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Online since: October 2010
Authors: Hui Ping Zheng
Stability margins for different motion states in rotor systems are defined based on trajectory-based stabilitypreserving dimensional-reduction (TSPDR) in a quantitative stability analysis method for rotor systems.
Experiment results in a rotor experiment rig show that regular pattern of stability margin of quasi-periodic motion calculated from measured data accords with the rule of above method.
When bifurcation diagram is calculated based on measured data by means of DASP software, point of FFT is 2048 and spectral line 2000.
Fig. 5 Stability margin of quasi-periodic motion for m=0 Fig. 6 Stablilty margin of ouasi-periodic motion foe m=0.820 Results Experiment results in a rotor experiment rig show that regular pattern of stability margin of quasiperiodic motion calculated from measured data accords with the rule of the quantitative stability analysis method.
At the same time, measured signal contains various noisy signals, and then a lot of work how to reduce noisy signals in measured data should be done in the future.
Online since: November 2016
Authors: Qing Liu, Pi Zhi Zhao, Zhi Hong Jia, Zhi Qing Zhang, Zhang Wen, Ying Ying Liu
After intermediate annealing, the Cube and Cube+ND20 texture replace the deformation texture and rise with the rolling reduction.
Statistical data show that the volume fraction of Cube and Cube+ND20 components are 15.95% and 12.34% in the AIA-50 sample, and 11.95% and 13.59% in the AIA-60 sample, respectively.
By comparsing the volume fractions of the texture components in Fig 8, it could conclude that with increasing the rollling reduction, the dominated texture changed from Cube and Cube+ND20 to S, Copper and Brass, and when the cold-rolled reduction reaches 85%, the deformation texture strongly increased.
In addition, the recrystallized grain size decreases with the increase of rolling reduction.
PSN and nucleation at shear bands dominate the competition of recrystallization mechanism with the increaseof rolling reduction.
Online since: October 2013
Authors: Daniel Macdonald, An Yao Liu
Secondly, the two wafers demonstrate different reduction time constants.
The time constant is determined via an exponential decay fit to the data.
An exponential relation of C(t) = Co[1-exp(-t/τ)] is used to fit the data.
The solid lines are model fitting [11] to the experimental data.
The area shaded in grey represents the amount of Fe gettered by the GB during the annealing process occurred in between the red and green data.
Online since: September 2005
Authors: Joseph Morlier, F. Bos, P. Castera
Benchmark of Damage Localisation Algorithms using Mode Shape Data J.
This paper presents a comparative study of three enhanced signal processing methods to locate damage on mode shape data.
The undamaged case is estimated here using a non-linear fit algorithm between experimental data and analytical mode shape [6].
Continuous Wavelet Transform (CWT) We use the ability of CWT to extract damage from mode shape data [8].
It clearly exhibits the abilities of CWT to identify damage even with noisy data.
Online since: May 2012
Authors: Gui Mei Gu
When in reasoning and decision-making of the new data using the multiple level rules set, match the information of the new data with the rule of its corresponding node.
With the minimal decision rule, we can make decision to the new data.
In order to obtain classified ability to the noise and abnormal data, improve the capacity in the classification of new data, and give the maximum possible solution to problems as much as possible when all the information is not complete,this article adopts the following steps to extract multiple level rules set model: l Write original data in the form of a decision table.
After the above steps, extract the rules of various levels from the original data.
Then match the current data attribute values with rule set of the node.
Online since: October 2011
Authors: Rui Sheng Hu, Xue Li, Jia Nan Hu, Ya Qin Bai
H2-TPR (Temperature-Programmed reduction) TPR used the GC method with a thermal conductivity detector.
The reduction mixture gases were purified using a 105 deoxidizer and silica gel; flow-rate of the mixture of H2 and N2 was 40ml/min.
In this work, the specific surface area of these carriers forα-Al2O3, cordierite andγ-Al2O3 ,respectively, was ~12m2/g, ~6m2/g,and ~140m2/g.Those data indicated that the surface area of α-Al2O3 was further twice as large as that of cordierite, so the activity of L-S-C-O/α-Al2O3 was better than that of L-S-C-O/cordierite.
Fig.2 The XRD patterns of samples Temperature-programmed Reduction The TPR profiles concerning pure carrier, pure active component and a few kinds of prepared catalysts were given in Fig.3, which showed that a few kinds of pure carrier had not any high reduction peaks suggesting the carrier was unable to be reduced at range of experiment temperature (under 700℃).
Then there was a small reduction peak of carrier γ-Al2O3 at 550℃, probably hydroxyl reduction peak.
Online since: February 2024
Authors: Budisantoso Wirjodirdjo, Agus Sugiyono, Edi Hilmawan
LCOE data for various power generation technologies is available at ACE [17], IRENA [19], and IEA [20].
Note: Calculated based on data from [1], [2], [5], [14], and [15].
[12] Ditjen EBTKE, Statistik EBTKE 2016, Kementerian Energi dan Sumber Data Alam, Jakarta, 2016
[14] Ditjen Gatrik, Statistik Ketenagalistrikan 2020, Kementerian Energi dan Sumber Data Alam, Jakarta, 2021
[23] Danish Energy Agency, Technology Data for the Indonesian Power Sector, 2021
Online since: February 2014
Authors: Zhu Lian Gao, Pei Ni Shang
This scheme has high security and can resist the minimal rank, rank reduction attacks and oil-vinegar attacks, etc.
Introduction Authentication is a basic security service in WSN, which is directly related to the operation of a series security of key management.[1] It is an important Methods to distinguish the validity of data, identify the node identity, ensure the routing security etc.
This scheme has high security and can resist the minimal rank, rank reduction attacks and oil-vinegar attacks, etc.
This scheme has high security and can resist the minimal rank, rank reduction attacks and oil-vinegar attacks, etc.
But the security analysis of the rainbow signature mechanism generally need to select the number of oil and vinegar variables related, and then the author analyzes these data.
Online since: March 2015
Authors: Fang Zhang, Xi Chen, Yu Hui Sha
The deviation angle can reach about 20° after 70% applied reduction under the friction coefficient of 0.20.
Introduction Weight reduction has become one of the major goals and principals of engineering design and manufacturing.
The channel die compression was performed up to 70% reduction, and the data of shear strain fraction (activity) for each deformation mode and crystallographic orientation were extracted at each 10% reduction.
Table 1 gives the shear strain fractions of pyramidal slip at 70% applied reduction for various initial orientations.
Table 2 lists the deviation angles from ideal <0001>//ND after 70% applied reduction for various initial orientations.
Online since: March 2012
Authors: Anita Ramli, Muhammad Farooq, Duvvuri Subbarao
It is clear from TPR profile that Mo/γ-Al2O3 catalyst displayed two reduction peaks with temperature maxima at 535 oC and 971oC, ascribed to the reduction of Mo oxide species.
The first peak at Tmax= 535 oC is attributed to the reduction of Mo6+ to Mo4+ species of polymeric Mo structures.
The second peak at Tmax= 971 oC is attributed to the further reduction of Mo species produced during the reduction in the first stage, together with the partial reduction of support strongly interacting with coordinated tetrahedral Mo species (Mo3+ to Mo2+) [10].
This increase in the reduction temperature maxima showed strong metal-support interaction.
Representative H2 TPR data for different catalysts Catalyst Reduction Temperature (oC) Peak 1 Peak 2 Mo/γ-Al2O3 535 971 Mo/γ-Al2O3- 5 wt % MgO 596 975 Mo/γ-Al2O3- 10 wt % MgO 627 990 Mo/γ-Al2O3- 15 wt % MgO 644 997 Mo/γ-Al2O3- 20 wt % MgO 664 1004 Similarly, the XPS results for different Mo catalysts are given in the Table 3.
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