輻合場 的英文怎麼說

中文拼音 [fúgěchǎng]
輻合場 英文
convergence field
  • 輻 : 名詞（車輪中車轂和輪圈的連接物） spoke
  • 合 : 合量詞（容量單位） ge, a unit of dry measure for grain （=1 decilitre）
  • 場 : 場Ⅰ名詞1 （平坦的空地 多用來翻曬糧食 碾軋穀物） a level open space; threshing ground 2 [方言] （...
  1. Introducing the theory and application of boundary element method on the sound radiation, giving the process of solving vibration noise radiation problem using boundary element analysis software ; presenting the coupling theory and the combination analysis of finite element method and boundary element method, and doing relevant analysis based on close drum shell ; programming the noise data simulation program using the numerical calculation software, simulating the acoustic and pressure data of a key point in the transient response acoustic field of the close drum shell, realizing the audibility of the noise, using the virtual reality tools to simulate the vibration noise of the drum shell ; combining the finite element method and boundary element method to analyze the vibration noise radiation of some gear box, and completing the whole simulation process of the vibration noise of the gear box

    綜合介紹了邊界元法在聲輻射問題上的理論及應用；並給出了運用邊界元法分析軟體求解振動聲輻射問題的過程。闡述了有限元法和邊界元法的耦合理論及組合分析方法，並以封閉鼓形薄殼為分析對象進行了相應的分析。利用數字計算軟體編制了噪聲數據模擬程序，並模擬了通過組合方法分析封閉鼓形薄殼瞬態響應聲場而獲得一關鍵點的聲壓數據，實現聲音的可聽化，隨后通過虛擬現實工具實現了該情形下橢球殼振動噪聲的虛擬模擬。
  2. By introduction of two lif layers, the adjustment of the position of thin layer alq3 in the microcavity is achieved and the effect of the coupling strength between the emissive dipole and vacuum electric - field on the emission intensity in ( / 2 - length microcavity is studied for the first time

    在帶有dbr結構的高q值微腔中，觀察熒光壽命變短輻射速率提高的現象。通過使用填充層，來實現對薄層alq在腔中位置的調節，研究了輻射偶極子同光電磁場的耦合強度對輻射強度的影響。
  3. The main research advances can be summarized as follows : ( 1 ) study the signal processing ' s performances and methods of homing torpedo system comprehensively, in order to setting up a corresponding mathematical models ; ( 2 ) analyze the ocean channel ' s effects on the work of homing system, then found some models such as target echo signal, noise ( including background noise, target radiating noise, etc ), ocean reverberation. according to them, simulate the array signal ; ( 3 ) the system structure, every function blocks composing are studied and founded thoroughly. then, discuss methods of signal processing in time domain and airspace domain ; ( 4 ) program the simulation software of torpedo ' s homing system according to the simulation models and flow charts, which connected with torpedo ' s control part

    本文所作的主要工作及研究成果主要有以下幾個方面： （ 1 ）對自導工作過程中的信號與信息處理的基本理論與方法進行了較為全面的研究，為建立一個較為完備的自導模擬系統提供了理論基礎； （ 2 ）討論了自導系統工作過程中海洋通道對目標回波信號與目標輻射噪聲信號等的影響，建立回波信號的數學模型、環境場中的噪聲信號模型（包括海洋環境噪聲、目標輻射噪聲與魚雷背景噪聲等）與海洋混響模型，模擬產生了聲自導系統基陣接收到的回波信號與噪聲信號； （ 3 ）深入研究並建立了自導模擬系統的總體框架，給出各個具體功能模塊組成，討論了聲自導系統對信號的時域與空域處理，並結合模擬程序中陣列信號處理模塊，給出固定多通道波束形成的模擬實現過程； （ 4 ）根據系統的模擬模型與已建立的模擬流程圖編制了通用魚雷模擬器自導系統模擬軟體，通過網路與控制系統相連，組成完整的魚雷模擬器。
  4. ( 5 ) the decadal variations of quasi - quadrennial and quasi - biennial components of wind stress fields make west wind anomaly of east pacific and meridional wind stress anomaly converging upon the equator stronger since 1980s

    （ 5 ）風應力距平場具有空間非對稱性，同時又有時間非對稱性： 80年代以後，太平洋中部的西風異常偏強；從赤道兩側向赤道輻合的經向風應力異常偏強。
  5. While carrying out the scheme, at first, the basic theory of antenna, array antenna and electromagnetic absorption, the performance parameter of antenna and parabolic antenna are deeply researched. in conformity, the characteristic and calculation of aperture field and near - to - far - field transformation for radiation pattern are detailed analyzed. second, the factors such as, the amount of the antenna elements, mutual coupling between each element, ground and the buildings on earth ' s surface, which affect the performance of array antennas ’ resultant field are stressed discussed

    在系統實現過程中，課題首先從天線、陣列天線，以及電磁場計算方法的基本理論著手，分析了天線與拋物面天線的各項性能參數，以及天線的口面場和近-遠區輻射場的特點和計算;進而，更加深入的討論和研究影響天線陣列合成場強的各項因素，包括系統所使用的天線單元個數對陣列合成場的影響、天線單元之間由於互耦造成的影響、傳播過程中地面和/或地面建築物的影響等。
  6. It was well known that the main process of precipitation formation was collecting cloud water in the warm area and ice phase particles melting in the cold area. positive vertical velocity existed between 700hpa and 500hpa in the warm area and near surface in the cold area. wind convergence existed at the height of 700hpa, and divergence existed above and below the height of 700hpa

    通過對降水雲系的綜合研究，建立了河南省春季層狀雲降水概念模型：暖區降水主要通過雲水碰並形成，冷區降水機制以冰粒子融化等冷雲過程為主;暖區700一50ohpa通常有上升氣流，冷區上升氣流分佈在近地面附近: 700沖a存在風場的輻合，其上下則主要是輻散區;水汽主要集中在7o0hpa高度上，暖區水汽來自南、東南方向，冷區水汽以西南輸送為主;暖區位勢不穩定分佈在o 。
  7. The analysis of the large - scale synoptic situation shows that strong precipitation is closely related to the explosion of monsoon and the intensification of cross - equatorial flow which bring a lot of vapor and meet with cold masses at the eastern of northwest district on 8th, june causing extremely heavy rainfall ; that subtropical high - level jet at 200hpa, subtropical high at 500hpa and low - level jet at 850hpa are the weather backgrounds favorable to strong precipitation ; that the pattern of eastern highs and western lows and the establishment of a low - level jet and the coupling between upper - and low - level patterns that determine that the rain occurred in the east of the northwest china ( on average, this is the rainy season for the south of china, but not for the northwest china ) ; that water vapor comes from southerly and easterly flow which converge at the eastern of northwest district with convergence mainly in lower levels and pbl ; that the high value of the whole - level apparent heat source < q1 > is near the area of large rainfall in the direction of northeasterly - southwesterly agreeable to shear line very well and the condensation latent heat releasing is main heat source with vertical advection item playing key role in q1 and q2 ; that there is a vertical secondary circulation crossing low - lever jet whose ascending branch is at the area of large rainfall ; that the construction of convection instability and conditional symmetry instability results that there is not only deep thermal instability, but also moisture influx and triggering mechanism of thermal instability causing strong torrential rain

    作為對比，本文還對2002年6月24 - 25日發生在北京地區的強地形雨進行了分析，並討論陜南、北京地區兩地暴雨的異同點以及地形作用的共性和個性，為兩地暴雨預報提供有益的參考，得出了一些很有意義的結果： 1大尺度環流背景分析表明： （ 1 ） 「 02 . 6 」強降水與6月上旬越赤道氣流和季風爆發密切相關，攜帶大量水汽的偏南氣流與冷空氣於6月8日交匯在西北地區東部，導致了這次強降水的發生； （ 2 ） 200hpa的副熱帶西風急流、 500hpa副高以及850hpa的低空急流的配置非常有利於本文分析之陜西強降水的發展與維持。大尺度形勢分析表明，東高西低形勢場、低空急流的建立和高低空形勢的配置決定了這場降雨出現在西北地區東部。與暴雨區相聯系，存在一支橫越低空急流的經向垂直環流，暴雨區處于該垂直環流的上升支； （ 3 ）偏南和偏東氣流水汽通道在西北地區東部交匯，水汽的輻合積聚主要在對流層低層和行星邊界層內完成； （ 4 ）整層的視熱源< q _ 1 >高值區在暴雨區附近呈東北-西南向分佈，與切變線走向非常一致，降水產生的凝結潛熱釋放是強降水區大氣的主要熱源。
  8. Genetic analysis shows that it may be caused by the difference of the response of each area to winter monsoon ' s abnormal, the kuroshio and our offshore is influenced mostly by heat flux between the sea and atmosphere, but in the other areas, the abnormal current incited by abnormal wind has decisive effect on the change of the sea temperature, at the same time, air pressure also has some impact on the sea temperature

    其區域性形成的原因主要可能是因為各海區對冬季風異常的響應方式不同，強冬季風使得黑潮與我國近海海洋過多散熱，海溫降低；在西北太平洋暖池北部，強冬季風引起西風異常，從而引發異常氣旋性環流，海水輻合下沉加熱其表層以下海水，同時異常環流使得更多東側異常暖水向西加熱其表層水；在黑潮與親潮交匯處的升溫也主要是由於強冬季風導致的流場異常，海水輻合下沉升溫。
  9. Although the runway anemometers did detect the arrival of sea breezes at chek lap kok, windshear could not be recognized when the convergence zone was to the immediate west of the airport

    雖然跑道上的風速表探測到有海風吹過赤角，但當輻合區貼近機場西面時，卻未能探測到風切變。
  10. Based on t213 and other observational datasets, a severe heavy rain occurred in changjiang - huaihe basins during 4 - 5 july 2003 is studied. the primary diagnostic analyses show that double or single block is the characteristics of the macroscale circulation in this rainfall process. the strong conflict of warm and cold mass, mesoscale convergence on meiyu front, shear line, and stably maintaining of high and low jets make for the rainfall

    本文採用地面高空常規資料，每6h一次的降水資料，以及t213數值預報資料，對2003年7月4 - 5日發生在江淮地區的一次梅雨鋒暴雨過程的影響系統及其可能機制進行了初步的診斷分析，發現，高緯雙阻、單阻形勢是這次暴雨過程發生的大尺度環流特徵；冷暖空氣的激烈交鋒、梅雨鋒上的中尺度輻合線、 700hpa 、 850hpa上的低渦、切變線以及穩定維持的高低空急流是導致這場暴雨的直接影響系統；該地區維持一個高能、飽和、潛在不穩定的環境，有利於特大暴雨的產生和維持。
  11. The model simulations indicate that the severe storm is occurred in the pattern high - level of northwest flow, the waterjumping downhill flow form taihang mountain is the key mechanism to initiate the convective, on the other hand, the terrain can induce unbalanced low - level flow, which play an importance role in generating the mesoscale gravity waves ( mgws ) by convergence and divergence in low - level troposphere

    （ 2 ）太行山對華北強對流風暴的發生有重要作用。一方面，地形可引起邊界層風場的變化，包括風垂直切變、下坡氣流和中尺度輻合線，從而對風暴的啟動、組織和移動發揮作用；另一方面，山脈背風波動和地形產生的不平衡氣流，有利於中尺度重力波（ mgws ）的產生和維持，並對下游地區強對流天氣的發展產生影響。
  12. When the low - tropospheric mpv1 < 0, mpv2 > 0 or negative mpv2 intensify, sudden rainstorm will be inclined to happen. the rainstorm usually happens in the dense section of the negative isoline of mpv1. wind and pressure field on moist isentropic surface reveals that the interaction between cold air and warm air, it successfully explains the reason why " 8

    濕等嫡面上風場和氣壓場直觀地揭示了暴雨區冷空氣擴散、暖空氣堆積及兩者在等嫡面上相遇，輻合上升產生暴雨的機制，它較好地解釋了8 . 11 」暴雨強度強，范圍相對較小的原因。
  13. Inertial instability always existed in strong inertial stability area, furthermore, acceleration field caused these two factors can give rise to air convergence and divergence in upper level, which made cyclone strengthened and precipitation enlarged. reinforced precipitation caused latent heat enlarged again, which led to inertial instability augmented

    慣性不穩定總是伴隨強慣性穩定區存在，這兩者產生的加速度場可形成高層的輻合、輻散引起氣旋加強以及降水加大，降水加強又可使潛熱進一步加大和擾動槽加強，從而導致慣性不穩定加劇。
  14. The weather system on july 5th 08bst depicted by the cloud - drift winds could be distinctively seen an anticyclone with divergence in the north and convergence in the south which was much helpful in rationally explaining the real weather process combined with some traditional methods

    由它所表示的2003年7月5日07 ? 08時的高空風場上，可以清楚地看到一個北邊輻散，南邊輻合的反氣旋環流，這些細節有效地幫助了常規方法，使其對天氣過程做出合理的診斷分析。
  15. ( d ) in the weak monsoon year, nwc lies in the northwest airflow region, west and south wind, as well as moisture transportation are remarkably reduced. except part of the first field, there is vapour flux divergenceon in nwc ( e ) in the strong monsoon years, the height field is low on the west and high on the east, west and south wind, and it ' s vapor flux transportation, are evidently boosted up. there is vapour flux conflurnce in the he first and sixth region

    （ d ）弱夏季風年，西北區高度場西高東低，處于脊前西北氣流的控制之下，西風和南風明顯減小，水汽通量輸送也大大減少，除一區的甘肅河東大部（ 30 35 n ， 101 105 e ）存在水汽通量輻合外，其它地區為水汽通量輻散（弱的輻合） 。 （ e ）強夏季風年，西北區高度場東高西低，西風和南風明顯增強，水汽通量輸送同樣顯著增強，一、三區存在大范圍的水汽通量輻合。
  16. There are two parts in this paper : firstly, a set of single doppler velocity models are presented for typical ambient windfields that include those of being uniform horizontally, macroscale convergence and divergence, which overlap warm and cold advection. which are marked by different signatures in the single doppler velocity field. the models proposed can help users identify useful information from the dopple velocity patterns

    本論文包括兩個部分：第一篇通過對典型風場的單多普勒天氣雷達徑向速度圖象進行模擬，典型風場包括水平均勻一致的風場、非均勻水平風場的大尺度運動的輻合輻散風場以及大尺度運動的輻合輻散風場與冷暖平流的迭加等。
  17. According to practice of transient electromagnetic operators, this paper will introduce a new multi - aperture transient electromagnetic method integrating a lot of simulation experiment data on the base of its primary theory and transmission rule. in the end, result shows this new method can improve so much direction of electromagnetic field that it increases lognitudinal resolving power

    本論文根據瞬變電磁法勘探工作者的實踐，利用電磁波運動學特徵在討論其基本原理和電磁波傳播規律的基礎上，結合在論文過程中進行的大量模擬實驗資料，進一步引入了多孔徑瞬變電磁發射場源，實驗結果分析證明採用瞬變電磁多孔徑發射場源改善了輻射場的方向性，提高了瞬變電磁法勘探的垂向分辨力。
  18. The hardware of the system is sum up with the purchased television aerial, agilent 8482h power sensor, dsp, oscillograph, etc. for the software part, the architecture takes advantage of the mathematical rule of both the antenna ’ s radiation field and electromagnetic field, for example, the finite - difference time - domain ( fdtd ) method

    硬體電路設計調試方面，利用購置電視天線、 aglient8482h功率傳感器和dsp 、示波器等組成系統等進行試驗。在軟體模擬中，本文重點介紹並且綜合應用了天線輻射場的計算方法和電磁場的數值計算方法? ?時域有限差分（ fdtd ）方法。
  19. The antenna can provide good omnidirectional radiation patterns for frequencies across a very wide operating bandwidth

    透過此一天線結構設計，將可在整個操作頻帶中有效改善水平輻射場型，並符合全向性場型特性之要求。
  20. The assimilation experimentation results indicate that after assimilating radar wind field of small spatial scale, mesoscale and small - scale precipitation prediction can be improved and mesoscale and small - scale information which ca n ' t appear by tradition datum can be gained, which is valuable to analyze the mesoscale and small - scale system structure ; the effect assimilating radar humidity field is n ' t obvious, which is perhaps correlation with precipitation types and assimilating time. the results also show that adding radar humidity field to initial condition at initial time can supply the gap of the regular data in reflecting the mesoscale and small - scale systems, strengthen the humidity in the initial field, and eventually help to improve precipitation. the experiment of assimilating radar wind field and radar humility field at the same time shows that vapor transportation and local vapor divergence play more significant role in causing excessively heavy rain than only high wet center

    同化試驗結果表明：同化空間解析度很高的雷達風場后，能改善中小尺度降水的預報效果，並且能夠得到常規觀測資料所不能得到的中小尺度信息，對分析中小尺度系統結構具有重要意義；同化雷達濕度場效果不明顯，可能與降水類型和同化時刻有關；而直接在初始時刻加入雷達濕度場，補充了常規資料在反映中小尺度系統方面的不足，增強了初始場中的水汽，有利於降水量的增加；同時同化雷達風場和雷達濕度場的試驗表明，水汽的輸送和局地的水汽輻合對于產生特大暴雨的貢獻遠大於僅有高濕中心的貢獻。
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