Sökning: "peak power"

Visar resultat 1 - 5 av 309 avhandlingar innehållade orden peak power.

1. 1. Peak and Power Reduction in Multicarrier Communication Systems

   Författare :Niklas Andgart; Institutionen för elektro- och informationsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telekommunikationsteknik; line driver; Signal processing; Signalbehandling; Telecommunication engineering; power reduction; DSL; DMT; tone reservation; PAR; Peak to average ratio;

   Sammanfattning : Broadband multicarrier communication suffers from a large signal span, causing problems in both wireless and wireline systems. This is commonly referred to as a high peak to average ratio (PAR), and leads to a high power consumption, which is an important limitation in many communication systems. LÄS MER

3. 2. A Passing Power : An Examination of the Sources for the History of Aram-Damascus in the Second Half of the Ninth Century B.C

   Författare :Sigurdur Hafthorsson; Stig Norin; Dag Oredsson; Hans Barstad; Uppsala universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Biblical studies; 1 Kings; 2 Kings; Adad-idri; Adad-nirari III; Ahab; Aram; Aramaic; Aram-Damascus; Arslan-Tash; Ashtaroth; Assyriology; Bar-Hadad; Ben-Hadad; Bethsaida; Bible; biblical archaeology; bit-hilani; Black Obelisk; empire; Damascus; Hazael; Hazor; hegemony; Iron Age II; Melqart; Old Testament; Ramoth Gilead; Shalmaneser III; Tel Dan; Zakkur; Bibelvetenskap exegetik; Religion Theology; Religionsvetenskap Teologi; gamla testamentets exegetik; Old Testament Exegesis;

   Sammanfattning : Much has been written about the kingdom of Aram-Damascus, and if one considers the scarcity of the source material, one could almost say: too much! One of the results of this study is that our historical sources do not support such an extensive history of this kingdom as some scholars have written. The study is a thorough examination of both textual and archaeological sources for the history of the kingdom of Aram-Damascus. LÄS MER

4. 3. Efficient and Wideband Power Amplifiers for Wireless Communications

   Författare :Paul Saad; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; multi-band; Doherty power amplifier; high efficiency; Branch-line coupler; wideband.; power amplifier; GaN-HEMT;

   Sammanfattning : The rapid evolution of wireless communication systems and the developmentof new standards require that wireless transmitters process several types ofstandards across multiple bands. Power amplifiers (PAs) are key componentsin wireless transmitters because they have a big impact on the overall systemperformance in terms of their bandwidth, efficiency, and linearity. LÄS MER

5. 4. Power Control Systems in a Flywheel based All-Electric Driveline

   Författare :Janaína Gonçalves de Oliveira; Hans Bernhoff; Mats Leijon; Torbjörn Thiringer; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Flywheels; batteries; electric vehicles; control systems; power electronics; electric machines; efficiency.; Electric power engineering; Elkraftteknik; Electrical engineering; Elektroteknik; Electronics; Elektronik; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Sammanfattning : Flywheel systems are attractive in hybrid and electric vehicles due to their ability to handle power during acceleration and braking. The combination of a flywheel device with a battery source has several advantages such as high peak power capacity, high energy density and reduction in the number of charge/discharge cycles of the battery. LÄS MER

7. 5. On the hosting capacity of distribution networks for solar power

   Författare :Enock Mulenga; Math Bollen; Nicholas Etherden; Luis (Nando) Ochoa; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aleatory; distribution networks; epistemic; hosting capacity; overvoltage; solar power; stochastic; Electric Power Engineering; Elkraftteknik;

   Sammanfattning : The future will bring changes in energy production and consumption that will affect the performance of electricity distribution networks. Electric vehicle charging will increase consumption; the installation of solar photovoltaic (PV) units will increase production. Both will change the energy flow and affect the power quality. LÄS MER