医院住院信息管理系统的设计与实现

随着网络技术和IT技术的发展和进步,计算机应用已经涉及到人们生活的各个方面。医院住院信息管理系统是实现一个Web形式的B/S架构的数据信息收集、处理和查询的完整的信息处理方案。该系统集合了患者管理,床位管理,医生管理以及病房管理的综合性信息医院管理系统软件。运用软件工程的设计思想对网站进行了需求分析和逐步设计。     

基于变周期技术的自适应数据采集算法

在数据采集系统中,按需采集是平衡数据数量、提高数据质量的有效手段。本文所提出的自适应数据采集算法是基于有限采样点的一元线性回归拟合,通过实时地对采集到的数据进行分析,不断修正采样周期,使得采样周期能够快速、准确地适应被测对象的动态变化。MATLAB软件仿真表明,本方法对于被测量加速变化具有较强的动态捕捉能力,能够在降低平均采样频率的前提下减小采样失真度,且与同类方法相比失真度低,稳定性高,是测控系统中实时数据采集的一种较好的代替方案。     

高可扩展可容错的无网格/粒子程序petaPar及其测试

petaPar 粒子模拟程序面向千万亿次级计算,在统一框架下实现两种广受关注的粒子模拟算法：光滑粒子流体动力学（Smoothed Particle Hydrodynamics,SPH）和物质点法（Material Point Method,MPM)。代码支持多种材料模型、强度模型和失效模型,适合模拟大变形、高应变率和流固耦合问题。支持纯 MPI 和 MPI+X 混合两种并行模型。系统具有可容错性,支持无人值守变进程重启。在Titan 上测试表明,petaPar 可线性扩展到 26 万 CPU 核,SPH 和 MPM 算法并行效率相对 8 192 核分别为 87% 和 90%。     

手机位置信息的保护和利用

高速发展的智能手机和无线网络将互联网推向了移动互联网的世界,众多手机操作系统和应用软件开发公司为了获取更多的资源,肆无忌惮地对手机用户的位置信息进行收集,广大用户如何对手机位置信息进行保护,以及如何利用好这些位置信息,本文中将进行探讨。     

浅谈计算机信息保密安全技术

伴随着新媒体广播电视行业信息化建设的加快,对计算机的使用也越来越广泛,基于网络连接的计算机信息安全问题也日益突出,信息安全保密显得尤为重要.针对计算机信息的安全威胁,怎样才能确保信息的安全性,本文通过阐述信息安全保密的概念、分析信息安全的现状及威胁因素,最终提出信息保密安全技术的具体方法.     

A grid-based clustering algorithm for wild bird distribution

Advanced satellite tracking technologies provide biologists with long-term location sequence data to understand movement of wild birds then to find explicit correlation between dynamics of migratory birds and the spread of avian influenza. In this paper, we propose a hierarchical clustering algorithm based on a recursive grid partition and kernel density estimation (KDE) to hierarchically identify wild bird habitats with different densities. We hierarchically cluster the GPS data by taking into account the following observations: 1) the habitat variation on a variety of geospatial scales; 2) the spatial variation of the activity patterns of birds in different stages of the migration cycle. In addition, we measure the site fidelity of wild birds based on clustering. To assess effectiveness, we have evaluated our system using a large-scale GPS dataset collected from 59 birds over three years. As a result, our approach can identify the hierarchical habitats and distribution of wild birds more efficiently than several commonly used algorithms such as DBSCAN and DENCLUE.     

SuperVlan技术的网络组网方法

本文提出一种利用超级虚拟局域网(SuperVlan)技术的组网方法,在接入交换机上的每个端口分配一个VLAN(即每个用户分配一个VLAN),使得入网用户之间二层通讯相互隔离,达到有效的解决网络环路、ARP攻击、DHCP欺骗等问题造成的网络故障。     

基于无线传感网的轻量级数字签名系统设计

为了确保传感器网络中传输数据的可靠性,本文设计了一个基于对称密码体制的数字签名系统。系统使用对称密码机制来提高效率,采用硬件加密设备保证共享密钥池的安全,通过使用特定的密钥生成算法解决对称密钥的分发问题。实验结果表明,系统能耗低、效率高,具有很强的实用性。     

某雷达航迹仿真系统设计和实现

本文主要介绍了一种雷达航迹仿真系统的设计和实现,并在此基础上提出了雷达航迹仿真的关键技术,在验证和测试雷达情报处理功能方面具有应用价值.     

Toward Better Understanding of Task Difficulty during Physicians’ Interaction with Electronic Health Record System (EHRs)

ABSTRACT

The goal of this study was to assess the relationship of task difficulty and mental effort with performance during physicians’ interaction with electronic health records (EHRs). A total of 38 physicians were asked to identify abnormal results and take follow-up action to “close the loop” on care delivery. Task difficulty was quantified via task-flow strategies and computer mouse-click patterns. Mental effort was quantified using eye movements based on changes in pupillary dilations (task evoked pupillary response or TEPR) and blink rate. Performance was quantified based on commission errors (error vs. no-error). Results indicated that physicians had different task-flow strategies; however, with improved awareness of the patient status, they exhibited an optimal task-flow strategy. Overall, performance was related to task-flow strategies, computer mouse-click patterns, and blink rate, indicating that physicians had lower task-difficulty and experienced lower mental effort with improved awareness of patient follow-up status. This is an important finding demonstrating that task-flows are a dominant predictor of physician performance when comparing between EHR designs. On the contrary, mouse-click patterns and blink rate are both useful predictors of physician performance when assessment was done within an EHR.