Filters








306,938 Hits in 7.6 sec

On the Algorithmic Unsolvability of Some Stability Problems for Discrete Event Systems

Onur Toker
1996 IFAC Proceedings Volumes  
On the algorithmic unsolvability of some stability problems for discrete event systems. In  ...  If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement: www.tue.nl/taverne  ... 
doi:10.1016/s1474-6670(17)58436-0 fatcat:ny6s7urbuze4nceeewqjrizyae

A DIFFERENCE PERCEPTUAL HASHING ALGORITHM FOR MEDICAL VOLUME DATA AGAINST LOCAL NONLINEAR GEOMETRIC ATTACKS

Baoru Han
2020 International Journal of Innovative Research in Information Security  
In response to these problems, a new difference perceptual hashing algorithm for medical volume data is proposed in this paper.  ...  This has a huge impact on the protection, identification and authentication of three-dimensional medical volume data.  ...  The construction of the feature matrix of volume data is realized by performing three-dimensional discrete cosine transform and three-dimensional inverse discrete cosine transform on volume data.  ... 
doi:10.26562/ijiris.2020.v0707.002 fatcat:6h4a3btshbcn5hxdmlbantqnkq

A New Zero-Watermarking Algorithm Resisting Attacks Based on Differences Hashing

Baoru Han, Jingbing Li
2016 Cybernetics and Information Technologies  
The new zero-watermarking algorithm takes advantage of three-dimensional discrete wavelet transform multi-resolution analysis characteristics of space and time, threedimensional discrete cosine transform  ...  In order to enhance the medical information system security, and effectively solve the problem of medical volume data protection, a new zero-watermarking algorithm is proposed in the paper.  ...  Three-dimensional medical volume data could be processed by threedimensional discrete wavelet transform and three-dimensional discrete cosine transform; selecting some coefficients (4×5×4) of the transform  ... 
doi:10.1515/cait-2016-0026 fatcat:ywn3ibirjffthgsp6nyme3ufhu

A New Robust Zero-watermarking Algorithm for Medical Volume Data

Baoru Han, Jingbing Li, Liang Zong
2013 International Journal of Signal Processing, Image Processing and Pattern Recognition  
Aiming at medical image information security problem, this paper proposes a new robust zero-watermarking algorithm for medical volume data based on three-dimensional discrete wavelet transform, three-dimensional  ...  The algorithm integrates hermite chaotic neural network and zero-watermarking technology, which is not confined to artificially selected region of interest.  ...  Acknowledgements This work was supported by the National Natural Science Foundation of China (No: 61263033) and the Natural Science Foundation of Hainan Province (No: 613166).  ... 
doi:10.14257/ijsip.2013.6.6.23 fatcat:ffp3uf5mgnh6nhnkasfa2uzxfe

Zero-watermarking Algorithm for Medical Volume Data Based on Difference Hashing

Baoru Han, Jingbing Li, Yujia Li
2015 International Journal of Computers Communications & Control  
In order to protect the copyright of medical volume data, a new zerowatermarking algorithm for medical volume data is presented based on Legendre chaotic neural network and difference hashing in three-dimensional  ...  Secondly, it uses three-dimensional discrete cosine transform to the original medical volume data, and the perception of the low frequency coefficient invariance in the three-dimensional discrete cosine  ...  Based on the difference hashing algorithm, a difference hashing algorithm in three-dimensional discrete cosine transform domain is presents for medical volume Figure 2 : Three-dimensional discrete cosine  ... 
doi:10.15837/ijccc.2015.2.1752 fatcat:exueiczxi5cl3n75bkehxhabfu

Editorial Note: DAM Software Section

C.J Leonard
2004 Discrete Applied Mathematics  
of weighted MAX-SAT problems using GRASP Discrete Applied Mathematics, Volume 100, Issues 1-2, 15 March 2000, Pages 95-113 Mauricio G.C.  ...  Pardalos X-ref: 10.1016/S0166-218X(99)00171-7 Algorithms and codes for dense assignment problems: the state of the art Discrete Applied Mathematics, Volume 100, odd-hole inequalities to solve the index  ... 
doi:10.1016/s0166-218x(04)00158-1 fatcat:zulzix3sdjealmjrycg5vx7u3e

Comment on "Symplectic integration of magnetic systems": A proof that the Boris algorithm is not variational

C.L. Ellison, J.W. Burby, H. Qin
2015 Journal of Computational Physics  
be attributed to the volume-preserving properties of the algorithm.  ...  To resolve the discrepancy, this letter leverages a discrete Helmholtz condition to demonstrate that no variational formulation of the Boris algorithm exists, indicating that the long-term fidelity should  ...  A recent Journal of Computational Physics article [12] argued that the Boris algorithm is a variational integrator [13] and effectively equivalent to a symplectic integration of Hamilton's equations  ... 
doi:10.1016/j.jcp.2015.09.007 fatcat:2pfewusjqzhtfccnobspir7nvy

Nonlinear elliptic problems with the method of finite volumes

Sanjay Kumar Khattri
2006 Differential Equations and Nonlinear Mechanics  
We present a finite volume discretization of the nonlinear elliptic problems. The discretization results in a nonlinear algebraic system of equations.  ...  A Newton-Krylov algorithm is also presented for solving the system of nonlinear algebraic equations.  ...  For higher-order finite volume discretization of linear problems, the interested reader are referred to [1, 11] .  ... 
doi:10.1155/denm/2006/31797 fatcat:ijbwh5m45zhzrbshvmcan3pq4e

Author index Volume 13 (1986)

1986 Discrete Applied Mathematics  
Turzik, On an application of convexity to discrete systems (1) Poljak, S. and D. Turzik, On pre-periods of discrete influence systems (1) 0166-218X/86/$3.50 © 1986, Elsevier Science Publishers B.V.  ...  Hambrusch, An assignment algorithm with applications to integrated circuit layout (1) Barahona, F., A solvable case of quadratic 0-1 programming (1) Barros, O. and A.  ... 
doi:10.1016/0166-218x(86)90090-9 fatcat:xdfzxnoj6na6pffbwkmf7dbvpi

Author index to volume 151

2005 Discrete Applied Mathematics  
Rinaldi, An algorithm for the reconstruction of discrete sets from two projections in presence of absorption (1-3) 21-35 Batenburg, K.J., An evolutionary algorithm for discrete tomography (1-3) 36-54 Bertrand  ...  Nivat, Salient and reentrant points of discrete sets (1-3) 106-121 Debled-Rennesson, I., J.-L. Re´my and J. Rouyer-Degli, Linear segmentation of discrete curves into blurred segments  ... 
doi:10.1016/s0166-218x(05)00183-6 fatcat:ah6q3j4zqfeofphkthjw6srkkm

Zero-watermarking Algorithm for Medical Volume Data Based on Legendre Chaotic Neural Network and Perceptual Hashing

Baoru Han, Lisha Cai, Wenfeng Li
2015 International Journal of Grid and Distributed Computing  
The algorithm is based on three-dimensional discrete wavelet transform frequency analysis features, which uses perceptual hashing technique to extract medical volume data itself feature vector in order  ...  The algorithm achieves a combination of legendre chaotic neural network encryption and zerowatermarking technology, which can improve the medical volume data watermarking algorithm security and robustness  ...  Acknowledgement This work was supported the Natural Science Foundation of Hainan Province (No: 614241). Lisha Cai is corresponding author.  ... 
doi:10.14257/ijgdc.2015.8.1.19 fatcat:ipenmea5yjaldkzxq2emawnhwu

NEW ALGORITHMS FOR THE SPECIFIC ABSORPTION RATE NUMERICAL EVALUATION BASED ON SPHERICAL AVERAGING VOLUMES

Luca Catarinucci, Luciano Tarricone
2012 Progress in Electromagnetics Research B  
Nevertheless, SAR values are strongly influenced by many factors such as, for instance, the shape of the volume containing the reference mass, the spatial discretization step, or the treatment of internal  ...  Then, based on a spherical volume approach, some new algorithms are proposed.  ...  Many discretized versions of the cubes have been produced by varying the discretization step from 1 mm to 6 mm, so that the sensitivity of the different algorithms to the discretization step and to the  ... 
doi:10.2528/pierb12091502 fatcat:d6dayjehxngfpbynzttkpg2ivu

Image Registration with Guaranteed Displacement Regularity

Eldad Haber, Jan Modersitzki
2006 International Journal of Computer Vision  
As it turns out, the discretization of the volume constraint inequality is not straightforward.  ...  Therefore, we present a new type of discretization enabling the detection of twists in a pixel or a voxel.  ...  We therefore discretized the volume of every deformed box v, by the cross-product of the diagonals (cf. Figure 1 (a)) vol(v, ϕ) = ϕ(v) dy ≈ 1 2 (C − A) × (B − D).  ... 
doi:10.1007/s11263-006-8984-4 fatcat:xlzv62ztvff2jedhfvmf5po3r4

Page 304 of American Society of Civil Engineers. Collected Journals Vol. 121, Issue ST2 [page]

1995 American Society of Civil Engineers. Collected Journals  
Bendose and Mota Soares (1993) have edited applications of genetic algorithm in the topological design of structures. 304 JOURNAL OF STRUCTURAL ENGINEERING  ...  optimum optimum (1) (2) (3) (4) (5) (6) (7) Volume (cm*) 63,110 62,555 73,555 64,537 64,403 64,558 Number of continuous optimizer calls 1 1 l 100 86 88 Max g 0.001 0.100 0.300 0.001 0.004 0.001 Goldberg  ... 

Application of a new single staggered grid method to the heat-transfer problems

Xin Liang, Guan-Nan Liu
2019 Thermal Science  
The discretization of the basic equations for the fluid dynamics on the new single staggered grids is derived and the corresponding SIMPLE algorithm is introduced.  ...  The advantages of the new grid method are analyzed in comparison with the classical grid algorithms such as the staggered grids, collocated grids and semi-staggered grids.  ...  the corner node of main control volume, see fig. 1 (c) [15] .  ... 
doi:10.2298/tsci180612075l fatcat:rnlowalfbjebzhhsktnswyw7la
« Previous Showing results 1 — 15 out of 306,938 results