In typical Wi-Fi based indoor positioning systems employing fingerprint model,plentiful fingerprints need to be trained by trained experts or technician,which extends labor costs and restricts their promotion.In this ...In typical Wi-Fi based indoor positioning systems employing fingerprint model,plentiful fingerprints need to be trained by trained experts or technician,which extends labor costs and restricts their promotion.In this paper,a novel approach based on crowd paths to solve this problem is presented,which collects and constructs automatically fingerprints database for anonymous buildings through common crowd customers.However,the accuracy degradation problem may be introduced as crowd customers are not professional trained and equipped.Therefore,we define two concepts:fixed landmark and hint landmark,to rectify the fingerprint database in the practical system,in which common corridor crossing points serve as fixed landmark and cross point among different crowd paths serve as hint landmark.Machinelearning techniques are utilized for short range approximation around fixed landmarks and fuzzy logic decision technology is applied for searching hint landmarks in crowd traces space.Besides,the particle filter algorithm is also introduced to smooth the sample points in crowd paths.We implemented the approach on off-the-shelf smartphones and evaluate the performance.Experimental results indicate that the approach can availably construct WiFi fingerprint database without reduce the localization accuracy.展开更多
This article echoes Kenneth Frampton’s critical regionalism to address maintaining the values of the past into the present.For Frampton,architecture design is regionally infused due to essentially dealing with“speci...This article echoes Kenneth Frampton’s critical regionalism to address maintaining the values of the past into the present.For Frampton,architecture design is regionally infused due to essentially dealing with“specificity and locality”,however,remains reluctant to adopt a“universal technology”.A Masdar City’s design represents a valuable case due to casting light on the complexity embedded in intertwining the modernist technologies and a regional architecture.The case study’s analyses cited here suggest that the design of the present evolves from this complexity witnessing a deviation from a“universal technology”and a local architecture.A vernacular style of architecture has been blamed because it stitches together the“globe”and the“local”.A universal technology has been also witnessed here which yields support for the vernacular approaches embedded in a traditional architecture.What Frampton’s critical regionalism appears to overlook are the vernacular approaches that in the analysis of this article embrace a model of the design principles for the“tectonics”to be realised.The key argument brought forward in this article concerns Frampton’s critical regionalism that yet lacks a realistic approach to produce a sense within a local context,thereby needing in its theory to neatly twist the vernacular approaches with a critical regionalism’s synthesis.展开更多
基金partially sponsored by National Key Project of China (No.2012ZX03001013-003)
文摘In typical Wi-Fi based indoor positioning systems employing fingerprint model,plentiful fingerprints need to be trained by trained experts or technician,which extends labor costs and restricts their promotion.In this paper,a novel approach based on crowd paths to solve this problem is presented,which collects and constructs automatically fingerprints database for anonymous buildings through common crowd customers.However,the accuracy degradation problem may be introduced as crowd customers are not professional trained and equipped.Therefore,we define two concepts:fixed landmark and hint landmark,to rectify the fingerprint database in the practical system,in which common corridor crossing points serve as fixed landmark and cross point among different crowd paths serve as hint landmark.Machinelearning techniques are utilized for short range approximation around fixed landmarks and fuzzy logic decision technology is applied for searching hint landmarks in crowd traces space.Besides,the particle filter algorithm is also introduced to smooth the sample points in crowd paths.We implemented the approach on off-the-shelf smartphones and evaluate the performance.Experimental results indicate that the approach can availably construct WiFi fingerprint database without reduce the localization accuracy.
文摘This article echoes Kenneth Frampton’s critical regionalism to address maintaining the values of the past into the present.For Frampton,architecture design is regionally infused due to essentially dealing with“specificity and locality”,however,remains reluctant to adopt a“universal technology”.A Masdar City’s design represents a valuable case due to casting light on the complexity embedded in intertwining the modernist technologies and a regional architecture.The case study’s analyses cited here suggest that the design of the present evolves from this complexity witnessing a deviation from a“universal technology”and a local architecture.A vernacular style of architecture has been blamed because it stitches together the“globe”and the“local”.A universal technology has been also witnessed here which yields support for the vernacular approaches embedded in a traditional architecture.What Frampton’s critical regionalism appears to overlook are the vernacular approaches that in the analysis of this article embrace a model of the design principles for the“tectonics”to be realised.The key argument brought forward in this article concerns Frampton’s critical regionalism that yet lacks a realistic approach to produce a sense within a local context,thereby needing in its theory to neatly twist the vernacular approaches with a critical regionalism’s synthesis.
