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Online since: May 2014
Authors: C. Geffers, S. Hof, F. Prenger, K. Deckert, Uwe Reisgen, Matthias Angerhausen, Konrad Willms
More restrictive environmental requirements demand the future reduction of the vehicle weight.
The application of higher-strength steel materials allows the reduction of the vehicle weight with, at the same time, increase of the part strength.
This device allows, similar to other controlled short arc processes, the reduction of the input energy-per-unit length down to a minimum.
For the generation of the input data which are required for the planned surrogate model, experiments which were based on the results from preliminary tests have been planned and carried out using statistical design of experiments (DoE).
Examples of joining results DX56D+Z / EN AW-6016T4 with ZnAl4 The generation of the output data has been achieved by the evaluation of joining results with regard to previously set weld properties.
Online since: November 2012
Authors: Dmytro Vasiukov, Stephane Panier, Abdelkader Hachemi
Supporting the concept of non-linearity composites due to damage in [3] authors described evaluation of critical values of thermodynamic forces based on the tests data.
The program is post-treatment software dealing with data given after performed analysis in ABAQUS.
These data are input for executive direct simulation.
Results of simulation are written back to ABAQUS data base file to be visualized.
These results are in reasonably good agreement with published in literature and experimental data.
Online since: September 2005
Authors: N.Yu. Ermakova, Nikolay Y. Zolotorevsky, A.A. Zisman
Comparison of the model to local experimental data In order to test the model efficiency in predicting local textures, let us consider recently reported experimental data [3] on a coarse grained Al polycrystal subjected to axially symmetric compression at the room temperature.
However, the expreimental data [3], represented on the inverse pole fugure (IPF), Fig.2(a), do not confirm such an assumption.
Unfortunately, orientations of next neighbors to investigated actual grains (A1, A2, B1, B2) have not been recorded and such data can hardly be restored to the moment.
The simulation results are represented in Fig.2(b) and bears, in accordance with the experimental data [3], witness to divergence of reorientation paths.
In all, with no knowledge of real crystal orientations in the neighborhood, the obtained correspondence to experimental data seems to be satisfactory.
Online since: May 2017
Authors: Olexandra Tymoshenko, Vasiliy Prokopenko
It is proved that the plant will be able to allocate the necessary investment funds if mineral ore reserves is processed with a reduction of its quality.
The mechanism of ensuring ecological and economic efficiency of the iron-ore deposit exploitation Table 1 gives the approximate data of Poltava MPP concerning the volume of fixed assets, which ensure its production capacity, efficiency of using funds in general and their individual kinds.
This reduction of capital productivity ratio must be set off by the introduction of additional funds specified by the capacity and the cost of extracting ore production processes into operation.
To compensate this reduction in t-th year, additional equipment should be installed in the amount equal to , where is capital productivity ratio of і-th type of equipment.
Using equations (4) - (6), we calculated the investment costs required to restore  the pit fixed assets at different depths , departing from the data presented in Table 1.
Online since: March 2014
Authors: Beau Krieg, John Vine, Luther Krake
DSTO has recently developed two truncation techniques, capable of achieving large reductions in cycles while maintaining high-fidelity, realistic fatigue spectra.
Data The raw fatigue spectra data used to develop the truncation techniques discussed in this paper were generated using a DSTO developed spectrum generation process [1] which matched measured flight loads obtained from an S-70A-9 Black Hawk helicopter Flight Strain Survey [2] with a pseudo-randomly generated series of maneuvers, designed to match a defined usage spectrum.
The IRF method works as follows: Step 1: Rainflow cycle count [3] the stress spectrum and, in the process, store the original index (location within spectrum) of each data point for later reference.
The exceptions to this rule are the first and last TPs in the spectrum, which because they are bounded by data on one side only, can each only contribute to one half cycle: these points are left as is.
Further reductions in the number of turning points are achieved with each successive decrease in the Ncut-off criterion.
Online since: May 2013
Authors: Na Bai, Zhan Fang Wu, Xuan Li
The proposed scheme utilizes a new leakage current compensation circuit, resulting in a 42.9% reduction in the delay from bitline discharge to the date been read out.
Introduction With the increasing need of fast access and transfer data in PC, network and mobile communications, the demand for high-performance SRAM is increased significantly.
As shown in Fig. 8, the time during which the bitline starts to discharge to the data needed been read out by the proposed current SA is only 161ps.
Fig. 9 The corresponding histogram of the delay comparison As shown in Fig. 9, in the proposed design, the time needed to read out the required data can be reduced significantly.
Furthermore, as the parasitic capacitance increases, the delay reduction degree is also enlarged making the proposed design to be more effective.
Online since: October 2017
Authors: Olena Mokrousova, Mariia Marukhlenko, Olena Okhmat
The high level of absorption of chromium compounds and their reduction by 30 % in the exhaust fluid was found.
The use of montmorillonite dispersions provides qualitative formation of the structure of the dermis and physical and mechanical properties, with a reduction of tanning agents’ costs/waste by 16 %.
The data received are consistent with the results of studies of working tanning solution for solid residue content and minerals in it (Table 2).
The reduction of consumption of chrome tanning compounds by almost 20 % compared to the control (option 3) to the level of 1.25 % allows to reach content of Cr2О3 of 4.3 %, which complies with the requirements of regulations.
The analysis of the data received indicates that samples obtained by processing under option 3 have the optimal value of physical and mechanical properties.
Online since: September 2013
Authors: Zhan Jun Jiang, Yu Hong Liu, Dong Mei Zhou
Simulation results show that the proposed algorithm is superior to the conventional SS method, not only in the improvement of output SNR, but in the reduction of the speech distortion and residual musical noise.
In lower SNR conditions, it’s difficult to find the best tradeoff between the amount of noise reduction, the speech distortion and the level of residual noise in a perceptual sense.
In order to reduce the effect of the annoying musical noise, the form of SS algorithm is modified as [8]: (6) where α is the over-subtraction factor which determines the balance of the amount of noise reduction and speech distortion β is the noise spectral flooring which is the addition of background noise in order to mask the residual noise. γ1 and γ2 are the exponent factors, the typical values of γ1 and γ2 are 1 and 2 respectively.
Signal spectral is obtained by using Fast Fourier Transform over the Hamming windowed, half-overlapped input data buffer.
The power spectral of the windowed data is calculated and subtracted by the average noise spectral calculated during non-speech period.
Online since: February 2018
Authors: C. Daniel, L. Sarala, D. Tensing, S. Sundar Manoharan, Hemalatha G
The damper displacement due to an earthquake or strong wind, implies a reduction in the maximum damping force by about 15%.
The damper was fixed to the ground floor16 of the frame as shown in Fig. 8.a. and Fig 8. b. is Data Aquitition system connected with the shake table.
Data Acquisition, c).
The displacement was measured at all the floor levels through the data acquisition system.
Maximum vibration reduction for Shear mode MR damper was proved in Shake table test where the displacement reduced by 40 to 67%.
Online since: November 2015
Authors: Daniel Eugeniu Crunteanu, Valentin Ionut Misirliu, Oana Dumitrescu, Bogdan Gherman
In the past, two offset stream nozzle concepts were used for jet noise reduction.
This was accomplished with less than a half percent reduction in the nozzle mass flow and thrust performance at take-off conditions [4].
The input data are calculated using the engine cycle calculation program in which as imput data were taken the data about turbojet CFM56 7B-27 [6].
Thus for output of the jet after the secondary flow were considered the following data : - velocity = 308 m/s - temperature = 294 K - turbulence intensity = 5% - jet exit direction = perpendicular to/on inlet For the jet exit after the primary flow were considered the following data : - velocity = 465 m/s - temperature = 721 K - turbulence intensity = 5% - jet exit direction = perpendiculat to/on inlet The geometry of the nozzle is represented in Fig. 2.This is a copy of the geometry of the nozzle reaction from the turbojet CFM 56.
[3] Vance Dippold III, Lancert Foster, Michael Wiese, Computational Analyses of Offset Stream Nozzles for Noise Reduction , Journal of Propulsion and Power, Vol.25, No 1, January – February 2009
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