今天为大家分享一篇优秀的论文范文-北美最强代写：服务生态系统。本文讲述的是随着时间的推移，航海是人类获得和完善的最重要的技能之一。它开始跟踪北星、风向和太阳的运动，现在已经发展到今天使用GPS(全球定位系统)、声纳(声导航和测距)等最有效的导航技术之一。
北美最强代写：服务生态系统
定位是导航的重要组成部分，它是指在指定的区域内定位感兴趣的目标。这种技术目前被用于资产定位、救援行动、导航等。GPS是目前最流行的导航系统，由美国国防部开发，并在后期公开使用。如今，大多数导航系统都使用GPS，而GPS又一次显示出卓越的性能。不幸的是，由于室内环境的吸收、多路径反射、干扰等因素，GPS在室内环境中的精度不如室外环境。需要一个定位系统来帮助定位资产，比如楼房里的病人，工业车间里的移动工业机械，以及像失火建筑这样危险建筑里的受害者。一种仍在研究中的革命性方法是同行辅助导航。北美最强代写在一个环境中出现的各种智能手机可以看作是高密度的发射器和接收器，形成一个复杂的网络来定位感兴趣的对象。各种电话之间的通信是通过声学(声音)来完成的。同伴辅助定位算法的直觉是基于设备之间的相对距离构建一个图形，然后将该图形叠加到基于初始WiFi位置估计的签名地图上。该算法根据签名映射旋转并平移图形，这样顶点的位置接近真实位置，这是由特定的度量标准测量的。其可行性仍在评估中。最后，最流行的一种是RSSI指纹技术，它是廉价和容易获得的，但有很多因素使它不可靠的使用。
北美最强代写：服务生态系统
Navigation is one of the most significant skills which humans have acquired and perfected with time. It started with following the North-Star, direction of wind and movement of sun which has now reached to one of the most efficient techniques of navigation today which use GPS (Global Positioning System), SONAR (Sound Navigation and Ranging) etc. Localization is an important part of navigation which means to locate an object of interest in a designated area. This technique is used these days for locating assets, rescue operations, navigation etc. GPS is the most popular Navigation system used these days, which was developed by US Dept of Defence and the made public for general use in later stages. Majority of navigation systems today rely use GPS which has displayed exceptional performance time and again. Unfortunately, GPS is not as accurate in indoor environment as it is in outdoor environment due to absorption, Multipath reflection, interference experienced in indoor environment. A Localisation system which helps locate assets like patients in a building, mobile industrial machinery in an industrial workshop, victims in hazardous buildings like a building北美最强代写 on fire is required. A revolutionary approach still under research is Peer-assisted navigation. Presence of various smart phones in an environment can be seen as high density transmitters and receivers which form a complex web of network for locating an object of interest. The communication between various phones is done by using acoustics (sound). The intuition underlying the peer assisted localization algorithm is to construct a graph based on the relative distances among devices, and then superimpose the graph onto the signature map based on the initial WiFi location estimates. The algorithm rotates and translationally 1 moves the graph against the signature map, such that the vertices have a close placement to the true locations, as measured by certain metric. Its feasibility is still under evaluation. Finally, the most popular one is RSSI fingerprinting technique which is cheap and readily available, but it has a lot of factors that make it unreliable to use.
