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S-BAC is a cross-shard consensus protocol, which deals with cross-shard transactions based on communications among shards, resulting in large communication overhead and high delay. To solve this problem, this paper proposed an improved S-BAC, denoted as S-BAC+, which introduced the role of shard manager and reputation mechanism accordingly. More specifically, the shard manager took in charge of deal with cross-shard transactions, which reduced the communization cost. Furthermore, it introduced a reputation mechanism based on voting to decide which node could be appointed as the shard manager. Experiments show that S-BAC+ is more effective than S-BAC, in terms of communication overhead and delay, and transaction throughput. [ABSTRACT FROM AUTHOR]

Today, effective alleviation is urgently needed for the contradiction between the increasingly diversified demand and the unbalanced supply of social resources for old-age life. Based on the study of the planning of life circle of the elderly, including “food, housing, medicine, emotion, planning and system”, and obtains the weight of the indicators through Analytic Hierarchy Process method. Then, taking Gulou District as an example, ArcGIS technology is applied to carry out factor superposition analysis and quantitative research. The following conclusions and suggestions are drawn: 1) The situation presents a state-“excellent in the center and weak in the periphery” in Gulou district needs to be alleviated and full coverage of service equity, arrangement plan and the configuration of facilities calls for adjusting and optimizing; 2) The service level of facilities should be comprehensively improved under the “Six in One” elderly life circle system, which aims to make up for shortcomings;3) The renewal analysis of the elderly life circle system based on the community contributes to keeping pace with the times to build a harmonious “big family”. [ABSTRACT FROM AUTHOR]

Objectives: Sunlight pollution caused by glass curtain walls of buildings in urban environment has brought great threats to traffic safety, fire control and residents' health. At present, most researches on architecture sunlight pollution traditionally focus a local small range at specific construction based on simulation or measurement methods. We keep the way of three‑dimensional (3D) computation, dissimilarly integrates geographic resources to expand the perception range of city sunlight pollution brought by building glasses. Methods: The calculation technique of sunlight pollution builds 3D spatial relationship among road, building facade and sunlight in real urban environment, using deep‑learning image segmentation to extract glass curtain walls. Then, combined with glare evaluation model, we develop an innovative sunlight pollution model from perspective of drivers to evaluate the suitability for people. Results: Taking Shenzhen Fu‑ tian Center as an example, the multi‑level analyses of sunlight pollution are implemented by means of calculation under real time and real location, and path selection based on evaluation. Through these instances, the time sequence regularity, the spatial distribution characteristics and the path estimation of architecture sunlight pollution are revealed. Conclusions: The analyses retain space computation mode with innovations, fully utilize street view resources, and provide people the macroscopic concept, which indicates relative strength of building sunlight pollution. Additionally, the method ensures instantaneity of urban sunlight pollution acquisition and computation, to a certain extent covers shortages of current researches, and is further capable of reference evaluation in environment protection, accurate warnings and predictions of glare intensity for pedestrians and drivers. [ABSTRACT FROM AUTHOR]