排序方式: 共有70条查询结果,搜索用时 15 毫秒
61.
莫雪婷 《铁路通信信号工程技术》2012,9(2):72-73
目前,青藏线ITCS系统车载日志下载工作采用人工手动连接车载计算机方式,容易造成车载计算机遭受病毒侵害以及硬件接口损坏,为此,提出一种通过无线数据传输下载日志的方法,可以有效解决问题。 相似文献
62.
In a peer-to-peer file-sharing system, a free-rider is a node which downloads files from its peers but does not share files
to other nodes. Analyzing the free-riders’ impact on system throughputs is essential in examining the performance of peer-to-peer
file-sharing systems. We find that the free-riders’ impact largely depends on nodes behavior, including their online time
and greed of downloading files. We extend an existing peer-to-peer system model and classify nodes according to their behavior.
We focus on two peer-to-peer architectures: centralized indexing and distributed hash tables. We find that when the cooperators
in a system are all greedy in downloading files, the system throughput has little room to increase while the cooperators throughput
degrade badly with the increasing percent of greedy free-riders in the system. When all the cooperators are non-greedy with
long average online time, the system throughput has much room to increase and the cooperators throughput degrade little with
a high percent of greedy free-riders in the system. We also find that if a system can tolerate a high percent of greedy free-riders
without suffering much throughput degradation, the system must contain some non-greedy cooperators that contribute great idle
service capacity to the system.
Foundation item: the National High Technology Research and Development Program (863) of China (No. 2007AA01Z457), and the Shanghai Science
and Technology Development Funds (No. 07QA14033) 相似文献
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介绍了一个win98下的应用程序的开发过程,利用该程序可以实现文件的传输下载,并实现远程文件自动更新,具有较高的实用价值。 相似文献
65.
电力机车电能无线抄表系统 总被引:1,自引:1,他引:0
结合机车运行和管理的实际,提出了电力机车电能无线抄表系统方案,并介绍了系统的组成和基本原理,该系统可自动下载机车电能数据并能实时将数据传送到供电、机务和财务等相关部门。 相似文献
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针对机车入库人工转储LKJ文件存在的弊端,提出一种基于车载数据采集、移动通信技术的LKJ文件远程自动下载方案,介绍LKJ文件远程下载总体方案、文件传输机制、流程,通过地面测试和装车运用对LKJ文件远程自动下载进行验证。为实时分析在途机车的LKJ设备质量情况提供数据依据。 相似文献
68.
近日,深圳市市场监管局发布通报,因腾讯公司涉嫌发布虚假广告及使用绝对化用语,对其作出20万元罚款。针对此事,11月18日,腾讯公司表示,此次被处罚的虚假广告,是看点快报的现金福利活动:用户下载“看点快报”App后可获得总共6.2元,其中下载当天先领取0.88元,剩余的5.32元将在随后6天内发放完毕。 相似文献
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针对空中下载(Over The Air,OTA) 升级失败时,实时操作系统 (Real Time Operating System,RTOS) 控制器无法进行软件回滚的问题,提出了一种双分区升级技术,此技术分为同面启动升级和异面启动升级。同面启动升级通过外扩存储器作为备份分区,升级时将原程序复制至备份分区后将软件下载至激活分区启动执行;而异面启动升级通过读取控制器分区信息将软件下载至备份分区,利用地址重映射技术和SWAP AB技术进行分区切换,从而实现升级或失败时软件回滚。通过搭建测试环境验证了该软件回滚技术的可行性、有效性及稳定性。 相似文献