抨击荷载下高速艇双向加筋板船体结构分析的特点

采用直接算法对高速艇双向加筋板船体结构强度进行分析时,相对误差较大,精确度不足。针对上述问题,提出一种抨击荷载下高速艇双向加筋板船体结构特点分析方法。利用若干个纵、横加强筋构建一个高速艇双向加筋板船体结构,并通过有限元分析模型进行强度分析。对比结果表明:相对误差控制在10%以内,精确度提高了20%。     

A data model applied to the knowledge-based ICAS

Image-guided computer aided surgery system (ICAS) contributes to safeness and success of surgery operations by means of displaying anatomical structures and showing correlative information to surgeons in the process of operation. Based on analysis of requirements for ICAS, a new concept of clinical knowledge-based ICAS was proposed. Designing a reasonable data structure model is essential for realizing this new concept. The traditional data structure is limited in expressing and reusing the clinical knowledge such as locating an anatomical object, topological relations of anatomical objects and correlative clinical attributes. A data structure model called mixed adjacency lists by octree-path-chain (MALOC) was outlined, which can combine patient's images with clinical knowledge, as well as efficiently locate the instrument and search the objects' information. The efficiency of data structures was analyzed and experimental results were given in comparison to other traditional data structures. The result of the nasal surgery experiment proves that MALOC is a proper model for clinical knowledge-based ICAS that has advantages in not only locating the operative instrument precisely but also proving surgeons with real-time operation-correlative information. It is shown that the clinical knowledge-based ICAS with MALOC model has advantages in terms of safety and success of surgical operations, and help in accurately locating the operative instrument and providing operation-correlative knowledge and information to surgeons in the process of operations.     

2013中国汽车产业发展论坛

由第一财经日报和中国光大银行联合主办的"2013中国汽车产业发展论坛",以后合资时代中国汽车工业发展的新路径为主题,探讨未来中国汽车产业的发展方略。从1983年中国第一家汽车合资企业——北京吉普成立至今,中国汽车工业的合资之路已经走到了今天的第30个年头。如果说三十而立的话,那么以2013年作为分水     

铁路隧道施工方法技术改进

介绍隧道掘进施工，采用小导坑超前后全断面爆破跟进，在同一坑道内平导在前，全断面扩孔光爆围岩成拱形状好，再进行支护，衬砌，质量高，进度快，能确保衬砌内实外美、安装防水板切实起到防水作用，保证衬砌不渗不漏。     

试论道路机械化除雪的最佳方案与保障

冬季机械化除雪已成为北方城市道路除雪的主要手段,使得保障冬季降雪期间的道路畅通成为可能,但是,在对如何正确运用机械化除雪这一先进手段、何为机械化除雪最佳方案及靠什么来保障等问题的认识上仍存在一些误区。例如:有人认为冬季除雪最好的办法就是大量使用化学融雪剂,除雪     

新时期高校教师角色定位刍

在新时期下,传统的高校教师的角色定位已不能适应当前的实际要求,我们需树立师生平等、服务学生的意识,重新定位教师的身份和角色。     

顺层石质路堑安全施工技术

某线路分布有多处顺层石质路堑 ,分析顺层石质路堑施工技术特点。为确保施工安全 ,研究顺层石质路堑施工工艺 ,提出顺层石质路堑合理的爆破参数、防塌方技术措施和顺层石质路堑施工安全控制技术。     

高速铁路路基改良填料的工程特性试验研究

在于高速铁路对路基填料的严格要求,改良土成为高速铁路不可回避的问题。结合秦浓客运专线工程实际,进行了水泥土、石灰土、石灰粉煤灰土的物理力学特性试验,提出了满足高速铁路要求的各改良土的最佳配合比。