| Paper Abstract and Keywords |
| Presentation |
2007-09-18 15:30
Real-Time Imputation Method For Sparse Floating Car Data
Tomoaki Hiruta, Masatoshi Kumagai, Kenji Suzuki, Takayoshi Yokota (Hitachi Ltd.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (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) |
| (in English) |
Floating Car / Missing Data / Imputation / Feature Space Projection / / / / |
| Reference Info. |
IEICE Tech. Rep., vol. 107, pp. 21-26, Sept. 2007. |
| Paper # |
|
| Date of Issue |
2007-09-11 (ITS) |
| ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
| Download PDF |
|
| Conference Information |
| Committee |
ITS IPSJ-ITS IEE-ITS |
| Conference Date |
2007-09-18 - 2007-09-19 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Institute of Industrial Science, University of Tokyo |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Measurement Techniques for Vehicular Traffic, etc. |
| Paper Information |
| Registration To |
IPSJ-ITS |
| Conference Code |
2007-09-ITS-IPSJ-ITS-IEE-ITS |
| Language |
Japanese |
| 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 |
| Keyword(5) |
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| Keyword(6) |
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| Keyword(7) |
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| Keyword(8) |
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| 1st Author's Name |
Tomoaki Hiruta |
| 1st Author's Affiliation |
Hitachi Research Laboratory, Hitachi Ltd. (Hitachi Ltd.) |
| 2nd Author's Name |
Masatoshi Kumagai |
| 2nd Author's Affiliation |
Hitachi Research Laboratory, Hitachi Ltd. (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 Laboratory, Hitachi Ltd. (Hitachi Ltd.) |
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| Speaker |
Author-1 |
| Date Time |
2007-09-18 15:30:00 |
| Presentation Time |
30 minutes |
| Registration for |
IPSJ-ITS |
| Paper # |
ITS2007-20 |
| Volume (vol) |
vol.107 |
| Number (no) |
no.215 |
| Page |
pp.21-26 |
| #Pages |
6 |
| Date of Issue |
2007-09-11 (ITS) |