The scientific construction of the indicator system and the objective evaluation method that apply to the value of water conservancy heritage are of great significance to the promotion and development of water culture and water conservancy heritage conservation. This study constructs an index system for water conservancy heritage value assessment from seven first-level indexes, such as engineering value, economic value, social value, ecological value, artistic value, innovative value and heritage value, builds a fuzzy comprehensive evaluation model based on expert knowledge and public perception and carries out empirical evidence with the example of China's Red Flag Canal. The results show that the overall value of the Red Flag Canal was 94.68 points, which reached a high level. The result is consistent with that the Red Flag Canal was successfully declared as the national water conservancy heritage, thus verifying the scientificity and rationality of the index system and the evaluation method constructed by this study.
The promotion of water-saving products is one of the vital ways to implement water conservation action, and advertising is a significant way to promote water-saving products. Taking the two-level Supply Chain consisting of a leading manufacturer and a retailer as an example and considering the advertising cost-sharing ratio of the two, as well as the government's R&D subsidies to manufacturers and product subsidies to consumers, this study establishes differential game models in three cases, that is, non-cooperative contract without cost sharing, cooperative contract with cost sharing, and collaborative cooperation contract. Also, numerical simulation is adopted to analyze the sensitivity of important parameters. The results show that the product goodwill and market demand for water-saving products can achieve Pareto optimality under the collaborative cooperation contract. In addition, the cooperative contract with cost sharing can realize Pareto improvement of the optimal benefit of the Supply Chain under certain conditions. Moreover, in the absence of the government's R&D subsidies, the overall benefits can achieve Pareto optimality under the collaborative cooperation contract. This study provides theoretical guidance and reference for the advertising cooperation strategy for the main bodies in the Supply Chain.
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