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Online since: October 2015
Authors: Uwe Heisel, Vasil Slavov, Martin Kimmelmann
An FE model of a spindle unit is created and validated with experimental data by solving an optimisation problem.
It has not only to be capable of driving the tool but also of transferring energy, media and data at the same time.
Figure 4: Measured and calculated frequency response functions Concepts for the transmission of media, data and energy This section deals with possible solutions for transmitting energy, media and data through the hollow shaft taper and the spindle shaft.
Concept 2 shows the greatest reduction in axial stiffness.
An FE model of a spindle unit was created and validated by using experimental data.
It has not only to be capable of driving the tool but also of transferring energy, media and data at the same time.
Figure 4: Measured and calculated frequency response functions Concepts for the transmission of media, data and energy This section deals with possible solutions for transmitting energy, media and data through the hollow shaft taper and the spindle shaft.
Concept 2 shows the greatest reduction in axial stiffness.
An FE model of a spindle unit was created and validated by using experimental data.
Online since: June 2015
Authors: Rusmidah Ali, Wan Azelee Wan Abu Bakar, Susilawati Toemen
The structure of the catalyst was characterized by X-ray diffraction (XRD) using Cu Kα radiation (λ=1.54060 Å) and the data was collected from 2θ of 20o to 80o.
The data of BET surface area, pore size and pore volume are shown in Table 1.
Generally, the addition an appropriate amount of strontia leads to the different reduction temperature.
The lower reduction temperature shoulder peak over this catalyst was located at 220oC related to the reduction of manganese oxide species.
The reduction temperature of 300oC was evaluated from TPR analysis in Figure 3 above.
The data of BET surface area, pore size and pore volume are shown in Table 1.
Generally, the addition an appropriate amount of strontia leads to the different reduction temperature.
The lower reduction temperature shoulder peak over this catalyst was located at 220oC related to the reduction of manganese oxide species.
The reduction temperature of 300oC was evaluated from TPR analysis in Figure 3 above.
Online since: October 2015
Authors: Adriana Tudor, Silviu Nicolae Platon
The purpose was to identify a solution regarding the reduction of noise emitted by the compressor in order to provide protection for the nearby residential area and the placement of a similar device in a new residential area in suitable environmental conditions.
The data collected were processed using “Frequency analysis software BZ 5503”.
The absorbing structures used (full modular panels and the panel with door and window) are designed as experimental model designed in the Noise and Vibration Laboratory of INCDPM Bucharest, model tested at INCERC Bucharest is offering a sound reduction up to 20 dB(A).
Fig.4 Noise map of the compressor Conclusions The purpose of the research was to identify a solution regarding the reduction of noise emitted by the gas compressor in order to provide sound protection for the nearby residential area and also, the placement of a similar equipment in a new residential area in suitable environmental conditions.
Technical project of the absorbing enclosure includes full modular panels and a panel with door and window, offering a sound reduction up to 20 dB(A).
The data collected were processed using “Frequency analysis software BZ 5503”.
The absorbing structures used (full modular panels and the panel with door and window) are designed as experimental model designed in the Noise and Vibration Laboratory of INCDPM Bucharest, model tested at INCERC Bucharest is offering a sound reduction up to 20 dB(A).
Fig.4 Noise map of the compressor Conclusions The purpose of the research was to identify a solution regarding the reduction of noise emitted by the gas compressor in order to provide sound protection for the nearby residential area and also, the placement of a similar equipment in a new residential area in suitable environmental conditions.
Technical project of the absorbing enclosure includes full modular panels and a panel with door and window, offering a sound reduction up to 20 dB(A).
Online since: February 2009
Authors: Hiroo Shizuka, Katsuhiko Sakai, Yasuo Suzuki
As a
result, tool breakage was prevented when using carbide tools and a large reduction in tool wear was
confirmed when using cermet tools.
The data shows that the cutting temperatures in each of the mist cutting conditions are lower than those for dry cutting, with both the cemented carbide and cermet tools, while the oil-N2 mist cutting does not show a further reduction in temperature, as in the case of the mist cutting.
However, the tool wear reduction effect of N2-assisted cutting was evident in the measurements of tool wear.
Therefore, it seems that the main effect of oil-N2 mist cutting is not a reduction in oxidation temperature but a reduction in the tool's oxidation wear.
(3) The effects of N2-assisted cutting come mainly from the reduction of oxidation abrasion on the tool, rather than through a reduction of temperature by limiting thermally driven oxidation
The data shows that the cutting temperatures in each of the mist cutting conditions are lower than those for dry cutting, with both the cemented carbide and cermet tools, while the oil-N2 mist cutting does not show a further reduction in temperature, as in the case of the mist cutting.
However, the tool wear reduction effect of N2-assisted cutting was evident in the measurements of tool wear.
Therefore, it seems that the main effect of oil-N2 mist cutting is not a reduction in oxidation temperature but a reduction in the tool's oxidation wear.
(3) The effects of N2-assisted cutting come mainly from the reduction of oxidation abrasion on the tool, rather than through a reduction of temperature by limiting thermally driven oxidation
Online since: January 2015
Authors: Dan Pan
Section 3 provides the data used in this study.
Methodology and Data Fertilizer use intensity is the ratio of fertilizer input to agricultural output in the production process.
Data of agricultural output and sown area by different crops were collected from China Statistical Yearbook issued by the State Statistics Bureau.
Data of fertilizer use amount was gathered from The Compiled Materials of Costs and Profits of Agricultural Products of China issued by the National Development and Reform Commission.
To make data suitable for the complete decomposition analysis by crops, we divide the agricultural economy of China into three sectors: the grain crops sector, the economic crops sector, and the horticultural crops sector.
Methodology and Data Fertilizer use intensity is the ratio of fertilizer input to agricultural output in the production process.
Data of agricultural output and sown area by different crops were collected from China Statistical Yearbook issued by the State Statistics Bureau.
Data of fertilizer use amount was gathered from The Compiled Materials of Costs and Profits of Agricultural Products of China issued by the National Development and Reform Commission.
To make data suitable for the complete decomposition analysis by crops, we divide the agricultural economy of China into three sectors: the grain crops sector, the economic crops sector, and the horticultural crops sector.
Online since: June 2013
Authors: Paulo Pedro Kenedi, Fabio Santos, Fabio Pires, Richard Clements, Judimar Clevelario, Terry Sheldrake, Luís Felipe Guimarães de Souza
The experimental apparatus consisted of an Instron servohydraulic materials test machine, a data acquisition system, Kyowa MCG-6, and a microcomputer with LabView software.
The guidelines established in ASTM Standard E739 [7], have been followed to generate the linear logarithmic SN curve, as expressed in Eq.1 from the test data
The evaluation of the experimental test data was taken with a confidence level of 95.4%.
Service life as a function of the selected SN curve Conclusions The proposed test methodology was used to detect the influence of CO2 partial pressure on the fatigue resistance of tensile armor wires and was seen as a useful tool to generate design data for pipes designed to operate with fluids presenting high concentrations of CO2.The reduction in service life, calculated as a result of CO2 partial pressure, should not be disregarded for design purposes and the incorporation of experimental data in design tools enhances the reliability of the riser systems.
[7] ASTM Standard E739, in: Standard Practice for Statistical Analysis of Linear or Linearized Stress-Life (S-N) and Strain – Life (ε-N) Fatigue Data (2004)
The guidelines established in ASTM Standard E739 [7], have been followed to generate the linear logarithmic SN curve, as expressed in Eq.1 from the test data
The evaluation of the experimental test data was taken with a confidence level of 95.4%.
Service life as a function of the selected SN curve Conclusions The proposed test methodology was used to detect the influence of CO2 partial pressure on the fatigue resistance of tensile armor wires and was seen as a useful tool to generate design data for pipes designed to operate with fluids presenting high concentrations of CO2.The reduction in service life, calculated as a result of CO2 partial pressure, should not be disregarded for design purposes and the incorporation of experimental data in design tools enhances the reliability of the riser systems.
[7] ASTM Standard E739, in: Standard Practice for Statistical Analysis of Linear or Linearized Stress-Life (S-N) and Strain – Life (ε-N) Fatigue Data (2004)
Online since: December 2012
Authors: Dong Lin Ma, Xi Jun Zhang, Qian Mi
Introduction
With the rapid development of computer and communication technologies, vast volume of video data are generated increasingly and spread fast, so how to manage such a huge amount of video contents has become an urgent problem[1].
Video summarization is an indispensable tool of any practical video content management system in large volume video data[2].
RS is a novel and powerful tool introduced by Pawlak et al for data analysis.
CONCLUSIONS Conventional video summarization extraction technologies have deficiency of low efficiency and redundant data.
Then RS theory is introduced to data reduction.
Video summarization is an indispensable tool of any practical video content management system in large volume video data[2].
RS is a novel and powerful tool introduced by Pawlak et al for data analysis.
CONCLUSIONS Conventional video summarization extraction technologies have deficiency of low efficiency and redundant data.
Then RS theory is introduced to data reduction.
Online since: May 2012
Authors: Run Xia He, Quan Sheng Liu, Fang Wu, Chen Liang Zhou, Ke Duan Zhi, Hai Bo Yao
The crystalline phases were identified by reference to powder diffraction data (PDF).
Each curve in Fig.3(a) can be distinguished into four reduction peaks, i.e., two low-temperature peaks and two high-temperature peaks, denoted as α, β, γ and λ.
The peaks of α and β can be attribute to the reduction of surface and moderate dispersed CuO and Mn4O3, while the peaks of γ and λ can be ascribed to the reduction of the large isolated and inner copper-manganese-lanthanum oxide phase.
The reduction curves in Fig.3(b) exhibits two peaks, a low and a high-temperature peak.
The reduction peak positions of H2 and CO-TPR as shown in Fig.3 decreased with the increase of La-doping rate, it can be concluded that the doped La has greatly enhanced the synergistic effect of catalysts.
Each curve in Fig.3(a) can be distinguished into four reduction peaks, i.e., two low-temperature peaks and two high-temperature peaks, denoted as α, β, γ and λ.
The peaks of α and β can be attribute to the reduction of surface and moderate dispersed CuO and Mn4O3, while the peaks of γ and λ can be ascribed to the reduction of the large isolated and inner copper-manganese-lanthanum oxide phase.
The reduction curves in Fig.3(b) exhibits two peaks, a low and a high-temperature peak.
The reduction peak positions of H2 and CO-TPR as shown in Fig.3 decreased with the increase of La-doping rate, it can be concluded that the doped La has greatly enhanced the synergistic effect of catalysts.
Online since: July 2013
Authors: Zbigniew Zembaty, Seweryn Kokot, Piotr Bobra
The harmonic motion of the actuator was controlled by Instron system, while data acquisition was done by multi-channel system „MCG Plus” of Hottinger.
The material data of plexiglass are as follows: density r = 1318.7kg/m3 and Young modulus E = 4.51 GPa.
Beam with two stiffness reductions.
α1 α2 α3 Real stiffness reduction 0.85 0.70 0.55 Detected stiffness reduction 0.86 0.67 0.54 Fig. 5.
For the three segment stiffness loss, beam reconstructions gave the best results using only rotational vibration data (Table 1).
The material data of plexiglass are as follows: density r = 1318.7kg/m3 and Young modulus E = 4.51 GPa.
Beam with two stiffness reductions.
α1 α2 α3 Real stiffness reduction 0.85 0.70 0.55 Detected stiffness reduction 0.86 0.67 0.54 Fig. 5.
For the three segment stiffness loss, beam reconstructions gave the best results using only rotational vibration data (Table 1).
Online since: September 2014
Authors: Wipawee Tharmmaphornphilas, Keeratipan Damrongseree
Introduction
A hard disk drive industry has been more competitive for supporting the needs of data storage that increasing exponentially.
Therefore, this paper focuses on defective reduction in an in-house recycle process of a hard disk drive media.
The company data in Fig. 1 on November 2012 shows that an in-house recycle process built defective rate related to media about 23%.
Based on data from 30 days and 1,000 samples each day, P chart in Fig. 11 shows the average of defective rate of sunray defect is 3.203% and all is in the specification.
Senjuntichai: Spiral Defect Reduction of Hard Disk Disk Media, Applied Mechanics and Materials, Vol. 421 (2013), p. 93-98.
Therefore, this paper focuses on defective reduction in an in-house recycle process of a hard disk drive media.
The company data in Fig. 1 on November 2012 shows that an in-house recycle process built defective rate related to media about 23%.
Based on data from 30 days and 1,000 samples each day, P chart in Fig. 11 shows the average of defective rate of sunray defect is 3.203% and all is in the specification.
Senjuntichai: Spiral Defect Reduction of Hard Disk Disk Media, Applied Mechanics and Materials, Vol. 421 (2013), p. 93-98.