目的:膝关节外伤患者的X线投照中,无法移动不能向患侧倾斜而导致侧位不好拍摄,对髌骨、股骨下段及胫腓骨骨折的诊断造成极大的影响。方法:现使用GE Definium6000 DR X线光机下,有两种膝关节侧位的投照方法。结果:运用移动平板探测器和...目的:膝关节外伤患者的X线投照中,无法移动不能向患侧倾斜而导致侧位不好拍摄,对髌骨、股骨下段及胫腓骨骨折的诊断造成极大的影响。方法:现使用GE Definium6000 DR X线光机下,有两种膝关节侧位的投照方法。结果:运用移动平板探测器和立柱式平板探测器可使膝关节侧位成功率达100%。结论:利用移动式平板探测器比普通改变体位拍摄更有利于膝关节外伤病人的检查。展开更多
A new scan matching method for mobile robot localization is presented, which takes line segment as the feature and matches the real scans in the given reference map by relationships of the directional-defined line seg...A new scan matching method for mobile robot localization is presented, which takes line segment as the feature and matches the real scans in the given reference map by relationships of the directional-defined line segments. The alignment was done by hierarchically identifying the multiple relationships and the result was recorded in a correspondence matrix, where the best match is defined and selected for localization. It is indicated that the searching algorithm of the best match can find the ambiguities and get rid of them. This method with less computational cost works well in occluded environment, and can correct the error in pose estimation without the need for the estimation itself. The efficiency, accuracy and robustness of this method were verified by experiments of localization in an occluded environment and a long-distance indoor navigation.展开更多
The major purpose of this paper is to reduce the laser directional deviation of laser designator on a moving platform.A new method of inhibiting the laser beam positional error caused by platform movement and vibratio...The major purpose of this paper is to reduce the laser directional deviation of laser designator on a moving platform.A new method of inhibiting the laser beam positional error caused by platform movement and vibration is proposed.In this method,quadrant detector(QD)and fast steering mirror are combined to measure the angle between laser designator axis and the line-of-sight of the target,then a control signal composed with the angle errors is generated to aim the axis of the laser designator at the target steadily.This is a real time processing method and it is suitable for airborne laser-guided weapons with second-class guiding time.展开更多
The robot consists of a quadruped mechanism and two active dual-wheel casters possesses the advantages of wheeled and legged mechanism, and can quickly move on the relatively plane ground with the wheeled mechanism, a...The robot consists of a quadruped mechanism and two active dual-wheel casters possesses the advantages of wheeled and legged mechanism, and can quickly move on the relatively plane ground with the wheeled mechanism, and can walk on the extremely uneven terrain with the legged mechanism. The effectiveness of the motion design of the hybrid robot is iHustrated by simulation results.展开更多
文摘目的:膝关节外伤患者的X线投照中,无法移动不能向患侧倾斜而导致侧位不好拍摄,对髌骨、股骨下段及胫腓骨骨折的诊断造成极大的影响。方法:现使用GE Definium6000 DR X线光机下,有两种膝关节侧位的投照方法。结果:运用移动平板探测器和立柱式平板探测器可使膝关节侧位成功率达100%。结论:利用移动式平板探测器比普通改变体位拍摄更有利于膝关节外伤病人的检查。
基金Sponsored by the National High Technology Research and Development Program of China(Grant No.2006AA040203)The National Natural Science Foundation of China(Grant No.60475032 and 60775062)the Program for New Century Excellent Talents in University(Grant No.NCET-07-0538)
文摘A new scan matching method for mobile robot localization is presented, which takes line segment as the feature and matches the real scans in the given reference map by relationships of the directional-defined line segments. The alignment was done by hierarchically identifying the multiple relationships and the result was recorded in a correspondence matrix, where the best match is defined and selected for localization. It is indicated that the searching algorithm of the best match can find the ambiguities and get rid of them. This method with less computational cost works well in occluded environment, and can correct the error in pose estimation without the need for the estimation itself. The efficiency, accuracy and robustness of this method were verified by experiments of localization in an occluded environment and a long-distance indoor navigation.
基金Postdoctoral Science Foundation of China(0100W016309)
文摘The major purpose of this paper is to reduce the laser directional deviation of laser designator on a moving platform.A new method of inhibiting the laser beam positional error caused by platform movement and vibration is proposed.In this method,quadrant detector(QD)and fast steering mirror are combined to measure the angle between laser designator axis and the line-of-sight of the target,then a control signal composed with the angle errors is generated to aim the axis of the laser designator at the target steadily.This is a real time processing method and it is suitable for airborne laser-guided weapons with second-class guiding time.
基金Sponsored by Hi-Tech Research and Development Program of China(Grant No. 2001AA422380)
文摘The robot consists of a quadruped mechanism and two active dual-wheel casters possesses the advantages of wheeled and legged mechanism, and can quickly move on the relatively plane ground with the wheeled mechanism, and can walk on the extremely uneven terrain with the legged mechanism. The effectiveness of the motion design of the hybrid robot is iHustrated by simulation results.
