非穩定流動 的英文怎麼說

中文拼音 [fēiwěndìngliúdòng]
非穩定流動 英文
nonsteady flow
  • 非 : Ⅰ名詞1 （錯誤） mistake; wrong; errors 2 （指非洲） short for africa 3 （姓氏） a surname Ⅱ動詞1 ...
  • 穩 : 形容詞1 （穩定; 穩當） steady; stable; firm 2 （穩重） steady; staid; sedate 3 （穩妥） sure; rel...
  • 定 : Ⅰ形容詞1 （平靜; 穩定） calm; stable 2 （已經確定的; 不改變的） fixed; settled; established Ⅱ動詞...
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 穩定 : 1 （使穩定） stabilize; steady 2 （穩固安定） stable; steady 3 （物質的性能不易改變的作用） stabi...
  • 流動 : 1. （液體或氣體移動） flow; run; circulate 2. （經常變換位置） going from place to place; on the move; mobile
  1. Studies of nonparallel stability of boundary layer

    邊界層流動的非平行穩定性研究
  2. As the world economy goes to reginonalization, collectivization, the district economy is be coming more and more important in the world economy. the members of all the district economy organization make the inner - reginal trade, the movement of elements, the speed of economy increasing constantly because of the advantages of arens, resources and mutual supplements of economy structures, meantime, the members, who is not in the exclusivism andtrade protectionism, so china must make strong economic relationship between the countries ane areas nearby in order to develop the economy stably and taking eonomic cooperation and join the system of inter - reginal economy cooperation

    隨著世界經濟呈現出區域化、集團化的趨勢，區域經濟圈在世界經濟中所佔的地位也在逐步提高，各區域經濟組織成員由於地緣、資源優勢、經濟結構互補等原因，使得區域內部的貿易、要素流動、經濟增長速度不斷增加，同時，對于區域經濟組織外的非成員則不可避免地造成排外主義及貿易保護主義。所以，對中國而言，為促進經濟的持續穩定增長，就必須加強與周邊國家及地區之間的經濟往來，同時要進行全方位、多層次的區域性經濟合作，進而參與到國際區域經濟合作的體系中。
  3. Second, we discuss the influence of environmental referance potential temperture and thermal wind on mesoscale symmetric instability. we find the expression of disturbance stream function and criterion of symmetric instability by analytical method and conclude that change caused by environmental referance potential temperture with height and thermal wind make critical richardson number and disturbance critical half - wave length of symmetric instability larger, that is to say, they benefit the occurance of symmetric instability. third, we study nonlinear perturbation analysis of mesoscale vertical circulation and evolution equation by means of f - plane. non - hydrostatic balance and filiter model

    第二，討論了環境位溫與熱成風因子對中尺度對稱不穩定的影響。運用解析的方法求出了擾動流函數的表達式和對稱不穩定的判據，發現環境參考位溫隨高度的變化與熱成風因子使得對稱不穩定臨界理查遜數及擾動的臨界半波長都變大，這有利於對稱不穩定的發生。第三，採用f平面、非靜力平衡、濾聲波模式，討論了中尺度垂直環流非線性攝動分析及演變方程。
  4. Based on differential geometric theory, a novel nonlinear modulation strategy for multi - iii infeed hvdc systems to enhance the transient stability of ac system in the presence of large disturbances is presented in this paper

    針對大擾動情形，提出了一種用於改善多機交直流混合電力系統（有多條直流線路落點于其中）暫態穩定性的非線性調制策略。
  5. In order to investigate the unsteady flow frequency domain performances of an axial flow compressor at different mass flow, rotating speed and blade row spacing, plus inlet flow distortion, and considering aerodynamic characteristics and stability of the compressor, the low speed research compressor ( lsc ) at college of energy and power in nuaa is used to carry out the experiment studies. a large amount of test data has been gained through dynamic pressure transducers embedded in the stator blades at the tip, middle and hub section, then fast fourier transform algorithm ( fft ) is applied to calculate the frequency data

    為探討軸流壓氣機在工作流量、工作轉速及動?靜葉排軸向間距變化時的葉片排流場非定常頻譜特性變化規律，並耦合進氣畸變的影響，同時與壓氣機氣動性能和氣動穩定性相關聯，作者利用南京航空航天大學能源與動力學院的低速大尺寸軸流壓氣機（ lsc ）試驗器，採取在靜子葉片表面埋入動態壓力傳感器的實驗方法，對葉尖、葉中和葉根三個截面的動態壓力進行了測量，獲得了大量的可靠的實驗數據。
  6. Established in 1994, xinyi meter plant ( shanghai xinyi meter co., ltd ) is specialized in the development and production of simulation current meters and voltmeters. they are widely used in collaboration with mili - tary equipment, various electronic communication facilitles, measuring instruments and auto control equipment to display all kinds of quantity of electricity and other readings. xinyi meters are of plenty of assortments and complete functions. they sell well in the domestic and overseas markets and appeal to the customers with their stable and reliable quality, considerate service and sound market reputation

    新藝儀表廠（上海新藝儀表有限公司）創辦於1994年，主要開發和生產門類齊全，品種繁多的模擬和安裝式電流、電壓表，廣泛用於軍工配套和各種電子通迅設備、測量儀器和自動化控制設備上，以顯示各種電量和非電量、新藝儀表品種多，功能齊全，以其穩定可靠的質量、周到的服務、良好的市場信譽行銷國內外、深受用戶的歡迎。
  7. To encourage and sustain regional and subregional mechanisms for preventing conflict and promoting political stability, and to ensure a reliable flow of resources for peacekeeping operations on the continent

    鼓勵建立和維持防止沖突和促進政治穩定的區域和分區域機制，並確保非洲大陸的維持和平行動獲得可靠的資源流入量。
  8. This paper takes a high quality servo motion controller as the core component. it discusses the track interpolation control principle, its algorithm and develops various sub - programs by dynamic link libraries. first, it designs a nonlinear pid controller based on those sub - programs to solve the contradiction between stabilization and quickness in order to improve the controlling effects

    本論文以高性能伺服運動控制器為核心元件，在論述軌跡控制的插補原理及其演算法實現流程並使用動態連接庫編制出各種插補功能子程序的基礎上，首先設計了一種非線性pid控制器，以克服穩定性和快速性之間的矛盾，達到改善控制效果的目的，並通過模擬實驗對其響應效果加以驗證。
  9. This paper studies nonlinear dynamic problems of tall building structures, first, constitutes linear dynamic equation and elasto - plastic dynamic equation of structure by using qr method, later, solves the dynamic equation by using spline unconditional stable algorithm, last, programs corresponding computer programs with c program language, and calculates some example and a tall building in constructing the courses and the results prove that qr method is not only simple in calculating and fast in constringency rate, but also precise, that qr method is a effective and economic new method

    本文研究高層建築結構彈塑性動力問題，先利用qr法建立了結構線性動力方程及彈塑性動力方程，然後利用樣條無條件穩定演算法求解了動力方程，最後利用c語言編寫了相應的計算程序，計算了一些例題和分析了一個工程實例。 qr法在理論上及方法上不用有限元法及流動法則，避免了這些傳統方法在分析非線性問題時所帶來巨大困難的缺陷。計算結果表明，這種方法不僅計算簡便，而且精度高，收斂速度快，是一種經濟有效的新方法。
  10. It is important for the design of air cooling steam turbine and the performance and stability of turbine to study unsteady flow mechanism in design and off - design state

    深入了解透平葉片在設計狀態和高背壓條件下的非定常流動機理，能更好設計空冷汽輪機以及提高葉輪機械的性能和穩定性。
  11. With the development of oil fields, many old reservoirs in the east of china enter the high water - bearing development period. sustaining a high and stable production rate faces severe challenge. the key to preserve oil output in high water cut period is dependent upon the understanding degree to the properties of residual oil distribution. from 1980 ' s, while the study of the reservoir flow unit was proceeded alongside, it has been more widely utilized to characterize reservoir feature and remnant oil distribution. study of reservoir flow unit plays. both theoretically and practically. an important role in recognizing reservoir heterogeneity. performing a high - definition reservoir delineation and understanding the distribution of the remnant oil in the reservoir

    隨著油田的不斷開發，我國東部許多老油田已進入高含水期開采階段，保持油氣產量的穩定面臨嚴竣的挑戰，而高含水油田穩產的關鍵取決于對剩餘油分佈的認識程度。八十年代以來，隨著對儲層流動單元研究的不斷深入，它越來越廣泛地被應到油藏描述和剩餘油研究中來，流動單元研究對于認識儲層的非均質性、提高油藏描述精度、搞清剩餘油分佈具有重要的理論意義和實際意義。
  12. Based on netomac, a software package for power system simulation, the model and algorithm of pre - dispatch schedule in generation markets, excitation system parameter setting, and power system small signal stability anaylsis are studied in this thesis. the main work is as follows : a model of pre - dispatch schedule is proposed, whose target is to minimize the market purchasing price ( mpp ) in the whole pre - dispatch period. then according to the characteristics of pre - dispatch schedule, the model of pre - dispatch schedule is simplified to minimize the mpp in each pre - dispatch time, and a three - step algorithm of pre - dispatch schedule is designed : dealing with the optimal problem in the whole period of pre - dispatch with static planning method, solving the problem of combination of machines with pr1 method, resolving problem of optimal power flow ( opf ) with modified powell method

    本文基於netomac模擬軟體，以發電市場預調度計劃模型及演算法、勵磁系統參數整定和電力系統小擾動穩定性分析為研究內容，主要做了以下工作：建立了以整個預調度計劃周期內的市場購電價格最小為目標的發電市場預調度計劃模型，並根據預調度計劃問題狀態數多、變量多、混合整數、非解析的特點，將預調度計劃模型的目標函數簡化為各時段的市場清算電價最小，設計了三段式預調度演算法：用靜態規劃法求解整個預調度計劃周期內的優化問題；用優先級法求解機組組合問題；用改進的powell法求解最優潮流問題。
  13. According to the physical model, a mathematical model and computational method were proposed. an axially symmetric transient thermal conduction equation was put forward, which included material pyrolysis, pyrolysis gas flow and chemical reaction in charred layer. chemical reaction was controlled by chemical dynamics, and the reaction rate was computed using arrhenious equation

    針對物理模型提出了相應的數學模型和數值計算方法，在材料內部建立了二維軸對稱的非穩態導熱控制方程，其中加入了材料熱解、熱解氣體流動以及炭化層內的化學反應等因素的影響，化學反應由化學動力學控制，通過arrhenius公式確定其反應速率。
  14. Vanadium is important and valuable in steel - making, electronic production and national defence industry etc. now, the operation pattern of refining vanadium in our nation is based on human experiences, and the automation degree is still at a low level. operation mode based on human experiences is one of the main reasons make the quality of semi - steel and vanadium product unstable. in developed contury such as russian, static model was used to control the process of vanadium refining

    我國目前的轉爐提釩為人工操作模式，由操作人員根據經驗和感覺進行操作，自動化水平低，存在著釩渣質量和半鋼質量不穩定的問題；在國外，俄羅斯等一些國家已經在使用靜態模型對提釩過程進行控制，取得了較好的效果，但是這些模型大都是根據復雜的物理化學規律研製的機理模型，要求有非常穩定的生產流程和工藝條件，對于鐵水成分、生產設備等變化的適應性差，不但移植困難，而且模型價格異常昂貴。
  15. The additional sub - scale flux is mainly determined by the average grid value, coefficient of variation and correlations among the meteorology parameters. ( 2 ) the additional sub - scale turbulence flux is composed by two parts, one part is induced by the correlations among the transfer coefficient, surface temperature and soil humidity, another is caused by non - line relationship between the transfer coefficient and roughness, stability

    （ 2 ）非均勻分佈引起的附加次網格地表湍流通量主要由兩部分組成：一是地表次網格上輸送系數和地表溫度、濕度的相關項，另一是由於模式中計算整體輸送系數時，整體輸送系數是地表粗糙度和穩定度的非線性函數所造成擾動項。
  16. ( 2 ) used the predecessors " research achievements for reference, an experimental provision by which relationship between capillaiy pressure and saturation and relationship between unsaturated permeability and capillary pressure of fracture can be determined simultaneously is developed for the first time. experiment of simplified fracture model on the provision is done

    借鑒前人的研究成果，基於動力法原理（即逐次建立水相和氣相之間的穩定流動狀態） ，首次研製出了一套可同時測定單裂隙毛細壓力飽和度以及非飽和滲透系數毛細壓力關系的實驗裝置。
  17. Abstract : the 2 - d unsteady flow field calculating program has been developed. with this program, the flow processes have been calculated in pool

    文摘:開發了二維非穩定態流場計算軟體，應用該軟體計算了明渠中蓄水池內的非穩定態流動過程
  18. Owing to unsteady ship driving power, vibration of ship body, sealing function of seal part and variable stern flow companying with rotating propeller, the unsteady force results to vibration of ship shaft, which makes the oil film of stern journal bearing vibrate

    由於船舶動力的非穩定性、船體的振動、尾軸密封裝置的密封作用及螺旋槳的不均勻伴流作用，導致尾軸振動，使得尾軸承潤滑油膜渦動。
  19. In this thesis work, a 1 - d hydraulic transient model and a 2 - d compressible flow model with the large eddy simulation approach have been applied to analyse the hydrodynamic process of the unsteady separated flow. prototype observation data of gezhouba shiplock no. 3 has been used to verify the computational results. it has been found that two different types of flow regime - stably - varying and strongly - oscillating regimes - could occur in the radial gate tunnel

    本文採取將一維非恆定流模型與二維可壓縮流一大渦模擬模型相結合的方法，分析了急變分離流的水動力學特性，並利用葛洲壩三號船閘的原型觀測資料驗證了數值模型的可靠性，發現閥門段存在平穩變化型和劇烈振蕩型兩種不同的流態，並詳細計算、分析了它們的流動特徵
  20. The paper solved unsteady groundwater flow equation with the mentioned disperse pattern and the results have shown its stabilize astringency. the method was applied to manipulate groundwater in shuishy area, dalian and got satisfied results. this method can also be applied in other relevant fields

    本文用它求解非穩定流地下水運動方程，並證明了演算法穩定性及收斂性；還用這種方法對大連水師營地區地下水運動狀況進行了數值模擬，且取得了較好的效果，此法也可在其它類似計算中推應用。
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