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COOPERATIVE DYNAMICS OF LOYAL CUSTOMERS IN QUEUEING NETWORKS

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Journal of Systems Science and Systems Engineering 2008年第2期17卷 241-254页

作者： Olivier GALLAY max-Olivier HONGLER STI-IPR-LPM Station 17BM 3.138Ecole Polytechnique Fédérale de Lausanne(EPFL)CH-1015 Lausanne STI-IPR-LPM Station 17BM 3.139Ecole Polytechnique Fédérale de Lausanne(EPFL)CH-1015 Lausanne

We consider queueing networks （QN＇s） with feedback loops roamed by ＂intelligent＂ agents, able to select their routing on the basis of their measured waiting times at the QN nodes. This is an idealized model to discuss the dynamics of customers who stay loyal to a service supplier, provided their service time remains below a critical threshold. For these QN＇s, we show that the traffic flows may exhibit collective patterns typically encountered in multi-agent systems. In simple network topologies, the emergent cooperative behaviors manifest themselves via stable macroscopic temporal oscillations, synchronization of the queue contents and stabilization by noise phenomena. For a wide range of control parameters, the underlying presence of the law of large numbers enables us to use deterministic evolution laws to analytically characterize the cooperative evolution of our multi-agent systems. In particular, we study the case where the servers are sporadically subject, to failures altering their ordinary behavior.

关键词： Queueing networks with feedback loops oscillations synchronization stabilization by noise loyal customers cooperation stable temporal

Electrochemical oxidation of polyethylene glycol in electroplating solution using paraffin composite copper hexacyanoferrate modified (PCCHM) anode

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Journal of Environmental Sciences 2004年第5期16卷 851-855页

作者： Rajesh S. Bejankiwar Abir Basu max Cementi Department of Civil and Environmental Engineering University of Windsor Windsor Ontario N9B 3P4 CanadaDepartment of Civil and Environmental Engineering University of Windsor Windsor Ontario N9B 3P4 CanadaDepartment of Civil and Environmental Engineering University of Windsor Windsor Ontario N9B 3P4 Canada

Electrochemical oxidation of polyethylene glycol(PEG) in an acidic(pH 0.18 to 0.42) and high ionic strength electroplating solution was investigated. The electroplating solution is a major source of wastewater in the printing wiring board industry. A paraffin composite copper hexacyanoferrate modified(PCCHM) electrode was used as the anode and a bare graphite electrode was used as the cathode. The changes in PEG and total organic carbon(TOC) concentrations during the course of the reaction were monitored. The efficiency of the PCCHM anode was compared with bare graphite anode and it was found that the former showed significant electrocatalytic property for PEG and TOC removal. Chlorides present in the solution were found to contribute significantly in the overall organic removal process. Short chain organic compounds like acetic acid, oxalic acid, formic acid and ethylene glycol formed during electrolysis were identified by HPLC method. Anode surface area and applied current density were found to influence the electro-oxidation process, in which the former was found to be dominating. Investigations of the kinetics for the present electrochemical reaction suggested that the two stage first-order kinetic model provides a much better representation of the overall mechanism of the process if compared to the generalized kinetic model.

关键词： polyethylene glycol(PEG) paraffin composite copper hexacyanoferrate modified(PCCHM) electrode electroplating solution two stage first-order kinetic model generalized kinetic model

Generative Adversarial Network Based Heuristics for Sampling-Based Path Planning

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IEEE/CAA Journal of Automatica Sinica 2022年第1期9卷 64-74页

作者： Tianyi Zhang Jiankun Wang max Q.-H.Meng Department of Electronic and Electrical Engineering Southern University of Science and TechnologyShenzhen 518055China

Sampling-based path planning is a popular methodology for robot path *** a uniform sampling strategy to explore the state space,a feasible path can be found without the complex geometric modeling of the configuration ***,the quality of the initial solution is not guaranteed,and the convergence speed to the optimal solution is *** this paper,we present a novel image-based path planning algorithm to overcome these ***,a generative adversarial network(GAN)is designed to take the environment map(denoted as RGB image)as the input without other preprocessing *** output is also an RGB image where the promising region(where a feasible path probably exists)is *** promising region is utilized as a heuristic to achieve non-uniform sampling for the path *** conduct a number of simulation experiments to validate the effectiveness of the proposed method,and the results demonstrate that our method performs much better in terms of the quality of the initial solution and the convergence speed to the optimal ***,apart from the environments similar to the training set,our method also works well on the environments which are very different from the training set.

关键词： Generative adversarial network(GAN) optimal path planning robot path planning sampling-based path planning

Advances in Studies and Applications of Centroidal Voronoi Tessellations

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Numerical Mathematics(Theory,Methods and Applications) 2010年第2期3卷 119-142页

作者： Qiang Du max Gunzburger Lili Ju Department of Mathematics Pennsylvania State University University Park PA16802 USA. Department of Scientific Computing Florida State University Tallahassee FL32306 USA. Department of Mathematics University of South Carolina Columbia SC29208USA.

Centroidal Voronoi tessellations(CVTs) have become a useful tool in many applications ranging from geometric modeling,image and data analysis,and numerical partial differential equations,to problems in physics,astrophysics,chemistry,and biology. In this paper,we briefly review the CVT concept and a few of its generalizations and well-known *** then present an overview of recent advances in both mathematical and computational studies and in practical applications of *** possible,we point out some outstanding issues that still need investigating.

关键词： Voronoi tessellations centroids clustering mesh generation and optimization imageprocessing model reduction point sampling.

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Inaugural editorial

Horticulture Research 2014年第1期1卷 281-282页

作者： Zong-Ming(max)Cheng Professor College ofHorticulture NanjingAgriculturalUniversityNanjingChina Department of Plant Sciences University of TennesseeKnoxvilleTNUSA

Horticulture is one of the oldest agricultural practices,dating back to the beginning of human civilization when humans collected naturally grown fruits,brought them to their settlements and purposely cultivated *** today plays crucial roles in our ***,nuts and vegetables are important foods that supplement staples like rice and corn and provide many essential *** trees,shrubs and flowers are essential for beautifying our living ***-cut flowers are associated with public congratulatory events like business openings and personal celebratory occasions like weddings,anniversaries and ***,herbs and specialty local fruits are inseparable parts of cultures and religious ***,horticulture is being used in combatting nutritional imbalance,obesity and mental health issues,providing educational materials for teaching biological sciences,remediating environmental disorders,and conserving biodiversity and environmental integrity.

关键词： flowers religious fruits

Erythropoietin enhanced recovery after peripheral nerve injury

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Neural Regeneration Research 2017年第8期12卷 1268-1269页

作者： max Modrak Leigh Sundem John Elfar University of Rochester School of Medicine and Dentistry RochesterNY USA Department of Orthopaedic Surgery and Rehabilitation University of Rochester Medical Center Rochester NY USA Department of Orthopedic Surgery and Center for OrthopedicResearch and Translational Science Pennsylvania State University College of Medicine Hershey PA USA

Peripheral nerve injuries are common disorders affecting the US population and represent a great economic and social *** injuries to peripheral nerves are most often due to an acute trauma or iatrogenic injury,with th... 详细信息

关键词： EPO Erythropoietin enhanced recovery after peripheral nerve injury

Unexpectedly large energy variations from dopant interactions in ferroelectric HfO_(2) from high-throughput ab initio calculations

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npj Computational Materials 2018年第1期4卷 45-53页

作者： max Falkowski Christopher Künneth Robin Materlik Alfred Kersch Munich University of Applied Sciences Lothstr.3480335 MunichGermany

Insight into the origin of process-related properties like small-scale inhomogeneities is key for material ***,we analyze DFT calculations of randomly doped HfO_(2) structures with Si,La,and VO and relate them to the kind of production *** energies of the relevant ferroelectric Pbc2_(1) phase are compared with the competing crystallographic phases under the influence of the arising local inhomogeneities in a coarse-grained *** interaction among dopants adds to the statistical effect from the random positioning of the *** anneals after atomic layer or chemical solution deposition processes,which are short compared to ceramic process tempering,the large energy variations remain because the dopants do not *** the energy difference is the criterion for the phase stability,the large variation suggests the possibility of nanoregions and diffuse phase transitions because these local doping effects may move the system over the paraelectric-ferroelectric phase boundary.

关键词： ferroelectric dopant grain

Kinetic and product studies of the reactions of NO3 with a series of unsaturated organic compounds

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Journal of Environmental Sciences 2020年第9期32卷 111-120页

作者： Yangang Ren max McGillen Ibrahim Ouchen Veronique Daële Abdelwahid Mellouki Centre National de la Recherche Scientifique(CNRS)(UPR 3021) Observatoire des Sciences de l’Univers en région Centre(OSUC)Institut de CombustionAérothermiqueRéactivitéet Environnement(ICARE)Orléans 45071France Earth Sciences Department Scientific InstituteMohammed V UniversityRabat 10106Morocco Le Studium Loire Valley Institute for Advanced Studies Orléans 45071France

Rate coefficients for the reaction of N03 radicals with 6 unsaturated volatile organic compounds(VOCs) in a 7300 L simulation chamber at ambient temperature and pressure have been determined by the relative rate *** resulting rate coefficients were determined for isoprene,2-carene,3-carene,methyl vinyl ketone(MVK),methacrolein(MACR)and crotonaldehyde(CA),as(6.6±0.8)×10-13,(1.8±0.6)×10-11,(8.7±0.5)×10-12,(1.24±1.04)×10-16,(3.3±0.9)×10-15 and(5.7±1.2)×10-15 cm3/(molecule·sec),*** experiments indicate that NO3 radical reactions with all the studied unsaturated VOGs proceed through addition to the olefinic bond,however,it indicates that the introduction of a carbonyl group into unsaturated VOGs can deactivate the neighboring olefinic bond towards reaction with the NO3 radical,which is to be expected since the presence of these electronwithdrawing substituents will reduce the electron density in the π orbitals of the alkenes,and will therefore reduce the rate coefficient of these electrophilic addition *** addition,we investigated the product formation from the reactions of 2-carene and 3-carene with the NO3 *** identification of an epoxide(C10H16OH+),caronaldehyde(C10H16O2 H+) and nitrooxy-ketone(C10H16O4 NH+) was achieved using a proton transfer reaction time-of-flight mass spectrometer(PTR-TOF-MS) and a reaction mechanism is proposed.

关键词： Rate coefficient NO_(3) radical Products Volatile organic compounds(VOCs)

A generalized mathematical model for non-catalytic gas-solid reactions

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Chinese Journal of Chemistry 2000年第4期18卷 526-532页

作者：阎子峰逯杰清 LU max G.Q. State Key Laboratory for Heavy Oil Processing University of Petroleum Dongying Shandong 257062 China Department of Mathematics Dongying University of Union Dongying Shandong 257021 China Department of Chemical Engineering University of Queensland Australia

Based on a general classification and characteristic comparison of the existing models, a new model for non-catalytic gas-solid reactions is proposed and a general formulation for the model in terms of the solid conversion, X, is presented in mis paper. The model, referred to the generalized model, is demonstrated to be applicable to any solid reactant of general structure ranging from highly porous to nonporous materials. It is shown that the generalized model incorporates the grain and pore structure for a solid pellet and can be reduced to the grain and random pore models as extreme cases.

关键词： Non-catalytic conversion gas-solid reactions mathematical model structure of solid reactants