共查询到20条相似文献,搜索用时 314 毫秒
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基于ARM的车载GPS定位终端的设计 总被引:1,自引:0,他引:1
论文设计了一套基于ARM处理器的车载GPS系统.采用AT91RM9200处理器为硬件平台,在该处理器上移植Linux操作系统,利用操作系统的资源编写程序实现GPS和GPRS的功能在车载GPS系统中的应用.本文提供了一套切实可行的具有实时监控能力的车载GPS卫星定位系统设计方案. 相似文献
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基于嵌入式Qt的车载GUI平台的设计 总被引:2,自引:0,他引:2
文章通过对现行几种嵌入式GUI系统进行分析比较,选择嵌入式Qt系统作为车载GUI的开发平台,提出了基于嵌入式Qt的车载娱乐系统GUI平台的设计方案及多媒体处理软件的构架.文章还对车载娱乐系统GUI平台设计过程中涉及到的窗口系统结构设计和事件响应设计做了详细的论述,并提出了自己的解决方案,实现了嵌入式车载娱乐系统GUI的基本功能. 相似文献
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介绍了一种新型的具有图形化界面的车载DVD影音系统,给出了DVD影音系统的主机模块和显示屏模块的设计方案,并介绍了基于YGV629的DVD视频画面和图形化界面的叠加原理,最后给出了系统的软件实现方法。该设计方案实现的车载影音系统操作界面友好、灵活性强,只需修改相应的图形库,即可应用于需要视频图形叠加的其他领域。 相似文献
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给出一款基于MSP430F5438的智能公交车载系统设计方案,阐述了该车载系统的主要功能,并对其总体结构、硬件电路以及软件设计进行详细论述。车载系统充分利用Zigbee无线通信技术、超声波、温湿度传感器技术,实现公交车到站距离显示、超声波测距、温湿度自动调节以及语音自动报站等功能。 相似文献
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锁珊珊 《数字社区&智能家居》2007,3(14):466-467
通过对嵌入式车载导航仪系统架构的剖析,给出基于GPRS网络的GPS车载导航仪的设计方案;对比四种常用的嵌入式图形用户界面,最终确定使用MINIGUI图形系统,作为连接导航应用系统和嵌入式操作系统的纽带.同时简单介绍了MINIGUI图形系统在嵌入式车载导航仪开发平台的移植过程. 相似文献
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OBJECTIVE: To investigate the effect of optic flow on gait behavior during treadmill walking using an immersive virtual reality (VR) setup and compare it with conventional treadmill walking (TW) and overground walking (OW). BACKGROUND: Previous research comparing TW with OW speculated that a lack of optic flow (relative visual movement between a walker and the environment) during TW may have led to perceptual cue conflicts, resulting in differences in gait behavior, as compared with OW. METHOD: Participants walked under three locomotion conditions (OW, TW, and TW with VR [TWVR]) under three walking constraint conditions (no constraint, a temporal/pacing constraint, and a spatial/path-following constraint). Presence questionnaires (PQs) were administered at the close of the TWVR trials. Trials were subjected to video analysis to determine spatiotemporal and kinematics variables used for comparison of locomotion conditions. RESULTS: ANOVA revealed gait behavior during TWVR to be between that of OW and TW. Speed and cadence during TWVR were significantly different from those of TW, whereas knee angle was comparable to that of OW. Correlation analysis of PQ scores with gait measures revealed a positive linear association of the distraction subfactor of the PQ with walking speed during TWVR, suggesting an increase in the sense of presence in the virtual environment led to increases in walking speed. CONCLUSION: The results demonstrate that providing optic flow during TW through VR has an impact on gait behavior. APPLICATION: This study provides a basis for developing simple VR locomotion interface setups for gait research. 相似文献
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《Simulation Practice and Theory》1998,6(2):149-163
This paper describes an object-oriented Time Warp (TW) mechanism which supports general parallel simulation on a distributed, possibly heterogeneous, computing environment. As a significant application of the developed TW, a simulation model adequate for large personal communication services (PCS) networks is proposed and its performance results given. Special attention is paid to such TW critical issues as load balancing and checkpointing interval tuning which strongly affect the achievement of good speedups. The experimental results confirm that good performance can be obtained on an heterogeneous distributed system provided an accurate parameter tuning is accomplished. 相似文献
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该文介绍了基于FIC8120和TW9910的网络视频服务器系统架构,简要分析了TW9910硬件电路以及软件的初始化配置。 相似文献
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该文介绍了基于FIC8120和TW9910的网络视频服务器系统架构,简要分析了TW9910硬件电路以及软件的初始化配置。 相似文献
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Time warp (TW), although generally accepted as a potentially effective parallel and distributed simulation mechanism for timed Petri nets, can reveal deficiencies in certain model domains. Particularly, the unlimited optimism underlying TW can lead to excessive aggressiveness in memory consumption due to saving state histories, and waste of CPU cycles due to over-optimistically progressing simulations that eventually have to be “rolled back”. Furthermore, in TW simulations executing in distributed memory environments, the communication overhead induced by the roll-back mechanism can cause pathological overall simulation performance. In this work, an adaptive optimism control mechanism for TW is developed to overcome these shortcomings. By monitoring and statistically analyzing the arrival processes of synchronization messages, TW simulation progress is probabilistically throttled based on the forecasted time stamp of forthcoming messages. Two classes of arrival process characterizations are studied, reflecting that a natural trade-off exists among the computational and space complexity, and the respective prediction accuracy: While forecasts based on metrics of central tendency are computationally cheap but yield inadequate predictions for correlated arrivals (thus negatively affecting performance), time series based forecast methods give higher prediction accuracy, but at higher computational cost 相似文献
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基于TW2824的OSD技术研究与实现 总被引:8,自引:0,他引:8
OSD是一种广泛应用于各种视频系统的在屏显示技术.以数字硬盘录像机(DVR)为例,简单介绍了基于视频处理芯片TW2824的DVR系统总体结构,详细讨论了利用TW2824实现的OSD字符存储、显示与控制技术.通过将GUI界面划分为单元格,克服了TW2824芯片的OSD只能显示字符和数字的限制,为用户提供了功能丰富的GUI界面. 相似文献
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概念交通工具造型创新是形态创新的过程,创意草图是形态推演的常用手段。在了解基本形概念、形体组合方式的基础上,结合造型形态的设计原则,对基本形的绘制原则和方法进行分析。通过案例的设计应用,阐述了基本形的抽象性、发散性与概念交通工具造型设计具有适应性和可应用性,为概念交通工具创意草图设计提供了较为可行的方法。 相似文献
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随着铁路运输不断发展,对货运列车的安全提出了更高要求。目前的地对车安全监控体系由于技术限制,无法满足列车实时的安全需求。车载传感器可以实时收集车辆信息,保证列车安全运行。车载传感器通信基础是车载网络。安全车载网络组成的基础是网络节点的身份认证,提出适用于货运列车车载网络节点身份认证的轻量级身份认证协议,轻量级身份认证保证所有网络节点均为可信节点,并且减少与可信第三方的交互。 相似文献
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针对当前汽车动力学仿真软件建模复杂度高、模型结构不易理解、模板开放性不高等缺点,提出开放的模板化建模技术.将汽车动力学模型分解为相对独立的子系统并抽象为基本模板,采用“基本模板—结构模板—模板实例化”的架构,用XML描述模板,从而实现模板的开放性,构建汽车动力学模型的树状层级模板库和实例库,结合基于实例推理的方法生成模型.在此基础上开发了汽车整车建模软件,并以某重型汽车起重机为例说明了该技术的应用. 相似文献