Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: March 2018
Authors: Laura Diana Grigorie, Alina Elena Romanescu, Daniela Vintilă
The reduction achieved with the mass matrix is necessary for a spectral analysis or for an overlapping consecutive vibrational mode analysis (spectral, harmonic analyses, random vibrations).
If we want to compare displacements for different modes, we could use the reduction achieved with the identity matrix.
If the reduction is achieved with the identity matrix, then we can compare the stress from different points, for a certain vibrational mode.
Input data for harmonic analysis: - Harmonic loads (forces, pressures, moments or displacements) with known frequency and amplitude; Output data for harmonic analysis: - Harmonic displacements for each degree of freedom, which are generally not in the same phase as the loads; - Deformations and stress.
If we want to compare displacements for different modes, we could use the reduction achieved with the identity matrix.
If the reduction is achieved with the identity matrix, then we can compare the stress from different points, for a certain vibrational mode.
Input data for harmonic analysis: - Harmonic loads (forces, pressures, moments or displacements) with known frequency and amplitude; Output data for harmonic analysis: - Harmonic displacements for each degree of freedom, which are generally not in the same phase as the loads; - Deformations and stress.
Online since: September 2013
Authors: Dae Ho Yoon, Kenji Toda, Mineo Sato, Tadashi Ishigaki, Takeshi Abe, Kazuyoshi Uhematsu, Kim Bong Sung, Deok Su Jo, Takaki Masaki
The ratio of non-reduced Eu3+ ions in the NaAlSiO4:Eu2+ phosphor synthesized using SiO powder was decreased by the reduction effect of SiO powder.
Although a high-temperature reaction synthesis enhances the reduction of a Eu2+-doped silicate phosphor [13], the technique is unsuitable for a sodium-containing compound such as NaAlSiO4:Eu2+ material.
Powder X-ray diffraction (XRD) data were obtained using an X-ray diffractometer (MX-Labo; Mac Science Ltd.).
Data were recorded in steps of 0.03 eV in the transmission mode.
The simulation pattern of NaAlSiO4 was calculated from structural data of the Inorganic Crystal Structure Database (ICSD) # 155001.
Although a high-temperature reaction synthesis enhances the reduction of a Eu2+-doped silicate phosphor [13], the technique is unsuitable for a sodium-containing compound such as NaAlSiO4:Eu2+ material.
Powder X-ray diffraction (XRD) data were obtained using an X-ray diffractometer (MX-Labo; Mac Science Ltd.).
Data were recorded in steps of 0.03 eV in the transmission mode.
The simulation pattern of NaAlSiO4 was calculated from structural data of the Inorganic Crystal Structure Database (ICSD) # 155001.
Online since: October 2016
Authors: Maciej Pietrzyk, Aleksey Korchunov, Dmitriy Konstantinov, Krzysztof Bzowski, Roman Kuziak
When varying the die semi-angle and reduction degree, drawing will result in steel rod with a hardened surface layer of the set thickness.
To study how reduction influences steel properties, a final diameter was varied from 37 mm to 35 mm.
To obtain required accuracy of data transfer between scale levels, 2 places with high concentration of elements (0.1x0.1 mm with 100 elements) were located in mesh of the rod cross section.
The difference between the test data and the simulation results was less than 6% for the surface layer and less than 2% for the central layer.
The drawing reduction degree has relatively less impact on the transformation and distribution of the martensite.
To study how reduction influences steel properties, a final diameter was varied from 37 mm to 35 mm.
To obtain required accuracy of data transfer between scale levels, 2 places with high concentration of elements (0.1x0.1 mm with 100 elements) were located in mesh of the rod cross section.
The difference between the test data and the simulation results was less than 6% for the surface layer and less than 2% for the central layer.
The drawing reduction degree has relatively less impact on the transformation and distribution of the martensite.
Online since: July 2012
Authors: Tomasz Barszcz, Radoslaw Zimroz, Walter Bartelmus, Jacek Urbanek
Data used in this paper are presented on Fig.6.
So there is a need to use other data analysis techniques.
The data associated to low power generated by a turbine and the data equivalent to upper limits of generated power are difficult to interpret.
Fig.11 Linear regression load susceptibility characteristics for restricted data; green data scatter for rolling element in good condition, red data scatter for rolling element in bad condition For further consideration only selected data are taking into statistical processing.
Zimroz Data dimension reduction and visualization of multidimensional data with application to gearbox diagnostics data: comparison of several methods Solid State Phenomena Vol. 180 (2012) 177-184 doi:10.4028/www.scientific.net/SSP.180.177
So there is a need to use other data analysis techniques.
The data associated to low power generated by a turbine and the data equivalent to upper limits of generated power are difficult to interpret.
Fig.11 Linear regression load susceptibility characteristics for restricted data; green data scatter for rolling element in good condition, red data scatter for rolling element in bad condition For further consideration only selected data are taking into statistical processing.
Zimroz Data dimension reduction and visualization of multidimensional data with application to gearbox diagnostics data: comparison of several methods Solid State Phenomena Vol. 180 (2012) 177-184 doi:10.4028/www.scientific.net/SSP.180.177
Online since: January 2015
Authors: Anastasiia Andreevna Staritcyna, Darya Nemova, Alexander S. Gorshkov, Nikolay Vatin, Pavel Ryimkevich, Aydos Urustimov
The complex of actions that leads to reduction of damages from buildings of thermal energy is listed, heating up to improvement of parameters of a microclimate in the operated rooms of the top floors of buildings.
average temperature of the coldest five-day week with security 0,92 according to Construction Norms and Regulations 23-01; – air temperature in rooms of a cold attic of the building, ºС; – the area, sq.m and the specified resistance to a heat transfer, sq.m • °C/W, protections between rooms heated in the building and rooms of a cold attic (garret overlapping, partitions between garrets and rooms of ladder marches, etc.); qpj – the linear density of a thermal stream through the thermal insulation surface, falling on 1 linear meter of length of the pipeline of a certain diameter taking into account heat losses through the isolated support, flange connections and fittings, W/m (for attics and cellars of qpj value depending on the nominal diameter of the pipeline and the average temperature of the heat carrier are provided in the tab. of 12 construction regulations 23–101); lpj – length of the pipeline of a certain diameter, m (for the operated buildings is accepted according to actual data
At preset values of temperatures external () and internal () air, the invariable geometrical sizes of the enclosing structures of a cold attic (,,) and the constant length of pipelines of systems of heating and hot water supply (), decrease in air temperature in rooms of a cold attic is provided with reduction of heatreceipts.
It is possible to achieve reduction of heatreceipts to rooms of a cold attic the following engineering actions: · warming of garret overlapping (increase sizes); · thermal insulation of pipelines of systems of heating and hot water supply (reduction of size ); · increase in air exchange in garrets (increase in value).
Besides a solution of the problem of formation ice built-up on buildings roofs with a cold attic, the listed complex of actions leads to reduction of losses by buildings of thermal energy by heating, to improvement of microclimate parameters in the operated rooms of the top floors of buildings.
average temperature of the coldest five-day week with security 0,92 according to Construction Norms and Regulations 23-01; – air temperature in rooms of a cold attic of the building, ºС; – the area, sq.m and the specified resistance to a heat transfer, sq.m • °C/W, protections between rooms heated in the building and rooms of a cold attic (garret overlapping, partitions between garrets and rooms of ladder marches, etc.); qpj – the linear density of a thermal stream through the thermal insulation surface, falling on 1 linear meter of length of the pipeline of a certain diameter taking into account heat losses through the isolated support, flange connections and fittings, W/m (for attics and cellars of qpj value depending on the nominal diameter of the pipeline and the average temperature of the heat carrier are provided in the tab. of 12 construction regulations 23–101); lpj – length of the pipeline of a certain diameter, m (for the operated buildings is accepted according to actual data
At preset values of temperatures external () and internal () air, the invariable geometrical sizes of the enclosing structures of a cold attic (,,) and the constant length of pipelines of systems of heating and hot water supply (), decrease in air temperature in rooms of a cold attic is provided with reduction of heatreceipts.
It is possible to achieve reduction of heatreceipts to rooms of a cold attic the following engineering actions: · warming of garret overlapping (increase sizes); · thermal insulation of pipelines of systems of heating and hot water supply (reduction of size ); · increase in air exchange in garrets (increase in value).
Besides a solution of the problem of formation ice built-up on buildings roofs with a cold attic, the listed complex of actions leads to reduction of losses by buildings of thermal energy by heating, to improvement of microclimate parameters in the operated rooms of the top floors of buildings.
Online since: August 2013
Authors: Xiang Feng, Yan Xu, Ming Hong Dai
Fig. 1 Control system hardware structure
(1)The data acquisition conversion module of engine speed sensor
The 09-32 tamping engine speed sensor use the voltage analog output which using the output of the analog voltage to show the speed of engine rotational, It is a voltage signal with A/D analog-to-digital conversion conditions.
(2)The PICl8F4550 microcontroller The PICl8F4550 microcontroller is not only with low power consumption[2], high output current, long data retention time, strong anti-jamming capability, reliable, etc., but the chip also have a strong ability to control and flexible way of working.
Data can be transmitted to an external device, to drive the optical coupling relay directly.
(3) The comparative circuit of throttle motor feedback resistor The microcontroller PICl8F4550 internal comparator have analog voltage comparator function, the corresponding voltage value can be set to achieve engine’s maximum, minimum speed and power reduction trigger speed control.
[2] Gang Hu, Based on PIC18F4550 environmental monitoring data acquisition system design, [J]Bulletin of Science and Technology (2012), p. 10.
(2)The PICl8F4550 microcontroller The PICl8F4550 microcontroller is not only with low power consumption[2], high output current, long data retention time, strong anti-jamming capability, reliable, etc., but the chip also have a strong ability to control and flexible way of working.
Data can be transmitted to an external device, to drive the optical coupling relay directly.
(3) The comparative circuit of throttle motor feedback resistor The microcontroller PICl8F4550 internal comparator have analog voltage comparator function, the corresponding voltage value can be set to achieve engine’s maximum, minimum speed and power reduction trigger speed control.
[2] Gang Hu, Based on PIC18F4550 environmental monitoring data acquisition system design, [J]Bulletin of Science and Technology (2012), p. 10.
Online since: November 2012
Authors: K. Magaswaran, A.S. Phuman Singh, Muhammad Zahir Hassan
The data will be focused during brake on condition.
The speed reduction during brake on condition is the speed response.
All these data is recorded simultaneously to identify the characteristic of the generated noise.
The data obtained will be analyzed on the occurance of groan in relation to speed and pressure.
Results The collected data from the experiment are the applied brake pressure in bar, the disc rotational speed, rpm and the sound level, db together with its frequency.
The speed reduction during brake on condition is the speed response.
All these data is recorded simultaneously to identify the characteristic of the generated noise.
The data obtained will be analyzed on the occurance of groan in relation to speed and pressure.
Results The collected data from the experiment are the applied brake pressure in bar, the disc rotational speed, rpm and the sound level, db together with its frequency.
Online since: August 2019
Authors: Sergiy Budzulyak, Volodymyr Kotsyubynsky, Bogdan Rachiy, Andrii Kachmar, Volodymyra Boychuk, Lyubov Yablon, Ivan Budzulyak
The capacitance of model capacitors based on carbons obtained at different modes was calculated from both from cycling voltammetry and galvanostatic charge-discharge data.
Zview2 analytic software was used for impedance spectroscopy data analysis [23].
The equivalent circuit used for experimental impedance data fitting is presented in Fig. 7.
The fitted data for circuit elements calculated for zero bias potential are generalized in Table 2.
Maximal value of specific capacity (up to about 100 F/g) for carbons obtained at 600ºC corresponds to MC-075-600-2 sample which is consistent with CV data.
Zview2 analytic software was used for impedance spectroscopy data analysis [23].
The equivalent circuit used for experimental impedance data fitting is presented in Fig. 7.
The fitted data for circuit elements calculated for zero bias potential are generalized in Table 2.
Maximal value of specific capacity (up to about 100 F/g) for carbons obtained at 600ºC corresponds to MC-075-600-2 sample which is consistent with CV data.
Online since: June 2013
Authors: Ai Ping Cai
In this paper, we propose a new detection algorithm based on FSVM, the main idea is to train classified sample and give all training data a degree of membership, increase punishment to the wrong sub-sample.
Its main idea is to give all data a membership value, increase the punishment to wrong points of samples in the training sample process, so as to get the best training sample.
The training process is to improve the performance of the classification model by providing different training data.
(a) Training images (b) Positive samples Figure 2 The image of the training data and the positive samples We need to test the selected parameter after the classification model was build.
Improved algorithm reduced the false detection rate of the image edge effectively, and has good performance of noise reduction.
Its main idea is to give all data a membership value, increase the punishment to wrong points of samples in the training sample process, so as to get the best training sample.
The training process is to improve the performance of the classification model by providing different training data.
(a) Training images (b) Positive samples Figure 2 The image of the training data and the positive samples We need to test the selected parameter after the classification model was build.
Improved algorithm reduced the false detection rate of the image edge effectively, and has good performance of noise reduction.
Online since: January 2007
Authors: Francis Hanejko, Arthur Rawlings, Patrick King, George Poszmik
Data will be presented that document P/M part
performance in comparison to conventional wrought steel grades.
Figure 1 illustrates the reduction in PFD with additions of graphite and powder lubricant; for premixes containing both graphite and lubricant the reduction in PFD is the summation of the individual effect of lubricant and graphite.
This data presents a comparison of rolling contact fatigue life of high core density FLN2-4405 (0.30% sintered carbon) along with FLN2-4405 (at 0.50% core carbon) and two wrought steel materials.
The data presented lists the material, type of carburizing employed, B50 life during rolling contact fatigue testing at two Hertzian stress levels, and a measure of the scatter defined as the ratio of B10 life to B90 (statistical determined as cycles to 10% failure and cycles to 90% failure).
Table 2 Rolling Contact Fatigue Data of High Density P/M Materials Material Processing Condition Hertz Contact Stress, MPa B50 Life, 106 cycles Scatter, Ratio B10 / B90 1900 16.7 1.8 AISI 5120 Vacuum Carburized.
Figure 1 illustrates the reduction in PFD with additions of graphite and powder lubricant; for premixes containing both graphite and lubricant the reduction in PFD is the summation of the individual effect of lubricant and graphite.
This data presents a comparison of rolling contact fatigue life of high core density FLN2-4405 (0.30% sintered carbon) along with FLN2-4405 (at 0.50% core carbon) and two wrought steel materials.
The data presented lists the material, type of carburizing employed, B50 life during rolling contact fatigue testing at two Hertzian stress levels, and a measure of the scatter defined as the ratio of B10 life to B90 (statistical determined as cycles to 10% failure and cycles to 90% failure).
Table 2 Rolling Contact Fatigue Data of High Density P/M Materials Material Processing Condition Hertz Contact Stress, MPa B50 Life, 106 cycles Scatter, Ratio B10 / B90 1900 16.7 1.8 AISI 5120 Vacuum Carburized.