Traditional well-test models for liquid flow are not consistent with material balance equation.
传统的试井模型与物质平衡方程都是不一致的。
The updated mathematic models for calculation of the central pipe formotion in continuous cast billet are built up, based on the material balance and the previous published models.
通过物质平衡原理讨论并新建立了计算方坯中心缩孔的数学模型。
The pollution load calculation models of freshwater aquiculture were reviewed, including chemical analysis method, material balance method, box model for lakes and reservoirs, etc.
综述了淡水养殖污染负荷估算的方法： 化学分析法、竹内俊郎法及其同类方法、物料平衡法、湖泊和水库的箱式模型法。
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