Time dependent ordinary differential equations are obtained from the mass and energy balances for each control volume.

针对每个控制容积建立了质量和能量平衡的微分方程。

youdao

Energy Information Administration International energy data and Analysis - a data bank of energy balances sorted by country.

国际能源情报局能源数据和分析-数据库由国家能源平衡分拣。

youdao

Models of theoretical processes are derived from first principles, using material and energy balances and fundamental laws to determine the model.

理论过程的模型是从第一原则得到的，这一原则利用物质和能量守恒以及基本法则来决定模型。

youdao

Hopefully the president is becoming more of a pragmatist about the need to craft a national energy policy that balances a desire for green energy with the need for more energy.

FORBES: Obama Ready to Make 'Tough Decision' on Offshore Oil Drilling

Ervin says the comment period "balances the need" for the Energy Department to carry out its responsibilities while giving the states a voice.

FORBES: Magazine Article

"This decision recognizes the importance of a state-based approach to regulating hydraulic fracturing one that balances this important method for producing energy with environmental protection, " he said Monday through spokesman Renny MacKay.

NPR: Judge Sides With Wyoming In Fracking Chemical Suit