預旋轉 的英文怎麼說
中文拼音 [yùxuánzhuǎn]
預旋轉
英文
pre-rotation=prerotation-
Accurate load forecasting is helpful to planning generators " starting and stopping in the interior of the electrical networks economically and reasonably, preserving the security and stability of power system, reducing the unnecessary circumvolving repertory capacity, making planning to overhaul the units in reason, ensuring the normal production and life of the society, effectively reducing the cost of generating electricity, increasing the economical and social benefit
電力負荷預測是供電部門的重要工作之一，準確的負荷預測，可以經濟合理地安排電網內部發電機的啟停，保持電網運行的安全穩定性，減少不必要的旋轉儲備容量，合理安排機組檢修計劃，保證社會的正常生產和生活，有效地降低發電成本，提高經濟效益和社會效益。Adopted unique ventilation system and rotational direct current motor stabilize the hot airflow
採用獨特的導風系統及旋轉式直流電機，恆定預熱風量。Ground level restaurants offer outdoor seating on the waterfront promenade at the base of the tower. usually recorded music plays, but live entertainers also appear there. it is a nice spot to sip a beverage, savor the flavours of local cuisine, and watch the lights bobbing up and down as boats of all sizes pass by
該塔共有二大特色，除了在頂層旋轉餐廳鳥瞰澳門及對岸風景外，低層的咖啡餐也設有露天座位，一邊嘴饞地道小食時，耳聽著現場或預先錄好的音樂，眼望在海中閃爍的船兒經過，也是不錯的節目。( 2 ) the results reveal that the pre - swirl ratio has a great influence on the flow field of the rotating disk, even greater than the rotational reynolds number, and an initial constant is induced in moment coefficient cm and average nusselt number nuave correlations, which does not exist in the case of without pre - swirl
（ 2 ）分析了預旋系數_ r對該旋轉盤腔流場的影響，定義了一個新的壓力系數c _ p ，該壓力系數c _ p沿徑向位置的變化對特定的旋轉雷諾數re _是一個常數。Rotor dynamic devise is the vital ache on rotating mechanism design. and prefiguring critical speed. calculating unbalance response is the central content
轉子動力學設計是旋轉機械設計中的重要環節，而預計臨界轉速、計算不平衡響應又是其主要內容。By comparing the results with relative experiment data, it is shown that rng k - is more exactly than the other turbulent model. 2 ) the influences of axial inflow position, radial outflow size, rotating reynold number, non - dimensional mass flowrate and axial inflow angle on the flow and heat transfer characteristics were numerically investigated for a typical rotator - stator cavity with axial inflow, radial inflow and radial outflow. the correlations for average nusselt number vs rotating reynold number or non - dimensional mass flowrate were established
（ 2 ）針對一典型的徑向、軸向進氣，徑向出氣的轉-靜盤腔結構，系統研究軸向進氣位置、徑向出口大小、旋轉雷諾數、無量綱質量流量和軸向垂直預旋進氣等對盤腔內流動和換熱的影響，整理出轉-靜盤腔內轉盤平均努謝爾數與旋轉雷諾數無量綱質量流量之間的準則關聯式。4 ) in a pre - swirl rotator - stator cavities with discrete pre - swirl nozzles and blade - cooling entry holes, the influences of pre - swirl angle and flow parameter on the flow and heat transfer characteristics were numerically investigated. the correlation for average nusselt number vs rotating reynold number or non - dimensional mass flowrate were established. the results show that : advantage of per - swirl inflow is the effect of cooling the blade - cooling entry holes ; pre - swirl inflow increases heat transfer in rotating disk of pre - swirl chamber ; as pre - swirl angle increases, local nusselt number decreases in pre - swirl chamber ; the temperature of stator of inner rotator - stator chamber and per - swirl chamber decreases as rotating reynold number increases ; when the axial mass flowrate maintains constant, heat transfer in the rotating disk of inner rotator - stator cavities does n ' t change as per - swirl mass flowrate increases, while heat transfer in the rotating disk of per - swirl chamber increases ; when the pre - swirl mass flowrate maintains constant, change of the axial mass flowrate has effect on the whole cavity
結果表明，預旋進氣的優點在於增強了葉片冷卻孔附近的對流換熱效果，局部努謝爾數隨預旋角的增大而有所減小；隨旋轉雷諾數的增加，不論是內轉靜腔室還是預旋腔室的靜盤上的溫度都不同程度的降低：當軸向中心進氣質量流量不變時，隨預旋進氣的質量流量增加，內轉靜腔室的轉盤盤面上的換熱基本沒有變化，而預旋腔室的轉盤盤面上的換熱效果增強；當預旋進氣質量流量不變時，軸向中心進氣的質量流量的改變對整個盤腔都有影響。This image then will be recovered and threshold transformed, thickened and rotated. finally system measures the parameters of the micro - hole and outputs the result. the high - automation of the system makes the worker with responsibility for measuring spinneret do much less than before
然後通過去噪、閾值處理、圖像細化、邊緣檢測、圖像旋轉等預處理后，再對微孔的形狀分析和參數測量。In those processes, preprocessing is based on a serial of algorithms using gobar filtering techniques and mathing is based on a compound algorithm in two stages : the first is a structural maching using local features and the second is a point matching by rotation and displacement
其中，指紋預處理採用了以gobar濾波為核心的一套演算法；指紋匹配採用了基於結構信息的指紋初篩和基於旋轉平移的點匹配指紋確認兩級構成的復合式演算法。Potentiometers ; preset potentiometers, lead screw actuated or rotary ; terms and definitions, characteristics, methods of test
電位計.導螺桿作動或直接旋轉調節的預調電位計.術語Harmonized system of quality assessment for electronic components : sectional specification : lead screw actuated and rotary preset potentiometers
電子元器件用質量評估協調體系.分規范.導螺桿傳動和旋轉式預調電位器When the prefabricated plant is under the viaduct, the monolithic box girder is lifted by the gantry crane and transported by the special rotary traversed platform, and then transported and erected by the bridge girder transporting and erecting machine
當預制梁場設在高架橋下時，採用提梁機提起整孔箱梁，通過特製旋轉式橫移平臺喂梁，運架一體式架橋機運梁和架梁。Aim at this problem, revolving invariance printing numerals recognition system is set up in this paper. this system includes three parts : preprocessing part, extract feature part and recognition part
針對這個問題，本文建立了一個具有旋轉、平移不變性的印刷體數字識別系統，系統主要是由三個部分構成，即預處理、特徵提取和識別。Miraball is a powerful advertising tool, making use of the persistence of vision. when a row or several rows of ultra brighter wide angle led spins at 2000 - 2200rpm, the built - in cpu commands the led dots light up or go out at a very accurate pre - programmed sequence, the user ' s desired texts and wild miraculously appear and float inside a crystal - like ball to catch all eyes
二：魔球是一實用新型的消費前沿動態廣告信息的發布媒體，內置微電腦晶元處理經個人電腦預先編輯后存於記憶體內的圖信息后，按非常精確的時序不斷點亮和熄滅，在一列或數更高速旋轉廣角發光二級管列陣中特定的點，在人眼視覺暫留作用下，用戶想要的圖文就會神奇地浮現在球體內360度的視覺空間中。Considering the characteristic of vibration of rotary machines, this thesis makes a thorough discussion of forecasting the trend of vibration by a means of time series model, puts forward means of processing the nonstationarity, nonnormality and singular value of the field data and distinguishing their models to build a appropriate model and gets precise mulstep forecast to the trend of vibration
針對旋轉機械的振動的特點，本文深入討論了利用時間序列模型預測振動趨勢的方法，並提出了如何處理現場數據的非平穩性，非正態性，奇異值和模型類型判別方法，以構建合適的模型，實現對振動趨勢進行準確的多步預測。Based on the day - schedule, short - term load forecast, and monitoring program for spinning reserve, the economic dispatch of east china power grid can be realized, which can ensure time margin for load balancing
在日計劃編制的基礎上，結合超短期負荷預計及旋轉備用監視程序，對華東電網各省市的口子及直屬電廠實行經濟調度，使調度在進行出力及負荷平衡時有一定時間裕度及科學依據。As a result of the heightening of mechanical operation speed and the application of new materials and new structures, the nonlinear dynamic behavior in rotating machines is becoming increasingly outstanding and important. nonlinear dynamic phenomena in rotating machines cant be described, explained and predicted by rotordynamics based on linear system theory. along with the deepening and permeating of nonlinear scientific research, the nonlinear vibration of rotor systems has become an attractive field in recent years. from a point of view to set up the distinct corresponding relations between vibration states and failures of rotating machines, main advances in the research of rotor nonlinear vibration are summarized, and typical nonlinear dynamic phenomena and their forming mechanism are also summed up in the paper. the aim of the paper is to enrich the diagnostic knowledge base of rotating machines. 55refs
由於機械運轉速度的不斷提高和新型材料、新型結構的推廣應用，旋轉機械的非線性動力學行為日顯突出和重要.基於線性系統原理的轉子動力學理論與方法難以對實踐中出現的豐富的非線性動力學現象作出準確的描述、闡釋和預測.近年來，隨著非線性科學研究的深入和滲透，轉子系統非線性振動已成為應用力學和機械工程領域的研究熱點之一.從有利於建立旋轉機械振動狀態集與故障集之間的映射關系出發，綜述了近年來轉子系統非線性振動研究的主要進展，總結了轉子系統中出現的典型非線性動力現象及其產生機理，目的在於豐富旋轉機械故障診斷知識庫.參55Specification for harmonized system of quality assessment for electronic components - blank detail specification - load screw actuated and rotary preset potentiometers - assessment level e
電子元器件質量評估協調體系.空白詳細規范.絲桿傳動和旋轉式預調電位器.評估等級eHarmonized system of quality assessment for electronic components - potentiometers for use in electronic equipment - sectional specification : lead screw actuated and rotary preset potentiometers
電子元器件質量評估的協調體系.電子設備用電位器.分規范:絲桿傳動和旋轉預調電位器Specification for harmonized system of quality assessment for electronic components - potentiometers for use in electronic equipment - blank detail specification : lead - screw actuated and rotary preset potentiometers - assessment level f
電子元器件質量評估協調體系規范.電子設備用電位器.空白詳細規范:絲桿傳動和旋轉式預調電位計.評估等級f分享友人