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Online since: May 2011
Authors: Xiao Yong Mao, Wei Hua Guo, Li Li Li
Data from the tests is utilized to study the fire response of CES columns, which can be a reference to the practical fire design of CES columns subjected to 3-side heating.
The test equipment is composed of a heating chamber (insulated with fireproof fiber), automatic fire control system, loading system, data collection system, high temperature camera device and displacement acquisition equipment.
Temperature and displacement data was collected by programmable computer system.
Results and discussion Data generated from the above fire test is utilized to evaluate the fire response of CES columns under different conditions.
Further, the second-order-effect (P-Δ effect) gets amplified with the shifting of the axial force caused by reduction in cross-section as a result of spalling.
The test equipment is composed of a heating chamber (insulated with fireproof fiber), automatic fire control system, loading system, data collection system, high temperature camera device and displacement acquisition equipment.
Temperature and displacement data was collected by programmable computer system.
Results and discussion Data generated from the above fire test is utilized to evaluate the fire response of CES columns under different conditions.
Further, the second-order-effect (P-Δ effect) gets amplified with the shifting of the axial force caused by reduction in cross-section as a result of spalling.
Online since: July 2003
Authors: Sang Kwon Lee
The paper compares the performance of bilinear and
higher order time-frequency methods using synthetic data and vibration signals measured on the
engine block of the passenger car for identification of the dynamic characteristics of the engine valve
train system.
Such cross-terms require an alternative approach to their reduction.
Evidently the cross-term reduction is highly effective even for the non-oscillating components.
Fig. 6 Measured data from an automotive engine (a) Time series data.
(b) Enhanced data after two stage ALE.
Such cross-terms require an alternative approach to their reduction.
Evidently the cross-term reduction is highly effective even for the non-oscillating components.
Fig. 6 Measured data from an automotive engine (a) Time series data.
(b) Enhanced data after two stage ALE.
Online since: June 2017
Authors: M. Vázquez da Silva, P. Paula, João M.P.Q. Delgado
Openings must be medium and allow the entry of sunshine during the winter, Figure 4 illustrates the climatic data of temperature and relative humidity for the city of São Paulo.
Data of temperature and relative humidity of for the city of Petrolina, Pernambuco, place of study of the prototype, are presented in Figure 6.
Temperature and relative humidity data for the city of Recife-PE is presented in Figure 7 Numerical Analysis The WUFI Plus allows realistic calculation of the transient hygrothermal behaviour of multi-layer building components exposed to natural climate conditions [13].
The use of advanced hygrothermial simulation software requires accurate weather data files, to simulate as real as possible the satisfactory conditions of comfort and energy needs in buildings.
Nerveless, the use of insulated walls and roof leads to a reduction of 1.2% in the 50th percentile of temperature (from 26.30 to 25.99 ºC) and of 1.6 % in the 95th percentile (from 27.56 to 27.13 ºC).
Data of temperature and relative humidity of for the city of Petrolina, Pernambuco, place of study of the prototype, are presented in Figure 6.
Temperature and relative humidity data for the city of Recife-PE is presented in Figure 7 Numerical Analysis The WUFI Plus allows realistic calculation of the transient hygrothermal behaviour of multi-layer building components exposed to natural climate conditions [13].
The use of advanced hygrothermial simulation software requires accurate weather data files, to simulate as real as possible the satisfactory conditions of comfort and energy needs in buildings.
Nerveless, the use of insulated walls and roof leads to a reduction of 1.2% in the 50th percentile of temperature (from 26.30 to 25.99 ºC) and of 1.6 % in the 95th percentile (from 27.56 to 27.13 ºC).
Online since: March 2008
Authors: Yvan Houbaert, Fernando González, Daniel Ruiz
The reduction of
the peaks during the ageing after annealing is more noticeable in quenched specimens than in air
cooled ones, and in furnace cooled specimens the reduction is even smaller, indicating that the
process is really an ageing phenomenon.
The low frequency Z-peak height is not measured in the case of the FeSi-7 sample because the frequency at which the maximum is reached is not a reliable data.
The low frequency Z-peak height is not measured in the case of the FeSi-7 sample because the frequency at which the maximum is reached is not a reliable data.
Online since: December 2013
Authors: Shi Fu Zhang, Tian Min Liu, Qi Xin Zhang, Xiu Mei Shu, Shi Qiang Song, Zhi Han
Stop experiment when the failure data reaches sample size.
There is a conflict of test accuracy and cycle time reduction.
Through the probability distribution hypothesis test of failure data, that failure data obeys Weibull distribution is obtained.
The two step analysis method, construct data method and maximum likelihood estimation are common methods utilized in constant stress accelerated test data analysis.
Data collection and analysis of reliability[M].
There is a conflict of test accuracy and cycle time reduction.
Through the probability distribution hypothesis test of failure data, that failure data obeys Weibull distribution is obtained.
The two step analysis method, construct data method and maximum likelihood estimation are common methods utilized in constant stress accelerated test data analysis.
Data collection and analysis of reliability[M].
Online since: November 2014
Authors: Wen Hui Zhan
The bias separates the positive data points from the negative ones.
Describe the n attribute value of each data sample with an n-dimensional feature vector, that is and suppose there are m classes, with and ,... , Cm said.
Given an unknown data sample X, if assigning the unknown sample X to class Ci with the naive bayesian classification[10], it must be According to bayes' theorem, since is constant for all classes, maximum posterior probability can be converted to the maximum priori probability .
If there are many attributes and tuples in the training data set, calculation of may be very big. therefore, usually assume that each attribute value to be independent each other, such prior probability can be obtained from the training data set.
When the data set satisfy this independence assumption, the classification accuracy is higher, otherwise may be lower.
Describe the n attribute value of each data sample with an n-dimensional feature vector, that is and suppose there are m classes, with and ,... , Cm said.
Given an unknown data sample X, if assigning the unknown sample X to class Ci with the naive bayesian classification[10], it must be According to bayes' theorem, since is constant for all classes, maximum posterior probability can be converted to the maximum priori probability .
If there are many attributes and tuples in the training data set, calculation of may be very big. therefore, usually assume that each attribute value to be independent each other, such prior probability can be obtained from the training data set.
When the data set satisfy this independence assumption, the classification accuracy is higher, otherwise may be lower.
Online since: September 2013
Authors: Li Ya Cui, Xiang Shan Gong
The device is equivalent to a kind of reduction device.
Design of measurement & control system Hardware of the measurement & control system consists of IPC (industrial control computer), a DC power supply, AL204 digital electronic balance, PCI data acquisition card and SG-42 digital Teslameter.
In order to improve the measurement precision, the measurement data were obtained by the method of the average value in the measurement process.
Fig. 6 The 3D diagram of the magnetic balance Test results After debugging, at room temperature, using the system to test and analyze the magnetic susceptibility for aluminum, the test results is shown in Figure 7, and test data is shown in table 1.
Fig. 7 Measure result of the magnetic susceptibility for aluminum Table 1 Test data number electric current (A) magnetic field (H-1*10-4) Δ m (g) magnetic susceptibility (XV*10-6) 1 1.40 2.4270 0.0054 1.3850 2 1.80 1.9120 0.0094 1.4025 3 2.20 1.5580 0.0144 1.4081 4 2.60 1.3140 0.0203 1.3891 5 2.90 1.2000 0.0251 1.4212 6 3.50 1.0360 0.0342 1.4231 7 4.00 0.9360 0.0399 1.4135 Conclusions The system realizes the automatic removal and reset of the electromagnet, which can make the sample placed at the same position in a magnetic field, and realizes automatic measurement, data real-time display, data analysis, data storage and data print of the magnetic balance, which can enhance the convenience of measurement accuracy and measurement operations.
Design of measurement & control system Hardware of the measurement & control system consists of IPC (industrial control computer), a DC power supply, AL204 digital electronic balance, PCI data acquisition card and SG-42 digital Teslameter.
In order to improve the measurement precision, the measurement data were obtained by the method of the average value in the measurement process.
Fig. 6 The 3D diagram of the magnetic balance Test results After debugging, at room temperature, using the system to test and analyze the magnetic susceptibility for aluminum, the test results is shown in Figure 7, and test data is shown in table 1.
Fig. 7 Measure result of the magnetic susceptibility for aluminum Table 1 Test data number electric current (A) magnetic field (H-1*10-4) Δ m (g) magnetic susceptibility (XV*10-6) 1 1.40 2.4270 0.0054 1.3850 2 1.80 1.9120 0.0094 1.4025 3 2.20 1.5580 0.0144 1.4081 4 2.60 1.3140 0.0203 1.3891 5 2.90 1.2000 0.0251 1.4212 6 3.50 1.0360 0.0342 1.4231 7 4.00 0.9360 0.0399 1.4135 Conclusions The system realizes the automatic removal and reset of the electromagnet, which can make the sample placed at the same position in a magnetic field, and realizes automatic measurement, data real-time display, data analysis, data storage and data print of the magnetic balance, which can enhance the convenience of measurement accuracy and measurement operations.
Online since: October 2013
Authors: Xing Jun Hu, De Jiu Wu, Bo Yang
It could be seen there were good agreement between the BART experimental data [3] and Domain1 results.
And the Domain2 results also show good agreement with the limited, readable Lockheed data [5].
The same flow features were demonstrated in BART experimental data [3].
On the contrary, there was only one saddle point in the Domain2 simulation but three ones were shown in the Lockheed data.
Potential for Aerodynamic Drag Reduction in Car Design.
And the Domain2 results also show good agreement with the limited, readable Lockheed data [5].
The same flow features were demonstrated in BART experimental data [3].
On the contrary, there was only one saddle point in the Domain2 simulation but three ones were shown in the Lockheed data.
Potential for Aerodynamic Drag Reduction in Car Design.
Online since: July 2014
Authors: Hui Yuan
Destination point for disaster mapping is to provide a basis for maps and data governance design.
Hatch measurement accuracy directly affects the strength parameters and calculate the real thrust of his landslide slip surface to avoid or control engineering design outweigh benefits too small, is designed to meet the data protection required for exploration projects.
Surveying the landslide hatch, because staff is not easy to climb, use the free edge of the ideal total station measurement data collection; sectional governance for the proposed project site mapping, measuring a straight line under the GPS-RTK stakeout mode most suitable profile points.
Existing accident photogrammetric systems generally use an ordinary digital camera or digital video camera as a measuring device, using a desktop computer or a laptop as a data processing and analysis equipment, using the mouse and keyboard as input means for the accident scene can figure collection, site icon fixed, coordinate transformation, dimensioning, and the scene of the accident site map print management data collected to provide support.
Conclusion On the one hand, disaster prevention, the engineering survey is the basis for the exploration of the design work, surveying maps and data from the survey, design and construction throughout the entire engineering process.
Hatch measurement accuracy directly affects the strength parameters and calculate the real thrust of his landslide slip surface to avoid or control engineering design outweigh benefits too small, is designed to meet the data protection required for exploration projects.
Surveying the landslide hatch, because staff is not easy to climb, use the free edge of the ideal total station measurement data collection; sectional governance for the proposed project site mapping, measuring a straight line under the GPS-RTK stakeout mode most suitable profile points.
Existing accident photogrammetric systems generally use an ordinary digital camera or digital video camera as a measuring device, using a desktop computer or a laptop as a data processing and analysis equipment, using the mouse and keyboard as input means for the accident scene can figure collection, site icon fixed, coordinate transformation, dimensioning, and the scene of the accident site map print management data collected to provide support.
Conclusion On the one hand, disaster prevention, the engineering survey is the basis for the exploration of the design work, surveying maps and data from the survey, design and construction throughout the entire engineering process.
Online since: August 2016
Authors: Lindemberg Ferreira dos Santos, Erijanio Nonato Silva, Rodrigo Amaral de Codes, Rodrigo Nogueira de Codes
And for the connection with the testing machine, a common computer was used for data acquisition.
This function is essential because from it the data to study the mechanical material properties are obtained.
Fig. 4 (a) shows the stress-strain curve plotted with strain data calculated from the displacement obtained by the LVDT provided from the testing machine.
However, these data are inaccurate and all the values of tensile modulus were calculated based on the stress-strain diagram plotted with the strain data obtained from the virtual gage obtained by digital image correlation and shown in Fig. 4 (b).
Therefore, in order to obtain more accurate results regarding the damage evolution, only data from DIC obtained by a virtual gage located near to necking part were used as shown in Fig. 4 (b).
This function is essential because from it the data to study the mechanical material properties are obtained.
Fig. 4 (a) shows the stress-strain curve plotted with strain data calculated from the displacement obtained by the LVDT provided from the testing machine.
However, these data are inaccurate and all the values of tensile modulus were calculated based on the stress-strain diagram plotted with the strain data obtained from the virtual gage obtained by digital image correlation and shown in Fig. 4 (b).
Therefore, in order to obtain more accurate results regarding the damage evolution, only data from DIC obtained by a virtual gage located near to necking part were used as shown in Fig. 4 (b).