Sökning: "Matti Lehtonen"
Hittade 5 avhandlingar innehållade orden Matti Lehtonen.
1. Military intelligence analysis : institutional influence
Sammanfattning : Intelligence is vital for the outcome of battles. As long as humans wage war, there will be a need for decision support to military and civilian leaders regarding adversaries or potential adversaries. However, the production of intelligence is neither easy nor without pitfalls. LÄS MER
2. Applications of Unsupervised Deep Learning for Analysing Time-Varying Power Quality Big Data
Sammanfattning : Continuous power quality monitoring allows grid stakeholders to obtain information about the performance of the network and costumer facilities. Moreover, the analysis of continuous monitoring allows researchers to obtain knowledge on power quality phenomena. Power quality measurements result in a large amount of data. LÄS MER
3. On the polymer-based nanocomposites for electrical switching applications
Sammanfattning : Recent research demonstrated that polymer based nanocomposites (PNCs) have been engineered in order to improve the arc interruption capability of the circuit breakers. PNCs are the combination of nano-sized inorganic nanoparticles (NPs) and polymers, opened up new developments in materials science and engineering applications. LÄS MER
4. Development of on-line diagnostic methods for medium voltage XLPE power cables
Sammanfattning : On-line diagnostics of power system components is an important area since it allows the diagnostics to be performed at regular intervals during the normal operation of the components. This combined with reliability centered maintenance could lead to reduced customer outages. LÄS MER
5. Fault location in resonant earthed medium voltage distribution systems
Sammanfattning : A major challenge in electric distribution systems is to increase the reliability of the electricity supply in an economical way. At the final medium-voltage level in the system, such as 10 kV or 20 kV, a single feeder may supply tens of medium/low-voltage transformers and hundreds of customers, with many branches of lines and cables where faults can occur. LÄS MER