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FrequencyHoppingTechnology
在无线通信中使用跳频技术是军事通信中最主要的抗干扰手段之一, 而如果系统中能使用合适的中心频率可以快速跟踪跳频变化的带通滤波器将可以明显改善系统的抗干扰性能。文中从实际应用出发, 比较了几种可用于实现带通滤波器快速变频的方案, 选择了简单、实用的开关电容阵改变带通滤波器中心频率的方案(The use of frequency hopping in wireless communication technology is the most important anti-jamming in military communications, one of the means, and if the system can use the appropriate center frequency can be fast-tracked changes in frequency-hopping band-pass filter will be able to significantly improve the system anti-jamming性能. This paper from the actual application, the comparison of several band-pass filter can be used to achieve the rapid conversion of the program, choose a simple, practical switched capacitor array to change the center frequency of band-pass filter program)
- 2009-12-22 21:52:44下载
- 积分:1
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Winding-Temperature-Calculate
压缩机电机绕阻温度计算,包括铜线,铝线,参数包括环境温度,冷态阻值,热态阻值,计算热态绕阻温度(winding temperature)
- 2013-10-11 13:07:32下载
- 积分:1
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paper688
随着并联机构学理论的日益成熟,并联摇摆台以其大刚度、高精度和重载等优点,广泛应用于机械、航海和航天等领域。其中,以车辆模拟台的应用最为广泛。车辆在行驶过程中由于受到路况等扰动因素的影响,会产生横摇、纵倾、转艏、前冲、横移和升降共6种位姿的运动,而通过六自由摇摆台能将车辆的这些运动真实的再现出来。
本文以项目——六自由度重型摇摆台的研制为依托,在对国内外六自由度摇摆台的研究现状做了比较深入、系统分析的基础上,对车辆重型摇摆台与负载锁定结构进行了分析优化,主要的研究内容如下:
首先,对六自由度重型摇摆台进行运动学建模,分析、优化机构在六种独立姿态及部分耦合位姿情况下支撑杆的运动范围,最终确定了支撑杆合理的转角空间和上下铰链座的结构,提高了机构的运动学、动力学性能。
(With the development of theory of parallel mechanism, parallel plat quickly enters the international market for high stiffness、high precision and heavy load, which is widely used in mechanical、navigation and aviation, etc. Among these parallel plats, the vehicle simulator is the most widely used. Due to the disturbance factors of ups and downs of the different roads, vehicle has 6 degrees of freedom during its traveling movements, such as rolling、pitching、yawing、surging、swaying and heaving that can be simulated in the use of 6-DOF platform.
Based on the project of heavy platform, this paper optimizes the platform and the load locking structure after the in-depth and systematic analysis of 6-DOF parallel plat at home and abroad, the main research contents are as follows:
Firstly, this paper establish the kinematic modeling that is used to analyze the rotating range of the axis belonging to the supporting pole in many traveling conditions, such as one of six movements indepe)
- 2012-09-08 17:47:11下载
- 积分:1
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Archlab.pdf
CSAPP体系结构实验文档,通过hcl设计优化流水线处理器,令人受益匪浅(CSAPP handout)
- 2013-04-13 10:00:43下载
- 积分:1
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svd_lmmse
OFDM系统中基于奇异值分解降秩的MMSE信道估计算法,非常经典(OFDM channel estimation by singular value decomposition.pdf)
- 2010-03-12 13:56:33下载
- 积分:1
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Farrow-filter-error
用 Farrow 结构滤波器对并行采样信号进行时间误差校正, 通过 DSPBuilder 软件将设计的滤波器模型转化为硬
件语言, 利于 FPGA 实现(The Farrow filter is used to correct the time error of the parallel sampling signal, and the designed filter model is converted to hard by DSPBuilder software
Language, conducive to the realization of FPGA
)
- 2017-04-14 22:43:40下载
- 积分:1
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english
关于计算机的论文 是英文版的是比较专业的和准确的!(Paper is the English version on the computer is more professional and accurate!)
- 2011-12-19 16:33:43下载
- 积分:1
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LDPC-file2013
第四届中国卫星导航年会论文全文,有关LDPC编码在卫星导航中的应用。现在在CNKI等中文数据库,只能查看摘要,无全文!(Fourth annual meeting of China' s satellite navigation papers related LDPC coding applications in satellite navigation. Now CNKI databases such as Chinese, can only view the abstract, without the full text!)
- 2014-02-26 00:03:22下载
- 积分:1
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RF_power_amplifier_in_Digital_pre-distortion_techn
说明: 射频功放数字预失真技术研究及其FPGA实现,文中介绍了数字预失真的实现架构,介绍了QRD_RLS算法实现的相关CORDIC技术,GIVENS旋转,以及systolic阵等原理(RF power amplifier digital pre-distortion technology and its FPGA implementation, this paper describes the realization of digital pre-distortion framework introduced QRD_RLS relevant CORDIC algorithm implementation techniques, GIVENS rotation, and other systolic array principles)
- 2010-03-25 18:37:48下载
- 积分:1
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zhuangzice
双馈风力发电机转子侧励磁控制器的软件设计(Doubly-fed wind generator rotor side excitation controller software design)
- 2008-05-09 17:53:50下载
- 积分:1