粗短管 的英文怎麼說
中文拼音 [cūduǎnguǎn]
粗短管
英文
stub pipe-
Trumpet flugel horn
小號及粗管短號It has led to, first, the insufficiency of funds for education, second, the injustice in the distribution of educational funds, third, schools " lack of independence, fourth, the lack of macro - domination in the development of elementary education. after the analysis this thesis holds that this phenomenon results from the following : 1. the indistinct duties and rights of the local governments and schools ; 2
其突出問題表現為： 1 、地方政府財力薄弱，義務教育經費嚴重短缺； 2 、教育資源配置不公平，教育資源配置效率低下； 3 、政府包攬辦學權和管理權，對學校干預過多，學校缺乏辦學自主權； 4 、農村教育管理缺乏宏觀調控； 5 、農村教育領導不力、管理粗放。The simulation shows that the valve throttle area should be little as possible but must be more than 40 % of pipe section area ; when the total length of pipe is same, and the flow quantity is enough, pipe before primary valve should be thin and long, and the pipe after primary valve should be thick and short, the upriver and downriver small pressure fluctuation will badly lead to waterdrammer pressure rising, and spending more time in establishing pressure and flow quantity
模擬表明，閥門過流面積在滿足大於管道截面積40 %的條件下應盡可能小;在管道總長一定並滿足流量要求的條件下，主閥前應採取長而細的管道，閥后則應採用短而粗的管道;上下游微小的壓力波動都會嚴重增大開關閥門引起的水擊，並使壓力、流量的建立需要更長的時間。It can efficiently reduce the time and cost of development and can provide support method, such as, optimizing design, real time simulation, failure diagnosis, on orbit management etc. this thesis base on vpm platform to build a coarse - grained virtual prototype of space station, mainly discussed : ( 1 ) the construction and expanding of vpm virtual prototype, a user model about space station has been programmed for vpm
這樣可以有效的縮短研製周期、節約研製費用，並為實際運行提供優化設計、實時模擬運行、故障診斷、運行管理等支持手段。本論文基於虛擬樣機vpm平臺，建立了空間站粗粒度虛擬樣機，主要進行了以下的研究： （ 1 ） vpm虛擬樣機的構成、擴充。分享友人