检索结果-南通市图书馆

A Class of Path-Following Interior-Point Methods for P_(∗)(κ)-Horizontal Linear Complementarity Problems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2015年第1期3卷 17-30页

作者： Soodabeh Asadi hossein mansouri Maryam Zangiabadi Department of Applied Mathematics Faculty of Mathematical SciencesShahrekord UniversityShahrekordIran

In this paper,a class of polynomial interior-point algorithms for P_(∗)(κ)-horizontal linear complementarity problems based on a newparametric kernel function is *** new parametric kernel function is used both for determining the search directions and for measuring the distance between the given iterate and theμ-center of the *** derive the complexity analysis for the algorithm,both with large and small updates.

关键词： Horizontal linear complementarity problem Interior-point method Central path Polynomial complexity Kernel function

A Path-Following Full Newton-Step Infeasible Interior-Point Algorithm for P∗(κ)-HLCPs Based on a Kernel Function

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2016年第1期4卷 77-96页

作者： Soodabeh Asadi hossein mansouri Maryam Zangiabadi Department of Applied Mathematics Faculty of Mathematical SciencesShahrekord UniversityP.O.Box 115ShahrekordIran

In this paper,we present a path-following infeasible interior-point method for P∗(κ)horizontal linear complementarity problems(P∗(κ)-HLCPs).The algorithm is based on a simple kernel function for finding the search directions and defining the neighborhood of the central *** algorithm follows the central path related to some perturbations of the original problem,using the so-called feasibility and centering steps,along with only full such ***,it has the advantage that the calculation of the step sizes at each iteration is *** complexity result shows that the full-Newton step infeasible interior-point algorithm based on the simple kernel function enjoys the best-known iteration complexity for P∗(κ)-HLCPs.

关键词： Horizontal linear complementarity problem Infeasible interior-point method Central path Kernel function

A Wide-Neighborhood Predictor-Corrector Interior-Point Algorithm for Linear Complementarity Problems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2018年第4期6卷 529-543页

作者： Mohammad Pirhaji hossein mansouri Maryam Zangiabadi Department of Applied Mathematics Faculty of Mathematical SciencesShahrekord UniversityShahrekordIran

In this paper,a wide-neighborhood predictor-corrector feasible interiorpoint algorithm for linear complementarity problems is *** algorithm is based on using the classical affine scaling direction as a part in a corrector step,not in a predictor *** convergence analysis of the algorithm is shown,and it is proved that the algorithm has the polynomial complexity O(√n logε^(−1))which coincides with the best known iteration bound for this class of mathematical *** numerical results indicate the efficiency of the algorithm.

关键词： Linear complementarity problems Predictor-corrector algorithm Polynomial complexity

A Wide Neighborhood Interior-Point Method for Cartesian P_(∗)(κ)-LCP over Symmetric Cones

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2015年第3期3卷 331-345页

作者： Marzieh Sayadi Shahraki hossein mansouri Maryam Zangiabadi Department of Applied Mathematics Faculty of Mathematical SciencesShahrekord UniversityP.O.Box 115ShahrekordIran

this paper,we propose an infeasible-interior-point method,based on a new wide neighborhood of the central path,for linear complementarity problems over symmetric cones with the Cartesian P_(∗)(κ)-*** convergence is shown for commutative class of search ***,we analyze the algorithm and obtain the complexity bounds,which coincide with the best-known results for the Cartesian P_(∗)(κ)-*** numerical tests are reported to illustrate our theoretical results.

关键词： Infeasible-interior-point method Symmetric cone optimization P_(∗)(κ)-property Wide neighborhood

CSRWA:Covert and Severe Attacks Resistant Watermarking Algorithm

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 1027-1047页

作者： Balsam Dhyia Majeed Amir hossein Taherinia Hadi Sadoghi Yazdi Ahad Harati Faculty of Engineering Ferdowsi University of MashhadMashhad***Iran Department of Computer Techniques Engineering Imam Al-Kadhum CollegeBaghdad10087Iraq

Watermarking is embedding visible or invisible data within media to verify its authenticity or protect *** watermark is embedded in significant spatial or frequency features of the media to make it more resistant to intentional or unintentional *** of these features are important perceptual features according to the human visual system(HVS),which means that the embedded watermark should be imperceptible in these ***,both the designers of watermarking algorithms and potential attackers must consider these perceptual features when carrying out their *** two roles will be considered in this paper when designing a robust watermarking algorithm against the most harmful attacks,like volumetric scaling,histogram equalization,and non-conventional watermarking attacks like the Denoising Convolution Neural Network(DnCNN),which must be considered in watermarking algorithm design due to its rising role in the state-of-the-art *** DnCNN is initialized and trained using watermarked image samples created by our proposed Covert and Severe Attacks Resistant Watermarking Algorithm(CSRWA)to prove its *** this algorithm to satisfy the robustness and imperceptibility tradeoff,implementing the Dither Modulation(DM)algorithm is boosted by utilizing the Just Noticeable Distortion(JND)principle to get an improved performance in this ***,luminance,inter and intra-block contrast are used to adjust the JND values.

关键词： Covert attack digital watermarking DnCNN JND perceptual model robustness

Discrete time multiple spacecraft formation flying attitude optimal control in presence of relative state constraints

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2021年第4期34卷 293-305页

作者： hossein MORADI PARI hossein BOLANDI Department of Electrical Engineering Iran University of Science and TechnologyTehran 009821Iran

This paper addresses the challenge of synchronized multiple spacecraft attitude reorientation in presence of pointing and boundary constraints with limited inter-spacecraft communication *** attitude pointing constraint among the fleet of spacecraft has also been modeled and considered during the attitude maneuvers toward the desired *** fling control structure that consists of decentralized path planners based on virtual structure approach joint with discrete time optimal local controller is designed to achieve the mission's *** to digital computing of spacecraft's onboard computer,local optimal controller based on discrete time prediction and correction algorithm has been *** time step of local optimal algorithm execution is designed so that the spacecraft track their desired attitudes with appropriate error *** convergence of the proposed architecture and stability of local controller's tracking error within appropriate upper bound are ***,a numerical simulation of a stereo imaging scenario is presented to verify the performance of the proposed architecture and the effectiveness of the algorithm.

关键词： Decentralized Discrete time Formation flying Optimal control Spacecraft Virtual structure approach

Effect of different treatments on electrokinetic remediation of Zn, Pb and Cd from a contaminated calcareous soil

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2021年第10期34卷 255-265页

作者： hossein Beyrami National Salinity Research Center Agricultural ResearchEducation and Extension OrganizationYazdIran

Electrokinetic remediation is a promising method to decontamination of the heavy metals from *** this paper,the remediation of a contaminated calcareous soil with Zn,Cd and Pb sampled from around Zanjan province of Iran,was investigated using electrokinetic *** this paper,the soil contain a high concentration of Zn(1400 mg·kg^(-1)),Cd(15 mg·kg^(-1))and Pb(250 mg·kg^(-1)).Electrokinetic decontamination consists of two series of experiments as follows:(1)the effect of five treatments including the use of distilled water,acetic acid and EDTA electrolyte solutions,and approaching anodes systems,and the circulation flow of electrolyte at two different voltage gradient(i.e.1.33 and 2.66 V·cm^(-1)),and(2)the effect of moisture content(saturated,FC and 0.7 FC,FC indicated soil moisture at "Field Capacity")with a voltage gradient of 1.33 V·cm^(-1).After applying electric current for 5 days,the results of experiments indicated that the removal efficiency of heavy metals can be increased by raising the voltage *** this matter,the highest remediation can be observed among different treatments in EDTA(Ethylene diamine tetra acetic acid)treatment(40.11%,43.10%and 24.7%for Zn,Cd and Pb,respectively).Moreover,the heavy metals removal at the saturated moisture was at the highest level so that 32.62%cadmium,31.33%zinc and 18.82%lead being removed after 120 h of electric current *** decreasing moisture to 0.7 FC,the removal percentage for the three heavy metals obtained 20.97%,18.44%and 12.25%,***,Cd had the highest removal,and Zn and Pb were next among the three heavy metals in question.

关键词： Decontamination Soil moisture Voltage gradient Cadmium Lead Zinc

Effects of Location,Size and Number of Wind Turbine Receptors on Blade Lightning Protection

在线全文

学校读者我要写书评

暂无评论

电力系统自动化 2012年第8期36卷 122-127页

作者： hossein Kazemi KAREGAR hossein BAGHERIAN Faculty of Electrical &Computer Engineering Shahid Beheshti University

Electric and magnetic fields generated by lightning cause a serious hazard to various *** wind turbine installations with higher power capacity are *** power capacity requires higher height and so there is more probability of lightning *** are the most probable components to be struck by *** most common lightning protection system for the blades consists of several metallic receptors on the blade *** are connected to the ground by metallic down-conductors placed inside the blade *** paper studies effects of the receptor configurations on protecting the blade against lightning *** this purpose,an analysis procedure based on finite element method(FEM)in COMSOL Multiphysics software environment is *** voltage distribution around the blade is simulated for various configurations of *** best configuration is *** are performed on the blade model of a special wind turbine,which isVESTAS V47".

关键词：风力发电机组受体刀片防雷叶片表面位置最佳配置发电能力

REMOVAL OF MERCURY FROM WATER USING POLYPYRROLE AND ITS COMPOSITES

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2007年第4期25卷 393-397页

作者： hossein Eisazadeh Faculty of Chemical Engineering University of MazandaranP.O.Box 484BabolIran

One of the suitable methods for removing heavy metals from water is by using surface adsorption process. In this paper, the preparation of polypyrrole and its composites as adsorbents are discussed and the capability of separating mercury from water is investigated. The results indicated that the polypyrrole and its composites are able to remove mercury from aqueous media. Furthermore the adsorption percentage is related to the surface morphology, type of additives and its concentration.

关键词： Polypyrrole and its composites Mercury removal Additives Surface morphology.