Sökning: "reliability"

Visar resultat 31 - 35 av 2167 avhandlingar innehållade ordet reliability.

1. 31. Outcome in psychiatric outpatient services : reliability, validity and outcome based on routine assessments with the GAF scale

   Författare :Per Söderberg; Stefan Tungström; Bengt-Åke Armelius; Odd E. Havik; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; reliability; validity; outcome; effectiveness; clinical; significance; GAF scale; DSM-IV; outpatients; psychiatry; dose response; services; Psychology; Psykologi;

   Sammanfattning : The general aim of the studies presented in this thesis is to investigate the possibility of using clinical data to measure outcomes in psychiatric outpatient services. The specific aims are to investigate whether routine clinical assessments and ratings are reliable and have adequate validity, and then to use these data to calculate treatment outcomes and explore factors that affect these outcomes. LÄS MER

3. 32. Structural Reliability and Identification with Stochastic Simulation - Application to Railway Mechanics

   Författare :Sadegh Rahrovani; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; model reduction; time-integration; finite element model; sleeper-ballast load characterization; stochastic simulation; Bayesian system identification;

   Sammanfattning : System identification of structures based on measured response data can play a key role in improving reliability based structural designs. However, the experimental limitations of in situ tests and uncertainties of required model complexity together with the inverse nature of system identification give rise to a number of challenging issues. LÄS MER

4. 33. Redundancy and Robustness Quantification of Bridge Systems based on Reliability and Risk Approaches

   Författare :Silvia Sarmiento; Gabriel Sas; Jaime Gonzalez-Libreros; Robert Hällmark; Thomas Blanksvärd; Sebastian Thöns; John Leander; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Existing bridges; reliability; risk; metamodel; Finite Element Modeling; Model tests; Byggkonstruktion; Structural Engineering;

   Sammanfattning : Over the last few decades, evaluating the performance of existing structures has become increasingly important, particularly as the number of bridges reaching their design life continues to rise. As a result, there is a growing need for effective and accurate procedures to guide the assessment of the current structures' capacity and safety levels to implement appropriate maintenance and rehabilitation strategies. LÄS MER

5. 34. Reliability, fatigue and mechanical characterization of lead-free solders for electronic packaging applications

   Författare :Cristina Andersson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reliability.; Isothermal mechanical fatigue; Tensile tests; Mechanical behavior; Electronics; Thermal fatigue; Lead-free solders; Low cycle fatigue;

   Sammanfattning : The ever increasing amount of electronic waste, most of which ends up in landfills, has become a serious worldwide concern. In addition to this, the fact that Pb is highly toxic and harmful to humans has lead to the ban of this element from the electronics industry. LÄS MER

7. 35. Estimation of the reliability of systems described by the Daniels Load-Sharing Model

   Författare :Patrik Rydén; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Non-parametric and parametric estimation; Equal Load-sharing models; asymptotic distribution; martingale; resam-pling; life testing; reliability; Mathematical statistics; Matematisk statistik;

   Sammanfattning : We consider the problem of estimating the failure stresses of bundles (i.e. the tensile forces that destroy the bundles), constructed of several statisti-cally similar fibres, given a particular kind of censored data. LÄS MER