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In view of multi-agent system's ability to simulate complex spatial system, from the view of combining “top-down” and “bottom-up” decision-making behaviors, a spatiotemporal dynamical urban sprawl simulation model using multi-agent system was developed. In the model, “top-down” macro land use planning behaviors implemented by macro agents and “bottom-up” micro land use spatial appeal behaviors autonomously...
Glacier area changes in the Qangtang Plateau are analyzed during 1970–2000 using air photos, relevant photogrammetric maps and satellite images based on the multi-temporal grid method. The results indicate that the melting of glaciers accelerated, only a few of glaciers in an advancing state during 1970–2000 in the whole Qangtang Plateau. However, the glaciers seemed still more stable in the study...
In this paper, an enhanced sum of absolute integer transform difference (ESAITD) cost function with rate predictor "sum of non-zero coefficient frequencies" from CAVLC-based rate estimation is proposed for Intra_4x4 mode decision in H.264/AVC. This rate predictor is using simple but significant parameter to approximate the total encoded bitrate accurately. Experimental results show that...
In this paper, a novel weighted cross prediction (WCP) mode is proposed to replace DC mode in Intra_4times4 prediction of H.264/AVC. In the proposed scheme, the upper right part of one 4times4 block mainly employs vertical prediction while the lower left part mainly uses horizontal prediction, predicting both in vertical and horizontal directions in one block. This scheme uses simple prediction equations...
Parametric studies of facade designs for naturally ventilated residential buildings in Singapore were carried out to optimize facade designs for better indoor thermal comfort and energy saving. Two criteria regarding indoor thermal comfort for naturally ventilated residential buildings are used in this study. To avoid the perception of thermal asymmetry, temperature difference between mean radiant...
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