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《电子技术应用》2016,(2):9-13
机载显示器分辨率越来越高,显示内容越来越复杂,这对图形生成电路提出了更高的要求。提出了一种基于双处理器系统的图形生成电路实现方法,以两片DSP处理器作为绘图核心,配合FPGA和SDRAM帧存构建硬件平台,由主DSP进行绘图任务分配,并将任务分配结果通过Linkport口传递给从DSP,主从DSP根据任务分配结果并行完成图形生成算法运算,从DSP通过Linkport口向主DSP发送图形数据,主DSP将图形数据写入SDRAM帧存中,配合FPGA对SDRAM进行乒乓操作完成图形数据的实时生成与显示。实验结果表明,该方法与单处理器方案相比,在功耗仅增加15%的情况下图形生成效率可提高53%以上,生成一幅1 024×768的EFIS电子飞行显示系统画面帧率可达86 f/s。 相似文献
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飞机座舱图形生成系统的硬件加速设计 总被引:1,自引:0,他引:1
针对飞机座舱高分辨率图形实时生成与显示的应用需求,提出了一种适用于硬件实现的图形填充加速设计方法,在FPGA中设计了一种状态机对DSP置入的像素标记进行判断处理。采用SDRAM作为帧存,FPGA与DSP对SDRAM采取乒乓操作方式,实现了高分辨率图形数据的消隐与填充加速处理,填充算法无须将数据回写入SDRAM,实现了画面输出的零延时。试验结果表明,所提出的方法可以大幅减少图形绘图时间。 相似文献
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徐林 《自动化技术与应用》2009,28(11):38-42
本文提出了一种基于中心差分技术进行高度场镶嵌的系统方法,结合视点相关技术实现了多分辨率模型的生成,以适应实时应用的需要。此外,结合数据的预处理使本文的方法也能适用于真实采样数据的图形生成。本文的方法可用来实现对数据高度场进行实时图形显示的目的。与同类方法相比,本方法灵活性高,能够适于多种应用,其视觉质量好并且执行效率高。 相似文献
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基于FPGA和DSP的高分辨率图像采集系统 总被引:2,自引:0,他引:2
介绍了一种高分辨率图像数据采集系统的实现方案.该方案采用了现场可编程门阵列(FPGA)数字信号处理器(DSP)的体系结构,利用FPGA实现图像数据检测、采集、缓冲、预处理,并协调系统各部分的工作,利用DSP对图像数据进行JPEG压缩,通过PC104总线将压缩后的数据上传至主机.该方案中,由FPGA控制的高速大容量同步动态随机存储器(SDRAM)作这图像数据的帧存,解决了高分辨率图像采集中容量和速度上的问题,SDRAM分时供FPGA和DSP访问的机制提高了数据存取的效率.JPEG压缩方法大大降低了数据传输所需的带宽并减少了存储所需的容量.该系统能够对高至2 048×1 536的多种分辨率的图像实现数据采集和压缩. 相似文献
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《电子技术应用》2017,(6)
针对遥测系统图像单元存在数据量大、速度快、无法直接存储显示等问题,设计了一种高速图像存储与实时显示系统。系统以Spartan 6系列现场可编程门阵列(FPGA)作为核心处理器,使用Full模式Camera Link接口采集CMOS相机输出的图像数据,利用DDR3乒乓缓存技术将图像数据写入由SATA控制器组成的磁盘阵列中,并且通过千兆以太网接口将处理后的数据上传至计算机;图像数据采用抽帧以及降低分辨率的形式,将其转换为1 024×768像素的VGA分辨率格式,最后通过VGA接口对图像进行实时显示。实验结果表明,该系统能够对分辨率为2 048×2 048像素、帧频为150 f/s的高速图像数据进行长时间存储与实时显示。 相似文献
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张涛 《计算机测量与控制》2015,23(1):86-89
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. 相似文献
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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. 相似文献
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《Information & Management》2016,53(6):787-802
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. 相似文献
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Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China. 相似文献
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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. 相似文献
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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. 相似文献
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《浙江大学学报:C卷英文版》2014,(11)
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 相似文献
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Zhao-hui WU 《浙江大学学报:C卷英文版》2014,(10)
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 相似文献
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《浙江大学学报:C卷英文版》2014,(10)
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 相似文献