starting vector 中文意思是什麼
starting vector
解釋
起始向量-
( 2 ) at translation level plant mutual sequence of starting translation aaca was added to start codon of t - pa gene by pcr ampliation and plant expression vector pbet was constructed
（ 2 ）在翻譯水平上通過pcr擴增的方式在t - pa基因起始密碼子處添加了植物翻譯起始共有序列aaca ，構建了植物表達載體pbet 。 -
( 3 ) at post - translation level plant mutual sequence of starting translation aaca and eukaryotic secretory signal peptide sequence was added to 5 ' - flanking region of t - pa gene and kdel ( sequence located to endoplastic reticulum ) to 3 ' - flanking region by pcr amplication and plant expression vector pbemt was constructed
（ 3 ）翻譯后水平通過pcr擴增的方式在t - pa基因5端添加了真核分泌信號肽序列和植物翻譯起始共有序列aaca ，在3端添加了內質網定位序列kdel ，構建了植物表達載體pbemt 。 -
Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent
本文首先介紹了異步電機的數學模型，在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理，採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹，詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究，包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時，選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量，解決了扇區切換時的矢量突變問題。 -
Sensorless vector control, high starting torque
1 .無感測向量控制，啟動轉矩高 -
A novel algorithm is presented to derive a compact multi - level mixed polarity reed - muller form mmprmf starting from a given fixed polarity truth vector. the results show that a significant area improvement can be made compared with published results
其原理是一個n變量的fprm邏輯函數有2 n個極性，不同的極性對應不同的邏輯表示，通過極性收縮找出最佳極性對應的最簡函數而實現邏輯優化。 -
Block motion estimation using full search is computationally intensive, many fast algorithm have proposed to reduce the computation at the expense of less accuracy of motion estimation. in this paper, we present a new fast and efficient search algorithm for block motion estimation. the proposed algorithm is based on the ideas of predicted starting search point, subsampled block distortion measure, center - biased distribution of motion vector, multiple - candidate diamond search. from the experimental results, the proposed algorithm is superior to many other well - known fast algorithms in both quality performance and computational complexity
演算法採用多步搜索方法，利用相鄰塊之間的運動相關性，選擇反映當前塊運動趨勢的預測點作為初始搜索點用子采樣塊匹配失真度量來減少計算量利用運動矢量的中心傾向的分佈特性，用多侯選點鉆石形狀搜索方法來提高運動估計的速度和準確性。
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