以及一個從建築CAD平面圖中提取這些信息的自動化過程。This thesis describes the design and implementation of CricketNav錛an indoor mobile navigation system using the Cricket indoor location sensinginfrastructure developed at the MIT Laboratory for Computer Science as part ofProject Oxygen. CricketNav navigates users to the desired destination bydisplaying a navigation arrow on a map. Both the direction and the position ofthe navigation arrow are updated in real-time as CricketNav steers the users througha dynamically computed path. To support CricketNav錛 we developed a modular dataprocessing architecture for the Cricket location system錛 and an API foraccessing location information. We implemented a least-squares positionestimation algorithm in Cricket and evaluated its performance. We alsodeveloped a rich and compact representation of spatial information錛 and anautomated process to extract this information from architectural CADfloorplans. 1. 引言2. Cricket定位3. 空間信息服務4. CricketNav設計5. 未來工作展望與結論附錄A CricketServer 1.0協議附錄B 空間信息地圖文件格式更多精彩文章請關注公眾號：DOI:10.1016/j.jallcom.2020.154999基于氣敏材料的過渡金屬氧化物的感測性能不足，限制了其實際應用。無機-有機雜化納米材料是目前最先進的高靈敏度氣體傳感器材料。本文將六氟異丙醇（HFIP）接枝到三氧化鎢（WO3）中空納米纖維（HNFs）上，用于檢測氫鍵作用下的甲基膦酸二甲酯（DMMP，sarin試劑模擬物）。此外，還採用還原氧化石墨烯（rGO）納米片作為基底層，以避免晶界中毒和提高電荷遷移率。另外，
