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Online since: October 2015
Authors: Jing Xia Guo, Xiao Yang Wang, Xiao Bin Cui
Different cutting tools such as PCBN, ceramic, coated carbide and fine-grained carbide were used.
The sampling length and number of spans were set to be 0.8 mm and 5, respectively.
The S/N ratio η for the resultant cutting force can be calculated as follows: (1) where n is the number of repeated test and Frj is the average value of the resultant cutting force Fr in the jth test.
The sampling length and number of spans were set to be 0.8 mm and 5, respectively.
The S/N ratio η for the resultant cutting force can be calculated as follows: (1) where n is the number of repeated test and Frj is the average value of the resultant cutting force Fr in the jth test.
Online since: October 2015
Authors: Kiyotaka Tanaka, Yutaka Yoshida, Yuji Ino
Their distribution depends strongly on the defects such as vacancies, dislocations and grain boundaries in the crystals.
Diffused or implanted element & temperature Total number of 57Fe to obtain one spectrum 57Fe depth profile & concentration Time after diffusion or implantation Radiation fluence Charge states of interstitial 57mFe Charge states of substitutional 57mFe Reference (1) 100keV 57Fe implanted RT&1073K 2×1015 /cm2 R=100nm △~100nm 2×1020/cm3 △t ~ days tmeas~100ns 57Co source /3.7GBq 5×106 g/cm2s 0 0 Present work (2) 57Fe diffused RT-1273K 1×1016 /cm2 D=1-500 mm △0.1-200 mm 1017-21/cm3 △t ~ weeks tmeas~100ns 57Co source /3.7GBq 104-6 g/cm2s 0/+1/+2 -1 /0/+1?
A depth profiles of 57Fe impurities and the numbers of collision events are shown in Fig.1 (b) as function of depth, which were estimated by a SRIM simulation [21] for the case of 100keV-57Fe+-implantation at room temperature.
Diffused or implanted element & temperature Total number of 57Fe to obtain one spectrum 57Fe depth profile & concentration Time after diffusion or implantation Radiation fluence Charge states of interstitial 57mFe Charge states of substitutional 57mFe Reference (1) 100keV 57Fe implanted RT&1073K 2×1015 /cm2 R=100nm △~100nm 2×1020/cm3 △t ~ days tmeas~100ns 57Co source /3.7GBq 5×106 g/cm2s 0 0 Present work (2) 57Fe diffused RT-1273K 1×1016 /cm2 D=1-500 mm △0.1-200 mm 1017-21/cm3 △t ~ weeks tmeas~100ns 57Co source /3.7GBq 104-6 g/cm2s 0/+1/+2 -1 /0/+1?
A depth profiles of 57Fe impurities and the numbers of collision events are shown in Fig.1 (b) as function of depth, which were estimated by a SRIM simulation [21] for the case of 100keV-57Fe+-implantation at room temperature.
Online since: April 2016
Authors: Ștefan Cotescu
Product development method [2]
After the project is contoured, having established the main high level characteristics such as number of parts, life expectancy or price goal, it is time for the development team to define the product through the use of an analytical approach, translating the product goals into basic requirements to be accomplished (Fig. 2).
On grained surfaces the defect is less visible, but even here defects can be unacceptable.
Acknowledgement This work is supported by the Romania’s Operational Program for Human Resource Development (POSDRU), financed from the European Social Fund and the Romanian Government under the contract number POSDRU/159/1.5/ S/132397.
On grained surfaces the defect is less visible, but even here defects can be unacceptable.
Acknowledgement This work is supported by the Romania’s Operational Program for Human Resource Development (POSDRU), financed from the European Social Fund and the Romanian Government under the contract number POSDRU/159/1.5/ S/132397.
Online since: January 2011
Authors: Xin Yi Xu, Mei Liu, Feng Wang
Since 1980s, the grain yield has increased, while water use efficiency has not improved, which resulted in more pressure to water resources subsystem.
In addition, a large deal of feed from fish culture results to rapid breeding of algal and large consumption of DO, and then some main economical fish (as parabramis pekinensis) have to spawn in a terrible water condition, so their number descend greatly.
The number of the fish that can bear low oxygen has increased.
In addition, a large deal of feed from fish culture results to rapid breeding of algal and large consumption of DO, and then some main economical fish (as parabramis pekinensis) have to spawn in a terrible water condition, so their number descend greatly.
The number of the fish that can bear low oxygen has increased.
Online since: October 2011
Authors: Yi Zhang, Dong Ming Guo, Gui He Li
Fig.1 CT scanning system
CT Image Analysis
Characteristics of CT images.CT scan image is an X-ray and material absorption coefficient μ of the relevant digital images, each pixel corresponding to a number in the image on the performance of different gray-scale, that is, each pixel has a corresponding gray value.
Figure 5 also greatly improved the contrast, you can clearly see the initial damage of the specimen, porosity, and contrasts significantly larger coal particles, exist within the pores, grain boundaries, microcracks and higher density mineral tuberculosis, no such damage sequence distribution, making the initial structure is very uneven.
Human vision is sensitive to the color, the human eye can distinguish only the number of gray levels, but it can distinguish between different hue, saturation of the thousands of color.
Figure 5 also greatly improved the contrast, you can clearly see the initial damage of the specimen, porosity, and contrasts significantly larger coal particles, exist within the pores, grain boundaries, microcracks and higher density mineral tuberculosis, no such damage sequence distribution, making the initial structure is very uneven.
Human vision is sensitive to the color, the human eye can distinguish only the number of gray levels, but it can distinguish between different hue, saturation of the thousands of color.
Online since: September 2015
Authors: Tomáš Melichar, Jiří Bydžovský
Based on findings in studies and research carried out by various foreign authors, it is evident that active fine-grained ingredients can be used as modifying binding components to improve the heat resistance of composites based on a silicate matrix.
At this point the formation of a larger number of cracks, although insignificant in width, already appeared at a temperature of 800 °C.
The visual assessment of the surface identified an increased number of narrow cracks in specimens exposed to temperatures of 800 °C and 1,000 °C.
At this point the formation of a larger number of cracks, although insignificant in width, already appeared at a temperature of 800 °C.
The visual assessment of the surface identified an increased number of narrow cracks in specimens exposed to temperatures of 800 °C and 1,000 °C.
Online since: August 2011
Authors: Jia Mu Huang, Yuan Yuan Liu, Guang Pei Wan
The service life of samples was indicated by the number of repetitions of the precede photocatalytic experiment.
Due to the low diffusion activity of atom, the critical nucleation free energy declines and the number of nucleating centers increases correspondingly.
The scanned area of the film is 1610 nm×1610 nm, and the surface with small nanometer sized grains and holes are clearly resolved in Fig. 2.
Due to the low diffusion activity of atom, the critical nucleation free energy declines and the number of nucleating centers increases correspondingly.
The scanned area of the film is 1610 nm×1610 nm, and the surface with small nanometer sized grains and holes are clearly resolved in Fig. 2.
Online since: December 2012
Authors: Li Min Wang, Xin Jian Lin, Xiao Xuan Qiu, Wei Hua Li, Ping Fan, Dong Feng Huang
Introduction
Rice is the major grain crop of the world, especially in southeastern China[1].
However, farmers’ blind application of large number of fertilizers to pursuit higher yields in recent years caused negative ecological effects of nitrogen and phosphorus accumulation which was much larger than the crop yield increment[4].
The mixed water was put into the sample bottles which were washed, dried and numbered.
However, farmers’ blind application of large number of fertilizers to pursuit higher yields in recent years caused negative ecological effects of nitrogen and phosphorus accumulation which was much larger than the crop yield increment[4].
The mixed water was put into the sample bottles which were washed, dried and numbered.
Online since: February 2015
Authors: Viktor N. Kudiiarov, Andrey M. Lider, Roman S. Laptev, Yurii Bordulev, Olga V. Husaeva
Low binding energy of 0.098 eV and large output intensity indicates a large number of weak hydrogen traps such as the crystal lattice.
During the annealing at the second cycle, hydrogen was redistributed from clusters to the pores and free volume of a larger number of clusters became “opened” for positrons.
Islamgaliev, Vacancy clusters in ultra-fine grained metals prepared by severe plastic deformation, J.
During the annealing at the second cycle, hydrogen was redistributed from clusters to the pores and free volume of a larger number of clusters became “opened” for positrons.
Islamgaliev, Vacancy clusters in ultra-fine grained metals prepared by severe plastic deformation, J.
Online since: August 2013
Authors: Jun Deng, Xu Ming Tan
During more than 2500 years from King Fuchai canalized the Han groove in Chunqiu Period to the early 20th century, the Canal was constructed constantly and grain was shipped across major rivers to the capital, which left behind an indelible imprint of political ideology, economy, technology and culture forms in the different periods of China, and is a testament of the determined Chinese national spirit and Great creativity.
The Grand Canal protection and management involves a number of provinces and cities, and the protection concepts in various departments are different, the specific protection measures are hard to reunification, so when destructive behavior happens, it is difficult to define and strengthen administrative accountability.
Acknowledgements This work was financially supported by the Ministry of Water Resources of the People’s Republic of China Water Resources Fee (Number: Shi Shui Zi Yuan Fei 1213).
The Grand Canal protection and management involves a number of provinces and cities, and the protection concepts in various departments are different, the specific protection measures are hard to reunification, so when destructive behavior happens, it is difficult to define and strengthen administrative accountability.
Acknowledgements This work was financially supported by the Ministry of Water Resources of the People’s Republic of China Water Resources Fee (Number: Shi Shui Zi Yuan Fei 1213).