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Online since: July 2015
Authors: Sattaya Yimprasert, Ananchai Ukaew
(2)
(3)
Where f and are the friction factors in the pipe and the specific weight of the water, the friction factor (f) is the main data we wanted to observe.
We analyzed our data by using Numerical Curve fitting in the exponential function [12], resulting in a new equation
From the calculations illustrated in Fig.4, we defined the hypothesis trend line of experiment data as an exponential function.
We then analyzed our data by curve fitting technique using the exponential function [12], to find the relationship between flow rate in a pipe and level of water.
From data of this study, when we using polymer solution in difference concentration in pipe flow at turbulent condition, we can increase flow rate in pipe because friction between pipe wall and fluid are decrease follow the hypothesis of Drag reduction effect, in this research can show the data in Fig.7, that is a relationship of friction factor (f) in y-axis and Reynolds number (Re) in x-axis, the result show effect of polymer solution can decrease friction factor immediately by this experiment best of polymer concentration is in 30 to 100 wppm because these friction factor are decrease in closely number compare with pure water, by percentages are 35, 45, 44 and 44 % at polymer concentrations are 10, 30, 50, 100 wppm.
We analyzed our data by using Numerical Curve fitting in the exponential function [12], resulting in a new equation
From the calculations illustrated in Fig.4, we defined the hypothesis trend line of experiment data as an exponential function.
We then analyzed our data by curve fitting technique using the exponential function [12], to find the relationship between flow rate in a pipe and level of water.
From data of this study, when we using polymer solution in difference concentration in pipe flow at turbulent condition, we can increase flow rate in pipe because friction between pipe wall and fluid are decrease follow the hypothesis of Drag reduction effect, in this research can show the data in Fig.7, that is a relationship of friction factor (f) in y-axis and Reynolds number (Re) in x-axis, the result show effect of polymer solution can decrease friction factor immediately by this experiment best of polymer concentration is in 30 to 100 wppm because these friction factor are decrease in closely number compare with pure water, by percentages are 35, 45, 44 and 44 % at polymer concentrations are 10, 30, 50, 100 wppm.
Online since: December 2006
Authors: Eui Jung Choi, Chan Lee, Jun Ho Lee, Woon Joo Yeo, Je Wook Chae
A Study on Bore-sighting for the Error Reduction of the XK11
Woon-Joo Yeo1, a
, Je-Wook Chae
1, b, Chan Lee
1, c
, Eui-Jung Choi1, d
and Jun-Ho Lee
1, e
1
Agency for Defense Development, Yuseong P.O.
Image processing method with Charged Coupled Device camera is chosen for the Error reduction of bore-sighting.
� Noise Reduction Erosion Erosion is used to get rid of the remained noises after Binary-Coded work
So dilation is used to restore the laser points reduced by the erosion for noise reduction
{ }ˆ( )z A B z B A ⊕ = ∩ ≠ ∅ (3) Labeling The work dividing the data cognized two laser points to only one color called Labeling.
Image processing method with Charged Coupled Device camera is chosen for the Error reduction of bore-sighting.
� Noise Reduction Erosion Erosion is used to get rid of the remained noises after Binary-Coded work
So dilation is used to restore the laser points reduced by the erosion for noise reduction
{ }ˆ( )z A B z B A ⊕ = ∩ ≠ ∅ (3) Labeling The work dividing the data cognized two laser points to only one color called Labeling.
Online since: October 2012
Authors: Hai Bo Huang, Ting Zhang, Xue Dao Shu
It is extremely meaningful to optimize the parameters for wear reduction to extend the mold life.
The Determination of Level Data.
According to the theoretical ranges of processing parameters listed in Table 1, the data package for CWR experiments are listed in Table 2, which considers three parameters, three levels[7].
C2, the radial reduction at second level, which .
The stretching angle is the prior considered factor for mold wear reduction , which should be as small as possible.
The Determination of Level Data.
According to the theoretical ranges of processing parameters listed in Table 1, the data package for CWR experiments are listed in Table 2, which considers three parameters, three levels[7].
C2, the radial reduction at second level, which .
The stretching angle is the prior considered factor for mold wear reduction , which should be as small as possible.
Optimization Scheduling of Cascade Hydropower Stations in Energy Conservation and Emission Reduction
Online since: August 2013
Authors: Ze Hong Li
The power structure optimization, energy conservation and emission reduction will become the two major focus.
Then, is hydropower of Guizhou will not be able to make new contributions to emissions reductions?
Therefore, centralized data exchanges have been adopted to resolve the problems of varied software and hardware compatibility, resource sharing and data security.
With the electric power data network as basic network and the satellite communication as standby network, the redundancy requirement of different networks has been satisfied.
Acting as a communication bridge, the data exchange platform has been developed to connect automation systems in centralized control center.
Then, is hydropower of Guizhou will not be able to make new contributions to emissions reductions?
Therefore, centralized data exchanges have been adopted to resolve the problems of varied software and hardware compatibility, resource sharing and data security.
With the electric power data network as basic network and the satellite communication as standby network, the redundancy requirement of different networks has been satisfied.
Acting as a communication bridge, the data exchange platform has been developed to connect automation systems in centralized control center.
Online since: February 2019
Authors: Yosuke Iijima, Yasushi Yuminaka
Figure 1 shows an eye-diagram of a Pulse Amplitude Modulation (PAM)-4 data transmission on a micro-strip line.
To calculate the data at twice the symbol rate, the transmit data is held for T sec by a delay element.
Figure 4 shows the simulation results of a PAM-4 data transmission using DTHP at 2 GS/s (Symbol/sec) on a 1-m-long micro-strip line.
The transmitter data can be demodulated at receiver by using modulo reduction.
Yuminaka, “Double Rate Equalization Using Tomlinson-Harashima Precoding for Multi-Valued Data Transmission,” Proc.
To calculate the data at twice the symbol rate, the transmit data is held for T sec by a delay element.
Figure 4 shows the simulation results of a PAM-4 data transmission using DTHP at 2 GS/s (Symbol/sec) on a 1-m-long micro-strip line.
The transmitter data can be demodulated at receiver by using modulo reduction.
Yuminaka, “Double Rate Equalization Using Tomlinson-Harashima Precoding for Multi-Valued Data Transmission,” Proc.
Online since: July 2015
Authors: Yong Shi, Fang Hong Xue, Hao Zhang, Chun Yan Li
The classical metal-organic Frameworks CuBTC showed remarkable low temperature activity in selective catalytic reduction of NO with NH3 (NH3-SCR).
The nature of the active Cu species among CuBTC in NH3-SCR based on the activity data were characterized by TEM, XPS, XRD, EPR and IR.
In this paper, CuBTC was synthesized by hydrothermal method and used for selective catalytic reduction of NO with NH3.
The activity data was recorded when the catalytic reaction practically reached steady-state condition at each temperature.
Conclusions The CuBTC catalysts showed remarkable low temperature activity in selective catalytic reduction of NO with NH3.
The nature of the active Cu species among CuBTC in NH3-SCR based on the activity data were characterized by TEM, XPS, XRD, EPR and IR.
In this paper, CuBTC was synthesized by hydrothermal method and used for selective catalytic reduction of NO with NH3.
The activity data was recorded when the catalytic reaction practically reached steady-state condition at each temperature.
Conclusions The CuBTC catalysts showed remarkable low temperature activity in selective catalytic reduction of NO with NH3.
Online since: May 2020
Authors: Vladimir A. Gol'tsev, Vyacheslav A. Dudko, Boris P. Yur'ev
The middle zone – is the reduction one.
Content, % Reduction Degree, % Notes Fetotal FeO S CaO SiO2 MgO Femet. 1 56,3 38,6 0,05 0,5 2,5 17,5 – 18 Whole lump average sample 2 60,2 48,2 N/A 6,0 3,6 22,9 26,5 58,2 Upper layer 61,3 64,0 0,004 5,2 3,7 22,6 24,7 60,0 Intermediate layer 58,3 55,1 0,003 5,2 3,7 22,6 17,7 51,0 Lump core 3 64,5 51,5 0,005 0,5 0,2 24,7 24,8 58,5 Whole lump average sample It follows from data of Table 3 that decomposition in argon atmosphere results in FeO and Fe3O4 oxide mixture with the composition of .
The obtained results agree completely with the work data [2].
As is seen from data of Table 3, ferrous oxide content increases and the metallic iron decreases from the sample surface to the center, what is indicative of significant diffusion resistance in the ore sample with the size of 45 – 50 mm.
Experiments were carried out to obtain data on the ore firing in the neutral atmosphere (argon) on the samples with the dimensions of 12 – 15 mm.
Content, % Reduction Degree, % Notes Fetotal FeO S CaO SiO2 MgO Femet. 1 56,3 38,6 0,05 0,5 2,5 17,5 – 18 Whole lump average sample 2 60,2 48,2 N/A 6,0 3,6 22,9 26,5 58,2 Upper layer 61,3 64,0 0,004 5,2 3,7 22,6 24,7 60,0 Intermediate layer 58,3 55,1 0,003 5,2 3,7 22,6 17,7 51,0 Lump core 3 64,5 51,5 0,005 0,5 0,2 24,7 24,8 58,5 Whole lump average sample It follows from data of Table 3 that decomposition in argon atmosphere results in FeO and Fe3O4 oxide mixture with the composition of .
The obtained results agree completely with the work data [2].
As is seen from data of Table 3, ferrous oxide content increases and the metallic iron decreases from the sample surface to the center, what is indicative of significant diffusion resistance in the ore sample with the size of 45 – 50 mm.
Experiments were carried out to obtain data on the ore firing in the neutral atmosphere (argon) on the samples with the dimensions of 12 – 15 mm.
Online since: July 2011
Authors: Marek Sibielak, Waldemar Rączka, Jarosław Konieczny
The parameters of the spring model have been determined, based on the experimental data.
The mathematical model developed may be applied in the design of passive, semi-active, and active vibration reduction systems, as well as in the synthesis of adaptive smart vibration reduction systems.
Shape memory alloys are also used as actuators in active vibration reduction systems.
This article discusses the use of SMA springs in vibration reduction systems.
Et=cA2ω202πωcos2ωtdt=cA2ωπ (7) Therefore, the damping coefficient may be determined on the basis of formula (8), where energy Et has been determined on the basis of experimental data.
The mathematical model developed may be applied in the design of passive, semi-active, and active vibration reduction systems, as well as in the synthesis of adaptive smart vibration reduction systems.
Shape memory alloys are also used as actuators in active vibration reduction systems.
This article discusses the use of SMA springs in vibration reduction systems.
Et=cA2ω202πωcos2ωtdt=cA2ωπ (7) Therefore, the damping coefficient may be determined on the basis of formula (8), where energy Et has been determined on the basis of experimental data.
Online since: April 2011
Authors: Seshadri Seetharaman, Hesham M. Ahmed, Nurni N. Viswanathan
They reported that the porosity of iron changes from 20 to 62% upon reduction.
However, it is possible to make a reasonable approximation to explain the experimental data.
Thermal diffusivity changes with the progress of NiWO4 reduction.
Summary of data on time dependence of diffusivity changes Temperature, K Initial diffusivity, α0 x 106 cm2s-1 Final diffusivity, αt x 106 cm2s-1 Time to completion, min Incubation time, min 973 0.0058 0.0141 120 22 1048 0.0053 0.0161 110 14 1123 0.0051 0.0161 98 6 1198 0.0038 0.0159 49 2 1273 0.0036 0.0159 41 2 The activation energy of the reduction of NiWO4 was calculated by an Arrhenius plot using the isothermal reduction rates, which can be represented by the change in thermal diffusivity, at different temperatures.
Arrhenius plot for the reduction of NiWO4.
However, it is possible to make a reasonable approximation to explain the experimental data.
Thermal diffusivity changes with the progress of NiWO4 reduction.
Summary of data on time dependence of diffusivity changes Temperature, K Initial diffusivity, α0 x 106 cm2s-1 Final diffusivity, αt x 106 cm2s-1 Time to completion, min Incubation time, min 973 0.0058 0.0141 120 22 1048 0.0053 0.0161 110 14 1123 0.0051 0.0161 98 6 1198 0.0038 0.0159 49 2 1273 0.0036 0.0159 41 2 The activation energy of the reduction of NiWO4 was calculated by an Arrhenius plot using the isothermal reduction rates, which can be represented by the change in thermal diffusivity, at different temperatures.
Arrhenius plot for the reduction of NiWO4.
Online since: November 2012
Authors: Huan Liu, Chang Zheng Chen, Hao Zhou
On the base of measuring data, the noise resource is analyzed and the character of the noise resource is discussed.
Perfect effects of noise reduction can be obtained in the working project.
Table 1 is the measurement of sound data.
From the test data could be drawn, cooling tower near point1 to point10 average noise reached 72.8dB ( A ), and with the increase of distance, the energy of noise attenuation is slow.
Therefore decided to install muffler at the fan exit so as to achieve the purpose of the noise reduction.
Perfect effects of noise reduction can be obtained in the working project.
Table 1 is the measurement of sound data.
From the test data could be drawn, cooling tower near point1 to point10 average noise reached 72.8dB ( A ), and with the increase of distance, the energy of noise attenuation is slow.
Therefore decided to install muffler at the fan exit so as to achieve the purpose of the noise reduction.