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Online since: August 2013
Authors: Hao Feng Huang, Nan Feng Xiao, Shi Zhao Li
Get HOG information of related key and get dimensionality reduction HOG information value form feature vector files 2.
Output: key’s is data pair number, value is the related type of integral. 1.
This paper used ORL data base which include 40 human faces and 10 pictures per one.
Such coordination is becoming small when data scale growing.
A tutorial on support vector machines for pattern recognition.Data Mining and Knowledge Discovery, 1998( 2):121 – 167
Online since: July 2011
Authors: Yan Zhang, Xiao Ling Chen, Zheng Ping Fang
The cone data reported here were the averages of three replicated experiments.
TG and DTG curves are presented in Fig.1 (a) and (b), respectively, and some detailed data are shown in Table 2.
Table 2 Detailed data obtained from TGA and DTG of ABS and flame retarded ABS in N2 Sample Tonset [℃] Tmax [℃] stage 1 stage2 stage 3 Residue [wt%] ABS-1 388 - 424 - 1 ABS-2 353 - 432 585 15 ABS-3 309 - 432 - 20 ABS-4 301 305 434 - 16 ABS-5 282 306 431 - 16 ABS-6 275 310 429 - 9 Flammability properties The limiting oxygen index (LOI) values of all the specimens for ABS and its composites are shown in Table 3.
Fig. 2 Heat release rate curves of flame retarded ABS formulations as a function of time The PHRR of ABS-2 with APP as flame retardant is 300 kW/m2, while ABS-3 with 6% addition of poly(DPA-PDCP) show a lower burning rate with the peak reduced to 265 kW/m2, only 88% of that of ABS-2 and 40% of that of pure ABS; the detailed data are shown in Table 4.
The reduction of PHRR and THR becomes small with the addition of poly(DPA-PDCP).
Online since: April 2015
Authors: Xian Ping Zhang, Hong Song Zhang, Xiao Ge Chen, Yuan Wei
The specific heat capacity () was determined as a function of temperature from the chemical compositions of (Sm1-xNdx)2Ce2O7 ceramics and the heat capacity data of constituent oxides (Sm2O3, Nd2O3 and CeO2) obtained from the literature [13] in conjunction with the Neumann-Kopp rule [14].
Data for the precise calculation of thermal expansion coefficient were measured in the temperature of ambient and 1000°C at a heating rate of 5°C /min in a argon atmosphere, and they were corrected using the known thermal expansion of a certified standard alumina.
Table 1 Atomic percentages of bulk samples of (Sm1-xNdx)2CexO7 solid solutions Ceramic bulk materials Element mole ratio Sm Nd Ce O Sm2Ce2O7 (Sm0.9Nd0.1)2Ce2O7 (Sm0.7Nd0.2)2Ce2O7 17.8 15.9 14.4 0 1.2 2.1 17.6 17.7 17.5 64.6 65.2 66.0 Thermal expansion coefficient of (Sm1-xNdx)2Ce2O7 ceramics as a function of the temperature is shown in Fig.3(a) together with the data of YSZ.
These data were corrected for porosity according to the Eq.(2).
For (Sm1-xNdx)2Ce2O7 ceramics, the regularity of the crystal structure is altered and the phonons are mostly scattered, resulting in a reduction of thermal conductivity due to the reduction of free length of phonons.
Online since: January 2004
Authors: P.A. Sterne, Amy L.R. Bug, Melaku Muluneh, Jillian Waldman
For realistic systems such as argon, we use a Hartree potential V+ calculated from overlapping atomic charges obtained from local Density Functional Theory (LDA-DFT), and a potential V− fit to scattering data[6], in a superposed atom approximation.
Ironically, the prevalent spherical "particle-in-a-spherical-box" (PIB) model[4], widely used to interpret data on micropores in molecular solids, would result in an increase in κ due to spherical confinement[10, 11].
This lifetime is in reasonable agreement with same-volume cube data at this temperature[5].
Yet, for example, the confinement of a spherical bubble of radius Rc = 8 au (typical in a molecular liquid) increases κ by 10%, a meaningful contribution given that the net experimental change (a reduction) tends to be 20% or less in many liquids and solids of interest [9, 12].
Preliminary data suggests that Ps is not localized in our model defect, although it is metastable there.
Online since: June 2007
Authors: H.D. Mepba, T. Ademiluyi
The importance of rheology in food processing and the dangers of, or incorrect rheological data on the nutritional and microbiological quality of foods are well known.
There is a growing commercial interest in processing Nigerian foods and rheological data are required for process design, especially for utilization of pumps and heat exchangers.
The present investigation was to obtain rheological data for coconut based yoghurts over a range of potential processing and handling temperatures.
The power-law equation (Lewis, [6]) has been widely used in analyzing viscosity and shear rate data.
After a sharp reduction, the apparent viscosity became steady at higher shear rate.
Online since: September 2013
Authors: Xue Qi Cen, Xiao Dong Wu, Gang Lei, Shu Qin Ma
Case study.Technical parameters and actual production data of XXX wells are as follows: Table 1 Technical parameters and actual production data of XXX wells Depth of the well, m 3813 Tubing outside diameter, mm 73 Reservoir static pressure,MPa 27.9 Tubing inside diameter,mm 62 Dynamic liquid level,m 1890 Water-cut,% 86.1 Static liquid level,m 1040 Density of reservoir oil, 851.5 Oil pressure,MPa 0.43 Density of natural gas, 1.022 Casing pressure,MPa 0.22 Density of formation water, 1055 GOR 147 Depth of pump,m 2473 Casing inside diameter,mm 144 Diameter of pump,mm 44 Theoretical flowing capacity, 32.6 Pumping effciency,% 79.75 Production, 26 Type of pumping unit CYJQ14-5-73HY(II) Length of stroke,m 4.96 Pumping speed, 3.23 Table 2 The contrast of contrivable results of the model and actual production data Data of rod string Maximum load .KN Minimum load .KN Rod gravity load.KN Rod type*Rod diameter(mm)*Rod length(m) Steel rod string design H-class weighted steel lever Φ28×220 +H-class
Because this unit doesn’t have reduction gearbox, crank connecting rod, balance weight, walking beam and horse head, its mechanical efficiency is up to in excess of 90 percent.
It doesn’t have reduction gearbox and complicated four-bar linkage compared to conventional pumping unit.
Online since: September 2013
Authors: C.O. Folayan, D.S. Yawas, S.Y. Aku, M.O. Afolayan
Robopike was used for studying drag reduction in fish-like locomotion.
The central controller of the robotic fish is based on a 400Mhz Gumstix Linux computer and is responsible for sampling data from sensors, processing the data and making decisions.
For swimming to take place, the microcontroller sends angle data to each servo motor.
The data is coded as pulse-width-modulated protocol.
The swimming operation lasted approximately 30min before a noticeable reduction in peak speed of 0.985m/s.
Online since: June 2014
Authors: Ji Luan Pan, Ke Jian Li, Zhi Peng Cai, Bo Qi Zhang
All data from the creep rupture test were analyzed with Larson-Miller (LM) parameter model for evaluating the creep rupture property of simulated joint more directly [12].
It was found that all the fractures appear in transition layers from a preliminary observation, so it is reasonable to compare the data of a similar 2.25Cr-1Mo steel from literature [13] with ours.
Besides the above, the data in Fig. 5 also shows that the alloy content gradients are getting lower layer by layer.
Because of that, the alloy content gradient in fusion zone can be considered as one of the important influencing factors of the creep rupture property reduction.
NRIM Creep Data Sheet No. 2B.
Online since: October 2014
Authors: Kamaruzaman Sopian, Shahrir Abdullah, Rozli Zulkifli, Ali Ahmed Gitan
However, adding more latent heat to the fuel may assist to improve the ignition of fuel thereby that leads to reduction in pollutant emission and fuel consumption.
Thermal data were collected by Graphtec GL820 multichannel data logger.
Results and Discussion The pulsating twin jet impingement heating system was tested and the results extracted from the experimental data are presented in this section.
The Nusselt number tendency is the reduction from maximum value of around 7.2 at 20 Hz to minimum rate of around 4.7 at 50 Hz.
The thermography capturing process was carried out on the back surface of copper foil flat target while the heat flux-temperature data were collected at the midpoint between the twin jets on the impinged surface of the target.
Online since: July 2014
Authors: P. Muthusamy, P. Senthil Kumar
The performance of the heat exchanger using air as the working fluid is then conducted and taken in to account with the data available, computer simulation is carried out with existing design to improve the geometry of the heat exchanger.
Experimental data shows maximum pressure reaches at around 12-17 kW of engine load.
Figure 5 MHE Vs CFD Analyse -variation of heat transfer rate with respect to mass flow rate From the Figure 5 come to know that experimental data are matching with CFD analysis by little margin variation.
The particular data of this project is about 20- 30 bar under normal work condition, which indicates the effect matrix heat exchanger imposes on the engine is minute.
Bergeles, Numerical evaluation of alternate tube configurations for particle deposition rate reduction in heat exchanger tube bundles, International Journal of Heat and Fluid Flow 22 (2001) 525–536
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