Performance Comparison of Two On-Demand Routing Protocols Depends on Traffic Density by Using UWB-IR as Pyhisical and MAC Layer at Outdoor Peer to Peer Sensor Network
标签: Performance Comparison On-Demand Protocols
上传时间: 2017-05-28
上传用户:三人用菜
Double Density Wavelet Soft
标签: Density Wavelet Double Soft
上传时间: 2014-01-27
上传用户:l254587896
it s low density parity check coding file
标签: density coding parity check
上传时间: 2014-01-02
上传用户:杜莹12345
bi directional anchored/headed lists libraray
标签: directional anchored libraray headed
上传时间: 2013-12-25
上传用户:xcy122677
his procedure is the power spectral density of the simulation, 3 signal source on the specific circumstances, see the "modern digital signal processing" Introduction to the first volume, P202, Exercise 5. Experimental Methods
标签: the simulation procedure spectral
上传时间: 2014-01-17
上传用户:金宜
kde全称是kernel density estimation.基于核函数的概率密度估计方法。是模式识别中常用的算法之一
标签: estimation density kernel kde
上传时间: 2014-11-26
上传用户:a6697238
Features a unique program to estimate the power spectral density. The spectrum containing all significant details is calculated from a time series model. Model type as well as model order are determined automatically from the data, using statistical criteria. Robust estimation algorithms and order selection criteria are used to obtain reliable results. Unlike in FFT analysis, where the experimenter has to set the amount of smoothing of the raw FFT, the right level of detail is assessed using the data only.
标签: containing Features estimate spectral
上传时间: 2014-02-09
上传用户:daguda
Low density parity check matrix
标签: density parity matrix check
上传时间: 2014-01-08
上传用户:yt1993410
Tableau:数据可视化之极速BI,书籍及释义
上传时间: 2020-05-11
上传用户:starnny
双向DC/DC变换器(Bi-directionalDC/DCconverters)是能够根据需要调节能量双向传输的直流/直流变换器。随着科技的发展,双向DC/DC变换器的应用需求越来越多,正逐步应用到无轨电车、地铁、列车、电动车等直流电机驱动系统,直流不间断电源系统,航天电源等场合。一方面,双向DC/DC变换器为这些系统提供能量,另一方面,又使可回收能量反向给供电端充电,从而节约能量。 大多数双向DC/DC变换器采用复杂的辅助网络来实现软开关技术,本文所研究的Buck/Boost双向的DC/DC变换器从拓扑上解决器件软开关的问题;由于Buck/Boost双向DC/DC变换器的电流纹波较大,这会带来严重的电磁干扰,本文结合Buck/Boost双向DC/DC变换器拓扑与磁耦合技术使电感电流纹波减小;由于在同一频率下不同负载时电流纹波不同,本文在控制时根据负载改变PWM频率,从而使轻载时的电流纹波均较小。 本文所研究的双向DC/DC变换器采用DSP处理器进行控制,其原因在于:目前没有专门用于控制该Buck/Boost双向DC/DC变换器的控制芯片,而DSP具有多路的高分辨率PWM,通过对DSP寄存器的配置可以实现Buck/Boost双向DC/DC变换器的控制PWM;DSP具有多路高速的A/D转换接口,并可以通过配合PWM完成对反馈采样,具备一定的滤波功能。 本文所研究的数字双向DC/DC变换器实现了在Buck模式下功率MOSFET的零电压开通及零电压关断,电感电流的交迭使其电感输出端电流纹波明显变小,轻载时PWM频率的提升也使得电流纹波变小。
上传时间: 2013-06-08
上传用户:cy_ewhat