【摘 要】
：
BACKGROUND Duodenal duplications are rare congenital anomalies of the gastrointestinal tract.As the periampullary variant is much rarer,literature is scant and only few authors have reported their experience in diagnosis and treatment,particularly with op
【机 构】
：
DepartmentofPediatricSurgery,DepartmentofDigestiveEndoscopy,DepartmentofPediatricRadiology
【出 处】
：
世界胃肠内镜杂志:英文版(电子版)
论文部分内容阅读
BACKGROUND Duodenal duplications are rare congenital anomalies of the gastrointestinal tract.As the periampullary variant is much rarer,literature is scant and only few authors have reported their experience in diagnosis and treatment,particularly with op
其他文献
针对嫦娥五号探测器采样区视觉信息支持的需求和研制过程中的工程约束,提出了一种采样区快速视觉测量技术,研究内容包括时空受限条件下的相机标定、适应月面弱纹理的密集匹配以及AIT(总装、集成及测试)场景下的测量精度地面验证。最终在轨实现了1s内对采样区地形的快速三维重建,并对采样区景物完成了测量,证明了该视觉测量技术的有效性。
嫦娥五号探测器月面采样封装任务需利用采样机械臂及其末端执行机构夹持样品容器,为克服非结构化月面环境对机械臂控制造成的不可知影响,确保精确夹持样品容器,提出并设计了一种视觉伺服样品容器夹持的控制方法和系统。系统通过固定安装相机和"眼在手"相机协同获取机械臂末端执行机构以及样品容器特征,采用扩展卡尔曼滤波算法对机械臂末端执行机构位姿的控制参数进行估计,消除控制位姿的轨迹抖动,实现了对样品容器的精确夹持
BACKGROUND Bowel perforation from biliary stent migration is a serious potential complication of biliary stents,but fortunately has an incidence of less than 1%.CASE SUMMARY We report a case of a 54-year-old Caucasian woman with a history of Human Immunod
嫦娥五号探测器于2011年1月开始研制,历时十年。2020年11月24日,探测器在海南文昌成功发射;12月1日,着陆上升组合体在月球正面预定区域着陆;在月面工作了2天,分别通过钻取和表取两种采样方式获得了月球样品,并完成了就位科学探测;12月3日,上升器以着陆器为平台,零窗口起飞上升进入预定环月轨道;12月6日,轨返组合体与上升器完成了月球轨道交会对接与样品转移;12月13日,轨返组合体完成月地转
Biliary stenosis may represent a diagnostic and therapeutic challenge resulting in a delay in diagnosis and initiation of therapy due to the frequent difficulty in distinguishing a benign from a malignant stricture.In such cases,the diagnostic flowchart i
Opie’s“pancreatic duct obstruction”and“common channel”theories are generally accepted as explanations of the mechanisms involved in gallstone acute pancreatitis(AP).Common channel elucidates the mechanism of necrotizing pancreatitis due to gallstones.For
对嫦娥五号返回器再入飞行数据进行了弹道重建与气动力参数辨识。采用输出误差法辨识传感器误差及状态量初值,完成弹道重建。对重建弹道进行风修正,并获得修正后的攻角和侧滑角。基于修正后的弹道数据,采用线性回归法完成气动力参数辨识。与外测数据对比分析可知,弹道重建结果精度较高。与地面设计数据对比分析可知,气动力数据辨识结果与设计值偏差在合理范围内,从而验证了地面设计数据的可信度。
Pancreatic cancer produces disabling abdominal pain,and the pain medical management for pancreatic cancer is often challenging because it mainly relies on the use of narcotics(major opioids).However,opioids often provide suboptimal pain relief,and the use
针对探月三期嫦娥五号返回器理论落区范围大造成的回收搜索困难问题,建立返回器回收着陆段高保真动力学模型并结合空投试验进行了模型验证,利用该模型对嫦娥五号回收任务中返回器开伞后飞行轨迹的偏差特性进行了分析,结果表明,利用该模型可以实现对返回器飞行轨迹偏差范围的精准计算,有助于缩小返回器搜救范围,缩短搜救时间。
BACKGROUND In recent years,with the growing availability of image-enhanced gastrointestinal endoscopy,gastroenterologists have contributed to the early detection of pharyngeal squamous cell carcinomas(SCC).AIM To clarify the clinical characteristics of ph