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Approximation of thermoelasticity contact problem with nonmonotone friction

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Applied Mathematics and Mechanics(English Edition) 2010年第1期31卷 77-86页

作者： Ivan EStAK Boko S. jovanovi Faculty of Mine and Geology University of Belgrade Faculty of Mathematics University of Belgrade

the paper presents the formulation and approximation of a static thermoelasticity problem that describes bilateral frictional contact between a deformable body and a rigid foundation. the friction is in the form of a nonmonotone and multivalued law. the coupling effect of the problem is neglected. therefore, the thermic part of the problem is considered independently on the elasticity problem. For the displacement vector, we formulate one substationary problem for a non-convex, locally Lipschitz continuous functional representing the total potential energy of the body. All problems formulated in the paper are approximated with the finite element method.

关键词： static thermoelastic contact nonmonotone multivalued friction hemivari-ational inequality substationary problem finite element approximation

Electricity tariff Aware Model Predictive Controller for Customer Battery Storage with Uncertain Daily Cycling Load

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Journal of Modern Power Systems and Clean Energy 2022年第1期10卷 140-148页

作者： Dejan P.jovanović Gerard F.Ledwich Geoffrey R.Walker Institute of Electrical and Electronic Engineers QueenslandAustralia School of Electrical Engineering and Robotics Queensland University of TechnologyBrisbaneAustralia

to optimally control the energy storage system of the battery exposed to the volatile daily cycling load and electricity tariffs,a novel modification of a conventional model predictive control is *** uncertainty of daily cycling load prompts the need to design a new cost function which is able to quantify the associated *** modelling a probabilistic dependence among flow,load,and electricity tariffs,the expected cost function is obtained and used in the constrained *** proposed control strategy explicitly incorporates the cycling nature of customer ***,for daily cycling load,a fixed-end time and a fixed-end output problem are *** is demonstrated that the proposed control strategy is a convex optimization *** stochastic and robust model predictive controllers evaluate the cost concerning model constraints and parameter ***,the expected cost across the flow variations is *** density function of load probability improves load prediction over a progressive prediction horizon,and a nonlinear battery model is utilized.

关键词： Residential energy systems battery storage model predictive control nonlinear optimization cost of daily electricity consumption

Model Predictive Control Strategy for Residential Battery Energy Storage System in Volatile Electricity Market with Uncertain Daily Cycling Load

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Journal of Modern Power Systems and Clean Energy 2023年第2期11卷 534-543页

作者： Dejan P.jovanović Gerard F.Ledwich Geoffrey R.Walker Institute of Electrical and Electronic Engineers QueenslandAustralia School of Electrical Engineering&Robotics Queensland University of TechnologyBrisbaneAustralia

this paper presents a control strategy for residential battery energy storage systems,which is aware of volatile electricity markets and uncertain daily cycling *** economic benefits of energy trading for prosumers are achieved through a novel modification of a conventional model predictive control(MPC).the proposed control strategy guarantees an optimal global solution for the applied control action.A new cost function is introduced to model the effects of volatility on customer benefits more ***,the newly presented cost function models a probabilistic relation between the power exchanged with the grid,the net load,and the electricity *** probabilistic calculation of the cost function shows the dependence on the mathematical expectation of market price and net *** techniques for calculating this value are *** proposed strategy differs from the stochastic and robust MPC in that the cost is calculated across the market price and net load variations rather than across model constraints and parameter variations.

关键词： Optimal control model predictive control(MPC) energy market nonlinear constrained optimization revenue for battery energy storage system Gaussian mixture model autoregressive integrated moving average model

Minimally invasive treatment of pancreatic pseudocysts

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World Journal of Gastroenterology 2015年第22期21卷 6850-6860页

作者： Enver Zerem Goran Hauser Svjetlana Loga-Zec Suad Kunosi Predrag jovanovi Dino Crnki Department of Gastroenterology University Clinical Center Tuzla Department of Medical Sciences The Academy of Sciences and Arts of Bosnia and Herzegovina Department of Internal Medicine Division of Gastroenterology Clinical Hospital Centre Rijeka Institute of Pharmacology Medical FacultyUniversity of Sarajevo Department of Physics Faculty of Natural Sciences and Mathematics University of Tuzla Faculty of Pharmacology University of Tuzla

A pancreatic pseudocyst(PPC) is typically a complication of acute and chronic pancreatitis, trauma or pancreatic duct obstruction. the diagnosis of PPC can be made if an acute fluid collection persists for 4 to 6 wk and is enveloped by a distinct *** PPCs regress spontaneously and require no treatment, whereas some may persist and progress until complications occur. the decision whether to treat a patient who has a PPC, as well as when and with what treatment modalities, is a difficult one. PPCs can be treated with a variety of methods: percutaneous catheter drainage(PCD), endoscopic transpapillary or transmural drainage, laparoscopic surgery, or open pseudocystoenterostomy. the recent trend in the management of symptomatic PPC has moved toward less invasive approaches such as endoscopic- and image-guided PCD. the endoscopic approach is suitable because most PPCs lie adjacent to the stomach. the major advantage of the endoscopic approach is that it creates a permanent pseudocysto-gastric track with no spillage of pancreatic enzymes. However, given the drainage problems, the monitoring, catheter manipulation and the analysis of cystic content are very difficult or impossible to perform endoscopically, unlike in the PCD approach. Several conditions must be met to achieve the complete obliteration of the cyst *** duct anatomy is an important factor in the prognosis of the treatment outcome, and the recovery of disrupted pancreatic ducts is the main prognostic factor for successful treatment of PPC, regardless of the treatment method used. In this article, we review and evaluate the minimally invasive approaches in the management of PPCs.

关键词： Complications Pseudocyst treatment Drainage Outcomes

Case of rectal angioleiomyoma in a female patient

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World Journal of Gastroenterology 2013年第13期19卷 2114-2117页

作者： Goran Z Stanojevi Dragan S Mihailovi Milica D Nestorovi milan D Radojkovi milan M jovanovi Miroslav P Stojanovi Branko B Brankovi General Surgery Clinic Ni Clinical CentreFaculty of MedicineUniversity of Ni18000 NiSerbia Institute of Pathology NiClinical CentreFaculty of MedicineUniversity of Ni18000 NiSerbia

Angioleiomyoma represents a benign stromal tumor, which usually occurs in the subcutaneous tissue of the extremities, although its occurrence in the gastrointestinal tract is very rare. A case of rectal angioleiomyoma in a 40 year-old female patient is described here. Six months earlier, the patient suffered from periodical prolapse of an oval tumor from the anus, along with difficulties in bowel movement. A transanal extirpation of the tumor was performed. this is the first reported case in the English literature of a patient presenting with prolapsed angioleiomyoma of the rectum. During the immediate postoperative period, as well as 6 mo later, the patient had an unremarkable postoperative recovery.

关键词： Prolapsed tumor Angioleiomyoma Rectum Leiomyoma

Hybrid Power Supply System with Fuzzy Logic Controller: Power Control Algorithm, Main Properties, and Applications

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Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 923-931页

作者： Dragana J.Petrović Miroslav M.Lazić Bojana V.jovanovićLazić Branko D.Blanuša Stanko O.Aleksić Department of Power Electronics Iritel a.d.BelgradeBelgradeSerbia Department of Power Electronics Faculty of Electrical Engineering University of Banja LukaBanja LukaSerbian

this paper presents a novel power supply system based on the use of fuzzy inference logic to improve the power control of renewable energy *** system comprises renewable solar and wind sources,and an accumulator battery is used as an additional power *** procedure for the parallel connection of multiple energy sources provides a stable power supply and optimal charging of the accumulative *** energy sources are connected in parallel using two serial converters and controlled by the controller based on the fuzzy *** reference voltage control of the serial converter enables an optimal use of available energy *** accumulative element is connected in parallel to compensate for the shortage of solar and wind energies,whereas if the available renewable energy exceeds the needs of the consumers,the surplus energy is accumulated in the *** measurements are conducted on the prototype of the hybrid power system under real conditions and compared with the applied systems of this *** novel system is mainly used in remote telecom locations where there is no power distribution network.

关键词： Fuzzy logic hybrid power source power supply parallel operation serial converter

A comparison of power measurement techniques and electrical characterization of an atmospheric pressure plasma jet

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Plasma Science and technology 2022年第10期24卷 74-85页

作者： Olivera jovanoviĆ Nevena PUAČ NikolaŠKORO Institute of Physics University of BelgradePregrevica 118Belgrade 11080Serbia

In the last two decades a growing interest has been shown in the investigation of atmospheric pressure plasma jets(APPJs)that operate in contact with liquid *** order to form a complete picture about such experimental systems,it is necessary to perform detailed diagnostics of plasma jets,as one step that will enable the adjustment of system properties for applications in different *** this work,we conducted a detailed electrical characterisation of a plasma system configuration used for water treatment.A helium plasma jet,with a pin electrode powered by a continuous sine wave at a frequency of 330 k Hz,formed a streamer that was in contact with a distilled water *** electrical circuit allowed the monitoring of electrical signals supplied to the jet and also to the plasma *** electrical characterisation together with power consumption measurements was obtained by using two different *** first method was based on the direct measurements of voltage and current signals,while in the second method we used'Lissajous figures'.We compared these two methods when used for discharge power estimation and addressed their advantages and *** results showed that both of these methods could be used to successfully determine power consumed by a discharge in contact with water,but only when taking into account power dissipation without plasma.

关键词： APPJ electrical characterization discharge power Lissajous figure

Childhood leukemia genetic bottleneck phenomenon related to tEL-AML1:the postulation by a mathematical model

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中华医学杂志(英文版) 2012年第6期125卷 1182-1185页

作者： Petar Ivanovski Ivan Ivanovski Dimitrije Nikoli Ivana jovanovi Department of Pediatrics University Children's HospitalSchool of Medicine University of Belgrade

Childhood leukemia bottleneck phenomenon is the most mysterious corollary of the prenatal origin discovery of leukemogenic chromosome *** bottleneck is evidence that leukemia initiation,by in utero acquired chromosome translocations that generate functional fusion genes,is far more common than the incidence rate of corresponding *** childhood tEL-AML1+acute lymphoblastic leukemia（ALL） this equates to approximately

关键词： translocation t(12 21) tEL-AMLl fusion gene childhood acute lymphoblastic leukemia B cell clones

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电容效应对冷阴极荧光灯电流平衡的影响

现代显示 2007年第3期 38-42页

作者： Yuequan Hu milan M. jovanovi＇c 石琳（译） Delta能量电子研究室美国北卡罗来纳27709 北京科技大学美国北卡罗来纳27709

在并联的冷阴极荧光灯中,由电流不平衡导致发光不均匀是多灯背光源系统中普遍存在的一个问题。而通过对灯架构造进行合理设计,可以减轻这种电流不平衡。

关键词：电容效应冷阴极荧光灯背光