Affine Invariant moments
上傳時間: 2017-05-20
上傳用戶:417313137
Affine Invariant moments using Graph method
標簽: Invariant moments Affine method
上傳時間: 2017-05-20
上傳用戶:ippler8
This programs connect to Weigh scale. & shows the actual value.
標簽: programs connect actual Weigh
上傳時間: 2014-01-06
上傳用戶:aysyzxzm
LDPC 譯碼器 function [vhat]=decode_ldpc(rx_waveform,No,amp,h,scale) [vhat]=decode_ldpc(rx_waveform,No,amp,h,scale)
標簽: decode_ldpc rx_waveform vhat function
上傳時間: 2014-01-13
上傳用戶:fxf126@126.com
scale-free network model, Abnormally large value(s) may cause long processing
標簽: scale-free Abnormally processing network
上傳時間: 2014-01-05
上傳用戶:watch100
This code compress the image using wavelets. Both gray scale and RGB images can be applied and some
標簽: and compress wavelets applied
上傳時間: 2017-08-15
上傳用戶:思琦琦
To meet the future demand for huge traffic volume of wireless data service, the research on the fifth generation (5G) mobile communication systems has been undertaken in recent years. It is expected that the spectral and energy efficiencies in 5G mobile communication systems should be ten-fold higher than the ones in the fourth generation (4G) mobile communication systems. Therefore, it is important to further exploit the potential of spatial multiplexing of multiple antennas. In the last twenty years, multiple-input multiple-output (MIMO) antenna techniques have been considered as the key techniques to increase the capacity of wireless communication systems. When a large-scale antenna array (which is also called massive MIMO) is equipped in a base-station, or a large number of distributed antennas (which is also called large-scale distributed MIMO) are deployed, the spectral and energy efficiencies can be further improved by using spatial domain multiple access. This paper provides an overview of massive MIMO and large-scale distributed MIMO systems, including spectral efficiency analysis, channel state information (CSI) acquisition, wireless transmission technology, and resource allocation.
標簽: Large-scale Antenna Systems
上傳時間: 2020-05-27
上傳用戶:shancjb
The 9th International Conference on Large-Scale Scientific Computations (LSSC 2013) was held in Sozopol, Bulgaria, during June 3–7, 2013. The conference was organized and sponsored by the Institute of Information and Communication Technologies at the Bulgarian Academy of Sciences.
標簽: Large-Scale Scientific Computing
上傳時間: 2020-06-10
上傳用戶:shancjb
RDHP-1901 - SCALE-iDriver SIC1182K的通用基板:下載設計
上傳時間: 2022-07-08
上傳用戶:kent
應用于電動汽車驅動領域的永磁同步電機交流驅動系統是由永磁同步電機、電力電子技術和控制技術相結合而形成的新型交流驅動系統。因其具有良好的運行性能而成為當代電氣傳動領域研究的熱點之一。 永磁同步電機是一個多變量、非線性、高強耦合的系統,其輸出轉矩與定子電流不成正比,而是復雜的函數關系,因此要得到好的控制性能,需要進行磁場解耦。矢量變換控制技術正好適用于永磁同步電機的這種特點。 本文在數字電機控制專用DSP芯片TMS320LF2407的基礎上,以永磁同步電機為研究對象,對其矢量控制技術進行了研究和設計。 首先課題根據永磁同步電機實際物理模型,分析推導得到了永磁同步電機的三相靜止坐標系下及兩相旋轉坐標系下的數學模型。 接著課題對永磁同步電機運行特性進行了分析和研究。在此基礎上,課題提出了一種新型的永磁同步電機矢量控制系統,在這個系統上,課題提出了應用不同矢量控制策略的矢量控制方法,并對其做了仿真驗證。 結果表明,課題設計的系統以及應用不同矢量控制策略的矢量控制方法準確可行。 這個控制系統便于實現多種矢量控制方法,為永磁同步電機擴速增效提供了理論平臺。 在理論分析、仿真通過基礎上,課題對驅動系統的硬件和軟件兩個方面進行了具體的設計。 課題完成了DSP控制系統關鍵硬件電路的設計,并設計制作了一塊應用SCALE模塊的IGBT驅動電路,此驅動電路響應迅速、抗干擾性強,驅動性能優越。此外,課題完成了永磁同步電機矢量控制系統全數字化設計,調試通過了速度位置檢測、電流檢測、PI調節、坐標變換等應用模塊。 課題最后對整個系統的做了全面的總結,并對今后的工作方向進行了展望。
上傳時間: 2013-06-22
上傳用戶:firstbyte