Search results for "analyysi"
showing 10 items of 1950 documents
Big high-dimensional data analysis with diffusion maps
2013
High-dimensional Big Data processing with dictionary learning and diffusion maps
2015
Algorithms for modern Big Data analysis deal with both massive amount of sam- ples and a large number of features (high-dimension). One way to cope with these challenges is to assume and discover the existence of localization in the data by uncovering its intrinsic geometry. This approach suggests that different data segments can be analyzed separately and then unified in order to gain an understanding of the whole phenomenon. Methods that utilize efficiently local- ized data are attractive for high-dimensional big data analysis, because they can be parallelized, and thus the computational resources, which are needed for their utilization, are realistic and affordable. These methods can explo…
Channel Increment Strategy-Based 1D Convolutional Neural Networks for Seizure Prediction Using Intracranial EEG
2022
The application of intracranial electroencephalogram (iEEG) to predict seizures remains challenging. Although channel selection has been utilized in seizure prediction and detection studies, most of them focus on the combination with conventional machine learning methods. Thus, channel selection combined with deep learning methods can be further analyzed in the field of seizure prediction. Given this, in this work, a novel iEEG-based deep learning method of One-Dimensional Convolutional Neural Networks (1D-CNN) combined with channel increment strategy was proposed for the effective seizure prediction. First, we used 4-sec sliding windows without overlap to segment iEEG signals. Then, 4-sec …
Hybrid vibration signal monitoring approach for rolling element bearings
2019
New approach to identify different lifetime stages of rolling element bearings, to improve early bearing fault detection, is presented. We extract characteristic features from vibration signals generated by rolling element bearings. This data is first pre-labelled with an unsupervised clustering method. Then, supervised methods are used to improve the labelling. Moreover, we assess feature importance with each classifier. From the practical point of view, the classifiers are compared on how early emergence of a bearing fault is being suggested. The results show that all of the classifiers are usable for bearing fault detection and the importance of the features was consistent. peerReviewed
Pitkittäisaineistojen faktorimalleista ja niiden rakentamisesta sekä sovellus "Vanhemmat, opettajat ja lapsen oppiminen" -tutkimukseen
2007
Konfirmatorisesta faktorianalyysista ja sen käytöstä reliabiliteetti- ja validiteettitarkasteluissa yleisten kielitutkintojen syksyn 1998 englannin k…
2000
Reliabiliteetin ja validiteetin analysointi konfirmatorisen faktorianalyysin avulla; sovellus koululaisten liikunta-aineistoon
1998
Kahden maailman välissä : Marko Tapion Arktinen hysteria Väinö Linnan haastajana
2004
Matti Kuhna tutki väitöskirjatyössään keskisuomalaisen kirjailijan Marko Tapion pääteosta Arktinen hysteria (1967, 1968). Kuhna havaitsi, että teos on modernistinen vastine Väinö Linnan Pohjantähti-trilogialle (1959–1962) ja Tuntemattomalle sotilaalle (1954). Kuhnan mukaan Arktisen hysterian merkitys nykylukijalle ja aikalaislukijalle avautuu olennaisella tavalla, jos sitä luetaan Pohjantähti-trilogian ja Tuntemattoman sotilaan vastateoksena. Vastateoksena lukeminen merkitsee teosten intertekstuaalisten (tekstienvälisten) suhteiden selvittelyä.Tapion intentiona Arktista hysteriaa kirjoittaessaan oli sanoa kansalliseksi terapeutiksi kohonneen Linnan käsittelemät asiat uudesta näkökulmasta. L…
Polyseeminen "vaikka" ja neuvottelun retoriikka / Polysemic forms of "vaikka " and the rhetoric of negotiation
2006
Polysemic forms of vaikka and the rhetoric of negotiation (englanti) 2/2006 (110) Polysemic forms of vaikka and the rhetoric of negotiation The article analyses the use of the Finnish lexeme vaikka ([al]though but also even if, say, for example and on the other hand, indeed) in spoken Finnish, and especially in certain planning and negotiating situations. The forms in which this lexeme occur are described as facilitators of argumentation based on concessiveness. The writer applies the cardinal concessive schema of Couper-Kuhlen and Thompson (2000): In negotiations this schema is used to modify, weaken or contradict statement X and to confirm counter statement Y. The writer hypothesises that…