Performance prediction and optimization for healthcare enterprises in the context of the COVID-19 pandemic: an intelligent DEA-SVM model [0.03%]
新冠肺炎疫情下的医疗企业绩效预测与优化：一种智能DEA-SVM模型方法
He Huang,Liwei Zhong,Ting Shen et al.
He Huang et al.
The coronavirus disease (COVID-19) pandemic has caused significant changes in the external environment of enterprises, resulting in tremendous negative impacts. Accordingly, the irregular fluctuation of business data poses a critical challe...
Industrial structure optimization, economic development factors and regional economic risk prevention in post COVID-19 period: empirical analysis based on panel data of Guangdong regional economy [0.03%]
后新冠肺炎时期产业结构优化、经济发展因素与区域经济风险防范的实证分析——基于广东区域经济面板数据的研究
Dongwu Wu,Linlin Wu,Yongbo Ye
Dongwu Wu
In the post-COVID-19 period, the regional economic development gap in Guangdong has expanded and the risk has increased. This is not conducive to building a well-off society in Guangdong in an all-round way. Optimizing the industrial struct...
A sustainable supply chain network considering lot sizing with quantity discounts under disruption risks: centralized and decentralized models [0.03%]
考虑数量折扣和中断风险的可持续供应链网络批量确定问题：集中式与分散式模型
Parisa Rafigh,Ali Akbar Akbari,Hadi Mohammadi Bidhandi et al.
Parisa Rafigh et al.
This study proposes a framework for the main parties of a sustainable supply chain network considering lot-sizing impact with quantity discounts under disruption risk among the first studies. The proposed problem differs from most studies c...
Amnon Rosenmann
Amnon Rosenmann
The k-cardinality assignment (k-assignment, for short) problem asks for finding a minimal (maximal) weight of a matching of cardinality k in a weighted bipartite graph K n , n , k ≤ n . Here we are interested in computing the seque...
Convex-Concave fitting to successively updated data and its application to covid-19 analysis [0.03%]
应用于COVID-19分析的凸凹拟合及其在顺序更新数据中的应用
Demetrius E Davos,Ioannis C Demetriou
Demetrius E Davos
Let n measurements of a process be provided sequentially, where the process follows a sigmoid shape, but the data have lost sigmoidicity due to measuring errors. If we smooth the data by making least the sum of squares of errors subject to ...
Ante Ćustić,Stefan Lendl
Ante Ćustić
The Steiner path problem is a common generalization of the Steiner tree and the Hamiltonian path problem, in which we have to decide if for a given graph there exists a path visiting a fixed set of terminals. In the Steiner cycle problem we...
The sum of root-leaf distance interdiction problem by upgrading edges/nodes on trees [0.03%]
树上通过升级边/节点的阻断问题的研究
Qiao Zhang,Xiucui Guan,Junhua Jia et al.
Qiao Zhang et al.
Network interdiction problems by upgading critical edges/nodes have important applications to reduce the infectivity of the COVID-19. A network of confirmed cases can be described as a rooted tree that has a weight of infectious intensity f...
Modeling and optimizing an agro-supply chain considering different quality grades and storage systems for fresh products: a Benders decomposition solution approach [0.03%]
考虑新鲜产品的不同质量等级和存储系统的农用供应链模型及优化：一种Benders分解求解方法
Fatemeh Keshavarz-Ghorbani,Seyed Hamid Reza Pasandideh
Fatemeh Keshavarz-Ghorbani
This paper proposes a mathematical model in the context of agro-supply chain management, considering specific characteristics of agro-products to assist purchase, storage, and transportation decisions. In addition, a new method for determin...
An integrated method for hybrid distribution with estimation of demand matching degree [0.03%]
一种混合配送集成方法及求解算法及其需求匹配度估计方法研究
Ling Gai,Ying Jin,Binyuan Zhang
Ling Gai
Timely and effective distribution of relief materials is one of the most important aspects when fighting with a natural or a man-made disaster. Due to the sudden and urgent nature of most disasters, it is hard to make the exact prediction o...
John Baptist Gauci,Silvano Martello
John Baptist Gauci