Int J Health Geogr - Spatial optimization of residential care facility locations in Beijing, China: maximum equity in accessibility.

Tópicos

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Resumo

CKGROUND: The residential care system is rapidly developing and plays an increasingly important role in care for the elderly in Beijing. A noticeable disparity in the accessibility to existing residential care facilities, however, is demonstrated in existing studies. The spatial optimization of residential care facility (RCF) locations is urgently needed to promote equal access to residential care resources among the elderly population.METHODS: A two-step floating catchment area method with an additional distance-decay function is adopted to measure accessibility to residential care facilities. The spatial optimization model is developed to maximize equity in accessibility by minimizing the total square difference between the accessibility score of each demand location and the weighted average accessibility score. The Particle Swarm Optimization (PSO) method is implemented for the solution.RESULTS: The optimized RCF layouts improve equal spatial access to residential care resources with very low accessibility standard variation (0.0066). A relatively large number of beds (51% of the total beds) to be located in the suburban districts between the central and periphery districts of Beijing are optimized. A smaller number of beds to be located in the central and periphery districts (33% and 16% respectively) are optimized. The gaps between the existing and optimized layouts suggest that more RCF beds (5961 beds) are needed in suburban districts, while the RCF beds in some subdistricts located in the central and periphery districts are oversupplied (5253 and 1584 surplus beds respectively).CONCLUSIONS: The optimized results correspond to the municipal special plan proposed by the Beijing government. The optimization objective of this study is different from traditional facility location optimization models, and the method is efficient in maximizing equal access to residential care facilities. This method can support knowledge-based policy-making and planning of residential care facilities.

Resumo Limpo

ckground residenti care system rapid develop play increas import role care elder beij notic dispar access exist residenti care facil howev demonstr exist studi spatial optim residenti care facil rcf locat urgent need promot equal access residenti care resourc among elder populationmethod twostep float catchment area method addit distancedecay function adopt measur access residenti care facil spatial optim model develop maxim equiti access minim total squar differ access score demand locat weight averag access score particl swarm optim pso method implement solutionresult optim rcf layout improv equal spatial access residenti care resourc low access standard variat relat larg number bed total bed locat suburban district central peripheri district beij optim smaller number bed locat central peripheri district respect optim gap exist optim layout suggest rcf bed bed need suburban district rcf bed subdistrict locat central peripheri district oversuppli surplus bed respectivelyconclus optim result correspond municip special plan propos beij govern optim object studi differ tradit facil locat optim model method effici maxim equal access residenti care facil method can support knowledgebas policymak plan residenti care facil

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