例句與造句

1. Method of symmetrical coordinates
   對稱坐標法
2. Accurate mathematical model is set based on the whole system , and simulator program of dynamic and steady condition is established , which is use to calculate the dynamic and steady performance by kron and symmetrical coordinate converter
   論文通過對電機基本方程進行kron變換和對稱分量變換，分別建立了系統(tǒng)完整的數(shù)學模型，編制了動態(tài)和穩(wěn)態(tài)仿真程序，并對系統(tǒng)進行了仿真，對系統(tǒng)的動態(tài)、穩(wěn)態(tài)性能進行分析。
3. The study has completed the design of two - phase inverter and made up of the two - phase inverter - motor system for experimental use it is a variable frequency adjustable speed system with a open - loop control of rotational speed , which consists of voltage - controlled oscillator circulating assign device inverter circuit and two - phase induction motor a accurate mathematical model is set based on the whole system , and simulator program of dynamic and steady condition is established , which is used to calculate the dynamic and steady performance by kron and symmetrical coordinate converter by simulator calculation and experimental research with specific parameter of the system , a comparison is made between predicted and experimental characteristics , experimental measurements are shown to compare closely with corresponding theoretical result it is compared with some variable frequency adjus table speed system comprising inverter and single - phase induction motor from the system efficiency torque pulsation and the effect of two - phase inverter capacitance based on the conclusion , harmonic cancellation pulse width modulation control of a two - phase inverter - fed induction - motor drive system is researched , which cancelled the low harmonic and improve the system performance
   通過對電機的kron變換和對稱分量變換，建立了系統(tǒng)較精確的數(shù)學模型，編制了系統(tǒng)動態(tài)及穩(wěn)態(tài)運行的仿真計算程序分別計算系統(tǒng)的動態(tài)和穩(wěn)態(tài)性能。通過對系統(tǒng)的具體參數(shù)進行了仿真運算和實驗研究，實驗和仿真結果進行比較，說明實驗和理論較為一致，并從系統(tǒng)效率、轉矩脈動及兩相逆變器電容的影響等方面與各種逆變器和單相異步電動機組成的變頻調(diào)速系統(tǒng)加以比較。在此基礎上，對兩相逆變器供電-異步電動機系統(tǒng)使用諧波抑制pwm控制進行了研究，由于減少了低次諧波，改善了系統(tǒng)性能。
4. It's difficult to find symmetrical coordinates in a sentence. 用symmetrical coordinates造句挺難的