A technology for unintended lane departure warning was proposed. As crucial information, lane boundaries were detected based on principal component analysis of grayscale distribution in search bars of given number and...A technology for unintended lane departure warning was proposed. As crucial information, lane boundaries were detected based on principal component analysis of grayscale distribution in search bars of given number and then each search bar was tracked using Kalman filter between frames. The lane detection performance was evaluated and demonstrated in ways of receiver operating characteristic, dice similarity coefficient and real-time performance. For lane departure detection, a lane departure risk evaluation model based on lasting time and frequency was effectively executed on the ARM-based platform. Experimental results indicate that the algorithm generates satisfactory lane detection results under different traffic and lighting conditions, and the proposed warning mechanism sends effective warning signals, avoiding most false warning.展开更多
AIM:To examine the association between parity and gastric cancer (the cases are almost all premenopausal women) risk in a cohort of young parous women.METHODS:The study cohort consisted of all women with a record of a...AIM:To examine the association between parity and gastric cancer (the cases are almost all premenopausal women) risk in a cohort of young parous women.METHODS:The study cohort consisted of all women with a record of a first and singleton childbirth in the Birth Register between 1978 and 1987.We tracked each woman from the time of her first childbirth to December 31,2008.Their vital status was ascertained by linking records to the computerized mortality database.Cox proportional hazard regression models were used to estimate hazard ratios of death from gastric cancer associated with parity.RESULTS:There were 1090 gastric cancer deaths (85.87% of them were premenopausal) during 33686828 person-years of follow-up.The mortality rate of gastric cancer was 3.24 cases per 100000 person-years.A trend of increasing risk of gastric cancer was seen with increasing parity.The adjusted hazard ratio was 1.24 [confidence interval (95% CI):1.02-1.50] for women who had borne two to three children,and 1.32 (95% CI:1.01-1.72) for women with four or more births,when compared with women who had given birth to only one child.CONCLUSION:These results suggest that higher parity may increase the risk of death from gastric cancer among premenopausal women.展开更多
基金Project(51175159)supported by the National Natural Science Foundation of ChinaProject(2013WK3024)supported by the Science andTechnology Planning Program of Hunan Province,ChinaProject(CX2013B146)supported by the Hunan Provincial InnovationFoundation for Postgraduate,China
文摘A technology for unintended lane departure warning was proposed. As crucial information, lane boundaries were detected based on principal component analysis of grayscale distribution in search bars of given number and then each search bar was tracked using Kalman filter between frames. The lane detection performance was evaluated and demonstrated in ways of receiver operating characteristic, dice similarity coefficient and real-time performance. For lane departure detection, a lane departure risk evaluation model based on lasting time and frequency was effectively executed on the ARM-based platform. Experimental results indicate that the algorithm generates satisfactory lane detection results under different traffic and lighting conditions, and the proposed warning mechanism sends effective warning signals, avoiding most false warning.
基金Supported by A grant from the National Science Council,Executive Yuan,Taiwan,No.NSC-94-2314-B-037-056
文摘AIM:To examine the association between parity and gastric cancer (the cases are almost all premenopausal women) risk in a cohort of young parous women.METHODS:The study cohort consisted of all women with a record of a first and singleton childbirth in the Birth Register between 1978 and 1987.We tracked each woman from the time of her first childbirth to December 31,2008.Their vital status was ascertained by linking records to the computerized mortality database.Cox proportional hazard regression models were used to estimate hazard ratios of death from gastric cancer associated with parity.RESULTS:There were 1090 gastric cancer deaths (85.87% of them were premenopausal) during 33686828 person-years of follow-up.The mortality rate of gastric cancer was 3.24 cases per 100000 person-years.A trend of increasing risk of gastric cancer was seen with increasing parity.The adjusted hazard ratio was 1.24 [confidence interval (95% CI):1.02-1.50] for women who had borne two to three children,and 1.32 (95% CI:1.01-1.72) for women with four or more births,when compared with women who had given birth to only one child.CONCLUSION:These results suggest that higher parity may increase the risk of death from gastric cancer among premenopausal women.
