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Online since: August 2008
Authors: Maria do Carmo de Andrade Nono, Pedro José Castro, José Vitor C. Souza, A.R. Siqueira
Such microstructure inhomogeneity can cause a significant reduction in the driving force for densification.
Dielectric data are also given in terms of the frequency independent parameter Q×f0, which is used as a figure of merit for the comparison of loss properties.
Samples fo [GHz] Q Q x fo εr Relative density [%] Weight loss [%] A-ZrO2 + TiO2 7.7961 2210 17.229 22.40 75,25 ± 0.21 1.25 B-ZTO + SnO2 7.4840 1730 12.947 23.20 76.30 ± 0.15 3.25 C-ZTO + Nb2O5 7.5166 1790 13.455 23.10 78.06 ± 0.23 2.89 D-ZTO + SrO2 7.8736 2230 17.558 24.80 79.12 ± 0.10 1.90 (c) (b) (a) (x) (d) The Q × f0 values for ZrO2-TiO2 based are in good agreement with data reported for ceramics prepared via powder routes [10].
To our knowledge, the present data are the first results for the microwave dielectric properties of ZrO2-TiO2 bodies prepared by powder metallurgic method using groups of additives different, conform Table 1.
Since εr values depend on several factors (including second phases, cation ordering, density and weight loss) comparison with literature data is not easy.
Online since: January 2013
Authors: Zong Yu Liu, Wen Kai Xu, Hong Yu Zheng
Eric Krueger establishes a control strategy based on slip coefficient judgment in order to reduce the decelerations disturbances caused by reductions in regenerative brake torque [5].
The main data of the UDDS driving cycle is showed in table 1, and the curve of speed with time is showed in figure 4[6].
Table 1 Main data of UDDS driving cycle time[s] 1369 maximum speed [km·h-1] 91.29 mileage[km] 11.99 average speed [km·h-1] 31.52 average deceleration[m·s-2] -0.58 maximum acceleration[km·h-1] 1.48 average acceleration[m·s-2] 0.51 maximum deceleration[m·s-2] -1.48 The main data of Japanese 1015 driving cycle is showed in table 2.
The main data of results is showed in table 3.
Reducing Disturbances Caused by Reductions in Regenerative Brake Torque[C].SAE Paper 2011-01-0972
Online since: August 2013
Authors: Jun Peng, Shuo Li, Xiao Yong Zhang
According to the IEEE 1588 agreement, to synchronize train communication network time, four kinds of basic synchronous data datagram is needed: SYNC, Follow_UP, Delay_Rep and Delay_Resp.
Firstly slave node sends delay measurement request message Delay_Rep to the master node, and records the exact time of the sending time Ts3; Then the master node records accurate receiving time Tm3 after received message Delay_Rep, and sends delay measurement request data message Delay_Resp to slave node, in which contains message Tm3; Lastly after receiving Delay_Resp, we calculate the line Delay according to (3)
(3) In conclusion, The protocol of accurate clock synchronization draws the time deviation Offset and interconnect Delay value through exchanging timestamp information data message, but the premise is that the link propagation delay is symmetric, which means transmission delay between master clock to and slave clock dms is the same
As shown in Fig. 3 below, from 200ms, the accuracy of clock deviation value is improved after introducing Kalman filter for noise reduction processing, making compensation results more accurate and smooth.
This method reduces noise through the filtering processing for the synchronous acquisition information, which improves the accuracy of the data.
Online since: April 2006
Authors: B.K. Chen, S.Y. Tsay, C.P. Chen
All of the spectroscopic data obtained were in good agreement with the proposed structure.
The increase in Tg can be attributed to the strong interaction between the polymer and silicate surfaces because the nm size restricted segmental motion near the organic-inorganic interface.[5] These data indicate that these PI-clays have fairly high thermal stability.
Therefore, the efficiency of clay for modification of the mechanical properties is primarily determined by the degree of its dispersion in the matrix as demonstrated by XRD data.
The extent of CTE reduction depends on the clay dispersion and the amount of intercalation.
Conclusion The XRD and TEM data indicate that the MMT clay was dispersed in the polymer matrix at a nanometer scale.
Online since: October 2015
Authors: Michal Balog, Miroslav Mindas, Erik Szilagyi
This location data is transferred to the internal system and for example can be used to update customer information automatically and help to track and trace in real time position of the wagon.
Based in this data, the analysis was carried out in next table (Tab. 1).
These have direct impact to wear of friction elements of chassis and a direct result of safety of combination of vehicle, which reduction can cause serious accidents.
A gradual reduction in the thickness of the pad comes to demolition of the tag, wherein the outer manifestation will be illegibility of this RFID tag with tag reader [8].
The image (Fig. 8) shows the location, which is best in terms of the availability and effectiveness of the acquisition of correct data.
Online since: May 2018
Authors: Etienne Kolomoni Ngoy
The data logger was started, and the sample was tensioned to an initial stress of 11.4 0.2 MPa.
The relaxation is measured as relaxation amplitude representing the percentage reduction of the initial stress value.
For this analysis, experimental data up to 1000 seconds in Fig. 2 are used to predict relaxation at longer time scale 6000 seconds.
This procedure is applied to the curves fitted to the experimental data of Fig. 2 for several values of the relaxation amplitude as shown in Fig. 3 Fig. 3 Experimental determination of the activation energy for various relaxation amplitudes The straight lines resulting from such plots are usually parallel since the magnitude of the activation energy is normally constant.
(9) Since the shift factor is equal to , it can be directly determined from experimental data by plotting against relaxation amplitude as shown in Fig. 5.
Online since: September 2013
Authors: Dmitry Baimel, Saad Tapuchi
The closed loop servo control is performed by acquiring position/velocity data from position/velocity encoder that is integrated inside the servo motor.
According to the user's data, the PLC produces optimal position, velocity, and acceleration profiles that are fed to the servo closed control loop in real time (see Fig. 4a).
The advantage of the S-curve profile upon the trapezoidal profile is the reduction of mechanical stress on the motor (reduction of jerk).
There is only one loop (velocity loop) without consideration of position and acceleration data.
Special sensors would read the data from the brain and translate it to the digital signals for the control of robotic arms and legs.
Online since: September 2007
Authors: Nicolae Constantin, Marin Sandu, Mircea Găvan, Viorel Anghel, Ştefan Sorohan
In composites, the energy is largely absorbed in creating large areas of damage and thus the reduction in residual strength is higher.
The research work has collected data obtained during instrumented drop impact tests performed on various layered composite materials, in plate or tube shape.
Immediate correspondence with post-impact state of the material and with data obtained from numerical simulations offered the background for establishing some general observations concerning the possibility to get direct information about the damage assessment through simply recording the impact force history.
It is also intended to include the results obtained in a comprehensive data bank for designers' use.
The results obtained with the two codes are very close in respect of contact force history analysis, but the implicit method governing the ANSYS solver provides more detailed stress distribution data.
Online since: March 2011
Authors: Bin Zhang, Bi Wei Qiu, Fang Fang Ji, Jing Bo Chen, Chang Yu Shen
The scattered intensity of SAXS was presented as a function of scattering vector q, where q is given by q=4πsinθ/λ (2θ being scattering).The long period is determined from the Lorenz plots (I(q)*q2 vs q) of the background corrected scattering data.
Data presented in Table 1 demonstrate that Kβ decreases from 0.3101 to 0.1134 (reduction by 0.2) when the applied DR decreases from 10.8 to 4.8.
Meanwhile, Φβ decreases from 31.67 wt. % to 11.34 wt. % (reduction by 20%).
The characteristic length L =2π/qmax was determined from the SAXS data using the maximum qmax of I(q).
Table 1 Crystallinity data of the iPP extrudant concluded from WAXD and DSC measurements.
Online since: October 2013
Authors: Jun Qiang Bai, Lei Qiao, Jun Hua, Chen Wang
Comparison between experimental data and predicted skin friction coefficient of T3A test could be found in Fig.  2 above.
Transition prediction of Menter’s transition model that embedded in RANS method has good agreement with experimental data.
At the trailing edge, the flattened pressure gradient appeared in experimental data indicating a turbulent separation.
It is clearly visible that the TDDES result is in good agreement with measured data and TDES over predicted the trailing edge separation.
The eddy viscosity reduction can make the TDES model fail to capture the transition onset on T3A plate.
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