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Online since: January 2012
Authors: Zhu Feng Xu, Bing Hou, Xiao Lin Zhang, Peng Cheng Du
For L2C signal, as shown in Fig.1, the navigation message is a 25 bps data stream which is coded by a rate 1/2 convolutional coder.
Fig.1 Block diagram of L2C signal structure.
Fig.6 shows the 3D plot of C/A code acquisition, max at (479,19) means the code phase difference and the Doppler frequency offset are 479 chips and 3KHz (500Hz×(19-13)) at the maximum correlation peak.
Then 20 possible initial phases of CM code can be calculated as 479+i×1023, i=1:20.
The correlation peak is the 9th, so the initial phase of CM code is 9686 (479+9×1023).
Fig.1 Block diagram of L2C signal structure.
Fig.6 shows the 3D plot of C/A code acquisition, max at (479,19) means the code phase difference and the Doppler frequency offset are 479 chips and 3KHz (500Hz×(19-13)) at the maximum correlation peak.
Then 20 possible initial phases of CM code can be calculated as 479+i×1023, i=1:20.
The correlation peak is the 9th, so the initial phase of CM code is 9686 (479+9×1023).
Online since: December 2012
Authors: Parames Kamhangrittirong, Korakot Amornworawit, Barames Vardhanabhuti
Fig. 1 Grain size distribution of kaolinite clay and burning shell
Sample preparation
Five mixing ratios (kaolinitic clay : burning shell) by weight were prepared including 1:0.6, 1:0.8, 1:1, 1:1.3 and 1:1.6.
The result shows that the specimen temperature steady increased and reached about 440 oC to 479 oC after it was exposed to the heat temperature of 1,100 oC for about 15 minutes.
By subjecting the specimen to the heat of 1,100 oC, the specimen temperature reaches 440 oC to 479 oC within about 15 minutes and remains constant.
References [1] J.
Vol. 479-481 (2012), p. 357 [20] M.W.
The result shows that the specimen temperature steady increased and reached about 440 oC to 479 oC after it was exposed to the heat temperature of 1,100 oC for about 15 minutes.
By subjecting the specimen to the heat of 1,100 oC, the specimen temperature reaches 440 oC to 479 oC within about 15 minutes and remains constant.
References [1] J.
Vol. 479-481 (2012), p. 357 [20] M.W.
Online since: August 2007
Authors: Sung Hak Lee, Jee Hoon Ahn, Eun Pil Song, Nack Kim
%TiO2 coatings sprayed with the CPSP of 361, 427,
479, and 574 are referred to as 'A1', 'A2', 'A3', and 'A4', respectively.
%TiO2 coatings are shown in Figs. 1(a) and (b).
Table 1.
Volume Fraction (%) CPSP α-Al2O3 Partially Melted Region Pore Coating Thickness (µm) Bulk Density (g/cm3) 361 17.1 25.3 7.19 320 3.22 427 12.8 19.5 6.93 320 3.10 479 10.2 15.1 6.29 390 3.31 574 6.4 8.6 5.02 340 3.23 Fig. 1.
References [1] L.
%TiO2 coatings are shown in Figs. 1(a) and (b).
Table 1.
Volume Fraction (%) CPSP α-Al2O3 Partially Melted Region Pore Coating Thickness (µm) Bulk Density (g/cm3) 361 17.1 25.3 7.19 320 3.22 427 12.8 19.5 6.93 320 3.10 479 10.2 15.1 6.29 390 3.31 574 6.4 8.6 5.02 340 3.23 Fig. 1.
References [1] L.
Online since: October 2006
Authors: A. Paul, A.A. Kodentsov, F.J.J. van Loo
The results of these
calculations are summarized in Table 1.
Table 1.
This microstructural feature is now understood as a manifestation of the Kirkendall effect [1].
The average compositions of the reaction products were calculated as Ag0.154Zn0.846 for the ε"AgZn3" phase, Ag0.394Zn0.606 for the γ-"Ag5Zn8" and Ag0.521Zn0.479 for the β-"AgZn" phase.
References [1] A.
Table 1.
This microstructural feature is now understood as a manifestation of the Kirkendall effect [1].
The average compositions of the reaction products were calculated as Ag0.154Zn0.846 for the ε"AgZn3" phase, Ag0.394Zn0.606 for the γ-"Ag5Zn8" and Ag0.521Zn0.479 for the β-"AgZn" phase.
References [1] A.
Online since: May 2011
Authors: Gang Liu, Ming Liu, Shou Zhi Pu
Diarylethene 1a changed the color from colorless to Orange-red upon irradiation with 297 nm UV light, in which absorption maxima were observed at 479 nm in hexane and at 485 nm in PMMA amorphous film, respectively.
Scheme 1.
The colorless 1a has the absorption maxima at 281 nm (ε, 1.7×104 mol-1 L cm-1).
Figure 1.
References [1] G.H.
Scheme 1.
The colorless 1a has the absorption maxima at 281 nm (ε, 1.7×104 mol-1 L cm-1).
Figure 1.
References [1] G.H.
Online since: July 2014
Authors: Chang Wang
Research on GPS height partition fitting method
Chang Wang1, a
1 University of Science and Technology Liao Ning School of Civil Engineering, AnShan LiaoNing
awangchang324@163.com
Keywords: Partition Fitting;The Quadric Surface Fitting; Mobile Triangle Method
Abstract.
(2)Use mobile triangle method to establish GPS height fitting method in 1 area, 2area , 6area, 7area and 8 area, from table2, 3 and fig.4~7 can see GPS height fitting result, Table 2 The quadric surface fitting accuracy in four regions unit :mm name 3region 5region 9region 4region internal accord precision 11.7 8.4 8.8 17.3 external accord accuracy 8.6 9.3 11.0 29.8 Table 3 Mobile triangle method fitting accuracy unit :mm 1 region check point residual value δ=46.29 2 region check point residual value δ=1.96 6 region check point residual value δ=31.73 411 46.29 402 1.96 455 31.73 7 region check point residual value δ=17.9 8 region check point residual value δ=33.82 443 476 17 18.78 479 33.82 Fig.4 The residual value comparison of the public point in 3 region in no partition and partition situation Fig.5 The residual value comparison of the public points in 5 region in no partition and partition situation Fig.6 The residual value comparison
From fig.7,we can see that the residual value of three points(402, 443, 479) is less than that in no partition situation by mobile triangle method in 2 region, 7 region and 8 region.
Summary 1.If the effect of GPS height fitting is better in whole region, use partition fitting to establish fitting model in this region can effectively improves the fitting precision. 2.
Reference [1]Gongyusheng.
(2)Use mobile triangle method to establish GPS height fitting method in 1 area, 2area , 6area, 7area and 8 area, from table2, 3 and fig.4~7 can see GPS height fitting result, Table 2 The quadric surface fitting accuracy in four regions unit :mm name 3region 5region 9region 4region internal accord precision 11.7 8.4 8.8 17.3 external accord accuracy 8.6 9.3 11.0 29.8 Table 3 Mobile triangle method fitting accuracy unit :mm 1 region check point residual value δ=46.29 2 region check point residual value δ=1.96 6 region check point residual value δ=31.73 411 46.29 402 1.96 455 31.73 7 region check point residual value δ=17.9 8 region check point residual value δ=33.82 443 476 17 18.78 479 33.82 Fig.4 The residual value comparison of the public point in 3 region in no partition and partition situation Fig.5 The residual value comparison of the public points in 5 region in no partition and partition situation Fig.6 The residual value comparison
From fig.7,we can see that the residual value of three points(402, 443, 479) is less than that in no partition situation by mobile triangle method in 2 region, 7 region and 8 region.
Summary 1.If the effect of GPS height fitting is better in whole region, use partition fitting to establish fitting model in this region can effectively improves the fitting precision. 2.
Reference [1]Gongyusheng.
Online since: March 2023
Authors: Aleksey I. Shamshurin, Artem Kim, Anatoly A. Popovich, Alina K. Mazeeva, Kirill A. Starikov
The samples without visible defects showed a mean conventional tensile failure stress of 479 MPa and a residual deformation of about 0.04%, which confirms their brittleness when not heat-treated.
The latter can show magnetically induced strain (MIS) much higher than magnetostrictive alloys do due to martensitic transformation taking place in FSMA [1].
The parameters are presented in Table 1.
(1) Table 1 – SLM modes used for manufacturing Ni36Co37Al27 samples Mode P, [W] v, [mm/s] h, [mm] t, [mm] Energy density, [J/mm3] 1 225 500 0.06 0.05 150 2 200 550 0.08 0.05 91 3 200 480 0.12 0.05 69 4 300 500 0.06 0.05 200 5 200 550 0.06 0.05 121 6* 200 550 0.06 0.05 121 7* 225 500 0.06 0.05 150 8* 300 500 0.06 0.05 200 The modes marked with * means that every layer was preliminary scanned by 1000 W laser with the following parameters: P = 300 W, v = 2000 mm/s, h = 0.12 mm, t = 0.05 mm.
References [1] E.
The latter can show magnetically induced strain (MIS) much higher than magnetostrictive alloys do due to martensitic transformation taking place in FSMA [1].
The parameters are presented in Table 1.
(1) Table 1 – SLM modes used for manufacturing Ni36Co37Al27 samples Mode P, [W] v, [mm/s] h, [mm] t, [mm] Energy density, [J/mm3] 1 225 500 0.06 0.05 150 2 200 550 0.08 0.05 91 3 200 480 0.12 0.05 69 4 300 500 0.06 0.05 200 5 200 550 0.06 0.05 121 6* 200 550 0.06 0.05 121 7* 225 500 0.06 0.05 150 8* 300 500 0.06 0.05 200 The modes marked with * means that every layer was preliminary scanned by 1000 W laser with the following parameters: P = 300 W, v = 2000 mm/s, h = 0.12 mm, t = 0.05 mm.
References [1] E.
Online since: September 2011
Authors: Chun An You, Jian Xin Liu, Lin Lin Sun, Qiu Yuan Liu
A large scope plastic zone emerges in the northern slope of the pit between exploratory lines 479 and 491.
The designed scope of slope cutting is shown in Fig.1.
After a large deformation emerged, the northern slope of the pit between exploratory lines 479 and 491 reaches a new state of balance.
Analysis and calculation show that this is a limit equilibrium state, and the safety factor is close to 1.
Vol. 1 (2004), p.72
The designed scope of slope cutting is shown in Fig.1.
After a large deformation emerged, the northern slope of the pit between exploratory lines 479 and 491 reaches a new state of balance.
Analysis and calculation show that this is a limit equilibrium state, and the safety factor is close to 1.
Vol. 1 (2004), p.72
Online since: June 2012
Authors: Zheng Cheng Zhang, Hai Zhong Liu
Some aging properties and stochastic comparisons on the residual life are obtained.
1.
For more details about order statistics, see [1], and [2] etc.
And from Theorem 1.C.37 of [4], for all , and , hence from Theorem 1.C.17 of [4] again, the result holds.
References [1] H.A.
Wang, The NBUC and NWUC classes of life distributions, Journal of Applied Probability 31 (1991) 473-479
For more details about order statistics, see [1], and [2] etc.
And from Theorem 1.C.37 of [4], for all , and , hence from Theorem 1.C.17 of [4] again, the result holds.
References [1] H.A.
Wang, The NBUC and NWUC classes of life distributions, Journal of Applied Probability 31 (1991) 473-479
Online since: October 2011
Authors: Yue Feng Zhu, De Lin Chen
Low Analysis of Steady Flow Field in Mechanical Seal Based on ANSYS
Zhu Yuefeng 1,2,a Chen Delin 2,b
1 Hefei University of Technology,Hefei,China
2 Kaifeng University, Kaifeng, He Nan, China
akufao@sohu.com
Keywords: mechanical seal; flow field; cloud; ANSYS
Abstract.
Finite element model of the grid shown in Fig.1: Fig.1 Finite element model picture Loading and the Solving.
References [1] Jiang Xiaowen, Gu Boqin.
Journal of Xi'an Jiaotong University, 2004,38(5):474-479( In Chinese) [4] Zhong Ru-lin, Chen Ci-chang, Guan Jian-feng.
Sichuan University of Science andTechnology, 2004,38(5):474-479( In Chinese) [5] Parviz Merati, Nori Aki Okita, Robert L Phillips.
Finite element model of the grid shown in Fig.1: Fig.1 Finite element model picture Loading and the Solving.
References [1] Jiang Xiaowen, Gu Boqin.
Journal of Xi'an Jiaotong University, 2004,38(5):474-479( In Chinese) [4] Zhong Ru-lin, Chen Ci-chang, Guan Jian-feng.
Sichuan University of Science andTechnology, 2004,38(5):474-479( In Chinese) [5] Parviz Merati, Nori Aki Okita, Robert L Phillips.