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Yanqian Lou, Qingtai Qiu, Mingtai Zhang, Zhonglun Feng and Jie Dong
Water resource spatial equilibrium evaluations provide the bases for water resource utilization and allocation. To analyze the regional spatial water resource matching balance, this study constructed a water resource spatial matching model based on the G...
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Boris Melnikov
Pág. 1 - 12
In some previous publications, we investigated the properties of a special binary relation, which was sometimes called the equivalence relation at infinity. For a pair of finite languages, the equality of infinite iterations of these langu...
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Boris Melnikov
Pág. 1 - 8
Quite briefly, the subject of this paper can be formulated as follows: in the previously considered infinite iterative morphism trees, we combine equivalent vertices, in fact, obtaining a deterministic finite automaton; after that, we investigate some pr...
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Boris Melnikov
Pág. 5 - 13
Quite briefly, the subject of this paper can be formulated as follows: in the previously considered infinite iterative morphism trees, we combine equivalent states, obtaining in fact a deterministic finite automaton; after that, we in...
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Sergey Kurapov,Maxim Davidovsky
Pág. 1 - 8
In general, a universal algorithm for testing a pair of graphs G and H for isomorphism exists. It is grounded on the fact that the rows and the corresponding columns of the adjacency matrix of the graph G can be rearranged until it turns into another, eq...
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Qiuyan Liu, Mingwu Wang, Xiao Wang, Fengqiang Shen and Juliang Jin
The evaluation of land eco-security is challenging because it is involved with various uncertainty factors. Although the normal cloud model provides an idea for dealing with the randomness and fuzziness of indicators for the evaluation of land eco-securi...
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Baohui Men and Huanlong Liu
Beijing-Tianjin-Hebei is an area with insufficient per capita water resources. This study evaluates the current status and development trend of sustainable use of water resources in the region, and identifies specific factors influencing sustainable deve...
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Baohui Men, Huanlong Liu, Wei Tian and Haoyue Liu
Water resources are not only the essence of human life, but also an important prerequisite which ensures the economic and social development of a country or city. Due to chronically global overexploitation, water crises have started to emerge. China, for...
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