Thermal or finite-size scaling analyses of importance sampling Monte Carlo computer simulations in the vicinity of phase transition points often combine different estimates for the same quantity, such as a critical exponent, with the intent to reduce statistical fluctuations. We point out that the origin of such estimates in the same time series often results in pronounced cross correlations wh...

Successive Difference Replication (SDR) is a method of variance estimation under systematic sampling. The method has been used at the US Census Bureau for important studies including the Current Population Survey and the American Community Survey. The statistical properties of SDR are evaluated in the context of other variance estimators applicable to single-phase systematic sampling. A simulat...

Stratified random sampling at differential rates is commonly used in social science surveys to improve the chances of getting sufficiently large samples of subpopulations of interest. Multi-phase sampling is often used to further target desired populations. The variances of such samples can be estimated using jackknifing, which creates replicated values of the characteristic of interest as if o...

The replica exchange method (REM) has been widely used in the computer simulation of complex systems, such as proteins, glasses, and atomic clusters, where conventional methods based on sampling the canonical ensemble struggle to attain ergodicity over a rugged energy landscape characterized by multiple minima separated by high energy barriers. While the standard temperature REM (tREM) has prov...

A Monte Carlo simulation was conducted to assess the performance, in terms of bit error probability, of a direct sequence spread spectrum multiple access (DS/SSMA) radio system in indoor Rician fading channels using differential phase shift keying (DPSK). Simulation results are presented for a DSjSSMA indoor radio system using selection diversity. Importance sampling techniques were used to acc...

carbon disulfide is used predominantly in the manufacture. it has affects the nervous system. in this study, the applicability of spme as a passive sampler for determination of carbon disulphide in air was studied. effect of sampler and environmental parameters on uptake of carbon disulphide was studied as well. four fibers were tested to select the best sampler for determine carbon disulfide i...

In two-phase sampling, the second-phase sample is often a stratified sample based on the information observed in the first-phase sample. For the total of a population characteristic, either the double-expansion estimator or the reweighted expansion estimator can be used. Given a consistent first-phase replication variance estimator, we propose a consistent variance estimator that is applicable ...

The authors have been developing some novel methods to measure shape, deformation, stress and strain of structures using whole-field optical methods and image processing techniques. In this paper, these methods are introduced, and recent methods on sampling moiré method, whole-space tabulation method (WSTM), and windowed phase-shifting digital holographic interferometry (Windowed PSDHI) are det...