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A New Reliability Ratio Weighted Bit Flipping Algorithm for Decoding LDPC Codes

Chakir Aqil, Ismail Akharraz, Abdelaziz Ahaitouf, Simone Morosi
2021 Wireless Communications and Mobile Computing  
This algorithm improves the "Reliability Ratio Weighted Bit Flipping" (RRWBF) algorithm by modifying the reliability ratio.  ...  In this study, we propose a "New Reliability Ratio Weighted Bit Flipping" (NRRWBF) algorithm for Low-Density Parity-Check (LDPC) codes.  ...  Calculate the inversion function for each variable node by E n = ∑ m∈CðnÞ ð2s m − 1Þ ðd r · y min m /jy n jÞ: Step 3.  ... 
doi:10.1155/2021/6698602 fatcat:j267cjqdxrbi5hg4vh26ni4p5e

A New Approach to Symmetry Reliability: Combination of Forward and Inverse Reliability Principle and Its Application to Frame Structures and Bamboo Bridges

Fenghui Dong, Jie Gao, Aijin Hao, Yang Wei, Xin Huang, Feng Shi, Kaiqi Zheng
2022 Symmetry  
In this paper, a new inverse reliability analysis method is proposed, which can satisfy the requirements of the target reliability index while obtaining the design parameters, without additional calculation  ...  the reliability index for each design parameter to gradually approach the target reliability index.  ...  BK20200793) and the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 19KJB560017) for their financial support.  ... 
doi:10.3390/sym14020318 fatcat:ybw46ud7lzczteorzmsfhalv3i

An improvement and a fast DSP implementation of the bit flipping algorithms for low density parity check decoder

Mouhcine Razi, Mhammed Benhayoun, Anass Mansouri, Ali Ahaitouf
2021 International Journal of Power Electronics and Drive Systems (IJPEDS)  
An adaptative weighting and correction factor is introduced in each case to improve the performances of the two algorithms allowing an important gain of bit error rate.  ...  In order to reduce this gap, in this work we introduce two new improved versions of the hard-decision algorithms, the adaptative gradient descent bit-flipping (AGDBF) and adaptative reliability ratio weighted  ...  These works use an additive or multiplicative weighting factors in Δk(x) to evaluate the reliability of syndromes [15] , [16] . Kou et al.  ... 
doi:10.11591/ijece.v11i6.pp4774-4784 fatcat:h7delwmk3bfhvcxavjxyrkhjoq

An Improved Affine Algorithm for the Non-Probabilistic Reliability Index of Interval Model

Sun Jianping, Yiping Luo, Tang Zhaoping, Hu Yutao, Zhou Xinjian
2016 International Journal of Control and Automation  
first degree item, quadratic term, even the multiple-item and the nonlinear term expressed by the same noise, this paper proposed an improved algorithm which took affine algorithm operation as the main  ...  When it applied to calculate the nonprobabilistic reliability index, the calculation results has higher accuracy than the interval arithmetic and the conventional affine algorithm, and it has strong practical  ...  To further overcome these limitations, since affine form and interval form of the uncertain variable have a mutual transformation, this paper proposed an improved algorithm which takes affine algorithm  ... 
doi:10.14257/ijca.2016.9.4.33 fatcat:r2zovhclpnf3npjazv2z37r3t4

Statistical Comparison of Two Sum-of-Disjoint-Product Algorithms for Reliability and Safety Evaluation [chapter]

Klaus Heidtmann
2002 Lecture Notes in Computer Science  
The evaluation of system reliability and safety is important for the design of new systems and the improvement or further development of existing systems.  ...  of both algorithms for a large sample of randomly generated systems.  ...  Further work on this technique of single variable inversion yielded only marginal improvements.  ... 
doi:10.1007/3-540-45732-1_9 fatcat:wy3ktgwmovhohjykf6dkhehtwa

A survey of efficient reliability computation using disjoint products approach

Suresh Rai, Malathi Veeraraghavan, Kishor S. Trivedi
1995 Networks  
We also overview three multiple variable inversion algorithms that result in sum of disjoint products expressions with fewer terms than that of algorithms that use only a single-variable inversion.  ...  In addition, it is possible to devise an exact algorithm for calculating the two-terminal reliability of G that is polynomial in the number of mincuts [ 191.  ...  Three SDP algorithms that use multiple variable inversion to improve computing time are also discussed.  ... 
doi:10.1002/net.3230250308 fatcat:cpsaosya7rap7fheobxx5bzxdi

An improved algorithm for symbolic reliability analysis

M. Veeraraghavan, K.S. Trivedi
1991 IEEE Transactions on Reliability  
Next, we illustrate our improvements in the use of multiple variable inversion technique for this problem using two examples.  ...  The algorithm uses the concept of multiple variable inversion originally proposed by Grnarov, Meinrock, Gerla (1979). We fwst present our algorithm.  ...  The GKG-VT algorithm builds on this multiple-variable inversion concept and on PROB to obtain an improved sdp algorithm for the UPP using algebra based on the Miller cube representation of Boolean products  ... 
doi:10.1109/24.85455 fatcat:upsrnuwkrzeipd7oe6223lazhm

An Inversion Approach to Ultrasonic Imaging through Reflective Interfaces in Multi-Layered Structures [chapter]

K. I. McRae, C. A. Zala
1993 Review of Progress in Quantitative Nondestructive Evaluation  
Although this algorithm has provided accurate and reliable inversion results for less reflective interfaces, no usable result was obtained from the application of this inversion algorithm.  ...  MULTIPLE ELIMINATION BY INVERSION One approach to the problem of elimination of multiple reflections from the ultrasonic image would be to perform a complete inversion of the ultrasonic data, i.e. to calculate  ... 
doi:10.1007/978-1-4615-2848-7_105 fatcat:45ylvddxvzd2do6pswce4spntq

Inverse Response Surface Method in Reliability-Based Design

David Lehký, Martina Šomodíková
2017 Transactions of the VŠB: Technical University of Ostrava, Civil Engineering Series  
The paper introduces an inverse response surface method utilized when performing reliability-based design optimization of time-consuming problems.  ...  Proposed procedure is based on a coupling of the adaptive response surface method and the artificial neural network-based inverse reliability method.  ...  ACKNOWLEDGMENT The authors give thanks for the support provided from Czech Science Foundation (GAČR) project FIRBO No. 15-07730S, and from project No.  ... 
doi:10.1515/tvsb-2017-0025 fatcat:2in43cxn6fh3rpcraavbz42onu

Grid Frequency Estimation Using Multiple Model with Harmonic Regressor: Robustness Enhancement with Stepwise Splitting Method

Alexander Stotsky
2017 IFAC-PapersOnLine  
A new stepwise splitting method is proposed for elimination of instability and for performance improvement of matrix inversion algorithms in the multiple model.  ...  Additional challenges associated with computational complexity of matrix inversion algorithms and accuracy of inversion of ill-conditioned matrices in the multiple model are also discussed in the paper  ...  Splitting (21) -(26) facilitates calculation of the inverse of matrix A, which can be used as a preconditioner for algorithm (18)-(20).  ... 
doi:10.1016/j.ifacol.2017.08.1930 fatcat:xzpgunfyrrhgdh2e6iiqq5pntm

Inverse parameter identification of cohesive zone model for simulating mixed-mode crack propagation

Yangjian Xu, Xiangyu Li, Xiaogui Wang, Lihua Liang
2014 International Journal of Solids and Structures  
In order to improve the computational efficiency of the inverse method based on the genetic algorithm, an interpolation scheme upon the response surface constructed by the finite element simulation has  ...  However, literature studies show that the adoption of multiple types of experimental information is useful to improve the accuracy of inverse analysis.  ...  It is quite an important step for obtaining an accurate result of inverse analysis.  ... 
doi:10.1016/j.ijsolstr.2014.03.008 fatcat:mgo74jv5onhgfhqltcpgflwmfa

Development of the inversion method for transient electromagnetic data

Guoqiang Xue, Hai Li, Yiming He, Junjie Xue, Xin Wu
2020 IEEE Access  
It is essential to choose the optimal inversion algorithm for a TEM survey in a given geological setting.  ...  For the deterministic method, we present the development of constrained inversion and joint inversion.  ...  [19] combined an adaptive genetic algorithm with the feasible region method to calculate the longitudinal conductance of TEM, which improved the accuracy of the inversion result. Li et al.  ... 
doi:10.1109/access.2020.3013626 fatcat:i4hty75sbbgbbks3adzlqvgt5a

Inverse reliability measures and reliability-based design optimisation

Palaniappan Ramu, Xueyong Qu, Byeng Dong Youn, Raphael T. Haftka, Kyung K. Choi
2006 International Journal of Reliability and Safety  
RBDO with inverse measure is demonstrated with a beam design example. ) 'Inverse reliability measures and reliability-based design optimisation', Int. the InfoTech -Pratt and Whitney centre for excellence  ...  These advantages include improved computational efficiency of Reliability-Based Design Optimisation (RBDO), accuracy in Response Surface Approximations (RSAs) and easy estimates of resources needed for  ...  Acknowledgements This work has been funded in part through NASA Cooperative Agreement NCC3-994, the 'Institute for Future Space Transport' University Research, Engineering and Technology Institute.  ... 
doi:10.1504/ijrs.2006.010697 fatcat:gnxvojeh5rb2pbdfx4h5zqa324

Estimation of Ground PM2.5 Concentrations using a DEM-assisted Information Diffusion Algorithm: A Case Study in China

Lei Ma, Yu Gao, Tengyu Fu, Liang Cheng, Zhenjie Chen, Manchun Li
2017 Scientific Reports  
The results showed that: (1) reliable estimate at local area was obtained using the DEM-assisted information diffusion algorithm; (2) the information diffusion algorithm was more applicable for estimating  ...  as Inverse Distance Weighted and Ordinary Kriging).  ...  If the structured variable Z is not constant and the mathematical expectation is unknown, the Ordinary Kriging algorithm can be used for interpolation calculation.  ... 
doi:10.1038/s41598-017-14197-z pmid:29138390 pmcid:PMC5686213 fatcat:6qiyk6z3qvdurlssyosydkxnlq

Preprocessing minpaths for sum of disjoint products

A.O. Balan, L. Traldi
2003 IEEE Transactions on Reliability  
It is also observed that optimal preprocessing for SVI-SDP can be different from optimal preprocessing for SDP algorithms which use multiple-variable inversion; one reason for this is that MVI-SDP algorithms  ...  This paper gives examples for which this strategy is not optimal. A new preprocessing strategy which works well for SDP algorithms with single-variable inversion (SVI) is introduced.  ...  to analyze the conjunctions of negations that appear in the disjoint events , • the fact that some SDP algorithms use multiple-variable inversion and some don't.  ... 
doi:10.1109/tr.2003.816403 fatcat:xr6wobplubhwlbzvvag3ixhqyy
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