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Online since: January 2010
Authors: Chao Wang, Feng Su, Yun Peng Han
Radar signal processor is the core part of a radar system, and radar signal processing is one of the most important field of real time signal processing with characteristic of mass data and large computation.
TI's high performance digital signal processor TMS320C6416 can achieve a very high processing rate due to its VLIW architecture and packed data processing support.
We must point out that, in every processing node, data transferring (including fetching and sending) and data processing should work synchronously, using the "ping pong processing mode"0 and Direct Memory Access (DMA) technique.
The major advantages of using RTOS include real-time processing capability , high reliable system performance, reduction of development duration, and efficient task management.
Online since: February 2006
Authors: Yong Bum Park, Jong Kweon Kim, Shi Hoon Choi
They found that abnormal grain growth leads to an increase in the elastic modulus by porosity reduction, and a strong decrease in the yield strength by grain growth.
Automated EBSD scans were performed in stage-control mode with TSL data acquisition software.
Determination of the T needs the knowledge of a function which may describe the unloading data satisfactorily.
In the case of the as-deposited specimen, the elastic modulus calculated by the model is a good agreement with measured data at approximately 2%, ratio of indentation depth to the sample thickness.
For the annealed specimen, the elastic modulus calculated by the model is a good agreement with measured data at approximately 3.5%, ratio of indentation depth to the sample thickness.
Online since: September 2013
Authors: Jun Li, Wei Wei Li, Zhao Xin Wang
First, an open-loop experiment, for example a step test, is normally needed to get the required process data.
Second, approximations are involved in obtaining the process model g from the open-loop data.
The simplest is to directly obtain the controller from the closed-loop data, without explicitly obtaining an open-loop model g.
The main reason is that it is difficult in practice to obtain from experimental data accurate values of the overshoot and corresponding time if the overshoot is too small.
Simple analytic rules for model reduction and PID controller tuning, Journal of Process Control 13(2003)291-309
Online since: September 2007
Authors: Silvano Erlicher, Johanna Bodgi, Pierre Argoul
The processing of data provided by Decathlon [6] concerning lateral walking forces show a quasiperiodic behavior, with a typical right-left cycle like the one indicated in Fig. 1.
Experimental data lead to the values ofβ being between 0 and 10 [3].
Fig. 2- Walking speed vs. crowd density for different β values The second function 1≤)u(h & allows accounting for the influence of the lateral footbridge vibration on the crowd speed, in the sense that it imposes a speed reduction when pedestrians walk on a footbridge undergoing large oscillations.
The function )u(Sps & has two branches (Figure 3-b): the first one is a quadratic approximation of the ARUP data [1].
a) M/ηη u& b) Fig. 3- a) Coefficient )(Spp η , b) Coefficient )u(Sps & The previous definition of the synchronisation coefficient (Eq. 8) have some drawbacks: (i) the sum of two contributions is rather "artificial", (ii) the Spp coefficient is arbitrary and not based on experimental data, (iii) it is difficult to distinguish the effects in the case of a vibrating floor between the two synchronisations: the one between pedestrians and the other with the vibrations of the structure ; the synchronisation between pedestrians being induced by the synchronisation with the deck's vibrations.
Online since: June 2004
Authors: Atsuo Kawasuso, Masahito Yoshikawa, Ayahiko Ichimiya, Masaki Maekawa
S-E data and corresponding S-W plots as a function of incident positron energy at Vg= 0 V and Vg= -5V.
This indicates that the transportation of positrons to the aluminum gate electrode is suppressed because of reduction of depletion region by appearance of holes.
However, the data plotted in full circles in Fig. 3(d) can not superimpose to the data plotted in full circles in Fig.3(a).
Although positrons may pass through the SiO2/SiC interface, it seems to be difficult to consider that all positrons simply pass the SiO2 layer and annihilate at the gate material because of some incomprehensible phenomena [15]; for example differences of S-E data between MOSs fabricated by pyrogenic oxidation and that by dry oxidation.
Online since: March 2011
Authors: Nai Chao Chen, Ping He, Tian Yu Chen, Yu Jie Shen
And then cool down in the ambient air; 3) Load on the standard samples by the universal tensile testing machine; measure and record the distance of crack opening displacement using clamp extensometer. 4) Process the recorded data to obtain the fracture toughness of each standard sample by the COD method; 5) Dig the calculated data of fracture toughness to estimate the influence of high temperature and duration on fracture behavior.
Among them, the visual analysis method is applied for appraising the effects of orthogonal testing data.
At the same time, the similar tendency of curves for the temperature of 500 ºC, 400ºC and 350ºC is the effect of the fracture enhancement and reduction after 3 h and 5 h, respectively.
The visual analysis of experimental data shows that the short period high temperature and thermal shock have an impressive effect on the fracture toughness, and the thermal shock pays an important role on determining the terminal crack expansion.
Online since: October 2011
Authors: Li Yun Yang, Song Tao Wu
In addition, the long-term intake of heavy metals may lead to soil buffer ability reduction and groundwater pollution.
By analyzing the distribution of Cu, Zn and Cd in the soil of Beijing, this study got the basic information and data of the urban soil, and obtained the environmental quality conditions of soil in Beijing based on the evaluation on the pollution degree of the three heavy metals, which would provide basis to control soil quality and monitor environment effectively.
Data Selection.
To ensure effectiveness, comparability and timeliness of the evaluation, and limited to the present progress of soil quality research in Beijing, all the data are selected from the database after 2000 or the related data of topsoil (0 ~ 30cm) in Beijing from publications and books (Table 1).
Online since: April 2003
Authors: Y. Gao, X. Liu
Using the least squares algorithm to fit the difference expressions to actual phase difference data, obtained through a shearing interference measurement, the control points are obtained and the B-spline representation of the tested phase established.
Using the least square algorithm to fit the difference expressions to the phase differences data obtained by shearing interference measurement, the control points are achieved, so is the B-spline representation of the tested phase.
The proposed phase estimation algorithm was then applied to the two groups of difference data for phase reconstruction.
Fritz: Application of zernike polynomials to reduction of wave-front slope data, pp. 39-42, Optical Science Center, University of Arizona, 1977
Online since: March 2020
Authors: Olga V. Cheremisina, Maria A. Ponomareva, Daria A. Alferova, Victor A. Bolotov
To obtain data on the phase composition and specific surface area, dried to a constant weight at a temperature of 600°C (1 hour) and powdered manganese ore with 31.45 mg and 0.11 g, respectively, were used.
Adsorption and desorption isotherms for a sample of ferromanganese ore By mathematical processing of the data obtained by the method of polymolecular adsorption (the theory of Brunauer, Emmett and Teller – BET), a graphical dependency of Relative Pressure, P/P0 from 1/[W(P/P0-1)] is obtained, presented in Figure 4.
Table 2 presents data on the study of sorption of the gas mixture on manganese ore: Г=∆С∙V⸱Mm, (1) where Г – the value of sorption of manganese ore, the amount of grams of sorbent gas per kg of ore (g/kg); M – molar mass of gas, g/mol; ∆C – the difference between the initial and equilibrium concentrations, mol/l; V – the volume of the gas mixture, ml, V=200 ml; m – the weight of the ore sample,g.
As a result of the work, data on the phase composition and specific surface area of iron-manganese ore, as well as the content of physically and chemically bound water were obtained.
Bazhin, Improving the management process of the carbothermic reduction of metallurgical silicon, IOP Conf.
Online since: February 2022
Authors: Valery V. Golovkin, Oksana M. Batishcheva, Valery A. Papshev
The analysis of the data obtained made it possible to establish the maximum permissible values ​​of the M1 torque, at which the teeth of the taps are chipped, as well as the M2 torque, at which the taps in the holes break during operation.
Applying ultrasonic oscillations to the tap results in a significant reduction in wear compared to tapping without ultrasound.
Figure 4 provides the data on the impact of one of the most important processing parameters, i.e. tapping speed, on efficiency of taps, in terms of productivity.
Based on the obtained data, it can be concluded that taps with a titanium nitride coating have the highest performance when machining with forced ultrasonic oscillations.
Dependence of tap performance on vibration amplitude processed material: titanium alloy-VT9, process medium- sulfofresol, cutting speed - 1.2 m / min From the data presented, it is evident that for M12 taps the optimal amplitude is 5 - 6 microns, for M8 taps the optimal vibration amplitude is 5 microns, for M4 taps it is 4 microns, and for M3 balls about 3 microns.
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