Smart transition pathways and development incentive mechanism of China's smart community elderly care industry under market dominance: Considering a multi-subjective behavior game.

Against the backdrop of an aging population, China is actively experimenting with an innovative elderly care model, so smart community elderly care has recently received widespread attention. However, the results of the implementation of the model have not yet met the expectation due to the variety of interests among the relevant participants. In this study, we identified the most core stakeholders in smart community elderly care, developed a four-party evolutionary game model including local governments, communities, service supply enterprises and households with elderly members. By applying the system dynamics method, we simulate the evolutionary paths and explore the complex interactions at the multiparticipant level in order to facilitate the transition of community elderly care services from traditional to smart, and then propose managerial insights for accelerating the construction of smart community elderly care. The results suggest that: (1) the four players in the game influence each other and are intimately related, and the benign interaction between them will further stimulate the vitality of the smart community elderly care industry; (2) appropriate improvement in policy support will strongly promote smart community elderly care, and the incentive effect on the demand side (households with elderly members) is more significant; (3) when households' preference for smart services increases, and the perceived value to communities and enterprises reaches a certain threshold, communities and enterprises will actively adopt smart solution and technology as well as develop stable portfolio strategy; (4) measures such as simultaneously increasing the level of smart and resource synergy will promote the system evolution toward smart services, and the system is more sensitive to the internal behavior of the enterprise than the external behavior between community and enterprise.

Evolutionary game of stakeholders' behavioral strategies in wetland ecosystems from the vulnerability perspective.

Wetland ecosystems have been seriously degraded by human activities and natural factors, and its restoration and coordinated development depend on long-term effective cooperation between the government and investors and providers. From the perspective of vulnerability of wetland ecosystem construction, this paper takes the government and investors, providers as the research object and propose a wetland ecosystem cooperation network, the article considers the "Matthew effect" of network connection and relationship cost, and uses the method of the evolutionary game on complex networks to construct the cooperative game model of wetland ecosystems. This research finds that (1) the vulnerability of wetland ecosystem varies greatly in different development stages, especially when the government subsidy coefficient for providers is reduced to 0.3, the vulnerability index is instead smaller.(2) The cooperative strategy adopted by investors can produce synergistic effect, which plays a major role in the healthy function of wetland ecosystem. (3) When the government subsidy coefficient for investors reaches 0.8, wetland ecosystem vulnerability shows a significant downward trend; when the provider loss coefficient reaches 0.8, wetland ecosystem vulnerability is significantly reduced and system stability is significantly enhanced. Thus, when the government actively promotes cooperation by adopting appropriate subsidies and regulation for investors and providers, the willingness of investors and providers to cooperate rapidly converges to 1, wetland ecosystem in vulnerability is at the lowest level. Finally, the findings combined with the numerical simulation analysis indicates that the importance of investors cooperating with the government in taking cooperative strategies actively, showing that stakeholder behavioral strategies can improve wetland ecosystem vulnerability. This paper provides a theoretical basis for the cooperation of wetland ecosystem stakeholders and a new direction for effectively reducing the vulnerability of wetland ecosystems and building efficient and benign wetland ecosystems in practice, which is of far-reaching significance for promoting wetland conservation management and an important reference value for wetland conservation planning, governance and improving the level of wetland conservation management.

Construction of Ultrathin S-Scheme Heterojunctions of Single Ni Atom Immobilized Ti-MOF and BiVO4 for CO2 Photoconversion of nearly 100% to CO by Pure Water.

To rationally design single-atom metal-organic framework (MOF)-involving photocatalysts remains an ongoing challenge for efficient CO2 conversion. Here, cuppy microstructures, consisting of a Ti(IV)-oxo node and three linked carboxylic moieties, in the single-coordination-layer Ti2 (H2 dobdc)3 MOF (NTU-9) are exploited to immobilize abundant single Ni(II) sites (Ni@MOF). The coupling of Ni@MOF with BiVO4 (BVO) nanosheets by H-bonding-induced assembly process obtains wide-spectrum 2D heterojunctions. The optimal heterojunction exhibits competitive performance and enables around 66-fold CO2 conversion of that for BVO nanoparticles by pure water, with nearly 100% CO selectivity. The exceptional photoactivity is attributed to favorable S-scheme charge transfer from BVO to MOF then to single Ni(II) sites. Noteworthily, single Ni(II) sites anchored by the Ti(IV)-oxo node and vicinal carboxylic moieties serving as a unique local microenvironment (LME) are found to synergistically catalyze CO2 conversion. Specifically, the hydroxyl groups of carboxylic moieties can form H-bonds with CO2 to promote its adsorption on single Ni(II) sites, and also can provide accessible protons to facilitate H-assisted CO2 reduction. Moreover, the CO desorption and subsequent CO2 adsorption on single Ni(II) sites with LME is proved to be thermodynamically favored, and hence dominates the high CO selectivity. This work highlights the significance of modulating the LME of single atoms to rationally design photocatalysts for realizing carbon neutralization.