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[期刊论文] 作者：BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
The location determination technology based on simple delay evaluations or GPS is not accurate enough or even impossible in urban and indoor environments due to...
[期刊论文] 作者：BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
Location based services is promising due to its novel working style and contents. A software platform is proposed to provide application programs of typical loc...
[期刊论文] 作者：BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
Location technology is the key part of location based service. Different technologies have different accuracy, modifying to network and cost of operating. Also...
[期刊论文] 作者：BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
The location determination technology based on simple delay evaluations or GPS is not accurate enough or even impossible in urban and indoor environments due to the multi path propagation.To enhance...
[期刊论文] 作者：BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
With the rapid advance of wireless communication, tracking the positions of the moving objects is becoming increasingly feasible and necessary. Because a large number of people use mobile phones, we...
[期刊论文] 作者：LEE Chung ho,BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
R Tree is a good structure for spatial searching. But in this indexing structure, either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random....
[期刊论文] 作者：LEE Chung ho ,BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
In moving object database, the moving objects current position must be kept in memory, also to the trajectory, in some case, as same as the future. But the current existing indexes such as SEB tree,...
An efficient selectivity estimation method for spatial query optimization with topological relations
[期刊论文] 作者：CHUNG Warn ill,CHOI Jun ho,BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
Many commercial database systems maintain histograms to summarize the contents of relations and permit the efficient estimation of query result sizes and the access plan cost. In spatial database syst...
[期刊论文] 作者：YOU Byeong seob ,KIM Myung keun ,ZOU Yong gui ,BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
Shared nothing spatial database cluster system provides high availability since a replicated node can continue service even if any node in cluster system was crashed. However if the failed node would...
A recovery method using recently updated record information in shared-nothing spatial database clust
[期刊论文] 作者：JEONG Myeong ho,JANG Yong ll,PARK Soon young,BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
A shared nothing spatial database cluster is system that provides continuous service even if some system failure happens in any node. So, an efficient recovery of system failure is very important. Ge...
[期刊论文] 作者：JANG Yong ll ,LEE Chung ho ,LEE Jae dong ,BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on line scaling without interrupting service. To support more...
[期刊论文] 作者：KIM Ho seok,KIM Hee taek,KIM Myung keun,BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
The search operation of spatial data was a principal operation in existent spatial database management system, but the update operation of spatial data such as tracking are occurring frequently in the...
Tracking data management using topology of moving object database system for moving object constrain
[期刊论文] 作者：LEE Hyun jin,SIM Tai jung, JANG Yong ll,PARK Soon young,BAE Hae young,
来源：重庆邮电学院学报(自然科学版) 年份：2004
Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS(Location Based Service) is arising. To provide location based service, tracking data s...
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