This paper investigates human mobility patterns in an urban taxi transportation system. This work focuses on predicting human mobility from discovering patterns of in the number of passenger pick-ups quantity （PUQ） ...This paper investigates human mobility patterns in an urban taxi transportation system. This work focuses on predicting human mobility from discovering patterns of in the number of passenger pick-ups quantity （PUQ） from urban hotspots. This paper proposes an improved ARIMA based prediction method to forecast the spatial-temporal variation of passengers in a hotspot. Evaluation with a large-scale real- world data set of 4 000 taxis＇ GPS traces over one year shows a prediction error of only 5.8%. We also explore the applica- tion of the pl^di^fioti approach to help drivers find their next passetlgerS, The sinatllation results using historical real-world data demonstrate that, with our guidance, drivers can reduce the time taken and distance travelled, to find their next pas- senger＋ by 37.1% and 6.4% respectively,展开更多
To study effects of traffic during daytime and other human activities, we conducted surveys on the migration of Tibetan antelope Pantholops hodgsoni along the Qinghai Tibet highway between Kunlun Mountain Pass to Wuda...To study effects of traffic during daytime and other human activities, we conducted surveys on the migration of Tibetan antelope Pantholops hodgsoni along the Qinghai Tibet highway between Kunlun Mountain Pass to Wudaoliang, using line transects (LT) from June to September in 2001 and 2002, Data were collected for 64 days with 17 days in 2001, and 47days in 2002 The Stationary Observation Method (SOM) was also adopted for the investigation of status of the disturbance from traffic when antelopes passing the highway and the traffic situation from August 6 to 28(6:30-19:00), 4 to 20(6:00-18:00) and from December 21 to 29(9:00-19:00) in 2002 The results showed that, the period of migration in 2002 was more prolonged than in 2001, and it took at least 45 min for each group to cross the highway, with success ratio of only 30 2%, and the traffic flow of summer daytime was 76/h, while the winter’s traffic flow was 29/h. Highway and rail traffic should be managed during daylight hours from June to August, to allow for the migration of the antelopes. Also conservation education and a further survey should be emphasized for the protection on the species.展开更多
文摘This paper investigates human mobility patterns in an urban taxi transportation system. This work focuses on predicting human mobility from discovering patterns of in the number of passenger pick-ups quantity （PUQ） from urban hotspots. This paper proposes an improved ARIMA based prediction method to forecast the spatial-temporal variation of passengers in a hotspot. Evaluation with a large-scale real- world data set of 4 000 taxis＇ GPS traces over one year shows a prediction error of only 5.8%. We also explore the applica- tion of the pl^di^fioti approach to help drivers find their next passetlgerS, The sinatllation results using historical real-world data demonstrate that, with our guidance, drivers can reduce the time taken and distance travelled, to find their next pas- senger＋ by 37.1% and 6.4% respectively,
文摘To study effects of traffic during daytime and other human activities, we conducted surveys on the migration of Tibetan antelope Pantholops hodgsoni along the Qinghai Tibet highway between Kunlun Mountain Pass to Wudaoliang, using line transects (LT) from June to September in 2001 and 2002, Data were collected for 64 days with 17 days in 2001, and 47days in 2002 The Stationary Observation Method (SOM) was also adopted for the investigation of status of the disturbance from traffic when antelopes passing the highway and the traffic situation from August 6 to 28(6:30-19:00), 4 to 20(6:00-18:00) and from December 21 to 29(9:00-19:00) in 2002 The results showed that, the period of migration in 2002 was more prolonged than in 2001, and it took at least 45 min for each group to cross the highway, with success ratio of only 30 2%, and the traffic flow of summer daytime was 76/h, while the winter’s traffic flow was 29/h. Highway and rail traffic should be managed during daylight hours from June to August, to allow for the migration of the antelopes. Also conservation education and a further survey should be emphasized for the protection on the species.
