Log in

Relevant bibliographies by topics / Inverse codes / Journal articles

To see the other types of publications on this topic, follow the link: Inverse codes.

Journal articles on the topic 'Inverse codes'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Inverse codes.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Beletsky, Anatoly. "Direct Synthesis Algorithms for Primitive Walsh Function Systems." WSEAS TRANSACTIONS ON SIGNAL PROCESSING 21 (June 3, 2025): 82–91. https://doi.org/10.37394/232014.2025.21.10.

Full text

Abstract:

This paper develops algorithms for the direct synthesis of primitive Walsh systems generated by permutations of the basis functions of the Walsh-Paley mother system by simple Gray codes (SGCs). The algorithms are based on indicator matrices (IMs) of Walsh systems and tables of transitions from the mother system to one or another primitive system. Indicator matrices are n-th order symmetric with respect to the auxiliary diagonal, nondegenerate over , uniquely defining Walsh systems of N-th order, $$( N=2^{n}) . The PCG subset includes both classical, named left- sided), and alternative (right-s

APA, Harvard, Vancouver, ISO, and other styles

2

Yoo, Seungsoo, and Sun-Yong Kim. "Design of Binary Walsh-Gray and Inverse Gray Codes for RNSS Binary Coded Symbol Modulation." Journal of Korean Institute of Communications and Information Sciences 49, no. 6 (2024): 825–28. http://dx.doi.org/10.7840/kics.2024.49.6.825.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Usha, K. "Generation of Walsh codes in two different orderings using 4-bit Gray and Inverse Gray codes." Indian Journal of Science and Technology 5, no. 3 (2012): 1–5. http://dx.doi.org/10.17485/ijst/2012/v5i3.29.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Rabin, A. V., S. V. Michurin, and V. A. Lipatnikov. "DEVELOPMENT OF A CLASS OF SYSTEM AND RETURN SYSTEM MATRIXES PROVIDING INCREASE IN NOISE IMMUNITY OF SPECTRALLY EFFECTIVE MODULATION SCHEMES ON BASIS OF ORTHOGONAL CODING." Issues of radio electronics, no. 10 (October 20, 2018): 75–79. http://dx.doi.org/10.21778/2218-5453-2018-10-75-79.

Full text

Abstract:

In work it is proposed in the digital systems of messages transmission for noise immunity's increase with the fixed code rate to use an additional coding called by the authors orthogonal. The way of a definition of orthogonal codes is presented, the synthesis algorithm of system and inverse system matrices of orthogonal codes is developed, and the main parameters of some matrices constructed by the offered algorithm are specified. Orthogonal coding as a special case of convolutional coding is defined by matrices, which elements are polynomials in the delay variable with integer coefficients. C

APA, Harvard, Vancouver, ISO, and other styles

5

Shalin, Georgiy, Dmitriy Pokamestov, Yakov Kryukov, Artem Shinkevich, Andrey Brovkin, and Eugeniy Rogozhnikov. "Differential properties of polar codes." E3S Web of Conferences 376 (2023): 01060. http://dx.doi.org/10.1051/e3sconf/202337601060.

Full text

Abstract:

This paper discusses the features of polar coding as a differential encoder for a binary erasure channel. One of the modern methods of error-correcting coding is polar codes, which has great prospects in the development of current and future wireless communication systems. At the moment, polar coding is used only in fifth-generation systems. In this paper, a description of polar coding is presented, a description of a polar decoding algorithm capable of restoring messages with an error probability close to 1 is presented, and a general model of a binary channel with erasures is described. The

APA, Harvard, Vancouver, ISO, and other styles

6

Al-Sammak, A. J., and R. S. K. Al-Alawi. "An Encoder for Differential Manchester and Inverse Differential Manchester Line Codes." IEEJ Transactions on Electronics, Information and Systems 125, no. 2 (2005): 379–80. http://dx.doi.org/10.1541/ieejeiss.125.379.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Négadi, Tidjani. "The Genetic Codes: Mathematical Formulae and an Inverse Symmetry-Information Relationship." Information 8, no. 1 (2016): 6. http://dx.doi.org/10.3390/info8010006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Birget, Jean-Camille, and Stuart W. Margolis. "Two-letter group codes that preserve aperiodicity of inverse finite automata." Semigroup Forum 76, no. 1 (2007): 159–68. http://dx.doi.org/10.1007/s00233-007-9024-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Ibáñez, Javier, Jorge Sastre, Pedro Ruiz, José M. Alonso, and Emilio Defez. "An Improved Taylor Algorithm for Computing the Matrix Logarithm." Mathematics 9, no. 17 (2021): 2018. http://dx.doi.org/10.3390/math9172018.

Full text

Abstract:

The most popular method for computing the matrix logarithm is a combination of the inverse scaling and squaring method in conjunction with a Padé approximation, sometimes accompanied by the Schur decomposition. In this work, we present a Taylor series algorithm, based on the free-transformation approach of the inverse scaling and squaring technique, that uses recent matrix polynomial formulas for evaluating the Taylor approximation of the matrix logarithm more efficiently than the Paterson–Stockmeyer method. Two MATLAB implementations of this algorithm, related to relative forward or backward

APA, Harvard, Vancouver, ISO, and other styles

10

Alabiad, Sami, and Yousef Alkhamees. "Constacyclic Codes over Finite Chain Rings of Characteristic p." Axioms 10, no. 4 (2021): 303. http://dx.doi.org/10.3390/axioms10040303.

Full text

Abstract:

Let R be a finite commutative chain ring of characteristic p with invariants p,r, and k. In this paper, we study λ-constacyclic codes of an arbitrary length N over R, where λ is a unit of R. We first reduce this to investigate constacyclic codes of length ps (N=n1ps,p∤n1) over a certain finite chain ring CR(uk,rb) of characteristic p, which is an extension of R. Then we use discrete Fourier transform (DFT) to construct an isomorphism γ between R[x]/<xN−λ> and a direct sum ⊕b∈IS(rb) of certain local rings, where I is the complete set of representatives of p-cyclotomic cosets modulo n1. By

APA, Harvard, Vancouver, ISO, and other styles

11

Duc-Minh Pham, A. B. Premkumar, and A. S. Madhukumar. "Error Detection and Correction in Communication Channels Using Inverse Gray RSNS Codes." IEEE Transactions on Communications 59, no. 4 (2011): 975–86. http://dx.doi.org/10.1109/tcomm.2011.022811.100092.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Delfosse, Nicolas, and Naomi H. Nickerson. "Almost-linear time decoding algorithm for topological codes." Quantum 5 (December 2, 2021): 595. http://dx.doi.org/10.22331/q-2021-12-02-595.

Full text

Abstract:

In order to build a large scale quantum computer, one must be able to correct errors extremely fast. We design a fast decoding algorithm for topological codes to correct for Pauli errors and erasure and combination of both errors and erasure. Our algorithm has a worst case complexity of O(nα(n)), where n is the number of physical qubits and α is the inverse of Ackermann's function, which is very slowly growing. For all practical purposes, α(n)≤3. We prove that our algorithm performs optimally for errors of weight up to (d−1)/2 and for loss of up to d−1 qubits, where d is the minimum distance o

APA, Harvard, Vancouver, ISO, and other styles

13

Savova, Zhaneta, and Rosen Bogdanov. "SOME SPECIFIC FEATURES IN THE CONSTRUCTION OF P-ARY REED-SOLOMON CODES FOR AN ARBITRARY PRIME P." ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 4 (June 22, 2024): 237–43. http://dx.doi.org/10.17770/etr2024vol4.8212.

Full text

Abstract:

The Reed-Solomon (RS) codes, proposed in 1960 by Irving Reed and Gustav Solomon as a subset of error-correcting codes, have many current applications. The most significant of which are data recovery in storage systems, including hard drives, minidiscs, CDs, DVDs, Google's GFS, BigTable, and RAID 6, as well as in communication systems such as DSL, WiMAX, DVB, ATSC, and satellite communications. Additionally, RS codes are used as Bar codes in management and advertising systems, such as PDF-417, MaxiCode, Datamatrix, QR Code, and Aztec Code. Nowadays, RS codes over Galois Fields GF(2m) with base

APA, Harvard, Vancouver, ISO, and other styles

14

Giusti, Chad, and Vladimir Itskov. "A No-Go Theorem for One-Layer Feedforward Networks." Neural Computation 26, no. 11 (2014): 2527–40. http://dx.doi.org/10.1162/neco_a_00657.

Full text

Abstract:

It is often hypothesized that a crucial role for recurrent connections in the brain is to constrain the set of possible response patterns, thereby shaping the neural code. This implies the existence of neural codes that cannot arise solely from feedforward processing. We set out to find such codes in the context of one-layer feedforward networks and identified a large class of combinatorial codes that indeed cannot be shaped by the feedforward architecture alone. However, these codes are difficult to distinguish from codes that share the same sets of maximal activity patterns in the presence o

APA, Harvard, Vancouver, ISO, and other styles

15

K. Patel, Rinkal, and Irfan Poladi. "A STUDY PAPER ON ERROR CORRECTING OUTPUT CODE BUILD ON MULTICLASS CLASSIFICATION." International Journal of Engineering Applied Sciences and Technology 7, no. 10 (2023): 124–28. http://dx.doi.org/10.33564/ijeast.2023.v07i10.016.

Full text

Abstract:

Error-correcting output codes is a technique for using binary classification models on multi-class classification prediction tasks. Error-Correcting Output Codes (ECOC) represents a successful framework to deal with these kinds of problems. Recent works in the ECOC framework appear notable performance improvements. The ECOC framework is a high-level tool to deal with multi-class categorization problems. As the error correcting output codes have error correcting ability and improve the generalization ability to base classification. This library contains both modern coding (one-versus-one, one-v

APA, Harvard, Vancouver, ISO, and other styles

16

Noorizadegan, Amir, Chuin-Shan Chen, and Der-Liang Young. "Deep residual network for interpolation and inverse problems." Journal of Physics: Conference Series 2766, no. 1 (2024): 012093. http://dx.doi.org/10.1088/1742-6596/2766/1/012093.

Full text

Abstract:

Abstract In this paper, we introduce the Power-Enhancing Residual Network, a simplified version of the highway network. This novel neural network architecture aims to enhance interpolation capabilities. By incorporating power terms in residual elements, this architecture enhances the network’s expressive capacity, leading to new possibilities in deep learning. We explore key design aspects such as network depth, width, and optimization techniques, showcasing its adaptability and performance advantages. Results highlight its precision and demonstrate superiority over conventional networks in ac

APA, Harvard, Vancouver, ISO, and other styles

17

AL-ALAWI, RAIDA, and A. J. AL-SAMMAK. "DESIGN OF A MULTICODE BI-PHASE ENCODER FOR DATA TRANSMISSION." Journal of Circuits, Systems and Computers 15, no. 01 (2006): 1–12. http://dx.doi.org/10.1142/s0218126606002897.

Full text

Abstract:

In this paper, we present a versatile Multicode Bi-Phase Encoder (MBPE) circuit capable of encoding five different Bi-Phase line codes, namely: Bi-Phase-Level (Bi-Φ-L), Bi-Phase-Mark (Bi-Φ-M), Bi-Phase-Space (Bi-Φ-S), Differential Manchester (DM) and Inverse Differential Manchester (IDM) codes. The design methodology is based on a new definition of these codes in terms of encoding rules and state diagrams, instead of the traditional way of representing them in terms of their bit transition. The operation mode of the MBPE is set by three selection lines, which can be either hardware or software

APA, Harvard, Vancouver, ISO, and other styles

18

Higueras, Manuel, Pedro Puig, Elizabeth A. Ainsbury, and Kai Rothkamm. "A new inverse regression model applied to radiation biodosimetry." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 471, no. 2174 (2015): 20140588. http://dx.doi.org/10.1098/rspa.2014.0588.

Full text

Abstract:

Biological dosimetry based on chromosome aberration scoring in peripheral blood lymphocytes enables timely assessment of the ionizing radiation dose absorbed by an individual. Here, new Bayesian-type count data inverse regression methods are introduced for situations where responses are Poisson or two-parameter compound Poisson distributed. Our Poisson models are calculated in a closed form, by means of Hermite and negative binomial (NB) distributions. For compound Poisson responses, complete and simplified models are provided. The simplified models are also expressible in a closed form and in

APA, Harvard, Vancouver, ISO, and other styles

19

Peng, Chen, and Dong. "Experimental Data Assessment and Fatigue Design Recommendation for Stainless-Steel Welded Joints." Metals 9, no. 7 (2019): 723. http://dx.doi.org/10.3390/met9070723.

Full text

Abstract:

Stainless steel possesses outstanding advantages such as good corrosion resistance and long service life. Stainless steel is one of the primary materials used for sustainable structures, and welding is one of the main connection modes of stainless-steel bridges and other structures. Therefore, fatigue damage at welded joints deserves attention. The existing fatigue design codes of stainless-steel structures mainly adopt the design philosophy of structural steel. In order to comprehensively review the published fatigue test data of welded joints in stainless steel, in this paper, the fatigue te

APA, Harvard, Vancouver, ISO, and other styles

20

Kalidindi, Surya R., J. Houskamp, G. Proust, and H. Duvvuru. "Microstructure Sensitive Design with First Order Homogenization Theories and Finite Element Codes." Materials Science Forum 495-497 (September 2005): 23–30. http://dx.doi.org/10.4028/www.scientific.net/msf.495-497.23.

Full text

Abstract:

A mathematical framework called Microstructure Sensitive Design (MSD) has been developed recently to solve inverse problems of materials design, where the goal is to identify the class of microstructures that are predicted to satisfy a set of designer specified objectives and constraints [1]. This paper demonstrates the application of the MSD framework to a specific case study involving mechanical design. Processing solutions to obtain one of the elements of the desired class of textures are also explored within the same framework.

APA, Harvard, Vancouver, ISO, and other styles

21

Ibáñez, Javier, José M. Alonso, Emilio Defez, Pedro Alonso-Jordá, and Jorge Sastre. "Computing the Matrix Logarithm with the Romberg Integration Method." Algorithms 16, no. 9 (2023): 434. http://dx.doi.org/10.3390/a16090434.

Full text

Abstract:

The matrix logarithm function has applicability in many engineering and science fields. Improvements in its calculation, from the point of view of both accuracy and/or execution time, have a direct impact on these disciplines. This paper describes a new numerical algorithm devoted to matrix logarithm computation and using the Romberg integration method, together with the inverse scaling and squaring technique. This novel method was implemented and compared with three different state-of-the-art codes, all based on Padé approximation. The experimental results, under a heterogeneous matrix test b

APA, Harvard, Vancouver, ISO, and other styles

22

Eddahmani, Said, and Sihem Mesnager. "The c-Differential-Linear Connectivity Table of Vectorial Boolean Functions." Entropy 26, no. 3 (2024): 188. http://dx.doi.org/10.3390/e26030188.

Full text

Abstract:

Vectorial Boolean functions and codes are closely related and interconnected. On the one hand, various requirements of binary linear codes are needed for their theoretical interests but, more importantly, for their practical applications (such as few-weight codes or minimal codes for secret sharing, locally recoverable codes for storage, etc.). On the other hand, various criteria and tables have been introduced to analyse the security of S-boxes that are related to vectorial Boolean functions, such as the Differential Distribution Table (DDT), the Boomerang Connectivity Table (BCT), and the Di

APA, Harvard, Vancouver, ISO, and other styles

23

Xie, Chunli, Xia Wang, Cheng Qian, and Mengqi Wang. "A Source Code Similarity Based on Siamese Neural Network." Applied Sciences 10, no. 21 (2020): 7519. http://dx.doi.org/10.3390/app10217519.

Full text

Abstract:

Finding similar code snippets is a fundamental task in the field of software engineering. Several approaches have been proposed for this task by using statistical language model which focuses on syntax and structure of codes rather than deep semantic information underlying codes. In this paper, a Siamese Neural Network is proposed that maps codes into continuous space vectors and try to capture their semantic meaning. Firstly, an unsupervised pre-trained method that models code snippets as a weighted series of word vectors. The weights of the series are fitted by the Term Frequency-Inverse Doc

APA, Harvard, Vancouver, ISO, and other styles

24

Samanta, Supriti, Goutam K. Maity, and Subhadipta Mukhopadhyay. "Implementation of Orthogonal Codes Using MZI." Micro and Nanosystems 12, no. 3 (2020): 159–67. http://dx.doi.org/10.2174/1876402912666200211121624.

Full text

Abstract:

Background: In Code Division Multiple Access (CDMA)/Multi-Carrier CDMA (MCCDMA), Walsh-Hadamard codes are widely used for its orthogonal characteristics, and hence, it leads to good contextual connection property. These orthogonal codes are important because of their various significant applications. Objective: To use the Mach–Zehnder Interferometer (MZI) for all-optical Walsh-Hadamard codes is implemented in this present paper. Method: The Mach–Zehnder Interferometer (MZI) is considered for the Tree architecture of Semiconductor Optical Amplifier (SOA). The second-ordered Hadamard and the inv

APA, Harvard, Vancouver, ISO, and other styles

25

Dixon, J. R., B. A. Lindley, T. Taylor, and G. T. Parks. "DATA ASSIMILATION APPLIED TO PRESSURISED WATER REACTORS." EPJ Web of Conferences 247 (2021): 09020. http://dx.doi.org/10.1051/epjconf/202124709020.

Full text

Abstract:

Best estimate plus uncertainty is the leading methodology to validate existing safety margins. It remains a challenge to develop and license these approaches, in part due to the high dimensionality of system codes. Uncertainty quantification is an active area of research to develop appropriate methods for propagating uncertainties, offering greater scientific reason, dimensionality reduction and minimising reliance on expert judgement. Inverse uncertainty quantification is required to infer a best estimate back on the input parameters and reduce the uncertainties, but it is challenging to capt

APA, Harvard, Vancouver, ISO, and other styles

26

Błasiok, Jarosław, Venkatesan Guruswami, Preetum Nakkiran, Atri Rudra, and Madhu Sudan. "General Strong Polarization." Journal of the ACM 69, no. 2 (2022): 1–67. http://dx.doi.org/10.1145/3491390.

Full text

Abstract:

Arıkan’s exciting discovery of polar codes has provided an altogether new way to efficiently achieve Shannon capacity. Given a (constant-sized) invertible matrix M , a family of polar codes can be associated with this matrix and its ability to approach capacity follows from the polarization of an associated [0, 1]-bounded martingale, namely its convergence in the limit to either 0 or 1 with probability 1. Arıkan showed appropriate polarization of the martingale associated with the matrix ( G 2 = ( 1 1 0 1) to get capacity achieving codes. His analysis was later extended to all matrices M that

APA, Harvard, Vancouver, ISO, and other styles

27

Wagenpfeil, Stefan, Paul Mc Kevitt, Abbas Cheddad, and Matthias Hemmje. "Explainable Multimedia Feature Fusion for Medical Applications." Journal of Imaging 8, no. 4 (2022): 104. http://dx.doi.org/10.3390/jimaging8040104.

Full text

Abstract:

Due to the exponential growth of medical information in the form of, e.g., text, images, Electrocardiograms (ECGs), X-rays, and multimedia, the management of a patient’s data has become a huge challenge. In particular, the extraction of features from various different formats and their representation in a homogeneous way are areas of interest in medical applications. Multimedia Information Retrieval (MMIR) frameworks, like the Generic Multimedia Analysis Framework (GMAF), can contribute to solving this problem, when adapted to special requirements and modalities of medical applications. In thi

APA, Harvard, Vancouver, ISO, and other styles

28

Yousef and Hamdy. "Three-Stage Estimation of the Mean and Variance of the Normal Distribution with Application to an Inverse Coefficient of Variation with Computer Simulation." Mathematics 7, no. 9 (2019): 831. http://dx.doi.org/10.3390/math7090831.

Full text

Abstract:

This paper considers sequentially two main problems. First, we estimate both the mean and the variance of the normal distribution under a unified one decision framework using Hall’s three-stage procedure. We consider a minimum risk point estimation problem for the variance considering a squared-error loss function with linear sampling cost. Then we construct a confidence interval for the mean with a preassigned width and coverage probability. Second, as an application, we develop Fortran codes that tackle both the point estimation and confidence interval problems for the inverse coefficient of

APA, Harvard, Vancouver, ISO, and other styles

29

Biba, Yuri, and Peter Menegay. "Inverse Design of Centrifugal Compressor Stages Using a Meanline Approach." International Journal of Rotating Machinery 10, no. 1 (2004): 75–84. http://dx.doi.org/10.1155/s1023621x04000089.

Full text

Abstract:

This article discusses an approach for determining meanline geometric parameters of centrifugal compressor stages given specified performance requirements. This is commonly known as the inverse design approach. The opposite process, that of calculating performance parameters based on geometry input is usually called analysis, or direct calculation. An algorithm and computer code implementing the inverse approach is described. As an alternative to commercially available inverse design codes, this tool is intended for exclusive OEM use and calls a trusted database of loss models for individual s

APA, Harvard, Vancouver, ISO, and other styles

30

KIM, HYUN KEOL, and ANDREAS H. HIELSCHER. "A DIFFUSION–TRANSPORT HYBRID METHOD FOR ACCELERATING OPTICAL TOMOGRAPHY." Journal of Innovative Optical Health Sciences 03, no. 04 (2010): 293–305. http://dx.doi.org/10.1142/s1793545810001143.

Full text

Abstract:

It is well acknowledged that the equation of radiative transfer (ERT) provides an accurate prediction of light propagation in biological tissues, while the diffusion approximation (DA) is of limited accuracy for the transport regime. However, ERT-based reconstruction codes require much longer computation times as compared to DA-based reconstruction codes. We introduce here a computationally efficient algorithm, called a diffusion–transport hybrid solver, that makes use of the DA- or low-order ERT-based inverse solution as an initial guess for the full ERT-based reconstruction solution. To eval

APA, Harvard, Vancouver, ISO, and other styles

31

HU, YI-QIANG, BING-FEI WU, and CHORNG-YANN SU. "A DISCRETE WAVELET TRANSFORM CODEC DESIGN." Journal of Circuits, Systems and Computers 13, no. 06 (2004): 1347–78. http://dx.doi.org/10.1142/s021812660400201x.

Full text

Abstract:

This manuscript presents a VLSI architecture and its design rule, called embedded instruction code (EIC), to realize discrete wavelet transform (DWT) codec in a single chip. Since the essential computation of DWT is convolution, we build a set of multiplication instruction, MUL, and the addition instruction, ADD, to complete the work. We segment the computation paths of DWT according to the multiplication and addition, and apply the instruction codes to execute the operators. Besides, we offer a parallel arithmetic logic unit (PALU) organization that is composed of two multipliers and four add

APA, Harvard, Vancouver, ISO, and other styles

32

Lin, Chin-Feng. "UFMC-Based Underwater Voice Transmission Scheme with LDPC Codes." Applied Sciences 11, no. 4 (2021): 1818. http://dx.doi.org/10.3390/app11041818.

Full text

Abstract:

An underwater universal filtered multicarrier (UFMC)-based voice transmission scheme is proposed using a 512-point inverse discrete Fourier transform, utilizing 10 sub-bands, and that each had 20 subcarriers. In this proposed UFMC method, the adaptive modulation technologies with 4 quadrature amplitude modulation (QAM), 16-QAM, and low-density parity-check (LDPC) channel coding were integrated. Additionally, the bit error rate (BER), transmission power weighting, the ratios of power-saving, and underwater voice transmission performance with perfect channel estimation (PCE), and 5% and 10% chan

APA, Harvard, Vancouver, ISO, and other styles

33

Nicolet, Frank, Denis Bujoreanu, Ewen Carcreff, Hervé Liebgott, Denis Friboulet, and Barbara Nicolas. "Simultaneous Coded Plane-Wave Imaging Using an Advanced Ultrasound Forward Model." Applied Sciences 12, no. 24 (2022): 12809. http://dx.doi.org/10.3390/app122412809.

Full text

Abstract:

In the quest for higher acquisition rates of ultrasound images, the simultaneous emission of encoded waves has the potential to overcome the trade-off between acquisition time and image quality. However, the lack of fully orthogonal codes has led to the use of forward models and inverse problem approaches to estimate the imaged medium. Nonetheless, due to some simplifying assumptions on which these models rely, the previously stated trade-off still appears in these acquisition/reconstruction schemes. In this paper, a forward model for ultrasound wave propagation inside a scattering medium is d

APA, Harvard, Vancouver, ISO, and other styles

34

Kruger, Paul A. "Symbolic Inversion in Death: Some Examples from the Old Testament and the Ancient Near Eastern world." Verbum et Ecclesia 26, no. 2 (2005): 398–411. http://dx.doi.org/10.4102/ve.v26i2.232.

Full text

Abstract:

Symbolic inversion is a widespread cultural phenomenon, the earliest examples of which can be traced back to the cultures of the ancient Near East. Symbolic inversion (mundus inversus) relates to those forms of expressive behaviour which invert commonly accepted social codes. One such area in the ancient Near Eastern and Old Testament world where this phenomenon manifested itself prominently is in the conception of life after death: life after death is often conceived as the direct inverse of what is customary in ordinary life.

APA, Harvard, Vancouver, ISO, and other styles

35

HARVEY, NATE, and YUVAL PERES. "An invariant of finitary codes with finite expected square root coding length." Ergodic Theory and Dynamical Systems 31, no. 1 (2010): 77–90. http://dx.doi.org/10.1017/s014338570900090x.

Full text

Abstract:

AbstractLet p and q be probability vectors with the same entropy h. Denote by B(p) the Bernoulli shift indexed by ℤ with marginal distribution p. Suppose that φ is a measure-preserving homomorphism from B(p) to B(q). We prove that if the coding length of φ has a finite 1/2 moment, then σ2p=σ2q, where σ2p=∑ ipi(−log pi−h)2 is the informational variance of p. In this result, the 1/2 moment cannot be replaced by a lower moment. On the other hand, for any θ<1, we exhibit probability vectors p and q that are not permutations of each other, such that there exists a finitary isomorphism Φ from B(p

APA, Harvard, Vancouver, ISO, and other styles

36

Yang, Jun, Zihao Liu, Chen Li, Ying Wu, and Gang Ke. "Inverse halftoning based on sparse representation with boosted dictionary." Computer Science and Information Systems, no. 00 (2023): 22. http://dx.doi.org/10.2298/csis220808022y.

Full text

Abstract:

Halftone image is widely used in printing and scanning equipment. It is significant for the halftone image to be preserved and processed. For the different resolution of the display devices, the processing and displaying of halftone image are faced with great challenges, such as Moore pattern and image blur ring. The inverse halftone technique is required to remove the halftone screen. In this paper, we propose an inverse halftone algorithm based on sparse representation with the dictionary learned by two steps: deconvolution and sparse optimization in the transform domain to remove the noise.

APA, Harvard, Vancouver, ISO, and other styles

37

Nguyen, Hai, Jonathan Wittmer, and Tan Bui-Thanh. "DIAS: A Data-Informed Active Subspace Regularization Framework for Inverse Problems." Computation 10, no. 3 (2022): 38. http://dx.doi.org/10.3390/computation10030038.

Full text

Abstract:

This paper presents a regularization framework that aims to improve the fidelity of Tikhonov inverse solutions. At the heart of the framework is the data-informed regularization idea that only data-uninformed parameters need to be regularized, while the data-informed parameters, on which data and forward model are integrated, should remain untouched. We propose to employ the active subspace method to determine the data-informativeness of a parameter. The resulting framework is thus called a data-informed (DI) active subspace (DIAS) regularization. Four proposed DIAS variants are rigorously ana

APA, Harvard, Vancouver, ISO, and other styles

38

Yadav, V., and A. M. Michalak. "Improving computational efficiency in large linear inverse problems: an example from carbon dioxide flux estimation." Geoscientific Model Development 6, no. 3 (2013): 583–90. http://dx.doi.org/10.5194/gmd-6-583-2013.

Full text

Abstract:

Abstract. Addressing a variety of questions within Earth science disciplines entails the inference of the spatiotemporal distribution of parameters of interest based on observations of related quantities. Such estimation problems often represent inverse problems that are formulated as linear optimization problems. Computational limitations arise when the number of observations and/or the size of the discretized state space becomes large, especially if the inverse problem is formulated in a probabilistic framework and therefore aims to assess the uncertainty associated with the estimates. This

APA, Harvard, Vancouver, ISO, and other styles

39

Long, Kevin, Paul T. Boggs, and Bart G. van Bloemen Waanders. "Sundance: High-Level Software for PDE-Constrained Optimization." Scientific Programming 20, no. 3 (2012): 293–310. http://dx.doi.org/10.1155/2012/380908.

Full text

Abstract:

Sundance is a package in the Trilinos suite designed to provide high-level components for the development of high-performance PDE simulators with built-in capabilities for PDE-constrained optimization. We review the implications of PDE-constrained optimization on simulator design requirements, then survey the architecture of the Sundance problem specification components. These components allow immediate extension of a forward simulator for use in an optimization context. We show examples of the use of these components to develop full-space and reduced-space codes for linear and nonlinear PDE-c

APA, Harvard, Vancouver, ISO, and other styles

40

Scruby, T. R., and D. E. Browne. "A Hierarchy of Anyon Models Realised by Twists in Stacked Surface Codes." Quantum 4 (April 6, 2020): 251. http://dx.doi.org/10.22331/q-2020-04-06-251.

Full text

Abstract:

Braiding defects in topological stabiliser codes can be used to fault-tolerantly implement logical operations. Twists are defects corresponding to the end-points of domain walls and are associated with symmetries of the anyon model of the code. We consider twists in multiple copies of the 2d surface code and identify necessary and sufficient conditions for considering these twists as anyons: namely that they must be self-inverse and that all charges which can be localised by the twist must be invariant under its associated symmetry. If both of these conditions are satisfied the twist and its s

APA, Harvard, Vancouver, ISO, and other styles

41

Ozelim, Luan C. S. M., Ugo S. Dias та Pushpa N. Rathie. "Revisiting the Lognormal Modelling of Shadowing Effects during Wireless Communications by Means of the α-μ/α-μ Composite Distribution". Modelling 2, № 2 (2021): 197–209. http://dx.doi.org/10.3390/modelling2020010.

Full text

Abstract:

Properly modeling the shadowing effects during wireless transmissions is crucial to perform the network quality assessment. From a mathematical point of view, using composite distributions allows one to combine both fast fading and slow fading stochastic phenomena. Numerous statistical distributions have been used to account for the fast fading effects. On the other hand, even though several studies indicate the adequacy of the Lognormal distributon (LNd) as a shadowing model, they also reveal this distribution renders some analytic tractability issues. Past works include the combination of Ra

APA, Harvard, Vancouver, ISO, and other styles

42

Segall, A. E. "The Search for a Generalized Analytical Solution for the Inverse Problem; Some Surprisingly Simple Approximate Methods for Problems of Practical Importance." Journal of Physics: Conference Series 2444, no. 1 (2023): 012013. http://dx.doi.org/10.1088/1742-6596/2444/1/012013.

Full text

Abstract:

Abstract Advances in numerical algorithms for Inverse problems has led to significant leaps in our ability to model complex situations of importance. Nonetheless, there is still a strong need for analytical approaches that can be used to calibrate/validate numerical simulations since the old adage of Trust, but Verify is sound advice. Moreover, access to Inverse codes is often limited despite a strong need. Fortunately, generalized Inverse formulations capable of good approximations can be obtained for linear problems by using a known Direct solution. Duhamel’s Integral (convolution) and a sys

APA, Harvard, Vancouver, ISO, and other styles

43

Ali, Shahid, Muhammad Farooq, Zhou Xiaohong, Martina Hedvicakova, and Ghulam Murtaza. "Board characteristics, institutional ownership, and investment efficiency: Evidence from an emerging market." PLOS ONE 19, no. 2 (2024): e0291309. http://dx.doi.org/10.1371/journal.pone.0291309.

Full text

Abstract:

This study investigates the impact of board governance mechanism on investment efficiency (IE) in PSX-listed firms. The study also examines the role of institutional ownership (IO) in board-IE relationships. In addition, we extend our analysis to re-examine this relationship by splitting the sample into two groups, i.e., the introductory phase of corporate governance (CG) i.e., 2004 to 2013, and revised codes of CG (2014 to 2018) to examine the impact of these separately on IE. The sample data comprises 155 non-financial PSX-listed firms from 2004 to 2018. IE is measured using firms’ growth op

APA, Harvard, Vancouver, ISO, and other styles

44

Wu, Xu, Ziyu Xie, Farah Alsafadi, and Tomasz Kozlowski. "A comprehensive survey of inverse uncertainty quantification of physical model parameters in nuclear system thermal–hydraulics codes." Nuclear Engineering and Design 384 (December 2021): 111460. http://dx.doi.org/10.1016/j.nucengdes.2021.111460.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Jain, P., and M. D. Flannigan. "Comparison of methods for spatial interpolation of fire weather in Alberta, Canada." Canadian Journal of Forest Research 47, no. 12 (2017): 1646–58. http://dx.doi.org/10.1139/cjfr-2017-0101.

Full text

Abstract:

Spatial interpolation of fire weather variables from station data allow fire danger indices to be mapped continuously across the landscape. This information is crucial to fire management agencies, particularly in areas where weather data are sparse. We compare the performance of several standard interpolation methods (inverse distance weighting, spline, and geostatistical interpolation methods) for estimating output from the Canadian Fire Weather Index (FWI) system at unmonitored locations. We find that geostatistical methods (kriging) generally outperform the other methods, particularly when

APA, Harvard, Vancouver, ISO, and other styles

46

Haney, Matthew M., and Victor C. Tsai. "Perturbational and nonperturbational inversion of Rayleigh-wave velocities." GEOPHYSICS 82, no. 3 (2017): F15—F28. http://dx.doi.org/10.1190/geo2016-0397.1.

Full text

Abstract:

The inversion of Rayleigh-wave dispersion curves is a classic geophysical inverse problem. We have developed a set of MATLAB codes that performs forward modeling and inversion of Rayleigh-wave phase or group velocity measurements. We describe two different methods of inversion: a perturbational method based on finite elements and a nonperturbational method based on the recently developed Dix-type relation for Rayleigh waves. In practice, the nonperturbational method can be used to provide a good starting model that can be iteratively improved with the perturbational method. Although the pertur

APA, Harvard, Vancouver, ISO, and other styles

47

Joutsijoki, Henry, Markus Haponen, Jyrki Rasku, Katriina Aalto-Setälä, and Martti Juhola. "Error-Correcting Output Codes in Classification of Human Induced Pluripotent Stem Cell Colony Images." BioMed Research International 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/3025057.

Full text

Abstract:

The purpose of this paper is to examine how well the human induced pluripotent stem cell (hiPSC) colony images can be classified using error-correcting output codes (ECOC). Our image dataset includes hiPSC colony images from three classes (bad, semigood, and good) which makes our classification task a multiclass problem. ECOC is a general framework to model multiclass classification problems. We focus on four different coding designs of ECOC and apply to each one of themk-Nearest Neighbor (k-NN) searching, naïve Bayes, classification tree, and discriminant analysis variants classifiers. We use

APA, Harvard, Vancouver, ISO, and other styles

48

Pavlov, A. A., Yu A. Romanenko, I. I. Korneev, et al. "CHOICE OF CODE FOR DETECTING ERRORS IN BACKUP CHANNELS OF A DUPLICATED COMPUTER." Vestnik komp'iuternykh i informatsionnykh tekhnologii, no. 236 (February 2024): 46–54. http://dx.doi.org/10.14489/vkit.2024.02.pp.046-054.

Full text

Abstract:

An analysis of operation and selection of reliability indicators for specialized computers (SEVMs) of aerospace equipment was carried out. The requirements for the methods of redundant computer systems are formulated. A comparative evaluation of the detecting ability and hardware costs in the implementation of the majority method of redundancy, the method of duplication and the use of corrective codes is carried out. The expediency of using the duplication method to increase the probability of failure-free operation and survivability of self-healing digital computers, using algebraic linear co

APA, Harvard, Vancouver, ISO, and other styles

49

Hocevar, Erwin, and Walter G. Kropatsch. "Inventing the Formula of the Trees: A Solution of the Representation of Self Similar Objects." Fractals 05, supp01 (1997): 51–64. http://dx.doi.org/10.1142/s0218348x97000632.

Full text

Abstract:

Iterated Function Systems (IFS) seem to be used best to represent objects in the nature, because many of them are self similar. An IFS is a set of affine and contractive transformations. The union (so-called collage) of the subimages generated by transforming the whole image produces the image again - the self similar attractor of these transformations, which can be described by a binary image. For a fast and compact representation of those images, it would be desirable to calculate the transformations (the IFS-Codes) directly from the image that means to solve the inverse IFS-Problem. The sol

APA, Harvard, Vancouver, ISO, and other styles

50

Landkammer, Philipp, and Paul Steinmann. "Application of a Non-Invasive Form Finding Algorithm to the Ring Compression Test with Varying Friction Coefficients." Key Engineering Materials 651-653 (July 2015): 1381–86. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.1381.

Full text

Abstract:

It is a great challenge in the development of functional components to determine the optimal blank design (material configuration) of a workpiece according to a specific forming process, while knowing the desired target geometry (spatial configuration). A new iterative non-invasive algorithm, which is purely based on geometrical considerations, is developed to solve inverse form finding problems. The update-step is performed by mapping the nodal spatial difference vector, between the computed spatial coordinates and the desired spatial target coordinates, with a smoothed deformation gradient t

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!