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Online since: October 2004
Authors: Xiao Bao Chen, Hong Wang Ma, Hua Fu Chen
So reduction factor vR can be obtained
y
vR αα/=
(4) According to the relationship between the reduction factor and the ductility factor [5], the ductility factor for a structure under the severe earthquake can be obtained as > − + ≤ − + = n V n nV TT R TT TTR * 053.1 *053.1* )]1(74.0[1 ]/)1(74.0[1 µ
Two PC frames (sketch of frame as Fig. 2) are taken as analysis examples, data are listed in Table 2.
PEER-1999/02, Pacific Earthquake Engineering Research Center College of Engineering, (University of California, Berkeley, 1999) [5] Peter Fajfar: A nonlinear analysis method for performance-based seismic design, 16(3), (Earthquake Spectra, 2000), p. 573~592 Table 2 Analysis data about response of frames under the severe earthquake Frame *T yu [cm] yα α VR µ * su [cm] 1Γ su uu [cm] A 0.8 6.5 0.4 0.496 1.24 1.16 7.54 1.297 9.78 32.3 B 0.8 6.82 0.434 0.496 1.144 1.095 7.468 1.28 9.59 27.1 Side Disp.
(4) According to the relationship between the reduction factor and the ductility factor [5], the ductility factor for a structure under the severe earthquake can be obtained as > − + ≤ − + = n V n nV TT R TT TTR * 053.1 *053.1* )]1(74.0[1 ]/)1(74.0[1 µ
Two PC frames (sketch of frame as Fig. 2) are taken as analysis examples, data are listed in Table 2.
PEER-1999/02, Pacific Earthquake Engineering Research Center College of Engineering, (University of California, Berkeley, 1999) [5] Peter Fajfar: A nonlinear analysis method for performance-based seismic design, 16(3), (Earthquake Spectra, 2000), p. 573~592 Table 2 Analysis data about response of frames under the severe earthquake Frame *T yu [cm] yα α VR µ * su [cm] 1Γ su uu [cm] A 0.8 6.5 0.4 0.496 1.24 1.16 7.54 1.297 9.78 32.3 B 0.8 6.82 0.434 0.496 1.144 1.095 7.468 1.28 9.59 27.1 Side Disp.
Online since: August 2014
Authors: Wei Dong Liu, Yun Hong Ding, Jin Chang, Ke Xu
Through sub-critical water modification, macromolecular compounded into smaller molecules to reduce viscosity and improved heavy oil exploitation effectively.
2.3 Catalytic modification
Although the thermal cracking can reduce the viscosity of heavy oil , the viscosity reduction rate is only about 21.5% , which is still far from industrial exploitation of viscosity requirements , requiring additional catalyst for heavy oil catalytic modification.
However, water only provide a small amount of hydrogen ions, the amount of viscosity reduction required is enormous, so hydrogen donor was studied to increase the supply of hydrogen ions.
Table 2 Comparative measured data of Crude oil and thermal recovery Elements Crude oil TM SWM CM CMH Molecular Weight 528 532 476 316 208 20˚CDensity,g/mL 0.9738 0.9760 0.9402 0.9393 0.8725 50˚CViscosity,mPa·S 2740 2920 2150 1390 780 four componens analyst % saturates 37.53 37.84 39.27 44.21 48.35 aromatics 14.28 14.52 15.94 24.63 33.66 resins 46.72 45.89 43.56 30.59 17.65 asphaltenes 1.47 1.75 1.23 0.57 0.34 Elements analyst wt% C 86.93 87.70 86.68 86.21 85.76 H 11.45 11.40 12.23 12.78 13.80 S 0.39 0.38 0.08 0.04 0.01 N 0.72 0.72 0.61 0.60 0.30 O 0.51 0.50 0.40 0.37 0.13 As can be seen from Table 2: (1) After Chengbei heavy oil thermal modification(TM), the average molecular weight increased, after sub-critical water modification(SWM), Catalytic modification(CM) and Catalytic modification with hydrogen donor(CMH), the average molecular weight decreased, indicating the main directions of TM carrying out condensation reaction , SWM, CM, and CMH getting fission
Table 3 Comparative Structural parameters data of Crude oil and thermal recovery Elements Crude oil TM SWM CM CMH H/C 1.5801 1.5619 1.6818 1.7670 1.9181 CT 38.2174 38.5378 34.3544 22.6830 14.8527 HT 60.4560 60.6480 58.2148 40.3848 28.704 fA 0.2198 0.2368 0.1554 0.0996 0.0059 fN 0.3338 0.2976 0.3193 0.4049 0.52098 fP 0.4464 0.4654 0.5253 0.4955 0.4731 RT 4.7893 4.6497 3.5772 2.3608 1.4565 RA 1.6000 1.7821 0.8349 0.0649 -0.4779 RN 3.1893 2.8677 2.7423 2.2959 1.93448 RA/ RN 0.5017 0.6214 0.3045 0.0283 -0.2471 CI 0.2002 0.2012 0.1627 0.1333 0.0760 As can be seen from Table 3: (1) The H / C in SWM, CM and CMH increased, which described heavy chain scission reaction taking place in the hydrogenation of the modified process, and macromolecules asphaltenes ,resins and other heavy components significantly reducing to low levels , hydrogen donor rising activity of free radicals , increasing the cracking and preventing coking
However, water only provide a small amount of hydrogen ions, the amount of viscosity reduction required is enormous, so hydrogen donor was studied to increase the supply of hydrogen ions.
Table 2 Comparative measured data of Crude oil and thermal recovery Elements Crude oil TM SWM CM CMH Molecular Weight 528 532 476 316 208 20˚CDensity,g/mL 0.9738 0.9760 0.9402 0.9393 0.8725 50˚CViscosity,mPa·S 2740 2920 2150 1390 780 four componens analyst % saturates 37.53 37.84 39.27 44.21 48.35 aromatics 14.28 14.52 15.94 24.63 33.66 resins 46.72 45.89 43.56 30.59 17.65 asphaltenes 1.47 1.75 1.23 0.57 0.34 Elements analyst wt% C 86.93 87.70 86.68 86.21 85.76 H 11.45 11.40 12.23 12.78 13.80 S 0.39 0.38 0.08 0.04 0.01 N 0.72 0.72 0.61 0.60 0.30 O 0.51 0.50 0.40 0.37 0.13 As can be seen from Table 2: (1) After Chengbei heavy oil thermal modification(TM), the average molecular weight increased, after sub-critical water modification(SWM), Catalytic modification(CM) and Catalytic modification with hydrogen donor(CMH), the average molecular weight decreased, indicating the main directions of TM carrying out condensation reaction , SWM, CM, and CMH getting fission
Table 3 Comparative Structural parameters data of Crude oil and thermal recovery Elements Crude oil TM SWM CM CMH H/C 1.5801 1.5619 1.6818 1.7670 1.9181 CT 38.2174 38.5378 34.3544 22.6830 14.8527 HT 60.4560 60.6480 58.2148 40.3848 28.704 fA 0.2198 0.2368 0.1554 0.0996 0.0059 fN 0.3338 0.2976 0.3193 0.4049 0.52098 fP 0.4464 0.4654 0.5253 0.4955 0.4731 RT 4.7893 4.6497 3.5772 2.3608 1.4565 RA 1.6000 1.7821 0.8349 0.0649 -0.4779 RN 3.1893 2.8677 2.7423 2.2959 1.93448 RA/ RN 0.5017 0.6214 0.3045 0.0283 -0.2471 CI 0.2002 0.2012 0.1627 0.1333 0.0760 As can be seen from Table 3: (1) The H / C in SWM, CM and CMH increased, which described heavy chain scission reaction taking place in the hydrogenation of the modified process, and macromolecules asphaltenes ,resins and other heavy components significantly reducing to low levels , hydrogen donor rising activity of free radicals , increasing the cracking and preventing coking
Online since: July 2013
Authors: Thomas Pretorius, Kirill Khlopkov, Georg Paul
Introduction
Modern high performance steels such as high-strength IF (HX) steels for stretch-forming and deep-drawing processes or advanced high strength steels (AHSS) are well established materials for automotive body in white weight reduction and safety improvement [1].
Experimental Details The experimental data of softening kinetics have been measured using a MMC deformation dilatometer and a Bähr deformation dilatometer of type DIL 805 D over the last decade [8, 9].
In order to evaluate the softening kinetics from stress-strain curves the off-set method with the reference strain of 0,01 (1% of height reduction) has been used.
Based on our own experimental kinetics data of static recrystallization for 20 different steels, the following modeling parameters have been derived (Table 1).
Experimental Details The experimental data of softening kinetics have been measured using a MMC deformation dilatometer and a Bähr deformation dilatometer of type DIL 805 D over the last decade [8, 9].
In order to evaluate the softening kinetics from stress-strain curves the off-set method with the reference strain of 0,01 (1% of height reduction) has been used.
Based on our own experimental kinetics data of static recrystallization for 20 different steels, the following modeling parameters have been derived (Table 1).
Online since: September 2024
Authors: Yan Chao Sun, Wen Hui Liu, Ta Na Bao, Altan Bolag
As the particles of the material become smaller, the path of the X-rays through the material becomes more complex, resulting in a reduction in the intensity of the diffracted beam.
In addition, the smaller the particle size of the material, the greater its surface area to volume ratio, which also leads to a reduction in the intensity of the diffracted beam.
Brunauer–Emmett–Teller (BET) curve and the pore size distribution of the AQ/SBA-15 composites are shown in Fig. 4, the corresponding data are listed in Table 2.
Rate capability data.
In addition, the smaller the particle size of the material, the greater its surface area to volume ratio, which also leads to a reduction in the intensity of the diffracted beam.
Brunauer–Emmett–Teller (BET) curve and the pore size distribution of the AQ/SBA-15 composites are shown in Fig. 4, the corresponding data are listed in Table 2.
Rate capability data.
Online since: July 2015
Authors: Han Ju Park, Jae Kyoo Lim, Hee Yong Kang, Gin Ho Kim, Yong Gon Lee, Cheol Min Yang, Myung Goo Hwang
Table 3 is a tensile strength data about comparative analysis in accordance with the fiber length in parent and weld.
When the weld specimens mixed short carbon fibers with 1mm-15wt.% compared to the parent, it showed a 79% reduction in tensile strength.
In the specimens of 3mm-15wt.% it is a relatively small reduction of 61% in tensile strength.
Table 5-2 is a data that 0~0.05mm (50μ) is 51-53% level, 0.05~0.09mm (90μ) is 20-21% level, 0.09~0.18mm (180μ) appeared as 18-20% level.
When the weld specimens mixed short carbon fibers with 1mm-15wt.% compared to the parent, it showed a 79% reduction in tensile strength.
In the specimens of 3mm-15wt.% it is a relatively small reduction of 61% in tensile strength.
Table 5-2 is a data that 0~0.05mm (50μ) is 51-53% level, 0.05~0.09mm (90μ) is 20-21% level, 0.09~0.18mm (180μ) appeared as 18-20% level.
Online since: September 2008
Authors: Chris R. Bowen, Vitaly Yu. Topolov, K.V.S. Raman
Examination of the experimental data for pure BT (mFC = 1) suggests that the )(
3BT
jd and σε ),(
33
BT values
of the BT ceramic incorporated in the composites in this work agree with the similar constants
calculated using the self-consistent method for lgγ = -1.5, i.e. the mobility of the 90° domain walls
is relatively low.
The presence of porosity in the BT ceramic results in a small reduction in *3 jd but leads to a larger reduction in the permittivity.
The role of the stiff HA matrix in the layer of the first type is also observed by considering the piezoelectric anisotropy *33d / * 31d of the HA / BT composite (compare data from Figs. 2 a and b).
The presence of porosity in the BT ceramic results in a small reduction in *3 jd but leads to a larger reduction in the permittivity.
The role of the stiff HA matrix in the layer of the first type is also observed by considering the piezoelectric anisotropy *33d / * 31d of the HA / BT composite (compare data from Figs. 2 a and b).
Online since: July 2013
Authors: Yong Wang, Hong Jiao Qiao, Wei Shen, Teng Zhang
The six components of the hammer-type shredder are rotary feed bin device, flexible reduction drive device, spindle drive device, upper frame and supporting structure, lower frame and fence lifting structure and door structure.
The rotary feed bin device, whose speed can be controlled in the range of 3-8r/min, is driven by flexible reduction drive device. 88 movable hammer tablets are installed on the main shaft of the spindle drive device to cut up crops straw.
Through collection, weighing and calculation of the experiment data, the orthogonal test results are obtained as shown in table 1.
According to the rounded data above, the actual effective area of hydraulic cylinder can be obtained as follows: , And the highest pressure of system working cycle can be calculated as follows: Protocol Diagram of Hydraulic Principle.
The rotary feed bin device, whose speed can be controlled in the range of 3-8r/min, is driven by flexible reduction drive device. 88 movable hammer tablets are installed on the main shaft of the spindle drive device to cut up crops straw.
Through collection, weighing and calculation of the experiment data, the orthogonal test results are obtained as shown in table 1.
According to the rounded data above, the actual effective area of hydraulic cylinder can be obtained as follows: , And the highest pressure of system working cycle can be calculated as follows: Protocol Diagram of Hydraulic Principle.
Online since: December 2012
Authors: Min Na Ni, Qing Zhang Lv, Ping Jin
With some computation made on the data obtained by assessing the importance of design factors, the significance of customer needs can be determined, which serves as a crucial basis for the extraction of design factors.
The customer needs is made clear by analyzing customer behaviors and their living environment based on the data collected in a survey, which involves 200 interviewed customers.
Reduction on complicated carving ornamentation 8.
Details of the importance of consumer needs Customer Needs Importance Score Consistency with the environment around villa 5 Suitability for high-end residential in Shanghai 5 Conveying the sense of delicacy 4 Emphasis on details 4 Indicating the owner’s social status 4 Balance between classical beauty and the sense of modernity 5 Easiness of Cleaning 3 Light not Dazzling 2 The analysis on positive and negative correlation between design characteristics suggests that a part of the customer needs are positive correlated with design characteristics, such as ‘concise modeling’, ‘ball, cone and thin cylinder shaped main lamp axis’ , ‘condensed carved patterns through single-line curves’ and ‘reduction on complicated carving ornamentation’.
The customer needs is made clear by analyzing customer behaviors and their living environment based on the data collected in a survey, which involves 200 interviewed customers.
Reduction on complicated carving ornamentation 8.
Details of the importance of consumer needs Customer Needs Importance Score Consistency with the environment around villa 5 Suitability for high-end residential in Shanghai 5 Conveying the sense of delicacy 4 Emphasis on details 4 Indicating the owner’s social status 4 Balance between classical beauty and the sense of modernity 5 Easiness of Cleaning 3 Light not Dazzling 2 The analysis on positive and negative correlation between design characteristics suggests that a part of the customer needs are positive correlated with design characteristics, such as ‘concise modeling’, ‘ball, cone and thin cylinder shaped main lamp axis’ , ‘condensed carved patterns through single-line curves’ and ‘reduction on complicated carving ornamentation’.
Online since: September 2012
Authors: Rui Li, Cheng Xuan Xiang, Hua Qing Wang
As the system includes a computer with dedicated software, it is possible to merge the data from Lock-in and FFT (Fast Fourier Transform) measurements and display data over a wide range of frequencies.
However, the area of the catholic peak of the sample D is the largest of the three zinc electrodes after the reduction reaction took place.
This is in front of CV performance analysis of the sample D with better and more reversible oxidation and reduction of the discharge capacity of the line.
However, the area of the catholic peak of the sample D is the largest of the three zinc electrodes after the reduction reaction took place.
This is in front of CV performance analysis of the sample D with better and more reversible oxidation and reduction of the discharge capacity of the line.
Online since: May 2015
Authors: Marian Gheorghe, Daniel Morel, Andreea Mădălina Ene Căscătău
Heat (c), Thermal Conductivity (λ), Emissivity Coefficient (ε)
ρ
[kg/m3]
H
[HB]
E
[N/mm2]
υ
Rp 0.2%
[N/mm2]
Rm
[N/mm2]
c
[kJ/kgK]
λ
[W/mK]
ε
(at 900 -1100°C)
7800
132
210
0.3
min 360 / min 355
690 – 900 / 470 - 630
0.63
43
0.55 - 0.61
Prescribed geometrical characteristics [7]
ARB
LB, RB
ARBA
d1
d2
e
f
g
h
a
b
c
α*
Φ24.6
Φ19.7
68.8
21.9
49
26
4.5 ± 0.1,
2.5 ± 0.1
3.5
± 0.5
1067.5
± 0.7
± 1
[mm]
[ º]
*The α characteristic defines the relative angular position, around y axis, between LB
and RB, and this is admitted to be expressed by the angular position of the symetry plane of RS1 and RS2 side surfaces relative to the symetry plane of LS1 and LS2 side surfaces, the last one being the reference base (A)
Welds /
LW, RW
characteristics
[8, 9]
Angular length
Gene- ration
Rp 0.2%
[N/mm2]
Rm
[N/mm2]
Elongation 5%,
δ [%]
362 º
Push type
min 420
500 - 640
min 20
Effective Dimensional Characteristics, Dependent Variables and Independent Variables
Based on the data
The data analysis reveals important findings, among the following are outlined.
• The brackets thickness, a, is a strong significant product factor/ independent variable, and this is proved by the fact that the reduction of a with 44 % (see C3 vs.
• The welding speed, S, is a significant process factor/ independent variable, and this is proved by the fact that the reduction of S with 33 % (see C2 vs.
The data analysis reveals important findings, among the following are outlined.
• The brackets thickness, a, is a strong significant product factor/ independent variable, and this is proved by the fact that the reduction of a with 44 % (see C3 vs.
• The welding speed, S, is a significant process factor/ independent variable, and this is proved by the fact that the reduction of S with 33 % (see C2 vs.