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Online since: November 2010
Authors: Kazuya Mori, Masatoshi Kuroda, Teruaki Yamada
These material constants are measured
by the experimental data fitting.
However, most of the numerical simulations for shot peening were performed by using literature data.
S [MPa] Elongation [%] Reduction of Area [%] Brinell Hardness [HBW] SUS316 344 573 63 73 156 Table 1 Chemical compositions [wt%] Table 2 Mechanical properties Finite Element Modeling and Results The axisymmetric FE model was developed using the commercial FE code ABAQUS/explicit [8] and used to investigate a single shot impacting on a target.
Cook, A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures, Proceedings of the Seventh International Symposium on Ballistics, The Huge, The Netherlands, 1973, pp. 541-547
However, most of the numerical simulations for shot peening were performed by using literature data.
S [MPa] Elongation [%] Reduction of Area [%] Brinell Hardness [HBW] SUS316 344 573 63 73 156 Table 1 Chemical compositions [wt%] Table 2 Mechanical properties Finite Element Modeling and Results The axisymmetric FE model was developed using the commercial FE code ABAQUS/explicit [8] and used to investigate a single shot impacting on a target.
Cook, A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures, Proceedings of the Seventh International Symposium on Ballistics, The Huge, The Netherlands, 1973, pp. 541-547
Online since: September 2013
Authors: Cheng Ming Chen, Hui Wang, Yong Tang, Xun Zhang
Results
Critical Fusion Frequency (CFF)
CFF was a significant index that evaluated visual fatigue and CFF reduction showed that visual fatigue level increased [2].
The experiment data showed that CFF of each subject was reduced after watching a video clip.
CFF data of all subjects before the experiment, after watching OLED and LCD tablet-PCs were shown in Fig. 1 Fig.1 CFF of 12 subjects Eye Blink Frequency (BF) In previous works, numbers of blink were used to evaluate visual fatigue and an increase of BF reflects higher visual fatigue [2,4].
The objective data were consistent with subjective questionnaire survey.
The experiment data showed that CFF of each subject was reduced after watching a video clip.
CFF data of all subjects before the experiment, after watching OLED and LCD tablet-PCs were shown in Fig. 1 Fig.1 CFF of 12 subjects Eye Blink Frequency (BF) In previous works, numbers of blink were used to evaluate visual fatigue and an increase of BF reflects higher visual fatigue [2,4].
The objective data were consistent with subjective questionnaire survey.
Online since: May 2005
Authors: Michael G. Spencer, A. Matulionis, O. Kiprijanovič, L. Ardaravičius, Ho Young Cha, Y.C. Choi, Lester F. Eastman
The reduction in
the Schottky barrier height is given by [4]
s
bieffbi
Eq
EVV
πε
α
4
. −−=
The solid lines in Fig. 2 (b) are the measured data of a fabricated device.
Fig. 3 shows the comparison of the gate bias dependent cut-off frequency between simulation results and measured data at Vds = 20 V.
The simulation results have the same trend as the measured data though a trivial difference is observed between the values.
The solid lines in Fig. 2 (b) are the measured data of a fabricated device.
Fig. 3 shows the comparison of the gate bias dependent cut-off frequency between simulation results and measured data at Vds = 20 V.
The simulation results have the same trend as the measured data though a trivial difference is observed between the values.
Online since: April 2009
Authors: Geun An Lee, Nak Kyu Lee, Hye Jin Lee, A. Ruem Han, Jung Han Song
And we analyzed micro
strain data of 99.9% nickel thin foil material.
The error in test data can be possible to occur because of irregular distribution characteristic of two points.
tan , tan y y x x θ θ = = l l l l (1) (a) (b) (c) Fig.1 Schematic description of strain measurement analysis: (a) point P1 and P2 of test film using gauge maker; (b) center of point using quadrangle; (c) tangent rule for the parallelism Fig.2 Applied two principles in software shape for reduce to test data error Fig.3 System of Micro strain measurement (a) (b) Fig.4 Deformation of micro thin film specimens with the thickness of 500㎛ at RT : (a) before experiment ; (b) after experiment 0 20 40 60 80 0 100 200 300 400 500 stress(MPa) strain(%) L2W1_ASM L2W1_VSM L2W2_ASM L2W2_VSM 0 20 40 60 80 100 120 0 20 40 60 80 100 120 140 160 180 200 220 240 stress(MPa) strain(%) L2W1_ASM
And CCD camera of the area range 30*29(mm w/o optics), pixel size is 7.4µm × 7.4µm specific and harmony geared step motor of reduction ratio 1:100 was used for precision measurement.
The error in test data can be possible to occur because of irregular distribution characteristic of two points.
tan , tan y y x x θ θ = = l l l l (1) (a) (b) (c) Fig.1 Schematic description of strain measurement analysis: (a) point P1 and P2 of test film using gauge maker; (b) center of point using quadrangle; (c) tangent rule for the parallelism Fig.2 Applied two principles in software shape for reduce to test data error Fig.3 System of Micro strain measurement (a) (b) Fig.4 Deformation of micro thin film specimens with the thickness of 500㎛ at RT : (a) before experiment ; (b) after experiment 0 20 40 60 80 0 100 200 300 400 500 stress(MPa) strain(%) L2W1_ASM L2W1_VSM L2W2_ASM L2W2_VSM 0 20 40 60 80 100 120 0 20 40 60 80 100 120 140 160 180 200 220 240 stress(MPa) strain(%) L2W1_ASM
And CCD camera of the area range 30*29(mm w/o optics), pixel size is 7.4µm × 7.4µm specific and harmony geared step motor of reduction ratio 1:100 was used for precision measurement.
Online since: June 2012
Authors: Jun Ding, Hong Quan Sun
Based on the formula of calculating elastic modulus in "Design Specification of Concrete Structures" [6], we obtain the conclusion that the reduction of the compressive strength will directly lead to reduce the elastic modulus.
Using the data in Table 2, the elastic modulus of LW-B and LW-S are less than that of LW-M.
As the load continues to grow, we can observe that the data of loads showing on the dial indicator at the bearing point are the same on the whole and the deformation almost stops.
The first, the number of the test beam is less and the test data are certain discrete.
Using the data in Table 2, the elastic modulus of LW-B and LW-S are less than that of LW-M.
As the load continues to grow, we can observe that the data of loads showing on the dial indicator at the bearing point are the same on the whole and the deformation almost stops.
The first, the number of the test beam is less and the test data are certain discrete.
Online since: August 2004
Authors: Kang Ho Ahn, Gon Ho Kim, Jang Sik Han
The
particle concentration and the current are monitored and recorded by a personal computer for further
data analysis.
The plasma diagnostic system consists of Langmuir probe, OP Amp, function generator, 2 channel oscilloscope, and the data acquisition and storage system.
Fig. 5 shows the raw data of the particle concentration measured with CPC and the current as a function of time when 50nm Al2O3 particles are introduced into the plasma chamber.
This may be caused by NaCl particle size reduction effect when the NaCl particle is exposed in the plasma region.
The plasma diagnostic system consists of Langmuir probe, OP Amp, function generator, 2 channel oscilloscope, and the data acquisition and storage system.
Fig. 5 shows the raw data of the particle concentration measured with CPC and the current as a function of time when 50nm Al2O3 particles are introduced into the plasma chamber.
This may be caused by NaCl particle size reduction effect when the NaCl particle is exposed in the plasma region.
Online since: June 2012
Authors: Pei Lin Zhang, Yan Long Chen
Different singular values represents different elements in raw data, so the fault information can be extracted by selecting singular values and the recersible process of SVD decomposition by using the selected singular values can perform the noise reduction.
Then matrix A can be projected into a new matrix expressed by the n eigenvalues, obtaining a new data matrix A∗.
(4) Calculate the difference between the data x(t) and m(t), d(t)=x(t)−m(t).Ideally, d(t) is an IMF.
Then matrix A can be projected into a new matrix expressed by the n eigenvalues, obtaining a new data matrix A∗.
(4) Calculate the difference between the data x(t) and m(t), d(t)=x(t)−m(t).Ideally, d(t) is an IMF.
Online since: May 2012
Authors: Ying Zhang, Li Bin Fu
The raw materials used in this test were: Beijing Xingang 42.5 ordinary portland cement, the gravel with particle size of 5~10mm, Zhuozhou river pebbles with particle size of 5~10mm as the coarse aggregate, Langfang river sand as the fine aggregate, naphthalene series superplasticizer as the high efficiency water reducing agent whose water reduction rate is 20%.
The data gotten from the test are shown in Table 2.
Due to the characteristics that being sensitivity on its structure defect strength of the ecological pervious concrete, the strength data presented an obvious dispersion, so more data should be obtained through further tests to get the accurate relationship among the strength.
The data gotten from the test are shown in Table 2.
Due to the characteristics that being sensitivity on its structure defect strength of the ecological pervious concrete, the strength data presented an obvious dispersion, so more data should be obtained through further tests to get the accurate relationship among the strength.
Online since: June 2014
Authors: Dan Li, Bin Wang, Jiang Yue Tan
Analytical methods for water qualities
The COD was determined by the potassium dichromate method, BOD5 by the dilution method, pH by the glass electrode method, MLSS by the standard method ,p-nitroaniline by uv spectrophotometry, nitrobenzene by reduction-azo photometric method.
treatment effect ultrasonic power removal rate of p-nitroaniline removal rate of nitrobenzene removal rate of COD /W / % / % / % 0 59.6 54.2 69.4 6 84.7 81.5 80.3 8 90.2 86.3 84.5 10 97.8 94.3 90.6 12 96.6 93.4 88.2 14 93.5 91.3 82.0 The test data
frequency removal rate of p-nitroaniline removal rate of nitrobenzene removal rate of COD /Hz / % / % / % 0 59.6 54.2 69.4 15 91.7 87.5 83.9 20 93.2 90.6 86.5 25 97.8 94.3 90.6 30 97.2 94.0 90.2 35 96.3 93.4 89.2 It can be seen from the test data
irradiation time removal rate of p-nitroaniline removal rate of nitrobenzene removal rate of COD /min / % / % / % 0 59.6 54.2 69.4 5 80.7 77.3 79.2 10 88.0 85.1 84.1 15 97.8 94.3 90.6 20 96.7 93.5 87.5 25 94.1 92.0 81.4 It can be seen from the test data
treatment effect ultrasonic power removal rate of p-nitroaniline removal rate of nitrobenzene removal rate of COD /W / % / % / % 0 59.6 54.2 69.4 6 84.7 81.5 80.3 8 90.2 86.3 84.5 10 97.8 94.3 90.6 12 96.6 93.4 88.2 14 93.5 91.3 82.0 The test data
frequency removal rate of p-nitroaniline removal rate of nitrobenzene removal rate of COD /Hz / % / % / % 0 59.6 54.2 69.4 15 91.7 87.5 83.9 20 93.2 90.6 86.5 25 97.8 94.3 90.6 30 97.2 94.0 90.2 35 96.3 93.4 89.2 It can be seen from the test data
irradiation time removal rate of p-nitroaniline removal rate of nitrobenzene removal rate of COD /min / % / % / % 0 59.6 54.2 69.4 5 80.7 77.3 79.2 10 88.0 85.1 84.1 15 97.8 94.3 90.6 20 96.7 93.5 87.5 25 94.1 92.0 81.4 It can be seen from the test data
Online since: December 2003
Authors: Kyung Sik Oh, J.W. Choi, E.K. Kwak, T.G. Kwon, Young Keun Jeong, Hong In Shin, Hyung M. Cho, H.M. Ryoo
The in vivo test was carried out by implanting Ag-HAps in artificial bone defects
at the periapical area of both mandibular 1
st molar of rats and no remarkable cytotoxicity was found unlike
what was observed in the in vitro data.
These findings were similar to our previous data obtained from disc-shaped Ag-doped HAps with various Ag contents.
Radiographically the implanted Ag-doped HAps within periapical defects of mandibular 1st molar area of both sides induced gradual reduction of defect size with time, regardless of Ag contents.
Our data suggest that HAps doped with Ag up to 4.3% can be an effective bone filler with antimicrobial properties for infection-associated bony defects.
These findings were similar to our previous data obtained from disc-shaped Ag-doped HAps with various Ag contents.
Radiographically the implanted Ag-doped HAps within periapical defects of mandibular 1st molar area of both sides induced gradual reduction of defect size with time, regardless of Ag contents.
Our data suggest that HAps doped with Ag up to 4.3% can be an effective bone filler with antimicrobial properties for infection-associated bony defects.