low level air 中文意思是什麼

low level air 解釋
大氣低層
  • low : adj 1 低的；淺的，矮的。 low flight 低飛。 a low temperature 低溫。 low tide [water] 低潮。 The g...
  • level : n 1 水平儀，水準儀；水準測量。2 水平線，水平面；水平狀態；平面，平地。3 水平，水準；水位；標準；...
  • air : n 1 空氣，大氣。2 天空，空中。3 微風，和風。4 態度，樣子，風度，氣派；〈pl 〉高傲的架子。5 傳播，...
  1. Low - level cyclones usually imply horizontally confluent flow and vertically rising air resulting in inclement weather. low - level anti - cyclones bring in fine and stable weather due to horizontally diffluent flow and vertically sinking air

    低空氣旋表徵水平匯聚、垂直上升的不穩定氣流，可以導致惡劣天氣產生；低空反氣旋則代表水平輻散、垂直下沉的穩定流場，伴隨著晴朗的天氣。
  2. There are 500 ton and 315 ton oil pressure, and 176 sets of kinds of machine process and checking equipments in the factory. the mould we designed are economical applied and low making charge short period. we produce back - door level air - spring, jack, brake oil pipe, accelerator pedal for micro car and engine mid - parts, gemel, tri - way air pipe, adiabatic board and other welding parts

    工廠主要生產微型汽車系列背門撐桿制動油管千斤頂等總成，以及發動機倉中置構件側圍頂上內蒙皮等沖焊件，已形成年產30萬車付的能力，其中背門支撐桿制動油管供應量佔了長安公司一半以上。
  3. Measurement precision contribute to improving the security class and economic of boiler running and automatic level of whole plant. the smart measurement instrument of the boiler ’ s air flow designed in the thesis and the instrument can make the degree of accuracy get to. firstly, the thesis build the “ velocity - area ” method which is on basis of “ log - tchebycheff ” on the analyzing of basic measure method of boiler ’ s air flow. secondly, model86 averaging pitot tube was selected the right model of flow transducer which can pickoff the differential pressure and static pressure. modelc264 which made in setra system corp. u. s. a was selected as ultra low differential pressure transmitter. a good flow of boiler ’ s air was calculated by offsetting pressure and temperature. finally, numeroscope was designed with z80cpu and other chips

    精確的監測有助於提高鍋爐燃燒的安全型、經濟性，也有助於提高電廠的整體自動化水平。本文設計的智能化鍋爐風量測量裝置能夠實現對鍋爐送風的精確測量，精度可達。本文首先研究鍋爐送風矩形大管道測量理論，提出在流來流量測量測點布置基於「對數-切比雪夫」法的速度-面積法。
  4. If you are exposed to low to medium levels of air pollution, there is no general concern. for high level of pollution, there is no immediate concern but long - term effects are possible with persistent exposure. very high and severe pollution levels can mildly or significantly aggravate the symptoms to people with heart or reparatory illness

    若空氣污染水平屬輕微至中等，表示對一般公眾沒有影響；若空氣污染水平屬偏高，表示雖然對一般公眾沒有即時影響，但長年持續暴露亦可對健康造成長遠影響；若出現甚高或嚴重空氣污染水平，可能會輕微或嚴重加劇患有心臟病或呼吸系統疾病人士的病徵。
  5. The activity of cold air and interannual variation of low level jet are important cause of interannual variation of the rainfall in april. interannual variation of subtropic high is the main cause of interannual variation of the rainfall in may over north china. there is significant negative correlation between interdecadal variation of the rainfall in april and that of sst in the areas of equatorial indian ocean and tropic middle - east pacifi

    華北4月降水與熱帶中東太平洋、赤道印度洋海溫年代際變化呈明顯的負相關:華北5月降水與熱帶中東太平洋、赤道印度洋海溫年代際變化存在明顯的正相關:熱帶海溫的年代際異常引起的副熱帶高壓的年代際異常可能是影響華北4 、 5月降水異常的重要原因。
  6. ( 2 ) another interesting phenomenon is founded that the center of south asia high in the upper level of troposphere is stabile and nearly motionless during the processes of the westward extension of western pacific subtropical high, but its eastern ridge strengthens and extends eastward remarkably because of the anticyclone moves westward over the southeast japan, which may lead to the westward extension of subtropical high in the middle level of troposphere. ( 3 ) in the low level of troposphere, the north australia cold air activity plays an important role on the westward extension of subtropical high

    （ 2 ）本文在研究副高西伸過程中指出，高層200hpa上日本東南部的高壓併入南亞高壓，導致南亞高壓脊的增強發展，對低層500hpa上副高的加強、西伸可能起到引導的作用；同時，對流層低層850hpa上孟加拉灣槽在副高西伸過程中加深，並在西伸脊點到達最西點的前4天強度達到最強，這為預報西太平洋副高的活動提供了參考。
  7. Water wave pump combines the functions of air wave charger and water hammer pump to show fine performance, where the total energy of inflow is redistributed to heighten the presure of a part of the the flow to the desired level whereas for the rest of flow a low level of pressure is maintained, which causes moving water with high energy to reach to a higher place

    水波泵是一種巧妙地綜合氣波增壓器和水錘泵功能的全新的水泵，它通過合理利用水波動力的特殊性質，將來流中的總體能量進行重新分配，使一部分來流水提高到所需的高壓力，而其餘部分水則降到較低的壓力，即完成一個大多數能量向部分來流水轉移的過程。
  8. Low - level windshear and turbulence alerts for the approach and departure areas within 3 nautical miles of the runway thresholds are issued by the amo for relay by air traffic controllers to approaching and departing aircraft

    機場氣象所發出在跑道進口3海里內的機場升降區的低空風切變及湍流警報，由航空交通管制員轉送至正在升降的航機。
  9. ( 5 ) the spring greenland sea - ice extent is larger ( smaller ) : then during the following summer the high of the japanese sea is stronger ( weaker ), and the low of the asian land is stronger ( weaker ), which make the pattern of low west and high east easily ( uneasily ) form ; the ascending movement over north china is strengthened ( weakened ) ; the summer monsoon of east asia is stronger ( weaker ), then the southeastern, warm and damp airflow towards the north china is stronger ( weaker ), and the cold airflow of the high level over the north china is also stronger ( weaker ), which make the convergence of the cold and warm air over north china easily ( uneasily ) form ; the sst of the east pacific ocean is lower ( higher ), while the sst of west wind drift is higher ( lower )

    （ 5 ）春季格陵蘭海冰面積偏大（小） ：後期夏季日本海高壓偏強（弱） ，而大陸上低壓也偏強（弱） ，易（不易）形成西低東阻的形勢；華北地區的上升運動增強（減弱） ；東亞夏季風偏強（弱） ，向華北地區輸送的西南暖濕氣流偏強（弱） ，而對應高空華北地區上空冷空氣活動偏強（弱） ，利於（不利於）華北上空冷暖空氣的交匯；夏季赤道東太平洋海溫偏低（高） ，西風漂流區海溫偏高（低） 。在以上的環流背景下，華北夏季降水偏多（少） ，易澇（旱） 。
  10. The above analysis showed that this heavy rainfall event took on obvious meso - scale characters and was the combination of the three flows, so we can deduce : ( 1 ) surface southeasterly wind and topography may play the main role in this event ; ( 2 ) the easterly cold air rushing into the southern shaanxi province in the lower troposphere was strongly relative to the form of surface cold - front type of occlusion ; ( 3 ) there were two reasons for the secondary circulation ' s strengthen in the evening, one was the effect of a mountain - valley wind and the other may be latent heat leading to ascending motion ; ( 4 ) the shape of potential instability stratification corresponded well with the development of the warm - moisture advection ; and ( 5 ) the vapor providing essential thermodynamics was transported by a southwesterly low - level jet from the bay of bengal and the south china sea. furthermore, with the effect of terrain, the southern shaanxi province became the center of this extremely heavy rain process

    中尺度結構分析表明，本次暴雨具有明顯的中尺度特徵，是由三支氣流共同作用的結果，分析發現（ 1 ）地面東南風和地形在這次大暴雨過程起主要作用； （ 2 ）東路冷空氣主要是通過中低層侵入陜南地區的，並與地面冷式錮囚鋒的形成密不可分； （ 3 ）夜博士論文:中尺度地形對陜南暴雨的影響研究間垂直次級環流發展加強可能有兩個原因，一個是由於地形山谷風的作用，另一個是降水的潛熱釋放激發了上升運動: （ 4 ）位勢不穩定層結的形成與低層暖濕平流的發展有很好的對應關系; （ 5 ）本次暴雨的水汽主要靠偏南風急流將孟加拉灣和中國南海的水汽輸送至西北地區東部，為暴雨的發生提供了必要熱力條件。
  11. Provision of wide area low level air traffic surveillance system

    提供廣域低空空中交通監察系統
  12. The southeast low - air jet accompanying the tropical cyclone transported plenty of heat and moisture for the storm, the low - level heating and wetting weakeed the stability of the air, and the weak cool air intruded from the low - level and stimulated the convection, thus leading to the heavy storm

    伴隨登陸熱帶氣旋生成的低空東南急流為暴雨輸送了豐富的熱量和水汽，低層增暖增濕促使層結不穩定加劇，而西風帶弱冷空氣的侵入對暖濕空氣具有抬升作用，可觸發對流發展和不穩定能量釋放，導致大暴雨產生。
  13. As well as a missile launch, yesterday ' s flight involved mid - air refuelling and a low - level pass just 200 yards above the sea ' s surface at 560mph

    除了導彈發射，昨天普京總統還參加了空中加油、超低空飛行等軍事演習，飛機曾經以560英里每小時的速度在高出海平面僅200米的地方飛過。
  14. It is the important mechanism that middle - level dry and cold air current sunk, low - level warm and wet air current ascended. level direction energy sharp section is important to blaze middle scale hypo - circumfluence. severe convection weather was brought by layer - knot latent instability

    上層乾冷、下層暖濕的位勢不穩定層結可以使對流層中低層出現明顯的逆溫層，有利於不穩定能量積累，此次天氣過程產生的對流不穩定能量大，形成的上升氣流深厚。
  15. Abstract : on the basis of the analysis about noise sources of the air compressor, it shows that air dynamic noise is primary one. according to the theory of fluid mechanics, the mathematics model of the air compreesor air dynamic noise is found, which shows the relationship between the sound power level and other parameters. the knowing noise of the air compressor " s air dynamic is of low frequencies. the reliable data is provided for the noise and vibration control

    文摘:通過對空壓機噪聲源的分析，確認空壓機噪聲源中的空氣動力性噪聲為最強；由流體流場的聲學理論，建立空壓機動力性噪聲源的力學模型，它表明聲功率與其它參數的關系；並知空壓機的空氣動力性噪聲呈低頻特性，這為噪聲及振動控制提供了可靠的依據
  16. The result showed that the contamination situation in the lower zone of the office, i. e. the zone of occupants, was affected by of that of supply air. the supply air contamination should be kept to a low level in order to provide a good indoor air quality. however, the variation of the supply pollutant concentration has no influence on the indoor contaminant distribution of such system

    本文針對氣態污染物，研究了不同送風濃度對系統的影響，結果表明：置換通風房間的下部區域受送風污染物濃度的影響較大，人的工作區恰好處于該區，實踐中需要控制好送風濃度以保證人呼吸區的空氣品質；但是送風濃度的變化並不影響置換通風下污染物的分層分佈的特點。
  17. Overseas buyers are now inclined to maintain a low inventory level. their orders thus tend to be more frequent, in smaller amount, and require quicker delivery time, generating demand for the air cargo sector

    現時海外買家均傾向維持低存貨水平，因此，他們改為較頻密地發出訂單，但訂貨數量較小，又要求在較短時間內交貨，這個趨勢為空運業帶來不少需求。
  18. But when the baroclinicity of low level vortex was strengthened and when warm air came into being, all the rain belts lay in the left and the front of southeast low level jet

    當低渦的斜壓性加大，出現暖空氣的作用時，暴雨區均出現于西南風急流的左前方。
  19. With customers in the domestic air passenger transport market getting more and more mature, chinese airlines have never kept their service pace with customers ? expectation, so that their flight seat consumption rates stay at a low level, ? while they have been losing competitiveness in the market of international air routes, the prospect o f their development seems not so optimistic

    在國際航線的市場競爭中，國內航空公司一直處于下風，而在國內航空客運市場上，消費者的日趨成熟，航空公司的服務始終落後于顧客的期望，客座率難以提高，發展的前景不容樂觀。
  20. The different distributions of surface level pressure, wind ( 10 meter ) and surface air temperature before and after the regime shift indicate that the increase of aleutian low, position change of its core, and the change of wind field in accordance, especially during the winter months, are the major dynamic reasons for the significant reduction of ice extent in bering sea

    結果表明： 20世紀70年代後期，海冰范圍在白令海存在顯著的均值突變現象，而楚科奇海在對應階段則表現為更明顯的變頻現象；在突變點前後兩個時段里，阿留申低壓中心低壓加強、核心位置偏移以及對應風場分佈的變化是導致白令海海冰范圍明顯縮小的主要動力原因。
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