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任重 《电脑编程技巧与维护》2011,(14):4-5,8
根据实际经验,从开发环境、字符集、编程接口及硬件平台等多方面,分析Windows CE.NET应用程序与一般桌面Windows应用程序开发的差异,为开发人员快速从桌面转到Windows CE.NET嵌入式开发提供参考. 相似文献
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基于ARM-WINCE的嵌入式图像分析与处理系统与基于PC计算机的图像处理系统相比,具有速度更快、体积更小、应用灵活及成本更低等特点。介绍基于ARM-WINCE平台,在EVC(Embedded Visual C++)环境下开发静态图像处理用户界面,进行图像分析和算法实现。实验结果表明用EVC开发的图像用户界面应用于嵌入式图像处理系统效果良好。 相似文献
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本文介绍怎样开发高效的Windows CE应用程序.概述了消息的接收和分发机制,讨论了一些引起Windows CE程序开发不同于其他Windows 平台的独特特性. 相似文献
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Electric vehicles (EVs) present efficiency and environmental advantages over conventional transportation. It is expected that in the next decade this technology will progressively penetrate the market. The integration of plug-in electric vehicles in electric power systems poses new challenges in terms of regulation and business models. This paper proposes a conceptual regulatory framework for charging EVs. Two new electricity market agents, the EV charging manager and the EV aggregator, in charge of developing charging infrastructure and providing charging services are introduced. According to that, several charging modes such as EV home charging, public charging on streets, and dedicated charging stations are formulated. Involved market agents and their commercial relationships are analysed in detail. The paper elaborates the opportunities to formulate more sophisticated business models for vehicle-to-grid applications under which the storage capability of EV batteries is used for providing peak power or frequency regulation to support the power system operation. Finally penetration phase dependent policy and regulatory recommendations are given concerning time-of-use pricing, smart meter deployment, stable and simple regulation for reselling energy on private property, roll-out of public charging infrastructure as well as reviewing of grid codes and operational system procedures for interactions between network operators and vehicle aggregators. 相似文献
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An experimental analysis is conducted investigating the differences between the variations of overall and local instantaneous heat transfer coefficients, during the engine cycle, in the combustion chamber walls of a direct injection (DI), air-cooled diesel engine located at the authors’ laboratory. For this purpose, a novel experimental installation is developed, which separates the engine transient temperature signals into two parts, namely the long- and the short-term response ones, processed in two independent data acquisition systems. Moreover, a new pre-amplification unit for fast response thermocouples, appropriate heat flux sensors and an object-oriented control code for fast data acquisition have been designed and applied. Experimentally obtained cylinder pressure diagrams are used as a basis for the calculation of the overall heat transfer coefficients, whereas one-dimensional heat conduction theory with Fourier analysis techniques, combined with an iterative procedure between calculated and measured temperature data, are implemented in order to calculate the instantaneous local heat transfer coefficients in the engine cylinder. Analysis of the experimental results reveals interesting aspects of transient engine heat transfer. Significant differences are disclosed between the overall and local heat transfer coefficient variations, with the importance of the latter one on engine design being emphasized. The local heat transfer coefficient on the cylinder head is quantified based on the experimental data. The effect of engine speed and load as well as of the air swirling motion on the heat transfer variations are presented. From the analysis results it is concluded that the instantaneous heat transfer variation is non-uniform, unlike its values calculated from standard correlations that assume spatial uniformity, noting that such information, especially for air-cooled diesel engines, seems to be very scarce in the open literature. 相似文献
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本文分析了Win32环境下内存映射文件技术的系统实现原理,并结合嵌入式文件系统的特点,给出了该技术在嵌入式实时通讯系统中对多进程间数据共享问题的解决方案,提高了系统的实时性,具有一定的推广价值。 相似文献
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在基于Windows CE操作系统的ARM嵌入式系统上实现了一套通用工业过程软仪表。选用ARM嵌入式系统作为硬件平台,基于普通PC机上的嵌入式应用软件开发包Embeded VC 开发,应用双重RBF神经网络的模型作为软测量的数学模型。该软件包采用面向对象的软件体系结构,根据模块细化原则可以划分为系统调度、数据预处理、系统组态、核心算法、通讯和人机界面等6个模块。应用该软仪表对某化工厂加压甲醇精馏塔塔顶甲醇浓度模型进行仿真测试,取得了较好的结果。 相似文献
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陈涛 《组合机床与自动化加工技术》2010,(6)
为了提高数控系统的柔性和开放性,满足更高的实时性要求,文中根据逐点比较法圆弧插补原理,使用EVC在基于ARM处理器的WINCE操作系统上实现了四个象限的圆弧插补功能. 相似文献