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Online since: July 2018
Authors: Terence G. Langdon, Roberto B. Figueiredo, Pedro Henrique R. Pereira
The high reduction in area at the fracture tip confirms the ductile nature of the material at these testing conditions.
The average strain rate sensitivity for these data is ~0.3 which is high for conventional plastic deformation of magnesium but lower than expected for superplasticity [1].
The data shows that the material processed by rolling exhibits the highest flow stress and lowest strain rate sensitivity (slope of the data).
Online since: September 2013
Authors: Zhen Xian Lin
The selection of optimal parameter can make the noise reduction effect of the best image.
The experimental data in Table 1 clearly show, when the boat, baboon and airplane images which its variance with Gauss noise were 0.01, 0.03, 0.05, 0.10 and 0.50 were de-noised by the soft threshold and the hard threshold and improved threshold function de-noising method, the PSNR of improved threshold function de-noising method obtained higher 4-6db than the PSNR of the soft threshold, especially, for the image with the strong Gauss noise, the PSNR of improved threshold function de-noising method is obviously better than the PSNR of the soft threshold method .
By comparing the data in Table 1, the new threshold function de-noising method which was proposed in this paper achieved relatively satisfactory results for image de-noising, especially suitable for strong Gauss noise peak value, can effectively improve signal to noise ratio, the de-noised images closes to the original image.
Table 1 The de-noising data of the boat, the baboon and the airplane, (PSNR/db) the boat the baboon the airplane variance with Gauss noise 0.01 0.03 0.05 0.10 0.50 0.01 0.03 0.05 0.10 0.50 0.01 0.03 0.05 0.10 0.50 hard threshold method 21.79 16.47 14.38 11.97 8.46 20.83 16.57 14.62 12.18 8.35 21.64 16.75 14.90 12.32 8.36 sort threshold method 28.62 22.63 19.98 16.84 12.15 22.54 20.13 18.50 16.06 11.57 27.76 22.65 20.33 17.00 11.75 improved threshold method 30.04 27.52 26.06 23.76 18.11 22.92 20.72 19.82 18.59 15.44 28.67 26.31 24.99 22.54 16.58 Conclusion Based on the de-noising shortcomings of soft threshold and hard threshold function, a new threshold function de-noising algorithm was given in this paper.
Online since: August 2013
Authors: Wen Pan, Yi Xiang Xu, Sheng Lan Zhu
Researches show that, as a vibration reduction control technology of structures [2], friction energy dissipation brace not only can increase the stiffness of frame structure but also could improve the seismic performance observably.
Interlayer displacement and displacement angle under rare earthquake Length of intermediate platform (mm) Tilt angle β of brace Interlayer displacement(mm) Average displacement (mm) Interlayer displacement angle Interlayer displacement angle α=45o (α=50o) ELCENTRO Tangshan seismic wave Artificial wave L=1400 45° 13.61 25.77 17.63 19.00 1/189 1/189 50° 13.58 25.88 17.69 19.05 1/189 55° 13.54 26.27 17.90 19.24 1/187 60° 13.69 26.87 18.21 19.59 1/184 65° 14.05 27.54 18.58 20.05 1/180 L=2400 45° 16.21 27.65 19.09 20.98 1/172 1/173 50° 16.14 27.35 18.86 20.78 1/173 55° 16.12 27.40 18.90 20.81 1/172 60° 16.14 27.70 19.13 20.99 1/172 65° 16.23 28.21 19.47 21.30 1/169 From the data in Table 1, it can be seen that under the function of these three waves, when we take the length of intermediate platform L=1400(mm) (α=45° in the symmetrical brace) and the tilt angle of brace β=45°-65°, through the analysis and calculation of finite element software, increasing of the tilt angle has little influence
Brace force and internal force of frame beams near the brace Length of intermediate platform (mm) Tilt angle β of brace Brace force Internal force of frame beams near the brace N max V max M max N max V max M max L=1400 β=45o 913.14 62.27 183.74 614.63 189.52 551.16 β=50o 822.70 71.61 193.94 566.60 191.875 539.28 β=55o 748.04 78.94 200.33 559.06 195.15 528.83 β=60o 786.20 85.88 204.30 582.30 201.34 519.93 β=65o 720.82 88.28 193.28 603.86 223.97 567.55 α=45o 907.32 62.88 184.47 611.59 189.38 550.39 According to the data shown in Table 2, we can discover that the axial force of unsymmetrical friction energy dissipation brace is reduced by 20.56% than the symmetrical K-type friction energy dissipation brace when we remain the length of intermediate platform unchanged and take the tilt angle of brace β=65°, while the shearing force is increased by 40.39% and the bending moment is increased by 4.78%.
Hysteretic energy of the damper under the rare earthquake Hysteretic energy of the damper(KN·m) β 45° 50° 55° 60° 65° α=45°;L=1400 α=50°; L=2400 L=1400(mm) 94.567 94.863 95.595 96.466 97.063 94.566 74.881 L=2400(mm) 75.423 74.888 75.116 75.824 76.752 According to the data shown in Table 3, we could discover that the hysteretic energy of the damper of unsymmetrical K-type brace are similar under the rare earthquake when we remain the length of intermediate platform unchanged and take the tilt angle of brace β=45°-65°.
Online since: October 2014
Authors: Kun Shi, Liang Liang Zhou
The period since the emergence of humans has displayed an ongoing biodiversity reduction and an accompanying loss of genetic diversity, caused primarily by human impacts, particularly habitat destruction.
Sorting and Filtering Data.
First, low quality sequences (50 consecutive base average >25, length of sequence >50) were truncated to control the quality of original data.
According to OTU data obtained, each sample of Rarefaction Curve was made, showing that the sampling depth for each sample. 
Online since: January 2021
Authors: Takahiro Kunimine
In binary Cu-Zn solid-solution alloys, adding zinc solute atoms to the copper matrix provides further reduction of the SFE [6].
In the case of the CAC301, the data point for the CAC301 still stays on the extension of the fitting curve for the data points of the binary Cu-Zn solid-solution alloys (only α phase) although β phase was confirmed by the XRD analysis in the CAC301 of HPT 5R.
On the other hand, the data point for the CAC304 significantly deviates from the fitting curve for the solid-solution alloys.
Online since: September 2015
Authors: Nikolay Rogalev, Evgeniya Oleynikova, Andrey Rogalev
Parameter Value Power-generating unit capacity 1000 [MW] Fuel type coal Initial steam parameters: – pressure – temperature 35 [MPa] 710 [°C] Resuperheat steam parameters: – pressure – temperature 7 [MPa] 720 [°C] Feed water temperature 330 [°C] Gross electric efficiency 50.96 [%] Net electric efficiency 48.74 [%] Combustion value 25 000 [kJ/kg] Specific reference fuel consumption for electric power generation 0.241 [kgrf/(kW·h)] Specific reference fuel consumption for electric power output 0.252 [kgrf/(kW·h)] Natural fuel consumption 82.12 [kg/s] Specific natural fuel consumption for electric power generation 0.282 [kg/(kW·h)] According to the data [5], the main-steam and resuperheating pipelines of power-generating units with ultra-supercritical steam parameters, with the total length of about 190 meters, require the most of heat-resistant materials.
Heat temperature, [°C] Cost of materials used for pipeline production, [$/t] Cost ratio 560 11 041 Basic 600 56 780 5 700 473 000 43 As it is seen from the given data, the cost of materials of super-supercritical parameter power-generating unit pipelines is by 5 times higher compared to the cost of materials for supercritical parameters; and for ultra-supercritical materials this value shall be 43.
In compliance with the data from Table 1, the cost of pipelines in units with ultra-supercritical steam parameters shall increase at least by 8.6 times.
The mentioned problem, i. e. reduction of length of high-temperature pipelines, could be solved by means of transition to hybrid steam-turbine power-generating units.
Online since: May 2013
Authors: Hai Yan Shen
The discrete into difference equations, the k film output: U(k)= Kpe(k)+KITs∑Ki=1e(i) MATLAB simulation modeling and analysis of waveform The current regulator and speed regulator simulation model using the I type system, the data used by engineering method to calculate the parameters, and according to the experience of MATLAB simulation waveforms can be adjusted slightly, from Figure 1 and Figure 2 shows the knowable Figure 1.
When the load is reduced, the armature current is the appearance of a large numerical decrease fluctuations, so that the armature load current state to a new steady value the stability and load reduction compared to before, the numerical change small.But due to the experimental testing in unstable conditions so that the accuracy of the data is maintained in a changes within the range of.
Spinning Wheel Integrated Force Transducer (SWIFT)-Accurate and Reliable Data Acquisition and Vehicle Testing. www. mts. com
Online since: September 2018
Authors: Victoria A. Gurieva, Aleksandr V. Doroshin, Viktor V. Dubineckij
Introduction Over the past decade there has been a significant reduction in previously developed reserves of high-quality clay raw materials for the needs of the Russian ceramic industry.
As a result of the analysis of the obtained data, it is established that as the grinding time increases, the content of clay and dust particles increases.
The analysis of the obtained data indicates that in the process of dispersion in a ball mill the primary framework structure of the components of the charge breaks down, as a result of which the raw material plasticity on the basis of clay raw material and man-made waste increases, and the physical and mechanical characteristics of the samples improve.
The analysis of the obtained data shows that in the process of the dispersion of the material, the material of the material waste increases, and the physical and mechanical characteristics of the samples improve.
Online since: March 2017
Authors: Eva Pramuni Oktaviani Sitanggang, Chandra Wahyu Purnomo
Based on data from the Ministry of Agriculture, total fertilizer requirements for this sector in 2015 was 9.55 million tons with the highest demand for urea at 4.1 million tons/year [1].
The aim of the modeling is to determine the effective diffusivity (Deff) of each pellet type in Eq 1, that being correlated with the experiment data using sum of square error (SSE) method.
For the binder added pellets the reduction of the diffusivity is depend on the type or binder rather than the concentration.
It should be noted that during Deff calculation the assumption of constant pellet size and shape was used, the data with pellet breakage cannot be represented entirely.
Online since: October 2004
Authors: X. Huang, Niels Hansen, Q. Xing
Experimental A commercial purity aluminum (AA 1200) was cold rolled to a true thickness strain of 2 (a thickness reduction of 86.5%), and isochronally annealed at various temperatures for 2 h in an oil bath at temperatures up to 260 ºC, and in a salt bath at 280 ºC and above, and immediately water quenched after annealing.
In a previous study by TEM [4], average values of the boundary spacing and misorientation angle across boundaries have been measured and the present data are in good accord.
Data for spacing and misorientation angle given in Table 1, illustrate that the boundary spacing in the two regions is similar and that the misorientation angle is much smaller in the regions of Copper orientation.
Data in Table 1 allow the stored energy to be estimated according to Ref. [1] and it is found on average to be two times smaller in the regions of rolling components than in the regions of other orientations.
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