閉直交集 的英文怎麼說
中文拼音 [bìzhíjiāojí]
閉直交集
英文
closed orthogonalset-
Through consulting lots of relevant references, present research of direct drive volume control hydraulic servo system is summarized in this paper, the principle and character of this system are expatiated, the principle of vector control is introduced. at the same time, the mathematical model of ac asynchronous motor is set up based on the vector control theory. the mathematical models of both the pump controlled motor and pump controlled cylinder are set up and simulated in this paper
在查閱大量國內外相關文獻的基礎上，本文綜述了國內外對該系統研究概況，闡述了該類系統原理和特點;闡述了矢量控制的基本原理，並基於這一原理建立交流異步電動機的數學模型;分別建立了泵控馬達系統和泵控缸系統的數學模型，並給出了模擬分析;設計了用於泵控馬達系統的集成閥塊，加工了密閉壓力油罐;針對現有直驅式電液伺服裝置所存在的問題，本文主要針對系統工作過程中所產生的噪音與爬行問題進行了一定的研究。There are some direct reasons explaining the origins of village debts. village enterprises are set up blindness, without any justifications, so most of them do not get benefits and are even bankrupt. village organizations borrow money for submission fanners " tax and expenses that could not be afford by the farmers
村級債務形成的直接原因主要有：村集體工業項目缺乏論證，盲目興辦造成欠資或者倒閉；農戶欠稅費，村組織借資墊交；不顧客觀條件，超前興辦公益事業；管理不善，非生產性開支過大；集資攤派，達標評比；歷史遺留債務至今沒有解決；天災人禍，突發事件等。Because the shenda highway is always the important transport hinge which connects dalian and the northeast economic hinterland, after blockage the impacts to the dalian port ' s turnoff of container are inevitable, so do the station of dalian port in the northeast logistics layout and the competitive environments of the surrounding ports
由於沈大一直是大連與東北經濟腹地貨物往來的重要交通樞紐，封閉以後勢必會對大連港的集裝箱貨運量產生影響，進而影響大連港在東北物流格局中的地位和與周邊港口的競爭環境。
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