Results 271 to 280 of about 514,814 (311)

Trajectory Data Protection

2021
In recent years, we have witnessed the fast development of smart mobile devices. We have become the data contributors and service users of various applications in a smart city by using these mobile devices. Intuitively, uploading true locations to the server will improve the quality of services.
Chao Chen, Daqing Zhang, Yasha Wang, Hongyu Huang   +3 more
openaire   +1 more source

A Conceptual Data Model for Trajectory Data Mining

2010
Data mining has become very popular in the last years, and it is well known that data preprocessing is the most effort and time consuming step in the discovery process. In part, it is because database designers do not think about data mining during the conceptual design of a database, therefore data are not prepared for mining.
Vania Bogorny, Carlos Alberto Heuser, Luis Otávio Alvares   +2 more
openaire   +1 more source

Modeling Trajectory Data as a Directed Graph

2018
In the last decade, usage of personal smartphones has tremendously increased. Almost everyone is using cell phones, which are communicating with location-aware devices. A large amount of trajectory data is produced from these devices and can be used for information services.
Ali Korkmaz, Ferdi Elik, Furkan Aydin, Mertcan Bulut, Seda Kul, Ahmet Sayar   +5 more
openaire   +2 more sources

Noise filtering, trajectory compression and trajectory segmentation on GPS data

2016 11th International Conference on Computer Science & Education (ICCSE), 2016
With the rapid development of GPS devices, satellite and wireless communications technologies, many trajectory data is generated. Consequently, processing and analyzing trajectory data have become a hot topic. In this paper, an improved noise filtering, trajectory compression and trajectory segmentation method based on Kalman filter and Douglas-Peucker
Kunhui Lin, Zhentuan Xu, Ming Qiu, Xiaoli Wang 0002, Tianxiong Han   +4 more
openaire   +1 more source

Sampling Big Trajectory Data for Traversal Trajectory Aggregate Query

IEEE Transactions on Big Data, 2019
This paper defines and investigates a novel trajectory query, namely, Traversal Trajectory Aggregate (TTA) Query: Given a trajectory database and a pair of upstream and downstream spatio-temporal (ST) regions (i.e., spatial area coupled with a time interval), a TTA query aims to retrieve the total number of unique trajectories that traverse through ...
Yichen Ding, Yanhua Li, Xun Zhou 0001, Zhuojie Huang, Simin You, Jun Luo 0007   +5 more
openaire   +1 more source

A Trajectory Prediction Method with Sparsity Data

2017 IEEE International Symposium on Parallel and Distributed Processing with Applications and 2017 IEEE International Conference on Ubiquitous Computing and Communications (ISPA/IUCC), 2017
A timely and accurate prediction of the vehicle’s trajectory can render a good service, help predict traffic flow, and in the more interesting case, detect potentially dangerous situations as early as possible. It is widespread to use historical data to predict trajectories.
Hengfei Fan, Wenbin Yao
openaire   +1 more source

Approximate Aggregations in Trajectory Data Warehouses

2007 IEEE 23rd International Conference on Data Engineering Workshop, 2007
In this paper we discuss how data warehousing technology can be used to store aggregate information about trajectories and perform OLAP operations over them. To this end, we define a data cube with spatial and temporal dimensions, discretized according to a regular grid.
F. BRAZ, ORLANDO, Salvatore, ORSINI, Renzo, RAFFAETA', Alessandra, RONCATO, Alessandro, SILVESTRI, Claudio   +5 more
openaire   +2 more sources

Frequent trajectory mining on GPS data

Proceedings of the 3rd International Workshop on Location and the Web, 2010
In this paper we propose a new algorithm for finding the frequent routes that a user has in his daily routine, in our method we build a grid in which we map each of the GPS data points that belong to a certain sequence. (We consider that each sequence conforms a route) we then carry out an interpolation procedure that has a probabilistic basis and find
Norma Saiph Savage, Shoji Nishimura, Norma Elva Chávez, Xifeng Yan   +3 more
openaire   +1 more source

A systematic review on moving objects’ trajectory data and trajectory data warehouse modeling

Computer Science Review, 2023
Wided Oueslati, Sonia Tahri, Hela Limam, Jalel Akaichi   +3 more
openaire   +1 more source

Spatiotemporal Data: Trajectories

2018
Zhou, Xiaofang, Li, Lei
openaire   +4 more sources