Search results for "ritmi"
showing 10 items of 258 documents
RELAZIONE FRA I LIVELLI EMATICI DI PCR, FIBRINOGENO C E MMP-9 E DIFFERENTI PATTERN CLINICI DELL'ARITMIA
2010
Arritmias
2021
Píldora educativa sobre arritmias. Material de la asignatura Patología cardiorrespiratoria del grado de Fisioterapia.
Fāzes kodēšana aberāciju mērījumos
2022
Darbs ir uzrakstīts latviešu valodā uz 25 lapaspusēm. Tas satur 17 attēlus, 3 pielikumus un 40 atsauces uz literatūras avotiem. Darba mērķis: Novērtēt fāzes modulāciju intervāla ietekmi uz aberāciju mērīšanas kvalitāti. Metode: Dažāda apjoma simulētu un reālu aberāciju objektu imaginārās daļas, reālās daļas un viļņu frontes rekonstruēšana MATLAB, izmantojot dažāda modulāciju intervāla fāzes maskas un algoritmu PhaseLift. Rezultāti: Tika veiksmīgi rekonstruētas gan simulētu, gan reālu aberāciju objektu reālā (amplitūda) un imaginārā (fāze) daļa, un viļņu fronte, izmantojot PhaseLift algoritmu. Tika pārbaudīta PhaseLift algoritma efektivitāte pie dažāda apjoma aberācijām. Secinājumi: Mērāmo a…
On data mining applications in mobile networking and network security
2014
Taming big knowledge evolution
2016
Information and its derived knowledge are not static. Instead, information is changing over time and our understanding of it evolves with our ability and willingness to consume the information. When compared to humans, current computer systems seem very limited in their ability to really understand the meaning of things. On the other hand, they are very powerful when it comes down to performing exact computations. One aspect which sets humans apart from machines when trying to understand the world is that we will often make mistakes, forget information, or choose what to focus on. To put this in another perspective, it seems like humans can behave somehow more randomly and still outperform …
Automatic social distance estimation for photographic studies: Performance evaluation, test benchmark, and algorithm
2022
The social distancing regulations introduced to slow down the spread of COVID-19 virus directly affect a basic form of non-verbal communication, and there may be longer term impacts on human behavior and culture that remain to be analyzed in proxemics studies. To obtain quantitative results for such studies, large media and/or personal photo collections must be analyzed. Several social distance monitoring methods have been proposed for safety purposes, but they are not directly applicable to general photo collections with large variations in the imaging setup. In such studies, the interest shifts from safety to analyzing subtle differences in social distances. Currently, there is no suitabl…
Optimization of Linearized Belief Propagation for Distributed Detection
2020
In this paper, we investigate distributed inference schemes, over binary-valued Markov random fields, which are realized by the belief propagation (BP) algorithm. We first show that a decision variable obtained by the BP algorithm in a network of distributed agents can be approximated by a linear fusion of all the local log-likelihood ratios. The proposed approach clarifies how the BP algorithm works, simplifies the statistical analysis of its behavior, and enables us to develop a performance optimization framework for the BP-based distributed inference systems. Next, we propose a blind learning-adaptation scheme to optimize the system performance when there is no information available a pr…
Modeling and Mitigating Errors in Belief Propagation for Distributed Detection
2021
We study the behavior of the belief-propagation (BP) algorithm affected by erroneous data exchange in a wireless sensor network (WSN). The WSN conducts a distributed multidimensional hypothesis test over binary random variables. The joint statistical behavior of the sensor observations is modeled by a Markov random field whose parameters are used to build the BP messages exchanged between the sensing nodes. Through linearization of the BP message-update rule, we analyze the behavior of the resulting erroneous decision variables and derive closed-form relationships that describe the impact of stochastic errors on the performance of the BP algorithm. We then develop a decentralized distribute…
Algorithmic issues in computational intelligence optimization: from design to implementation, from implementation to design
2016
The vertiginous technological growth of the last decades has generated a variety of powerful and complex systems. By embedding within modern hardware devices sophisticated software, they allow the solution of complicated tasks. As side effect, the availability of these heterogeneous technologies results into new difficult optimization problems to be faced by researchers in the field. In order to overcome the most common algorithmic issues, occurring in such a variety of possible scenarios, this research has gone through cherry-picked case-studies. A first research study moved from implementation to design considerations. Implementation limitations, such as memory constraints and real-time r…
Informācijas burbuļu nozīme studentu informacionālajā telpā
2021
Bakalaura darbs par informācijas burbuļa nozīmi studentu informacionālajā telpā tika izstrādāts, lai noskaidrotu, kā informācijas burbuļi ietekmē studentu informacionālo telpu, un meklētu iemeslus, kāpēc ir tik vienkārši ieslīgt filtru burbulī. Svarīgs pētījuma jautājums uz, kuru bija jāatrod atbilde bija kādas ir līdzības un atšķirības starp filtru un informācijas burbuļiem. Pētījumā tika izmantotas divas teorijas – sociālā konstruktīvisma un tīmekļa vārtu sargāšanas teorija. Pētījuma rezultātā var secināt, ka informācijas burbulis ir studentu dzīves daļa ar, ko ir jāmācās sadzīvot, un studenti to dara labprāt, bet viņiem ir nepieciešams profesionāļu atbalsts, lai labāk saprastu, kā sadzīv…