The Experts below are selected from a list of 349701 Experts worldwide ranked by ideXlab platform
S.h. Hashemi - One of the best experts on this subject based on the ideXlab platform.
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Strength–hardness Statistical Correlation in API X65 steel
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2011Co-Authors: S.h. HashemiAbstract:Abstract Accurate determination of pipe yield strength (as an indication of material resistance to plastic collapse) is of great importance to pipeline engineers. In this research, Vickers hardness data from 100 tested pipes (API X65) was used to derive strength–hardness Statistical Correlation. First, hardness data were measured in different sub-zones of weldment (i.e. weld metal, HAZ, and base metal). Next, tensile properties of base and weld metal were measured on flat tensile strips. The minimum, maximum, mean and standard deviation of test data were calculated then for Statistical variation and difference of mean value in each test zone. All test data were described by probability density function (PDF), and zones with the largest variance were determined. It was shown that hardness data could be used for yield strength prediction in API X65 steel with reasonable accuracy. Discussion on weldment microstructure Correlation with strength and hardness data concluded the paper.
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strength hardness Statistical Correlation in api x65 steel
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2011Co-Authors: S.h. HashemiAbstract:Abstract Accurate determination of pipe yield strength (as an indication of material resistance to plastic collapse) is of great importance to pipeline engineers. In this research, Vickers hardness data from 100 tested pipes (API X65) was used to derive strength–hardness Statistical Correlation. First, hardness data were measured in different sub-zones of weldment (i.e. weld metal, HAZ, and base metal). Next, tensile properties of base and weld metal were measured on flat tensile strips. The minimum, maximum, mean and standard deviation of test data were calculated then for Statistical variation and difference of mean value in each test zone. All test data were described by probability density function (PDF), and zones with the largest variance were determined. It was shown that hardness data could be used for yield strength prediction in API X65 steel with reasonable accuracy. Discussion on weldment microstructure Correlation with strength and hardness data concluded the paper.
R Tielert - One of the best experts on this subject based on the ideXlab platform.
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ISCAS - 3.1-to-7GHz UWB impulse radio transceiver front-end based on Statistical Correlation technique
2008 IEEE International Symposium on Circuits and Systems, 2008Co-Authors: M Anis, R Tielert, Norbert WehnAbstract:This paper presents the UWB impulse radio transceiver front-end based on Statistical Correlation technique between multiple band-pass filters tuned within UWB spectrum. The band-pass filters can detect energy either from transmitted UWB impulses, interfering channels or noise. Transmitted UWB impulses can be extracted by Statistical Correlation in between the outputs of band-pass filters. Super-regenerative receivers, tuned within 3.1-to-7 GHz UWB spectrum, act as band-pass filters. Summer and comparator perform Statistical Correlation. The test structure of transceiver has been implemented on 0.18 mum CMOS technology, active area of 1.44 mm2, sensitivity of -99 dBm and -30 dB SIR with power consumption of 15 mW at 1.5 V.
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Low power UWB impulse radio transceiver front-end based on Statistical Correlation technique
2007 IEEE International Conference on Ultra-Wideband, 2007Co-Authors: M Anis, R TielertAbstract:In this paper, we propose low power architecture to extract UWB pulse radio signals from noise level in the presence of narrow band interfering channels based on two dimensional Statistical Correlation technique. The receiver consists of many narrow band-pass filters, which extract energy either from transmitted UWB signal, interfering channels or noise. Transmitted UWB data can be extracted by Statistical Correlation of multiple band-pass filter outputs. Super-regenerative receivers, tuned within UWB spectrum, act as band-pass filters. Summer and comparators perform Statistical Correlation. Synchronization is achieved by clock and data recovery (CDR) circuit. The test structure of transceiver has been implemented on 1.08 mum CMOS technology, active area of 3.15 mm2, and data exchange rate of 8 Mbits/s with power consumption of 3 mw at 1.5 V Index Terms-Low power, ultra-wide band (UWB), super-regenerative receiver, interference mitigation, RF oscillator.
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design of uwb pulse radio transceiver using Statistical Correlation technique in frequency domain
Advances in Radio Science, 2007Co-Authors: M Anis, R TielertAbstract:Abstract. In this paper, we propose a new technique to extract low power UWB pulse radio signals, near to noise level, using Statistical Correlation technique in frequency domain. The receiver consists of many narrow bandpass filters which extract energy either from transmitted UWB signal, interfering channels or noise. Transmitted UWB data can be eliminated by Statistical Correlation of multiple bandpass filter outputs. Super-regenerative oscillators, tuned within UWB spectrum, are designed as bandpass filters. Summers and comparators perform Statistical Correlation.
Teresa M Escribanobailon - One of the best experts on this subject based on the ideXlab platform.
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Statistical Correlation between flavanolic composition colour and sensorial parameters in grape seed during ripening
Analytica Chimica Acta, 2010Co-Authors: Raul Ferrergallego, Matilde Garciamarino, Jose Miguel Hernandezhierro, Julian C Rivasgonzalo, Teresa M EscribanobailonAbstract:Abstract The aim of this work has been to determine the Correlations between sensory analysis, colour and content of main flavanols present in seeds. For this, the flavanic composition of grape seeds with different degrees of maturity was analysed by HPLC–DAD-MS and the obtained results were correlated with CIELab colour parameters, perceived colour (C), hardness of the seed (HS), tannic intensity (TI) and astringency (A). Multiple linear regression analysis (MLR) with the variables showing significant Correlations (p
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Statistical Correlation between flavanolic composition colour and sensorial parameters in grape seed during ripening
Analytica Chimica Acta, 2010Co-Authors: Raul Ferrergallego, Matilde Garciamarino, Jose Miguel Hernandezhierro, Julian C Rivasgonzalo, Teresa M EscribanobailonAbstract:The aim of this work has been to determine the Correlations between sensory analysis, colour and content of main flavanols present in seeds. For this, the flavanic composition of grape seeds with different degrees of maturity was analysed by HPLC–DAD-MS and the obtained results were correlated with CIELab colour parameters, perceived colour (C), hardness of the seed (HS), tannic intensity (TI) and astringency (A). Multiple linear regression analysis (MLR) with the variables showing significant Correlations (p < 0.05) was also performed. Grape seeds undergo important decreases in the content of catechins and procyanidin oligomers during ripening. Epicatechin-(4-8)-epicatechin-3-O-gallate (B2G) and (−)-epicatechin-3-O-gallate (ECG) are the flavanolic compounds whose contents decrease most. The changes in the phenolic composition accompany changes in TI, A and HS. The total content of flavanols in the seed is not the only factor affecting these attributes, since samples containing higher contents in flavanols can exhibit less astringency and tannic intensity than others with lower ones. The qualitative profile of the seeds is, therefore, also responsible for the sensations elicited in the mouth. A and HS parameters are more affected by the presence of galloylated dimeric procyanidins in the molecule than TI. CIELab colour parameters of seeds have high Correlation coefficients with many flavanolic compounds. ECG was the compound most related to these parameters.
M Anis - One of the best experts on this subject based on the ideXlab platform.
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ISCAS - 3.1-to-7GHz UWB impulse radio transceiver front-end based on Statistical Correlation technique
2008 IEEE International Symposium on Circuits and Systems, 2008Co-Authors: M Anis, R Tielert, Norbert WehnAbstract:This paper presents the UWB impulse radio transceiver front-end based on Statistical Correlation technique between multiple band-pass filters tuned within UWB spectrum. The band-pass filters can detect energy either from transmitted UWB impulses, interfering channels or noise. Transmitted UWB impulses can be extracted by Statistical Correlation in between the outputs of band-pass filters. Super-regenerative receivers, tuned within 3.1-to-7 GHz UWB spectrum, act as band-pass filters. Summer and comparator perform Statistical Correlation. The test structure of transceiver has been implemented on 0.18 mum CMOS technology, active area of 1.44 mm2, sensitivity of -99 dBm and -30 dB SIR with power consumption of 15 mW at 1.5 V.
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Low power UWB impulse radio transceiver front-end based on Statistical Correlation technique
2007 IEEE International Conference on Ultra-Wideband, 2007Co-Authors: M Anis, R TielertAbstract:In this paper, we propose low power architecture to extract UWB pulse radio signals from noise level in the presence of narrow band interfering channels based on two dimensional Statistical Correlation technique. The receiver consists of many narrow band-pass filters, which extract energy either from transmitted UWB signal, interfering channels or noise. Transmitted UWB data can be extracted by Statistical Correlation of multiple band-pass filter outputs. Super-regenerative receivers, tuned within UWB spectrum, act as band-pass filters. Summer and comparators perform Statistical Correlation. Synchronization is achieved by clock and data recovery (CDR) circuit. The test structure of transceiver has been implemented on 1.08 mum CMOS technology, active area of 3.15 mm2, and data exchange rate of 8 Mbits/s with power consumption of 3 mw at 1.5 V Index Terms-Low power, ultra-wide band (UWB), super-regenerative receiver, interference mitigation, RF oscillator.
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design of uwb pulse radio transceiver using Statistical Correlation technique in frequency domain
Advances in Radio Science, 2007Co-Authors: M Anis, R TielertAbstract:Abstract. In this paper, we propose a new technique to extract low power UWB pulse radio signals, near to noise level, using Statistical Correlation technique in frequency domain. The receiver consists of many narrow bandpass filters which extract energy either from transmitted UWB signal, interfering channels or noise. Transmitted UWB data can be eliminated by Statistical Correlation of multiple bandpass filter outputs. Super-regenerative oscillators, tuned within UWB spectrum, are designed as bandpass filters. Summers and comparators perform Statistical Correlation.
Raul Ferrergallego - One of the best experts on this subject based on the ideXlab platform.
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Statistical Correlation between flavanolic composition colour and sensorial parameters in grape seed during ripening
Analytica Chimica Acta, 2010Co-Authors: Raul Ferrergallego, Matilde Garciamarino, Jose Miguel Hernandezhierro, Julian C Rivasgonzalo, Teresa M EscribanobailonAbstract:Abstract The aim of this work has been to determine the Correlations between sensory analysis, colour and content of main flavanols present in seeds. For this, the flavanic composition of grape seeds with different degrees of maturity was analysed by HPLC–DAD-MS and the obtained results were correlated with CIELab colour parameters, perceived colour (C), hardness of the seed (HS), tannic intensity (TI) and astringency (A). Multiple linear regression analysis (MLR) with the variables showing significant Correlations (p
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Statistical Correlation between flavanolic composition colour and sensorial parameters in grape seed during ripening
Analytica Chimica Acta, 2010Co-Authors: Raul Ferrergallego, Matilde Garciamarino, Jose Miguel Hernandezhierro, Julian C Rivasgonzalo, Teresa M EscribanobailonAbstract:The aim of this work has been to determine the Correlations between sensory analysis, colour and content of main flavanols present in seeds. For this, the flavanic composition of grape seeds with different degrees of maturity was analysed by HPLC–DAD-MS and the obtained results were correlated with CIELab colour parameters, perceived colour (C), hardness of the seed (HS), tannic intensity (TI) and astringency (A). Multiple linear regression analysis (MLR) with the variables showing significant Correlations (p < 0.05) was also performed. Grape seeds undergo important decreases in the content of catechins and procyanidin oligomers during ripening. Epicatechin-(4-8)-epicatechin-3-O-gallate (B2G) and (−)-epicatechin-3-O-gallate (ECG) are the flavanolic compounds whose contents decrease most. The changes in the phenolic composition accompany changes in TI, A and HS. The total content of flavanols in the seed is not the only factor affecting these attributes, since samples containing higher contents in flavanols can exhibit less astringency and tannic intensity than others with lower ones. The qualitative profile of the seeds is, therefore, also responsible for the sensations elicited in the mouth. A and HS parameters are more affected by the presence of galloylated dimeric procyanidins in the molecule than TI. CIELab colour parameters of seeds have high Correlation coefficients with many flavanolic compounds. ECG was the compound most related to these parameters.
