Papers by Keyword: Mechanisms

Abstract: Technological progress introduces new ideas and methods that eventually end up being in another technology. One technology can not provide a solid ground for the future and, thus, technologies intervene with each other. A combination of technologies allows the achievement of greater application in different fields and areas and better performance and functionality. The Internet of Things is not a new idea, but due to the improvement of other technology can be used in different industries to achieve better optimization. Internet of Things can be found in different industries, but the focus of this work is in the field of robotics. Therefore, the following work will try to illustrate the use of technology in this field. A brief definition of the Internet of Things will be covered. The application of the technology in robotics will be outlined with its future perspectives. The advantages and drawbacks of the Internet of Things in the field of robotics will be discussed at the end.

Abstract: The carbonation process in alkali-activated slag cement concrete is more complicated. This paper reviews the research progress of carbonation resistance of alkali-activated slag cement concrete at home and abroad and summarizes the existing research on carbonation. The focus is on the carbonation mechanism, test methods, influencing factors and the effect of carbonation on the performance of alkali-activated slag cement concrete. The problems existing in the current research on the anti-carbonation property of alkali-activated slag cement concrete and the issues for further research are proposed.

Abstract: In this paper, we propose to use a spectrometer (SCIO) manipulated by a robotic arm to determine the carbohydrates content in fruits and vegetables. The vegetable products are moved on a conveyor belt according to the robotic process. In order to increase the economic efficiency, the robotic system can be placed in a detachable module that can be easily transported in various places for spectrometric analysis. After the analysis, the robotic system will place on the fruit / vegetable packaging a label containing information regarding the carbohydrates concentration in fruits / vegetables.

Abstract: Surface observations are used to elucidate the deformation mechanisms responsible forsuperplasticity in the Ti-6Al-4V and Ti-4Al-2.5V-1.5Fe titanium alloys. First, stress relaxation testsare used to quantify the difference in superplastic behaviour of each alloy. Then, high-temperature insitutensile tests are performed in the scanning electron microscope at 700, 800, and 900°C to relatedifferences in formability to micro-mechanisms. These are found highly dependent on: (i) the grainsize; (ii) the alpha-to-beta volume fraction; (iii) the crystallographic texture; and (iv) the nature and angle ofthe dominant grain boundaries.

Abstract: Three fatigue regimes in accordance with three scale levels are considered and mechanisms of fatigue crack origination subsurface discussed. Surface hardening procedure can be used for the transition area of the crack origination from surface to subsurface in High-Cycle-Fatigue (meso-scale level) regime. In this case subsurface cracking characterized the same fatigue curve that was constructed for the Very-High-Cycle-Fatigue (micro-scale level) regimes due to the same mechanism of metals cracking. This effect was considered for Al-and Fe-based alloys. Subsurface crack origination can be received because of introduction of residual compressive stresses in the bulk material in the Low-Cycle-Fatigue (macro-scale-level) regime. The unified or master fatigue curve can be constructed for all scale levels for metals if subsurface crack origination will be realized because of hardening procedures for meso-and macro-scale levels. Subsurface crack origination in Very-High-Cycle-Fatigue regime for Ti-based alloy in the case of torsion is also discussed and three scale levels for fatigue regimes are demonstrated.

Abstract: In the first part, the paper presents a classification of the in pipe inspection robots and the features of the mechanisms used in the design of the pipe inspection robots with adaptable structure. The authors’ contribution to the development of three wheeled minirobots with two four bar mechanisms placed on two parallel planes, is presented is the second part of the paper.

Abstract: ‘Sonication - cryptic growth’ technology can reduce 30-80% excess sludge in wastewater treatment systems. Various mechanisms contribute to the sludge reduction but the role of each one is unclear. This paper quantitatively studied the potential mechanisms in ‘sonication - cryptic growth’. The operation condition was: every day 20% sludge was sonicated under 1.2 Wml^-1 for 15 min and then returned to the wastewater treatment reactor for cryptic growth. The results showed that under such conditions, ‘sonication - cryptic growth’ reduced the excess sludge by 57.3% and the effluent met the national discharge standard. Multiple mechanisms were involved in the process. Detailed analysis showed that the ‘lysis-cryptic growth’ mechanism was the most important one and accounted for 49.1% of sludge reduction. Biodegradation of residual sludge was the second important one and contributed 19.5%. Other potential mechanisms included the altered microbial community, longer sludge retention time, and accumulation of persistent materials. But organic load increase had virtually no impact.