Affine Invariant moments
標(biāo)簽: Invariant moments Affine
上傳時(shí)間: 2017-05-20
上傳用戶:417313137
Affine Invariant moments using Graph method
標(biāo)簽: Invariant moments Affine method
上傳時(shí)間: 2017-05-20
上傳用戶:ippler8
This programs connect to Weigh scale. & shows the actual value.
標(biāo)簽: programs connect actual Weigh
上傳時(shí)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(biāo)簽: decode_ldpc rx_waveform vhat function
上傳時(shí)間: 2014-01-13
上傳用戶:fxf126@126.com
scale-free network model, Abnormally large value(s) may cause long processing
標(biāo)簽: scale-free Abnormally processing network
上傳時(shí)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(biāo)簽: and compress wavelets applied
上傳時(shí)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(biāo)簽: Large-scale Antenna Systems
上傳時(shí)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(biāo)簽: Large-Scale Scientific Computing
上傳時(shí)間: 2020-06-10
上傳用戶:shancjb
RDHP-1901 - SCALE-iDriver SIC1182K的通用基板:下載設(shè)計(jì)
上傳時(shí)間: 2022-07-08
上傳用戶:kent
應(yīng)用于電動(dòng)汽車驅(qū)動(dòng)領(lǐng)域的永磁同步電機(jī)交流驅(qū)動(dòng)系統(tǒng)是由永磁同步電機(jī)、電力電子技術(shù)和控制技術(shù)相結(jié)合而形成的新型交流驅(qū)動(dòng)系統(tǒng)。因其具有良好的運(yùn)行性能而成為當(dāng)代電氣傳動(dòng)領(lǐng)域研究的熱點(diǎn)之一。 永磁同步電機(jī)是一個(gè)多變量、非線性、高強(qiáng)耦合的系統(tǒng),其輸出轉(zhuǎn)矩與定子電流不成正比,而是復(fù)雜的函數(shù)關(guān)系,因此要得到好的控制性能,需要進(jìn)行磁場(chǎng)解耦。矢量變換控制技術(shù)正好適用于永磁同步電機(jī)的這種特點(diǎn)。 本文在數(shù)字電機(jī)控制專用DSP芯片TMS320LF2407的基礎(chǔ)上,以永磁同步電機(jī)為研究對(duì)象,對(duì)其矢量控制技術(shù)進(jìn)行了研究和設(shè)計(jì)。 首先課題根據(jù)永磁同步電機(jī)實(shí)際物理模型,分析推導(dǎo)得到了永磁同步電機(jī)的三相靜止坐標(biāo)系下及兩相旋轉(zhuǎn)坐標(biāo)系下的數(shù)學(xué)模型。 接著課題對(duì)永磁同步電機(jī)運(yùn)行特性進(jìn)行了分析和研究。在此基礎(chǔ)上,課題提出了一種新型的永磁同步電機(jī)矢量控制系統(tǒng),在這個(gè)系統(tǒng)上,課題提出了應(yīng)用不同矢量控制策略的矢量控制方法,并對(duì)其做了仿真驗(yàn)證。 結(jié)果表明,課題設(shè)計(jì)的系統(tǒng)以及應(yīng)用不同矢量控制策略的矢量控制方法準(zhǔn)確可行。 這個(gè)控制系統(tǒng)便于實(shí)現(xiàn)多種矢量控制方法,為永磁同步電機(jī)擴(kuò)速增效提供了理論平臺(tái)。 在理論分析、仿真通過基礎(chǔ)上,課題對(duì)驅(qū)動(dòng)系統(tǒng)的硬件和軟件兩個(gè)方面進(jìn)行了具體的設(shè)計(jì)。 課題完成了DSP控制系統(tǒng)關(guān)鍵硬件電路的設(shè)計(jì),并設(shè)計(jì)制作了一塊應(yīng)用SCALE模塊的IGBT驅(qū)動(dòng)電路,此驅(qū)動(dòng)電路響應(yīng)迅速、抗干擾性強(qiáng),驅(qū)動(dòng)性能優(yōu)越。此外,課題完成了永磁同步電機(jī)矢量控制系統(tǒng)全數(shù)字化設(shè)計(jì),調(diào)試通過了速度位置檢測(cè)、電流檢測(cè)、PI調(diào)節(jié)、坐標(biāo)變換等應(yīng)用模塊。 課題最后對(duì)整個(gè)系統(tǒng)的做了全面的總結(jié),并對(duì)今后的工作方向進(jìn)行了展望。
標(biāo)簽: DSP 永磁同步電機(jī) 技術(shù)研究
上傳時(shí)間: 2013-06-22
上傳用戶:firstbyte
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