By heat balance analysis of the whole regenerative system, which is regarded as a closed thermodynamic system, the calculation model on the influence of HPs removal on heat economy of unit is derived.

以汽轮机功率方程和锅炉吸热量方程为基础，并将机组的整个回热系统视为一闭口热力系统，通过对其的热平衡分析，得到了高加切除对机组热经济性影响的计算模型。

youdao

This paper presents a no-arbitrage model of closed-form approximation for valuing basket options under a stochastic interest rate economy.

本文推导出在随机利率经济体系下，无套利条件之组合型选择权的近似封闭解。

youdao

That growth relied on a state-led development model, financed with foreign debt within a semi-closed economy.

ECONOMIST: Getting it together at last