Sökning: "load current"

Visar resultat 11 - 15 av 387 avhandlingar innehållade orden load current.

1. 11. Towards environmentally sustainable freight transport: shippers' logistics actions to improve load factor performance

   Författare :Vendela Santén; Chalmers tekniska högskola; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sustainability; systems approach; shipper; logistics activities; links; performance; load factor; freight transport; environment; actions;

   Sammanfattning : The purpose of this thesis is to explain how shippers’ logistics actions contribute to environmentally sustainable freight transport, by clarifying the link between logistics activities and the resulting load factor performance. Five studies have been undertaken, which have given rise to six papers. LÄS MER

3. 12. Current harmonic modeling of aggregated electric vehicle loads in the low voltage grid

   Författare :Georgios Foskolos; Erik Dahlquist; Lennart Söder; Mälardalens högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electric Vehicles; current harmonics; modeling; aggregation; power-exponential functions; Energy- and Environmental Engineering; energi- och miljöteknik;

   Sammanfattning : The proliferation of Electric Vehicles (EVs) poses new challenges for the Distribution System Operator (DSO). For example, the rectifiers that are used for charging EV batteries could significantly influence Power Quality (PQ), in terms of harmonic distortion. LÄS MER

4. 13. Runtime Management of Multiprocessor Systems for Fault Tolerance, Energy Efficiency and Load Balancing

   Författare :Stavros Tzilis; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fault Tolerance; Algorithms; Runtime Management; Multiprocessors; Performance; Adaptive Systems; Load Balancing; Energy Efficiency;

   Sammanfattning : Efficiency of modern multiprocessor systems is hurt by unpredictable events: aging causes permanent faults that disable components; application spawnings and terminations taking place at arbitrary times, affect energy proportionality, causing energy waste; load imbalances reduce resource utilization, penalizing performance. This thesis demonstrates how runtime management can mitigate the negative effects of unpredictable events, making decisions guided by a combination of static information known in advance and parameters that only become known at runtime. LÄS MER

5. 14. Beyond the Force: Redefining load exposure assessments of nutrunners for improved power tool ergonomics

   Författare :Ava Mazaheri; Linda Rose; Mikael Forsman; Romain Haettel; Joel Cort; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Power Tools; Nutrunners; Work Related Musculoskeletal Disorders; Risk Assessment; Load Exposure; Assembly Work; Monteringsverktyg; Mutterdragare; Arbetsrelaterade Muskuloskeletala Besvär; Riskbedömning; Belastningsexponering; Monteringsarbete; Teknik och hälsa; Technology and Health;

   Sammanfattning : Reaction force exposure from handheld tightening tools (also known as nutrunners) constitutes an acknowledged contributor to musculoskeletal disorders among assembly operators, and are today not regulated by explicit limits. The research presented in this thesis aimed at contributing to the development of recommended exposure limits for, and assessments of, reaction loads from handheld right-angle and pistol-grip tightening tools. LÄS MER

7. 15. Traffic Load Effects on Bridges, Statistical Analysis of Collected and Monte Carlo Simulated Vehicle Data

   Författare :Abraham Getachew; KTH; []
   Nyckelord :bridge; traffic load; transverse distribution; characteristic value; weigh in motion;

   Sammanfattning : Research in the area of bridge design has been and still isconcentrated on the study of the strength of materials andrelatively few studies have been performed on traffic loads andtheir effects. Traffic loads have usually been assumed to begiven in codes. LÄS MER