最小過冷度 的英文怎麼說

中文拼音 [zuìxiǎoguòlěngdù]
最小過冷度 英文
minimum subcooled temperature
  • 最 : 副詞（表示某種屬性超過所有同類的人或事物） most; best; worst; first; very; least; above all; -est
  • 小 : Ⅰ形容詞1 （體積、面積、數量、強度等不大） small; little; petty; minor 2 （年紀小的; 年幼的） youn...
  • 過 : 過Ⅰ動詞[口語] （超越） go beyond the limit; undue; excessiveⅡ名詞（姓氏） a surname
  • 冷 : Ⅰ形容詞1 （溫度低; 感覺溫度低） cold:冷水 coldwater; 你冷不冷? do you feel cold?; are you feeling...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  1. Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece

    將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義
  2. Eev should be selected for various refrigeration systems according to the thermal properties of refrigerants ; the discharge coefficient of eev is sensitive to the aperture and impulse quantity of eev ; when the eev structure is made, the discharge coefficient goes up with the lowering of evaporation temperature or goes down with the hoisting of the condensation temperature. it is le

    對于不同工質的冷藏集裝箱製冷系統，電子膨脹閥應該根據具體製冷劑的熱力性質選取；電子膨脹閥流量系數對孔徑和脈沖數比較敏感；在結構固定時，流量系數隨蒸發溫度的降低而升高，隨冷凝溫度的增加而增大，受過冷度變化的影響較小；電子膨脹閥的容量受孔徑影響最大。
  3. At first, modeling of these divvies by rate equations to obtain expressions for threshold and slope efficiency is given. on the case of this theory, the large numbers of literatures and datum are consulted, and the laser is home studied. through rationally selecting and improving the reflector surface, ensuring the beam quality, increasing farthest the absorption path, and improving effective pumping frequency ; through designing the water cooler of yag bar, the volume of laser is half the same internal and international production, and the output power is get to the extremum of the same international production

    並在此基礎上查閱了大量文獻和資料，對該種激光器進行了深入的研究，通過對yag棒直徑的合理選取併合理地改進反射鏡面，從而既保證了光束質量又最大限度的增加了吸收長度，有效的提高了泵浦效率；在不影響泵浦的前提下，通過有效縮短yag棒的長度減小輸出損耗；對yag棒的水冷系統進行優化結構設計，使激光器體積減小到國外同類產品體積的一半，而輸出功率已達到國外同類產品的極限值。
  4. The results proved that : ( 1 ) because of the material ' s difference of primer - 9 and primer - 5, the maximum stress of primer - 5 is larger than primer - 9 but the maximum displacement is smaller than primer - 9. ( 2 ) because of the unrenewable shape changing of primer - 9 after impacting by the pin, it will cracking under high pressure more easily. so, the paper give the suggestion that the designer should decrease the depth of impacting by pin in the case of the primer be fired successfully

    對底- 9底火、底部被擊針撞擊后的第- 9底火和底- 5底火在膛壓作用下分別進行了有限元數值分析，計算表明： （ 1 ）底- 5底火底部擊針撞擊部位為火帽座，其材料為鋼帶，底- 9底部承受撞擊部位為底火體，其材料為冷拉退火圓鋼，由於材料強度不同，承受壓力能力和變形能力不同：雖然在膛壓作用過程中底- 5底火的最大應力值比底- 9底火的大，但底- 5底火的最大位移量卻比底- 9底火的小得多。
  5. The heart of the 3. 5 - tonne satellite is a container holding four spheres the size of ping pong balls that will be chilled to near absolute zero and spun 10, 000 times a minute, making them the most accurate gyroscopes ever built

    這個3 . 5噸的人造衛星核心部分是一個裝有4個乒乓球大小的圓球的容器，這些小球可以被冷凍到絕對零度並能每分轉10000轉，這些都使這個裝置成為建造過的最精確的陀螺儀
  6. Starting from the frozen food and refrigeration principles and using comparative analysis method, we get conclusions that in the blow - frozen device, the open - mode, cold - quantity reclaim, low - press, direct - cooling air, absorbing - heat air cycle have the most significant reductions in food freeze dry cost, food hygiene, devices delicate, organizating air stream, non - electrical heat, high efficiency and safe refrigeration etc. the cold - cumulating and dryness tin is the equipment which applys the store - release characteristic of cold - cumulating stuff, ensures the higher efficiency of open - mode cold - quantity reclaim low - press direct - cooling air, shoulders conveyance of the saturated and frozen air to frozen storeroom to reduce dry cost of food and dry the cycling air to ensure safe and reliable

    從食品冷凍和製冷原理入手，用對比分析方式得到了在吹風式凍結裝置中，開式回冷低壓直接冷卻吸熱循環空氣製冷機具有最大幅度降低食品凍結乾耗、確保食品冷凍安全、系統簡單、凍結庫小巧、氣流易於組織、無電機熱量、效率較高和製冷安全等結論。蓄冷乾燥器是通過蓄冷材料的蓄?釋冷特性，來保證開式回冷低壓直接冷卻吸熱循環空氣製冷機具有較高的效率，同時蓄冷乾燥器還擔負著輸送飽和低溫空氣至凍結庫以降低食品凍結乾耗和乾燥循環空氣以確保整機安全可靠工作的主要設備。
  7. Minimum subcooled temperature

    最小過冷度
  8. The dry / wet changes of surrounding area of bohai sea during past 500 years are divided into 7 stages, based on dry / wet indexes ( d / w ) of this area from 1470 to 1985 then, the changes of dry / wet spatial types ( d / wst ) and its related dry / wet regional different iation ( d / wrd ) features among different stages are analyzed. the results show that there are 4 main kinds of d / wst in this area, whose notability and spatial distribution features in different stages are apparently different, which reflects, very well, the changing process of the d / wrd of this region in past500 years. further analysis also presents that, in warmer period, the d / wst and the d / wrd patterns are relatively unsteady, meanwhile, the dry / wet changing difference among different parts of the region is relatively great, but, in colder period, it is just on the contrary. however, in the most severely cold period of the little ice age, t he area ' s d / wst and the d / wrd pattern sareveryu nsteady, and its d / wrd extenti salsot he high estin the whole past 500 years

    用研究區1470 1985年的旱澇等級資料，劃分了該地區500年來旱澇變化的7個階段，討論了不同階段間旱澇型的變化及其旱澇區域分異意義，結果表明， 500年來研究區有4類主要旱澇型，各型旱澇在不同階段的重要程度及場型特徵均有較大差異，深刻反映了該地區500年來旱澇區域分異特徵的變化，通過對500年來旱澇變化與溫度變化的對比發現，較溫暖期，研究區的旱澇型及旱澇區域分異格局較多變，旱澇變化的區域差異性較大，較寒冷期，旱澇型及區域分異格局較穩定，旱澇變化的區域差異性較小，而在小冰期最寒冷階段，旱澇型及旱澇區域分異格局的變動十分頻繁，旱澇變化的區域差異性亦最大
  9. In a quasi - static heating and cooling process, the resonant conditions, levitation force and threshold pressures pm ( the minimum entrapping pressure ) and pm ( the maximum pressure to keep the integration of a liquid drop ) are changed significantly

    在準靜態加熱和冷卻過程中，諧振條件、懸浮力以及聲壓閑值p 。 （最小俘獲聲壓）和pm （保持液滴不霧化的最大聲壓）隨溫度變化發生很大的變化。
  10. And the controlling method of pi makes the temperature control quick and stable. at the same time, the paper completes the mutual communication between temperature control equipment and computer by way of serial interface and usb interface, so as to realize the remote control of computer to the temperature control equipment. finally, the performance test of the semi - conductor temperature control equipment researched in this paper is carried out, and the results show that the precision of the temperature of the controller of semi - conductor can reach to 0. 2, and the degree of temperature stablization is less than 0. 05

    整個系統採用閉環控制結構，使系統的抗干擾能力大大增強;為半導體製冷器量身定做的驅動電路，可以方便的調節通過tec電流的大小和方向，使tec加熱製冷靈活迅速的特點得到充分發揮;使用比例積分（ pi ）的控制方法使得溫度控制快速穩定;同時，本文還實現了溫控儀與上位機通過串列口和usb口兩種方式的通訊，實現了上位機對溫控儀的遠程控制;最後，對所研製的半導體溫度控制儀進行了性能測試，測試結果表明，半導體溫度控制儀溫控精度達到0 . 2 ，溫度穩定度小於0 . 05 ，滿足了系統設計的要求。
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