Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: July 2013
Authors: Hai Feng Zhang, Rui Weng, Xiao Shu Zhang, Yin Chun Liang, Xiao Wei Liu
In order to get more reduction of viscous drag, edge effect's influence is researched in this paper.
Fig. 3 Turbulent kinetic energy in central-axis cross-section structure of the rotor The stimulation data are processed using the methods of numerical analysis.
At steady state, fillet structure has a lower average drive current, a 19.6% reduction relative to the sharp edge structure.
The 0.5 mm curvature sample has already reached 19.6% reduction of drive current.
Drag reduction of Newtonian fluid in a circular pipe with highly water-repellent wall.
Online since: January 2014
Authors: Bo Lin
The current mainstream digital information integration methods can be generally divided into three types: (1) materialization method, also called as data warehouse method, is used for storing the integrated data sourcing from all data sources; (2) virtual method, also called as middleware method, applies a structure completely different from data warehouse; (3) materialization+ virtual method, also called as mixed method, makes compromise optimization on materialization method and virtual method, and then buffers important, less-changed, or commonly-used information locally with information buffer pool technology, but still acquires other information directly from information sources.
Conclusion First, compared with the traditional way of acquiring natural disaster monitoring and forecast information, the comprehensive information platform for the prevention of natural disasters based on ocean ships has attained a qualitative leap in the improvement of disaster prevention and reduction aid decision making.
Certainly, it is expected that the newest-generation ocean ship disaster prevention and reduction aid decision information system can be sooner born.
Meteorology and Disaster Reduction Research 3(8):211-214 [4] Fuxiang Xu (1998) Marine Disaster Characteristics and Disaster Reduction Strategies.
Online since: December 2018
Authors: Miloš Janeček, Josef Stráský, Petr Harcuba, Kristýna Halmešová, Dalibor Preisler
The inverse pole figures were extracted from measured EBSD maps by expanding the discrete data into a series of generalized spherical harmonic functions.
Fig. 1: EBSD orientation map of cold-swaged rod with 65% of area reduction.
The texture index (intensity of the strongest orientation that signifies, how this orientation is stronger than a random orientation) reaches values of approx. 4 at 40% of area reduction, nearly 9 at 65% of area reduction and over 13.5 in case of 80% of area reduction.
a) b) c) Fig. 2: Inverse pole figures of samples with a) 40%, b) 65% and c) 80% of area reduction.
After 80% of area reduction, there is almost only this 110 orientation as shown in Fig. 2.c).
Online since: January 2013
Authors: Jian Yin, Wei Min Song, Qing Huang
For the design of high performance concrete, admixtures are necessary to improve properties of concrete[4,5], hydration heat is one vital data which should be taken into consideration.
The reduction percentages of the hydration in the cementitious material caused by using UFA were summarized in Table 3.
Fig.2 Heat evolution rate of cementitious Fig.3 Heat evolution of cementitious materials with or materials with or without UFA without UFA Table 3 Reduction percentages of hydration heat of cementitious materials with various content of UFA Reduction percentage Time /h % initial setting final setting 10 20 30 40 50 60 72 G1 0 0 0 0 0 0 0 0 0 G5 37.5 37.2 24.7 16.8 14.6 14.6 14.1 13.1 12.1 G6 49.4 49.4 36.7 26.5 22.8 23.3 23.4 22.3 20.9 G7 62.1 63.2 50.3 36 31.5 31.5 31.2 29.8 28.2 Fig.4 Heat evolution rate of cementitious materials Fig.5 Heat evolution of cementitious materials with or without TJ-Ⅲ modified with or without TJ-Ⅲ modified Table 4 Reduction percentage of hydration heat with TJ-Ⅲ modified Reduction Percentage /% Time /h 5 10 20 30 40 50 60 72 G2 0 0 0 0 0 0 0 0 G3 68.3 74.1 31.2 11.5 5.7 3.6 2.3 2.17 Evaluation of the effect of superplasticizer.
In terms of the results presented in Table 4, the reduction percentage of the hydration heat was 74.1% after 10h setting time, but was only 2.17% after 3 days, which indicates that the effect of TJ-Ⅲ on reducing the hydration heat was primarily on the early stage of hydration.
As shown in Table 5, compared to the control group G1, the reduction percentage after 10h setting time was 31.4% for G3, and was 17.3% for G4.
Online since: August 2013
Authors: Xiong Fei, Yao Jin
It also reduces inventory costs by allowing lower WIP (Work-In-Process) quantity at any given time with the streamlined process.Generally a popular and simple way of cycle time reduction is to reduce WIP.
Coefficient of Variation (CoV) In most situations where data is presented, the reported indicators represent an average of the data points.
However, averages give no information about the distribution of the data.
CoV is a good measure of variation: (3) CoV can be used for any data set, as long as there are enough data points, typically more than 30 to have statistical validity.
With easy access to arrival and departure rate data, the factories now have one more data tool, besides CT, to pinpoint flow issues through the process.
Online since: July 2012
Authors: Siti Aslina Hussain, Jaafar Abdullah, Engku Mohd Fahmi Engku Chik, Noraishah Othman, Shahidan Radiman, Mohd Amirul Syafiq Mohd Yunos
The citrate-reduction-based method provides gold nanoparticles with higher concentration and narrow size distribution.
Radiotracers have distinct advantages for providing reliable data which, at present, cannot be obtained by any other technique.
Reduction of gold nanoparticles in particular by using tri-sodium citrate which is employed as a reducing agent for chemical reduction because citrate reduction is the most widely used method and also acts as a stabilizer for the gold nanoparticle colloid to preventing their rapid aggregation [6].
Sol-Gel Method Neutron Irradiation 197Au 197Au 198Au 197Au Nanoparticles 197Au-SiO2 Nanoparticles Radioisotope Prepared by citrate reduction 198Au-SiO2 Nanoparticles Fig. 1.
Conclusions This study showed that the ~30 nm uniform diameter gold nanoparticles colloids have been produced by using citrate-reduction method.
Online since: August 2012
Authors: Dao Jing Wang, Xing Hua Liu, Fu Shui Liu
The cylinder pressure data were measured by a Kistler 6117BFD17 pressure sensor with a measurement band of 0~200 bar and the measurement accuracy 0.6% FS.
The crank angle data were measured by a Kistler 2613B optical encoder with the resolution 0.1 °CA and the measurement deviation less than 0.01 °CA.
In this paper, the EGR ratio was defined as the reduction of the air flow.
NOx emission reduction in a hydrogen fueled internal combustion engine at 3000 rpm using exhaust gas recirculation[J].
NOx emission and performance data for a hydrogen fueled internal combustion engine at 1500 rpm using exhaust gas recirculation[J] Int.J.Hydrogen Energy,2003,28:901~908
Online since: June 2014
Authors: Rui Liu, Xiang Bin Zhai, Veronica Chua
However, if we want to reduce carbon emissions from TPP, then it’s necessary to compute the carbon emissions before and after installing the carbon emissions reduction device in order to compare the benefits and cost during the reduction process.
In the third method for energy, either detailed emission models or measurements of data at individual plant level are used where appropriate.
The theory of practical measurement mode is the measurement of the density of gaseous pollutant and the amount of pollutants from thermal power plants, at the same time the emission duration.EEA use the eq.2 to calculate total pollutant amount from measurement data
However, as each power plant has different emission factor, it means all of thermal power plants need established their own emission factor data base by following the technology progress and equipment replacement to revise their emission factor.
,Xiujun,Tian.and Rui,Chen.Analysis on Carbon Dioxide Emission and Reduction of Thermal Power Plant.
Online since: April 2011
Authors: Lan Yi Sun, Qing Song Li, Jin Chuan Xu, Jun Ting Wu
The advantages of this technology are energy conservation, pollution reduction, coke quality improvement and the full use of resources.
It provides a large amount of property data, rigorous thermodynamic model and a rich model library of unit operation.
In addition to the pyrolysis reaction, there are gasification- reduction reactions shown in reaction (2), (3) and (4)
This make the n-CDQ technology have the advantages of full use of resources while maintaining the traditional advantages of CDQ technology, for example energy conservation, pollution reduction and improvement of coke quality.
In another word, the simulation cannot accurately reflect the spontaneity of the reaction of coke pyrolysis and gasification- reduction in the CDQ furnace.
Online since: October 2014
Authors: Mohd Zaki Nuawi, Gigih Priyandoko, Mohamad Zairi Baharom
These four parameters are defined as the factors which contribute to the reduction of RPM speed as the effect.
It also replaces the function of stopwatch in the previous study by Gonzalez and increase the data precision.
These four independent factors react to the RPM speed reduction.
There were no significant evidence that number of electromagnet turns and disc thickness affected the speed reduction.
The highest speed reduction occurred at higher induced current and smallest air-gap between the electromagnetic pole and the disc.
Showing 5171 to 5180 of 40694 items