一、计算机局域网的定义和特性 局域网络(Local Area Network),简写成LAN)是将一个小区域内的各种通信设备互连在一起的通信网络。因它是一个通信网络,从协议层次的观点看,包含着下三层的功能。将连接到局域网络的数据通信设备加上高层...一、计算机局域网的定义和特性 局域网络(Local Area Network),简写成LAN)是将一个小区域内的各种通信设备互连在一起的通信网络。因它是一个通信网络,从协议层次的观点看,包含着下三层的功能。将连接到局域网络的数据通信设备加上高层协议和网络软件组成计算机网络。所以,我们称LAN为计算机局域网络。展开更多
随着互联网技术日新月异的发展,网络向各个领域不断延伸和渗透,移动护理应运而生。网络在临床中的应用,带来了临床护理的巨大变革,也带动了护理服务的高速发展。为了提升护理服务水平,达到患者满意、社会满意、医生护士满意的效果,我院...随着互联网技术日新月异的发展,网络向各个领域不断延伸和渗透,移动护理应运而生。网络在临床中的应用,带来了临床护理的巨大变革,也带动了护理服务的高速发展。为了提升护理服务水平,达到患者满意、社会满意、医生护士满意的效果,我院于2016年底引进移动护理系统,即:以现有的医学信息系统(hospital information system,HIS)[1]为支撑平台,以移动手持电脑设备(PDA)为硬件,配合无线局域网络技术,实现HIS系统在病房的扩展与延伸的床旁工作终端执行系统。展开更多
The local-world (LW) evolving network model shows a transition for the degree distribution between the exponential and power-law distributions, depending on the LW size. Cascading failures under intentional attacks in...The local-world (LW) evolving network model shows a transition for the degree distribution between the exponential and power-law distributions, depending on the LW size. Cascading failures under intentional attacks in LW network models with different LW sizes were investigated using the cascading failures load model. We found that the LW size has a significant impact on the network's robustness against deliberate attacks. It is much easier to trigger cascading failures in LW evolving networks with a larger LW size. Therefore, to avoid cascading failures in real networks with local preferential attachment such as the Internet, the World Trade Web and the multi-agent system, the LW size should be as small as possible.展开更多
To provide the right services or information to the right users, at the right time and in the right place in ubiquitous computing environment, an Indoor Ubiquitous Computing Environment based on Location-Awareness, IU...To provide the right services or information to the right users, at the right time and in the right place in ubiquitous computing environment, an Indoor Ubiquitous Computing Environment based on Location-Awareness, IUCELA, is presented in this paper. A general architecture of IUCELA is designed to connect multiple sensing devices with locationaware applications. Then the function of location-aware middleware which is the core componnet of the proposed architecture is elaborated. Finally an indoor forum is taken as an example scenario to demonstrate the security, usefulness, flexibiltity and robustness of IUCELA.展开更多
文摘一、计算机局域网的定义和特性 局域网络(Local Area Network),简写成LAN)是将一个小区域内的各种通信设备互连在一起的通信网络。因它是一个通信网络,从协议层次的观点看,包含着下三层的功能。将连接到局域网络的数据通信设备加上高层协议和网络软件组成计算机网络。所以,我们称LAN为计算机局域网络。
文摘随着互联网技术日新月异的发展,网络向各个领域不断延伸和渗透,移动护理应运而生。网络在临床中的应用,带来了临床护理的巨大变革,也带动了护理服务的高速发展。为了提升护理服务水平,达到患者满意、社会满意、医生护士满意的效果,我院于2016年底引进移动护理系统,即:以现有的医学信息系统(hospital information system,HIS)[1]为支撑平台,以移动手持电脑设备(PDA)为硬件,配合无线局域网络技术,实现HIS系统在病房的扩展与延伸的床旁工作终端执行系统。
基金the National Basic Research Program (973) of China (No. 2004CB217902)the National Natural Science Foundation of China (Nos. 60421002 and 60804045)the Postdoctoral Science Foundation of China (No. 20070421163)
文摘The local-world (LW) evolving network model shows a transition for the degree distribution between the exponential and power-law distributions, depending on the LW size. Cascading failures under intentional attacks in LW network models with different LW sizes were investigated using the cascading failures load model. We found that the LW size has a significant impact on the network's robustness against deliberate attacks. It is much easier to trigger cascading failures in LW evolving networks with a larger LW size. Therefore, to avoid cascading failures in real networks with local preferential attachment such as the Internet, the World Trade Web and the multi-agent system, the LW size should be as small as possible.
基金Supported by the Ministry of Educationin China (No.104086)
文摘To provide the right services or information to the right users, at the right time and in the right place in ubiquitous computing environment, an Indoor Ubiquitous Computing Environment based on Location-Awareness, IUCELA, is presented in this paper. A general architecture of IUCELA is designed to connect multiple sensing devices with locationaware applications. Then the function of location-aware middleware which is the core componnet of the proposed architecture is elaborated. Finally an indoor forum is taken as an example scenario to demonstrate the security, usefulness, flexibiltity and robustness of IUCELA.
