shift select 中文意思是什麼
shift select
解釋
2位選擇-
Select the eliptical marquee tool and draw a circle 242 242 pixels while holding shift to get a perfect circle. position this circle around the first circle
用」橢圓選擇工具」並按住」 shift 」畫一個」 242 242 」像素的正圓.並把這個正圓放在第一個正圓正後方 -
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。 -
Can shift to an earlier date partly reimbursement, every time reimbursement specified amount must be 10 thousand yuan integer after reimbursement of the part before times ; deals with ; to carry all right to the loan of loan, can select the reimbursement specified number that reduces every months, also can choose to shorten ; of loan fixed number of year still borrows pair of draw money accumulation fund to was not affected ahead of schedule
可以部分提前還款，每次還款額必須是一萬元的整數倍;至貸款的放款行辦理;提前部分還款后，可以選擇減少每月的還款額，也可以選擇縮短貸款年限;提前還貸對支取公積金沒有影響 -
Select multiple controls by using either shift click or ctrl click. using shift click, the first control selected is the dominant control when aligning or manipulating the size
當對或操控大小時，如果按住shift鍵並單擊，則第一個選定的控制項是主導控制項。 -
To select multiple tests, use shift click and ctrl click
若要選擇多個測試，請使用shift +單擊和ctrl +單擊。 -
You can select multiple tests by using shift click and ctrl click
通過使用shift +單擊和ctrl +單擊可以選擇多個測試。 -
Select the primary - key column or press shift select to select multiple columns for a multi - column primary key, right - click the selection, and then click set primary key
選擇主鍵列（或按shift +選擇，為多列主鍵選擇多個列） ，右擊所選內容，然後單擊「設置主鍵」 。 -
Use shift and ctrl keys to select multiple files
Q .如何下載ftp站點的整個目錄 -
Down link channel of new generation space tt & c system generally select qpsk as its modulation mode. firstly, carrier synchronization of qpsk is studied in the thesis, and then the key question - carrier synchronization in low snr and severe doppler frequency shift is systemic analyzed. in addition, different existing project are analyzed and compared
新一代航天測控系統的下行通道一般選擇qpsk作為其信號調制方式，本文首先研究了qpsk的載波同步問題，對其中的關鍵問題? ?低信噪比及大多普勒頻移情況下的載波同步進行了系統的分析，對現有的不同方案進行了分析與比較。 -
To select multiple fields, click a field next to the hyperlink field, hold down shift, and then use the arrow keys to select all necessary fields
如果要選定多個域，請單擊「超級鏈接」域旁邊的域，按住shift鍵，然後使用箭頭鍵選定所有所需的域。
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