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Online since: December 2012
Authors: Guo Ming Liu, Lei Zhang, Zhi Ping Li
Chalk Department of particles holes and grain dissolution porosity, an average of 53.2%, followed by argillaceous porous and contraction joints, while a small number of particles dissolved pore, showing a small amount of paste particles seam and tensile crack; Jurassic inter-granular holes and intra-granular dissolution porosity is developed, accounting for the porosity as high as 95%, while a small amount of argillaceous porous and granulizing hole and a very small amount of mold holes.
Online since: February 2011
Authors: Si Bo Ding
(Liu [3])An uncertain variable is a measurable function from an uncertainty space (,,) to the set of real numbers, i.e., for any Borel set B of real numbers, the set is an event.
(Liu [3]) The uncertainty distribution Φ of an uncertain variable is defined by for any real number .
Constraint (4) states that the number of servers to be located is equal to p.
Repeat the second to sixth steps a given number of cycles.
Acknowledgment This work was supported by Soft Science Research of China State Administration of Grain Grant No.72, Humanities and Social Sciences Research of Henan Province Grant No. 2009-QN-023 and Talents Cultivation Fund of Henan University of Technology Grant No. 2009BS023.
(Liu [3]) The uncertainty distribution Φ of an uncertain variable is defined by for any real number .
Constraint (4) states that the number of servers to be located is equal to p.
Repeat the second to sixth steps a given number of cycles.
Acknowledgment This work was supported by Soft Science Research of China State Administration of Grain Grant No.72, Humanities and Social Sciences Research of Henan Province Grant No. 2009-QN-023 and Talents Cultivation Fund of Henan University of Technology Grant No. 2009BS023.
Online since: March 2020
Authors: Yasuji Shimizu, Takashi Uno, Fuminori Sugaya, Takushi Toyooka, Katsuro Shimizu
Introduction
A large number of triangle-rimmed deity and beast mirrors were buried alongside people as personal belongings in early Kofun burial mounds, and a large number made from the same mold have been excavated.
A number of mirror molds from the Former Han Period (between 206 B.C. and 8 A.D.) have been excavated from Linzi District in Shandong Province, China.
These examples mainly include grass-blade pattern mirrors that were produced from strong clay molds mistaken for stone using uniform, relatively fine-grained real clay taken from the outside part of the mold onto the mold face.
This paper was written with support from a number of individuals and organizations to whom I would like to express my deepest gratitude.
[4] Numerals in brackets following “triangle-rimmed deity and beast mirror” are catalog numbers and correspond to the Triangle-Rimmed Deity and Beast Mirror Research Encyclopedia.” [5] [5] Shimogaki,H.
A number of mirror molds from the Former Han Period (between 206 B.C. and 8 A.D.) have been excavated from Linzi District in Shandong Province, China.
These examples mainly include grass-blade pattern mirrors that were produced from strong clay molds mistaken for stone using uniform, relatively fine-grained real clay taken from the outside part of the mold onto the mold face.
This paper was written with support from a number of individuals and organizations to whom I would like to express my deepest gratitude.
[4] Numerals in brackets following “triangle-rimmed deity and beast mirror” are catalog numbers and correspond to the Triangle-Rimmed Deity and Beast Mirror Research Encyclopedia.” [5] [5] Shimogaki,H.
Online since: September 2012
Authors: Na Na Gong, Hai Yan Wu
Centroid location is a range-free and coarse-grained algorithm for outdoor.
(2) Amount of computation: To note the number of beacon nodes k doesn’t increase the amount of computation.
When the number of beacon nodes increases, the AE decreases(Fig.7).
Because of the cumulative errors, when the number of unknown nodes increases, the AE increases(Fig. 8).
AE with increasing number of beacon nodes(radio range=25) Figure 8.
(2) Amount of computation: To note the number of beacon nodes k doesn’t increase the amount of computation.
When the number of beacon nodes increases, the AE decreases(Fig.7).
Because of the cumulative errors, when the number of unknown nodes increases, the AE increases(Fig. 8).
AE with increasing number of beacon nodes(radio range=25) Figure 8.
Online since: August 2021
Authors: Vasiliy S. Rudnov, Ekaterina S. Gerasimova, Rufina F. Fakhertdinova
One of the ways to solve a number of these problems is the use of fiber-reinforced concretes, but for this it is necessary to experimentally identify the deformation and strength characteristics of dispersed reinforced concretes and take it into account when calculating structures.
A scientific team of the Institute of New Materials and Technologies of the Ural Federal University is engaged in solving of this research task, which will expand a number of construction opportunities while maintaining economic feasibility in the future.
This reinforcement method has a number of disadvantages, for example, the formation of structure inhomogeneities, voids, which reduces the operational characteristics of finished products [3, 4].
Klyuyev, Experimental researches of fine-grained concrete constructions, Structural Mechanics of Engineering Constructions and Buildings. 4 (2011) 71-74
A scientific team of the Institute of New Materials and Technologies of the Ural Federal University is engaged in solving of this research task, which will expand a number of construction opportunities while maintaining economic feasibility in the future.
This reinforcement method has a number of disadvantages, for example, the formation of structure inhomogeneities, voids, which reduces the operational characteristics of finished products [3, 4].
Klyuyev, Experimental researches of fine-grained concrete constructions, Structural Mechanics of Engineering Constructions and Buildings. 4 (2011) 71-74
Online since: February 2020
Authors: Aleksandar Sedmak, Zoran Radaković, Simon Sedmak, Aleksandar Grbović
Structural integrity and life of welded joints made of a micro-alloyed low-carbon fine-grained normalised high strength pressure vessel steel, P460NL1 is presented [1].
For this purpose, a number of specimens were tested via bending moment applied to them, using RUMUL Fractomat 7609/213 device, at the Military Technical Institute in Belgrade, Serbia.
While these results were correlated to a number of other factors, as described in [1], here the main focus will on da/dN-ΔK curves, which were used to determine C and m values.
In the following section, the stress intensity factors and the a-N (crack length vs. the number of cycles) for specimens 5 HAZ (figure 6) and 22 WM (figure 7) will be shown.
Crack length vs. number of cycles curve (left) and stress intensity factors (right), model 5 HAZ Figure 7.
For this purpose, a number of specimens were tested via bending moment applied to them, using RUMUL Fractomat 7609/213 device, at the Military Technical Institute in Belgrade, Serbia.
While these results were correlated to a number of other factors, as described in [1], here the main focus will on da/dN-ΔK curves, which were used to determine C and m values.
In the following section, the stress intensity factors and the a-N (crack length vs. the number of cycles) for specimens 5 HAZ (figure 6) and 22 WM (figure 7) will be shown.
Crack length vs. number of cycles curve (left) and stress intensity factors (right), model 5 HAZ Figure 7.
Online since: November 2010
Authors: Yi Min Zhu, Guo Liang Liu, Zhi Jun Ma, Xin Fang
Fig. 1 Relationship between grain size and lattice constant
From Fig 1 it is shown that lattice constants increased with the decrease of particle sizes.
The shift essence of infrared spectrum absorption peaks is attribute to the change of molecule vibration frequency, and the magnitude of molecule vibration frequency ν%(shown by wave number) is expressed by formula (2)
If the number of atomic in boundary far less than internal, the main characteristic of the crystal is mainly depend on internal atomic, so it can be seen as a non-boundary system.
Fig. 7 indicates that the change of vibration wave number when the internal “force constant k2” stay the same of 75 and the external force constant changes constantly, therein green stands for σ1, black stands for σ2, blue stands for σ3, red stands for σ4.
Fig. 8 Relationship between k2 and wavenumber of magnesia(k1=75) (green σ1, black , blue σ3, red σ4) Fig. 8 shows that the change of vibration wave number when the external“force constant k1”stays the same of 75 and the internal force constant changes continually, green stands for σ3, black stands for σ1, blue stands for σ4, red stands for σ2.
The shift essence of infrared spectrum absorption peaks is attribute to the change of molecule vibration frequency, and the magnitude of molecule vibration frequency ν%(shown by wave number) is expressed by formula (2)
If the number of atomic in boundary far less than internal, the main characteristic of the crystal is mainly depend on internal atomic, so it can be seen as a non-boundary system.
Fig. 7 indicates that the change of vibration wave number when the internal “force constant k2” stay the same of 75 and the external force constant changes constantly, therein green stands for σ1, black stands for σ2, blue stands for σ3, red stands for σ4.
Fig. 8 Relationship between k2 and wavenumber of magnesia(k1=75) (green σ1, black , blue σ3, red σ4) Fig. 8 shows that the change of vibration wave number when the external“force constant k1”stays the same of 75 and the internal force constant changes continually, green stands for σ3, black stands for σ1, blue stands for σ4, red stands for σ2.
Online since: July 2015
Authors: Alexander Belyaev, Vladimir Polyanskiy, Yuriy A. Yakovlev
The parameter is determined in terms of the material properties which are crystal grain surface area and crystal boundary volume.
In terms of the Young’s moduli the constitutive equation for the axial deformation is given by Here is the total number of particles in elementary volume, denotes the number of the particles connected by virgin bonds, is the number of hydrogen particles attached to a lattice.
The number of the lattice-settled hydrogen particles depends on the stress state of the lattice at every point and, generally, on time.
Despite the seeming simplicity of this approach and the large number of published data, not all of them can be used for the approximation.
Wokulski, Effect of hydrogen charging on stress-strain curves for iron whiskers, Acta Metallurgica, V. 30, I. 12, 1982, p. 2173-2179 [21] Yihong Nie, Yuuji Kimura,Tadanobu Inoue, Fuxing Yin, Eiji Akiyama,Kaneaki Tsuzaki,Hydrogen Embrittlement of a 1500-MPa Tensile Strength Level Steel with an Ultrafine Elongated Grain, Metallurgical and Materials Trans.
In terms of the Young’s moduli the constitutive equation for the axial deformation is given by Here is the total number of particles in elementary volume, denotes the number of the particles connected by virgin bonds, is the number of hydrogen particles attached to a lattice.
The number of the lattice-settled hydrogen particles depends on the stress state of the lattice at every point and, generally, on time.
Despite the seeming simplicity of this approach and the large number of published data, not all of them can be used for the approximation.
Wokulski, Effect of hydrogen charging on stress-strain curves for iron whiskers, Acta Metallurgica, V. 30, I. 12, 1982, p. 2173-2179 [21] Yihong Nie, Yuuji Kimura,Tadanobu Inoue, Fuxing Yin, Eiji Akiyama,Kaneaki Tsuzaki,Hydrogen Embrittlement of a 1500-MPa Tensile Strength Level Steel with an Ultrafine Elongated Grain, Metallurgical and Materials Trans.
Online since: July 2006
Authors: Warren J. Poole, F. Fazeli, Chad W. Sinclair
After this transient a number of important features can be highlighted:
• For the solution treated and overaged samples an apparent saddle region is observed in Fig. 2(a)
and 2(b) at strain values smaller than 3%
Linear summation, i.e. n =1 holds for the situations where a high density of weak obstacles and a small number of strong obstacles co-exist, e.g. the initial stages of aging featuring a large number of shearable precipitates.
At higher stress levels a number of relaxation processes, e.g. formation and glide of prismatic dislocation loops [10], become potentially active thereby affecting the average storage rate of dislocations due to the particles.
Fig. 3(a) and 3(b) show the surface of the exposed grains for the peak and overaged samples, respectively.
In Fig. 3(a), one can observe a series of parallel slip lines in most grains (usually dominated by a single orientation).
Linear summation, i.e. n =1 holds for the situations where a high density of weak obstacles and a small number of strong obstacles co-exist, e.g. the initial stages of aging featuring a large number of shearable precipitates.
At higher stress levels a number of relaxation processes, e.g. formation and glide of prismatic dislocation loops [10], become potentially active thereby affecting the average storage rate of dislocations due to the particles.
Fig. 3(a) and 3(b) show the surface of the exposed grains for the peak and overaged samples, respectively.
In Fig. 3(a), one can observe a series of parallel slip lines in most grains (usually dominated by a single orientation).
Online since: October 2011
Authors: Vinod Yadava, S. K. S. Yadav
The work piece is thus simultaneously subject to heating due to electrical sparks occurring between the metal bonded grinding wheel and the work piece, and abrasion by diamond grains.
The projection of diamond grain on the bonding material of wheel is called protrusion height and gap between the work piece and bonding material is called gap width.
The quality characteristics measured are MRR and ASR Table 1 Selection of controllable factors and their levels Symbol Factors Units Level 1 2 3 A Current Amp. 3 5 7 B Pulse-on time μs 50 100 150 C Duty Factor - 0.526 0.660 0.704 D Wheel RPM - 700 1000 1300 Selection of Orthogonal Array for experimentation In the present case four parameters taken at three different levels assuming no interaction between factors, the total degree of freedom (dof) has been calculated by using the following formula: dof = (number of levels-1) for each factor + (number of levels -1) (number of levels -1) for each interaction +1,so that the dof = (3 - 1) × 4 + 1 = 9 [3].Selection of the orthogonal array is based on the calculation of the degree of freedom of all the factors.
For Smaller-the-better type problem MSD = ( y12 +y22 +y33+…….)/ n Table 2 Experimental observations using L9 Taguchi Orthogonal Arrey MRR ASR 0.00236 1.33 0.01192 1.02 0.0210 1.41 0.0172 0.96 0.00785 1.24 0.0148 1.18 0.0186 1.41 0.0199 0.94 0.0059 2.84 and for Higher-the-better type problem MSD = ( 1/y12 +1/y22 +1/y33+…….)/ n where, y1,y2,y3,………………yn are results of the experiments and n is the number of repetitions of yi.
The TNQL can be identified using If the wi represents the weighting factor for the ith quality feature, q is the number of quality features and yij is the loss function associated with the ith quality features at the jth trial conditions.
The projection of diamond grain on the bonding material of wheel is called protrusion height and gap between the work piece and bonding material is called gap width.
The quality characteristics measured are MRR and ASR Table 1 Selection of controllable factors and their levels Symbol Factors Units Level 1 2 3 A Current Amp. 3 5 7 B Pulse-on time μs 50 100 150 C Duty Factor - 0.526 0.660 0.704 D Wheel RPM - 700 1000 1300 Selection of Orthogonal Array for experimentation In the present case four parameters taken at three different levels assuming no interaction between factors, the total degree of freedom (dof) has been calculated by using the following formula: dof = (number of levels-1) for each factor + (number of levels -1) (number of levels -1) for each interaction +1,so that the dof = (3 - 1) × 4 + 1 = 9 [3].Selection of the orthogonal array is based on the calculation of the degree of freedom of all the factors.
For Smaller-the-better type problem MSD = ( y12 +y22 +y33+…….)/ n Table 2 Experimental observations using L9 Taguchi Orthogonal Arrey MRR ASR 0.00236 1.33 0.01192 1.02 0.0210 1.41 0.0172 0.96 0.00785 1.24 0.0148 1.18 0.0186 1.41 0.0199 0.94 0.0059 2.84 and for Higher-the-better type problem MSD = ( 1/y12 +1/y22 +1/y33+…….)/ n where, y1,y2,y3,………………yn are results of the experiments and n is the number of repetitions of yi.
The TNQL can be identified using If the wi represents the weighting factor for the ith quality feature, q is the number of quality features and yij is the loss function associated with the ith quality features at the jth trial conditions.