Computer Aided Determination of Criteria Priority for Structural Optimization of Technical Systems

Malakov, Ivo; Zaharinov, V. V.

doi:10.1016/j.proeng.2014.03.049

Cited by 8 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, these methods allow only the influence and significance of the different parameters of polymerization process as well as the correlation between them to be revealed. Using the regression analysis, the optimal parameters of each process, which guarantee maximal properties of the object or material, can be calculated [33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Photopolymerization Process of Dental Composites

et al. 2021

View full text Add to dashboard Cite

The aim of this paper is to perform optimization of photopolymerization process of dental composites in order to obtain maximum hardness. Samples (5 mm diameter; 2, 3 and 4 mm thickness) were made of Universal Composite (UC), Bulk fill Composite (BC) and Flowable Composite (FC). Light curing of specimens was performed with 600, 1000 and 1500 mW/cm2 light intensity and an irradiation time of 20, 40 and 60 s. Vickers microhardness on the top and bottom surfaces of samples was measured. Optimization was carried out via regression analysis using QStatLab software. Photopolymerization process parameters were calculated using a specially designed MatLab software-based algorithm. For all composites, regression models for hardness on top and bottom surfaces of composite layer were established. Layer thickness as well as hardness on top and bottom surfaces of each composite was calculated for 21 curing modes varying with light intensity and irradiation time. It was established that photopolymerization guidelines only of FC manufacturer guarantee the required hardness, while recommended regimes for UC and BC did not satisfy this requirement. Tables, containing recommended light curing regimes, were developed for three composite types, guaranteeing high hardness of composite restoration. They were designed to facilitate work of dentists in dental offices.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimization of Photopolymerization Process of Dental Composites

et al. 2021

View full text Add to dashboard Cite

show abstract

“…It is based on the mathematical model of the function of the dynamic error as an independent component having particular characteristics and participating in the formation of the measurement result. In this way the chosen concept enables not only to examine the characteristics of the dynamic error but also to develop algorithms [9][10][11], methods [12] and instruments [13,14] for discriminating it as an independent component.…”

Section: The Mathematical Model Of the Dynamic Errormentioning

confidence: 99%

А Меаsuring Method for Gyro-Free Determination of the Parameters of Moving Objects

Dichev¹,

Koev²,

Bakalová³

et al. 2016

Metrology and Measurement Systems

View full text Add to dashboard Cite

The paper presents a new method for building measuring instruments and systems for gyro-free determination of the parameters of moving objects. To illustrate the qualities of this method, a system for measuring the roll, pitch, heel and trim of a ship has been developed on its basis. The main concept of the method is based, on one hand, on a simplified design of the base coordinate system in the main measurement channel so as to reduce the instrumental errors, and, on the other hand, on an additional measurement channel operating in parallel with the main one and whose hardware and software platform makes possible performing algorithms intended to eliminate the dynamic error in real time. In this way, as well as by using suitable adaptive algorithms in the measurement procedures, low-cost measuring systems operating with high accuracy under conditions of inertial effects and whose parameters (intensity and frequency of the maximum in the spectrum) change within a wide range can be implemented.

show abstract