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Implicit correlations exist between multi-source geospatial data, the association relation can’t be displayed intuitively and retrieved effectively, which leads to the difficulty in data utilization and data sharing. Aimed at this situation, association relation topic maps is constructed using topic map tools Ontopia in this article. Besides, to increase the efficiency of building topic map, the automatic generation algorithm of association relation topic map which based on C# is proposed. The result of experiment shows that the association relation topic map can be constructed correctly by using Ontopia tools and automatic generation algorithm.

Nowadays, the air pollution of China is more and more serious, especially in Jing-Jin-Ji region. The improper energy consumption structure and the pollutants emission of coal industry chain are the main cause of the air pollution. In this study, based on the Energy Balance Tables of Beijing, Tianjin and Hebei in 2012, we used the model of inter-regional transportation, proposed a Regional Coal Industry Chain Balance Table, clarified the material/energy flows, and accounted the energy utilization efficiency in Jing-Jin-Ji region. It can help to realize the optimal balance of pollutant emissions control and energy supply, which is scientifically innovative.

Emergy evaluations at the provincial level provide unique insight into the resource basis of economic organization and the sustainability of ecological and economic system. Present evaluations towards the sustainable development among provinces in China mainly from the extra representative indexes, lacking an internal analysis of mechanism. The existing framework for emergy analysis at the national scale is well-defined with tables for quantifying and aggregating system inputs and computing indices to summarize condition. Thus, an overall emergy evaluation containing data from every province in China is highly needed. Baesd on National Emergy Accounting Database (NEAD), an emergy-based provincial framework was proposed including five modules: renewable flows, internal transformations, indigenous nonrenewable extraction, imports and exports. However, the processes of gathering raw data necessary for tabular synthesis and applying consistent energy conversions and unit emergy values for translating physical flows to emergy units, needs to be re-standardized on a provincial scale. In addition, inconsistencies among data sources at the provincial level can create problems on comparative analysis between provinces. Through exploring new methods in formalizing data sources and re-building the accounting framework, we will develop a standardized national emergy database containing the primary data, energy conversion ratios and unit emergy values needed to calculate provincial flows for recent decades for 34 provinces and regions and municipalities to provide a powerful and credible comparative provincial emergy analysis in China. Analysis results will be ranked in order to find the most eco-friendly provinces as well as the most substantial development patterns. According to the states of sustainability of 34 provinces and regions, the spatial analysis will be conducted. With the support of data over the years, the dynamic evolution mechanism will be discussed to summary the general trends.

In this paper, a multi-layered terahertz metamaterial has been proposed, which consisted of dual-layered substrate and three 6-shaped meta-layered. Numerical results reveal that the structure realizes broadband asymmetric transmission of linearly polarized wave. In particular, this structure realizes a maximum of 0.95 for asymmetric transmission at 6.7THz. Based on the electric fields, we have analyzed the wave conversion of linearly polarized wave and the mechanism of asymmetric transmission effect.