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Online since: November 2011
Authors: Yu Hou Wu, Ke Zhang, Feng Lu, Shi Chao Chen
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: April 2016
Authors: Anatoly Kalyaev, Iakov S. Korovin, Maxim Khisamutdinov
The above noted features of modern NCICS significantly enhance the traffic load on the data channels, which can lead to delays in data transmission, reducing the efficiency of network-centric control.
This multiagent structure of the system control will help to give up the centralized control and data processing.
The bulletin board receives requests from the operators and publishes data about the received task; 4.
Depending on the request given for the task solution, the agent sends query to the operator’s terminal, decision makers, and data sources, task input data and proceeds to the solution. 7.
Oilfield equipment's state diagnostics on the basis of data mining technologies (2012).
This multiagent structure of the system control will help to give up the centralized control and data processing.
The bulletin board receives requests from the operators and publishes data about the received task; 4.
Depending on the request given for the task solution, the agent sends query to the operator’s terminal, decision makers, and data sources, task input data and proceeds to the solution. 7.
Oilfield equipment's state diagnostics on the basis of data mining technologies (2012).
Online since: May 2017
Authors: Masato Kato, Masashi Watanabe, Taku Matsumoto, Masahiko Machida, Hiroki Nakamura
Experimental data
Lattice parameter.
The data are shown in Fig. 5.
When compared with experimental data, the calculated data are in excellent agreement.
The calculated data were about 10 J/mol K lower than the experimental data at 1000 K.
The calculated data was shown on Fig.4 and is good agreement with the experimental data.
The data are shown in Fig. 5.
When compared with experimental data, the calculated data are in excellent agreement.
The calculated data were about 10 J/mol K lower than the experimental data at 1000 K.
The calculated data was shown on Fig.4 and is good agreement with the experimental data.
Online since: February 2014
Authors: Yong Sheng Gao, Sha Wu, Jiu He Ma, Jiu Liang Xiong
And then, using input and output test data, we presented commonly Voleterra series expression of EMP electromagnetic coupling model.
Fig.1 System identification step based on test data EMP radiation field coupling It is difficult to analyze simultaneously the effects on the components through various paths because of the long computation time and large amount of memory required.
For one thing, it is feasible to obtain input and output observation data of coupling process.
Larger NMSE values suggest the need for including higher order terms or that the data is noisy.
Summary A nonparametric quantitative model is introduced that captures the nonlinear dynamic properties of EMP coupling systems using input/output data.
Fig.1 System identification step based on test data EMP radiation field coupling It is difficult to analyze simultaneously the effects on the components through various paths because of the long computation time and large amount of memory required.
For one thing, it is feasible to obtain input and output observation data of coupling process.
Larger NMSE values suggest the need for including higher order terms or that the data is noisy.
Summary A nonparametric quantitative model is introduced that captures the nonlinear dynamic properties of EMP coupling systems using input/output data.
Online since: August 2013
Authors: Jian Xin Xu, Hua Wang, Xiu Li Sang, Yu Zhen Su, Han Jie Xiao
Chau et al.[4] is an attempt to seek a relatively optimal data-driven model for rainfall forecasting from three aspects: model inputs(seven input techniques), modeling methods (MANN, ANN, K-NN, LR), and data-preprocessing techniques(MA, PCA, SSA).
Four rain data records from different regions, namely two monthly and two daily series, are examined.
Therefore, the source of the data in this paper is reliable and the data information is true.
In the present study, the data is normalized to use the following normalization equation: where x is the original data value, xmax is the maximum value, xmin is the minimum value and xn is the normalized value of the data.
At the same time, it normalizes and reverses the normalized rainfall data by mapminmax function, and takes the rainfall data of nine years from 2001 to 2009 as learning samples.
Four rain data records from different regions, namely two monthly and two daily series, are examined.
Therefore, the source of the data in this paper is reliable and the data information is true.
In the present study, the data is normalized to use the following normalization equation: where x is the original data value, xmax is the maximum value, xmin is the minimum value and xn is the normalized value of the data.
At the same time, it normalizes and reverses the normalized rainfall data by mapminmax function, and takes the rainfall data of nine years from 2001 to 2009 as learning samples.
Online since: June 2014
Authors: Miklos Horvath, Tibor Poos
The data yielded were used to represent the temperature characteristic of drying and the mass changes of the product.
Changes in product moisture content can be calculated from its mass reduction.
Figure 6 shows mass reduction in function of product moisture content in case of the four measurements selected.
Changes in product moisture content can be calculated from its mass reduction.
Figure 6 shows mass reduction in function of product moisture content in case of the four measurements selected.
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.
Online since: April 2013
Authors: Moussa Karama, S. Mistou
The use of multi-layered composite materials in the confection of industrial pipe connections (elbows, reduction pipes, flanges etc.) is often put off because of the high cost of manufacture.
The captors as a whole are managed by a system of data acquisition.
The captors as a whole are managed by a system of data acquisition.
Online since: March 2020
Authors: Henry Hu, Xueyuan Nie, Anita Hu
The grain refinement and the massive presence of the secondary MgZn phase at the boundaries of the refined grains should be responsible to the enhancement of the strengths and the reduction in the elongation.
The mechanical properties were evaluated by tensile testing, which were performed at ambient, on an Instron machine equipped with computer data acquisition system.
To maximize the composition reading of the energy dispersive spectroscopy (EDS) data, an etchant was applied to the polished specimens for microscopic examination.
Fig. 2 also presents the grain size measurements for all the three SC Mg-Zn alloys in comparison with the data in the literature for the similar PM alloys [19].
Medraj, Essential magnesium alloys binary phase diagrams and their thermochemical data, Journal of Materials, Vol 2014, 2014, Article ID 704283, http://dx.doi.org/10.1155/2014/704283, 33 pages
The mechanical properties were evaluated by tensile testing, which were performed at ambient, on an Instron machine equipped with computer data acquisition system.
To maximize the composition reading of the energy dispersive spectroscopy (EDS) data, an etchant was applied to the polished specimens for microscopic examination.
Fig. 2 also presents the grain size measurements for all the three SC Mg-Zn alloys in comparison with the data in the literature for the similar PM alloys [19].
Medraj, Essential magnesium alloys binary phase diagrams and their thermochemical data, Journal of Materials, Vol 2014, 2014, Article ID 704283, http://dx.doi.org/10.1155/2014/704283, 33 pages