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Online since: April 2018
Authors: Alexander P. Ilyin, Andrey V. Korshunov, Pavel Yu. Chumerin, Andrei V. Mostovshchikov, Ivan Kalinich
The reduction of aluminum oxide can be carried out by annealing the oxide in a reducing environment.
Moreover, aluminum oxide reduction is possible under microwave irradiation [2] in the presence of a reducing agent.
Average content of metal Al in nanopowder samples (wt. %) according to volumetric measurements (samples mass 15-25 mg) It follows from the obtained data (Fig. 3) that after exposure to microwave radiation and electron beam the content of metal Al is higher than in non-irradiated and annealed samples of aluminum nanopowder.
Such an effect can be explained by reduction of Al oxide in the oxide-hydroxide shell of the nanoparticles to form metal Al.
These exothermic reactions of the reduction process occur in the oxide film of Al nanoparticles.
Moreover, aluminum oxide reduction is possible under microwave irradiation [2] in the presence of a reducing agent.
Average content of metal Al in nanopowder samples (wt. %) according to volumetric measurements (samples mass 15-25 mg) It follows from the obtained data (Fig. 3) that after exposure to microwave radiation and electron beam the content of metal Al is higher than in non-irradiated and annealed samples of aluminum nanopowder.
Such an effect can be explained by reduction of Al oxide in the oxide-hydroxide shell of the nanoparticles to form metal Al.
These exothermic reactions of the reduction process occur in the oxide film of Al nanoparticles.
Online since: February 2011
Authors: Song Xue, Bin Xu, Yu Bin Lu, Guang Ming Li, Bei Ping Xiang
Yet several investigations show the viscosity of melt decreases with the reduction of micro channel characteristic size, but there has been no sufficient experimental data for the conclusion.
The inadequacy might be attributed to the rheological data used in the current simulation packages which are obtained from measurements of macroscopic scale.
Although there is some evidence indicating that the polymer melt flows in micro channels differ from those in macro geometries and the viscosity of melt decreases with the reduction of micro channel characteristic size, there has been no sufficient experimental data for the conclusion till now.
The results indicated that the viscosity of polymer melt flowing through micro channel increases with the reduction of characteristic size of micro channel.
For Non-Newtonian fluids, two corrections are commonly applied to capillary data to obtain the correct viscosity of polymeric fluids.
The inadequacy might be attributed to the rheological data used in the current simulation packages which are obtained from measurements of macroscopic scale.
Although there is some evidence indicating that the polymer melt flows in micro channels differ from those in macro geometries and the viscosity of melt decreases with the reduction of micro channel characteristic size, there has been no sufficient experimental data for the conclusion till now.
The results indicated that the viscosity of polymer melt flowing through micro channel increases with the reduction of characteristic size of micro channel.
For Non-Newtonian fluids, two corrections are commonly applied to capillary data to obtain the correct viscosity of polymeric fluids.
Online since: March 2015
Authors: Chuan Liu, Chang Shu, Bao Shou Sun, Cheng Chao
Table 1 The level code table of closed type CWR shaft end concavity affect factors
The Influence Rules of Forming Angle on the End Quality in Closed CWR
According to the statistical data, it has drawn the chart about the depth values of concavity related to the variation of forming angle as shown in the Figure 4.From the figure,it is obvious that the depth values of concavity decrease along with the increasing of forming angles,when the forming angle is 20°,the depth value decreases by 6.94% which is not enough great.
Fig.4 The length of concavity along with the change of forming angle α β=5° (b)ψ=50% (c)D=40mm The Influence Rules of Broadening Angle on the End Quality in Closed CWR Writer has obtained the depth values of concavity under the influence of different broadening angles by simulation[5].According to the statistical data, it has drawn the chart about the depth values of concavity related to the variation of broadening angle as shown in the Figure 5.From the figure,it is obvious that the depth values of concavity decrease along with the increasing of broadening angle,when the broadening angle is 4°,the length of concavity is 7.96mm,while the broadening angle is 8°,the depth value decreases by 13.44%.
Fig.5 The length of concavity along with the change of broadening angle β (a) α=26° (b)ψ=50% (c)D=40mm The Influence Rules of Are's Reduction on the End Quality in Closed CWR Writer has obtained the length values of concavity under the influence of different reduction of area by simulation[5].According to the statistical data, it has drawn the chart about the depth values of concavity related to the variation of reduction of area as shown in the Figure 6.
From the figure,it is obvious that when the reduction of area ψ is varying from 30% to 40%,the length of concavity becomes larger along with the reduction of area ψ increasing.When the reduction of area ψ is varying from 50% to 70%,the length of concavity becomes larger along with the reduction of area ψ decreasing.And when the reduction of area is 40%,the length of concavity is the maximum as 7.81mm,while the reduction of area is 30%,the length of concavity decreases by 17.67%.
However,the inner metal in the end of shaft is going to reduce under the influence of reduction of area being larger,as a result,the radial compression which is acted on the surface of shaft's end is becoming smaller and smaller,then the displacement between surficial metal and inner metal is going to be smaller and smaller.[6] Fig.6 The concavity along with reduction of area ψ (a)α=26° (b)β=5° (c)D=40mm The Influence Rules of Billet Diameter on the End Quality in Closed CWR Writer has obtained the length values of concavity under the influence of billet diameter by simulation[5].According to the statistical data, it has drawn the chart about the depth values of concavity related to the variation of reduction of area as shown in the Figure 7.
Fig.4 The length of concavity along with the change of forming angle α β=5° (b)ψ=50% (c)D=40mm The Influence Rules of Broadening Angle on the End Quality in Closed CWR Writer has obtained the depth values of concavity under the influence of different broadening angles by simulation[5].According to the statistical data, it has drawn the chart about the depth values of concavity related to the variation of broadening angle as shown in the Figure 5.From the figure,it is obvious that the depth values of concavity decrease along with the increasing of broadening angle,when the broadening angle is 4°,the length of concavity is 7.96mm,while the broadening angle is 8°,the depth value decreases by 13.44%.
Fig.5 The length of concavity along with the change of broadening angle β (a) α=26° (b)ψ=50% (c)D=40mm The Influence Rules of Are's Reduction on the End Quality in Closed CWR Writer has obtained the length values of concavity under the influence of different reduction of area by simulation[5].According to the statistical data, it has drawn the chart about the depth values of concavity related to the variation of reduction of area as shown in the Figure 6.
From the figure,it is obvious that when the reduction of area ψ is varying from 30% to 40%,the length of concavity becomes larger along with the reduction of area ψ increasing.When the reduction of area ψ is varying from 50% to 70%,the length of concavity becomes larger along with the reduction of area ψ decreasing.And when the reduction of area is 40%,the length of concavity is the maximum as 7.81mm,while the reduction of area is 30%,the length of concavity decreases by 17.67%.
However,the inner metal in the end of shaft is going to reduce under the influence of reduction of area being larger,as a result,the radial compression which is acted on the surface of shaft's end is becoming smaller and smaller,then the displacement between surficial metal and inner metal is going to be smaller and smaller.[6] Fig.6 The concavity along with reduction of area ψ (a)α=26° (b)β=5° (c)D=40mm The Influence Rules of Billet Diameter on the End Quality in Closed CWR Writer has obtained the length values of concavity under the influence of billet diameter by simulation[5].According to the statistical data, it has drawn the chart about the depth values of concavity related to the variation of reduction of area as shown in the Figure 7.
Online since: August 2013
Authors: Jian Bin Ye, Zhi Yan Ding, Qi Zhu
Station energy efficient management system acquires and stores real-time energy consumption data of field devices by field bus.
The layer is a bridge between application layer and resource layer or external systems, and it separates data coupling of the two, and has data acquisition and access function.
It encapsulates access interface to resource layer, and ensures that the system will not depend on specific data source. 4) Resource Layer.
The data that generates from system interior or comes from other external systems is finally stored in the local database.
The peak and valley situation of energy demand data are vividly shown by way of graphics.
The layer is a bridge between application layer and resource layer or external systems, and it separates data coupling of the two, and has data acquisition and access function.
It encapsulates access interface to resource layer, and ensures that the system will not depend on specific data source. 4) Resource Layer.
The data that generates from system interior or comes from other external systems is finally stored in the local database.
The peak and valley situation of energy demand data are vividly shown by way of graphics.
Online since: March 2006
Authors: Ja Choon Koo, Y.S. Han, Sean W. Kang, Yeon Sun Choi
And it is the most expensive budget consumer so that controlling of the
flutter becomes the primary design issue of the data storage industry.
Furthermore the higher rotating speed requirement for the faster data throughput aggravates the fluttering situation in common integration of the modern rotating-disk-type data storage devices.
Although many digital data storage field researchers equipped with cutting edge computational resources are focusing on the development of an effective analysis tool, the given complexity of the rotor and fluid interaction physics hampers the enhancement efforts and the outcome usually becomes ad hoc.
Recognized advantages of the LES for the transient turbulent problems and the effectiveness of the squeeze film damper for the reduction of flutter of the rotating data storage devices, few of publications are available for the combined studies of damper design and air flow excitation by the numerical analysis models.
A theoretical study about LES from the digital data storage systems point of view has been presented.
Furthermore the higher rotating speed requirement for the faster data throughput aggravates the fluttering situation in common integration of the modern rotating-disk-type data storage devices.
Although many digital data storage field researchers equipped with cutting edge computational resources are focusing on the development of an effective analysis tool, the given complexity of the rotor and fluid interaction physics hampers the enhancement efforts and the outcome usually becomes ad hoc.
Recognized advantages of the LES for the transient turbulent problems and the effectiveness of the squeeze film damper for the reduction of flutter of the rotating data storage devices, few of publications are available for the combined studies of damper design and air flow excitation by the numerical analysis models.
A theoretical study about LES from the digital data storage systems point of view has been presented.
Online since: April 2014
Authors: Da Bo Liu, Bo Cheng, Lei Guan
Distributions of the grain boundary misorientation angles of the initial and cold rolled samples are determined from the EBSD data as shown in Fig. 3.
As rolling reduction increases, the frequencies of both and twinning decease.
Specifically, the fraction of low angle boundaries is 25% after 10% reduction and increases significantly to 54% after 31% reduction.
However, the fraction of (component B) decreases with increasing rolling reduction.
Small rolling reduction (≤ 10%) activates the basal slip primarily.
As rolling reduction increases, the frequencies of both and twinning decease.
Specifically, the fraction of low angle boundaries is 25% after 10% reduction and increases significantly to 54% after 31% reduction.
However, the fraction of (component B) decreases with increasing rolling reduction.
Small rolling reduction (≤ 10%) activates the basal slip primarily.
Online since: September 2018
Authors: Anatoly Kh. Adzhiev, Buzigit M. Khuchunaev, Fatima E. Kanametova
The analysis of the water-salt balance data in the Bolshoi Tambukan lake within the period 1972-2015 is performed.
Methodology In this work we analyzed the data of the lake water-salt balance from 1972 till 2015, we have carried out recession analysis of the collected data, which fragments are presented in the Table 1.
Morphological parameters year 1973 1978 1984 1989 2004 2008 Water volume (million m3) 0.71 1.56 3.15 4.83 8.58 9.31 Average-annual value of mineralization (g/l) 78 50 43 29 28 27 1 – experimental data, 2 – theoretical calculations.
The curves on the picture are fixed according to the collected data and with the help of the statement (1).
Month and annual precipitations on the lake flat water are measured according to the observation data at the Tambukan meteorological station, located on the north-eastern side of the lake.
Methodology In this work we analyzed the data of the lake water-salt balance from 1972 till 2015, we have carried out recession analysis of the collected data, which fragments are presented in the Table 1.
Morphological parameters year 1973 1978 1984 1989 2004 2008 Water volume (million m3) 0.71 1.56 3.15 4.83 8.58 9.31 Average-annual value of mineralization (g/l) 78 50 43 29 28 27 1 – experimental data, 2 – theoretical calculations.
The curves on the picture are fixed according to the collected data and with the help of the statement (1).
Month and annual precipitations on the lake flat water are measured according to the observation data at the Tambukan meteorological station, located on the north-eastern side of the lake.
Online since: October 2014
Authors: Qing Yang, Xue Min Yao, Ze Jun Liu
Introduction
The weather forecast has a very important role in disaster prevention and reduction, economic construction, social development and national defense construction.
System processing The meteorological data sharing processing data flow is as shown in Figure 1, and the meteorological database storage data is for query platform use, and the data query platform can form drawing according to different types of meteorological data.
System data analysis The meteorological data material is mainly divided into: original meteorological observation data and numerical forecast products.
Reading file header and data.
Reading data from buffer, analyzing data and obtaining data.
System processing The meteorological data sharing processing data flow is as shown in Figure 1, and the meteorological database storage data is for query platform use, and the data query platform can form drawing according to different types of meteorological data.
System data analysis The meteorological data material is mainly divided into: original meteorological observation data and numerical forecast products.
Reading file header and data.
Reading data from buffer, analyzing data and obtaining data.
Online since: January 2022
Authors: Vijayabaskar Narayanamurthy, Kanakadandi Gopinath, Yendluri Venkata Daseswara Rao
This constitutive data is used in the numerical simulations.
The reduction in thickness due to stretching of the thin steel disc is evaluated from experiment and simulations.
The mean true stress-strain curve (Fig. 2(c)) derived from the mean engineering stress-strain curve data from the test results is considered for numerical simulations in explicit FEA.
The reduction in the thickness measured after experiment varied from 7.6% at r = 0 to 0 % at r = 0.96rmax.
There is a reasonable agreement between the experiment and simulation on the reduction sheet thickness.
The reduction in thickness due to stretching of the thin steel disc is evaluated from experiment and simulations.
The mean true stress-strain curve (Fig. 2(c)) derived from the mean engineering stress-strain curve data from the test results is considered for numerical simulations in explicit FEA.
The reduction in the thickness measured after experiment varied from 7.6% at r = 0 to 0 % at r = 0.96rmax.
There is a reasonable agreement between the experiment and simulation on the reduction sheet thickness.
Online since: March 2013
Authors: Jun Wu, Luo Zhong
On the other hand, there is much more complexity aspects which are mixed application of the graphical data, the image data, the attribute data and some others.
This paper will focus on the exploitation of Data Collection and Data Aggregation.
Data Aggregation As Data Aggregation [6], it is to make reduction process by local processing, the amount of data to be transmitted.
With the development of data mining and academic research about the data warehouse, it is easy to build the data system with the OLAP (on-line analytical processing).
Accurate data aggregation for VANETs.
This paper will focus on the exploitation of Data Collection and Data Aggregation.
Data Aggregation As Data Aggregation [6], it is to make reduction process by local processing, the amount of data to be transmitted.
With the development of data mining and academic research about the data warehouse, it is easy to build the data system with the OLAP (on-line analytical processing).
Accurate data aggregation for VANETs.