Directory of operating non-metallic mines in the Philippines from 2017 to 2022. Retrieved from http://databaseportal.mgb.gov.ph/#/public/documents/MEIPD/Directory%20of%20Operating%20Non-Metallic%2

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采用“分层采集+联动加工”规则体系：数据采集，按“明细-汇总-问题”三层结构定向采集，成本单耗明细记录覆盖具体成本项目、月度核心指标记录汇总运输量与效率，形成完整数据链条；数据加工，运用多维度联动，如“运输量-产量匹配度”计算、“项目占总单耗比例”统计，同时实施成本单耗标准化处理、效率指标区间校验，确保成本与效率数据的关联性和准确性。

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This study used two inputs variables; total hydropower installed capacity (megawatts per hour) and long-term average annual precipitation (in volume), and inputs costs; mean renewable energy feed-in t

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Operational man-hours in non-metallic mineral mining South Korea 2023, by type

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