The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
Kuang Bing - One of the best experts on this subject based on the ideXlab platform.
-
Concurrent Tolerancing Based on Process Factors and Signal-Noise Ratio Quality Loss
Computer Simulation, 2006Co-Authors: Kuang BingAbstract:The relationships between process factors and the costs of product were investigated. Using the practical statistic data, the comprehensive effect coefficient was obtained by regression analysis based on Matlab. As the result, the cost-tolerance function based on process factors was therefore established. In terms of given manufacture process planning, Signal-Noise Ratio (SNR) was employed to scale quality loss of each process. Concurrent tolerancing optimization model was then proposed to implement concurrent tolerance design by using cost-tolerance function and quality loss with SNR. A practical example was introduced to validate the proposed method.
Tony Redmond - One of the best experts on this subject based on the ideXlab platform.
-
Optimising the glaucoma Signal/Noise Ratio by mapping changes in spatial summation with area-modulated perimetric stimuli.
Scientific reports, 2018Co-Authors: Lindsay Rountree, Pádraig J. Mulholland, Roger S. Anderson, David F. Garway-heath, James Edwards Morgan, Tony RedmondAbstract:Identification of glaucomatous damage and progression by perimetry are limited by measurement and response variability. This study tested the hypothesis that the glaucoma damage Signal/Noise Ratio is greater with stimuli varying in area, either solely, or simultaneously with contrast, than with conventional stimuli varying in contrast only (Goldmann III, GIII). Thirty glaucoma patients and 20 age-similar healthy controls were tested with the Method of Constant Stimuli (MOCS). One stimulus modulated in area (A), one modulated in contrast within Ricco’s area (CR), one modulated in both area and contrast simultaneously (AC), and the reference stimulus was a GIII, modulating in contrast. Stimuli were presented on a common platform with a common scale (energy). A three-stage protocol minimised artefactual MOCS slope bias that can occur due to differences in psychometric function sampling between conditions. Threshold difference from age-matched normal (total deviation), response variability, and Signal/Noise Ratio were compared between stimuli. Total deviation was greater with, and response variability less dependent on defect depth with A, AC, and CR stimuli, compared with GIII. Both A and AC stimuli showed a significantly greater Signal/Noise Ratio than the GIII, indicating that area-modulated stimuli offer benefits over the GIII for identifying early glaucoma and measuring progression.
Xue Min-biao - One of the best experts on this subject based on the ideXlab platform.
-
Cooperative Spectrum Sensing Data Fusion Method Based on Signal Noise Ratio Soft-Information
Signal Processing, 2011Co-Authors: Xue Min-biaoAbstract:Aim to the problem that the Signal Noise Ratio(SNR) of each user is assumed to nearly the same,so that the cooperative performance can not be improved remarkable in the larger difference of SNR environments,based on SNR information,a novel cooperative spectrum sensing scheme for OFDM system is proposed.By using the characteristics of cyclic prefix of OFDM Signal,the novel blind SNR estimation is proposed without any information of modulation or synchronization for the cognitive radio system.Moreover, by using the characteristics of detection probability curve which is close to the linear between -13dB and -5dB,and according to the estimated SNR,the detection probability curve can be quantized into the soft-information as decision believe degree information in order to attain more reasonable weight in fusion scheme.Computer simulation shows that the proposed scheme can utilize the SNR information effectively. And comparing with the conventional scheme,the performance of proposed scheme is better in various situations.Especially in the larger difference of SNR environments,the performance of proposed scheme is closer to data decision scheme.
Lindsay Rountree - One of the best experts on this subject based on the ideXlab platform.
-
Optimising the glaucoma Signal/Noise Ratio by mapping changes in spatial summation with area-modulated perimetric stimuli.
Scientific reports, 2018Co-Authors: Lindsay Rountree, Pádraig J. Mulholland, Roger S. Anderson, David F. Garway-heath, James Edwards Morgan, Tony RedmondAbstract:Identification of glaucomatous damage and progression by perimetry are limited by measurement and response variability. This study tested the hypothesis that the glaucoma damage Signal/Noise Ratio is greater with stimuli varying in area, either solely, or simultaneously with contrast, than with conventional stimuli varying in contrast only (Goldmann III, GIII). Thirty glaucoma patients and 20 age-similar healthy controls were tested with the Method of Constant Stimuli (MOCS). One stimulus modulated in area (A), one modulated in contrast within Ricco’s area (CR), one modulated in both area and contrast simultaneously (AC), and the reference stimulus was a GIII, modulating in contrast. Stimuli were presented on a common platform with a common scale (energy). A three-stage protocol minimised artefactual MOCS slope bias that can occur due to differences in psychometric function sampling between conditions. Threshold difference from age-matched normal (total deviation), response variability, and Signal/Noise Ratio were compared between stimuli. Total deviation was greater with, and response variability less dependent on defect depth with A, AC, and CR stimuli, compared with GIII. Both A and AC stimuli showed a significantly greater Signal/Noise Ratio than the GIII, indicating that area-modulated stimuli offer benefits over the GIII for identifying early glaucoma and measuring progression.
David F. Garway-heath - One of the best experts on this subject based on the ideXlab platform.
-
Optimising the glaucoma Signal/Noise Ratio by mapping changes in spatial summation with area-modulated perimetric stimuli.
Scientific reports, 2018Co-Authors: Lindsay Rountree, Pádraig J. Mulholland, Roger S. Anderson, David F. Garway-heath, James Edwards Morgan, Tony RedmondAbstract:Identification of glaucomatous damage and progression by perimetry are limited by measurement and response variability. This study tested the hypothesis that the glaucoma damage Signal/Noise Ratio is greater with stimuli varying in area, either solely, or simultaneously with contrast, than with conventional stimuli varying in contrast only (Goldmann III, GIII). Thirty glaucoma patients and 20 age-similar healthy controls were tested with the Method of Constant Stimuli (MOCS). One stimulus modulated in area (A), one modulated in contrast within Ricco’s area (CR), one modulated in both area and contrast simultaneously (AC), and the reference stimulus was a GIII, modulating in contrast. Stimuli were presented on a common platform with a common scale (energy). A three-stage protocol minimised artefactual MOCS slope bias that can occur due to differences in psychometric function sampling between conditions. Threshold difference from age-matched normal (total deviation), response variability, and Signal/Noise Ratio were compared between stimuli. Total deviation was greater with, and response variability less dependent on defect depth with A, AC, and CR stimuli, compared with GIII. Both A and AC stimuli showed a significantly greater Signal/Noise Ratio than the GIII, indicating that area-modulated stimuli offer benefits over the GIII for identifying early glaucoma and measuring progression.
