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Improving the Quality of Random Number Generators by Applying a Simple Ratio Transformation [article]

Michael Kolonko, Zijun Wu, Feng Gu
2016 arXiv   pre-print
It is well-known that the quality of random number generators can often be improved by combining several generators, e.g. by summing or subtracting their results.  ...  Thus the additional effort to produce a second random number and to calculate the ratio allows to increase the quality of available random number generators.  ...  The basis of these simulation tools is a (pseudo-) random input provided by a random number generator.  ... 
arXiv:1612.07318v1 fatcat:muthkhio6beovng4mvuy475gti

Steganographic Data Hiding using Modified APSO

E Divya, P Raj Kumar
2016 International Journal of Intelligent Systems and Applications  
The particle swarm optimisation algorith m is applied to the spatial domain technique.  ...  This paper also analyses the modified part icle swarm optimisation on the spatial domain technique which improved the PSNR and also reduced the computation time.  ...  Transform do main techniques apply the Discrete Cosine transform (DCT) or the Discrete Wavelet Transform (DWT) or the Discrete Fourier Transform (DFT) to the cover image and embed the message by modulating  ... 
doi:10.5815/ijisa.2016.07.04 fatcat:tkzyriflwvbyhnzmunajxgpav4

Evaluating the downstream Effects of the Twostep Transformation toward Normality: Implications for MIS Research

Gary F. Templeton, Marcia Weidenmier Watson
2010 International Conference on Information Systems  
This paper empirically evaluates the usefulness of the Two-Step approach for transforming continuous variables toward normality.  ...  The results of several statistical procedures relevant to formative index (construct) construction are used to compare the three variable forms.  ...  First, the Two- Step can improve the sample quality as shown by the Kaiser-Meyer-Olkin test results.  ... 
dblp:conf/icis/TempletonW10 fatcat:jnt2ddszhrbgxnul2664jqwlzu

Using Dummy Variables in Improving the Simple Linear Regression Model for the Ratio of Consumption to the National Income in Iraq during the Period (1970-1994)

Fedaa N. Abdulahad
2012 Al-Nahrain Journal of Science  
This comparison aims to show which one of the two methods is better in improving the linear regression model by applying them on the data of ratio of consumption to the national income in Iraq for the  ...  This paper discuss the concept of dummy variables and its importance usge in statistical analysis by transforming the qualitative variables to measurable quantitative variables and applying it in analyzing  ...  Using the power transformation in improving the model did not help a lot in explaining a larger ratio of the results. 4.  ... 
doi:10.22401/jnus.15.3.23 fatcat:hdvb2p55qzc63gcpvcnxl7vrv4

Design of Hybrid Filter with Wavelet denoising and Anisotropic Diffusion Filter for Image Despeckling

Simranjit Kour, Bikrampal Kaur
2015 International Journal of Computer Applications  
A lot of filters were created which basically worked on enhancing the quality parameters of the image, like Coefficient Of Correlation, Peak signal-to-noise ratio and Equivalent Number of Looks.  ...  The objective of this paper is to work on the drawbacks of earlier models, and propose a modern approach to de-speckling an image by creating a hybrid filter which uses two different filtering techniques  ...  Pixel values of an image represent the gray levels, colors, heights etc. Once an image is digitized, various operations can be applied on it for improving its quality.  ... 
doi:10.5120/20256-2635 fatcat:d7b6vn7ugbdmvjhtvgau3yc5au

An Evaluation on Irretrievable Compression of Encrypted Image

K. Porkumaran, S. Manimurugan, Pradeep P Mathew
2012 International Journal of Computer Applications  
But they practiced a variety of limitations. The major obscurity is to attain a higher compression ratio as well as the better quality of the reconstructed image.  ...  The higher compression ratio and the smoother the original image may supply the better quality of the reconstructed image.  ...  The authors would like to thank the reviewers for their valuable comments.  ... 
doi:10.5120/5664-7697 fatcat:gyyy4wlolfhslmc2wtcyxmnipe

Transformations for the compression of FASTQ quality scores of next-generation sequencing data

Raymond Wan, Vo Ngoc Anh, Kiyoshi Asai
2011 Computer applications in the biosciences : CABIOS  
Motivation: The growth of next-generation sequencing means that more effective and efficient archiving methods are needed to store the generated data for public dissemination and in anticipation of more  ...  This article examines methods for compressing the quality score component of the data to partly address this problem.  ...  ACKNOWLEDGEMENTS The authors are grateful to members of the Computational Biology Research Center (AIST) for fruitful discussions and to the reviewers for helpful comments.  ... 
doi:10.1093/bioinformatics/btr689 pmid:22171329 fatcat:7k2vg35kijb7baeea7234j4vim

Calibrating E-values for MS2 database search methods

Gelio Alves, Aleksey Y Ogurtsov, Wells W Wu, Guanghui Wang, Rong-Fong Shen, Yi-Kuo Yu
2007 Biology Direct  
We demonstrate that our calibration protocol indeed produces unified statistics both in terms of average number of false positives and in terms of the probability for a peptide hit to be a true positive  ...  We also address the importance of using spectrum-specific statistics and possible improvement on the current calibration protocol.  ...  This work was supported by the Intramural Research Program of the National Library of Medicine at National Institutes of Health/DHHS.  ... 
doi:10.1186/1745-6150-2-26 pmid:17983478 pmcid:PMC2206012 fatcat:fmwuyqjpn5esbi3eevdpoqxbny

Effective image compression using evolved wavelets

Uli Grasemann, Risto Miikkulainen
2005 Proceedings of the 2005 conference on Genetic and evolutionary computation - GECCO '05  
Using evolution to adapt wavelets to classes of images can therefore significantly increase the quality of compressed images.  ...  Unlike traditional image coders, however, their performance depends to a large degree on the choice of a good wavelet.  ...  be generated by applying lifting steps.  ... 
doi:10.1145/1068009.1068338 dblp:conf/gecco/GrasemannM05 fatcat:7r5jgmk4dferjlm6n5tdpciurq

A dual element based geometric element transformation method for all-hexahedral mesh smoothing

Dimitris Vartziotis, Joachim Wipper
2011 Computer Methods in Applied Mechanics and Engineering  
Based on a simple geometric element transformation, 74 which iteratively transforms low quality elements to regular, hence perfect 75 elements, mesh improvement is accomplished by sequentially improving  ...  As in the case of smart Laplacian smoothing, the solution of this 51 minimization problem is only applied if quality is improved.  ...  In the case of 374 a transformation success, the penalty value is decreased by Δπ s , since the mean ratio quality itself is improved.  ... 
doi:10.1016/j.cma.2010.09.012 fatcat:xcamnhxgybfdtcrwqbz2j63j7q

LCQS: an efficient lossless compression tool of quality scores with random access functionality

Jiabing Fu, Bixin Ke, Shoubin Dong
2020 BMC Bioinformatics  
Existing lossless compressors of quality scores mainly utilize specific patterns generated by specific sequencer and complex context modeling techniques to solve the problem of low compression ratio.  ...  Furthermore, LCQS presents strong robustness on all the test datasets, with its acceleration ratios of compression speed increasing by up to 29.1x, its file size reducing by up to 28.78%, and its random  ...  Acknowledgments We would like to thank the Editor and the Reviewers for their precious comments on this work which helped improve the quality of this paper. We  ... 
doi:10.1186/s12859-020-3428-7 pmid:32183707 fatcat:msy2uzpph5e4jgumzw35ph7fne

Numerical Probabilistic Load Flow Analysis in Modern Power Systems with Intermittent Energy Sources

Filip Mišurović, Saša Mujović
2022 Energies  
It focuses on numerical techniques examining them for simple random and Latin Hypercube sampling, vastly applied in previous works, and proposes a method combining Monte Carlo simulations with Halton quasi-random  ...  The DLF gives a snapshot of the system state neglecting all of the uncertainties arising from intermittent DG driven by variable weather conditions or volatile consumption.  ...  Simulation Algorythm First, 100,000 values of consumption, wind and solar generation data are sampled by simple random sampling and used for the same number of DLF calculations by applying MATPOWER, a  ... 
doi:10.3390/en15062038 fatcat:jvlca7o4frc4jbgdgooss2p4he

Shapelet Classification Algorithm Based on Efficient Subsequence Matching

Huiqing Wang, Chun Li, Hongwei Sun, Zhirong Guo, Yingying Bai
2018 Data Science Journal  
accuracy, effectively simplified the algorithm calculation process, and improved classification efficiency.  ...  First, the proposed algorithm took the PAA representation for appropriate dimension reduction, and then used a subsequence matching algorithm to simplify the data classification process.  ...  Figure 4 (a) shows the ROC curve by applying the direct classification without shapelet extraction.  ... 
doi:10.5334/dsj-2018-006 fatcat:ymw7zroie5culgt6owalfd7urm

The effect of temporal fluctuations in r 0 on high-resolution observations

Robert N. Tubbs
2006 Advances in Adaptive Optics II  
Also discussed is the improvement in performance which can be obtained by modifying the AO control parameters in response to the changing seeing conditions.  ...  The statistics of the intermittency model used are based as closely as possible on astronomical seeing measurements at real observatories.  ...  , the wind shift can be applied in the Fourier domain, thus reducing the total number of Fourier transform operations by one).  ... 
doi:10.1117/12.671170 fatcat:m2iqp7ubrvdtthrdn6vgw2s7le

Image Restoration Using Joint Statistical Modeling in a Space-Transform Domain

Jian Zhang, Debin Zhao, Ruiqin Xiong, Siwei Ma, Wen Gao
2014 IEEE transactions on circuits and systems for video technology (Print)  
First, from the perspective of image statistics, a joint statistical modeling (JSM) in an adaptive hybrid space-transform domain is established, which offers a powerful mechanism of combining local smoothness  ...  This paper presents a novel strategy for high-fidelity image restoration by characterizing both local smoothness and nonlocal self-similarity of natural images in a unified statistical manner.  ...  ACKNOWLEDGMENT The authors would like to thank the authors of [12] , [15] , [21] , [28] , [35] , [36] , [37] , [38] , [46] , and [52] for kindly providing their codes.  ... 
doi:10.1109/tcsvt.2014.2302380 fatcat:wymh3mnjtrc73cal6kt2h25ckm
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