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Online since: June 2010
Authors: Yong Xiang Zhao, Bing Yang
Threeteen test data were obtained from each sample.
Eight test data were obtained for each phase.
Table 3 Test micro-hardness values Structure Sampling size Test data Hi, i=1, 2, …, nh (KHN0.98) Average Value (HV10) Standard deviation (HV10) Cov 1 2 3 4 5 6 7 8 Ferrite 8 253.32 225.87 220.06 224.64 259.28 220.06 232.17 221.25 104.037 6.968 0.06697 Pearlite 8 277.83 292.17 334.84 266.41 285.04 312.82 267.36 343 133.334 13.282 0.09961 Macrostructure Check.
Reduction of area is up to 45 % which are much larger than those of conventional ferrous alloys.
Significant neck reduction was appeared before the specimen failure.
Online since: January 2013
Authors: Dong Pyo Hong, Namr Young Choi, Hyun Sik Kim, Il Taek Lee
The Weight Reduction Design of the Regenerator CA Nozzle in FCC Unit Using the FEA Iltaek Leea, Hyunsik Kimb, Namryoung Choic and Dongpyo Hongd Division of Mechanical system Engineering, College of Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea aLee8607@jbnu.ac.kr, bhyunsiclove@jbnu.ac.kr, cherocnr2002@jbnu.ac.kr, dhongdp@jbnu.ac.kr Keywords: ASME Code, CA nozzle thickness, FEA, Structure analysis.
In this paper, FEA (Finite element analysis) of the FCC unit was performed to evaluate its structural stability and weight reduction.
Particularly, the study focuses on the reduction of weight in the FCC unit by means of structural analysis.
Fig. 2 The result of FEA of the CA Nozzle According to the results of the analysis, the equivalent stress is 160.98MPa, the data is satisfied the ASME Code spec(168MPa).
Online since: September 2013
Authors: Yi Zhang, Yong Chen Song, Shu Yang Liu, Yang Chun Zhan, Duo Li, Cheng Hu, Wei Wei Jian
Accurate experimental data would ensure the authenticity of key simulation parameters and reliability of simulations, but the existed experimental data is scarce.
More experimental researches should be conducted to obtain a great quantity of accurate data which can make the simulation more close to the actual situation.
Energy Technology Analysis-Prospects for CO2 Capture and Storage (Paris, France, 2004). ] showed that the test data of K12-B pilot project was 0.03-0.05tCH4/tCO2.
According to Clemens’s data [10], the gas volume of increase production is calculated as 63.9~191.7×109Nm3, equivalently 85~255×106t standard coal added (taking 1Nm3 CH4 as 1.33kg standard coal).
The authenticity of key simulation parameters and reliability of simulations is dependent on accurate experimental data.
Online since: August 2004
Authors: Young Shin Kim, Yong Rae Roh
Validity of the FE model was verified through comparison of numerical analysis results with the model with experimental data.
Schematic of a convex ultrasonic array transducer. 0.0 2.0x10 6 4.0x10 6 6.0x10 6 8.0x106 1.0x107 -30 -24 -18 -12 -6 0 dB frequency(Hz) simulation data measurement data (a) (b) Fig. 2.
Comparison of FEA results with experimental data: (a) frequency spectrum, (b) radiation pattern.
The results in Fig. 4 was used as the reference data to evaluate the efficiency of structral schemes to reduce the cross talk level.
However, to be more specific with the data, cross talk was smallest when damping ratio of the wall was 1.0.
Online since: November 2012
Authors: Jae Ho Jung, Young Min Kim, Seung Joe Yoon
In addition, since the current cement manufacturing releases 800kg CO2/ton of cement, carbon dioxide reduction measures are urgently required.
Inorganic powder characteristics Segment Diameter (㎛) Chemical composition SiO2 CaO Al2O3 MgO SO3 Fe2O3 Na2O BFS 15.4 29.4 40.2 15.4 7.9 4.4 0.5 0.22 FA 31.2 52.2 8.76 21.7 2.0 0.8 8.9 1.42 RL 7.0 12.2 73.8 5.1 2.2 0.6 2.8 1.53 SL 15.2 1.16 95.0 0.33 1.78 0.69 0.45 0.09 NS 207.8 0.03 0.14 0.01 0.14 51.8 0.00 46.6 Experimental methods.In this study, we measured the compressive strength of specimens of 40mm × 40mm × 160mm after mixing mortar based on KS L 150 679 and conducted pH measurement based on KS F 2103 by collection specimens after measurement of the compressive strength by material age[3].For calculation of carbon dioxide emissions by the powder type, national LCI data of Korea Environmental Industry & Technology was utilized.
The pH reduction rate was significantly high when GTB was added.
Carbon dioxide reductions.A comparative analysis was conducted to examine the carbon dioxide emissions occurred in manufacturing 1 ton of non-cement type powder, and based on this, the amount of carbon dioxide reduction was deduced as follows.
However, it is necessary to add admixture to complement the problems of reduction in strength development due to reduction of hydration products caused by dissociation reaction, and the use of low W/B and admixture for high strength needs to be taken into account.
Online since: June 2014
Authors: Zaki Suud, Hiroshi Sekimoto, Indah Rosidah, Maryam Afifah, A. Ferhat
At the beginning we assume the power density level in each region and then we perform the burn-up calculation using the assumed data.
The burn-up calculation is performed using cell burn-up in SRAC code which then give eight energy group macroscopic cross section data to be used in two dimensional R-Z geometry multi groups diffusion calculation.
It is shown that reduction of the number of regions from 10 to 8 which directly reduces the discharge burn-up gives reduction of effective multiplication constant especially in the beginning of life.
This reduction of the number of regions with the same other parameters resulted in reduction of burn-up level from about 26,3%HM to 21.2% HM (or 263000 MWd/tohHM to 212000 MWd/ton HM).
The reduction of region from 8 to 6 with the same other parameters resulted in reduction of burn-up level from about 26,4%HM to 20.1% HM (or 264000 MWd/tohHM to 201000 MWd/ton HM).
Online since: February 2014
Authors: Zhan Bo Yu, Kai Jian Tan
Chemical transformation graphene oxide reduction method has been called “GO”.
The reduction of graphene can concluded through chemical conversion.
The reduction of graphene is shown in Figure 2.
Fig. 2 Preparation schematic of reduction of graphene Figure 2 is structure of reduction of graphene.
In order to study the conductivity and service life characteristics of the composite membrane, this paper gets the data sheet which is shown in Table 1 through experiments eventually.
Online since: October 2012
Authors: Marlena Rajczyk, Damian Jończyk
A preliminary numerical analysis showed a reduction of deflections of reinforced beams by about 11 to 14 % and a reduction of 19 to 25 % of normal stress.
Glulam beam strengthened with aramid cords Material data.
Aramid rope material constants adopted on the basis of data presented in [9].
The data adopted for the calculation are presented in Table 1.
Only in tension zone strengthening with two layers of cords cause reduction of 25 % of normal stress in comparison to a non-reinforced beam.
Online since: December 2011
Authors: Xiao Hui Chen, Ren Pu Li, Zhi Wang Zhang
Interval Granules in Incomplete Information Systems Xiaohui Chen1,a,Renpu Li1,b,Zhiwang Zhang1 1School of Information Science and Engineering , Ludong University, Yantai 264025, China acxh001213@163.com, blrp0109@163.com Keywords: Incomplete information system, Interval granule, Nested sequence, Precision Abstract:Rough set theory is an efficient mathematical theory for data reduction and knowledge discovery of various fields.
Introduction Rough set theory[1], developed by professor Pawlak in 1982, is a new mathematical theory to deal with imprecise, incomplete and inconsistent data.
More studies based on interval granule will be given for the attribute reduction and rule extraction.
Online since: August 2006
Authors: Koji Watari, Sachie Nagano
Therefore, we aim to estimate energy consumption and investigate the optimum conditions and processes for energy reduction.
The reduction of energy can be calculated on sintering process by decreasing particle size.
In the case of the particle size decreasing from 400 to 40 nm, the energy reduction is ca. 310 � � /kg and the reduction ratio of energy is around 30 %. 3.1.2 Modeling with Experimental Thermal Efficiency.
The energy consumption using 5 mass% PVA is thus ca. 26 kJ/kg. 3.4.2 Modeling with Practical Data.
Decreasing particle size from 400 to 40 nm enables the 40% energy reduction in this assessment. 5.
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