针对边缘计算中存在虚假欺骗、搭便车等不良行为导致资源浪费和卸载服务低效的问题,提出一种基于综合信任评价的任务卸载(Task Offloading scheme based on Comprehensive Trust Evaluation,TOCTE)策略.建立节点信任遗忘函数,以任务真...针对边缘计算中存在虚假欺骗、搭便车等不良行为导致资源浪费和卸载服务低效的问题,提出一种基于综合信任评价的任务卸载(Task Offloading scheme based on Comprehensive Trust Evaluation,TOCTE)策略.建立节点信任遗忘函数,以任务真实性和节点卸载协作行为特征为约束,构建节点间卸载请求和协作信任评价模型,识别并过滤网络中的虚假任务和不良协作节点.设计搜索发现概率优化粒子群算法,规避节点重复利用引起的节点过载,提高边缘计算任务卸载效率和资源有效利用.仿真实验表明,TOCTE策略模型真实任务执行成功率达到59.22%,资源损耗率最低达到6.35%,能有效抑制和过滤虚假任务,降低资源损耗.展开更多
Background Comparing with two dimensional （2D） imaging, both in diagnosis and treatment, three dimensional （3D） imaging has many advantages in clinical medicine. 3D reconstruction makes the target easier to identi...Background Comparing with two dimensional （2D） imaging, both in diagnosis and treatment, three dimensional （3D） imaging has many advantages in clinical medicine. 3D reconstruction makes the target easier to identify and reveals the volume and shape of the organ much better than 2D imaging. A 3D digitized visible model of the liver was built to provide anatomical structure for planing of hepatic operation and for realizing accurate simulation of the liver on the computer. Methods Transverse sections of abdomen were chosen from the Chinese Visible Human dataset. And Amira software was selected to segment and reconstruct the structures of the liver. The liver was reconstructed in three-dimensions with both surface and volume rendering reconstruction. Results Accurately segmented images of the main structures of the liver were completed. The reconstructed structures can be displayed singly, in small groups or as a whole and can be continuously rotated in 3D space at different velocities. Conclusions The reconstructed liver is realistic, which demonstrates the natural shape and exact position of liver structures, tt provides an accurate model for the automated segmentation algorithmic study and a digitized anatomical mode of viewing the liver.展开更多
文摘针对边缘计算中存在虚假欺骗、搭便车等不良行为导致资源浪费和卸载服务低效的问题,提出一种基于综合信任评价的任务卸载(Task Offloading scheme based on Comprehensive Trust Evaluation,TOCTE)策略.建立节点信任遗忘函数,以任务真实性和节点卸载协作行为特征为约束,构建节点间卸载请求和协作信任评价模型,识别并过滤网络中的虚假任务和不良协作节点.设计搜索发现概率优化粒子群算法,规避节点重复利用引起的节点过载,提高边缘计算任务卸载效率和资源有效利用.仿真实验表明,TOCTE策略模型真实任务执行成功率达到59.22%,资源损耗率最低达到6.35%,能有效抑制和过滤虚假任务,降低资源损耗.
文摘Background Comparing with two dimensional （2D） imaging, both in diagnosis and treatment, three dimensional （3D） imaging has many advantages in clinical medicine. 3D reconstruction makes the target easier to identify and reveals the volume and shape of the organ much better than 2D imaging. A 3D digitized visible model of the liver was built to provide anatomical structure for planing of hepatic operation and for realizing accurate simulation of the liver on the computer. Methods Transverse sections of abdomen were chosen from the Chinese Visible Human dataset. And Amira software was selected to segment and reconstruct the structures of the liver. The liver was reconstructed in three-dimensions with both surface and volume rendering reconstruction. Results Accurately segmented images of the main structures of the liver were completed. The reconstructed structures can be displayed singly, in small groups or as a whole and can be continuously rotated in 3D space at different velocities. Conclusions The reconstructed liver is realistic, which demonstrates the natural shape and exact position of liver structures, tt provides an accurate model for the automated segmentation algorithmic study and a digitized anatomical mode of viewing the liver.
