从系统能量分配和平衡的角度，简化了生物质气化与废弃物焚烧联合发电系统的数学模型。
In the view of the distribution and balance of energy, mathematic model of biomass gasification and waste incineration combined power generation system was simplified in this paper.
提出了钢与混凝土简支组合梁的徐变效应简化分析方法，建立了粘弹性分析的数学模型。
A simplified method for analysis of creep effects in steel-concrete simply supported composite beams is presented. The mathematical models of viscoelastic analysis are created.
根据简化的推进系统物理模型，建立了贮箱、管路、自锁阀与过滤器，以及推力器的仿真数学模型。
The simulation models of tank, pipe, self-locking valve and filter, and thruster were established according to the simplified physic model of the propulsion system.
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