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介绍WindowsNT设备驱动程序的原理和组成,描述WindowsNT驱动程序模型,并以实现内存缓冲区的共享为目标,浅议了设备驱动程序的开发。 相似文献
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介绍一种基于单片机的测试模块设计方法。采用51系列单片机,对硬件电路进行模块化设计;采用C语言对软件(核心)部分进行设计。所设计的模块供专用测试设备使用,可以有效地提高其通用性、可扩展性和可维护性,具有较强的实用价值。 相似文献
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本文介绍了基于Win2000的WDM设备驱动程序的模型、基本原理、分层结构,开发工具,以及最后的编译、安装等方面的内容。 相似文献
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本文首先介绍了Windows 9.x下的驱动程序,并阐述了虚拟机、保护模式的概念,然后对VxD的原理进行了说明。最后,介绍了两种开发VxD的工具。 相似文献
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目的 针对每种飞行器都需要设计专用的包装箱现状,设计一种新型通用化的包装箱,满足运输与起吊要求,可适应多种飞行器的使用。方法 根据设计要求进行了包装箱的结构设计,利用有限元分析方法与工程算法对运输工况、起吊工况进行分析,并进行可靠性、安全性、维修性和保障性分析。结果 得到了在运输与起吊最大质量产品工况下,包装箱钢骨架的最大应力分别为166 MPa和215 MPa,小于材料的屈服强度,满足强度要求,且具备较高的可靠性、安全性、维修性和保障性。结论 包装箱结构设计满足设计要求,可用于多种尺寸的飞行器运输,降低了设计成本。 相似文献
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介绍了专用测试设备的特点、传统校准接口与智能化校准接口的区别、硬件设计及软件设计,尤其对软件的结构特点作了详细的论述,展望了专用测试设备校准的发展方向. 相似文献
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Towards a general theory of driver behaviour 总被引:2,自引:0,他引:2
Fuller R 《Accident; analysis and prevention》2005,37(3):461-472
Taylor [Taylor, D.H., 1964. Drivers' galvanic skin response and the risk of accident. Ergonomics 7, 439-451] argued that drivers attempt to maintain a constant level of anxiety when driving which Wilde [Wilde, G.J.S., 1982. The theory of risk homeostasis: implications for safety and health. Risk Anal. 2, 209-225] interpreted to be coupled to subjective estimates of the probability of collision. This theoretical paper argues that what drivers attempt to maintain is a level of task difficulty. Naatanen and Summala [Naatanen, R., Summala, H., 1976. Road User Behaviour and Traffic Accidents. North Holland/Elsevier, Amsterdam, New York] similarly rejected the concept of statistical risk as a determinant of driver behaviour, but in so doing fell back on the learning process to generate a largely automatised selection of appropriate safety margins. However it is argued here that driver behaviour cannot be acquired and executed principally in such S-R terms. The concept of task difficulty is elaborated within the framework of the task-capability interface (TCI) model, which describes the dynamic interaction between the determinants of task demand and driver capability. It is this interaction which produces different levels of task difficulty. Implications of the model are discussed regarding variation in performance, resource allocation, hierarchical decision-making and the interdependence of demand and capability. Task difficulty homeostasis is proposed as a key sub-goal in driving and speed choice is argued to be the primary solution to the problem of keeping task difficulty within selected boundaries. The relationship between task difficulty and mental workload and calibration is clarified. Evidence is cited in support of the TCI model, which clearly distinguishes task difficulty from estimates of statistical risk. However, contrary to expectation, ratings of perceived risk depart from ratings of statistical risk but track difficulty ratings almost perfectly. It now appears that feelings of risk may inform driver decision making, as Taylor originally suggested, but not in terms of risk of collision, but rather in terms of task difficulty. Finally risk homeostasis is presented as a special case of task difficulty homeostasis. 相似文献
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