| 以下仅列出文章摘要、目录等部分内容，如需获取完整论文资料，或原创定制、长期合作，请随时联系。 微信QQ:312050216 |
 |
 |
| 基于Android的爱心救助系统的设计与实现
中文摘要
本论文的研究基于Android平台，在该平台下，进行爱心救助系统的设计与实现。通过文献分析、数据调查等方式对当前的发展市场现状以及行业趋势进行分析，本方案有两个研究要点：一是如何获取用户的位置信息，如何将求救信息快速的发送给紧急联系人。二是如何实现筹款的基本功能，收集用户信息。三是做好交互界面，让用户可以感受到较好的使用体验。希望本次设计的爱心救助系统，可以很好的帮助当前社会的弱势群体，促进了社会的公益性，让社会更加和谐。同时也非常符合今年国家脱贫攻坚的战略，为整个社会尽一份绵薄之力。
Title GNSS Positioning Using Mobile Devices with the Android Operating System
Abstract
The access and the use of the global navigation satellite system (GNSS) pseudo-range and carrier-phase measurements mobile devices as smartphones and tablets with an Androidoperating system has transformed the concept of accurate positioning with mobile devices. In this work, the comparison of positioning performances obtained with a smartphone and an external mass-market GNSS receiver both in real-time and post-processing is made. Particular attention is also paid to accuracy and precision of positioning results, also analyzing the possibility of estimating the phase ambiguities as integervalues (fixed positioning) that it is still challenging for mass-market devices. The precisions and accuracies obtained with the mass-market receiver were about 5 cm and 1 cm both for real-time and post-processing solutions, respectively,while those obtained with a smartphone were slightly worse (few meters in some cases) due to the noise of its measurements.
Keywords smartphone positioning; GNSS; Android; raw measurements
sitioning; GNSS; Android; raw measurements
|
