Monitoring high-dimensional multistage processes becomes crucial to ensure the quality of the final product in modern industry environments. Few statistical process monitoring(SPC) approaches for monitoring and contro...Monitoring high-dimensional multistage processes becomes crucial to ensure the quality of the final product in modern industry environments. Few statistical process monitoring(SPC) approaches for monitoring and controlling quality in highdimensional multistage processes are studied. We propose a deviance residual-based multivariate exponentially weighted moving average(MEWMA) control chart with a variable selection procedure. We demonstrate that it outperforms the existing multivariate SPC charts in terms of out-of-control average run length(ARL) for the detection of process mean shift.展开更多
A three-step synthesis strategy for the automatic synthesis of operating procedures in batch processoperations is presented in this paper.The first step is pre-operation which consists of a set of checks that mustbe c...A three-step synthesis strategy for the automatic synthesis of operating procedures in batch processoperations is presented in this paper.The first step is pre-operation which consists of a set of checks that mustbe considered before starting the basic process operation.The second step is operation which is described by a setof basic control instructions.The third step is post-operation described by a set of instructions that must becarried out when the basic process operation is terminated.The three-step synthesis method has been imple-mented as part of a prototype recipe management system.展开更多
Background: Evaluation of the pre-procedural process prior to endoscopic procedures has never been conducted. Methods: Prospective cross-sectional, multi-language survey was administered to outpatients undergoing endo...Background: Evaluation of the pre-procedural process prior to endoscopic procedures has never been conducted. Methods: Prospective cross-sectional, multi-language survey was administered to outpatients undergoing endoscopy at a large, diverse county hospital that examined patients’ pre-procedural preferences. Multivariate logistic regression was used to assess the relationship between patient preferences and several patient-related variables. Results: 128/156 outpatients completed the survey. The majority of respondents were female (53.1%), did not speak English (61.7%), were of Asian (39.1%) or Hispanic (29.7%) racial background, and had a mean age of 56.1 ± 15.7 years. Most patients underwent colonoscopy (48.4%) with 90.6% of patients knowing the indication for their procedure. While waiting for their endoscopic procedure, 42.2% of patients preferred waiting in a gurney while 28.1% preferred to wait in a chair. In terms of being comfortable wearing a hos- pital gown and sitting in a chair or gurney in the pre-procedure area, mean patient anxiety scores were 5.2 ± 3.3 and 6.1 ± 3.2, respectively (scale of 1 - 10). Race was associated with several pre-procedural patient preferences;Hispanics were less comfortable than Asians wearing a hospital gown while sitting in a chair with other patients prior to their procedure (OR = 0.3, CI 0.1 - 1.0) while Whites and African-Americans were less likely than Asians to prefer sitting in a chair as compared to a gurney before their procedure (OR = 0.09, CI 0.008 - 0.9 and OR = 0.07, CI 0.007 - 0.8, respectively). Patients who had undergone a prior endoscopic procedure were less comfortable wearing a hospital gown and sitting in a chair (OR = 0.3, CI 0.1 - 0.7) or gurney (OR = 0.4, CI 0.2 - 1.0) in the pre-procedure area. Conclusion: A patient’s race and having had a prior endoscopic procedure were the most powerful predictors on pre-procedure patient preferences while sex, type of endoscopic procedure and patient knowledge of the indication for their procedure were not. Our study highlights the importance of patient preferences and factors involved in the pre procedure process at a large, diverse county hospital.展开更多
In the analysis of high-rise building, traditional displacement-based plane elements are often used to get the in-plane internal forces of the shear walls by stress integration. Limited by the singular problem produce...In the analysis of high-rise building, traditional displacement-based plane elements are often used to get the in-plane internal forces of the shear walls by stress integration. Limited by the singular problem produced by wall holes and the loss of precision induced by using differential method to derive strains, the displacement-based elements cannot always present accuracy enough for design. In this paper, the hybrid post-processing procedure based on the Hellinger-Reissner variational principle is used for improving the stress precision of two quadrilateral plane elements. In order to find the best stress field, three different forms are assumed for the displacement-based plane elements and with drilling DOF. Numerical results show that by using the proposed method, the accuracy of stress solutions of these two displacement-based plane elements can be improved.展开更多
A new algorithm is proposed to determine the actual length and the number of the protruding fibres of yarn based on a combination of image acquisition technology. First, a yarn hairiness image is obtained by the serie...A new algorithm is proposed to determine the actual length and the number of the protruding fibres of yarn based on a combination of image acquisition technology. First, a yarn hairiness image is obtained by the series of image processing procedures that include grayscale transformation,skew correction,yarn binary image acquisition and yarn core binary image obtaining. Then,the hairiness is realized in single pixel width by the usage of thinning algorithm. Finally, a baseline of yarn core margin is obtained,and pixels that match 8-neighbor template correctly are found by row scanning in a certain area. From this,these pixels are judged and the real crossover points of yarn core margin and hairiness,i. e.,the starting points of hairiness,are gained. The real length of the protruding fibres is calculated by tracking hairiness from the starting point constantly.展开更多
基金supported by the Qatar National Research Fund(NPRP5-364-2-142NPRP7-1040-2-293)
文摘Monitoring high-dimensional multistage processes becomes crucial to ensure the quality of the final product in modern industry environments. Few statistical process monitoring(SPC) approaches for monitoring and controlling quality in highdimensional multistage processes are studied. We propose a deviance residual-based multivariate exponentially weighted moving average(MEWMA) control chart with a variable selection procedure. We demonstrate that it outperforms the existing multivariate SPC charts in terms of out-of-control average run length(ARL) for the detection of process mean shift.
文摘A three-step synthesis strategy for the automatic synthesis of operating procedures in batch processoperations is presented in this paper.The first step is pre-operation which consists of a set of checks that mustbe considered before starting the basic process operation.The second step is operation which is described by a setof basic control instructions.The third step is post-operation described by a set of instructions that must becarried out when the basic process operation is terminated.The three-step synthesis method has been imple-mented as part of a prototype recipe management system.
文摘Background: Evaluation of the pre-procedural process prior to endoscopic procedures has never been conducted. Methods: Prospective cross-sectional, multi-language survey was administered to outpatients undergoing endoscopy at a large, diverse county hospital that examined patients’ pre-procedural preferences. Multivariate logistic regression was used to assess the relationship between patient preferences and several patient-related variables. Results: 128/156 outpatients completed the survey. The majority of respondents were female (53.1%), did not speak English (61.7%), were of Asian (39.1%) or Hispanic (29.7%) racial background, and had a mean age of 56.1 ± 15.7 years. Most patients underwent colonoscopy (48.4%) with 90.6% of patients knowing the indication for their procedure. While waiting for their endoscopic procedure, 42.2% of patients preferred waiting in a gurney while 28.1% preferred to wait in a chair. In terms of being comfortable wearing a hos- pital gown and sitting in a chair or gurney in the pre-procedure area, mean patient anxiety scores were 5.2 ± 3.3 and 6.1 ± 3.2, respectively (scale of 1 - 10). Race was associated with several pre-procedural patient preferences;Hispanics were less comfortable than Asians wearing a hospital gown while sitting in a chair with other patients prior to their procedure (OR = 0.3, CI 0.1 - 1.0) while Whites and African-Americans were less likely than Asians to prefer sitting in a chair as compared to a gurney before their procedure (OR = 0.09, CI 0.008 - 0.9 and OR = 0.07, CI 0.007 - 0.8, respectively). Patients who had undergone a prior endoscopic procedure were less comfortable wearing a hospital gown and sitting in a chair (OR = 0.3, CI 0.1 - 0.7) or gurney (OR = 0.4, CI 0.2 - 1.0) in the pre-procedure area. Conclusion: A patient’s race and having had a prior endoscopic procedure were the most powerful predictors on pre-procedure patient preferences while sex, type of endoscopic procedure and patient knowledge of the indication for their procedure were not. Our study highlights the importance of patient preferences and factors involved in the pre procedure process at a large, diverse county hospital.
文摘In the analysis of high-rise building, traditional displacement-based plane elements are often used to get the in-plane internal forces of the shear walls by stress integration. Limited by the singular problem produced by wall holes and the loss of precision induced by using differential method to derive strains, the displacement-based elements cannot always present accuracy enough for design. In this paper, the hybrid post-processing procedure based on the Hellinger-Reissner variational principle is used for improving the stress precision of two quadrilateral plane elements. In order to find the best stress field, three different forms are assumed for the displacement-based plane elements and with drilling DOF. Numerical results show that by using the proposed method, the accuracy of stress solutions of these two displacement-based plane elements can be improved.
基金National Natural Science Foundation of China(No.61301276)Xi’an Polytechnic University Young Scholar Backbone Supporting Plan,ChinaDiscipline Construction Funds of Xi’an Polytechnic University,China(No.107090811)
文摘A new algorithm is proposed to determine the actual length and the number of the protruding fibres of yarn based on a combination of image acquisition technology. First, a yarn hairiness image is obtained by the series of image processing procedures that include grayscale transformation,skew correction,yarn binary image acquisition and yarn core binary image obtaining. Then,the hairiness is realized in single pixel width by the usage of thinning algorithm. Finally, a baseline of yarn core margin is obtained,and pixels that match 8-neighbor template correctly are found by row scanning in a certain area. From this,these pixels are judged and the real crossover points of yarn core margin and hairiness,i. e.,the starting points of hairiness,are gained. The real length of the protruding fibres is calculated by tracking hairiness from the starting point constantly.
