改變參考區域 的英文怎麼說

中文拼音 [gǎibiànshēnkǎoqūyù]
改變參考區域 英文
reference region change
  • 改 : Ⅰ動詞1 （改變） change; transform 2 （修改） revise; alter; modify 3 （改正） rectify; correct 4 ...
  • 參 : 參構詞成分。
  • 考 : Ⅰ動詞1 （考試; 考問） examine; give [take] an examination test or quiz 2 （檢查） check; inspect3...
  • 區 : 區名詞（姓氏） a surname
  • 域 : 名詞（在一定疆界內的地方; 疆域） land within certain boundaries; territory; region
  • 改變 : change; alter; transform; turn; convert; mold; modify
  1. Nowdays, under the pressure of agricultural manufacture mostly depend on market, and the peasants requirements becomes excessive, to enhance the efficiency of the small farmer " economy in large market, decrease the risk and indeterminacy in market bargaining, there must have a organization to be the agency inter peasants and market, the organization must delegate benefit of the peasants straightly and in deed, so construct farmer cooperative organization is. very important we can know the facts through evaluate the performance of the peasants cooperative organization history : the knowledge about cooperative and follow which guidance have some relation in the development of peasants cooperative organization ; we should choose the gradually pattern for system flux, must consider the economic behavior expect in the main body of organization - the farms

    通過對農民合作組織的歷史績效評價可以看到：對合作的認識和遵循的指導思想與農民合作組織的發展關系很大；在制度變遷道路選擇上應考慮借鑒漸進式改革之路；必須考慮參加者主體?農戶的經濟行為預期及產權結構、組織壟斷、規模等因素的影響。農民合作組織發展的必然性源於農業生產的生物性、地域分散性和生產的隨意性，同時也決定農民合作經濟組織必須具有靈活性、多樣化、可過渡性和以社區為基礎的特殊要求。從制度經濟學分析，農民合作經濟組織在降低農民外部交易成本、實現公平和效率平衡、降低風險和不確定性等方面具有經濟上的合理性，所以有進一步規范和發展的必要。
  2. Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent

    本文首先介紹了異步電機的數學模型，在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理，採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹，詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究，包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時，選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量，解決了扇區切換時的矢量突變問題。
  3. The effect of the variation of temperature and contact pressure of the sliding contact surfaces with frictional heating on each other, particularly the relationship of the applied pressure and the contact pressure and the effect of the separate variation of some parameters on the simulation results were taken account into in the course of numerical simulation

    在數值計算過程中，著重考慮了溫度變化與接觸區域壓力變化的耦合問題，接觸壓力與外加壓力的關系，以及分別改變一些參數對結果的影響。
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