Research ArticleOpen accessIn the keywordsMapping Learning Algorithms on Data, a Useful Step for Optimizing Performances and Their ComparisonFilippo NeriIn this paper, we propose a novel methodology to map learning algorithms on data (performance map) in order to gain more insights into the distribution of their performances across their parameter space. This methodology provides useful information when selecting a learner's best configuration for the data at hand and it also enhances the comparison of learners across learning contexts. In … …Journal of Computer Science, Vol. 20, Issue 9 · 10 Jul 2024 · 4,501 accessesView PDFCite
Research ArticleOpen accessIn the keywordsUse of Lazy Wavelet and DCT for Vibration Signal CompressionPierre ELE, Auguste Ndtoungou, Jean Pierre Ngantcha, Aimé Joseph Oyobe OkassaIn this study, we compress and decompress the vibration signals from the functioning of a ball bearing. The methodology used to compress the vibration data in this study is to reduce the size of the data by reducing the spectral redundancy of the samples. We have used the DCT, which is recognized for its representational parsimony and bleaching power. To … …American Journal of Engineering and Applied Sciences, Vol. 14, Issue 1 · 9 Jan 2021 · 6,863 accessesView PDFCite
Review ArticleOpen accessIn the keywordsMechatronic Systems to the Braking MechanismsRelly Victoria Virgil PetrescuWith the evolution of technology, the construction and geometry of the piston, together with the materials from which it is made, as well as the related manufacturing technologies, have been continuously improved. Thus, modern engines have become less polluting, working at higher temperatures and pressures. Body aerodynamics have been improved, leading to lower resistance forces from the air. Also, the … …Journal of Mechatronics and Robotics, Vol. 4, Issue 1 · 18 Aug 2020 · 6,954 accessesView PDFCite
Research ArticleOpen accessIn the keywordsPresents the Kinematics of a Manipulator with Three MobilitiesRelly Victoria Virgil PetrescuThe paper briefly presents the kinematic study of a manipulator with three mobilities, which can be used both in industrial halls and in garages, depending on its suitably chosen constructive size, which at smaller dimensions can be handled very easily. This manipulator can carry large loads, thus easing the work of the human being and preventing it from major dangers … …Journal of Mechatronics and Robotics, Vol. 4, Issue 1 · 30 May 2020 · 6,262 accessesView PDFCite
Research ArticleOpen accessIn the keywordsPresents the Kinematics and Forces at a Basic Anthropomorphic RobotRelly Victoria Virgil PetrescuThe basic structure of the anthropomorphic robots used today massively in 80-90% cases from the industrial robots will be presented briefly, with the highlighting of an original method for determining the kinematics of the basic 3R module and with highlighting the forces at the basic structure set in the discussion. Some representative examples of calculation will be remembered as results. … …Journal of Mechatronics and Robotics, Vol. 4, Issue 1 · 14 May 2020 · 6,307 accessesView PDFCite
Research ArticleOpen accessIn the keywordsPresentation of Four-stroke Engine Design ElementsRelly Victoria Virgil PetrescuHaving escaped the shadow of the global energy crisis by implementing nuclear fission, wind, solar, bioenergy, but also by producing and extracting (deep) gases capable of providing us with planetary reserves for two more. Or at least three thousand years, we have started to relax more energetically, but due to the huge pollution produced by cars, the rules of their … …Journal of Mechatronics and Robotics, Vol. 4, Issue 1 · 28 Apr 2020 · 6,950 accessesView PDFCite
Review ArticleOpen accessIn the keywordsInternal Combustion Engines ForcesRelly Victoria Virgil PetrescuThe paper presents an algorithm for determining the dynamic parameters of the internal combustion mechanism. Shows the force distribution (on the main engine mechanism) on internal combustion engines. Dynamically, tools can be distributed in the same way as forces. Practically, in dynamic regimes, speeds have the same synchronization with forces. The method applies separately for two distinct situations: When the … …Journal of Mechatronics and Robotics, Vol. 3, Issue 1 · 23 Jul 2019 · 6,267 accessesView PDFCite
Research ArticleOpen accessIn the keywordsNew About the Balancing of Thermal MotorsNicolae Petrescu, Florian Ion Tiberiu PetrescuThe paper presents a new method of balancing the thermal motors, the method that perfectly fits the engines with modern internal combustion. This new constructive method imposes a new in-line engine design in order to better balance it, thus achieving a static balancing and total dynamics of the new type of internal combustion heat engine. The method can also be … …Journal of Mechatronics and Robotics, Vol. 3, Issue 1 · 22 Jul 2019 · 5,823 accessesView PDFCite
Review ArticleOpen accessIn the keywordsMechanisms With Rigid MemoryRelly Victoria Virgil PetrescuAlong with gears, distribution mechanisms are the most widely used mechanical transmissions used over the past 300 years and will continue to be the most widespread in all industrial fields but also in other technical areas. For this reason, it was considered necessary this work, which tries to add a brick to the permanent construction of rigid memory mechanisms used … …Journal of Mechatronics and Robotics, Vol. 3, Issue 1 · 19 Jul 2019 · 6,162 accessesView PDFCite