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sampling

取样是指从总体中抽取个体或样品的过程,也即对总体进行试验或观测的过程。分随机抽样和非随机抽样两种类型。前者指遵照随机化原则从总体中抽取样本的抽样方法,它不带任何主观性,包括简单随机抽样、系统抽样、整群抽样和分层抽样。后者是一种凭研究者的观点、经验或者有关知识来抽取样本的方法,带有明显主观色彩。参见“随机抽样”、“非随机抽样”。[1]
  • Easy-to-Use, Ultra-Tiny, Differential, 16-Bit Delta Sigma ADC With I2C Interface The LTC2453 is an

    Easy-to-Use, Ultra-Tiny, Differential, 16-Bit Delta Sigma ADC With I2C Interface The LTC2453 is an ultra-tiny, fully differential, 16-bit, analog-to-digital converter. The LTC2453 uses a single 2.7V to 5.5V supply and communicates through an I2C interface. The ADC is available in an 8-pin, 3mm x 2mm DFN package. It includes an integrated oscillator that does not require any external components. It uses a delta-sigma modulator as a converter core and has no latency for multiplexed applications. The LTC2453 includes a proprietary input sampling scheme that reduces the average input sampling current several orders of magnitude lower than conventional delta-sigma converters. Additionally, due to its architecture, there is negligible current leakage between the input pins.

    标签: Differential Easy-to-Use Ultra-Tiny Interface

    上传时间: 2014-01-08

    上传用户:凤临西北

  • Sequential Monte Carlo without Likelihoods 粒子滤波不用似然函数的情况下 本文摘要:Recent new methods in Bayesian simu

    Sequential Monte Carlo without Likelihoods 粒子滤波不用似然函数的情况下 本文摘要:Recent new methods in Bayesian simulation have provided ways of evaluating posterior distributions in the presence of analytically or computationally intractable likelihood functions. Despite representing a substantial methodological advance, existing methods based on rejection sampling or Markov chain Monte Carlo can be highly inefficient, and accordingly require far more iterations than may be practical to implement. Here we propose a sequential Monte Carlo sampler that convincingly overcomes these inefficiencies. We demonstrate its implementation through an epidemiological study of the transmission rate of tuberculosis.

    标签: Likelihoods Sequential Bayesian without

    上传时间: 2016-05-26

    上传用户:离殇

  • 這個檔案裡面的matlab的m函數

    這個檔案裡面的matlab的m函數,產生有效的都普勒fd隨機相關的瑞利衰減包絡,可以輸入你想要的doppler ferquecy和sampling ferquecy

    标签: matlab

    上传时间: 2013-12-21

    上传用户:cc1

  • The package includes 3 Matlab-interfaces to the c-code: 1. inference.m An interface to the full

    The package includes 3 Matlab-interfaces to the c-code: 1. inference.m An interface to the full inference package, includes several methods for approximate inference: Loopy Belief Propagation, Generalized Belief Propagation, Mean-Field approximation, and 4 monte-carlo sampling methods (Metropolis, Gibbs, Wolff, Swendsen-Wang). Use "help inference" from Matlab to see all options for usage. 2. gbp_preprocess.m and gbp.m These 2 interfaces split Generalized Belief Propagation into the pre-process stage (gbp_preprocess.m) and the inference stage (gbp.m), so the user may use only one of them, or changing some parameters in between. Use "help gbp_preprocess" and "help gbp" from Matlab. 3. simulatedAnnealing.m An interface to the simulated-annealing c-code. This code uses Metropolis sampling method, the same one used for inference. Use "help simulatedAnnealing" from Matlab.

    标签: Matlab-interfaces inference interface the

    上传时间: 2016-08-27

    上传用户:gxrui1991

  • selects the mux channel and configures the MAX197 for second write pulse, written with ACQMOD = 0,

    selects the mux channel and configures the MAX197 for second write pulse, written with ACQMOD = 0, termi- either unipolar or bipolar input range. A write pulse (WR nates acquisition and starts conversion on WR°Os risin + CS) can either start an acquisition interval or initiate a edge (Figure 6). However, if the second control byte combined acquisition plus conversion. The sampling contains ACQMOD = 1, an indefinite acquisition interval interval occurs at the end of the acquisition interval. is restarted. The ACQMOD bit in the input control byte offer

    标签: configures the selects channel

    上传时间: 2013-12-09

    上传用户:

  • selects the mux channel and configures the MAX197 for second write pulse, written with ACQMOD = 0,

    selects the mux channel and configures the MAX197 for second write pulse, written with ACQMOD = 0, termi- either unipolar or bipolar input range. A write pulse (WR nates acquisition and starts conversion on WR°Os risin + CS) can either start an acquisition interval or initiate a edge (Figure 6). However, if the second control byte combined acquisition plus conversion. The sampling contains ACQMOD = 1, an indefinite acquisition interval interval occurs at the end of the acquisition interval. is restarted. The ACQMOD bit in the input control byte offer

    标签: configures the selects channel

    上传时间: 2016-12-24

    上传用户:朗朗乾坤

  • selects the mux channel and configures the MAX197 for second write pulse, written with ACQMOD = 0,

    selects the mux channel and configures the MAX197 for second write pulse, written with ACQMOD = 0, termi- either unipolar or bipolar input range. A write pulse (WR nates acquisition and starts conversion on WR°Os risin is restarted. The ACQMOD bit in the input control byte offer+ CS) can either start an acquisition interval or initiate a edge (Figure 6). However, if the second control byte combined acquisition plus conversion. The sampling contains ACQMOD = 1, an indefinite acquisition interval interval occurs at the end of the acquisition interval.

    标签: configures the selects channel

    上传时间: 2016-12-24

    上传用户:yzhl1988

  • 以L1-minimization为核心的算法

    以L1-minimization为核心的算法,近几年飞速进展,Compressive Sensing (Compressive sampling) 已然成为数学领域和信号处理最前沿最热门的方向。最近一年多这种新形式的算法快速蔓延到模式识别界应用,论文质量高、算法效果好、而且算法一般都非常简单

    标签: minimization 核心 算法

    上传时间: 2013-12-21

    上传用户:我干你啊

  • This experiment uses the Blackfi n BF533/BF537 EZ-KIT to run a simple FIR fi lter on stereo channe

    This experiment uses the Blackfi n BF533/BF537 EZ-KIT to run a simple FIR fi lter on stereo channels at a sampling frequency of 48 kHz. The CYCLE register is embedded in the main program ( process_data.c) to benchmark the time needed to process two FIR fi lters. A background telemetry channel (BTC) is set up to display the cycle count.

    标签: experiment Blackfi EZ-KIT channe

    上传时间: 2013-12-27

    上传用户:baiom

  • This file is a function under matlab which allow to read, play and plot audio signals from wav file.

    This file is a function under matlab which allow to read, play and plot audio signals from wav file. We can also extract the sampling frequency and coding bit number

    标签: file function signals matlab

    上传时间: 2014-01-25

    上传用户:diets