1. Using neural networks in the process of calibrating the microsimulation models in the analysis and design of roundabouts in urban areasIrena Ištoka Otković, 2011, doktorska disertacija Opis: The thesis researches the application of neural networks in computer program calibration of traffic microsimulation models. The calibration process is designed on the basis of the VISSIM microsimulation model of local urban roundabouts.
From the five analyzed methods of computer program calibration, Methods I, II and V were selected for a more detailed research. The three chosen calibration methods varied the number of outgoing traffic indicators predicted by neural networks and a number of neural networks in the computer program calibration procedure. Within the calibration program, the task of neural networks was to predict the output of VISSIM simulations for selected functional traffic parameters  traveling time between the measurement points and queue parameters (maximum queue and number of stopping at the roundabout entrance). The Databases for neural network training consisted of 1379 combinations of input parameters whereas the number of output indicators of VISSIM simulations was varied. The neural networks (176 of them) were trained and compared for the calibration process according to training and generalization criteria. The best neural network for each calibration method was chosen by using the twophase validation of neural networks.
The Method I is the calibration method based on calibration of a traffic indicator traveling time and it enables validation related to the second observed indicator – queue parameters. Methods II and V connect the previously described calibration and validation procedures in one calibration process which calibrates input parameters according to two traffic indicators.
Validation of the analyzed calibration methods was performed on three new sets of measured data  two sets at the same roundabout and one set on another location. The best results in validation of computer program calibration were achieved by the Method I which is the recommended method for computer program calibration.
The modeling results of selected traffic parameters obtained by calibrated VISSIM traffic model were compared with: values obtained by measurements in the field, the existing analysis methods of operational roundabouts characteristics (Lausanne method, KimberHollis, HCM) and modeling by the uncalibrated VISSIM model. The calibrated model shows good correspondence with measured values in real traffic conditions. The efficiency of the calibration process was confirmed by comparing the measured and modeled values of delays, of an independent traffic indicator that was not used in the process of calibration and validation of traffic microsimulation models.
There is also an example of using the calibrated model in the impact analysis of pedestrian flows on conflicting input and output flows of vehicles in the roundabout. Different traffic scenarios were analyzed in the real and anticipated traffic conditions. Ključne besede: traffic models, traffic microsimulation, calibration of the VISSIM model, computer program calibration method, neural networks in the calibration process, microsimulation of roundabouts, traffic modeling parameters, driving time, queue parameters, delay Objavljeno: 02.06.2011; Ogledov: 3748; Prenosov: 263 Celotno besedilo (13,21 MB) 
2. Investigation into the effect of different fuels on ignition delay of Mtype diesel combustion processDževad Bibić, Ivan Filipovič, Aleš Hribernik, Boran Pikula, 2008, izvirni znanstveni članek Opis: An ignition delay is a very complex process which depends on a great number of parameters. In practice, definition of the ignition delay is based on the use of correlation expressions. However, the correlation expressions have very often limited application field. This paper presents a new correlation which has been developed during the research project on the direct injection Mtype diesel engine using both the diesel and biodiesel fuel, as well as different values of a static injection timing. A dynamic start of injection, as well as the ignition delay, is defined in two ways. The first approach is based on measurement of a needle lift, while the second is based on measurement of a fuel pressure before the injector. The latter approach requires calculation of pressure signals delay through the fuel injection system and the variation of a static advance injection angle changing. The start of a combustion and the end of the ignition delay is defined on the basis of measurements of an incylinder pressure and its point of separation from a skipfire pressure trace. The developed correlation gives better prediction of the ignition delay definition for the Mtype direct injection diesel engine in the case of diesel and biodiesel fuel use when compared with the classic expression by the other authors available in the literature. Ključne besede: ignition delay, diesel engine, Mtype, biodiesel Objavljeno: 31.05.2012; Ogledov: 1068; Prenosov: 230 Celotno besedilo (372,50 KB) Gradivo ima več datotek! Več...

3. Modeling the large scale disruptions of an airline networkMilan Janić, 2005, izvirni znanstveni članek Opis: When the largescale disruptions of airline networks occur, they can cause significant deterioration of the planned schedule. Such deterioration shows upin the form of long delays, rerouting and/or cancellation of flights. This paper presents a model for assessment of the economic consequences of largescale disruptions of an airline single hubandspoke network. These consequences are expressed by the cost of delayed and cancelled complexes of flights. The model is based on the theory of queuing systems with the airline hub airport as a server and the complexes of flights as customers. The difference between the service time of the affected and planned complexes determine their delays caused by a given disruptive event. The cost of delays and revenues of the affected flights, and global airline mitigating strategies are used to determine the total airline cost of delayed and cancelled complexes. The model is applied to the disrupted hubandspoke network of a large European airline. The purpose is to illustrate the model's planning nature, complexity of the problem, influence of the relevant factors,and the magnitude of the economic consequences. Ključne besede: air transportation, airlines, networks, delay time Objavljeno: 05.06.2012; Ogledov: 994; Prenosov: 68 Povezava na celotno besedilo 
4. Henríquez, Hernán R.: The Kneser property for abstract retarded functional differential equations with infinite delay.  Int. J. Math. Math. Sci. 2003, no. 26, 16451661 (2003). [ISSN 01611712]Miklavž Mastinšek, 2004, recenzija, prikaz knjige, kritika Ključne besede: matematika, diferencialne enačbe, Kneserjeva lastnost, zvezna polgrupa, mathematics, functionaldifferential equations, Kneser property, infinite delay, continuous semigroup, existence, mild solutions Objavljeno: 10.07.2015; Ogledov: 353; Prenosov: 8 Povezava na celotno besedilo 
5. Balachandran, K.; Ravikumar, R.: Nonlocal Cauchy problem for time varying delay integrodifferential equations of Sobolev type in Banach spaces. (English).  [J] Tamkang J. Math. 37, No. 3, 193205 (2006). [ISSN 00492930]Miklavž Mastinšek, 2008, recenzija, prikaz knjige, kritika Ključne besede: matematika, navadne diferencialne enačbe, polgrupe nelinearnih operatorjev, mathematics, differential equations, delay integrodifferential equation, nonlocal condition Objavljeno: 10.07.2015; Ogledov: 300; Prenosov: 15 Povezava na celotno besedilo 
6. Liu, XinGe; Wu, Min; Martin, Ralph; Tang, MeiLan: Delaydependent stability analysis for uncertain neutral systems with timevarying delays. (English).  [J] Math. Comput. Simul. 75, No. 12, 1527 (2007). [ISSN 03784754]Miklavž Mastinšek, 2008, recenzija, prikaz knjige, kritika Ključne besede: matematika, navadne diferencialne enačbe, asimptotična stabilnost, mathematics, ordinary differential equations, neutral delaydifferential system Objavljeno: 10.07.2015; Ogledov: 452; Prenosov: 14 Povezava na celotno besedilo 
7. Impact of hybrid queing disciplines on the VoIP traffic delaySaša Klampfer, Jože Mohorko, Žarko Čučej, 2009, izvirni znanstveni članek Opis: Impact of hybrid queuing disciplines on the VoIP traffic delay Ključne besede: hibridne metode, načini uvrščanja, VoIP, zakasnitev, ožičeno omrežje, hybrid methods, queuing disciplines, VoIP, delay, wired network Objavljeno: 10.07.2015; Ogledov: 564; Prenosov: 5 Povezava na celotno besedilo 
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9. Dimensioning of signalized intersections in realistic urban environmentMatej Dobovšek, Drago Sever, 2005, pregledni znanstveni članek Opis: It is very complex to assure the dynamics of traffic networkin urban environment because of the intensity of traffic flowsand the limited space in the urban area. Signalized intersectionsare undoubtedly very important and frequent element inroad traffic network in urban regions, which greatly influencesthe traffic flow dynamics on each section as in the whole trafficnetwork. The time (delay) a vehicle needs to drive through anintersection directly influences the travel comfort, fuel consumption,traffic pollution and so on. There are many methodsfor dimensioning signalized intersections in the world literature.One of the most applied methods is the HIGHWAY CAPACI1YMANUAL (HCM) 2000 which is based on competentinput traffic flows and other characteristics of traffic signalregulations. The intention of this paper is to establish whetherwe can use the HCM 2000 method directly in the Slovenian realenvironment. Based on the established methodology of researchand limited number of delay measurement in real environmentintersections, there have been some deviations. Thecompletion of the level of service criterion for signalized intersectionshas been proposed, with the intention for more suitabilityestimation in the realistic environment. Ključne besede: road traffic, intersections, signallization, control delay measurement, level of service Objavljeno: 02.06.2017; Ogledov: 416; Prenosov: 44 Celotno besedilo (2,73 MB) Gradivo ima več datotek! Več...

10. Synchronous bursts on scalefree neuronal networks with attractive and repulsive couplingQingyun Wang, Guanrong Chen, Matjaž Perc, 2011, izvirni znanstveni članek Opis: This paper investigates the dependence of synchronization transitions of bursting oscillations on the information transmission delay over scalefree neuronal networks with attractive and repulsive coupling. It is shown that for both types of coupling, the delay always plays a subtle role in either promoting or impairing synchronization. In particular, depending on the inherent oscillation period of individual neurons, regions of irregular and regular propagating excitatory fronts appear intermittently as the delay increases. These delayinduced synchronization transitions are manifested as wellexpressed minima in the measure for spatiotemporal synchrony. For attractive coupling, the minima appear at every integer multiple of the average oscillation period, while for the repulsive coupling, they appear at every odd multiple of the half of the average oscillation period. The obtained results are robust to the variations of the dynamics of individual neurons, the system size, and the neuronal firing type. Hence, they can be used to characterize attractively or repulsively coupled scalefree neuronal networks with delays. Ključne besede: synchronization, neuronal networks, noise, stochastic processes, scalefree networks, information transmission delay Objavljeno: 19.06.2017; Ogledov: 419; Prenosov: 215 Celotno besedilo (933,65 KB) Gradivo ima več datotek! Več...
