IoT-Based Cost Saving Offloading System for Cellular Networks MIX-RS:A Multi-Indexing System Based on HDFS for Remote Sensing Data Storage Picture Quality Assessment-Based on Rate Control for Variable Bandwidth Networks Software System Evolution Analysis Method Based on Algebraic Topology EVchain: An Anonymous Blockchain-Based System for Charging–Connected Electric Vehicles An Axiom System of Probabilistic Mu-Calculus Propagation History Ranking in Social Networks:A Causality-Based Approach Optimization-Based Fragmental Transmission Method for Video Data in Opportunistic Networks Personalized Real-Time Movie Recommendation System:Practical Prototype and Evaluation China's Land System and Its Extraordinary Infrastructure Development