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Online since: August 2007
Authors: K.H. Lang, Detlef Löhe, Scheida Seyedi
Adequate procedures are the reduction of the porosity or the reduction of the number of large pores by warm pressing, high temperature sintering or sinter forging as well as suitable heat treatments [3].
Fig. 5 and 6 show such data for the case-hardened bending specimens at R = −1 (Fig. 5) and R = 0.1 (Fig. 6).
Landolt-Börnstein, Group VIII: Advanced Materials and Technologies, Volume 2, Materials, Subvolume A: Powder Metallurgy Data, Part 1: Metals and Magnets Springer-Verlag, Berlin, Heidelberg, New York, (2003)
Online since: September 2005
Authors: Michael Ferry, John F. Humphreys
The crystals were cold rolled in a two-high rolling mill to a total true strain of 1.4 by ~ 5% incremental reductions.
Data analysis was carried out using both HKL and VMAP software [12].
This technique is more powerful than TEM for the purpose of orientation analysis of large areas of microstructure as it generates large, statistically relevant data sets. 3.
Single crystals of face centred cubic metals of the Goss orientation, {110}<00l>, are generally stable for reductions of up to 95% by rolling or plane strain compression [1-4].
Online since: February 2013
Authors: Zhi Shou Zhu, Yong Qing Zhao, Hui Li, Liang Feng, Lian Zhou, Heng Lei Qu, Ming Qiang Li
Second, the detail data of content were determined by crystal structure metallurgical method, which defined as Ti-(6.5~7.9)Al-(1.6~2.6)Sn-(1.6~2.6)Zr-(1.8~2.8)Mo-(0.9~2.3)Cr-(1.6~2.6)Nb-(0.8~1.8)Ni-(0~0.5)Si in mass or weight percentage, which is transformed from atom percentage originally [6].
As shown in Table 1, three chemical compositions were designed to study the actual difference in extreme situations, alloy S1 added with all maximum data of the alloying elements, and alloy S2 with maximum b stabilized elements and minimum a stabilized elements & neutral stabilized elements, while alloy S3 is the vice-versa of S2, i.e. with maximum a stabilized elements Al & neutral stabilized elements Sn, Zr and minimum b stabilized elements Mo, Cr, Nb, Ni, Si.
T (b) Figure 2 EB welding samples of the Ti alloy Table 4 Impact toughness and Fracture toughness of the billets at RT Alloy aKU (J/m2) KIC (MPaÖm) State S1 3.3 17 R S2 3.3 17.8 R S3 6.7 23 R S1 2.5 13.3 M S2 6.7 31.3 M S3 10.1 29.4 M Figure 3 Transverse metallographic photographs of the Ti alloys at R / M state When the temperatures changed, the tensile strength including ultimate tensile strength & yield strength and the plasticity including elongation & reduction in area will change accordingly.
Itoh, et al., Microstructures and Mechanical Properties of Gum Metal Sheets Correlated with Cold Rolling Reduction, in Ti-2007 Science and Technology, edited by M.
Online since: November 2015
Authors: Rayapati Subbarao, Chava Y.P.D. Phani Rajanish, Akkaraju H. Kiran Theja
Lapuerta et al. [1] found increased specific fuel consumption when using biodiesel due to the reduction in heating value of biodiesel.
The obtained results were compared with data from high speed diesel which indicates increase in brake specific fuel consumption and exhaust gas temperature, decrease in brake thermal efficiency.
Reduction in CO2, HC and NOx emissions were observed for preheated jatropha oil compared to those of high speed diesel.
Experimental data is used to compare the performance of the engine, exhaust emissions and the percentage of heat losses with diesel and bio-fuels.
Online since: February 2011
Authors: Wen Yang, Jun Wang, Shu Hua Liu
According to the data of Table.2, we can draw Fig1 and get the relationship between elastic modulus and content of fly ash: (n=24, R2=0.782) (1) Where, F/B is content of fly ash (%); E is compressive elastic modulus of concrete (GPa).
Table.3 Adiabatic Temperature Rising of Mass Concrete Project F/B (%) Age(d) 1 3 5 7 14 28 Longshou 53.2 2.5 14.1 16.8 18.0 19.4 21.3 66.1 2.0 8.3 11.0 13.6 16.0 18.8 Longtan 42.0 3.4 7.8 10.5 12.5 16.9 19.8 46.0 3.2 7.6 10.1 11.6 14.0 15.4 51.0 2.5 5.7 7.7 9.0 11.6 13.1 Sanxia 20 6.0 15.5 17.9 19.5 21.6 22.3 30 3.3 14.9 17.2 18.4 20.0 20.5 40 3.7 13.0 15.6 16.7 18.6 19.6 Influence of Fly Ash on Dry Shrinkage of Mass Concrete Dry shrinkage is the result of volume shrinkage that is caused by water reduction in interior concrete.
This data indicate that the more content of fly ash, the lager creep of concrete at the age of 90 days, moreover, the creep of mass concrete whose content of fly ash is 58.3% doubles that whose content of fly ash is 54.5%.
Primary mechanism is: Firstly, Shape effect of fly ash brings water reduction potential energy, which is helpful to reduce unit water, consequently, and we can drop cement content, reduce adiabatic temperature rising and probability of producing crack in concrete in the condition of ensuring proper strength, densification is also included.
Online since: September 2013
Authors: Yang Meng Tian, Yu Duo Zheng, Wei Jin, Gai Hong Du
Comparing with other methods (such as optical flow model), on the one hand, Gabor transform can stand a certain degree of image deformation and rotation, and it is not sensitive to the light changes, when using Euclidean distance to identify, it does not require strict counterpart of the to be recognized face and the face template, and it can improve the robustness of the system; On the other hand, the data quantity that it processed is less to meet the requirements of the system to real-time.
So that you can drop the face characteristic data from the f-dimension to the t-dimension (f << t).
The method of PCA combined with LDA (PCA + LDA) The PCA and LDA analysis shows that the PCA method realized feature space dimensionality reduction but did not consider the category information of the sample;while LDA method take full account of the category information of the training samples but there are problems of calculation matrix dimension too large and difficult to solve.
Table 2 and Table 1 shows the method of selecting PCA + LDA as face image Gabor features selection got high recognition rate, while time complexity and space complexity of the PCA + LDA method are relatively low, then this paper adopting the PCA + LDA method as feature selection method of space dimensionality reduction.
Online since: February 2011
Authors: Qing Na Zeng, Sheng Li Lv, Lei Jiang Yao, Xiao Yan Tong
Under LVI loading, the composites are apt to cause matrix cracking, delamination and even fiber breakage, subsequently resulting in significant reductions in its strength and stiffness.
However, very few data on QSI of CMC are available in the literature as they are restricted to very specific materials and experimental conditions.
Herb et al. [13] observed the tri-dimensional woven SiC/SiC composites’ damage subjected to QSI with optical and scanning election microscopy and found the strength reduction is proportional to the diameter of the damage zone evaluated on the back side of the specimen.
Fig. 5 and Fig. 6 are two representative AE data plots.
Online since: February 2019
Authors: Denis A. Rogozhnikov, Oleg A. Dizer, Stanislav S. Naboichenko
The reduction of the easily developed and alluvial gold deposits, however, forced gold mining companies to involve so-called refractory ores and concentrates in processing.
The purpose of this work is to carry out analytical studies to determine the elemental and species compositions of the materials studied; determine the optimal parameters of nitric acid leaching; determine the most significant factors affecting the decomposition of sulphides and confirm the adequacy of the experimental data obtained.
This process will allow the nitric acid regeneration (4) at subsequent stages of the process, which in turn contributes to a significant reduction in the consumption of the oxidant: ΔG0353= -145,2 kJ/mol (3) ΔG0353= -203,9 kJ/mol (4) As can be seen from the presented calculations, the values of the Gibbs energy changes have negative values, which indicates that the course of these reactions is thermodynamically probable.
The high values ​​of the determination coefficients are confirmed by the data in the example in Figure 5, which shows the close position of the assumed extraction values ​​and the values ​​obtained by the experimental method.
Online since: August 2017
Authors: Agus Setiabudi, Rani Arifin, Galuh Yuliani
Ferric sulphate was employed in a secondary wastewater treatment after wet oxidation; 83% colour removal and 75% lignin reduction was reported [4].
For all data set collected at different applied voltages, the optimum removals of MB were achieved at 200 ppm of SDS concentration where 84% of MB removals achieved.
The graph trends were similar for all data set, indicating that at a high concentration of SDS the coagulation efficiency may decrease.
Srinivasakannan, Decolorization and COD reduction of paper industrial effluent using electro-coagulation.
Online since: May 2016
Authors: Sorin Porojan, Florin Topală, Liliana Porojan
The collected data were used to construct three dimensional models using Rhinoceros (McNeel North America) NURBS (Nonuniform Rational B-Splines) modeling program.
The design of the prepared tooth was achieved according to the clinical rules listed as follows: about 2 mm occlusal reduction, a 0.8 mm deep reduction chamfer margin, 6 degree convergence angle.
Roos, The fracture load and failure types of veneered anterior zirconiacrowns: an analysis of normal and Weibull distribution of complete and censored data, Dent.
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