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Urban land use information is critical to urban planning, but the increasing complexity of urban systems makes the accurate classification of land use extremely challenging. Human activity features extracted from big data have been used for land use classification, and fusing different features can help improve the classification. In this paper, we propose a framework to integrate multiple human activity features for land use classification. Features were fused by constructing a membership matrix reflecting the fuzzy relationship between features and land use types using the fuzzy c-means (FCM) clustering method. The classification results were obtained by the fuzzy comprehensive evaluation (FCE) method, which regards the membership matrix as the fuzzy evaluation matrix. This framework was applied to a case study using taxi trajectory data from Nanjing, and the outflow, inflow, net flow and net flow ratio features were extracted. A series of experiments demonstrated that the proposed framework can effectively fuse different features and increase the accuracy of land use classification. The classification accuracy achieved 0.858 (Kappa = 0.810) when the four features were fused for land use classification.

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Cable tension is one of the important indexes of cable integrity as well as bridge stability and can be measured by various tension measurement methods. Parallel strand cables are special in structure, so the cable force measurement is more complex and difficult than other types of cables. In order to evaluate the common measurement methods for parallel strand cables, based on the Tongling Yangtze river road-rail bridge, the monitoring data during constructions were collected for statistical analysis. This paper summarized the common measurement methods for parallel strand cables, compared the test data form different measurement methods and in different construction stages. The results show the lift-off method assisted by the vibration wire load cell method can ensure force uniformity, the difference of forces measured by the vibration frequency method, the load cell method and the lift-off method is less than 5%, which can basically meet the constructions control requirement of cable force. This paper offer good reference value to other similar parallel strand cable stayed bridges.