Sökning: "lifetime risk"

Visar resultat 11 - 15 av 186 avhandlingar innehållade orden lifetime risk.

1. 11. Margins of Prevention : - On Older Adolescents' Positive and Negative Beliefs about Illicit Drug Use

   Författare :Patrik Karlsson; Anders Bergmark; Edle Ravndal; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Illicit drugs; adolescents; prevention; margins for change; beliefs; perceptions; expectancies; positive; negative; risk; pleasure; Sweden; Social work; Socialt arbete;

   Sammanfattning : This study explores older adolescents’ positive and negative beliefs about illicit drug use from a preventive perspective. By positive beliefs is meant positive expectancies and benefit perceptions. By negative beliefs is meant negative expectancies and risk perceptions. LÄS MER

3. 12. Continuum Mechanics Modelling of Corrugated Board

   Författare :Ulf Nyman; Institutionen för byggvetenskaper; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material technology; assumed natural strain shell; failure criterion; lifetime; reliability; moisture transport; sorption hysteresis; corrugated board; hygro-elasticity; Materiallära; materialteknik;

   Sammanfattning : The storage of compressive loaded boxes in an environment with naturally varying humidity is a practical issue in corrugated board employment. Time dependent variables such as moisture content, strain fields, stress fields and material strength play important roles for the time to failure. LÄS MER

4. 13. Toward resilient product-based service supply chains

   Författare :Gabriella Gatenholm; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; product-based services; service development; Supply Chain; service supply chain; sustainability; circular economy; risk; resilience;

   Sammanfattning : Circular economies represent a step toward breaking the linear production model in supply chains. As drivers of enhanced circularity, product-based service (PBS) offerings extend and/or intensify the utilization period of products and thus decelerate the flow of resources. LÄS MER

5. 14. Interpretable Battery Lifetime Prediction Using Early Degradation Data

   Författare :Huang Zhang; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; interpretable machine learning; uncertainty quantification; lithium-ion battery; lifetime early prediction; capacity knee;

   Sammanfattning : Battery lifetime prediction using early degradation data is crucial for optimizing the lifecycle management of batteries from cradle to grave, one example is the management of an increasing number of batteries at the end of their first lives at lower economic and technical risk. In this thesis, we first introduce quantile regression forests (QRF) model to provide both cycle life point prediction and range prediction with uncertainty quantified as the width of the prediction interval. LÄS MER

7. 15. Condition measuring and lifetime modelling of disconnectors, circuit breakers and other electrical power transmission equipment

   Författare :Per Westerlund; Patrik Hilber; Tommie Lindquist; William Q Meeker; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; reliability; maintenance; condition monitoring; disconnector; circuit breaker; Weibull distribution; prediction; risk analysis; decision making; beta distribution; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : The supply of electricity is important in modern society, so the outages of the electric grid should be few and short, especially for the transmission grid. A summary of the history of the Swedish electrical system is presented. The objective is to be able to plan the maintenance better by following the condition of the equipment. LÄS MER