About Analysis of Emissions from a Switched Mode Power Supply

The paper is dedicated to the analysis in the frequency domain of the currents (in common mode and differential mode) which generate conducted emissions in the supplying cable of the equipment containing a switch mode power supply (SMPS). The performed simulation considers the standard CISPR 16-1-2 which refers to specifications, methods, and test apparatus for the measurements of disturbances and immunity to conducted emissions. One proposes solutions to limit and control the conducted emissions generated by the SMPS within the supplying cable that result into noise currents and high frequency currents within the range 150 kHz – 30 MHz that might interfere with other electric equipment. Various ways to limit the mentioned emissions are simulated and analyzed. The influence of the duty-cycle over the frequency spectrum from the conducted emissions range is considered and the worst case is determined. The conclusion is that the optimum filtering solution involves the use of an EMI filter, the results being compared to the CISPR 22 standard

New Dynamic Balancing System Based on Magnetic Interaction and Software Removal of some Perturbations

The purpose of this paper is to present a new type of dynamic balancing system, having a driving solution of the rotating part based on magnetic interactions. The magnetic system also plays the role of an elastic bearing. In the first part of the article is presented the technical solution which allows the dynamic balancing evaluation depending on the radial displacement between two disks with permanent magnets, creating a magnetic coupling. It is presented the results obtained on the experimental way, that validated both the numerical simulation as well as the analytic calculation. Using a 2D model, the resultant magnetic force was analytically calculated, whose value depends on the misalignment of the balanced part, against the equilibrium position. Due to the specific geometry, to validate the 2D analytical calculation model, it was necessary to create a FEM model of the magnetic system. A simulation was performed to evaluate the dependence between the radial displacements and the magnetic forces. It was used a 3D simulation software, specific for these kind of problems - the INFOLYTICA software. The final results show that there is a similarity between 2D analytical calculation model, 3D simulation and practical measurements. In the second part of the article it is presented a practical application for this type of balancing system, used to build a two plane dynamic balancing machine for cardan shafts. It is also shown how it can be eliminated the disturbing unbalance introduced by the clamping system of the balanced part using a software method

MS-CLAM: Mixed Supervision for the classification and localization of tumors in Whole Slide Images

International audienceGiven the size of digitized Whole Slide Images (WSIs), it is generally laborious and time-consuming for pathologists to exhaustively delineate objects within them, especially with datasets containing hundreds of slides to annotate. Most of the time, only slide-level labels are available, giving rise to the development of weakly-supervised models. However, it is often difficult to obtain from such models accurate object localization, e.g., patches with tumor cells in a tumor detection task, as they are mainly designed for slide-level classification. Using the attention-based deep Multiple Instance Learning (MIL) model as our base weakly-supervised model, we propose to use mixed supervision-i.e., the use of both slide-level and patch-level labels-to improve both the classification and the localization performances of the original model, using only a limited amount of patch-level labeled slides. In addition, we propose an attention loss term to regularize the attention between key instances, and a paired batch method to create balanced batches for the model. First, we show that the changes made to the model already improve its performance and interpretability in the weakly-supervised setting. Furthermore, when using only between 12 and 62% of the total available patch-level annotations, we can reach performance close to fully-supervised models on the tumor classification datasets DigestPath2019 and Camelyon16

THE GRASSLAND NATURA 2000 HABITATS FOUND IN BĂIŢA-CRĂCIUNEŞTI QUARRY AND THE SURROUNDINGS, HUNEDOARA COUNTY

Following field research conducted in Baita-Craciuneşti quarry and neighborning, the presence of an extremely interesting vegetation cover was discovered, characterized by a very large biodiversity, with a quite good state of preservation due to the influence of anthropo-zoogen factors in this area. Herbaceous vegetation is the vegetation of grasslands, ruderal vegetation and saxicole vegetation, weeds vegetation and ruderal vegetation (present around households, buildings, shelters, warehouses, along the roads and trails or quarry trash pit). The most importants grassland habitats are: 6520 - Mountain hay meadows; CLAS. PAL.: 38.31., 6440 - Alluvial meadows of river valleys of the Cnidion dubii; CLAS. PAL.: 37. and 6240* - Sub-pannonic steppic grasslands; CLAS. PAL.: 34.315. These habitats are highly significant for the ecological rehabilitation here