The Yangtze River Delta (YRD) is one of the most developed regions in China. This also a flood-prone area where flood disasters are frequently experienced; situations between people–land nexus and people–water very complicated. Therefore, accurate assessment risk great significance to regional development. paper took YRD urban agglomeration as research case. driving force, pressure, state, impact response (DPSIR) conceptual framework was established analyze indexes disasters. random forest...

The coupling and coordination development of the environment economy (CC2E) is one most vital issues to sustainable development. This paper adopted model, projection pursuit algorithm, random forest model explore spatial-temporal evolution influencing factors CC2E in Yangtze River Delta from 2015 2019, respectively. results showed that: (1) degree (DCC) cities has risen primary intermediate coordination. (2) In spatial perspective, distribution DCC correlated with geographical location....

Water, energy and food are the basic resources for human survival development. The coordination development of water-energy-food (W-E-F) is great significance to promote regional sustainable In this study, Northwest China (Shaanxi, Gansu, Qinghai, Ningxia, Xinjiang) was selected as research case, an evaluation index system constructed assess vulnerability based on PSR model. Then, a coupled model cloud-matter element degree proposed. adopted evaluate level W-E-F system. employed calculate...

In this paper, theories, algorithms and properties of eigenvalues quaternion tensors via the t-product termed T-eigenvalues are explored. Firstly, we define T-eigenvalue provide an algorithm to compute right corresponding T-eigentensors, along with example illustrate efficiency our by comparing it other methods. We then study some inequalities related Hermitian tensors, providing upper lower bounds for sum a pair tensors. further generalize Weyl theorem from matrices third-order...

Tai Lake Basin, a key freshwater resource in eastern China, has garnered attention due to widespread cyanobacterial blooms. Effective water quality management is vital for the region’s sustainable development. Investigating seasonal variations of parameters (WQPs) Basin essential devising targeted strategies enhance quality. This study employs an interpretable machine learning model (XGBoost-SHAP) identify most important factors using daily monitoring WQP data from 2023 2024. Results...

Abstract Water, energy, food, and ecology are essential for human survival development. The Yangtze River Delta is one of the most important regions China's sustainable It great significance to study coupling coordinated development level water-energy-food-ecology in In this study, we establish (WEFE) coordination index system. Then, analyze degree (DCC) WEFE based on evaluation model projection pursuit model. results show that DCC shows obvious spatial-temporal characteristics. From...

In this study, a new optimized comprehensive drought index system (OCDIS) was developed based on pressure-state-response (PSR) and random forest (RF). Then the pressure, state, response, integrated agricultural risk were evaluated according to synthetic-weight variable fuzzy set (SW-VFS) model. Finally, countermeasures in terms of response discussed. The proposed has been implemented Qujing, Yunnan Province, China. results showed that 10 indices included OCDIS, four most important for...

A new model for risk assessment of agricultural drought based on information diffusion method and variable fuzzy sets (IDM-VFS) was proposed. In addition, an integrated index system established. the proposed model, IDM employed to calculate level classification standards, then VFS adopted assess dangerousness, sensitivity, vulnerability, comprehensive droughts. present study, Nanpan River Basin with model. The results showed that KaiYuan, ShiZong, QiuBei, ZhanYi have higher due water...

Nanjing city is taken as a case in this urban rainstorm disaster risk research. Using the data of meteorology and social-economy statistics area, paper selected ten indicators to establish assessment system from aspects vulnerability hazard-affected body, fragility disaster-pregnant environment, danger hazard factors. Multi-layer weighted principal component analysis (MLWPCA) an extension (PCA). The MLWPCA based on factor for division subsystem. Then PCA used analyze each subsystem...

Rainstorm disasters have had a serious impact on the sustainable development of society and economy. However, due to complexity rainstorm disasters, it is difficult measure importance each indicator. In this paper, disaster risk assessment framework was systematically proposed based system theory corresponding indicators established. Furthermore, genetic algorithm optimized projection pursuit XGBoost were coupled assess relative Finally, Yangtze River Delta taken as case study area. The...

A new model for risk assessment of drought based on projection pursuit optimized by immune evolutionary algorithm and information diffusion method (IEAPP-IDM) was proposed. Due to the fact that is a complex multicriteria multilevel problem, IEAPP-IDM can project multidimensional indicators samples into one-dimension scores; then, carried scores diffused levels; finally, disaster estimate obtained. In present study, Qujing employed assess with proposed model. The results showed Xuanwei...

Abstract This study establishes a market sharing mechanism for watershed ecological compensation between an upstream and downstream government based on the game-theoretical approach. It is found that, in this transboundary mechanism, encouraged to make more effort protect ecosystem. As result, market-sharing can bring Pareto improvements all stakeholders. Furthermore, influences of several key factors performance are investigated, which provides theoretical guidance establishing implementing...

With the rise of artificial intelligence and big data technologies, it is increasingly significant to apply these emerging technologies scientific decision-making in water conservancy project construction management face many problems process construction. Different from using traditional assessment methods for risk classification hazards, this paper integrates a priori attention constructs transformer prediction model based on sliding window, which deeply explores value hazards information,...

Abstract Improving water resource utilization efficiency is essential in alleviating the crisis of shortage and promoting sustainable development social economy. Based on data envelopment analysis (DEA) Malmquist index, agricultural, industrial, domestic Jiangsu Province from 2011 to 2020 are evaluated, respectively. The results show that DEA agriculture industrial use greater than while improvement agricultural larger industrial. Temporally, was an increasing trend 2020, technological...

Green port construction has a profound impact on China’s international climate commitment to carbon neutrality by 2050. To examine the emission reduction potential of 20 major ports in Yangtze River Delta cluster China, this study takes perspective environmental efficiency and employs dynamic exogenous variable DEA evaluation. The results show increasing Delta, rising from 0.5116 2013 0.7276 2019. Also, there are significant spatial differences efficiency. After considering variable, average...

With the rapid development of water conservancy engineering and infrastructure construction, there are many safety hazards in construction process engineering, so it is great significance to study potential process. In this context, paper proposes a task scenario-based association mining method for hydraulic hidden danger records. By analyzing transaction characteristics, traditional Apriori algorithm improved optimize pruning results generate rules. The research have been successfully...

Abstract Ecological compensation (EC) is essential to promote the coordinated and sustainable development of watershed. Firstly, synergetic index system watershed EC was proposed, which includes economic benefits, water conservation, pollution treatment, environmental supervision. Then, order degree subsystems calculated. Finally, level evaluated. Taking upstream (Ma'anshan) downstream (Nanjing) Chu River as case study area, results showed that: (1) From 2011 2020, between Ma'anshan Nanjing...

New product or technology innovation is always facing many uncontrollable factors, which lead to the uncertainty of success probability an project and its developing time. Multi-agent collaboration effective way improve reduce time project. In this paper, we employ knowledge sharing model formulate a differential game for multi-agent collaborative (MACI) mechanism under uncertainty. Firstly, equilibrium policy each agent obtained by applying optimal control theory. Secondly, observe that...