Phoenix EMS K/N Diagnostic: Data and Analytical Artifacts (v1.1)

Derived data and analytical artifacts supporting the manuscript "Decision-to-prediction ratio K/N as an instance-level diagnostic for SPO+ versus 2S-MSE on Phoenix EMS station siting". Includes OSRM travel-time matrix (56 stations × 359 tracts), CDC SVI 2022 tract-level percentiles, optimal station expansion MILP outputs, alternative-optima enumeration (cardinality-5, ≥500 solutions), K/N regression results, and all numerical contents of Tables 1-9.本数据集为支持下述研究手稿的衍生数据与分析成果：《决策-预测比K/N作为实例级诊断指标，用于SPO+与2S-MSE方法在菲尼克斯紧急医疗服务（Emergency Medical Services, EMS）站点选址中的对比诊断》。数据集包含OSRM出行时间矩阵（56个站点×359个人口普查街区）、美国疾病控制与预防中心（Centers for Disease Control and Prevention, CDC）2022版社会脆弱性指数（Social Vulnerability Index, SVI）的普查街区层面百分位数数据、最优站点扩建混合整数线性规划（Mixed Integer Linear Programming, MILP）输出结果、备选最优解枚举（基数为5，解数量≥500）、K/N回归分析结果，以及表1至表9的全部数值内容。