Wireless sensor networks have been identified as one of the most important technologies for the 21 st century.Recent advances in micro sensor fabrication technology and wireless communication technology enable the pra...Wireless sensor networks have been identified as one of the most important technologies for the 21 st century.Recent advances in micro sensor fabrication technology and wireless communication technology enable the practical deployment of large-scale,low-power,inexpensive sensor networks.Such an approach offers an advantage over traditional sensing methods in many ways:large-scale,dense deployment not only extends spatial coverage and achieves higher resolution,but also increases the system's fault-tolerance and robustness.Moreover,the ad-hoc nature of wireless sensor networks makes them even more attractive for military and other risk-associated applications,such as environmental observation and habitat monitoring.展开更多
Recently, the use of ubiquitous sensor network technology has spread vastly. The ubiquitous sensor networks are widely de- ployed in factory auttxnation as they provide effective measuring solution for instruments. Th...Recently, the use of ubiquitous sensor network technology has spread vastly. The ubiquitous sensor networks are widely de- ployed in factory auttxnation as they provide effective measuring solution for instruments. The wired/wireless network module, which provides the interface to connect to the u-sensor network, is needed but there is no perfect standardization about the interface. In this situation, the interface compatibility between measuring instrument can be maintained using the IEEEI451 international standard. In this paper, the Wireless Transducer Interface Mcduie （WTIM） based on IEEE1451.5 was designed. It coxnects to the measuring instnmnt, like the muiti-meter, power meter, and etc., to support the RS232 interface. As these devices cannot connect to network without a mod- ule, we use the WTIM to help these devices connect to network sys- ton. Its ftmction was verified through the ubiquitous network connection and data transfer between monitoring PC and measuring instrument. This technology is expected to reduce cost in order to construct the wireless industry automation system using existing devices.展开更多
The increasing availability of ubiquitous sensor data on the built environment holds great potential for a new generation of travel and mobility research.Bluetooth technology,for example,is already vastly used in vehi...The increasing availability of ubiquitous sensor data on the built environment holds great potential for a new generation of travel and mobility research.Bluetooth technology,for example,is already vastly used in vehicular transportation management solutions and services.Current studies discuss the potential of this emerging technology for pedestrian mobility research,but it has yet to be examined in a large urban setting.One of the main problems is detecting pedestrians from Bluetooth records since their behavior and movement patterns share similarities with other urban transportation modes.This study aims to accurately detect pedestrians using a network of 65 Bluetooth detectors located in Tel-Aviv,Israel,which record on average over 60,000 unique daily Bluetooth Media-Access-Control addresses.We propose a detection methodology that includes system calibration,effective travel time calculation,and classification by velocity that takes into consideration the probability of vehicular traffic jams.An evaluation of the proposed methodology presents a promising pedestrian detection accuracy rate of 89%.We showcase the results of pedestrian traffic analysis,together with a discussion on the data analysis challenges and limitations.To the best of our knowledge,this work is the first to analyze pedestrian records detection from a Bluetooth network employed in a dynamic urban environment setting.展开更多
The progressive transition from digital to smart cities has become a reality in recent years.Studies on the fundamental concept of smart cities,along with their supporting techniques,have attracted unprecedented atten...The progressive transition from digital to smart cities has become a reality in recent years.Studies on the fundamental concept of smart cities,along with their supporting techniques,have attracted unprecedented attention.This study first discusses the concept of smart cities,where it is pointed out that the real city and the digital city can be integrated into a smart city by using ubiquitous sensor networks(USN)or the Internet of Things.More intelligent services for city management and public services can be provided in smart cities through massive and complex calculation,analysis,and data mining on cloud computing platforms.A smart city’s representative characteristics are summarized here to demonstrate that smart cities are superior for offering technical securities and intelligent services.Smart municipal supervision,smart transportation,smart environment monitoring,and smart tourism are used as examples to support the discussion.展开更多
文摘Wireless sensor networks have been identified as one of the most important technologies for the 21 st century.Recent advances in micro sensor fabrication technology and wireless communication technology enable the practical deployment of large-scale,low-power,inexpensive sensor networks.Such an approach offers an advantage over traditional sensing methods in many ways:large-scale,dense deployment not only extends spatial coverage and achieves higher resolution,but also increases the system's fault-tolerance and robustness.Moreover,the ad-hoc nature of wireless sensor networks makes them even more attractive for military and other risk-associated applications,such as environmental observation and habitat monitoring.
基金supported by the GRRC program of Gyeong-gi province:[GRRC Hanyang2009-B01,Building/Home USN Technology for Smart Grid]
文摘Recently, the use of ubiquitous sensor network technology has spread vastly. The ubiquitous sensor networks are widely de- ployed in factory auttxnation as they provide effective measuring solution for instruments. The wired/wireless network module, which provides the interface to connect to the u-sensor network, is needed but there is no perfect standardization about the interface. In this situation, the interface compatibility between measuring instrument can be maintained using the IEEEI451 international standard. In this paper, the Wireless Transducer Interface Mcduie （WTIM） based on IEEE1451.5 was designed. It coxnects to the measuring instnmnt, like the muiti-meter, power meter, and etc., to support the RS232 interface. As these devices cannot connect to network without a mod- ule, we use the WTIM to help these devices connect to network sys- ton. Its ftmction was verified through the ubiquitous network connection and data transfer between monitoring PC and measuring instrument. This technology is expected to reduce cost in order to construct the wireless industry automation system using existing devices.
文摘The increasing availability of ubiquitous sensor data on the built environment holds great potential for a new generation of travel and mobility research.Bluetooth technology,for example,is already vastly used in vehicular transportation management solutions and services.Current studies discuss the potential of this emerging technology for pedestrian mobility research,but it has yet to be examined in a large urban setting.One of the main problems is detecting pedestrians from Bluetooth records since their behavior and movement patterns share similarities with other urban transportation modes.This study aims to accurately detect pedestrians using a network of 65 Bluetooth detectors located in Tel-Aviv,Israel,which record on average over 60,000 unique daily Bluetooth Media-Access-Control addresses.We propose a detection methodology that includes system calibration,effective travel time calculation,and classification by velocity that takes into consideration the probability of vehicular traffic jams.An evaluation of the proposed methodology presents a promising pedestrian detection accuracy rate of 89%.We showcase the results of pedestrian traffic analysis,together with a discussion on the data analysis challenges and limitations.To the best of our knowledge,this work is the first to analyze pedestrian records detection from a Bluetooth network employed in a dynamic urban environment setting.
基金This study is sponsored by the National Basic Research Program of China(No.2010CB731800)National Natural Science Foundation of China(Nos.61172174 and 10978003)National Science&Technology Specific Projects(Nos.2012YQ16018505 and 2013BAH42F03).
文摘The progressive transition from digital to smart cities has become a reality in recent years.Studies on the fundamental concept of smart cities,along with their supporting techniques,have attracted unprecedented attention.This study first discusses the concept of smart cities,where it is pointed out that the real city and the digital city can be integrated into a smart city by using ubiquitous sensor networks(USN)or the Internet of Things.More intelligent services for city management and public services can be provided in smart cities through massive and complex calculation,analysis,and data mining on cloud computing platforms.A smart city’s representative characteristics are summarized here to demonstrate that smart cities are superior for offering technical securities and intelligent services.Smart municipal supervision,smart transportation,smart environment monitoring,and smart tourism are used as examples to support the discussion.
