1.Lifetime properties of a cumulative shock model with a cluster structure
2.Optimal configuration of a green product supply chain with guaranteed service time..
3.Micro-Study of the Evolution of Rural Settlement Patterns and Their Spatial Associ..
4.Matheuristic for a two-echelon capacitated vehicle routing problem with environmen..
5.Analysis of the Influencing Factors of Migrant Worker Social Insurance in Lanzhou