نتایج جستجو برای: sampling design

تعداد نتایج: 1142555  

2015
Daniel A. Griffith G.B.M. Heuvelink D. A. Griffith T. Hengl

Journal: :CoRR 2011
Xiaohui Bei Ning Chen Nick Gravin Pinyan Lu

Budget feasible mechanism considers algorithmic mechanism design questions where there is a budget constraint on the total payment of the mechanism. An important question in the field is that under which valuation domains there exist budget feasible mechanisms that admit ‘small’ approximations (compared to a socially optimal solution). Singer [20] showed that additive and submodular functions a...

Journal: :IEEE Trans. Signal Processing 2003
Raman Venkataramani Yoram Bresler

We address the problem of FIR equalizer filter design for multiple-input multiple-output (MIMO) linear time-invariant channels with uniform sampling at the channel outputs. This scheme encompasses Papoulis’ generalized sampling and several nonuniform sampling schemes as special cases. The input signals are modeled as either continuous-time or discrete-time multi-band input signals, with differe...

2002
Brian K. Beachkofski Gary B. Lamont

Recently there have been advances in strati ed sampling techniques that attempt to enforce equal distributions not only across the design variables, but also onto the design space itself. This requires a numerically intensive optimization routine. Until now, no optimization strategy was able to distribute sample points evenly in the design space, but Evolutionary Algorithms (EA) act as an enabl...

Journal: :Computational Statistics & Data Analysis 2007
Johan Pea Lionel Qualité Yves Tillé

In order to select a sample in a finite population of N units with given inclusion probabilities, it is possible to define a sampling design on at most N samples that have a positive probability of being selected. Designs defined on minimal sets of samples are called minimum support designs. It is shown that, for any vector of inclusion probabilities, systematic sampling always provides a minim...

1997
Uwe Meyer-Bäse Jonathon D. Mellott Fred J. Taylor

Uwe Meyer-B ase, Jon Mellott, and Fred Taylor University of Florida, High Speed Digital Architecture Laboratory 405 SE BLDG 42,Gainesville, FL 32611-6130 USA fuwe,jon,[email protected] .edu ABSTRACT Frequency sampling lters (FSF) are of interest to the designers of multirate lter banks due to their intrinsic loworder, complexity, and linear phase behavior. Fast FSFs residing in smaller packages ...

Aram Tirgar Farhang Akbar Kanzadeh Farideh Golbabaei Javad Hamedi Keramat Nourijelyani Mohammad Reza Ganjali Sayed Jamaleddin Shahtaheri,

A chromium electroplating bath with the ability to produce homogenous mist was used to evaluate parameters influencing hexavalent chromium (Cr+6) mist sampling methods. The results of 48 Cr+6mist samples collected using the U.S. National Institute for Occupational Safety and Health method 7600...

2000
Philip J. Smith Michael P. Battaglia Barry I. Graubard David C. Hoaglin Martin Frankel Meena Khare

The analysis of survey data requires the application of special statistical methods to adjust for the effects of a complex sampling design that has been implemented to satisfy analytic objectives, contain survey costs, and ease the administrative burden of carrying out the survey. The complex sampling design may entail stratification, clustering, unequal probability sampling, and the use of aux...

2005
Mohammad SALEHI David R. SMITH

Designing an efficient sampling scheme for a rare and clustered population is a challenging area of research. Adaptive cluster sampling, which has been shown to be viable for such a population, is based on sampling a neighborhood of units around a unit that meets a specified condition. However, the edge units produced by sampling neighborhoods have proven to limit the efficiency and applicabili...

S. Hasheminasab, S. Shojaee,

Although Genetic algorithm (GA), Ant colony (AC) and Particle swarm optimization algorithm (PSO) have already been extended to various types of engineering problems, the effects of initial sampling beside constraints in the efficiency of algorithms, is still an interesting field. In this paper we show that, initial sampling with a special series of constraints play an important role in the conv...

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