例句與造句

1. A hydrodynamic optimal method to enhance the energy conversion coefficient of the vertical - axis variable - pitch turbine is presented in this paper based on the analysis of the existing mathematical models , on the computational methods for predicting the hydrodynamic performance of turbines and on the available experimental results . by applying mathematical optimal theory , a mathematical model for optimizing the hydrodynamic attack angle of the blades of turbines is formulated and some numerical results are obtained as well
   本文在總結(jié)和研究豎軸可調(diào)角直葉水輪機(jī)水動(dòng)力性能計(jì)算的現(xiàn)有數(shù)學(xué)模型，計(jì)算方法和實(shí)驗(yàn)結(jié)果的基礎(chǔ)上，運(yùn)用最優(yōu)化理論，給出了改善和提高該種水輪機(jī)能量利用率的一種優(yōu)化方法，建立了數(shù)學(xué)模型，并得到了計(jì)算結(jié)果。
2. At first an analysis of the basic principles of the vertical - axis variable - pitch turbine is given including two methods to calculate the induced velocity . one is the three different streamtube - methods which are single - disk single - streamtube ( sdst ) , double - disk single - streamtube ( ddst ) and multi - streamtube ( mtt ) method based on the momentum theory , the other is the vortex method ( vtth ) based on the potential eddy theory
   一是根據(jù)動(dòng)量定理的流管模型得到的求解誘導(dǎo)速度的單盤面?單流管方法( sdst ) 、雙盤面?單流管( ddst )方法、多流管( mtt )方法；二是根據(jù)勢(shì)渦理論得到的求解誘導(dǎo)速度的的渦方法( vtth ) 。
3. It's difficult to find variable-pitch turbine in a sentence. 用variable-pitch turbine造句挺難的