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Online since: August 2017
Authors: Mohamad Hosein Sadeghi, Maedeh Sadat Zoei, Mehdi Salehi
Specifications of grinding wheel and grinding parameters
Parameters
Value
Average grain size(μm)
75
Grade
R
Concentration number
75
cutting speed (vc)(m/s)
30
Feedrate (vw)(mm/s)
413
Depth of cut (ap) (μm)
4
Residual Stress Measurement
In this study, X-ray diffraction (XRD) technique using sin2ψ method was utilized to measure surface residual stresses.
Online since: September 2014
Authors: Ng Hoon Kiat, Suyin Gan, Seyed Amirmostafa Jourabchi, Mandy Su Zan Gui
Numbers of pyrolysis studies have been carried out based on combined feedstock such as sewage sludge with rice waste [3] and sugarcane bagasse with petroleum residue [4].
Then, dried coconut shells and rice husks were grinded into powder with grain size of (<1 mm).
Then, dried coconut shells and rice husks were grinded into powder with grain size of (<1 mm).
Online since: January 2011
Authors: Rong Jun Zhao, Xian Bao Cheng, Wei Wei Shuangguan, Juan Sun, Ben Hua Fei
Calculated fir tensile strength in the saturated state is only lower than the average air-dry state of 4.1% and 5.5% lower, than the average of pine, far less than the moisture content effect of grain of the macro-tensile strength.
Fig. 2 Longitudinal tensile strength Fig. 3 Longitudinal tensile strength of of Chinese fir tracheids Masson pine tracheids Pine wood tracheid longitudinal tensile strength after heat treatment Table 2 Zero-span tensile strength of the tracheids of heat-treated Masson-Pine Treatment level 160℃(2h) 180℃(2h) 180℃(3h) 180℃(4h) 200℃(2h) 220℃(4h) Number of samples 23 24 24 24 24 14 Max /MPa 415 445 387 392 380 268 Minimum /MPa 354 364 323 330 320 217 Average/MPa 384 395 364 357 343 242 Standard deviation 16.018 26.563 18.812 15.441 13.238 17.451 Coefficient of variation/% 4.17 6.72 5.17 4.32 3.86 7.19 After heat treatment, longitudinal tensile strength of fir and pine’s earlywood has been reduced in comparison with the control samples, and pine wood decreased more significantly.
Fig. 2 Longitudinal tensile strength Fig. 3 Longitudinal tensile strength of of Chinese fir tracheids Masson pine tracheids Pine wood tracheid longitudinal tensile strength after heat treatment Table 2 Zero-span tensile strength of the tracheids of heat-treated Masson-Pine Treatment level 160℃(2h) 180℃(2h) 180℃(3h) 180℃(4h) 200℃(2h) 220℃(4h) Number of samples 23 24 24 24 24 14 Max /MPa 415 445 387 392 380 268 Minimum /MPa 354 364 323 330 320 217 Average/MPa 384 395 364 357 343 242 Standard deviation 16.018 26.563 18.812 15.441 13.238 17.451 Coefficient of variation/% 4.17 6.72 5.17 4.32 3.86 7.19 After heat treatment, longitudinal tensile strength of fir and pine’s earlywood has been reduced in comparison with the control samples, and pine wood decreased more significantly.
Online since: July 2011
Authors: Mi Mi Tian
Moreover, the kitchen should be big enough to store all kinds of food and goods including tablewares, cookers, seasonings, grains, dried food, fruits, vegetables and drinks, and they should be easy to reach.
The references are to be numbered in the order in which they are cited in the text and are to be listed at the end of the contribution under a heading References, see our example below.
The references are to be numbered in the order in which they are cited in the text and are to be listed at the end of the contribution under a heading References, see our example below.
Online since: June 2012
Authors: Fan Yang, Tong Nian Shi, Han Chu, Kun Wang
Introduction
In recent years, a large number of research results indicate that Graphics Processor Unit (GPU) has great advantage compared with the CPU in solving compute-intensive problems [1].
This mixed programming model can leverage both MPI programming and OpenMP programming: MPI for coarse-grained communication between processors or nodes, and OpenMP for inter-processor communication of a multi-processor computer.
This mixed programming model can leverage both MPI programming and OpenMP programming: MPI for coarse-grained communication between processors or nodes, and OpenMP for inter-processor communication of a multi-processor computer.
Online since: July 2012
Authors: Qing Li
The particle size and the crystalline structure of the product samples were detected by means of X-ray analysis with a BD-86 diffractometer(Japan) and Mastersizer 2000 Laser grain-size analysis meter(England).
The radius of iron is similar to titanium, Fe3+ can go into the lattice of TiO2, insteading of Ti4+, improve the number of oxygen vacancies between surface and inner of the lattice of TiO2.
The radius of iron is similar to titanium, Fe3+ can go into the lattice of TiO2, insteading of Ti4+, improve the number of oxygen vacancies between surface and inner of the lattice of TiO2.
Online since: May 2011
Authors: Xiao Ming Guan, Chang Feng Yuan, Guang Ming Yu, Qian Qian Zhao, Jing Bo Zou
Subsurface excavation damages to the surroundings in various degrees and results in many negative impacts, such as surface settlement in city, underground reservoir’s decrease,earthfall or landslide,which will inevitably lead to a large number of surface damage to buildings and facilities,constructor’s casualties and water environmen’s deterioration.The Subsurface excavation even leads to geologic hazard,( such as geodynamic release, earthquake, underground cross-off induced by urban underground empty) which will seriously affected the city’s working and sustainable development[2].
Some partial section is filled-type structural development and it will be cutting as rock base’s corase-grained granite.
Some partial section is filled-type structural development and it will be cutting as rock base’s corase-grained granite.
Online since: February 2011
Authors: R. Durairaja, L. Chiawea, Kau Chee Leong, Wong Mee Chu, Liang Meng Suan
., they tend to be enriched at grain boundaries and/or phase boundaries for their relative large atomic radius and thus improve the microstructure stability of the solder.
Besides shearing/inflow collision, Brownian motion can also cause an increase to the number of aggregates in the system.
Besides shearing/inflow collision, Brownian motion can also cause an increase to the number of aggregates in the system.
Online since: April 2011
Authors: Ping Xue, Xue Yi Guo, Qing Hua Tian
The cemented carbide produced by ultra-fine cobalt powder can reduce the porosity and avoid the formation of cobalt pool, which can separate WC grains.
When the temperature rises to 700°C, the product contains a large number of ß-Co with the proportion of ɑ-Co and ß-Co of 1:1 approximately.
When the temperature rises to 700°C, the product contains a large number of ß-Co with the proportion of ɑ-Co and ß-Co of 1:1 approximately.
Online since: September 2013
Authors: Azrriq Bin Zainul Abidin, Yupiter Hp Manurung
In the modern world, forging process is applied by sets of die and tooling which deliver the compressive force to form desire shape from simple billet [2] This compressive force used in forming the parts, allows the grain to be aligned with the die contours which made the part to have a superior strength compared to casting and machining process [3].
This Simulation software package also allows the forgers to test a number of “what if” scenarios and determines the optimum condition without having to test-run the die [4].
This Simulation software package also allows the forgers to test a number of “what if” scenarios and determines the optimum condition without having to test-run the die [4].