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Online since: January 2019
Authors: Fang Po Li
It was seen that datas of four stress levels approximately distributed in a straight line.
Friction reduction research of drill-string longitudinal vibration based on asperity contact[J].
Online since: February 2011
Authors: Bao Wei Li, Tuan Zhao, Hong Tao Lin, Da Qiang Cang
Furthermore, the influences of some factors on the carbochlorination metallurgical process were investigated in details in order to obtain the basis datum for the comprehensive utilization of the niobium from Baogang tailings [6-12].
The addition of activated carbon in the tailings causes a markedly reduction of Gibbs free energy of the chlorination reaction of Nb2O5, obtaining a Gibbs free energy of the reaction.
Online since: January 2016
Authors: Rustam Kaibyshev
Datum points for temperatures of 300 and 400ºC from Ref. [7,8,10] are also included A significant strain hardening takes place initially followed by a well-defined steady-state flow.
Alternatively, an increase in temperature or a decrease in strain rate leads to a reduction in initial work hardening and extension of the steady-state flow stage.
Online since: December 2024
Authors: Iuliana Duma, Alin Constantin Murariu, Radu Nicolae Popescu
CO2, in tandem with other factors, accelerates the progression of the corrosion process, leading to a reduction in the pipe network's cross-sectional area.
Sci. 93, 012059, 2017 [9] Sk Kafi A., Golam K.: An Integrated Approach for Failure Analysis of Natural Gas Transmission Pipeline, CivilEng 2021, 2, 87–119. https://doi.org/10.3390/civileng2010006 [10] Aalirezaei A.: A Dynamic Predictive Analysis on Gas Pipeline Failure Consequence using Bayesian Network, Master of Applied Science in Industrial Systems Engineering University of Regina, Saskatchewan, 2021 [11] Povilaitis M., Alzbutas R.: Risk and uncertainty analysis of gas pipeline failure and gas combustion consequence, Stochastic Environmental Research and Risk Assessment, 28, pp. 1431–1446, 2014 [12] Qiaoyan Y., Lei H., Yanhao L., Chong C., Kai y, Jiaquan L.: Pipeline Failure Assessment Based on Fuzzy Bayesian Network and AHP, Journal of Pipeline Systems Engineering and Practice, 14 (1), 2023 [13] Phillip Dahlberg E., Bruno T.V.: Analysis of Gas Pipeline Failure, https://www.engineering.iastate.edu/~jdm/katrina/Data/Natural%20Gas/NG%20Transportation/Analysis%20of%20Gas%20Pipeline
Online since: December 2013
Authors: Abdul Mutalib Leman, Azian Hariri, Marzuki Ismail, Nuur Azreen Paiman
Based on other studies stated that the higher exposures to respirable particulate matter increase the reduction of forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC) [12-13].
Available at http://www.euro.who.int/__data/assets/pdf_file/0005/78638/E90038.pdf.
Online since: April 2014
Authors: D.A. Morton-Blake
More commonly however, transport in natural processes is active, the transporter becoming an ion pump that is driven by an external energy source such as the reduction in free energy that occurs in ATP hydrolysis.
Molecular dynamics Molecular dynamics calculations were performed using DL_POLY [10] together with custom-written programs for data preparation and processing.
The E = 0.5 data that we considered in Fig. 5 provides an amplitude of 30 Å and w = 1.8 ´ 1013 Hz; these quantities lead to a power P associated with the oscillations which is 2.7 ´ 10−18 J s–1 from a single channel molecule.
The velocities are taken from the data used to construct Fig. 9.
Online since: March 2022
Authors: Joel Díaz-Reyes, Oscar Secundino-Sánchez, José F. Sánchez-Ramírez, José S. Arias-Cerón, Miguel Galván-Arellano, Ángel Guillen-Cervantes
Furthermore, it causes the reduction of the NF diameter and, most important, the CP transformation.
The average crystallite size of the TiO2-NPs of the annealed TiO2-NF’s was estimated by applying the Scherrer-Debye equation to the dominant peak of the diffraction data Fig. 4.
By refining experimental XRD data the parameters of anatase and rutile unit cells can be calculated taking into account that both crystalline structures are tetragonal.
Eg variation as function of the AT’s was calculated from optical absorption data.
Online since: April 2014
Authors: Konja Knüppel, Peter Nyhuis
Due to the reduction of throughput times and stock levels, the workpieces have to be provided to the assembly systems increasingly just-in-sequence and in a large number of variants.
Figure 10: Measurement of the vertical flow speed in the cylinder [33] In order to be able to derive measures for the improvement of the flow conditions in the cylinder, the data obtained from the measurement were transferred to a simulation.
This was validated on the basis of the data of the PIV measurement (see Figure 11).
Figure 11: Validation of the simulation (left) with the data of the PIV measurement (right) Even if aerodynamic separation has still not been fully researched, important advantages can already be identified over conventional separation and feeding systems.
Online since: September 2023
Authors: Hammadi Larbi, Amira Aguenarous, Nassima Moussaoui-Khedam
Creep and recovery tests were carried out as follows: After a rest time of 600 s prior to the measurements, a constant shear stress = 0.5 Pa was applied to the samples and the compliance (J) was recorded as a function of creep time; at t = 180 s the stress was set to zero and the recoverable part of compliance was measured as a function of the recovery time equal to 180 s. 2.3.6 Statistical analysis Statistical data entry and analysis were performed using IBM SPSS Statistics version 25.0 software.
This test was applied for statistical comparison of the measured data; to estimate the differences in the size of the oil globules between the different multiple emulsions at D0 and for the variation in globule size and conductivity between D0 and D28.
In this study, when the concentration of xanthan gum was increased from 0.05 wt% to 0.175 wt% (ME1 and ME5), an outstanding reduction of the average diameters respectively from 68 µm to 18.21µm (p-value =0.011) was observed.
Experimental data were fitted to a modified cross model (Eq.2) developed by Grassi et al [25] which has been successfully employed in weak get systems.
Online since: June 2013
Authors: Badis Haddag, Mohammed Nouari, Claude Barlier, Julien Thil
Recently, Atlati et al. [32] have introduced a new parameter, called segmentation intensity ratio based on the evolution of the plastic strain along the chip length, and Kouadri et al. [33] other parameters based on dimension characteristics of the chip to quantify the chip segmentation phenomenon, and explain ([32], [33]) with these parameters the cutting force reduction with cutting speed increase.
Hering, Detection of chatter vibration in a drilling process using multivariate control charts, Computational Statistics and Data Analysis 52 (2008) 3208-3219
Theis, Spiralling in BTA deep-hole drilling: models of varying frequencies, From Data and Information Analysis to Knowledge Engineering, Studies in Classification, Data Analysis, and Knowledge Organization (2006) 510-517
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