Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: November 2013
Authors: Wan You Tang, Zhen Rong Wang, Rui Xue Jiang
The single data gathered by the color liner CCD is related to the hardware parameters of resolution, this determine that the data quantity is fixed value[1].
When the speed of printing is slow, the data position of the single line in manuscript corresponds to the scanning image.
To confirm M steps as fellow: User sets initial M value includes three principles: single line M should not be higher than the sum of RGB data value in one line, single row M should be less than the sum of the RGB data value in one row, M of the whole image should be less than the sum of the RGB data value of whole image.
Using the sequential similarity to match the scanning image and manuscript, the suitable situation is the amount data of the scanning image being larger than the manuscript.
It is indicated that the scanning image and manuscript’s data are closer on average gradient and unitary gray entropy, but for other aspects also have gap.
When the speed of printing is slow, the data position of the single line in manuscript corresponds to the scanning image.
To confirm M steps as fellow: User sets initial M value includes three principles: single line M should not be higher than the sum of RGB data value in one line, single row M should be less than the sum of the RGB data value in one row, M of the whole image should be less than the sum of the RGB data value of whole image.
Using the sequential similarity to match the scanning image and manuscript, the suitable situation is the amount data of the scanning image being larger than the manuscript.
It is indicated that the scanning image and manuscript’s data are closer on average gradient and unitary gray entropy, but for other aspects also have gap.
Online since: July 2012
Authors: Shou Quan Wang, Wei Feng, Wei Bo Guo
However this merit is obtained at the cost of losing the details of volume data.
Volume rendering reconstructs the 3D object with the 3D volume data and voxels become the basic units.
The distribution of these physical properties is computed for the whole 3D data field to get the rendering result.
For the standard Marching Cubes there are generalizations that can be applied to adaptively refined 3D data.
“Display of Surfaces from Volume Data.IEEE Computer Graphics and Applications”, 1988, 8(3): pp. 29-37
Volume rendering reconstructs the 3D object with the 3D volume data and voxels become the basic units.
The distribution of these physical properties is computed for the whole 3D data field to get the rendering result.
For the standard Marching Cubes there are generalizations that can be applied to adaptively refined 3D data.
“Display of Surfaces from Volume Data.IEEE Computer Graphics and Applications”, 1988, 8(3): pp. 29-37
Online since: March 2013
Authors: Sheng Qian Ma, Man Hong Fan
It contains the circuit of gain control, data acquisition, potential instrument and program controlled voltage source.
Micro current detecting is a basic requirement for detecting voltage strictly unidirectional, namely the probe only generates oxidation or reduction.
MAX532 and ARM microprocessor compatible with SPI bus, the 24 bit serial to parallel shift register write 38 bit byte, under the control of software, the predetermined value by controller’s I/O port is sent to the D/A converter which is converted to corresponding analog output voltage. 3 Design of data acquisition circuit Fig.6 Data acquisition circuit In the micro current detecting circuit, AD620 instrumentation amplifier output voltage needs to be converted into digital quantity into the controller to handle.
Table2 is the use of electrolytic cell equivalent circuit was measured in a group of data, R7 =1M, R8 =10K, G = 1.
The system not only improves the acquisition speed and precision of experimental data, while avoiding the many defects of manual operation, and reducing the labor intensity under the condition of the long time experiment, but also reflects more sensitivity the relation of current voltage and wavelength of electrochemical cell from the experimental results, the system also has the advantages of high efficiency of analysis, great treatment to problems, and very good reliability.
Micro current detecting is a basic requirement for detecting voltage strictly unidirectional, namely the probe only generates oxidation or reduction.
MAX532 and ARM microprocessor compatible with SPI bus, the 24 bit serial to parallel shift register write 38 bit byte, under the control of software, the predetermined value by controller’s I/O port is sent to the D/A converter which is converted to corresponding analog output voltage. 3 Design of data acquisition circuit Fig.6 Data acquisition circuit In the micro current detecting circuit, AD620 instrumentation amplifier output voltage needs to be converted into digital quantity into the controller to handle.
Table2 is the use of electrolytic cell equivalent circuit was measured in a group of data, R7 =1M, R8 =10K, G = 1.
The system not only improves the acquisition speed and precision of experimental data, while avoiding the many defects of manual operation, and reducing the labor intensity under the condition of the long time experiment, but also reflects more sensitivity the relation of current voltage and wavelength of electrochemical cell from the experimental results, the system also has the advantages of high efficiency of analysis, great treatment to problems, and very good reliability.
Online since: August 2015
Authors: Kunagorn Kunavut
Introduction
In offshore area, communication channels are necessary for exchanging data between various terminals and Base Station (BS) which behaves as the gateway to connect them to the organization computing resources (e.g. data storage and servers).
For example, the petroleum exploration and production companies require to exchange Supervisory Control and Data Acquisition (SCADA) data between wellhead and supervisory system at oil drilling platform (or onshore station).
However, data transmission over satellite link is very expensive and slow.
Because of this reason, it is only applicable for limited number of terminals with low-speed data transmission where delay is not significant.
Moreover, BWA is also a cost-effective solution for data transmission and voice communication in offshore territory.
For example, the petroleum exploration and production companies require to exchange Supervisory Control and Data Acquisition (SCADA) data between wellhead and supervisory system at oil drilling platform (or onshore station).
However, data transmission over satellite link is very expensive and slow.
Because of this reason, it is only applicable for limited number of terminals with low-speed data transmission where delay is not significant.
Moreover, BWA is also a cost-effective solution for data transmission and voice communication in offshore territory.
Online since: April 2014
Authors: Amir Amini, Pejman Shabani, Mohsen Gharesi
Different methods have been used to compensate the effect of humidity, which usually require utilization of other parallel environmental sensors and costly data fusion methodology.
It is shown that by utilizing the “thermal shock-induction” method for the temperature modulation of the sensor, the drift levels are low, and with a single set of training data collected at RH=50%, responses obtained in the whole humidity range can be discriminated from each other.
The influence of drift-like terms such as temperature and humidity caused by environmental fluctuations can severely affect the responses of a metal oxide gas sensor [11,12] and this can induce significant variations in the calibration data.
The method introduced in the reference [10] was utilized for feature vector formation and dimension reduction.
It is shown that by utilizing the “thermal shock-induction” method for the temperature modulation of the sensor, the drift levels are low, and with a single set of training data collected at RH=50%, responses obtained in the whole humidity range can be discriminated from each other.
The influence of drift-like terms such as temperature and humidity caused by environmental fluctuations can severely affect the responses of a metal oxide gas sensor [11,12] and this can induce significant variations in the calibration data.
The method introduced in the reference [10] was utilized for feature vector formation and dimension reduction.
Online since: October 2014
Authors: Nor F. Za’bah, Kelvin S.K. Kwa, Anthony O'Neill
The data obtained had suggested that the doping distribution in the silicon nanowires were lower and this may have been affected by the surface depletion effect.
Based on the sheet resistance data, the range of the resistivity values after the self-doping process is between 0.012 to 0.015 ohm-cm.
Fig. 2 - The four-point probe data distribution for each silicon nanowire length.
According to the data distribution shown in Fig. 4, the carrier densities are lower than the doping concentration of the sample.
Summary The experimental data had suggested that doping distribution in the silicon nanowires were lower and it has been suggested that one of the reason is due to the surface depletion effect.
Based on the sheet resistance data, the range of the resistivity values after the self-doping process is between 0.012 to 0.015 ohm-cm.
Fig. 2 - The four-point probe data distribution for each silicon nanowire length.
According to the data distribution shown in Fig. 4, the carrier densities are lower than the doping concentration of the sample.
Summary The experimental data had suggested that doping distribution in the silicon nanowires were lower and it has been suggested that one of the reason is due to the surface depletion effect.
Online since: May 2011
Authors: Igor V. Alexandrov, Roza G. Chembarisova, M.I. Latypov
In case of NS materials it leads to intensification of dislocation density reduction in grain boundaries due to increasing ratio between the grain surface and its volume and shortening of diffusion distances.
The additives in the second brackets in the Eq. 4 define the rate of dislocation density reduction in the material.
The last additive in the Eq. 4 describes the rate of lattice dislocation density reduction in the grain boundaries.
The coefficients considering the described processes of the dislocation density reduction in the evolution equation are determined as
Results of modeling and discussion Experimental data [2] obtained for hot-pressed samples of the alloy Al 6061 (Mg 0.8…1.2, Si 0.4…0.8, Cu 0.15…0.40, Cr 0.15…0.35, Mn 0.15, Fe 0.7, Zn 0.25, Ti 0.15 wt. %) annealed at 530 ˚С with 2-hour holding and ice-water-cooled were applied for computational modeling.
The additives in the second brackets in the Eq. 4 define the rate of dislocation density reduction in the material.
The last additive in the Eq. 4 describes the rate of lattice dislocation density reduction in the grain boundaries.
The coefficients considering the described processes of the dislocation density reduction in the evolution equation are determined as
Results of modeling and discussion Experimental data [2] obtained for hot-pressed samples of the alloy Al 6061 (Mg 0.8…1.2, Si 0.4…0.8, Cu 0.15…0.40, Cr 0.15…0.35, Mn 0.15, Fe 0.7, Zn 0.25, Ti 0.15 wt. %) annealed at 530 ˚С with 2-hour holding and ice-water-cooled were applied for computational modeling.
Online since: March 2011
Authors: Hou Guo Fang, Ping Hui Liu, Tao Zhang
Research data shows that [1-3], polypropylene fiber not only has strong corrosion resistance and good crack resistance, but also is convenient to construct.
splitting tensile strength /MPa axial tensile strength /MPa ultimate tensile value /×10-6 relative dynamic modulus /% mass loss rate/% 1 31.5 2.26 2.61 129 2.28 >8 91.1 0.58 >200 37.8 3.15 3.89 136 No cracking 2 31.4 2.73 2.67 131 2.26 >8 90.8 0.44 >200 38.1 3.19 4.16 155 No cracking cracking 3 30.7 2.57 2.62 134 2.20 >8 91.4 0.36 >200 37.3 3.14 4.07 154 No cracking cracking 4 29.3 2.53 2.84 131 2.12 >8 91.3 0.38 >200 37.6 3.16 4.14 134 No cracking cracking 5 34.5 2.47 2.85 131 2.48 >8 92.3 0.40 >200 49.2 3.58 4.41 146 No cracking 6 34.0 2.77 2.92 134 2.47 >8 91.5 0.36 >200 56.1 3.68 4.62 145 No cracking 7 33.3 2.61 2.88 139 2.40 >8 92.5 0.37 >200 52.4 3.61 4.60 152 No cracking 8 32.1 2.55 3.00 133 2.37 >8 93.0 0.34 >200 50.7 3.65 4.61 136 No cracking 9 42.1 2.93 — — — — — — — 57.0 3.66 — — — Table 3 results table of concrete shrinkage test specimen number water-cement ratio 7d 14d 28d 90d 180d Shrinkage /×10-6 amount of reduction
/% Shrinkage /×10-6 mount of reduction /% Shrinkage /×10-6 mount of reduction /% Shrinkage /×10-6 mount of reduction /% Shrinkage /×10-6 mount of reduction/% 1 0.50 -314 - -418 - -562 - -724 - -795 - 2 -163 48.1 -234 44.0 -358 36.3 -547 24.4 -601 24.4 3 -260 17.2 -352 15.8 -475 15.5 -623 14.0 -673 15.3 4 -217 30.9 -276 34.0 -474 15.7 -735 -1.5 -802 0.9 5 0.45 -324 - -434 - -595 - -763 - -849 - 6 -186 42.6 -315 27.4 -491 17.5 -642 15.9 -690 18.7 7 -278 14.2 -370 14.7 -512 13.9 -643 15.7 -748 11.9 8 -252 22.2 -328 24.4 -541 9.1 -757 0.8 -820 3.4 Note: amount of reduction is the shrinkage relative to the standard concrete.
splitting tensile strength /MPa axial tensile strength /MPa ultimate tensile value /×10-6 relative dynamic modulus /% mass loss rate/% 1 31.5 2.26 2.61 129 2.28 >8 91.1 0.58 >200 37.8 3.15 3.89 136 No cracking 2 31.4 2.73 2.67 131 2.26 >8 90.8 0.44 >200 38.1 3.19 4.16 155 No cracking cracking 3 30.7 2.57 2.62 134 2.20 >8 91.4 0.36 >200 37.3 3.14 4.07 154 No cracking cracking 4 29.3 2.53 2.84 131 2.12 >8 91.3 0.38 >200 37.6 3.16 4.14 134 No cracking cracking 5 34.5 2.47 2.85 131 2.48 >8 92.3 0.40 >200 49.2 3.58 4.41 146 No cracking 6 34.0 2.77 2.92 134 2.47 >8 91.5 0.36 >200 56.1 3.68 4.62 145 No cracking 7 33.3 2.61 2.88 139 2.40 >8 92.5 0.37 >200 52.4 3.61 4.60 152 No cracking 8 32.1 2.55 3.00 133 2.37 >8 93.0 0.34 >200 50.7 3.65 4.61 136 No cracking 9 42.1 2.93 — — — — — — — 57.0 3.66 — — — Table 3 results table of concrete shrinkage test specimen number water-cement ratio 7d 14d 28d 90d 180d Shrinkage /×10-6 amount of reduction
/% Shrinkage /×10-6 mount of reduction /% Shrinkage /×10-6 mount of reduction /% Shrinkage /×10-6 mount of reduction /% Shrinkage /×10-6 mount of reduction/% 1 0.50 -314 - -418 - -562 - -724 - -795 - 2 -163 48.1 -234 44.0 -358 36.3 -547 24.4 -601 24.4 3 -260 17.2 -352 15.8 -475 15.5 -623 14.0 -673 15.3 4 -217 30.9 -276 34.0 -474 15.7 -735 -1.5 -802 0.9 5 0.45 -324 - -434 - -595 - -763 - -849 - 6 -186 42.6 -315 27.4 -491 17.5 -642 15.9 -690 18.7 7 -278 14.2 -370 14.7 -512 13.9 -643 15.7 -748 11.9 8 -252 22.2 -328 24.4 -541 9.1 -757 0.8 -820 3.4 Note: amount of reduction is the shrinkage relative to the standard concrete.
Online since: December 2012
Authors: Grazia Lombardo
From an environmental point of view, the remarkable reduction of the thickness of structural elements made of prestressed masonry, as in the case of the sail that has a thickness of 20 cm and a height of 3.5 meters, has as a direct result a considerable saving of building material.
From the results obtained by research and shown in Fig. 2, we can note that for a small two-story building in a seismic zone, if constructed with the procedure of prestressed masonry with blocks of natural stone, we get a reduction of mass, measured in terms of volume of used material, equal to 44% compared to reinforced masonry and 67% compared with ordinary masonry; this produces a significant reduction in the structural weight of the entire building [8].
In terms of environmental impact it has been seen that the reduction of embodied energy is equal to 41% compared to reinforced masonry and 61% compared to ordinary masonry.
The prestressing load which was calculated takes into account the characteristics of the building and of the site where the work will be done, the geometric data and the weight of the panel, the stresses due to wind and earthquakes, and the strength of the basalt, which is higher than 100 MPa.
The case study, analyzed in this paper, has highlighted that the new building envelope (vertical and horizontal) implies a reduction of Primary energy requirement equal to about 40% and a significant improvement in inside comfort, compared to the original enclosure.
From the results obtained by research and shown in Fig. 2, we can note that for a small two-story building in a seismic zone, if constructed with the procedure of prestressed masonry with blocks of natural stone, we get a reduction of mass, measured in terms of volume of used material, equal to 44% compared to reinforced masonry and 67% compared with ordinary masonry; this produces a significant reduction in the structural weight of the entire building [8].
In terms of environmental impact it has been seen that the reduction of embodied energy is equal to 41% compared to reinforced masonry and 61% compared to ordinary masonry.
The prestressing load which was calculated takes into account the characteristics of the building and of the site where the work will be done, the geometric data and the weight of the panel, the stresses due to wind and earthquakes, and the strength of the basalt, which is higher than 100 MPa.
The case study, analyzed in this paper, has highlighted that the new building envelope (vertical and horizontal) implies a reduction of Primary energy requirement equal to about 40% and a significant improvement in inside comfort, compared to the original enclosure.
Online since: March 2015
Authors: Sergey N. Lezhnev, A.O. Tolkushkin, A.B. Naizabekov, А.S. Erzhanov, V.A. Talmazan, Evgeniy Panin
Performed calculations by optimization of reductions modes on the mill 1700 of JSC "ArcelorMittal Temirtau" with shapes of 0.5×1000 mm and 0.7×1000 mm made of steel AISI 1008.
As a result of calculation on the computer optimized the variants of reductions modes and tensions, providing rolling of these shapes and satisfy specified constraints.
Data comparison of workshop and optimized rolling modes are shown in Table 4.
Redistribution of reductions in stands leads to some increase of rolling power in the third cage (Fig. 7).
The results of the optimization calculations showed that with the increasing the front tension and relative reduction is seen a slight reduction of the rolling force and power rolling, except for the cage number 3.
As a result of calculation on the computer optimized the variants of reductions modes and tensions, providing rolling of these shapes and satisfy specified constraints.
Data comparison of workshop and optimized rolling modes are shown in Table 4.
Redistribution of reductions in stands leads to some increase of rolling power in the third cage (Fig. 7).
The results of the optimization calculations showed that with the increasing the front tension and relative reduction is seen a slight reduction of the rolling force and power rolling, except for the cage number 3.