Due to high competition of the agriculture machines sector, the auto parts suppliers are investing in research to promote the development and reduce the costs of the products, passing these results to their clients wh...Due to high competition of the agriculture machines sector, the auto parts suppliers are investing in research to promote the development and reduce the costs of the products, passing these results to their clients who are the automakers. It was identified the need to redesign the regulation sieve system harvester, which is a compound assembly in the harvester＇s grain cleaning system, with the objective to reduce the costs and improve the ergonomic aspect, keeping the same efficiency from the original project. The improvement was developed by studying the original design and identifying possible project fails, such as components and manufacturing process which could be eliminated. For this, it was needed to do a research about rules and project considerations that must be applied in the products development and ergonomic too, specifically about geometric forms and anthropometric measures. From the redesign of this system, it is verified that it is possible by a study to identify possible improvements, and to develop a new system by a simple project, improving the ergonomic, reducing the cost and keeping the same efficacy from the original project.展开更多
Intravascular ultrasound( IVUS) is an important imaging technique that is used to study vascular wall architecture for diagnosis and assessment of the vascular diseases. Segmentation of lumen and media-adventitia boun...Intravascular ultrasound( IVUS) is an important imaging technique that is used to study vascular wall architecture for diagnosis and assessment of the vascular diseases. Segmentation of lumen and media-adventitia boundaries from IVUS images is a basic and necessary step for quantitative assessment of the vascular walls.Due to ultrasound speckles, artifacts and individual differences,automated segmentation of IVUS images represents a challenging task. In this paper,a random walk based method is proposed for fully automated segmentation of IVUS images. Robust and accurate determination of the seed points for different regions is the key to successful use of the random walk algorithm in segmentation of IVUS images and is the focus of the present work. Performance of the proposed algorithm was evaluated over an image database with 900 IVUS image frames of nine patient cases. The preliminary experimental results show the potential of the proposed IVUS image segmentation approach.展开更多
Objective： To evaluate the clinical effects of onepassage, double-passage and circular canalicular intubations in repairing lacerations of canaliculus. Methods： Atotal of 109 eyes in 109 cases ofcanalicular lacerat...Objective： To evaluate the clinical effects of onepassage, double-passage and circular canalicular intubations in repairing lacerations of canaliculus. Methods： Atotal of 109 eyes in 109 cases ofcanalicular laceration were repaired with three types of silicone intubations, among which 23 with one-passage canalicular intubation, 51 with double-passage canalicular intubation, and 35 with circular canalicular intubation. The average follow-up period was 12-15 months. Results： The wound/junction of the lacrimal canaliculi was ruptured in 5 cases （9.80%） of the double-passage group, 3 cases （8.57%） of the circular group, and 8 cases （34.78%） of the one-passage group. The rupture incidence of the one-passage group was significantly higher than that of the other two groups （ χ^2=9.416, P〈0.01）. During the inmbation, canaliculitis was observed in 12 cases （23.53%） of the double-passage group, while only 3 cases （8.57%） in the circular group and 8 cases （34.78%） in the one-passage group. The circular group had significantly lower incidence of canaliculitis than the other two groups （ χ^2=6.095, P〈0.05）. After extubation 6 months after laceration repair, the lacrimal passage remained patent with canalicular irrigation in 46 cases （90.20%） in the double-passage group, 30 cases （85.71%） in the circular group and 15 cases （65.22%） in the one-passage group. Six months after surgery, the canalicular patency in the one-passage group was significantly lower than that of the other two groups （ χ^2=7.390, P〈0.05）. Conclusions： Circular canalicular intubation is more stable and has less surgical complications than the doublepassage and one-passage canalicular intubations. It is also more effective clinically 12-15 months after laceration surgery.展开更多
文摘Due to high competition of the agriculture machines sector, the auto parts suppliers are investing in research to promote the development and reduce the costs of the products, passing these results to their clients who are the automakers. It was identified the need to redesign the regulation sieve system harvester, which is a compound assembly in the harvester＇s grain cleaning system, with the objective to reduce the costs and improve the ergonomic aspect, keeping the same efficiency from the original project. The improvement was developed by studying the original design and identifying possible project fails, such as components and manufacturing process which could be eliminated. For this, it was needed to do a research about rules and project considerations that must be applied in the products development and ergonomic too, specifically about geometric forms and anthropometric measures. From the redesign of this system, it is verified that it is possible by a study to identify possible improvements, and to develop a new system by a simple project, improving the ergonomic, reducing the cost and keeping the same efficacy from the original project.
基金Innovation Program of Shanghai Municipal Education Commission,China(No.13YZ136)National Science&Technology Support Program during the 12th Five-Year Plan Period of China(No.2012BAI13B02)
文摘Intravascular ultrasound( IVUS) is an important imaging technique that is used to study vascular wall architecture for diagnosis and assessment of the vascular diseases. Segmentation of lumen and media-adventitia boundaries from IVUS images is a basic and necessary step for quantitative assessment of the vascular walls.Due to ultrasound speckles, artifacts and individual differences,automated segmentation of IVUS images represents a challenging task. In this paper,a random walk based method is proposed for fully automated segmentation of IVUS images. Robust and accurate determination of the seed points for different regions is the key to successful use of the random walk algorithm in segmentation of IVUS images and is the focus of the present work. Performance of the proposed algorithm was evaluated over an image database with 900 IVUS image frames of nine patient cases. The preliminary experimental results show the potential of the proposed IVUS image segmentation approach.
文摘Objective： To evaluate the clinical effects of onepassage, double-passage and circular canalicular intubations in repairing lacerations of canaliculus. Methods： Atotal of 109 eyes in 109 cases ofcanalicular laceration were repaired with three types of silicone intubations, among which 23 with one-passage canalicular intubation, 51 with double-passage canalicular intubation, and 35 with circular canalicular intubation. The average follow-up period was 12-15 months. Results： The wound/junction of the lacrimal canaliculi was ruptured in 5 cases （9.80%） of the double-passage group, 3 cases （8.57%） of the circular group, and 8 cases （34.78%） of the one-passage group. The rupture incidence of the one-passage group was significantly higher than that of the other two groups （ χ^2=9.416, P〈0.01）. During the inmbation, canaliculitis was observed in 12 cases （23.53%） of the double-passage group, while only 3 cases （8.57%） in the circular group and 8 cases （34.78%） in the one-passage group. The circular group had significantly lower incidence of canaliculitis than the other two groups （ χ^2=6.095, P〈0.05）. After extubation 6 months after laceration repair, the lacrimal passage remained patent with canalicular irrigation in 46 cases （90.20%） in the double-passage group, 30 cases （85.71%） in the circular group and 15 cases （65.22%） in the one-passage group. Six months after surgery, the canalicular patency in the one-passage group was significantly lower than that of the other two groups （ χ^2=7.390, P〈0.05）. Conclusions： Circular canalicular intubation is more stable and has less surgical complications than the doublepassage and one-passage canalicular intubations. It is also more effective clinically 12-15 months after laceration surgery.
