矢勢 的英文怎麼說

中文拼音 [shǐshì]
矢勢 英文
vector potential
  • 矢 : Ⅰ名詞1. （箭） arrow 2. （尿） excrement; dung; feces 3. （姓氏） a surname Ⅱ動詞（發誓） vow; swear
  • 勢 : 名詞1 （勢力） power; force; influence 2 （一切事物力量表現出來的趨向） momentum; tendency 3 （自...
  1. In this paper a kind of cardio - cerebral arterial bifurcation vessel hemodynamic characteristics are studied with the boundary element method, and the blood flowing velocity vector distributions have been calculated. in addition, the flow field distribution and the pressure on the particle surface are also calculated, when there is flow - round particle at the place of bifurcation, the move tendency of the particle is judged, the possible reasons of causing the atherosclerosis, thrombus, angioma are analysed

    本文用邊界元方法研究了一類典型心腦動脈分支血管中血液流動的流體動力特性，計算了分支血管血液流動的速度矢量分佈，同時計算了分支附近有多個顆粒狀繞流物時血液的流場分佈，及顆粒物所受壓力狀況，給出了顆粒物的運動趨勢，分析了引起粥樣斑塊病變、血瘤、血栓的可能原因
  2. Adopting the assummation that the quark interaction is the sum of the usual one - gluon direct exchange and the mixture of linear scalar and vector potentials, we structure the relativistic corrections of order v2 / c2to the cornell potential, including the annihilation potential for the quark and antiquark of the same favors which plays the same role with the one - gluon direct exchange at short distances. the effects of the relativistic corrections on the hyperfine splittings of quarkonium states are discussed, and a good fit to the available experimental data is obtained on heavy quarkonium mass spectra

    采納庫侖勢源於單膠子直接交換，而線性禁閉源於標量和矢量的混合，同時考慮在短程區域與單膠子直接交換起同樣作用的同味正反夸克的湮滅，構造了靜態夸克-反夸克勢到v ~ 2 c ~ 2級次的完全相對論修正，並擬合計算了重介子偶素的能譜，討論了相對論修正對重介子偶素能級分裂的作用。
  3. Vector meson dominance model

    矢量介子優勢模型
  4. Part ii the author discusses the influences that china ' s wto entry will bring to picc yancheng branch through the analysis of domestic and foreign economic enviroment and chances and challenges that pice yancheng branch will face the aurhor concludes that the situation is critical after china ' s wto entry. the author also predicts the prospects of picc yancheng branch

    第二章入世對鹽城人保的影響，重點論述了入世對鹽城人保的影響，文章試圖從入世后鹽城人保所處的國際國內經濟環境、面臨的機遇和挑戰等方面系統論述入世后鹽城人保形勢緊迫的觀點，同時對入世后鹽城人保的發展趨勢進行了預測，以期有的放矢。
  5. For the bldcm which has a pseudo - sinusoidal back - emf waveform, this dissertation presents a svpwm control method using six discrete position signals for minimizing the torque ripple. the main aspects for the implementation of this method are analyzed, including the initial orientation of the voltage vector, reasonable choice of the impedance angle and the advance commutation angle, and estimation of the successive rotor positions

    針對反電動勢類似正弦的準正弦波反電動勢無刷直流電動機，本文提出一種基於六個離散位置信號的自同步svpwm （電壓空間矢量法）控制方法，用以削弱電磁轉矩脈動，分析了實現這種方法的主要控制環節，包括起動時電壓空間矢量的初始定位，阻抗角與電流超前角的合理選擇以及連續轉子位置的估計等。
  6. There are two kinds of retrieval model, full text retrieval and content retrieval, and the vector space model ( vcm ) of the latter is a widely - used method with better effect. the best excellence of vcm is the predominance of knowledge presentation, which expresses documents with vectors in vector space and changes the comparability issue to the distance of vectors, and thus reduces the complexity of documents matching. however. we can not affirm the absolute effect of it, and in this thesis we prove its nonproficiency through experiments

    向量空間模型最大的優點在於知識表示方法上的巨大優勢，用n維空間的向量表示文檔，用向量之間的夾角表示文檔的相似度，從而將文檔信息的匹配問題轉化為向量空間中的矢量匹配問題，將難以計算的文字量化成很容易計算的實數，使問題的復雜性大大減小。但是，並不能夠說目前的向量空間模型是最理想的，本文通過實驗證明了vcm表達信息的不精確性。
  7. In the tour information system vector chart and the traditional ordinary traveling map compares, the main superiority lies in : not having the map sheet limit ; the current situation good ; manifestation diversification

    旅遊信息系統中的矢量化圖與傳統紙質普通旅遊地圖相比，主要優勢在於:無圖幅限制;現勢性好;表現形式多樣化。
  8. What modern electromagnetic field theory studies is the electromagnetism interaction between an electromagnetic wave that has the quantum characteristic and the matter that has the classic characteristic. we re - know the quality of substance of the electromagnetic field vector a from the theory that the electromagnetic field is the

    總之，本文採用從點到面、由淺入深的方式，以「場」這個重要概念作為核心，分別對電荷、電流間的相互作用，現代電磁場理論，電磁場矢勢物質性這幾個方面進行討論、分析。
  9. In this article, introduce the important meanings of a - b effect, first is a have physics factors, second is wave function phase factor is connected with geometrical factor in ( b = 0, a 0 ), through a - b effect, we know : electromagnetic field vector e, b is local quantity, electromagnetic potential a, is global quantity, adding a, description and by the way of loop integral, electromagnetic field " effect is completely descripted

    本文介紹了有重要歷史意義的a - b效應， a - b效應揭示了兩點物理觀念的變革：一是電磁矢勢有物理效應。二是在無場強但有磁矢勢（ b = 0 ， a 0 ）的區域，波函數的相位因子與其運動空間結構有關。 a - b效應顯示； e 、 b是局域量， a 、是總體量，只有加入a 、之後的描述，並通過a的環路積分，才能對電磁場的作用做出完全準確的描述。
  10. The vector magnetic potential of a system consisting a line electric current and an infinite long magnetic dielectric column is calculated with the method of separation of variables and method of images, it is pionted out that the vector magnetic potential of a system consisting a line electric current and a magnetic dielectric plane, an ideal paramagnetic column, a superconductor column, and a line electric current in homogeneous magnetic field can all be deduced from our calculation

    摘要用鏡象電流法和分離變量法計算了線電流與無限長磁介質圓柱系統的磁矢勢，指出線電流與無限大磁介質分界平面、線電流與超導體圓柱、均勻外磁場中有磁介質圓柱系統時的磁矢勢都可以由線電流與磁介質圓柱系統的磁矢勢的極限情形給出。
  11. Thirdly, designs the index system of nanjing ’ s environmental carrying capacity and uses hierarchy and vector analytical method to research nanjing ’ s environmental carrying capacity among the years of 1997 and 2003. subsequently, the author analyzes the environmental carrying quantity, environmental carrying capacity, environmental carrying rate and their variational trends from 1997 to 2003 in detail. lastly, according to the above results, puts forward some measures to protect and advance nanjing ’ s evironmental carrying capacity

    本文圍繞著南京市環境承載力這一研究主線，首先從定性、定量兩種角度對環境承載力的國內外研究現狀進行綜述;接著介紹了環境承載力理論的基本內容和南京市自然環境、社會經濟狀況;然後切入論文的核心部分，構建了多層次的南京市環境承載力指標體系，運用層次矢量分析法對1997 ~ 2003年南京市環境承載力及其變化情況加以量化研究，並以此計算結果為依據，詳細分析了1997 ~ 2003年間南京市環境承載量、環境承載力、環境承載率的變化趨勢;最後，針對上述分析結果提出保護和提升南京市環境承載力的幾點策略。
  12. By comparison with other vq algorithms such as lbg and fcm, it is demonstrated that this algorithm can get high performance both in codehook quality and computing speed

    通過與其他矢量量化演算法（如lbg和fcm ）的比較，證明該演算法不論在生成碼書的質量還是在計算速度上具有很強的優勢。
  13. Adopting rotor field - oriented vector control methods, through which make the stator and the rotor magnetmotive forces can be kept orthogonal all along during operation of the bldcm, combining hysteresis current modulation ' s current control advantage and space voltage vector modulation ' s torque ripple attenuation advantage, then designing a sort of bldcm hysteresis current svpwm control method

    摘要研究採用轉子磁場定向的矢量控制方法使無刷直流電動機定、轉子磁勢矢量始終保持正交，結合滯環調制電流控制和空間電壓矢量調制，設計了無刷直流電動機滯環電流svpwm控制方案。
  14. First, by international comparison we can learn from other countries with advanced insurance industry and shorten the matching period of the investment - featured life insurance. second, the vigorous development of national economy, the gradual improvement of living standard, the large size of population and the main trend of life insurance together ensure the promising future of the investment - featured life insurance. the related parties should not wait and complain but actively fulfill their own obligations

    結束語在總結全文的基礎上提出本文的兩大結論：借鑒國際經驗和教訓有利於我們有的放矢的解決現有問題，創造條件，縮短投資型壽險產品與中國市場的磨合期；我國經濟發展狀況、人口構成及壽險市場發展趨勢共同構築了投資型壽險產品發展的廣闊空間，我們應對其未來充滿信心。
  15. Research result shows : i. the gps data display the tendency of northen of plateau : from south to north, the northward branch becomes small and the ratio between eastward and northward becomes big. from west to east, the eastward becomes big. 2

    青藏高原的gps速度矢量揭示了高原整體向北和向東的運動趨勢：由南向北，向北的運動分量逐漸減小，而向東與向北分量的比值則逐漸增大；由西向東，向東的運動分量逐漸增大。
  16. For the bldcm which has a neither sinusoidal nor trapezoidal back - emf, that is, for a general shape back - emf bldcm, this dissertation proposes a novel id = 0 vector control method. by this method, the iq for a constant torque to produce is calculated through coordinate transformation, and the reference iq is tracked by vector control in the dq0 frame

    對于實際反電動勢波形既非正弦又非梯形波的無刷直流電動機，提出一種新型的任意波形反電動勢無刷直流電動機的i _ d = 0矢量控制方法，通過坐標變換浙江大學博士學位佑文摘要求解產生恆定電磁轉矩所需的q軸電流，並在dqo坐標系下通過矢量控制對q軸參考電流進行跟蹤。
  17. In this paper, first, the study of the distribution of electromagnetic field, energy, power, reflection coefficient and transmission coefficient in waveguide with piecewise different dielectric constants are studied. then, the behavior of propagation of am signal and gauss pulse signal through the waveguide are simulated by magic code ， and the plots of electromagnetic field, energy, ponyting vector and their spectrums at different time and different position are obtained. and, the group velocity and energy velocity of wave packet through barrier are calculated

    從90年代開始， emig和martin 、 landauer等人研究了分段填充不同介質的波導中的電磁脈沖的傳播。在本論文中，作者首先推導出分段填充不同介質的波導中的電磁場分佈、能量、傳輸功率以及反射系數和傳輸系數的表達式，然後，採用magic程序模擬了這種波導結構中電磁波的傳播情況，得到了在不同時刻和不同位置處的電磁場分布圖、能量圖、坡印廷矢量圖以及它們的頻譜圖，並由模擬結果計算了波包穿越勢壘的群速和能量速度。
  18. Robot soccer path planning based on vector potential field

    基於矢量勢場法的機器人足球路徑規劃
  19. Besides, successfully calculating the electromagnetic four - potential in the spacetime of charged black hole expressed by the generali zed spherical coordinate and furtherly solving the h - j equation of such spacetime make it possible to get the exact description of the energy extent of nonthermal radiation particle and to study the characteristics of such black hole ' s nonthermal radiation

    另外，本文還求出了一類用扁橢球坐標表示的荷電黑洞時空中的電磁四維勢矢量，從而成功地求解了此類彎曲時空中的hh方程，得到了這種非熱輻射粒子能量范圍的精確表達式，從而對這類黑洞的非熱輻射特徵進行了研究。
  20. Abstract : first, the key magnet statuses and their pertinent mmf. position of exterior rotor brushless dc motor are described in this paper. second, the air - gap magnetic field and the armature reaction of the three - phase six - step exterior rotor brushless dc motor used in electrical bicycle are analyzed by means of mmf. vector, mmf. integration and magnetic field fem respectively. some valuable conclu - sions for designing this kind of motor are obtained

    文摘:給出了外轉子無刷直流電動機的典型磁狀態及其對應的磁勢矢量位置，並用磁勢矢量合成法、磁勢積分法及電磁場的有限元方法對電動自行車用三相六狀態外轉子無刷直流電動機的氣隙磁場及電樞反應進行了詳盡的分析，從而得到有益於該種電機設計的結論。
分享友人
分享到 Line

分享到臉書