6th International congress of the Serbian society of mechanics: Review

Ovaj rad prikazuje najvažnije informacije o 6. kongresu Srpskog društva za mehaniku, koji je održan na Tari od 19. do 21. juna 2017. Kongres je organizovan od strane Srpskog društva za mehaniku. Dat je kratak prikaz najznačajnijih radova predstavljenih na ovom kongresu, a koji se bave teorijskom i primenjenom mehanikom.This paper presents the most important information and describes the activities of the 6th Congress of the Serbian Society of Mechanics which was held on mountain Tara, on 19- 21 June, 2017. The Congress was organized by the Serbian Society of Mechanics. Brief summaries of the plenary lectures and some of 99 accepted papers, which admittedly attracted the most interest were shown as well

6th International congress of the Serbian society of mechanics: Review

Ovaj rad prikazuje najvažnije informacije o 6. kongresu Srpskog društva za mehaniku, koji je održan na Tari od 19. do 21. juna 2017. Kongres je organizovan od strane Srpskog društva za mehaniku. Dat je kratak prikaz najznačajnijih radova predstavljenih na ovom kongresu, a koji se bave teorijskom i primenjenom mehanikom.This paper presents the most important information and describes the activities of the 6th Congress of the Serbian Society of Mechanics which was held on mountain Tara, on 19- 21 June, 2017. The Congress was organized by the Serbian Society of Mechanics. Brief summaries of the plenary lectures and some of 99 accepted papers, which admittedly attracted the most interest were shown as well

International Conference on Continuous Optimization (ICCOPT) 2019 Conference Book

The Sixth International Conference on Continuous Optimization took place on the campus of the Technical University of Berlin, August 3-8, 2019. The ICCOPT is a flagship conference of the Mathematical Optimization Society (MOS), organized every three years. ICCOPT 2019 was hosted by the Weierstrass Institute for Applied Analysis and Stochastics (WIAS) Berlin. It included a Summer School and a Conference with a series of plenary and semi-plenary talks, organized and contributed sessions, and poster sessions. This book comprises the full conference program. It contains, in particular, the scientific program in survey style as well as with all details, and information on the social program, the venue, special meetings, and more

Stochastic analysis and design of vibrating barriers under simulated ground motion processes

Vibration control techniques have developed remarkably over the past thirty years. These solutions are usually employed to protect new rather than existing structures, for which most of the available control devices may be costly and invasive to install. Recently, Vibrating Barriers (ViBas) have been proposed as a solution to protect both new and existing buildings. By exploiting the Structure-Soil-Structure-Interaction (SSSI) phenomenon, the ViBa is constructed away from the structures to be protected allowing the characteristics of the buildings to remain unaltered. The ViBa is envisaged as a vibrating mass placed into the soil, through which the control device interacts with the structure in its proximity and is therefore able to control vibrations for cluster of buildings. Up until now the efficiency of the ViBa has only been demonstrated for simple cases of seismic deterministic input and stationary Gaussian stochastic processes. This research explores the multiple interactions between a building and a ViBa device in order to assess its performance in realistic earthquake scenarios. By means of Direct Stochastic methods, this research presents a methodology to design the ViBa validated through pertinent Monte Carlo Simulation. The effects of the input selection on the ViBa performance are investigated by analysis of the building-soil-ViBa system response under advanced stochastic Ground Motion Models (GMMs). In regard to this, a technique is proposed to simulate earthquake ground motions in agreement with seismic codes and reproducing the non-stationarity and natural variability typical of recorded earthquakes. Initial investigations on the response of linear and non-linear structures, under the proposed ground motion and a traditional quasi-stationary and non-stationary model, have demonstrated that the choice of the ground motion has considerable influence over the study of the reliability of structures also for the simple case of linear behaving structures. From the analyses, the sensitivity of the distribution of the relevant response parameters (e.g. the peak displacement) to the GMMs is shown. All spectrum compatible models adopted fulfil the code provisions, however noticeable differences in the distribution of response parameters are observed. Moreover, studies on the sensitivity of structural responses to damping variation have been performed to address the significance of the GMM selection in relation to the assumptions on the structural damping. Finally, some drawbacks in the current seismic codes have also been identified. In order to establish the methodology for the design of the ViBa under stochastic excitation, the discrete formulation for buildings-soil-ViBa-systems available in the frequency domain has been extended to the time domain. The methodology proposed in this work enables a simplified reliability assessment by defining the mean value of the maxima response displacements under stationary Gaussian stochastic seismic action firstly and successively verified for non-stationary input. From the investigations, the effectiveness of the ViBa is exhibited as having reductions of up to 37.80 % of the mean and up to 41.49% of the fractile 95% of the peak displacements

Past, Present, and Future of Simultaneous Localization And Mapping: Towards the Robust-Perception Age

Simultaneous Localization and Mapping (SLAM)consists in the concurrent construction of a model of the environment (the map), and the estimation of the state of the robot moving within it. The SLAM community has made astonishing progress over the last 30 years, enabling large-scale real-world applications, and witnessing a steady transition of this technology to industry. We survey the current state of SLAM. We start by presenting what is now the de-facto standard formulation for SLAM. We then review related work, covering a broad set of topics including robustness and scalability in long-term mapping, metric and semantic representations for mapping, theoretical performance guarantees, active SLAM and exploration, and other new frontiers. This paper simultaneously serves as a position paper and tutorial to those who are users of SLAM. By looking at the published research with a critical eye, we delineate open challenges and new research issues, that still deserve careful scientific investigation. The paper also contains the authors' take on two questions that often animate discussions during robotics conferences: Do robots need SLAM? and Is SLAM solved