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Online since: November 2010
Authors: Xiao Min Guo, De Kui Niu, Shun Bao Lu, Wen Yuan Zhang
We researched on the observation under a microscope and found that the high APS to grain of bamboo was main attributable to vascular bundle arrangement of the rules, and effects of soil AK content on the APS were larger than AN and AP.
Acknowledgement The work reported here has been funded by IPNI ; Projects from National Natural Science Foundation of China Number: 30860226 (Moso bamboo); Agricultural Scientific and Technological Production Funds Project of Ministry of Science and Technology Number: 2008GB2C500149; Ministry Education Youth Foundation of Jiangxi Province (GJJ10093); National Science and Technology Support Project Number: 2008BADA9B0802 (Moso bamboo); Excellent funded projects for returnee of ministry of personnel Number: (2007)170 (watershed ecology).The authors want to take this opportunity to thank all of the supports.
Online since: May 2014
Authors: Janusz Nowotny, Daniel Gregg, Lou Vance, Ted Bak, Armand Atanacio, Joel Davies, Mihail Ionescu
Specifically, the energy conversion efficiency of the photo-electrochemical cell depends on the surface electronic structure, the charge separation and charge transport capacity, the Fermi level of the surface layer and on the number of the reactive surface sites.
Thus, the role played by difference in chemical composition between the bulk and the surface, as well as the difference in the number, the type and the distribution of defects between the bulk and the surface, must be understood in detail.
The BG of surface layer can be modified by doping, and a number of dopants were proposed and tried, such as Cr, Mo, V, Nb, N and Oxygen vacancies (VO..).
The BG in TiO2 can be lowered by doping, and in Fig 2 we summarised a number of results, including a comprehensive DFT study on C doping [2].
Fig. 6: SEM of polished and annealed polycrystalline rutile: (a)- before implantation; (b)-after 31keV Ti; and (c)-after 67keV Pt implantation at 1016at/cm2 In Fig. 6-a of the above SEM micrographs, we can clearly see the grain boundaries and the growth steps, and these features are significantly different for the implantation with Ti and with Pt.
Online since: February 2012
Authors: Yu Zeng Wang, Hui Sun, Ya Lin Li
Grain is broken or split the material processing process (natural or artificial) have been a group or a batch of the shape and volume which affects chemical properties such as has some common features in the granular content group [1].
Specific algorithm as follows: (1) after the treatment of the equilibrium of nonzero gray level number N to statistics, so as to achieve effective statistics of the actual degrees series.
We set that the number of gray value is M, the gray value is ranging from 0 ~ M-1, in this range we select t as gray value, divided the image into two groups calls G0 and G1, the gray value in G0 range from 0 ~ t pixel, the gray value in G1 range from t +1 ~ M-1 pixel, we use N to represent the total number of pixels, ni represent the number of the pixel whose the gray value is i.
Online since: June 2010
Authors: Kwang Geun Chin, Bruno C. De Cooman, Sang Won Lee, Jin Kyung Kim, Sung Kyu Kim
Fig. 1 Engineering stress-strain curves (a) showing serration due to dynamic strain aging, Ultimate tensile strength (b), yield strength (c) and number of serrations (d) for the 18Mn0.6C-N steel as function of nitrogen contents.
The mean grain size of both annealed steels was about 5µm.
The number of serrations measured by the number of abrupt changes in the slope of stress-strain 0 10 20 30 40 50 60 0 200 400 600 800 1000 1200 18Mn 0.6C 0.067N Stress (MPa) Strain (%) 12Mn 0.6C 0.061N (a) 40 45 50 55 (200) (101) 18Mn0.6C-0.067N Diffraction angle 2 ( ) Intensity 12Mn0.6C-0.061N (b) (100) (111) Fig. 2 Engineering stress-strain curves (a) and XRD diffraction patterns of fractured 12Mn0.6C-N steel and 18Mn0.067C-N steel (b). 0 10 20 30 40 50 60 70 0 200 400 600 800 1000 1200 0.067%N 0.086%N Stress (MPa) Strain (%) (a) N-free 1050 1080 1110 1140 390 410 430 450 0.00 0.02 0.04 0.06 0.08 280 360 440 520 Average (d) (c) YS (MPa) UTS (MPa) Number of serrations Nitrogen levels (%) N-free 0.067%N 0.086%N (b) Fig. 3 Scanning electron micrographs of annealed (a), (b) and fractured (c), (d) 12Mn0.6C-0.067N steel curves within the engineering strain range of 20% to 50% are given in Fig. 1(d).
Online since: August 2016
Authors: Fritz Klocke, Marco Kampka, Christoph Löpenhaus
The changing contact conditions result in a varying number of transmission points of the grinding force, which leads to a different tool load.
If the number of contact points located on the left and right flanks is even, a substantially uniform distribution of force is present.
If the number of contact points is odd, an uneven distribution of forces occurs and can lead to a characteristic profile-form deviation [1].
The number of contact points depends on workpiece normal module mn, number of teeth z, normal pressure angle αn and helix angle β as well as on the geometry and size of the grinding worm.
The hypothesis can be made that more sharp grains are used to machine the same material volume, which potentially results in a more effective cut with less friction and thus less power is consumed during grinding.
Online since: September 2013
Authors: Sarunya Promkotra
Grain size distributions are accomplished by using the sieve stack of 40, 60, 100, 200 mesh.
Other compressive test belongs to the prism set from the location number 2 and 6.
Total clay minerals has more distinctive up to 5% in fine stream sediment of sample number 6.
Fig. 6 Relationship of (a) compressive stress as a function of strain for the sample number 2 and 6, and broken features of a prism set of (b) sample number 2 and (c) sample number 6.
Online since: November 2014
Authors: Shun Yao Yang
The encrypted ciphertext is CT. 3) : use master key MK and utilize user’s attribute A to generate private key Sk. 4) : use private key Sk decrypting ciphertext CT to get plaintext M. 5) Three scheme designs 6) Suppose is P-order multiplicative group of large prime numbers.
Suppose and are the normal numbers, we can define as follows.
The experiment parameters of this paper are as following Table 1: Table 1 Experiment Parameters of the Simulation Initial Value Parameter Explanation Network N 90 Entity Number in Network Environment Environment Parameter M 270 Snapshot Number of Group Members Algorithm Parameter 0.4 Credible State Threshold Algorithm Parameter 0.6 Critical Credible State Threshold Suppose during the running state evaluation of the whole system, the computing nodes in the network environment are evaluated for times, of which the wrong evaluations are times (include two situations of evaluating non-credibility as credibility and vice versa).
Attribute basedencryptionfor fine-grained access control of encrypted data [DB /OL]. [2012-01-09]. http:/ /dl. acm. org/ci-tation. cfm?
ar-number = 4223236
Online since: December 2013
Authors: Guang Fu, Ying Jie Dong, Chao Wang
Fracture control reservoir function Through research fracture development and system partition and anatomy of the reservoir shows that the fracture on the formation of the reservoirs mainly the following two aspects Fracture provides migration conditions for oil and gas Early extend fracture make 1st member of Nantun group and the south 2nd member of Nantun group reservoir side joint The reservoir are mainly distributed in the early stretch near the early extend fracture in the south 2nd member of Nantun group horizon in South beier sag, and the more early stretch fracture number, the more oil well number.in the south 2nd member of Nantun group.This is because the south 2nd member of Nantun group reservoir above 1st member of Nantun group surcerock, multiple sets of mudstone layer between them apart,1st member of Nantun group surcerock generate oil through hard rock pore directly migrate into the south 2nd member of Nantun group reservoir, only connect 1st member of Nantun group surcerock
Long-term developmental fracture with conducting channel for the inversion of tectonic secondary hydrocarbon migration It can be seen from the figure 1, it has now been found near the reservoirs are mainly distributed in near the long-term development fracture in Damoguai group of South beier sag, and the more long-term developmental fracture number, the more oil well number.
Fig.1 Major rift zone secondary hydrocarbon reservoirs and inversion structure, long-term development relationship between fracture diagram of South Beier Sag Fracture provide shelter for oil-gas accumulation Reverse fault "back on" low uplift area is primary oil and gas gathering area Anatomy of the reservoir shows that antithetic faults block out and come into being "back on" low uplift area in the updip direction within the hydrocarbon generation subsags or close to hydrocarbon generation subsags tilted uplift and the top strata experiences a certain number of denudation due to rise.
Due to the influence of sediment grain size and lithology, sand body of the braided river delta front has high porosity and permeability.
Online since: October 2006
Authors: Andrey N. Dmitriev, V.I. Bulanov
Introduction As a technological operation, sintering has a quite unequivocal and well-defined purpose which is to impart the structure of a polycrystalline solid with a given porosity, a size of grains and a certain complex of physicomechanical and operational properties, particularly strengthening, to solids obtained preliminary under the effect of pressure from powders representing a conglomerate of powder particles almost not connected among themselves.
It is known that the predominant number of atoms in crystals of mixed dispersoid is located in units of a crystal lattice; other atoms are located in interstices.
Inside the crystals the ratio of the number of atoms of each sort taking place in units of the lattice to the number of atoms in interstices should be constant, i.e. at transition of some number of atoms from units to interstices the same quantity of atoms should pass from interstice to units of the lattice, and thermodynamic equilibrium of this process depends on temperature.
The definition of time of homogenization at sintering has been undertaken earlier [1-4] without considering a number of factors and without deducing the equation "time of sintering (t) as a function of the determined physical factor - diffusion coefficient (D)".
Online since: April 2012
Authors: K.A. Zakaria, Mariyam Jameelah Ghazali, S. Abdullah, C.H. Azhari
Fig. 6 exhibit the number of cycles to failure for all tests performed at the maximum and minimum testing temperatures, i.e. 27 °C and 250 °C.
It is also noticed that the number of cycle to failure for low to high spectrum loading is about 56 % higher than the CAL for the fatigue test performed at 27 °C.
Meanwhile, the number of cycle to failure for low to high spectrum loading is about 7 % higher than the CAL for the fatigue test performed at 250 °C.
Relative elements present in laboratory air absorbed onto the surface cause embrittlement of the grain boundary, which contributes to the reduction in fatigue resistance experienced at the elevated temperatures [11].
Besides that, the number of cycles to failures was reduced significantly with the increased of temperature.
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