Ultra-Wide Bandwidth(UWB)localization based on time of arrival(TOA)and angle of arrival(AOA)has attracted increasing interest owing to its high accuracy and low cost.However,existing localization methods often fail to...Ultra-Wide Bandwidth(UWB)localization based on time of arrival(TOA)and angle of arrival(AOA)has attracted increasing interest owing to its high accuracy and low cost.However,existing localization methods often fail to achieve satisfactory accuracy in realistic environments due to multipath effects and non-line-of-sight(NLOS)propagation.In this paper,we propose a passive anchor assisted localization(PAAL)scheme,where the active anchor obtains TOA/AOA measurements to the agent while the passive anchors capture the signals from the active anchor and agent.The proposed method fully exploits the time-difference-of-arrival(TDOA)information from the measurements at the passive anchors to complement single-anchor joint TOA/AOA localization.The performance limits of the PAAL system are derived as a benchmark via the information inequality.Moreover,we implement the PAAL system on a low-cost UWB platform,which can achieve 20 cm localization accuracy in NLOS environments.展开更多
In early childhood education it is important to determine a child＇s ability or attitude towards different subjects Training and/or education geared towards these tendencies will not only ensure a more healthy future ...In early childhood education it is important to determine a child＇s ability or attitude towards different subjects Training and/or education geared towards these tendencies will not only ensure a more healthy future choice in education for the child but furthermore will enable the child to have a happier educational atmosphere in early childhood. Music education/training in early childhood is considered to be very important in early years. Music education/training, in the correct and proper context using tangible and feasible teaching techniques not only improves and develops a child＇s musical skills but also helps develop his/her personality. Two people who shared this view were Zolt^n Kod^ly and Shinichi Suzuki. Suzuki positively affected the educational systems worldwide with his approach to violin teaching and his ideas on early childhood pedagogy. Choosing between the Suzuki violin teaching methodology and the traditional violin teaching methodology is a personal decision. This article tries to objectively elaborate on different aspects of Suzuki and traditional violin teaching methodologies. Each methodology has its pros and cons and knowing what these are will help individuals to make a more educated choice.展开更多
文摘Ultra-Wide Bandwidth(UWB)localization based on time of arrival(TOA)and angle of arrival(AOA)has attracted increasing interest owing to its high accuracy and low cost.However,existing localization methods often fail to achieve satisfactory accuracy in realistic environments due to multipath effects and non-line-of-sight(NLOS)propagation.In this paper,we propose a passive anchor assisted localization(PAAL)scheme,where the active anchor obtains TOA/AOA measurements to the agent while the passive anchors capture the signals from the active anchor and agent.The proposed method fully exploits the time-difference-of-arrival(TDOA)information from the measurements at the passive anchors to complement single-anchor joint TOA/AOA localization.The performance limits of the PAAL system are derived as a benchmark via the information inequality.Moreover,we implement the PAAL system on a low-cost UWB platform,which can achieve 20 cm localization accuracy in NLOS environments.
文摘In early childhood education it is important to determine a child＇s ability or attitude towards different subjects Training and/or education geared towards these tendencies will not only ensure a more healthy future choice in education for the child but furthermore will enable the child to have a happier educational atmosphere in early childhood. Music education/training in early childhood is considered to be very important in early years. Music education/training, in the correct and proper context using tangible and feasible teaching techniques not only improves and develops a child＇s musical skills but also helps develop his/her personality. Two people who shared this view were Zolt^n Kod^ly and Shinichi Suzuki. Suzuki positively affected the educational systems worldwide with his approach to violin teaching and his ideas on early childhood pedagogy. Choosing between the Suzuki violin teaching methodology and the traditional violin teaching methodology is a personal decision. This article tries to objectively elaborate on different aspects of Suzuki and traditional violin teaching methodologies. Each methodology has its pros and cons and knowing what these are will help individuals to make a more educated choice.
