mhd 中文意思是什麼

mhd 解釋
磁鈴力學
  1. On the basis of the former two - dimensions and three - components mhd numerical simulation, this paper analyses evolution of the magnetic helicity of various magnetic structures in the magnetotail

    摘要在二維三分量mhd數值模擬的基礎上，對地球磁尾不同類型磁結構的形成作磁螺度分析。
  2. Theoretical researches on solar activity, solar flare and cme were involved in many fields of foundational physics such as plasma astrophysics, magnetohydrodynamics ( mhd ) and so on. the forecast of solar activity, a main branch of space weather, was becoming more and more significant for preventing space disaster and for many aspects of space science

    探索太陽活動的規律、太陽耀斑及其伴隨cme的先兆、觸發過程及能量傳播機制等等，從理論上推動了等離子體天體物理、磁流體力學等諸多基礎理論的發展，有著重要的理論意義；而對太陽活動的預報，是國際前沿科學?空間天氣學的重要組成部分，對避免空間災害、為航空航天科學提供服務等方面，具有重大的實際應用價值。
  3. In the first part, turbulent motion in convection zone as source to generate alfven waves is studied following lighthill - stein theory, in which the turbulent source was described by nonlinear terms in mhd equations

    就是將mhd方程中的非線性項通過fourier變換轉化為湍動源項，並採用kolmogroff冪律譜來描述對流層的湍動譜。
  4. Using an ideal two - dimensional mhd model, this paper investigates the evolution of a pure flow velocity enhancement disturbance in the solar wind in the heliospheric equatorial plane ( 2 - d, 2 - component model ) and the heliospheric meridional plane ( 2 - d, 3 - component model )

    摘要採用二維理想mhd模型，分別在日球赤道面（二維二分量模型）和日球子午面（二維三分量模型）內研究太陽風中純速度增幅擾動的演化。
  5. In addition, considering the essential characteristics of the fusion - fission hybrid reactor, the preliminary analysis and research of the mhd pressure drop of liquid metal that flow through the fuel packed pebble bed - based blanket are given

    另外，基於聚變中子源驅動的次臨界清潔核能系統，針對聚變?裂變嬗變混合堆的本質特點，對液態金屬球床包層進行初步地探討和研究，進行了球床液態金屬溢流的磁流體動力學流動的建模分析和計算。
  6. The liquid metal pb - 17li flow through a packed pebble bed - based blanket is considered to be one of the blanket candidates. the mhd pressure drop of liquid metal flow through the packed pebble bed has been calculated and analyzed under various conditions including ( a ) the size of the packed pebbles ; ( b ) the ratio of occupied room by the packed pebbles to that of liquid metal ; and ( c ) whether the pebbles surface is insulated or not

    在聚變中子源驅動的次臨界清潔核能系統的科學可行性和技術現實性基礎上，對聚變?裂變嬗變混合堆的多種概念性包層進行探討，對影響液態金屬在球床包層中的mhd壓降的相關因素（包括燃料小球的大小、液態金屬與燃料小球的占空比和燃料小球表面是否絕緣）進行分析研究。
  7. With the theory of electromagnetic field and the theory of hydrodynamic, a 2 - d mathematics model of internal planar ac - mhd thruster is built

    從電磁場和流體力學的理論出發，建立了交流磁流體推進系統的二維數學模型。
  8. As a new type of ship propulsion, ac magnetohydrodynamic ( mhd ) propulsion apply alternating magnetic field through seawater, then a lorentz force will act to move the seawater and thus drive the ship to move

    磁流體（ mhd ）推進是一種新型的船舶推進方式。它利用海水中電流和磁場間的相互作用力使海水運動，其反作用力為推力，推進船舶運動。
  9. Compared with dc - mhd propulsion, ac mode has no electrode and does n ' t apply electric field to fluid directly. thus it avoids the detriment and noise caused by the air bubble generated by electrolysis, and makes the ship more quietly. these characters will help to develop a more efficient ship thruster

    與直流磁流體推進相比，交流磁流體推進方式的最大特點就是沒有電極，因此沒有電極壽命問題，消除了電極表面壓降對推進器效率的影響，也沒有電機表面電化學過程產生的不良效應，如氣泡、電解質對海水的污染等。
  10. Furthermore, asymptotic techniques to analyze large hartmann parameter flow and interaction parameter flow are employed and an analytical model has been developed for the calculations of mhd pressure drop of liquid metal flow in a packed pebble bed

    利用漸近線分析法對大hartmann參數流進行分析，給出了球床液態金屬溢流的磁流體動力學壓力損失的建模分析和計算結果。
  11. Mhd power generation

    磁鈴動力發電
  12. On the basis of mathematics model, the coupled field of alternating magnetic field and fluid field in the channel of a 2 - d ac - mhd thruster is simulated using finite element method

    在此基礎上，對平面型內磁式交流磁流體推進器的電磁場和流場的所形成的二維耦合場進行了模擬分析。
  13. Characters of the flow field of molten metal in mhd caster are s imulated and analyzed by means of numerical simulation. relationship between flow field of molten metal and the number of magnet poles, arrangement of magnet pole s, rotating velocity of magnetic field as well as helical arrangement of permanen t magnets is revealed. it can be used as reference for optimizing design of perma nent caster

    利用數值模擬對不同磁場條件下的永磁鑄機金屬液流場特徵進行了模擬分析；揭示了金屬液流場與永磁體極數、磁極排布方式、磁場旋轉速率以及永磁體螺旋式排布之間的關系，為永磁鑄機的優化設計提供了參考依據。
  14. Preliminary analysis and calculation of liquid metal pb - 17li mhd pressure drop in the blanket for the fds have been presented to evaluate the significance of mhd effect to the thermal - hydraulic design of the blanket

    針對雙冷嬗變核廢物包層液態金屬的流動特徵，進行了mhd壓降的研究計算和數值模擬，進行程序實現分析。
  15. Before reforming the code to be a mhd, the boundary condition of sss code is modified, so that we can calculate the electro - magnetic implosion of ideal conductive liner, where the magnetic field diffusion is neglected

    在進行一維磁流體力學改造之前，我們計算了磁壓驅動沒有磁擴散的理想導體內爆算例，主要是對sss程序的壓力脈沖邊界條件進行修改。
  16. Finally the magnetic field equation from maxwell ' s equations and the current circuit equation are given to complete the mhd equations

    最後進行電流迴路方程與磁流體力學方程組的耦合，並且補充電磁邊界條件，完善定解條件。
  17. The prediction of disastrous space weather is a hot topi c among solar - terrestrial physics and high technological fields. we propose that the future forecasting of the physical conditions that the violent solar disturb ance causes at the earth by propagating in solar wind depends heavily on the num erical method. this paper analyses the existing problems we are facing in the num erical prediction of disastrous disturbance events in solar - terrestrial space, an d then gives some suggestions for future study. for such a purpose, a six step sol ution method is developed to deal with one - dimensional symmetric interplanetary shock dynamics. it should be point out that that initialization of fully self - con sistent 3 - d mhd codes considering the solar - interplanetary - geomagnetic coupled r elations with initial - boundary values at 1r of the global output of solar pl asma and magnetic field using available solar observations is an essential requi rement in space weather operational codes for forecasting purposes

    空間災害性天氣的預報是日地物理學界及高科技領域的熱門話題.未來預測太陽劇烈擾動所造成的行星際風暴到達地球空間的狀態勢必藉助于數值方法.淺析了空間災害性擾動事件數值預報存在的問題及未來設想，針對這一目的對一維球對稱問題提出了處理行星際激波的6步求解方法，指出未來空間災害性擾動事件預報模式應是一個基於三維的以真實太陽風為背景自洽建立起來的、以太陽等離子體輸出及磁場全球結構為初邊值、太陽、行星際、地磁因果耦合模式
  18. Simulation to mhd channel based on ansys method

    的磁流體發電通道模擬分析
  19. Perovskite - type complex oxides of la1 - xcaxcro3 compositions are attracting growing attention because of their superior electronic conductivity and excellent chemical stability in both oxidizing and reducing atmospheres, which makes them promising candidate materials for many important applications, such as interconnectors for solid oxide fuel cells ( sofc ), heating elements for high temperature furnaces, and current collecting electrodes in magneto - hydrodynamics ( mhd ). in this dissertation, the gnp ( glycine - nitrate process ) method has been employed to synthesize la1 - xcaxcro3 oxides. the synthesis and preparation, sinterability, electrical conducting properties and thermal expansion properties of la1 - xcaxcro3 oxides have been investigated

    本文採用gnp （ glycine - nitrateprocess ）法制備了la _ （ 1 - x ） ca _ xcro _ 3材料，對制備方法與工藝參數、材料燒結性能、電性能以及熱膨脹性能進行了研究，分析了ca ~ （ 2 + ）含量、粉體顆粒形態對材料燒結行為、燒結緻密化溫度的影響，並研究了ca ~ （ 2 + ）含量、粉體顆粒形態對材料晶體結構、顯微結構和物理性能的影響，其目的在於為該類高溫電子導體的進一步研究利應用提供實驗和理論依據。
  20. The multi - functional blanket for waste transmutation and fuel production has been developed. based on studies for feasibility and reliability of fusion - driven hybrid reactor, the conceptual design of dwtb is presented, especially the analysis activities of liquid metal mhd pressure drop in the fds blanket that is included into thermal - hydraulic analysis

    本論文針對雙冷嬗變核廢物包層設計，從液態金屬磁流體動力學觀點出發，提出與液態金屬mhd效應相關的研究設計概念，並對雙冷嬗變核廢物包層中液態金屬mhd壓降進行分析研究和模擬計算，評價其可行性。
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