汽车组合仪表板控制系统设计

介绍了以PIC16F873单片机为控制核心的汽车组合仪表板控制系统的设计,简述了汽车组合仪表板的基本构成,介绍了汽车组合仪表板控制系统的组成和各部分功能,给出了数据采集处理电路、电源电路等部分硬件电路设计方案,并阐述了一些软件设计算法,如分段插补法和用于平滑指针的软件设计算法等。     

汽车虚拟仪表盘的仿真设计

汽车仪表盘反映了汽车行驶过程的多种参数,设计虚拟仪表盘仿真系统在教学科研中具有重要意义。在分析汽车仪表盘功能的基础上,提出了汽车虚拟仪表盘总体设计方案。编写通信程序实现了上位 PC 机和下位单片机系统的数据采集发布功能。应用VB开发了数字化汽车虚拟仪表盘界面与性能仿真系统,可模拟发动机转速、车速、温度、时间及里程等信息实时显示在计算机界面上;操作控制按钮可实现汽车转向灯指示功能。经实际试验运行显示该仿真系统工作正常,实现了对汽车仪表盘的仿真效果。     

基于openstack的虚拟机定时任务的设计与实现

致力于为 openstack 设计一个可以设定虚拟机实例定时运行功能的插件。该插件是基于openstack的 horizon组件的功能拓展,用户可以像以往使用 horizon的 dashboard的功能一样去使用它。用户通过这个组件可以设定每一天虚拟机运行的起止时间,以及每周需要哪几天运行的周期循环时间。整个插件的设计完全遵循Dj ango的设计原则。     

Quantifying requirements volatility effects

In an organization operating in the bancassurance sector we identified a low-risk IT subportfolio of 84 IT projects comprising together 16,500 function points, each project varying in size and duration, for which we were able to quantify its requirements volatility. This representative portfolio stems from a much larger portfolio of IT projects. We calculated the volatility from the function point countings that were available to us. These figures were aggregated into a requirements volatility benchmark. We found that maximum requirements volatility rates depend on size and duration, which refutes currently known industrial averages. For instance, a monthly growth rate of 5% is considered a critical failure factor, but in our low-risk portfolio we found more than 21% of successful projects with a volatility larger than 5%. We proposed a mathematical model taking size and duration into account that provides a maximum healthy volatility rate that is more in line with the reality of low-risk IT portfolios. Based on the model, we proposed a tolerance factor expressing the maximal volatility tolerance for a project or portfolio. For a low-risk portfolio its empirically found tolerance is apparently acceptable, and values exceeding this tolerance are used to trigger IT decision makers. We derived two volatility ratios from this model, the π-ratio and the ρ-ratio. These ratios express how close the volatility of a project has approached the danger zone when requirements volatility reaches a critical failure rate. The volatility data of a governmental IT portfolio were juxtaposed to our bancassurance benchmark, immediately exposing a problematic project, which was corroborated by its actual failure. When function points are less common, e.g. in the embedded industry, we used daily source code size measures and illustrated how to govern the volatility of a software product line of a hardware manufacturer. With the three real-world portfolios we illustrated that our results serve the purpose of an early warning system for projects that are bound to fail due to excessive volatility. Moreover, we developed essential requirements volatility metrics that belong on an IT governance dashboard and presented such a volatility dashboard.     

MB90F428单片机内置CAN总线及在汽车仪表上的应用

利用MB90F428单片机构建了汽车仪表系统的检测和驱动模块,各模块间用CAN总线建立了通信网络。本文还详细地讨论了MB90F428内嵌CAN控制器地编程。     

Socially augmented argumentation tools: Rationale,design and evaluation of a debate dashboard

Collaborative Computer-Supported Argument Visualization (CCSAV) is a technical methodology that offers support for online collective deliberation over complex dilemmas. As compared with more traditional conversational technologies, like wikis and forums, CCSAV is designed to promote more critical thinking and evidence-based reasoning, by using representations that highlight conceptual relationships between contributions, and through computational analytics that assess the structural integrity of the network. However, to date, CCSAV tools have achieved adoption primarily in small-scale educational contexts, and only to a limited degree in real world applications. We hypothesise that by reifying conversations as logical maps to address the shortcomings of chronological streams, CCSAV tools underestimate the importance of participation and interaction in enhancing collaborative knowledge-building. We argue, therefore, that CCSAV platforms should be socially augmented in order to improve their mediation capability. Drawing on Clark and Brennan influential Common Ground theory, we designed a Debate Dashboard, which augmented a CCSAV tool with a set of widgets that deliver meta-information about participants and the interaction process. An empirical study simulating a moderately sized collective deliberation scenario provides evidence that this experimental version outperformed the control version on a range of indicators, including usability, mutual understanding, quality of perceived collaboration, and accuracy of individual decisions. No evidence was found that the addition of the Debate Dashboard impeded the quality of the argumentation or the richness of content.     

基于CDC3207G的汽车仪表板设计

应用德国Micronas公司的CDC3207G微控制器开发了一款汽车仪表板系统。详细地介绍了该系统的硬件原理,以及步进电机,音频控制,LCD显示,LED指示灯和报警灯等几个模块的实现方法。应用μC/OS-II实时操作系统开发软件。着重介绍了启动代码的设计和任务的规划。     

汽车座舱反光问题以及优化手段分析

基于目前常见的汽车座舱反光问题,描述反光形成的基本原理,介绍两种通用的定性、定量反光分析方法,最后针对某款多屏电子仪表板,进行了主驾屏反光分析以及优化,为该方法在整车内饰布置开发的推广使用提供了参考。     

基于MC9S12HZ的智能汽车组合仪表

首先介绍了飞思卡尔MC9S12HZ系列微控制器的基本组成结构和特性。然后给出了一个以MC9S12HZ控制器为核心的汽车仪表板的具体实例,该仪表能够根据使用环境自动地识别信息来源,并根据信息源的优先级正确地进行选择,从而扩展了仪表的适应范围。实验结果表明,该仪表具有较高的指示精度和很强的通用性。     

地铁施工安全仪表盘技术研究与应用

地铁施工安全受工程地质条件、当前施工进度、周边环境等多因素综合影响。通过构建可视化仪表盘,基于地铁工程三维实体模型,动态显示在上述各影响因素耦合作用下工程的安全状态,支持作业风险和危险构件及其影响区域实时预警和控制,准确识别工程的最危险部位、风险区域分布、等级状态等,为现场安全管理提供决策支持。