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This study is to analyze the relationship between human settlements system and water resources, select the water resource's carrying capacity index, and construct a system based on the human settlements system theory for the water resource's carrying capacity index. The index weight is determined by the analytic hierarchy process, and the set pair analysis method is used to calculate the connection number and evaluation grade of samples in Beijing, Tianjin, and Hebei Province from 2016 to 2019. The results show that there are differences in water resources carrying capacity from the perspective of human settlements in Beijing, Tianjin, and Hebei Province, and the changing trend of water resources carrying capacity in the three regions is different. The introduction of human settlement theory into the construction of water resource's carrying capacity index system can better reflect the carrying capacity of water resources to human society and can provide a new perspective for other related research in the future. [ABSTRACT FROM AUTHOR]

Abstract: In this paper, the college students in Beijing as the research object, 569 Beijing college students are involved in the questionnaire survey about the online shopping problem. Research index involves the group characteristics, website category, product category, payment form, logistics distribution and rights complaints of network shopping. Based on the statistical analysis of feedback data, it is shown that 76% of Beijing college students have had experience of online shopping, among which the ratio between boys and girls is 79:73. Most of the online shopping commodities belong to the category of sportswear and stationery. 85% of the students will be influenced by the evaluation and assessment from online shops to make consumptions. In addition, the survey also found that University students are dissatisfied with the logistics related to online shopping and the corresponding rights defense, which should be greatly strengthened. [Copyright &y& Elsevier]

High level waste (HLW) produced from reprocessing of the spent nuclear fuel still contains actinides, 90Sr, 137Cs, etc., which presents a significant hazard to the environment. Two simplified TRPO processes for the partitioning of HLW were developed with N, N'-dimethyl-3-oxa-glutaramic acid (DMOGA) as the stripping agent at the Institute of Nuclear and New Energy Technology (INET), Tsinghua University, China. The cold pilot plant tests of two simplified TRPO processes were carried out with the simulated HLW respectively, where 70-mm-dia centrifugal contactors were used in the stripping sections of two simplified TRPO processes for the removal of actinides in the loaded 30% TRPO-kerosene. The test results showed that 99.9% of the Nd and 99.9% of the Zr were stripped respectively, and the organic phase was recycled after being stripped and scrubbed. During the pilot plant tests, all of the 70-mm-dia centrifugal contactors were stable, working continuously with no stage failure or interruption in operation. All of the results demonstrate that these centrifugal contactors are promising for the stripping sections of two simplified TRPO processes. [ABSTRACT FROM AUTHOR]