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In the material research we often investigate the mass transport phenomenon. As is known the mass in metals are transferred by diffusion movement. Most of the physical and chemical process is related with the diffusion phenomenon. It is the most important subject for the material science which we call it diffusion theory. Now we usually adopt the experimental method to research the diffusion in the...
Modular design is a valid design method in the mechatronics product design process, which has an important effect on the product development. This paper is devoted to presenting a systematic modular design approach based on modular interface technology. The interfaces of mechatronics system include mechanical interface, electrical interface, mechatronics interface, software interface, and man-machine...
The refractive indices of (Al0.48In0.52As)z(Ga0.47In0.53As)1-z, and GaxIn1-xAsyP1-y quaternary materials is presented from a model that takes into account of band-to-band Coulomb interaction and Urbach broadening. We apply an accurate absorption model to calculate the contribution near band-edge region by a complete closed-form Kramers-Kronig transform. A Sellmeier-type single-oscillator model includes...
This paper presents a performance analysis of a multiline material parameter extraction method. The multiline method is a newly developed technique for the characterization of printable electronics structures and integrated microwave structures, with dramatically improved accuracy of the extracted material parameters. An analysis of the performance of three error-box models used with the multiline...
The study is one of the very few attempts to investigate antecedents and consequences of satisfaction with an Internet-based learning medium. By extending McKinney et al.'s (2002) web-customer satisfaction model, the research model postulates a positive link between overall satisfaction and intention to continue to use an ILM. Data collected from 504 undergraduate students are examined through the...
The trabecular bones are highly dispersive acoustic media composed by randomly shaped trabeculae (considered as scatterers) and surrounded by bone marrow. An acoustic wave generated by an incident ultrasonic pulse with respect to the media under study, shows that its velocity and amplitude are a function of the density size and shaped of the scatterers. Two different methods were used to theoretically...
The migration of the existing Voyager library system to the Aleph library system is currently in progress at the National and University Library in Zagreb. Involved at the same time in the Integrated Library System implementation process are the libraries of the University of Zagreb and scientific institutes, which had used other library systems up till now. The objective of the implementation is...
Genetic algorithm is a efficient way to solve the logistics-related problem, the mathematic model is analyzed and the key technology of building simulation model in eM-Plant is researched in this paper, and also the build-in genetic algorithm of optimizing module is used to optimize picking system based on the eM-Plant simulation model, which can assure the scientific decision.
Establishing fatigue crack propagation rate is the key to forecasting structure fatigue lifetime, nine parameters fatigue crack propagation rate model and McEvily model are widely applied at present, but it is very complex to realize these models, partial derivative must be calculated and there is large deviation between fitted static parameter and actual value and physical conception isn't clear...
The product collaborative design process had such characters: multidisciplinary, hierarchy, concurrent, phase, iteration, cooperativity, restriction and conflict- ineluctability. The present product design process modeling methods have their own characters, however, most of them suppose design to be a simple technical decision-making activity. They fail to describe the information completely, support...
In this paper we present the application of Simulation for Predictive Control (SimPC) as a decision making tool for improvement of non-automated distribution centers (DCs). SimPC is focused on determining the viability of a given truck- dock assignment schedule, including arrival times and dock assignments for inbound and outbound trucks. SimPC also serves to perform iterative procedures of system...
Rapidly growing quantities of digital video have made video data become a more important role in many applications than ever. Virtual scene construction also uses video materials as a rich resource. In order to manage the video materials like salient objects and scenes, an effective video retrieval system is required. In this paper, we present a video database management system using a hierarchical...
Process mining is a branch of data mining that aims to discover process model from the event logs. In this study, we propose a hybrid approach to process mining in such a way that, "from-to chart" is used as the frontend to monitor the transitions among activities of a realistic event log. Another novelty of this study is developed evaluation metrics, which are used for finding immediate...
The paper deals with an analytical model for hysteresis cycle representation. The hysteresis curve is decomposed in a series of arcs of circles and segments of lines. Each arc of circle or segment of line is expressed using analytical geometry as a function of some given parameters or calculated ones. The easiness of the model proposed is given by the small amount of input data needed to represent...
This document describes an approach to support an automated generation of simulation models by use of already existing engineering data. The concept enables engineers to execute tests in parallel to the development of the control applications, using a physical model of the controlled system. The simulation model forms a virtual representation of the process plant that is still under construction at...
This paper presents a CAD system, termed as HO-CAD, for heterogeneous object modeling based on ACIS and HOOPS. The HO-CAD system is composed of four modules which are used for creation, representation and visualization of geometry and material composition information, respectively. In the process of the software designing and programming, such considerations as interactivity, open ability, integrating...
This paper presents a study on method to develop student model by identifying the students' characteristics in an adaptive hypermedia learning system. The study involves the use of student profiling techniques to identify the features that may be useful to help the researchers have a better understanding of the student in an adaptive learning environment. We propose a supervised Kohonen network with...
High number of approaches and methods has been developed in the course of attempts to establish higher education programs on the Internet. The most frequent difficulties emerge from not enough systematic descriptions and restriction of implementation of the teaching and learning processes to administrative methods. Although, application methods from object modeling are promising, appropriate representations...
Element method model construction, a new approach for product modeling, is to positively impact on the front-end modeling methods for product design through boundary-lines of design deriving from progressive constraints on different parameter conditions.
Monte Carlo simulation and modification are carried out to rectify the negative prediction of standard deviation of the logarithm of fatigue lives and the absence of confidence assessment of historic probabilistic fatigue S-N curves. An adjustable random numerical generator, mix multiplicative isogenous arithmetical compliment method, is applied in the random simulation process. Sample size for the...
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