| Presentation | 2007-09-18 Real-time Imputation Method for Sparse Floating Car Data Tomoaki HIRUTA, Masatoshi KUMAGAI, Kenji SUZUKI, Takayoshi YOKOTA, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper discusses real-time imputation method for sparse floating car data with feature space which has multiple bases which express correlation of a lot of links. This method consists of off-line and on-line process: determination of feature space from past floating car history (off-line process); feature space projection of current floating data and estimation of missing data performed by inverse projection from feature space (on-line process). In this paper, in the off-line process, we reveal relation between feature space and missing rate of floating car data, and feature space and accumulation time of past floating car data. And we show that feature space can be determined with enough accumulation time even under sparse floating car data. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Floating Car / Missing Data / Imputation / Feature Space Projection |
| Paper # | ITS2007-20 |
| Date of Issue |
| Conference Information | |
| Committee | ITS |
|---|---|
| Conference Date | 2007/9/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Intelligent Transport Systems Technology (ITS) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Real-time Imputation Method for Sparse Floating Car Data |
| Sub Title (in English) | |
| Keyword(1) | Floating Car |
| Keyword(2) | Missing Data |
| Keyword(3) | Imputation |
| Keyword(4) | Feature Space Projection |
| 1st Author's Name | Tomoaki HIRUTA |
| 1st Author's Affiliation | Hitachi Research Lab., Hitachi Ltd.() |
| 2nd Author's Name | Masatoshi KUMAGAI |
| 2nd Author's Affiliation | Hitachi Research Lab., Hitachi Ltd. |
| 3rd Author's Name | Kenji SUZUKI |
| 3rd Author's Affiliation | Car Information Systems Div., Hitachi Ltd. |
| 4th Author's Name | Takayoshi YOKOTA |
| 4th Author's Affiliation | Hitachi Research Lab., Hitachi Ltd. |
| Date | 2007-09-18 |
| Paper # | ITS2007-20 |
| Volume (vol) | vol.107 |
| Number (no) | 215 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |