基于SNMP的公立医院固定资产管理系统设计

公立医院为了对固定资产进行合理的管理均采用传统固定资产管理系统,此系统对于系统通信节点的管理能力较差,导致系统运行时间过长.因此,设计基于SNMP的公立医院固定资产管理系统.根据SNMP协议要求设定系统硬件结构,设计系统芯片电路,实现主动芯片性能.以SNMP协议为基础划分系统软件层级,构建系统通信模型.采用贝叶斯数据分类法,设定固定资产使用信息管理.将软硬件结合,完成基于SNMP的公立医院固定资产管理系统设计.构建系统测试,与传统系统对比实验,结果表明,此系统的使用效果优于传统系统,可有效提升公立医院固定资产管理能力.     

基于遗传算法的软硬件划分方法

针对SOC软硬件协同设计中的软硬件划分问题,首先构建了软硬件划分的系统模型,讨论了影响SOC性能的价格、执行时间、功耗、面积等因素及其相互关系。在此基础上,提出了一个旨在实现最优性价比的目标函数,并结合软硬件划分问题自身的特点对传统遗传算法的遗传操作进行了改进,在Matlab中进行了软硬件划分方法的仿真,仿真实验获得的结果有力地证明了算法的稳定性和有效性。同时,该算法在MPEG-2视频解码芯片设计中得到了实际应用,芯片设计的结果良好地反映了设计目标,证明了算法的实用性。     

基于模板的SoC结构自动划分方法

针对SoC芯片设计中的系统划分问题,提出一种面向应用的系统结构自动划分方法--基于模板的系统划分方法,并开发了系统划分工具--TBPS.基于模板的系统划分方法通过提取应用描述中的相似结构,并使用相似结构划分系统,最终得到一个尽量复用的系统结构.系统的相似结构划分采用遗传算法实现最优覆盖的搜索,并使用贪婪算法实现资源配置和任务调度.与已有的在系统划分中事先设定目标结构方法不同,文中方法可以根据应用的特点自动生成划分的结构.采用该方法及TBPS实现了应用描述到系统结构的自动划分.实验结果表明了TBPS对数据处理为主的应用划分的有效性.     

基于TMS320F2812的高精度数据采集及FFT实现

为了实现高精度同步数据采集,设计了一种基于TMS320F2812 DSP芯片与AD转换芯片AD7656构成的数据采集系统来进行数据采集,并对采样结果进行了FFT变换。重点介绍了系统硬件电路设计及FFT的实现。实验结果表明,系统能够高精度、高速度地进行A／D数据采集且FFT算法具有较高的效率。     

基于模糊聚类的线上线下教学资源整合系统设计

为了提高线上线下教学资源整合效果，设计基于模糊聚类的线上线下教学资源整合系统。系统硬件部分进行了中央控制器和信息处理芯片设计。系统软件设计主要包括教学资源交换模块、数据库与资源整合计算。利用模糊聚类算法计算数据相异度，根据数据间相异度构建资源整合函数。系统测试结果表明，设计的系统整合线上线下教学资源后，信息冗余较低。     

一种新的嵌入式MPEG-4 DVR系统设计

目前,视频监控已步入了全数字化的多媒体网络时代,在这一开发背景下,文章详细介绍了基于VW2010编解码芯片、FPGA和嵌入式CPU设计的嵌入式MPEG-4 DVR监控系统的设计方式,并在此基础上进一步介绍了VW2010芯片的应用.     

基于物联网的智能家居安全监控系统设计

随着人们生活水平的不断提高,针对原有智能家居安全监控系统智能门禁误报率过高的问题,设计基于物联网的智能家居安全监控系统。采用多端口终端作为智能家居安全监控终端,采用嵌入式控制器与嵌入式芯片完成中央控制器与总线的设计,利用时钟芯片与语音控制器实现系统的人机交互;基于硬件设计,进行系统软件设计,采用传感器进行监控信息采集,通过数据分类与归一化方程完成对信息的预处理,通过对安全监控流程进行设定完成安全监控过程。结合系统硬件设计与软件设计,完成基于物联网的智能家居安全监控系统设计。构建对比实验,与原有系统相比,此系统的门禁效果与人机交互性能更佳。门禁误报率较原有系统低4.5%~6.25%。由此可知,此系统更优越。     

基于DM642的PCI总线接口技术实现

针对目前红外图像处理对实时性要求的不断提高,本文采用TI公司的高性能数字多媒体处理芯片TMS320DM642为核心处理器,设计了基于PCI总线的图像数据采集系统,并介绍了其设备驱动和应用程序的设计,实验结果标明,该系统能够高速实时地实现红外图像信号的采集与传输。     

基于数据资源整合的综合监控系统集成优化方案浅谈

本文通过分析当前国内综合监控系统设计方案在数据资源整合方面的局限性,从数据资源整合角度提出的一种优化的系统集成方案,并就系统构成设计、网络设计、数据库、接口设计及软件设计等方面优化进行阐述,供综合监控系统设计参考。     

无线传输系统中nRF2401芯片数据丢失问题的研究

针对近距离无线传输系统中nRF2401芯片在实际应用中存在的数据丢失问题,提出一种对通信协议加以扩展的解决办法,并在用单片机与该芯片设计的实验电路上给予证明,给出了程序开发流程及硬件接口电路。实验结果分析表明,此方法可以有效解决数据丢失的问题,实现可靠的无线数据传输。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate