motion, if there is no reduction processing, which will generate larger vibration and noise, meanwhile, this kind of compressor was mounted on diesel engine before, and the vibration and noise of diesel engine will be larger than piston type air compressor’s, but if this compressor used on new energy electric vehicles, it should be vibration and noise reduction processing.
By trying many experiments, we found if adding a muffler and a bracket vibration-reduction cushion, the effect of noise and damping resistance is very obvious, in addition, during the running of vehicle, due to the larger noise and vibration coming from the motor and tires, there is nearly no feeling that electrically driven compressor is running,.
When vehicle stationary but with the electrically driven compressor operating, the measuring results of noise and vibration on different positions are as below table1 Table.1 Measurement position Noise dB(A) Vibration 1 meter away from the vehicle 70(Rear hatch closed)75(Rear hatch opened) - The driver 60 no feeling of vibration on each seat The nearest seat from compressor 62 The effect can meet the noise and vibration requirements of new energy vehicles by good vibration damping (fig1.) and noise reduction Vibration reduction cushion Fig.1 Electrically driven compressor with vibration reduction cushion Below table2 lists performance comparison on three different types of electrically driven compressor which were assembled on the same vehicle: Table.2 Comparison items Twin cylinder piston type Screw type Vortex type Types of lubricant Traditional diesel engine oil Special oil Special oil Effect on safety of vehicle after oil carryover safe This special oil pollute the air system
, to make the rubber swelling and aging, brake system failure, dangerous Consumption of lubricant Little Much Much Environmental compatibility of lubricant No Pollute Environment Pollute Environment Pollute Environment Oil-gas separator No need Required Required Service life of oil filter Long Short Short life of oil separator filter -------- Short Short Environmental effect No Significant Significant pump Speed Only need 52s 1min and 30s 1min and 20s Solenoid valve control No Complex Complex vibration high (can reduce to 72 dB(A)),in vehicle more less low low Noise low low maintenance cost Low high high Conclusions As the above table, different types of electrically driven compressor have different advantages, but if considering the safety of the braking system and the following maintenance, in the present stage piston type air compressor is more appropriate, after all, vibration and noise of which can be acceptable after reduction measures.
Online since: November 2012
Authors: Wan Mohd Sufian Wan Husain
Historical Data and Information Perspective.
Collectively, historical data and information are capable of providing a better understanding for better design improvement and, consequently, be able to offer others benefits such as both cost and human error reductions [4-6].
There are different types of historical data available from reliable sources.
Process Flow for SDR Data Analysis.
The process begins with identifying the data range.
Online since: May 2012
Authors: Jie Wen Nie, Qiang Zhao, Yuan Dong Meng, Min Zhang, Yu Jing Chen
The purpose of this paper is to identify the modal parameters of a physical jacket-type platform model from measured modal testing data using Prony’s method.
The measured data are extracted from a physical model of a realistic offshore platform.
In solvingfrom the IRF data, the original Prony’s method has been based on the successive applications of Eq. (4) for 2N times.
Throughout the experiment, the data sampling frequency was 200 Hz.
An Eigensystem Realization Algorithm for Modal Parameter Identification and Model Reduction,J.
Online since: April 2015
Authors: Yoon Seok Shin, Ji Hun Kim
The findings of this research are expected to contribute to reduction of the noise between floors in an apartment building in the future.
The noise between floors was measured by housing type in this study according to civil complaints about the noise between floors through an investigation and an analysis of research data and existing literature.
As shown in Figure 2, which depicts noise measurement data by house type, the indoor noise levels of the multiplex house were at 32.16∼{TTP}8764 41.14dB(A)Leq and at 39.01∼{TTP}8764 53.93dB(A)Lmax, and averaged at 35.36dB(A)Leq and at 44.81dB(A)Lmax, respectively, which implies that the noise level cannot be ignored(Table 1) but the noise level cannot be ignored when measured by the maximum noise level.
The noise level was higher in the multiplex house than in the apartment household, and as such another approach to living management for residents is needed other than sound insulation of the structure stipulated in the current related laws to reduce the noise level of the multiplex house, and thus diverse plans for the noise reduction need to be introduced.
[2] National Environmental Dispute Resolution Commission, Statistical Data of Environmental Dispute Cases, (2013)
Online since: November 2011
Authors: Shi Fu Chen, Jin Feng Zhang, Xiao Ling Yu, Wei Liu
The photocatalytic activity of the photocatalyst was evaluated by the photocatalytic oxidation of rhodamine B (RhB) and reduction of Cr6+ under UV light irradiation.
It is clear that the photocatalytic reduction activity and photocatalytic oxidation activity increase with the increase in the amount of Nb2WO8 up to10 wt.%; however, when the amount of Nb2WO8 is higher than that of 10 wt.%, the photocatalytic activities decrease rapidly.
Therefore, both the photocatalytic reduction activity and the oxidation activity of the heterojunction Nb2WO8/ZnO are enhanced.
The photocatalyst exhibited excellent photocatalytic activity for photocatalytic oxidation of RhB and photocatalytic reduction of Cr6+.
Data.
Showing 5411 to 5420 of 40315 items