Zaloguj się

Gotowe bibliografie tematyczne / Matched Sampling / Artykuły w czasopismach

Kliknij ten link, aby zobaczyć inne rodzaje publikacji na ten temat: Matched Sampling.

Artykuły w czasopismach na temat „Matched Sampling”

Autor: Grafiati

Data publikacji: 8 września 2023

Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych

Wybierz rodzaj źródła:

Sprawdź 50 najlepszych artykułów w czasopismach naukowych na temat „Matched Sampling”.

Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.

Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.

Przeglądaj artykuły w czasopismach z różnych dziedzin i twórz odpowiednie bibliografie.

1

Wade, Angie. "Matched Sampling for Causal Effects". Journal of the Royal Statistical Society: Series A (Statistics in Society) 171, nr 3 (czerwiec 2008): 760–61. http://dx.doi.org/10.1111/j.1467-985x.2008.00538_9.x.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

2

Lacaze, B. "Matched shapes for uniform sampling". Statistics & Probability Letters 70, nr 2 (listopad 2004): 127–35. http://dx.doi.org/10.1016/j.spl.2004.06.002.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

3

Williamson, John, Tor Tosteson, Susan Redline, Xiangyang Liu i D. Dawson. "Familial Aggregation Studies with Matched Proband Sampling". Human Heredity 46, nr 2 (1996): 76–84. http://dx.doi.org/10.1159/000154330.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

4

Lee, James, H. P. Lee i Lynne Wilkens. "Comparing means based on generalized matched sampling". Psychiatry Research 54, nr 3 (grudzień 1994): 305–6. http://dx.doi.org/10.1016/0165-1781(94)90024-8.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

5

Danziger, Yochay. "Sampling-balanced imaging system utilizing whitening matched filter". Applied Optics 49, nr 17 (7.06.2010): 3330. http://dx.doi.org/10.1364/ao.49.003330.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

6

Clements, S. M., R. K. Cavin III, J. Kang i W. Liu. "Very high speed continuous sampling using matched delays". Electronics Letters 30, nr 6 (17.03.1994): 463–65. http://dx.doi.org/10.1049/el:19940339.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

7

Imbens, Guido W. "Matched Sampling for Causal Effects by Donald B. Rubin". International Statistical Review 75, nr 2 (sierpień 2007): 257–58. http://dx.doi.org/10.1111/j.1751-5823.2007.00015_10.x.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

8

Niraula, Surya Raj, i Frederick A. Connell. "Probability Sampling in Matched Case-Control Study in Drug Abuse". International Journal of Statistics in Medical Research 7, nr 1 (6.02.2018): 18–24. http://dx.doi.org/10.6000/1929-6029.2018.07.01.3.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

9

Sakamoto, Takahide, Guo-Wei Lu i Naokatsu Yamamoto. "Loop-Assisted Coherent Matched Detector for Parallel Time-Frequency Sampling". Journal of Lightwave Technology 35, nr 4 (15.02.2017): 807–14. http://dx.doi.org/10.1109/jlt.2016.2645224.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

10

Keogh, R. H. "Inverse sampling of controls in a matched case–control study". Biostatistics 9, nr 1 (14.06.2007): 152–58. http://dx.doi.org/10.1093/biostatistics/kxm019.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

11

Cheung, Yin Bun, Xiangmei Ma, K. F. Lam, Jialiang Li i Paul Milligan. "Bias control in the analysis of case–control studies with incidence density sampling". International Journal of Epidemiology 48, nr 6 (17.06.2019): 1981–91. http://dx.doi.org/10.1093/ije/dyz116.

Pełny tekst źródła

Streszczenie:

Abstract Background Previous simulation studies of the case–control study design using incidence density sampling, which required individual matching for time, showed biased estimates of association from conditional logistic regression (CLR) analysis; however, the reason for this is unknown. Separately, in the analysis of case–control studies using the exclusive sampling design, it has been shown that unconditional logistic regression (ULR) with adjustment for an individually matched binary factor can give unbiased estimates. The validity of this analytic approach in incidence density sampling needs evaluation. Methods In extensive simulations using incidence density sampling, we evaluated various analytic methods: CLR with and without a bias-reduction method, ULR with adjustment for time in quintiles (and residual time within quintiles) and ULR with adjustment for matched sets and bias reduction. We re-analysed a case–control study of Haemophilus influenzae type B vaccine using these methods. Results We found that the bias in the CLR analysis from previous studies was due to sparse data bias. It can be controlled by the bias-reduction method for CLR or by increasing the number of cases and/or controls. ULR with adjustment for time in quintiles usually gave results highly comparable to CLR, despite breaking the matches. Further adjustment for residual time trends was needed in the case of time-varying effects. ULR with adjustment for matched sets tended to perform poorly despite bias reduction. Conclusions Studies using incidence density sampling may be analysed by either ULR with adjustment for time or CLR, possibly with bias reduction.

Style APA, Harvard, Vancouver, ISO itp.

12

Michalopoulou, Zoi‐Heleni. "A Gibbs sampling approach to matched‐field source localization and deconvolution". Journal of the Acoustical Society of America 108, nr 5 (listopad 2000): 2646. http://dx.doi.org/10.1121/1.4743862.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

13

Borgan, Ornulf, i Espen F. Olsen. "The Efficiency of Simple and Counter-matched Nested Case-control Sampling". Scandinavian Journal of Statistics 26, nr 4 (grudzień 1999): 493–509. http://dx.doi.org/10.1111/1467-9469.00164.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

14

Lui, Kung-Jong. "Notes in Case-Control Studies with Matched Pairs under Inverse Sampling". Biometrical Journal 38, nr 6 (1996): 681–93. http://dx.doi.org/10.1002/bimj.4710380606.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

15

Bopardikar, A. S., R. M. Rao i B. S. Adiga. "Matched sampling systems, relation to wavelets and implementation using PRCC filter banks". IEEE Transactions on Signal Processing 48, nr 8 (2000): 2269–78. http://dx.doi.org/10.1109/78.852008.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

16

Sun, Jing. "The sensitivity of matched sampling methodology in the literature of foreign acquisition". Applied Economics Letters 19, nr 16 (listopad 2012): 1567–70. http://dx.doi.org/10.1080/13504851.2011.639728.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

17

Lu, Lu, i Meiguo Gao. "A Truncated Matched Filter Method for Interrupted Sampling Repeater Jamming Suppression Based on Jamming Reconstruction". Remote Sensing 14, nr 1 (25.12.2021): 97. http://dx.doi.org/10.3390/rs14010097.

Pełny tekst źródła

Streszczenie:

Interrupted sampling repeater jamming (ISRJ) is becoming more widely used in electronic countermeasures (ECM), thanks to the development of digital radio frequency memory (DRFM). Radar electronic counter-countermeasure (ECCM) is much more difficult when the jamming signal is coherent with the emitted signal. Due to the intermittent transmission feature of ISRJ, the energy accumulation of jamming on the matched filter shows a ‘ladder’ characteristic, whereas the real target signal is continuous. As a consequence, the time delay and distribution of the jamming slice can be obtained based on searching the truncated-matched-filter (TMF) matrix. That is composed of pulse compression (PC) results under matched filters with different lengths. Based on the above theory, this paper proposes a truncated matched filter method by the reconstruction of jamming slices to suppress ISRJ of linear frequency modulation (LFM) radars. The numerical simulations indicate the effectiveness of the proposed method and validate the theoretical analysis.

Style APA, Harvard, Vancouver, ISO itp.

18

Mohamed, Linah, Mike Christie i Vasily Demyanov. "Comparison of Stochastic Sampling Algorithms for Uncertainty Quantification". SPE Journal 15, nr 01 (17.11.2009): 31–38. http://dx.doi.org/10.2118/119139-pa.

Pełny tekst źródła

Streszczenie:

Summary History matching and uncertainty quantification are two important research topics in reservoir simulation currently. In the Bayesian approach, we start with prior information about a reservoir (e.g., from analog outcrop data) and update our reservoir models with observations (e.g., from production data or time-lapse seismic). The goal of this activity is often to generate multiple models that match the history and use the models to quantify uncertainties in predictions of reservoir performance. A critical aspect of generating multiple history-matched models is the sampling algorithm used to generate the models. Algorithms that have been studied include gradient methods, genetic algorithms, and the ensemble Kalman filter (EnKF). This paper investigates the efficiency of three stochastic sampling algorithms: Hamiltonian Monte Carlo (HMC) algorithm, Particle Swarm Optimization (PSO) algorithm, and the Neighbourhood Algorithm (NA). HMC is a Markov chain Monte Carlo (MCMC) technique that uses Hamiltonian dynamics to achieve larger jumps than are possible with other MCMC techniques. PSO is a swarm intelligence algorithm that uses similar dynamics to HMC to guide the search but incorporates acceleration and damping parameters to provide rapid convergence to possible multiple minima. NA is a sampling technique that uses the properties of Voronoi cells in high dimensions to achieve multiple history-matched models. The algorithms are compared by generating multiple history- matched reservoir models and comparing the Bayesian credible intervals (p10-p50-p90) produced by each algorithm. We show that all the algorithms are able to find equivalent match qualities for this example but that some algorithms are able to find good fitting models quickly, whereas others are able to find a more diverse set of models in parameter space. The effects of the different sampling of model parameter space are compared in terms of the p10-p50-p90 uncertainty envelopes in forecast oil rate. These results show that algorithms based on Hamiltonian dynamics and swarm intelligence concepts have the potential to be effective tools in uncertainty quantification in the oil industry.

Style APA, Harvard, Vancouver, ISO itp.

19

Likar, Ivana Paljk, Ksenija Slavec Jere, Teja Možina, Ivan Verdenik i Nataša Tul. "Pregnancy loss after amniocentesis and chorionic villus sampling: Cohort study". Slovenian Journal of Public Health 60, nr 1 (31.12.2020): 25–29. http://dx.doi.org/10.2478/sjph-2021-0005.

Pełny tekst źródła

Streszczenie:

Abstract Introduction Introduction: To estimate the procedure-related risks of pregnancy loss following chorionic villus sampling (CVS) and amniocentesis (AC) compared to pregnancies without procedure. Methods This cohort study enrolled all women who underwent CVS or AC at the Department of Perinatology, University Medical Centre, Ljubljana, Slovenia (from January 2013 to June 2015). For each group we obtained a maternal age and gestational age (11–14 weeks for CVS and >15 weeks for AC) for a matched control group without invasive procedures from the national database. The data was obtained from hospital records and telephone surveys concerning pregnancy outcomes. Pregnancy loss rates in intervention vs. control groups were compared by generating relative risk (RR) with a 95% confidence interval. Results During the study period, 828 women underwent CVS and 2,164 women underwent AC. Complete outcome data was available in 2,798 cases (93.5%, 770 CVS, 2,028 AC). Pregnancy loss occurred in 8/770 (1.04%, 95% CI 0.4–2.0%) after CVS vs. 15/1130 (1.33%, 95% CI 0.8–2.2%) in matched control (RR 0.8, 95% CI 0.33–1.8, p=0.6). It occurred in 16/2028 (0.79%, 95% CI 0.5–1.3%) after AC vs. 14/395 (3.29%, 95% CI 2.1–5.8%) in matched control (RR 0.2, 95% CI 0.11–0.45, p<0.0001). Conclusion The pregnancy loss rates after CVS and AC were comparable to losses in pregnancies without these procedures. With the increasing use of non-invasive prenatal testing, information that the invasive procedures are safe when indicated is essential.

Style APA, Harvard, Vancouver, ISO itp.

20

Deltas, George, i Eleftherios Zacharias. "Sampling Frequency and the Comparison Between Matched-Model and Hedonic Regression Price Indexes". Journal of Business & Economic Statistics 22, nr 1 (styczeń 2004): 94–106. http://dx.doi.org/10.1198/073500103288619421.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

21

Zhou, Qian, Weilin Xie, Zongyang Xia, Hongxiao Shi, Yi Dong i Weisheng Hu. "Compensation of phase error in optical frequency-domain reflectometry using delay-matched sampling". Optical Engineering 53, nr 7 (11.07.2014): 074103. http://dx.doi.org/10.1117/1.oe.53.7.074103.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

22

Suhara, T., H. Ishizuki, M. Fujimura i H. Nishihara. "Waveguide quasi-phase-matched sum-frequency generation device for high-efficiency optical sampling". IEEE Photonics Technology Letters 11, nr 8 (sierpień 1999): 1027–29. http://dx.doi.org/10.1109/68.775335.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

23

Jin-Ku Kang, Wentai Liu i R. K. Cavin. "A CMOS high-speed data recovery circuit using the matched delay sampling technique". IEEE Journal of Solid-State Circuits 32, nr 10 (1997): 1588–96. http://dx.doi.org/10.1109/4.634670.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

24

Lui, Kung-Jong. "Notes on Interval Estimation of Odds Ratio in Matched Pairs under Stratified Sampling". Communications in Statistics - Simulation and Computation 45, nr 7 (21.08.2014): 2562–76. http://dx.doi.org/10.1080/03610918.2014.909934.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

25

Lui, Kung-Jong. "Estimation of rate ratio and relative difference in matched-pairs under inverse sampling". Environmetrics 12, nr 6 (2001): 539–46. http://dx.doi.org/10.1002/env.479.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

26

Ecker, Frank, Jennifer Francis, Per Olsson i Katherine Schipper. "Non-random sampling and association tests on realized returns and risk proxies". Review of Accounting Studies 26, nr 2 (9.03.2021): 772–814. http://dx.doi.org/10.1007/s11142-021-09581-0.

Pełny tekst źródła

Streszczenie:

AbstractThis paper investigates how data requirements often encountered in archival accounting research can produce a data-restricted sample that is a non-random selection of observations from the reference sample to which the researcher wishes to generalize results. We illustrate the effects of non-random sampling on results of association tests in a setting with data on one variable of interest for all observations and frequently-missing data on another variable of interest. We develop and validate a resampling approach that uses only observations from the data-restricted sample to construct distribution-matched samples that approximate randomly-drawn samples from the reference sample. Our simulation tests provide evidence that distribution-matched samples yield generalizable results. We demonstrate the effects of non-random sampling in tests of the association between realized returns and five implied cost of equity metrics. In this setting, the reference sample has full information on realized returns, while on average only 16% of reference sample observations have data on cost of equity metrics. Consistent with prior research (e.g., Easton and Monahan The Accounting Review 80, 501–538, 2005), analysis using the unadjusted (non-random) cost of equity sample reveals weak or negative associations between realized returns and cost of equity metrics. In contrast, using distribution-matched samples, we find reliable evidence of the theoretically-predicted positive association. We also conceptually and empirically compare distribution-matching with multiple imputation and selection models, two other approaches to dealing with non-random samples.

Style APA, Harvard, Vancouver, ISO itp.

27

Dollaghan, Christine A., Thomas F. Campbell i Russell Tomlin. "Video Narration as a Language Sampling Context". Journal of Speech and Hearing Disorders 55, nr 3 (sierpień 1990): 582–90. http://dx.doi.org/10.1044/jshd.5503.582.

Pełny tekst źródła

Streszczenie:

Video narration is a context for samping spontaneous expressive language in which the subject produces an on-line description of the events he or she observes on videotape. Video narration offers a means of reducing the variability among language samples from different speakers, or from the same speaker over time, because the number and complexity of events to be coded linguistically is known and constant. This increased consistency facilitates comparisons among samples, as well as enabling certain analyses requiring a transparent relationship between utterances and events. Advantages and limitations of video narration as an adjunct to conversational sampling are described, and comparisons between longitudinal video narration and conversational samples obtained from brain-injured children and their matched normal controls are presented.

Style APA, Harvard, Vancouver, ISO itp.

28

Zhang, Li-Chun. "Generalised Regression Estimation Given Imperfectly Matched Auxiliary Data". Journal of Official Statistics 37, nr 1 (1.03.2021): 239–55. http://dx.doi.org/10.2478/jos-2021-0010.

Pełny tekst źródła

Streszczenie:

Abstract Generalised regression estimation allows one to make use of available auxiliary information in survey sampling. We develop three types of generalised regression estimator when the auxiliary data cannot be matched perfectly to the sample units, so that the standard estimator is inapplicable. The inference remains design-based. Consistency of the proposed estimators is either given by construction or else can be tested given the observed sample and links. Mean square errors can be estimated. A simulation study is used to explore the potentials of the proposed estimators.

Style APA, Harvard, Vancouver, ISO itp.

29

Rosenbaum, Paul R., i Donald B. Rubin. "Constructing a Control Group Using Multivariate Matched Sampling Methods That Incorporate the Propensity Score". American Statistician 39, nr 1 (luty 1985): 33. http://dx.doi.org/10.2307/2683903.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

30

Rosenbaum, Paul R., i Donald B. Rubin. "Constructing a Control Group Using Multivariate Matched Sampling Methods That Incorporate the Propensity Score". American Statistician 39, nr 1 (luty 1985): 33–38. http://dx.doi.org/10.1080/00031305.1985.10479383.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

31

Ishizuki, Hideki, Masatoshi Fujimura, Toshiaki Suhara i Hiroshi Nishihara. "LiNbO3 waveguide quasi‐phase‐matched sum‐frequency generation device for high‐efficiency optical sampling". Electronics and Communications in Japan (Part II: Electronics) 84, nr 5 (maj 2001): 29–36. http://dx.doi.org/10.1002/ecjb.1026.abs.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

32

García luengo, A. V. "Ratio-cum-product estimation in presence of non-response in successive sampling". Journal of Applied Mathematics, Statistics and Informatics 12, nr 1 (1.05.2016): 55–83. http://dx.doi.org/10.1515/jamsi-2016-0005.

Pełny tekst źródła

Streszczenie:

Abstract The problem of estimating the finite population mean on the samples selected over two occasions has been considered, when there is non-response (i) on both the occasions, (ii) only on the second occasion for both matched and unmatched portions of the sample, and (iii) only on the second occasion for unmatched portion of the sample. For the case when two auxiliary variables are positively and negatively correlated with the study variable, a double sampling ratio-cum-product estimate from the matched portion of the sample is presented. Expressions for optimum matching fraction and of the combined estimate have been derived. The gain in efficiency, the sample sizes and the cost function of the combined estimators over the direct estimate using no information gathered on the first occasion is computed. The comparison between the proposed strategy with other estimators is also carried out. An empirical study is also included for illustration.

Style APA, Harvard, Vancouver, ISO itp.

33

Cheung, Yin Bun, Xiangmei Ma, K. F. Lam, Jialiang Li, Chee Fu Yung, Paul Milligan i Grant Mackenzie. "Statistical inference in matched case–control studies of recurrent events". International Journal of Epidemiology 49, nr 3 (3.03.2020): 996–1006. http://dx.doi.org/10.1093/ije/dyaa012.

Pełny tekst źródła

Streszczenie:

Abstract Background The concurrent sampling design was developed for case–control studies of recurrent events. It involves matching for time. Standard conditional logistic-regression (CLR) analysis ignores the dependence among recurrent events. Existing methods for clustered observations for CLR do not fit the complex data structure arising from the concurrent sampling design. Methods We propose to break the matches, apply unconditional logistic regression with adjustment for time in quintiles and residual time within each quintile, and use a robust standard error for observations clustered within persons. We conducted extensive simulation to evaluate this approach and compared it with methods based on CLR. We analysed data from a study of childhood pneumonia to illustrate the methods. Results The proposed method and CLR methods gave very similar point estimates of association and showed little bias. The proposed method produced confidence intervals that achieved the target level of coverage probability, whereas the CLR methods did not, except when disease incidence was low. Conclusions The proposed method is suitable for the analysis of case–control studies with recurrent events.

Style APA, Harvard, Vancouver, ISO itp.

34

Veenhof, Herman, Remco A. Koster, Lenneke A. T. Junier, Stefan P. Berger, Stephan J. L. Bakker i Daan J. Touw. "Volumetric absorptive microsampling and dried blood spot microsampling vs. conventional venous sampling for tacrolimus trough concentration monitoring". Clinical Chemistry and Laboratory Medicine (CCLM) 58, nr 10 (25.09.2020): 1687–95. http://dx.doi.org/10.1515/cclm-2019-1260.

Pełny tekst źródła

Streszczenie:

AbstractObjectivesMonitoring tacrolimus blood concentrations is important for preventing allograft rejection in transplant patients. Our hospital offers dried blood spot (DBS) sampling, giving patients the opportunity to sample a drop of blood from a fingerprick at home, which can be sent to the laboratory by mail. In this study, both a volumetric absorptive microsampling (VAMS) device and DBS sampling were compared to venous whole blood (WB) sampling.MethodsA total of 130 matched fingerprick VAMS, fingerprick DBS and venous WB samples were obtained from 107 different kidney transplant patients by trained phlebotomists for method comparison using Passing-Bablok regression. Bias was assessed using Bland-Altman. A multidisciplinary team pre-defined an acceptance limit requiring >80% of all matched samples within 15% of the mean of both samples. Sampling quality was evaluated for both VAMS and DBS samples.Results32.3% of the VAMS samples and 6.2% of the DBS samples were of insufficient quality, leading to 88 matched samples fit for analysis. Passing-Bablok regression showed a significant difference between VAMS and WB, with a slope of 0.88 (95% CI 0.81–0.97) but not for DBS (slope 1.00; 95% CI 0.95–1.04). Both VAMS (after correction for the slope) and DBS showed no significant bias in Bland-Altman analysis. For VAMS and DBS, the acceptance limit was met for 83.0% and 96.6% of the samples, respectively.ConclusionsVAMS sampling can replace WB sampling for tacrolimus trough concentration monitoring, but VAMS sampling is currently inferior to DBS sampling, both regarding sample quality and agreement with WB tacrolimus concentrations.

Style APA, Harvard, Vancouver, ISO itp.

35

Arratia, Richard, i Stephen DeSalvo. "On the Random Sampling of Pairs, with Pedestrian Examples". Advances in Applied Probability 47, nr 1 (marzec 2015): 292–305. http://dx.doi.org/10.1239/aap/1427814592.

Pełny tekst źródła

Streszczenie:

For a collection of objects such as socks, which can be matched according to a characteristic such as color, we study the innocent phrase ‘the distribution of the color of a matching pair’ by looking at two methods for selecting socks. One method is memoryless and effectively samples socks with replacement, while the other samples socks sequentially, with memory, until the same color has been seen twice. We prove that these two methods yield the same distribution on colors if and only if the initial distribution of colors is a uniform distribution. We conjecture a nontrivial maximum value for the total variation distance of these distributions in all other cases.

Style APA, Harvard, Vancouver, ISO itp.

36

Arratia, Richard, i Stephen DeSalvo. "On the Random Sampling of Pairs, with Pedestrian Examples". Advances in Applied Probability 47, nr 01 (marzec 2015): 292–305. http://dx.doi.org/10.1017/s0001867800007813.

Pełny tekst źródła

Streszczenie:

For a collection of objects such as socks, which can be matched according to a characteristic such as color, we study the innocent phrase ‘the distribution of the color of a matching pair’ by looking at two methods for selecting socks. One method is memoryless and effectively samples socks with replacement, while the other samples socks sequentially, with memory, until the same color has been seen twice. We prove that these two methods yield the same distribution on colors if and only if the initial distribution of colors is a uniform distribution. We conjecture a nontrivial maximum value for the total variation distance of these distributions in all other cases.

Style APA, Harvard, Vancouver, ISO itp.

37

Koolman, Leonard, Reenesh Prakash, Yohane Diness, Chisomo Msefula, Tonney S. Nyirenda, Franziska Olgemoeller, Paul Wigley i in. "Case-control investigation of invasive Salmonella disease in Malawi reveals no evidence of environmental or animal transmission of invasive strains, and supports human to human transmission". PLOS Neglected Tropical Diseases 16, nr 12 (12.12.2022): e0010982. http://dx.doi.org/10.1371/journal.pntd.0010982.

Pełny tekst źródła

Streszczenie:

Background Invasive Salmonella infections cause significant morbidity and mortality in Sub-Saharan Africa. However, the routes of transmission are uncertain. We conducted a case-control study of index-case and geographically-matched control households in Blantyre, Malawi, sampling Salmonella isolates from index cases, healthy people, animals, and the household environment. Methodology Sixty index cases of human invasive Salmonella infection were recruited (March 2015-Oct 2016). Twenty-eight invasive Non-Typhoidal Salmonella (iNTS) disease and 32 typhoid patients consented to household sampling. Each index-case household was geographically matched to a control household. Extensive microbiological sampling included stool sampling from healthy household members, stool or rectal swabs from household-associated animals and boot-sock sampling of the household environment. Findings 1203 samples from 120 households, yielded 43 non-Typhoidal Salmonella (NTS) isolates from 25 households (overall sample positivity 3.6%). In the 28 iNTS patients, disease was caused by 3 STs of Salmonella Typhimurium, mainly ST313. In contrast, the isolates from households spanned 15 sequence types (STs). Two S. Typhimurium isolates from index cases closely matched isolates from their respective asymptomatic household members (2 and 3 SNP differences respectively). Despite the recovery of a diverse range of NTS, there was no overlap between the STs causing iNTS disease with any environmental or animal isolates. Conclusions The finding of NTS strains from index cases that matched household members, coupled with lack of related animal or environmental isolates, supports a hypothesis of human to human transmission of iNTS infections in the household. The breadth of NTS strains found in animals and the household environment demonstrated the robustness of NTS sampling and culture methodology, and suggests a diverse ecology of Salmonella in this setting. Healthy typhoid (S. Typhi) carrier state was not detected. The lack of S. Typhi isolates from the household environment suggests that further methodological development is needed to culture S. Typhi from the environment.

Style APA, Harvard, Vancouver, ISO itp.

38

Delcoigne, Bénédicte, Niels Hagenbuch, Maria EC Schelin, Agus Salim, Linda S. Lindström, Jonas Bergh, Kamila Czene i Marie Reilly. "Feasibility of reusing time-matched controls in an overlapping cohort". Statistical Methods in Medical Research 27, nr 6 (21.09.2016): 1818–29. http://dx.doi.org/10.1177/0962280216669744.

Pełny tekst źródła

Streszczenie:

The methods developed for secondary analysis of nested case-control data have been illustrated only in simplified settings in a common cohort and have not found their way into biostatistical practice. This paper demonstrates the feasibility of reusing prior nested case-control data in a realistic setting where a new outcome is available in an overlapping cohort where no new controls were gathered and where all data have been anonymised. Using basic information about the background cohort and sampling criteria, the new cases and prior data are “aligned” to identify the common underlying study base. With this study base, a Kaplan–Meier table of the prior outcome extracts the risk sets required to calculate the weights to assign to the controls to remove the sampling bias. A weighted Cox regression, implemented in standard statistical software, provides unbiased hazard ratios. Using the method to compare cases of contralateral breast cancer to available controls from a prior study of metastases, we identified a multifocal tumor as a risk factor that has not been reported previously. We examine the sensitivity of the method to an imperfect weighting scheme and discuss its merits and pitfalls to provide guidance for its use in medical research studies.

Style APA, Harvard, Vancouver, ISO itp.

39

Fujii, Yoshinori, i Zhong-Zhan Zhang. "MANTEL-HAENSZEL TYPE ESTIMATORS FOR THE COUNTER-MATCHED SAMPLING DESIGN IN NESTED CASE-CONTROL STUDY". Bulletin of informatics and cybernetics 33, nr 1/2 (grudzień 2001): 43–52. http://dx.doi.org/10.5109/13502.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

40

Samawi, Hani M., Mohammad F. Al-Saleh i Obaid Al-Saidy. "The matched pair sign test using bivariate ranked set sampling for different ranking based schemes". Statistical Methodology 6, nr 4 (lipiec 2009): 397–407. http://dx.doi.org/10.1016/j.stamet.2009.02.002.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

41

Kitaeva, G. Kh, S. P. Kovalev, I. I. Naumova, R. A. Akhmedzhanov, I. E. Ilyakov, B. V. Shishkin i E. V. Suvorov. "Quasi-phase-matched probe-energy electro-optic sampling as a method of narrowband terahertz detection". Applied Physics Letters 96, nr 7 (15.02.2010): 071106. http://dx.doi.org/10.1063/1.3309688.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

42

Herrmann, R. B., i D. R. Russell. "Ground roll: Rejection using adaptive phase‐matched filters". GEOPHYSICS 55, nr 6 (czerwiec 1990): 776–81. http://dx.doi.org/10.1190/1.1442890.

Pełny tekst źródła

Streszczenie:

The technique of phase‐matched filtering dispersive surface waves is extended to permit an adaptive, iterative process by which the signal itself in a seismic trace designs a filter to remove the surface wave. The technique is robust and well‐behaved and requires the specification of only simple parameters for its operation. The technique is applied to data sets from three regions, representing a wide range in the ratio of surface‐wave noise to exploration signal. The technique works very well with poor data sets and also improves good data sets. Since the technique is applied to individual traces, it works in situations for which f‐k filtering might not be feasible due to poor spatial sampling. The technique is computationally more intensive than recursive digital band‐pass filtering of individual traces, but is less intensive than filtering in the f‐k domain.

Style APA, Harvard, Vancouver, ISO itp.

43

Aljannah, Nur Fajrin, i Francisca Romana Sri Supadmi. "Incompatible Results on Matched Cross Test Examination". Jaringan Laboratorium Medis 3, nr 2 (21.11.2021): 77–82. http://dx.doi.org/10.31983/jlm.v3i2.8027.

Pełny tekst źródła

Streszczenie:

Compatibility testing before blood transfusion is very crucial. This procedure to prevent transfusion reactions due to blood group incompatibility or irregular antibodies. Cross-matching to ensure that the blood safe for the recipient. There are two results in the cross-matching, namely compatible and incompatible. This study aims to determine the inappropriate results of cross-matching at Blood Transfusion Service of the Indonesian Red Cross, Kulon Progo Regency. This study used a quantitative descriptive research design with a retrospective approach. The samples used in this study were 78 incompatible samples in Blood Transfusion Service of the Indonesian Red Cross, Kulon Progo Regency. The sampling technique used was the total population. Methods of data analysis using descriptive analysis. The results show incompatibilities of most compatible cross tests found in minor and auto control (96.1%) with male gender frequency (35.9%) and women (64.1%). The most blood type that has incompatibilities is blood type O (43.3%). The most Diagnosis is anemia (76.9%), and the most components are PRC (88.4%). The most incompatible types are minor and auto control and the most commonly encountered in women, O blood type, anemia, and components of PRC.

Style APA, Harvard, Vancouver, ISO itp.

44

Xie, Yuan Mang, Zhao Hua Pan, De Gan Zhang i Hong Tao Peng. "A New Kind of Texture Synthesis Method Based on Best Match". Applied Mechanics and Materials 575 (czerwiec 2014): 585–88. http://dx.doi.org/10.4028/www.scientific.net/amm.575.585.

Pełny tekst źródła

Streszczenie:

In order to improve above problems, this paper presents a new patch-based sampling algorithm for synthesizing textures from an input sample texture. We determine the size of block analyzing the effect of the best matched texture to synthesis result, and the result is satisfying. Moreover, the patch-based sampling algorithm remains effective when pixel-based non-parametric sampling algorithms fail to produce good results.

Style APA, Harvard, Vancouver, ISO itp.

45

Hu, Chunyuan, Yujie Lin, Jianguo Li, Xiangyuan Bu i Jianping An. "Near-Nyquist-Limit Optical Communication and Ranging Method Based on Waveform Matched PPM". Electronics 11, nr 4 (13.02.2022): 565. http://dx.doi.org/10.3390/electronics11040565.

Pełny tekst źródła

Streszczenie:

Deep-space optical communication and ranging technologies have attracted much attention for satellite-to-earth and moon-to-earth exploration. In integrated communication and ranging scenarios, non-integer oversampling factors are employed to improve the ranging performance, which can cause accumulated timing errors. We propose a novel pulse position modulation (PPM) symbol decision method based on waveform matching to reduce the impact of accumulated timing errors near the Nyquist sampling limit. Simulation results demonstrate that the ranging accuracy can reach 2.6 and 0.52 mm at sampling rates of 625 Msps and 2.5 Gsps, respectively. The proposed symbol decision method has a gain of over 1.1 dB compared with the traditional method at the bit error rate (BER) of less than 10−6. The experimental results verify that this method can achieve high-precision measurements of distance and reliable transmission of information.

Style APA, Harvard, Vancouver, ISO itp.

46

Rosenbaum, Paul R., Richard N. Ross i Jeffrey H. Silber. "Minimum Distance Matched Sampling With Fine Balance in an Observational Study of Treatment for Ovarian Cancer". Journal of the American Statistical Association 102, nr 477 (marzec 2007): 75–83. http://dx.doi.org/10.1198/016214506000001059.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

47

Güralp, Onur, Nevin Tüten, Koray Gök, Kübra Hamzaoglu, Huri Bulut, Meike Schild-Suhren, Eduard Malik i Abdullah Tüten. "Serum kallistatin level is decreased in women with preeclampsia". Journal of Perinatal Medicine 49, nr 1 (26.01.2021): 60–66. http://dx.doi.org/10.1515/jpm-2020-0142.

Pełny tekst źródła

Streszczenie:

AbstractObjectivesTo evaluate the serum levels of the serine proteinase inhibitor kallistatin in women with preeclampsia (PE).MethodsThe clinical and laboratory parameters of 55 consecutive women with early-onset PE (EOPE) and 55 consecutive women with late-onset PE (LOPE) were compared with 110 consecutive gestational age (GA)-matched (±1 week) pregnant women with an uncomplicated pregnancy and an appropriate for gestational age fetus.ResultsMean serum kallistatin was significantly lower in women with PE compared to the GA-matched-controls (27.74±8.29 ng/mL vs. 37.86±20.64 ng/mL, p<0.001); in women with EOPE compared to that of women in the control group GA-matched for EOPE (24.85±6.65 ng/mL vs. 33.37±17.46 ng/mL, p=0.002); and in women with LOPE compared to that of women in the control group GA-matched for LOPE (30.87±8.81 ng/mL vs. 42.25±22.67 ng/mL, p=0.002). Mean serum kallistatin was significantly lower in women with EOPE compared to LOPE (24.85±6.65 ng/mL vs. 30.87±8.81 ng/mL, p<0.001). Serum kallistatin had negative correlations with systolic and diastolic blood pressure, creatinine, and positive correlation with GA at sampling and GA at birth.ConclusionsSerum kallistatin levels are decreased in preeclamptic pregnancies compared to the GA-matched-controls. This decrease was also significant in women with EOPE compared to LOPE. Serum kallistatin had negative correlation with systolic and diastolic blood pressure, creatinine and positive correlation with GA at sampling and GA at birth.

Style APA, Harvard, Vancouver, ISO itp.

48

DOSSO, STAN E. "BENCHMARKING RANGE-DEPENDENT PROPAGATION MODELING IN MATCHED-FIELD INVERSION". Journal of Computational Acoustics 10, nr 02 (czerwiec 2002): 231–42. http://dx.doi.org/10.1142/s0218396x02001589.

Pełny tekst źródła

Streszczenie:

This paper considers how the accuracy of range-dependent propagation modeling affects the results of matched-field inversion (MFI) for seabed geoacoustic parameters. In MFI, the forward problem of computing the acoustic fields associated with candidate geoacoustic models is solved a large number of times. Given significant mismatch due to measurement and theory errors, together with the computationally intensive nature of MFI, the appropriate tradeoff between modeling accuracy and computational speed is not obvious. This tradeoff is considered here in terms of the degradation in information content for the geoacoustic parameters that results from inaccurate propagation modeling. The information content is quantified using the marginal posterior probability distributions of the geoacoustic parameters, as computed from a fast Gibbs sampling approach to Bayesian inversion. A synthetic example of this analysis is presented in which the parabolic equation is used to model acoustic fields for a shallow-water, upslope environment, with different levels of modeling accuracy/speed controlled by the range and depth step sizes of the computational grid.

Style APA, Harvard, Vancouver, ISO itp.

49

Ampah, Geraldine Asiwome. "Matched Sampling Methodology Reconsidered: The Role of Trust in Studying Remittance Transfers Between Ghanaian Immigrants in the UK and their Relatives in Ghana". African Affairs 121, nr 482 (1.01.2022): 131–50. http://dx.doi.org/10.1093/afraf/adac007.

Pełny tekst źródła

Streszczenie:

Abstract Matched sampling methodology (MSM) has been used in remittance studies to understand remittance transfers. However, a detailed examination of the role of trust as a central element in producing reliable and valid research conclusions when a matched sample methodology is used has been missing in the literature. This paper fills this lacuna by arguing that cultivating trust in matched sampling research on remittance transfers, a sensitive subject matter, between African immigrants and their relatives presents a more nuanced narrative of remittance transfers. This approach shows that not only do African immigrants in the ‘Global North’ send remittances back home, but immigrants also receive remittances (reverse remittances) from their relatives on the continent. Using remittance research conducted among Ghanaian immigrants in the UK and their relatives in Ghana, this article identifies three ‘avenues of trust’—‘public avenues of trust’, ‘intermediate avenues of trust’, and ‘private avenues of trust’—to highlight the processes and challenges that researchers encounter while establishing contact with research participants and the role that trust plays in gathering accurate information. Focusing on the role of trust in MSM is in line with recent theoretical paradigms of remittance research that call for soliciting information from both origin and destination countries.

Style APA, Harvard, Vancouver, ISO itp.

50

Jin, Yongsik, W. Kwon i S. M. Lee. "Affine matched parameterization approach to sampled-data stabilization criteria for T-S fuzzy systems with variable sampling". Journal of the Franklin Institute 358, nr 7 (maj 2021): 3530–53. http://dx.doi.org/10.1016/j.jfranklin.2021.02.023.

Pełny tekst źródła

Style APA, Harvard, Vancouver, ISO itp.

Oferujemy zniżki na wszystkie plany premium dla autorów, których prace zostały uwzględnione w tematycznych zestawieniach literatury. Skontaktuj się z nami, aby uzyskać unikalny kod promocyjny!