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Online since: January 2021
Authors: Mirosław Wróbel, Dorota Byrska-Wójcik, Andrij Milenin
In the process of continuous dieless drawing of carbon steel wire, Tiernan and Hillery [4] achieved uniform reductions of cross section up to 72% in a single pass.
The maximum achieved reduction in area was 30–40%.
A quantitative model of strain induced roughness can be presented based on experimental data using linear interpolation of the dependence of roughness on longitudinal strain: Rε=R0+εRmax-R0εmax, (3) where: R0 – initial roughness of the wire before dieless drawing; Rmax – strain induced roughness at maximum elongation depending on temperature (Fig. 8); εmax – the magnitude of the longitudinal strain preceding the breaking of the wire (Fig. 5), ε – current longitudinal strain in the dieless drawing.
The maximum achieved reduction in area was 30–40%.
A quantitative model of strain induced roughness can be presented based on experimental data using linear interpolation of the dependence of roughness on longitudinal strain: Rε=R0+εRmax-R0εmax, (3) where: R0 – initial roughness of the wire before dieless drawing; Rmax – strain induced roughness at maximum elongation depending on temperature (Fig. 8); εmax – the magnitude of the longitudinal strain preceding the breaking of the wire (Fig. 5), ε – current longitudinal strain in the dieless drawing.
Online since: September 2006
Authors: Wolfgang Nierlich, Juergen Gegner, Mandy Brückner
The reduction of the normalized
line width FWHM/B at the surface amounts to b/B≥0.77.
The data stem from rig tests with taper roller and ball bearings and can thus be correlated with statistical parameters of the failure distribution, e.g. bearing life related to 10 % failure percentage, L10.
The associated lifetime reduction conforms to the strength of the damage mechanism and can range from the lower fatigue strength region to material ratcheting in extreme cases.
The data stem from rig tests with taper roller and ball bearings and can thus be correlated with statistical parameters of the failure distribution, e.g. bearing life related to 10 % failure percentage, L10.
The associated lifetime reduction conforms to the strength of the damage mechanism and can range from the lower fatigue strength region to material ratcheting in extreme cases.
Online since: September 2013
Authors: Yu Han Xiong, Hong Hua
Reducing the energy consumption and carbon emissions of transportation industry has become an important task for China’s energy conservation and emission reduction.
“The Planning of Energy Conservation and Emission Reduction for Highway and Waterway Transportation in the 12th Five-year of China” presented the demonstration project of new energy vehicles and supported to replace and obsolete aging cars with new energy vehicles.
Firstly, Chengyang’s actual datum of 2010 and planning datum of 2015 is adopted to calculate “Urban Transportation Synthetical Low-carbonization Development Index (UTSLDI)”.
“The Planning of Energy Conservation and Emission Reduction for Highway and Waterway Transportation in the 12th Five-year of China” presented the demonstration project of new energy vehicles and supported to replace and obsolete aging cars with new energy vehicles.
Firstly, Chengyang’s actual datum of 2010 and planning datum of 2015 is adopted to calculate “Urban Transportation Synthetical Low-carbonization Development Index (UTSLDI)”.
Online since: July 2016
Authors: Pavel Svoboda, Helmut Kurth
Service Water
Although the water requirements of the individual construction processes are known, in practice these data are used only for such facilities as central concrete mixing plants, etc.
At the same time the design must solve the protection of wells in the proximity of the site and the influence of ground water level on vegetation; · assurance that the required water quantity is really delivered by the maintenance of water supply pipelines; · if permitted by construction technology, reduction of the paved areas to facilitate maximum rainwater infiltration; · not to put obstacles in the way of flood flows by the location of construction plant and temporary buildings, · generally speaking: not to increase the quantity of water drained off the site, but to try to put it to some use.
When designing contractor´s plant and site equipment it is necessary, in the first place, to provide the rainwater drainage, drainage trenches or mine water pumping systems with settling tanks serving the pre-treatment of waste water, based on the principle of flow velocity reduction enabling the settlement of insoluble materials in the sludge basin.
At the same time the design must solve the protection of wells in the proximity of the site and the influence of ground water level on vegetation; · assurance that the required water quantity is really delivered by the maintenance of water supply pipelines; · if permitted by construction technology, reduction of the paved areas to facilitate maximum rainwater infiltration; · not to put obstacles in the way of flood flows by the location of construction plant and temporary buildings, · generally speaking: not to increase the quantity of water drained off the site, but to try to put it to some use.
When designing contractor´s plant and site equipment it is necessary, in the first place, to provide the rainwater drainage, drainage trenches or mine water pumping systems with settling tanks serving the pre-treatment of waste water, based on the principle of flow velocity reduction enabling the settlement of insoluble materials in the sludge basin.
Online since: March 2015
Authors: Ahmad Hadri Husain, Noor Faisal Abas
Reduction in cement in the concrete mix can certainly help reduce the dependence on cement, which is one cause of global warming [7].
The complete data of this test is summarized for better analysis in Figure 1, which presents the result for the compressive strength that was obtained from all specimens.
As is widely reported, the typical order of a 10% reduction in compressive strength is compared to the normal concrete [18, 19].
The complete data of this test is summarized for better analysis in Figure 1, which presents the result for the compressive strength that was obtained from all specimens.
As is widely reported, the typical order of a 10% reduction in compressive strength is compared to the normal concrete [18, 19].
Online since: April 2014
Authors: Jiang Shan Ai, Xiao Hong Chen
From the experimental observations, the noise impact on the sampling vector S can increase with the reduction of distance between the acoustic source and the perpendicular bisectors of the segment connecting two nodes.
As shown in Fig. 2, the misestimating of the source sub-region increase with the reduction of distance between source and the perpendicular bisector.
Algorithms for position and data recovery in wireless sensor networks, Berkeley: University of California, (2000)
As shown in Fig. 2, the misestimating of the source sub-region increase with the reduction of distance between source and the perpendicular bisector.
Algorithms for position and data recovery in wireless sensor networks, Berkeley: University of California, (2000)
Online since: June 2014
Authors: Antonio Vizan Idoipe, Eduardo Díez Cifuentes, Jesus Perez Garcia, Hilde Pérez
In other words, a reduction in machining time.
In addition, the resultant reduction of cutting forces and vibrations enables an increase in the depth of cut or the length of the cutting tool, which is particularly advantageous in certain circumstances.
From the experiments carried out and from the data provided by tool manufacturers, it can be concluded that these cutting strategies are more suitable for harder workpiece materials.
In addition, the resultant reduction of cutting forces and vibrations enables an increase in the depth of cut or the length of the cutting tool, which is particularly advantageous in certain circumstances.
From the experiments carried out and from the data provided by tool manufacturers, it can be concluded that these cutting strategies are more suitable for harder workpiece materials.
Online since: July 2014
Authors: Lord Jaykishan Nayak, Dhaneshwar Mahto
Turbine blade cooling is necessary to avoid reduction of operating life due to oxidation, creep and thermal stress.
Reduction in inlet air temperature results in increase of mass flow rate.
INPUT DATA FOR ANALYSIS [5]: Parameter Symbol unit Parameter Symbol Unit Compressor (i) ηp,c=92.0 % HRSG (single (i) Phrsg= 50 bar (ii) ηm,c=98.5 % Pressure) (ii) Tpp=10 K Combustor (i) ηcomb =99.5 % (iii) Tstack(min.) =363 K (ii) ploss =2.0% of % (iv) Tsh(max.)=843 K entry Pressure (v) Pd =1.2 bar (iii) LHV=42 MJ/kg (iv) Pcond=0.05 bar Gas turbine (i) ηp,gt
Reduction in inlet air temperature results in increase of mass flow rate.
INPUT DATA FOR ANALYSIS [5]: Parameter Symbol unit Parameter Symbol Unit Compressor (i) ηp,c=92.0 % HRSG (single (i) Phrsg= 50 bar (ii) ηm,c=98.5 % Pressure) (ii) Tpp=10 K Combustor (i) ηcomb =99.5 % (iii) Tstack(min.) =363 K (ii) ploss =2.0% of % (iv) Tsh(max.)=843 K entry Pressure (v) Pd =1.2 bar (iii) LHV=42 MJ/kg (iv) Pcond=0.05 bar Gas turbine (i) ηp,gt
Online since: September 2017
Authors: Ming Hung Chen
The DSP converts the voltage signal into digital data, which are then used to determine the switching cycles by using a computer program.
Gundogan, Design of a high-efficiency 12V/1kW 3-phase BLDC motor drive system for diesel engine emissions reductions, 2013 IEEE in Energy Conversion Congress and Exposition (ECCE). (2013) 1077-1081
Yetkin, et al., Design of a High-Efficiency Minimum-Torque-Ripple 12-V/1-kW Three-Phase BLDC Motor Drive System for Diesel Engine Emission Reductions, IEEE Transactions on Vehicular Technology. 63 (2014) 3107-3115
Gundogan, Design of a high-efficiency 12V/1kW 3-phase BLDC motor drive system for diesel engine emissions reductions, 2013 IEEE in Energy Conversion Congress and Exposition (ECCE). (2013) 1077-1081
Yetkin, et al., Design of a High-Efficiency Minimum-Torque-Ripple 12-V/1-kW Three-Phase BLDC Motor Drive System for Diesel Engine Emission Reductions, IEEE Transactions on Vehicular Technology. 63 (2014) 3107-3115
Online since: March 2013
Authors: Piotr Szota, Henryk Dyja, Sebastian Mróz, Andrzej Stefanik
The roll surface temperature was assumed to be equal to 60°C based on thermovision measurements in industrial conditions and based on the data provided in reference [5].
In roll pass no. 3, the strain effective value in the vertex area is 0.8 due to the shaping of the ploughshare tip and reduction of the thickness.
In roll passes nos. 4 and 5, demand for the energy and force parameters is lower due to the fact that it is in these passes that the final shape is imparted to the ploughshare, and the preset rolling reduction are smaller.
In roll pass no. 3, the strain effective value in the vertex area is 0.8 due to the shaping of the ploughshare tip and reduction of the thickness.
In roll passes nos. 4 and 5, demand for the energy and force parameters is lower due to the fact that it is in these passes that the final shape is imparted to the ploughshare, and the preset rolling reduction are smaller.