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Online since: April 2009
Authors: Mok Soon Kim, Tadasu Abumiya, Shuji Hanada, Naoya Masahashi, Taek Kyun Jung
Different areal reductions of 98.5%, 95.7%, 85.9%, 70.2% and 43.7% were obtained in 3 mmφ rods through this procedure.
Using these rods with 50 mm in length, Young's modulus was measured as a function of reduction by the free resonance vibration method.
For XRD analysis of data obtained from a wide area, 7 disks with 0.7 mm in thickness were electro-discharge machined from a 3 mmφ rod and pasted on a glass plate in a close packed arrangement after mechanical and mirror-like polishing.
Fig. 1 shows Young's modulus of swaged 3 mmφ rods as a function of areal reduction, where data from cold rolled plates [5] and groove-rolled rods [6] are included for comparison.
In contrast to cold rolled plates and groove-rolled rods, Young's modulus of swaged rods is not changed against reduction of area.
Online since: July 2014
Authors: Si Yi Jiang
The datum plane adopt Yellow Sea elevation height datum.
Layout net,Electing points,Buried stone Calculating Gaussian side inversely Coordinate calculate azimuth inversely Ranging length on the ellipsoid Develop measurement program Field GPS data acquisition Horizontal distance of ranging side GPS data processing in the industry Side length on the projection plane Calculating construction control net result on construction projection plane Conducting bridge axis lofting by Construction control net result Fig.1 GPS measurement and data processing flow chart Math model of side length conversion.The length that the gauss plane reduction to the ranging side length of reference ellipsoid [3],such as equation 1
The ranging side length that reference ellipsoid reduction to the measured horizontal distance,such as equation 2
GPS data processing and precision statistics.Baseline solution.After completion of field data acquisition, conducting data processing by the baseline solution and net adjustment software that was given by Southern Company.
References [1] Dajie Liu, Yimin Shi, JingJun Guo.Global Positioning System (GPS) and data processing[M].Tongji University Press,1996(In Chinese)
Online since: July 2014
Authors: Jian Zhong Chen, Pei Qing Liu
These factors will amplify the test data error.
Rudder control system and aerodynamics measurement system Test Data and Analyzing For test data analysis purposes, it is need to analyze the characteristics of the grid fin flow around.
The CN data follows trends exhibited at subsonic and higher supersonic Mach numbers.
A concave exists in the CN data through the transonic and lower supersonic Mach number range.
The main advantage of this platform is that it can reduce test data errors caused by model zoom out.
Online since: January 2014
Authors: Chun Wen Huang, Gang Ji, Q. Zhou
The conclusion drawn in the paper will provide some guidance for acoustic reduction by shaft isolation design.
Relation between the power injected from the shaft through the junctions and that radiated from the hull help to understand the mechanism of power transmission and transform and provide some guidance for acoustic reduction.
However, the simple reduction of vibration cannot always reduce the radiated acoustic power [5].
Fig. 1 The cylindrical model used for analysis Table 1 Data of the cylindrical model Parameter Value Length of the pressure hull 45 m Radius of the pressure hull 3.5 m Thickness of the pressure hull 0.028 m Stiffener dimension 0.224 m×0.014 m Stiffener spacing 0.5 m Bearing mass 200 Kg Shaft cross-sect radius Annular section, R1 0.160 m, R2 0.06m Shaft length 8.3 m For analysis, the cylinder is divided into two parts.
Means such as isolation at the back bearing junction of foundation and the hull will be useful for the acoustic radiation reduction.
Online since: December 2013
Authors: Tamihiro Gotoh, Kosuke Yazawa, Kento Imai
The reduction of defects is essential for SnS with improved electronic transport properties.
The electrical activation energies Ea on going up and down in temperature were estimated to be 0.33 and 0.29 eV from the data.
Solid lines are the Arrhenius plot to the data.
The present data seem to be consistent with band model of CSP samples [7].
Heat-induced crystallization and structural change cause reduction of defect density.
Online since: July 2011
Authors: Hua Zhang, Ying Xia Qi, Sheng Xi Zhao
From table 1, it is known that the density of 1.09 of the only large cage occupied hydrates is nearest to the measured data.
From Table 1, it is known that the potential energy reduction due to the occupation of the large cage is larger than that due to the occupation of the small cage.
The potential and enthalpy energy reduction due to the occupation of a single cage can be calculated by the Eq. 1:
Only large cages occupied 1.09 (0.027※) -2.5430 -2.1668 -0.03835 (-0.03117)* Only small cages occupied 0.90 (0.217※) -2.3804 -2.0380 -0.03375 (-0.02910)* ※: the error of the calculated density to measured data; *: the reduction of enthalpy From Table 2, it is known that the equilibrium pressure of the only large cage occupied hydrates is much lower than that of the only small cage occupied or all cage occupied hydrates.
Data 1991; 36: 68-71 [2] Lee H, Seo Y, Seo Y-T, Moudrakovski IL, Ripmeester JA: Angew.
Online since: November 2013
Authors: Jan Zeman, Pavel Tesárek, Václav Nežerka
By fitting the results of our calculations to the experimentally measured data, it turned out that the critical ratio, , has to be reduced by a coefficient .
The reduction of the matrix stiffness is accomplished by an additional compliance tensor, represented by its volumetric and deviatoric parts, and , given by [12]: (2) corresponding to the scheme of dilute distribution.
The correction coefficient , equal to 0.7, had to be employed for the reduction of in order to reach an agreement with the measured data.
The correction by a single coefficient ensures an excellent agreement of the predicted stiffness with the experimentally measured data.
Based on our experience, the stiffness reduction is coupled with the reduction of mortar strength.
Online since: October 2011
Authors: Li Wei Hu, Yu Long Pei
Method In this paper, the data are obtained through driving simulation and practical experiments.
Data collection projects: Driver’s physiological data; Temperature, Humidity, Thickness of ice and snow; Compaction degree; Braking distance and Braking time etc.
Driver’s (driver A and driver B) physiology data are obtained under the simulation ice-snow pavement conditions, then the time domain and frequency domain analysis as Fig.11- Fig.14 shown.
Through the comparison analysis of data and maps can be drawn that the changes range of driver A’s main physiology indexes is more obvious (more sensitive) than driver B’s.
Then driver’s physiology data are obtained under the simulation ice-snow steep slope road, then the time domain and frequency domain analysis as Fig.15 and Fig.16 shown.
Online since: September 2013
Authors: K. Senthil Kumar, R. Thundil Karuppa Raj
A piezoelectric combustion pressure sensor (Kistler, 6125) and a data acquisition board are installed to measure the in-cylinder pressure.
A Kistler crank angle encoder (0.25oCA resolution) is fixed on the crankshaft which is used to clock pressure data acquisition.
The pressure data saved was fed to the Engine Combustion Pressure (ECP) analysis software to determine the Heat release rate, Temperature, etc.
During experiments, in-cylinder pressure data was acquired for 150 consecutive cycles.
The calculation of heat release energy from engine cylinder pressure data.
Online since: August 2012
Authors: Xian Song Xie
If there is no statistic data available, s data referenc as shown in Table 1[7].
Table 3 W0 data reference Maximum gravel size(mm) 16 20 25 31.5 W0(kg/m3) 235 215 210 205 Table 4 △h data reference Slump(mm) 150~180 200~220 $220 △h 0.04 0.06 0.08 The ratio of new type of high efficient water-reducing(CSP) agent to binding material should be 1%(Measured by solid). 3.7 Trial mixing for a proposal of reference mix proportion Trial mixing is carried out at a calculated mix proportion as above, by use of materials and mixing method for an involved construction project, so as to verify the mixture performance.
One of the figures is reference mix proportion, and the other two are an addition or a reduction of cement quantity by 20kg respectively, with a simultaneous reduction or addition of mineral admixture by 20kg.
One of the figures is reference mix proportion, while two of the figures are an addition or a reduction of cement quantity by 20kg respectively, with a simultaneous reduction or addition of GGBS by 20kg.
The last two figures are a reduction or an addition of GGBS by 20kg respectively, with a simultaneous addition or reduction of fly ash in equivalent quantity.
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