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Online since: November 2011
Authors: Yan Qiu, Jian Jun Song
The data from this study suggest A. manihot flower extract has significant potential to use as health supplements and nutraceuticals.
Gordon [17] reported that the antioxidant action of reductions is based on the breaking of the free-radical chain by donating a hydrogen atom.
Gordon [17] reported that the antioxidant action of reductions is based on the breaking of the free-radical chain by donating a hydrogen atom.
Online since: February 2011
Authors: Min Xia Chen, Zhen Yi Huang, Chang Hong Li, Sheng Fu Wu, Wei Wang, Jian Liu, Da Lun He
The simulation results can be used to verify the accuracy of stress and strain field measured data for the mill frame, It also can infer parts of rolling mill which is not detected and unpredictable of the stress and strain states, and further to learn about weak parts of frame in stiffness and strength facets.
,screw hole of upright post, the chamfering part of inner upright post and where the top and bottom transverse beams and upright post both sides links,besides,the juction of top transverse beam and outer circle surface of screw down nut.But the maximum stress in these parts is much less than the stress of largest part.Therefore,the reduction nut hole is the most vulnerable parts of the mill stand.because the weak parts exist,whichgreatly limits the increase in rolling force,even limits the mill more productive ultimately.Therefore, the reasonable size of the structure should be designed to attach great importance during a further improvement in the mill reformation to ensure the safety of the overall intensity of the stand[2].
,screw hole of upright post, the chamfering part of inner upright post and where the top and bottom transverse beams and upright post both sides links,besides,the juction of top transverse beam and outer circle surface of screw down nut.But the maximum stress in these parts is much less than the stress of largest part.Therefore,the reduction nut hole is the most vulnerable parts of the mill stand.because the weak parts exist,whichgreatly limits the increase in rolling force,even limits the mill more productive ultimately.Therefore, the reasonable size of the structure should be designed to attach great importance during a further improvement in the mill reformation to ensure the safety of the overall intensity of the stand[2].
Online since: November 2012
Authors: Yong Zhou, Yu Feng Zhang, Hong Kai Jiang
The principle of the nonlinear PID parameters is proposed, the tables of the detailed data are presented.
(2) Introduction of integral regulation promotes the system indifference and enhances the system steady state performance at the cost of reduction in system stability.
(2) Introduction of integral regulation promotes the system indifference and enhances the system steady state performance at the cost of reduction in system stability.
Online since: August 2023
Authors: Radu Nicolae Popescu, Iuliana Duma, Nicuşor Alin Sîrbu, Victor Verbiţchi, Adrian M. Câmpurean
This narrow groove preparation is also expected to have a contribution to the reduction of the necessary filler material.
Advantages of this variant of the GMAW process consist in productivity increase, by reduction of the bevel angle of the joint and also gains related to the mechanical/metallurgical properties, allied with lower susceptibility to defects, such as lack of fusion.
The chemical composition and the mechanical properties of plates of the steel S355J2+N are presented in the mentioned articles [1-7], as reference data for the development of the gas-metal-arc technology, with soun-arc and weaving facilities. 2.2.
This reduces labor costs - Three layers have been executed by the presented welding test piece, which also leads to reduction of material and labor costs, compared with similar welding operation, where five layers were used - High welding speed values in the range of 20 – 35 cm / min allow high productivity - The main original element of the presented technology consists in the combination of the spin-arc action on the wire-electrode, with the linear oscillation movement of the welding head, which both allow higher deposition rate.
Advantages of this variant of the GMAW process consist in productivity increase, by reduction of the bevel angle of the joint and also gains related to the mechanical/metallurgical properties, allied with lower susceptibility to defects, such as lack of fusion.
The chemical composition and the mechanical properties of plates of the steel S355J2+N are presented in the mentioned articles [1-7], as reference data for the development of the gas-metal-arc technology, with soun-arc and weaving facilities. 2.2.
This reduces labor costs - Three layers have been executed by the presented welding test piece, which also leads to reduction of material and labor costs, compared with similar welding operation, where five layers were used - High welding speed values in the range of 20 – 35 cm / min allow high productivity - The main original element of the presented technology consists in the combination of the spin-arc action on the wire-electrode, with the linear oscillation movement of the welding head, which both allow higher deposition rate.
Online since: September 2017
Authors: Mikhail M. Kosukhin, N.A. Shapovalov, A.M. Kosukhin
The colloid and chemical bases on creation of highly effective multifunctional modifiers were developed on the basis of the experimental data in the field of chemical modifying of concrete compounds and concrete.
In general the stabilising effect of the surfactants is estimated by the degree of stability of the disperse system, modified by the data of surfactants, by the maximum surface, stabilized by surfactants in case of the given concentration and also by the limit concentration Ce.
Considering the available data on the structure, properties of plasticisers, their influence on colloid and chemical properties of mineral suspensions, the following requirements were offered to the oligomeric molecules in the study [24].
During the experiment the minimum quantity of the sulfuric acid, which was used at the stage of sulfonation, was determined by completeness of sulfonation and by absence of water insoluble impurities; the maximum quantity was determined by the beginning of reduction in MM intensity.
In general the stabilising effect of the surfactants is estimated by the degree of stability of the disperse system, modified by the data of surfactants, by the maximum surface, stabilized by surfactants in case of the given concentration and also by the limit concentration Ce.
Considering the available data on the structure, properties of plasticisers, their influence on colloid and chemical properties of mineral suspensions, the following requirements were offered to the oligomeric molecules in the study [24].
During the experiment the minimum quantity of the sulfuric acid, which was used at the stage of sulfonation, was determined by completeness of sulfonation and by absence of water insoluble impurities; the maximum quantity was determined by the beginning of reduction in MM intensity.
Online since: April 2023
Authors: Salima Borsali
In the field of biotechnology, various computer bugs caused by round ing errors can induce an error interval that is too wide during data acquisition.
The set approach based on interval arithmetic is well suited in the biotechnology field because in these cases the error interval introduced during data acquisition is too wide as is also the case in biology, chemistry or medical sciences.
Constraint propagation on intervals allows on a predefined domain of variables, a considerable reduction in the size of a box [x] without resorting to bisections.
“Measurements data analysis and control methods in wastewater treatment plants state of the art and future trends”.
The set approach based on interval arithmetic is well suited in the biotechnology field because in these cases the error interval introduced during data acquisition is too wide as is also the case in biology, chemistry or medical sciences.
Constraint propagation on intervals allows on a predefined domain of variables, a considerable reduction in the size of a box [x] without resorting to bisections.
“Measurements data analysis and control methods in wastewater treatment plants state of the art and future trends”.
Online since: October 2015
Authors: Jaimal Singh Khamba, Chandan Deep Singh
It takes a confirmatory rather than an exploratory approach for the data analysis.
Figure 3 Theoretical framework of the SEM_TPM model SCREENING OF THE DATA WITH PRELIMINARY ANALYSES After the data has been collected through the questionnaires, various data examination techniques was applied on the data like test for skewness and kurtosis i.e. normality test, CFA, test for the reliability of the data, so as to check and increase confidence in the data obtained.
SEM analysis requires that the data sample should be multivariate normally distributed.
As there is no method to test the multivariate normality of the sample data using AMOS or SPSS software.
After removing the items from their respective variables, test for reliability of the data is done using Cronbach's Alpha which is a reliability measure of the data for testing internal consistency.
Figure 3 Theoretical framework of the SEM_TPM model SCREENING OF THE DATA WITH PRELIMINARY ANALYSES After the data has been collected through the questionnaires, various data examination techniques was applied on the data like test for skewness and kurtosis i.e. normality test, CFA, test for the reliability of the data, so as to check and increase confidence in the data obtained.
SEM analysis requires that the data sample should be multivariate normally distributed.
As there is no method to test the multivariate normality of the sample data using AMOS or SPSS software.
After removing the items from their respective variables, test for reliability of the data is done using Cronbach's Alpha which is a reliability measure of the data for testing internal consistency.
Online since: May 2012
Authors: Ayari Samia, Nouira Kaouther, Trabelsi Abdelwahed
However, they fail to detect extreme events because of their presumed linear form of data.
The data The database used in this study consists of hourly and daily time series of PM10 and meteorological data observed in Sfax Southern Suburbs from 2005 to 2009.
The statistics of PM10 and meteorological data are presented in Table 1.
ARIMA models One of the methods used for analyzing time series data is the Box-Jenkins ARIMA approach which consists of extracting the predictable behavior from the observed data [15].
It uses lags and shifts in the historical data to uncover pattern and predict the future.
The data The database used in this study consists of hourly and daily time series of PM10 and meteorological data observed in Sfax Southern Suburbs from 2005 to 2009.
The statistics of PM10 and meteorological data are presented in Table 1.
ARIMA models One of the methods used for analyzing time series data is the Box-Jenkins ARIMA approach which consists of extracting the predictable behavior from the observed data [15].
It uses lags and shifts in the historical data to uncover pattern and predict the future.
Online since: October 2010
Authors: Yi Qing Lv, Hong Fu Liu, Jian Jun Yang
Based on geological data, a case of the
mining areas of Fengmaoding anti-dip slope in China was studied using simulation analysis
methods.
parameter of rock((((soil)))) Type of rock (soil) E / MPa c / MPa υ γ / Nmm -3 φ / ° Loess Homogeneous degree 1 1 100 100 24 Average 80 33 0.40 2.7×10 -5 Sandstone and mudstone layer Homogeneous degree 3 3 100 100 35 Average 2000 1 0.30 2.5×10 -5 Mudstone Homogeneous degree 2 2 100 100 25 Average 1000 1 0.35 2.3×10 -5 Sandstone Homogeneous degree 3 3 100 100 45 Average 3000 3 0.25 2.5×10 -5 Coal Homogeneous degree 1 1 100 100 28 Average 1000 2 0.27 1.5×10 -5 Limestone Homogeneous degree 4 4 100 100 40 Average 4000 11 0.35 2.6×10 -5 Fault belt Homogeneous degree 1 1 100 100 25 Average 10 1 0.40 1.8×10 -6 Note: ratio of compressive and tension is 1/10; Residual threshold coefficient 0.1; Maximum strain coefficient is 1.5; The maximum compressive strain coefficient is 200; poisson ratio coefficient after the destruction of loess is 1.0; rock destruction poisson ratio coefficient is 1.2; and reduction
parameter of rock((((soil)))) Type of rock (soil) E / MPa c / MPa υ γ / Nmm -3 φ / ° Loess Homogeneous degree 1 1 100 100 24 Average 80 33 0.40 2.7×10 -5 Sandstone and mudstone layer Homogeneous degree 3 3 100 100 35 Average 2000 1 0.30 2.5×10 -5 Mudstone Homogeneous degree 2 2 100 100 25 Average 1000 1 0.35 2.3×10 -5 Sandstone Homogeneous degree 3 3 100 100 45 Average 3000 3 0.25 2.5×10 -5 Coal Homogeneous degree 1 1 100 100 28 Average 1000 2 0.27 1.5×10 -5 Limestone Homogeneous degree 4 4 100 100 40 Average 4000 11 0.35 2.6×10 -5 Fault belt Homogeneous degree 1 1 100 100 25 Average 10 1 0.40 1.8×10 -6 Note: ratio of compressive and tension is 1/10; Residual threshold coefficient 0.1; Maximum strain coefficient is 1.5; The maximum compressive strain coefficient is 200; poisson ratio coefficient after the destruction of loess is 1.0; rock destruction poisson ratio coefficient is 1.2; and reduction
Online since: December 2013
Authors: Tomáš Vavřiník, Jan Zatloukal
Data from the measured and visual evaluation of specimen damage were used for comparison of specimen projectile impact resistance in relation to the used material.
1.
Principal improve in the projectile impact resistance was in scabbing reduction.
Principal improve in the projectile impact resistance was in scabbing reduction.