矢勢英文怎麼說

矢勢 的英文翻譯

矢勢 例句

1. 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。
2. 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 。
3. 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。
4. 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。
5. 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。

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