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Online since: February 2014
Authors: Xian Lei Xu, Yun Hai Xia, Feng Yang
For the time effectiveness and cost reasons, the data, including topographic maps in 1995 and 2000, stereo aerial images in 2005, and stereo IRS-P5images in 2007, are selected as the data source in this research.
According to the existing topographic maps and mining subsidence prediction data, the additional slope schematic diagrams of the Yanzhou coal mining area are acquired.
Results of the Demarcation The subsidence information data in different times are acquired by employing the analysis of overlay and differences of the DEM raster images at different phases in Arcgis.
The damaged cultivated land of the Yanzhou coal mining area is classified, including mild yield reduction area, moderate yield reduction area and out of yield area.
Dynamic monitoring of the land subsidence in mining area from multisource remote-sensing data – a case study at Yanzhou, China.
According to the existing topographic maps and mining subsidence prediction data, the additional slope schematic diagrams of the Yanzhou coal mining area are acquired.
Results of the Demarcation The subsidence information data in different times are acquired by employing the analysis of overlay and differences of the DEM raster images at different phases in Arcgis.
The damaged cultivated land of the Yanzhou coal mining area is classified, including mild yield reduction area, moderate yield reduction area and out of yield area.
Dynamic monitoring of the land subsidence in mining area from multisource remote-sensing data – a case study at Yanzhou, China.
Online since: May 2016
Authors: Anatoly S. Vereshchaka, Boris Ya. Mokritskii, Nikolay Sitnikov, Alexey Anatolevich Vereschaka, Julia Prilukova
It has been found out that the coating increases the antifriction properties of ceramics both due to lower coefficient of friction of the coating material and to reduction of roughness of rake face of the tool, and that is the main cause of 25% reduction in cutting force components for the coated tool, wherein the difference in cutting forces for the coated and uncoated tools is inversely proportional to the thickness of the slice.
The analysis of the data obtained suggests the following.
It is clear that the reduction of tool surface roughness can favourably affect the improvement of the surface friction properties and, consequently, improve contact processes occurring in the cutting zone.
The analysis of the data suggests the following.
It has been found out that the coating increases the antifriction properties of ceramics both due to lower coefficient of friction of the coating material and to reduction of roughness of rake face of the tool, and that is the main cause of 25% reduction in cutting force components for the coated tool, wherein the difference in cutting forces for the coated and uncoated tools is inversely proportional to the thickness of the slice.
The analysis of the data obtained suggests the following.
It is clear that the reduction of tool surface roughness can favourably affect the improvement of the surface friction properties and, consequently, improve contact processes occurring in the cutting zone.
The analysis of the data suggests the following.
It has been found out that the coating increases the antifriction properties of ceramics both due to lower coefficient of friction of the coating material and to reduction of roughness of rake face of the tool, and that is the main cause of 25% reduction in cutting force components for the coated tool, wherein the difference in cutting forces for the coated and uncoated tools is inversely proportional to the thickness of the slice.
Online since: October 2013
Authors: Xiao Ping Jin, Zheng He Song, Tong Zhang
Specific workflow models and data models are built to provide a collaborative platform for the product data management.
Increasing competition has forced manufactures to make considerable reductions in machine design and building cycles.
Sub-models are also defined according to the data requirements so as to ensure data consistency and rationality.
Product Data Retrieval and Query.
The workflow models and data models are built to provide a collaborative platform for the product data management.
Increasing competition has forced manufactures to make considerable reductions in machine design and building cycles.
Sub-models are also defined according to the data requirements so as to ensure data consistency and rationality.
Product Data Retrieval and Query.
The workflow models and data models are built to provide a collaborative platform for the product data management.
Online since: May 2014
Authors: Markus Bambach, Gerhard Hirt, Chris Mertin, Andreas Naumov, Linda Mosecker
Fig. 4 shows the measured data.
A reduction of 15 % from the FSW blanks results in a tensile strength Rm,FSW of 210 ±15 N/mm².
Annealing at 250 °C for 5 sec results in a reduction of the tensile strength (see Fig. 5).
As a result the FSW blanks show a reduction in tensile strength and hardness.
Based on the measured data, short time heat treatment experiments with three different temperatures 250, 350 and 450 °C using the aluminum base material were performed.
A reduction of 15 % from the FSW blanks results in a tensile strength Rm,FSW of 210 ±15 N/mm².
Annealing at 250 °C for 5 sec results in a reduction of the tensile strength (see Fig. 5).
As a result the FSW blanks show a reduction in tensile strength and hardness.
Based on the measured data, short time heat treatment experiments with three different temperatures 250, 350 and 450 °C using the aluminum base material were performed.
Online since: June 2012
Authors: Feng Shan Du, Min Ting Wang, Zhao Meng Huang, Xue Tong Li
Based on production data from a hot rolling factory, a 3D numerical simulation model for vertical-horizontal rolling is built and validated using rigid-plastic FEM in this study.
Along the slab length, the length of width loss increases with the width reduction, and the maximum length is about 1000mm when the lateral reduction is 100mm.
Setting the width reduction is 20mm, 40mm, 60mm, 80mm, 100mm; the thickness reduction is 35mm, 45mm, 55mm, respectively.
From the numerical simulation results, collect the data of width distribution and fit a quintic polynomial curve, then seek first-order derivative of the fitting curve, thus the coordinates of the four feature points can be get.
Thus the SSC velocity model is developed, which changes with the entrance width, the entrance thickness, the width reduction and the thickness reduction.
Along the slab length, the length of width loss increases with the width reduction, and the maximum length is about 1000mm when the lateral reduction is 100mm.
Setting the width reduction is 20mm, 40mm, 60mm, 80mm, 100mm; the thickness reduction is 35mm, 45mm, 55mm, respectively.
From the numerical simulation results, collect the data of width distribution and fit a quintic polynomial curve, then seek first-order derivative of the fitting curve, thus the coordinates of the four feature points can be get.
Thus the SSC velocity model is developed, which changes with the entrance width, the entrance thickness, the width reduction and the thickness reduction.
Online since: January 2013
Authors: Qing Chun Jon Zhang, Jennifer Duc, Van Mieczkowski, Brett Hull, Scott Allen, John W. Palmour
The much reduced field at the Schottky interface allows an increase in the drift doping concentration, which enables a significant chip size reduction on next generation SiC (Silicon Carbide) Schottky diodes.
The micro-pipe density on SiC has been routinely reduced to <1 cm2, along with a continuous reduction in threading dislocations.
The experimental data have proven out that the trench JBS design reduces the reverse leakage current significantly.
The reduction of the Schottky interface field in turn allows utilizing a highly doped drift layer to shrink the die size, or implementing a Schottky material with lower barrier height for lower Schottky turn-on voltage.
Significant chip size reduction on next generation SiC Schottky diodes has been achieved by utilizing the newly developed trench structure.
The micro-pipe density on SiC has been routinely reduced to <1 cm2, along with a continuous reduction in threading dislocations.
The experimental data have proven out that the trench JBS design reduces the reverse leakage current significantly.
The reduction of the Schottky interface field in turn allows utilizing a highly doped drift layer to shrink the die size, or implementing a Schottky material with lower barrier height for lower Schottky turn-on voltage.
Significant chip size reduction on next generation SiC Schottky diodes has been achieved by utilizing the newly developed trench structure.
Online since: January 2015
Authors: Fu Liang Jiang, Bo Lei, Guo Hui Li, Zeng Guang Yang, Sheng Yang Feng
Data collecting and processing
According to the influence factors of slope stability, we collected 45 groups’ typical examples.
Due to space limitations, this article only lists some of the data in Table 1, the complete data please see literature [8].
Six main factors which influence the stability of arc slope are rock density (), cohesion (), internal friction angle (), slope angle (), slope height () and pore pressure ratio (), safety factor () is determined by the parameters in the table, the data in Table 1 are original data.
The processed data please see Table 2.
Discrete data after normalization processing x1 1 0 2 2 0 1 0 x2 1 0 2 2 0 2 0 x3 1 0 2 2 0 0 0 x43 2 1 2 2 1 0 1 x44 2 1 2 2 1 0 1 x45 2 1 2 2 1 0 1 Attribute reduction and importance calculation After calculation, C1, C3, C4, C6 are the core attributes and C2, C5 are redundant attributes.
Due to space limitations, this article only lists some of the data in Table 1, the complete data please see literature [8].
Six main factors which influence the stability of arc slope are rock density (), cohesion (), internal friction angle (), slope angle (), slope height () and pore pressure ratio (), safety factor () is determined by the parameters in the table, the data in Table 1 are original data.
The processed data please see Table 2.
Discrete data after normalization processing x1 1 0 2 2 0 1 0 x2 1 0 2 2 0 2 0 x3 1 0 2 2 0 0 0 x43 2 1 2 2 1 0 1 x44 2 1 2 2 1 0 1 x45 2 1 2 2 1 0 1 Attribute reduction and importance calculation After calculation, C1, C3, C4, C6 are the core attributes and C2, C5 are redundant attributes.
Online since: October 2014
Authors: Irina V. Nikolaenko, Nikolay Kedin, Gennadii Shveikin
The full range of intermediate substances obtained during thermolysis, reduction and carbidization precursors to final products were presented.
Fine tungsten carbide powders can be obtained by several carbothermal methods involving the direct reduction of WO3, the main advantages of which are the rapid completion of the process and the absence of hazardous components during the hydrogen and subsequent carbon reduction [3]. 2.
According to the SEM data the precursor consists of lamellar crystals of tungstic acid uniformly distributed on the surface of acetylene soot spherical particles (Fig. 1).
At the different stages of reduction the formation of heterophase mixtures of the intermediate products is observed.
According to the XRD data the final product of carbidization is single-phase WC with hexagonal structure (Р-6m2, а= 2.906 Å, c= 2.837 Å).
Fine tungsten carbide powders can be obtained by several carbothermal methods involving the direct reduction of WO3, the main advantages of which are the rapid completion of the process and the absence of hazardous components during the hydrogen and subsequent carbon reduction [3]. 2.
According to the SEM data the precursor consists of lamellar crystals of tungstic acid uniformly distributed on the surface of acetylene soot spherical particles (Fig. 1).
At the different stages of reduction the formation of heterophase mixtures of the intermediate products is observed.
According to the XRD data the final product of carbidization is single-phase WC with hexagonal structure (Р-6m2, а= 2.906 Å, c= 2.837 Å).
Online since: September 2014
Authors: Qun Wang
The measuring principle of building lifecycle carbon emissions
The existing problems and data base.
Much more data which can be used to measure carbon emissions have been accumulated in the course of building carbon emissions research.
We also found that the resource consumptions cannot be quantified in other parts of the jobs, but we can get the data of their cost.
However, depending on the existing data and the method in this paper, the amount of carbon emissions for single buildings is not accurate.
In order to improve the accuracy of the model, we suggest that the emphatic aspects for further study should be focused on enriching the data.
Much more data which can be used to measure carbon emissions have been accumulated in the course of building carbon emissions research.
We also found that the resource consumptions cannot be quantified in other parts of the jobs, but we can get the data of their cost.
However, depending on the existing data and the method in this paper, the amount of carbon emissions for single buildings is not accurate.
In order to improve the accuracy of the model, we suggest that the emphatic aspects for further study should be focused on enriching the data.
Online since: September 2008
Authors: Nicolas G. Wright, Alton B. Horsfall, Rajat Mahapatra, Ming Hung Weng
Capacitance data pre and post
metallization annealing (PMA) at a selected
range of temperatures.
The distorted curves in the unannealed C-V data suggest the existence of fixed oxide charge (Qf).
Corresponding behaviour is also observed in the conductance data shown as a function of temperature in Figure 4.
G/ω-V data for the unannealed sample.
The corresponding G/ω data after annealing measured at 1MHz is shown in figure 5.
The distorted curves in the unannealed C-V data suggest the existence of fixed oxide charge (Qf).
Corresponding behaviour is also observed in the conductance data shown as a function of temperature in Figure 4.
G/ω-V data for the unannealed sample.
The corresponding G/ω data after annealing measured at 1MHz is shown in figure 5.