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Online since: August 2014
Authors: Julita Krol, Grzegorz Juszkiewicz, Michal Kozupa, Robert Platek, Grzegorz Kmita
However, a full analysis of any structural system, in which the acoustic response is the output, must obligatory start with accurate operational modal analysis and a really good correlation with the system eigenvalues derived from the real test data.
Advanced measurement techniques, such as Laser Doppler Vibrometry (LDV) can be helpful in determining the accurate operational modal analysis providing a really good correlation with the system eigenvalues derived from the real test data.
The system is extensively used for localization and identification of the noise sources in many applications, with most focusing on sound analysis and noise reduction.
When classical methods are used to measure an exemplary power product, data from numerous measurement points must be acquired using microphones or vibration transducers.
Moreover, documenting the success of the noise reduction is much easier with the acoustic camera system.
Advanced measurement techniques, such as Laser Doppler Vibrometry (LDV) can be helpful in determining the accurate operational modal analysis providing a really good correlation with the system eigenvalues derived from the real test data.
The system is extensively used for localization and identification of the noise sources in many applications, with most focusing on sound analysis and noise reduction.
When classical methods are used to measure an exemplary power product, data from numerous measurement points must be acquired using microphones or vibration transducers.
Moreover, documenting the success of the noise reduction is much easier with the acoustic camera system.
Online since: July 2011
Authors: Shinji Fukao, Yoshiaki Ito, Yoshikazu Nakanishi, Yuuki Sato, Hiroyuki Honda, Shinzo Yoshikado, Yang Guan, Kazuyuki Ito
Table 2 shows the average count rate, the RMS value of the average value, and the fluctuation factor calculated from the data in Fig. 5.
Average count rate, the RMS value of the fluctuation, and fluctuation factor calculated from the data in Fig. 5.
One factor that contributes to this effect is the reduction in the number of electrons supplied.
It is conjectured that the reduction in the average count rate is due to the properties of the case material.
Data.
Average count rate, the RMS value of the fluctuation, and fluctuation factor calculated from the data in Fig. 5.
One factor that contributes to this effect is the reduction in the number of electrons supplied.
It is conjectured that the reduction in the average count rate is due to the properties of the case material.
Data.
Online since: January 2010
Authors: R. Lindau, A. Moslang, Edeltraud Materna-Morris
Material Development
A first step was the reduction of the chromium content in the alloys, from 11 up to 9 wt.%, with the
effect that tensile strength Rm decreased from about 700 MPa up to 500 MPa at 300 °C.
The effect of undesired impurities was calculated by decay data of the alloying elements, Fig. 2.
At higher irradiation and test temperatures up to 450 °C, the data reached the level of un-irradiated materials, but still with a reduction in elongation, due to the limitation of the thermal stability of interstitial type defects [13].
Möslang, et.al.: "Towards reduced activation structural materials data for fusion DEMO reactors", Nucl.
The effect of undesired impurities was calculated by decay data of the alloying elements, Fig. 2.
At higher irradiation and test temperatures up to 450 °C, the data reached the level of un-irradiated materials, but still with a reduction in elongation, due to the limitation of the thermal stability of interstitial type defects [13].
Möslang, et.al.: "Towards reduced activation structural materials data for fusion DEMO reactors", Nucl.
Online since: August 2016
Authors: Lek Sikong, Phatcharee Phoempoon
These properties make it candidates for many applications in field-effect such as energy-efficient window coatings [3], thermal sensors [4], cathode materials for reversible lithium-ion batteries[5], electrical and infrared light switching device [6, 7], optical data storage medium [8].
Table1 show DSC data for the heating and cooling cycles along with hysteresis width (DT) for VO2 powder.
OleÏnik, Optical Data Recording with Vanadium Dioxide–Based Film Reversible Media, Technical Physics 47 (2002) 1014-1018
Seshadri, Controlled Reduction of Vanadium Oxide Nanoscrolls: Crystal Structure, Morphology, and Electrical Properties, Chemistry of Materials 20 (2008) 6396-6404
Li, Preparation of W- and Mo-doped VO2(M) by ethanol reduction of peroxovanadium complexes and their phase transition and optical switching properties, Journal of Alloys and Compounds 544 (2012) 30-36.
Table1 show DSC data for the heating and cooling cycles along with hysteresis width (DT) for VO2 powder.
OleÏnik, Optical Data Recording with Vanadium Dioxide–Based Film Reversible Media, Technical Physics 47 (2002) 1014-1018
Seshadri, Controlled Reduction of Vanadium Oxide Nanoscrolls: Crystal Structure, Morphology, and Electrical Properties, Chemistry of Materials 20 (2008) 6396-6404
Li, Preparation of W- and Mo-doped VO2(M) by ethanol reduction of peroxovanadium complexes and their phase transition and optical switching properties, Journal of Alloys and Compounds 544 (2012) 30-36.
Online since: June 2014
Authors: Ting Zhou, Ning Wang, Hui Guo, Yong Xu, Xue Feng Wang, Li Juan You
In recent years, disposal technologies for hyperaccumulators have been extensively studied with aim at reduction, recycle and harmless treatment.
At present, the experimental remediation base in Chenzhou in Hunan Province and Huanjiang county in Guangxi have been completed the first phase of the project[3-5], a lot of Pteris vittata L. need to be processed, but according to the data from the current point of view, there also have no appropriate method, so, how to develop harmless disposal and resource-reuse-oriented methods for disposal of the Pteris vittata L. has become a problem that the whole process of soil remediation research can not be avoided, and also a common problem faced in the field of phytoremediation in recent years.
Currently, under laboratory conditions, incineration is a good effective reduction method, but it’s actual value must depend on the combustion device, and the research progress about the bottom ash and exhaust gas.
Cao et.al.[11] studied that composting reduced the Pteris vittata L. biomass by 38%, comparable to 35% reduction of the low-As Pteris vittata L. biomass containing similar to 12 mg As kg-1, indicating that the high As concentration in Pteris vittata L. had little detrimental effect on microorganisms involved in composting.
Features of hyperaccumulator is containing high concentrations of metals or metalloid and high biomass, so we can consider it as a fuel for combustion, during combustion, it may be converted into pyrolysis gas or vegetable oil, that also can be used, then recycle the heavy metal/metalloid, realize the reduction, harmless and recycle treatment.
At present, the experimental remediation base in Chenzhou in Hunan Province and Huanjiang county in Guangxi have been completed the first phase of the project[3-5], a lot of Pteris vittata L. need to be processed, but according to the data from the current point of view, there also have no appropriate method, so, how to develop harmless disposal and resource-reuse-oriented methods for disposal of the Pteris vittata L. has become a problem that the whole process of soil remediation research can not be avoided, and also a common problem faced in the field of phytoremediation in recent years.
Currently, under laboratory conditions, incineration is a good effective reduction method, but it’s actual value must depend on the combustion device, and the research progress about the bottom ash and exhaust gas.
Cao et.al.[11] studied that composting reduced the Pteris vittata L. biomass by 38%, comparable to 35% reduction of the low-As Pteris vittata L. biomass containing similar to 12 mg As kg-1, indicating that the high As concentration in Pteris vittata L. had little detrimental effect on microorganisms involved in composting.
Features of hyperaccumulator is containing high concentrations of metals or metalloid and high biomass, so we can consider it as a fuel for combustion, during combustion, it may be converted into pyrolysis gas or vegetable oil, that also can be used, then recycle the heavy metal/metalloid, realize the reduction, harmless and recycle treatment.
Online since: January 2026
Authors: Yao Dong Gu, Qin Er Qiu, Tian Le Jie, Da Tao Xu, Hui Yu Zhou, Xiu Ye Qu, Julien S. Baker
First, CT scan data of the foot were collected from normal, mild HV, and moderate HV subjects.
(C) High-speed fluorescence imaging image acquisition, and Bone displacement data acquisition.
(E) Acquisition of bone displacement data.
Prior to statistical analysis, data were assessed for normality using the Shapiro-Wilks test.
Informed consent was obtained from all participants prior to data collection, involved in the study.
(C) High-speed fluorescence imaging image acquisition, and Bone displacement data acquisition.
(E) Acquisition of bone displacement data.
Prior to statistical analysis, data were assessed for normality using the Shapiro-Wilks test.
Informed consent was obtained from all participants prior to data collection, involved in the study.
Online since: June 2006
Authors: Vytautas Bučinskas, Vytautas Slivinskas, Kastytis Slivinskas
The transient process measured after the hammer blow is used as input data.
Using the FFT and IFFT procedures the sample data is decomposed into two parts: a high frequency component and a low frequency component.
The results show good agreement with experimental data.
The measured impulse response of the investigated mechanical system could be input data for the modeling.
As a result we got six real damped sinusoids (twelve complex exponents) that model the data with RMSE equal to 0.045 micrometers.
Using the FFT and IFFT procedures the sample data is decomposed into two parts: a high frequency component and a low frequency component.
The results show good agreement with experimental data.
The measured impulse response of the investigated mechanical system could be input data for the modeling.
As a result we got six real damped sinusoids (twelve complex exponents) that model the data with RMSE equal to 0.045 micrometers.
Online since: November 2011
Authors: Ke Zhang, Yu Hou Wu, Shi Chao Chen, Feng Lu
In order to meet the requirements of high speed, high accuracy, high reliability and small vibration in the rapid processing of machine tool, it is necessary to make a rigorous precision testing for the precision-processed spindle and obtain reliable data to meet the design standards and performance requirements of all ceramic high-speed spindle.
The basic principles of the work is through the detection sensor (probe) and the measurement space with the axis of movement, side head system to detect three-dimensional coordinates of points to pass measurement software, and then calculated by the analysis software to complete the measured point (point group) of Analysis of fitting the measured reduction of the final geometric elements, and on this basis to calculate the theoretical value (nominal value) between the deviation in order to complete the work on the part is measured.
First, after the ceramic spindle cleaned the table into the coordinate measuring machine, and the establishment of part coordinate system, then measured to determine the coordinates of the center of the hole position in the automatic measurement system LSP side head data collection and measurement software spread Roundness on the size of the assessment, measured in the collected data, input into the computer for analysis calculation, and output the measurement results.
Through the analysis of testing the roundness error measuring data.
Fig. 3 A particular section of the cylindricity testing results analysis Table 3 The external circular measurements of different sectional cylindricity error section 1 2 3 4 5 cylindricity error 1.8 2.0 1.8 1.4 1.8 Through three coordinates of the cylindricity error analysis of the measuring data, the error can completely satisfy zirconia ceramics spindle design requirements.
The basic principles of the work is through the detection sensor (probe) and the measurement space with the axis of movement, side head system to detect three-dimensional coordinates of points to pass measurement software, and then calculated by the analysis software to complete the measured point (point group) of Analysis of fitting the measured reduction of the final geometric elements, and on this basis to calculate the theoretical value (nominal value) between the deviation in order to complete the work on the part is measured.
First, after the ceramic spindle cleaned the table into the coordinate measuring machine, and the establishment of part coordinate system, then measured to determine the coordinates of the center of the hole position in the automatic measurement system LSP side head data collection and measurement software spread Roundness on the size of the assessment, measured in the collected data, input into the computer for analysis calculation, and output the measurement results.
Through the analysis of testing the roundness error measuring data.
Fig. 3 A particular section of the cylindricity testing results analysis Table 3 The external circular measurements of different sectional cylindricity error section 1 2 3 4 5 cylindricity error 1.8 2.0 1.8 1.4 1.8 Through three coordinates of the cylindricity error analysis of the measuring data, the error can completely satisfy zirconia ceramics spindle design requirements.
Online since: December 2012
Authors: Jian Hua Zhang, Tao Wang, Shi Mei Hao
It is proved that mechanical part made of MRMC has advantages of static and dynamic performance, to meet the requirement of vibration reduction.
Fig. 7 1st order modal Fig. 8 2nd order modal Fig. 9 3rd order modal Fig. 10 4th order modal Fig.11 5th order modal Table 2 Natural frequency analysis results Frequency cast iron RMC MRMC 1st Order Frequency 403.42 421.91 414.75 2nd Order Frequency 471.30 673.52 575.20 3rd Order Frequency 861.49 1020.3 1017.8 4th Order Frequency 1122.4 1826.6 1697.5 5th Order Frequency 1144.9 1965.9 1703.3 By analyzing the data in the table, it can be got that although the natural frequency of MRC part can decrease after adding mental embedded, it did not decrease much and even deeply increased a lot comparing with the full cast iron part, which will largely improve the safety property and machining precision of machine tools.
Fig. 7 1st order modal Fig. 8 2nd order modal Fig. 9 3rd order modal Fig. 10 4th order modal Fig.11 5th order modal Table 2 Natural frequency analysis results Frequency cast iron RMC MRMC 1st Order Frequency 403.42 421.91 414.75 2nd Order Frequency 471.30 673.52 575.20 3rd Order Frequency 861.49 1020.3 1017.8 4th Order Frequency 1122.4 1826.6 1697.5 5th Order Frequency 1144.9 1965.9 1703.3 By analyzing the data in the table, it can be got that although the natural frequency of MRC part can decrease after adding mental embedded, it did not decrease much and even deeply increased a lot comparing with the full cast iron part, which will largely improve the safety property and machining precision of machine tools.
Online since: February 2015
Authors: Milan Růžička, Milan Dvořák
The objective was to determine whether fibers may cause a reduction of mechanical properties of joints.
Table 1 Summary of the experimental results Bonded joint configuration Number of specimens, shear strength/fatigue life τMAX [MPa] N [1] A 13/19 17.6 ± 2.2 386014 ± 235279 B 5/5 17.1 ± 1.7 521738 ± 280770 C 4/6 21.2 ± 1.2 817163 ± 265337 D 5/5 18.7 ± 1.7 584327 ± 232513 E 5/7 17.9 ± 2.3 377680 ± 107822 F 5/5 19.9 ± 1.6 572858 ± 280608 Statistical analysis of experimental data was performed to verify the following hypotheses: • optical fiber in an adhesive layer has no influence on a shear strength of the joint, • optical fiber in an adhesive layer has no influence on a fatigue life of the joint.
Table 1 Summary of the experimental results Bonded joint configuration Number of specimens, shear strength/fatigue life τMAX [MPa] N [1] A 13/19 17.6 ± 2.2 386014 ± 235279 B 5/5 17.1 ± 1.7 521738 ± 280770 C 4/6 21.2 ± 1.2 817163 ± 265337 D 5/5 18.7 ± 1.7 584327 ± 232513 E 5/7 17.9 ± 2.3 377680 ± 107822 F 5/5 19.9 ± 1.6 572858 ± 280608 Statistical analysis of experimental data was performed to verify the following hypotheses: • optical fiber in an adhesive layer has no influence on a shear strength of the joint, • optical fiber in an adhesive layer has no influence on a fatigue life of the joint.