共查询到20条相似文献，搜索用时 62 毫秒
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探讨整合云端导向海量分布式运算与android平台的移动通讯设备的GPS定位等技术,模拟制作应用于手机式设备的导游领队管理系统。系统能根据GPS定位,提供app应用程序,给旅行社提供必要的信息至云端后台,经海量分布式运算供后续撷取运用。在Android操作系统的智能机上实现了GPS的应用开发,在网络与手机科技的不断进步下,旅行业得以通过科技突破传统,能通过云端结合信息化系统及手机科技,将可以带给旅客更不同的旅行体验,手机通讯是未来的趋势,其重点发展在于软件。通过各个功能的实时性,遇到状况时可以提供使用者最快速的服务,没有地域限制则让使用者能在任何地点实现本系统的功能。 相似文献
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针对未来物联网农业产生的海量数据采集、管理和挖掘问题,本文提出了基于Hadoop集群分布式存储与传统MySQL数据库相结合的农业大数据云端系统。通过无线传感器网络构建农作物生长环境参数,如温度、湿度、光照度、土壤湿度及图像视频等数据采集和传输平台,数据最后汇聚到云端通过H adoop分布式计算框架和MapReduce编程模型对农业海量数据进行存储、检索、管理和决策,为农作物生长过程实时监测和最优化生产提供指导,实现方便、快捷、高效和低成本的农业管理系统。 相似文献
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周建华 《西安文理学院学报》2014,(4):75-81
海量数据给微博舆情实时监控预警带来了严峻的挑战,将Hadoop关键技术引入微博舆情分析研究领域,以探寻分布式环境下的高效率短文本数据查询与推理方法,以微博数据结构为基础,结合云计算Hadoop关键技术特性,提出了一种海量微博数据分析预警框架.HDFS为海量微博的数据提供了存储,而MapReduce为海量微博的数据提供快速运算.采用Map(映射)和Reduce(规约)规则,对微博用户关系和内容数据的大规模数据集进行并行运算,以实现并行化高效预处理、深度分析和舆情实时五级预警.为验证计算效率与Reduce任务数之间关系,对Reduce任务数进行实验,结果表明,在Map一定的情况下,随微博数据集的增大到2 GB后,多任务数Reduce执行时间相比少任务数Reduce大大缩短. 相似文献
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为实现对工厂厂区、旅游景区、游乐场所等特定区域专用机动车辆的监管,提出一种在Java环境下,基于SpringBoot后端框架的场车定员定位云服务管理系统.该系统采用Vue轻量级前端框架,通过页面数据完成双向绑定,实现动态变化,集成Redis缓存技术,提升数据读取速度和Shiro-JWT框架,为系统的安全防护提供保障.该系统可对云端数据库接收到的GPS定位数据进行数据分析,利用高德地图进行可视化展示,并通过移动端发送人脸数据进行人脸校验,最终实现轨迹回放、人脸识别、数据分析等功能. 相似文献
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互联网的迅速发展产生了各种海量数据,快速有效处理海量数据是云计算的目标。Hadoop作为典型的云计算平台可高效处理海量数据。介绍了Hadoop相关概念,包括HDFS、MapReduce等众多子项目;阐述了Hadoop完全分布式平台搭建,包括环境配置、搭建方法等;通过数据处理实验验证了Hadoop分布式平台的有效性。 相似文献
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GPS以其具有全能性、全球性、全天候、精度高、观测时间短、测站间不需要通视等优点,在众多领域中已经得到广泛应用。本文在探讨GPS定位原理的基础上,分析了GPS定位误差来源和分类,提出了消弱各类误差的方法和途径,为提高GPS定位精度提供了参考依据。 相似文献
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提出了基于HBase的海量钻井数据存储技术。将HBase的分布式存储特点和钻井工程的实际需求相结合,设计了一个快速、高效、安全的海量钻井数据存储方案。介绍了HBase的存储模型以及系统架构,详细描述了钻井数据在HBase分布式存储系统中的存储过程。 相似文献
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针对当前生物医学实验室平台物品安全管理困难的问题,设计了一种高精度低功耗实验室物品室内外定位追踪系统。该系统采用蓝牙进行室内定位,GPS结合北斗的方法实现室外定位,并利用加速度传感器检测物品的位移来控制系统的功耗,然后通过GPRS无线通信模块将定位数据发送到数据库中,在数据库中完成定位运算并将数据进行保存,用户利用手机APP访问数据库实时查看物品位置信息。通过实验测试,证明了本系统可以有效地对实验室物品进行定位追踪。 相似文献
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提出了嵌入式GPS终端设计方案,通过单片机控制的串口通信利用车载GPS终端提供的定位信息和CDMA无线通讯功能,实现实时显示定位信息等功能,达到人机交互的目的,同时结合中心软件来更好地实现车辆调度功能. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献