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Rendering algorithms for aberrated human vision simulation

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Visual Computing for Industry,Biomedicine,and Art 2023年第1期6卷 51-75页

作者： István Csoba Roland Kunkli Faculty of informatics University of DebrecenDebrecen 4028Hungary doctoral school of informatics University of DebrecenDebrecen 4028Hungary

Vision-simulated imagery―the process of generating images that mimic the human visual system―is a valuable tool with a wide spectrum of possible applications, including visual acuity measurements, personalized planning of corrective lenses and surgeries, vision-correcting displays, vision-related hardware development, and extended reality discomfort reduction. A critical property of human vision is that it is imperfect because of the highly influential wavefront aberrations that vary from person to person. This study provides an overview of the existing computational image generation techniques that properly simulate human vision in the presence of wavefront aberrations. These algorithms typically apply ray tracing with a detailed description of the simulated eye or utilize the point-spread func-tion of the eye to perform convolution on the input image. Based on the description of the vision simulation tech-niques, several of their characteristic features have been evaluated and some potential application areas and research directions have been outlined.

关键词： Human vision Human visual system Vision simulation Wavefront aberrations Visual aberrations Vision-realistic rendering

Efficient object location determination and error analysis based on barycentric coordinates

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Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 195-201页

作者： Andrea Bodonyi Roland Kunkli Faculty of informatics University of DebrecenDebrecen H-4028Hungary doctoral school of informatics University of DebrecenDebrecen H-4028Hungary

In this paper,we propose an efficient computational method for converting local coordinates to world coordinates using specially structured coordinate *** problem in question is the computation of world coordinates of an object throughout a motion,assuming that we only know the changing coordinates of some fixed surrounding reference points in the local coordinate system of the *** proposed method is based on barycentric coordinates;by taking the aforementioned static positions as the vertices of a polyhedron,we can specify the coordinates of the object in each step with the help of barycentric *** approach can significantly help us to achieve more accurate results than by using other possible *** the paper,we describe the problem and barycentric coordinate-based solution in *** then compare the barycentric method with a technique based on transformation matrices,which we also tested for solving our *** also present various diagrams that demonstrate the efficiency of our proposed approach in terms of precision and performance.

关键词： Barycentric coordinates Conversion Transformation Coordinate systems Location

TESTING k-EDGE-CONNECTIVITY OF DIGRAPHS

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Journal of Systems Science & Complexity 2010年第1期23卷 91-101页

作者： Yuichi YOSHIDA.HiroI TO school of informatics Kyoto University

This paper presents an algorithm that tests whether a given degree-bounded digraph is k-edge-connected or E-far from k-edge-connectivity. This is the first testing algorithm for k-edge- connectivity of digraphs whose running time is independent of the number of vertices and edges. A digraph of n vertices with degree bound d is ε-far from k-edge-connectivity if at least εdn edges have to be added or deleted to make the digraph k-edge-connected, preserving the degree bound. Given a constant error parameter ε and a degree bound d, our algorithm always accepts all k-edge-connected digraphs and reiects all digraphs that is ε-far from k-edge-connectivity with orobabilitv at least 2/*** runs in O（d（εd^-c）^k logεd^-1O）（c〉1 is a constant）time when input digraphs are restricted to be （k-1）-edge connected and runs in O（d（εd^-ck）^klogεd^-kO）（c〉1 is a constant）time for general digraphs.

关键词： Digraph graph k-edge-connectivity property testing.

BAYESIAN IMAGE SUPERRESOLUTION AND HIDDEN VARIABLE MODELING

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Journal of Systems Science & Complexity 2010年第1期23卷 116-136页

作者： Atsunori KANEMURA Shin-ichi MAEDA Wataru FUKUDA ShinI SHII Graduate school of informatics Kyoto University

Superresolution is an image processing technique that estimates an original high-resolutionimage from its low-resolution and degraded *** superresolution tasks,there have beenproblems regarding the computational cost for the estimation of high-dimensional *** are now being overcome by the recent development of fast computers and the developmentof powerful computational techniques such as variational Bayesian *** paper reviewsa Bayesian treatment of the superresolution problem and presents its extensions based on hierarchicalmodeling by employing hidden variables.

关键词： Bayesian estimation hidden variables image superresolution Markov random fields variational estimation.

Traditional Chinese medicine in the treatment of Helicobacter pylorirelated gastritis:The mechanisms of signalling pathway regulations

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World Journal of Gastroenterology 2025年第3期31卷 11-28页

作者： Pei-Pei Zhang Liang Li Hao-Yu Qu Guang-Yu Chen Meng-Zhou Xie Yan-Kun Chen school of Traditional Chinese Medicine Hunan University of Chinese MedicineChangsha 410200Hunan ProvinceChina Hunan Engineering Technology Research Center for Medicinal and Functional Food Hunan University of Chinese MedicineChangsha 410200Hunan ProvinceChina Key Laboratory of Traditional Chinese Medicine Heart and Lung Syndrome Differentiation and Medicated Diet and Dietotherapy Hunan University of Chinese MedicineChangsha 410200Hunan ProvinceChina school of informatics Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina Precision Medicine Research and Development Center Zhuhai Institute of Advanced TechnologyChinese Academy of SciencesZhuhai 519000Guangdong ProvinceChina

Helicobacter pylori-associated gastritis(HPAG)is a common condition of the gastrointestinal ***,extensive and long-term antibiotic use has resulted in numerous adverse effects,including increased resistance,gastrointestinal dysfunction,and increased recurrence *** these concerns develop,traditional Chinese medicine(TCM)may have *** is based on the concept of completeness and aims to eliminate pathogens and strengthen the *** has the potential to prevent this condition while also boosting the rate of Helicobacter pylori *** review elaborates on the mechanism of TCM treatment for HPAG based on cellular signalling pathways,which reflects the flexibility of TCM in treating diseases and the advantages of multi-level,multipathway,and multi-target treatments for HPAG.

关键词： Helicobacter pylori Helicobacter pylori-associated gastritis Traditional Chinese medicine Signalling pathway Eliminate pathogens Strengthen the body

A novel mixed-synchronization phenomenon in coupled Chua's circuits via non-fragile linear control

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Chinese Physics B 2011年第8期20卷 113-119页

作者：王军威马庆华曾丽 Cisco school of informatics Guangdong University of Foreign Studies

Dynamical variables of coupled nonlinear oscillators can exhibit different synchronization patterns depending on the designed coupling scheme. In this paper, a non-fragile linear feedback control strategy with multiplicative controller gain uncertainties is proposed for realizing the mixed-synchronization of Chua＇s circuits connected in a drive-response configuration. In particular, in the mixed-synchronization regime, different state variables of the response system can evolve into complete synchronization, anti-synchronization and even amplitude death simultaneously with the drive variables for an appropriate choice of scaling matrix. Using Lyapunov stability theory, we derive some sufficient criteria for achieving global mixed-synchronization. It is shown that the desired non-fragile state feedback controller can be constructed by solving a set of linear matrix inequalities （LMIs）. Numerical simulations are also provided to demonstrate the effectiveness of the proposed control approach.

关键词： mix-synchronization Chua's circuit non-fragile control Lyapunov stability linear ma-trix inequality

Structures and electronic properties of Mo_(2n)N_n(n=1-5):a density functional study

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Chinese Physics B 2010年第12期19卷 212-222页

作者：陈杭雷雪玲刘立仁刘志锋祝恒江 school of Mathematics Physics and InformaticsXinjiang Normal University

The lowest-energy structures and the electronic properties of Mo2nNn （n=1-5） clusters have been studied by using the density functional theory （DFT） simulating package DMol3 in the generalized gradient approximation （GGA）. The resulting equilibrium geometries show that the lowest-energy structures are dominated by central cores which correspond to the ground states of Mon （n = 2, 4, 6, 8, 10） clusters and nitrogen atoms which surround these cores. The average binding energy, the adiabatic electron affinity （AEA）, the vertical electron affinity （VEA）, the adiabatic ionization potential （AIP） and the vertical ionization potential （VIP） of Mo2nNn （n=1-5） clusters have been estimated. The HOMO LUMO gaps reveal that the clusters have strong chemical activities. An analysis of Mulliken charge distribution shows that charge-transfer moves from Mo atoms to N atoms and increases with cluster size.

关键词： Mo2nNn clusters density functional theory equilibrium structures electronic properties

Applying Rational Envelope curves for skinning purposes

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Frontiers of Information Technology & Electronic Engineering 2021年第2期22卷 202-209页

作者： Kinga KRUPPA Faculty of informatics University of DebrecenDebrecen H-4028Hungary doctoral school of informatics University of DebrecenDebrecen H-4028Hungary

Special curves in the Minkowski space such as Minkowski Pythagorean hodograph curves play an important role in computer-aided geometric design,and their usages are thoroughly studied in recent *** et al.(2016)introduced the class of Rational Envelope(RE)curves,and an interpolation method for G1 Hermite data was presented,where the resulting RE curve yielded a rational boundary for the represented *** now propose a new application area for RE curves:skinning of a discrete set of input *** show that if we do not choose the Hermite data correctly for interpolation,then the resulting RE curves are not suitable for *** introduce a novel approach so that the obtained envelope curves touch each circle at previously defined points of ***,we overcome those problematic scenarios in which the location of touching points would not be appropriate for skinning purposes.A significant advantage of our proposed method lies in the efficiency of trimming offsets of boundaries,which is highly beneficial in computer numerical control machining.

关键词： Medial axis transform Envelope Interpolation Skinning Circle

Optimal Restoration Scheduling of Damaged Networks Under Uncertain Environment by Using Improved Genetic Algorithm

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Tsinghua Science and Technology 2008年第S1期13卷 400-405页

作者： Hitoshi FURUTA Ken ISHIBASHI Koichiro NAKATSU Shun HOTTA Department of informatics Kansai University Graduate school of informatics Kansai University

The purpose of this research is to propose an early restoration for lifeline systems after earthquake disasters. The previous researches show that the optimization of the restoration schedule by using genetic algorithm (GA) is powerful. However, those are not considering the uncertain environment after earthquake disasters. The circumstances of the damage at devastated areas are very changeable due to the aftershock, fire disaster and bad weather. In addition, the restoring works may delay by unexpected accidents. Therefore, it is necessary to obtain the restoration schedule which has robustness, because the actual restoring works could not progress smoothly under the uncertain environment. GA considering uncertainty (GACU) can treat various uncertainties involved, but it is difficult to obtain the robust schedule. In this study, an attempt is made to develop a decision support system of the optimal restoration scheduling by using the improved GACU.

关键词： restoration schedule genetic algorithm uncertainty delay of schedule