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1.
信息物理融合系统控制软件的统计模型检验   总被引:1,自引:1,他引:0  
信息物理融合系统常采用嵌入式实时多任务系统作为其控制软件,这类软件的并发和非确定性给验证带来了困难.提出了一种利用统计模型检验技术分析多任务系统的功能正确性的方法.该方法构造的时间自动机模型以模块化的方式描述了实时多任务系统中的主要成分,包括实时操作系统、周期性任务、偶发任务、共享资源以及物理环境,能够展现多任务系统的细粒度的运行过程及其对物理环境的实时响应.应用该方法分析了玉兔号月球车控制软件的一个早期版本,发现了系统运行中出现的一个特殊错误,识别了实际系统出现错误的条件,再现了出现错误的场景.  相似文献
2.
The spread of mobile media devices (MMDs), such as smartphones and tablet computers, has been markedly rapid around the world in recent years. The diffusion of mobile media technology has turned some early adopters into “power users,” using MMD more innovatively, efficiently and thoroughly than others. Going beyond the research of innovative users and heavy users, this study proposes the concept of power users by investigating the interactions between the power use of MMD and personality attributes, online activities as well as traditional media use. The findings showed that personality attributes were strong predictors for power use, which was also partially predicated by media multitasking and traditional media use. Research in this stream should assist in understanding the diffusion of mobile media technology and its impact on human interaction.  相似文献
3.
为提高EMS/Agent集中式管理方法中Agent的并发处理性能及响应时间,对网元Agent中的多任务并发调度机制进行研究,提出采用轻量级Job取代任务作为最小调度单位,结合多线程异步并发机制构建网元Agent消息处理调度框架。该技术已应用于中兴通讯的光传输设备中,有效提高了系统的并行处理能力,并改善了交互响应时间。  相似文献
4.
提出了一种采用软件扩展中断技术的简易实时多任务调度程序设计方法,详细介绍了1个调度程序和4个系统调用即软中断触发调用、硬中断进入调度、硬中断退出调用及陷阱调用的实现,并给出了相应的程序框图。该软中断单片机抢占式实时多任务处理方法具有核心程序短、效率高、使用简单等优点,适合于单片机级的应用。  相似文献
5.
The enterprise modeling field aims at representing organizations from several, inter-related perspectives. A number of enterprise modeling frameworks have been developed providing models, methods and tools that enable to communicate the structure and processes of organizations. These frameworks have been used both for systems development and organizational analysis ends, where the latter mainly focuses process (re)design efforts. We argue that enterprise modeling frameworks can be used for other kinds of organizational analysis. In particular, they can be used to capture and model work practices, human multitasking at work, and to compare models describing pre-defined behavior with actual execution.  相似文献
6.
王栋  胡君 《计算机工程》2010,36(9):10-13
设计基于Windows系统的精确定时与多任务协调处理相结合的实时仿真测试系统。采用FPGA控制的PCI设备定时触发计算机外部中断的方法实现系统精确定时。按照由高到低的执行优先级,重新排列指令的发出、解析、存储等任务的执行顺序,避免出现定时中断无法响应的情况。实验结果证明,系统定时精度可达0.1 ms,测试任务均能按时执行、及时解析并正确储存,满足空间光学遥感器控制系统的实时仿真测试要求。  相似文献
7.
分析基于正交频分复用调制技术的超宽带无线通信系统中物理层受到的模拟前端非理想因素,提出一种联合估计算法。该联合估计算法能在存在频率相关性I/Q失配的情形下准确获得载波频率偏差和采样频率偏差的估计,并获得频率相关性I/Q失配和信道冲击响应的联合估计信息。系统仿真证明,该计算法能较好地适用于多载波正交频分复用超宽带系统。  相似文献
8.
随着SoC设计规模的增大和设计复杂度的提高,对芯片设计深层次验证的必要性、工作量和难度也变得越来越大。在此背景卞分析了SoC软硬件协同验证的原理及实现技术,研究了μC/OS—II在基于ARM7TDMI内核的SoC上的移植工作,提出了使用μC/OS-II及其上层应用程序验证SoC芯片硬件可用性和可操作性的方法。  相似文献
9.
College students use information and communication technologies at much higher levels and in different ways than prior generations. They are also more likely to multitask while using information and communication technologies. However, few studies have examined the impacts of multitasking on educational outcomes among students. This study fills a gap in this area by utilizing a large-sample web-based survey of college student technology usage to examine how instant messaging and multitasking affect perceived educational outcomes. Since multitasking can impede the learning process through a form of information overload, we explore possible predictors of academic impairment due to multitasking. Results of this study suggest that college students use instant messaging at high levels, they multitask while using instant messaging, and over half report that instant messaging has had a detrimental effect on their schoolwork. Higher levels of instant messaging and specific types of multitasking activities are associated with students reporting not getting schoolwork done due to instant messaging. We discuss implications of these findings for researchers studying the social impacts of technology and those in higher education administration.  相似文献
10.
Social network sites (SNS) have become an important social milieu that enables interpersonal communication by allowing users to share and create information. This study explored the associations between SNS use and personality traits, i.e., need for cognition (NFC) and information and communication technology (ICT) innovativeness. The findings showed that the SNS use had a negative association with NFC and a positive association with ICT innovativeness. Specifically, people who were more likely to engage in effortful thinking used SNS less often, and those who were high in ICT innovativeness used SNS more often. Meanwhile, those who spent more time on SNS were more likely to be multitaskers. Additionally, those who spent more time on SNS also spent more Internet time in general, more online time for study/work and more time in surfing the Web with no specific purpose. This study, which could be a first look at the link between social networking and our thinking, provides evidence for the associations between social media use and personality traits.  相似文献
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