Search for dissertations about: "Operational Stability"

Showing result 1 - 5 of 105 swedish dissertations containing the words Operational Stability.

2. 1. Stability and inactivation mechanisms of two transaminases

   Author : Shan Chen; Per Berglund; Patrick Adlercreutz; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Amine Transaminase; Operational Stability; Inactivation Pathway; Enzyme Unfolding; Phosphate Group Binding Cup; Bioteknologi; Biotechnology;

   Abstract : In the past decades, more and more enzymes are employed as biocatalysts in industrial processes because of their advantages, such as high efficiency, substrate selectivity and stereoselectivity. Among them, amine transaminases (ATAs) are pyridoxal 5’-phosphate (PLP) dependent enzymes. READ MORE

4. 2. A Computational Framework for Control of Machining System Capability : From Formulation to Implementation

   Author : Andreas Archenti; Cornel Mihai Nicolescu; Mamoru Mitsuishi; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machining system; Stability; Statistical Dynamics; Elastic Linked System ELS ; Operational Dynamic Parameters ODP ; Loaded Double Ball Bar LDBB ; Virtual Machining System Engine VMSE ; Contactless Excitation and Response System CERS .; SRA - Production; SRA - Produktion;

   Abstract : Comprehensive knowledge and information about the static and dynamic behaviour of machine tools, cutting processes and their interaction is essential for machining system design, simulation, control and robust operation in safe conditions. The very complex system of a machine tool, fixture and cutting tools during the machining of a part is almost impossible to model analytically with sufficient accuracy. READ MORE

5. 3. The Effect of Different Perturbations on the Stability Analysis of Light Water Reactors

   Author : Victor Dykin; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; BWR and PWR stability; stability indicators; propagating density perturbation; autocorrelation function; density wave oscillations; decay ratio; non-white driving force; damped harmonic oscillator; reduced order models; Green s function technique;

   Abstract : Neutron noise analysis techniques are studied and developed, with primary useof determining the stability of Boiling Water Reactors (BWRs). In particular, the role ofa specific perturbation prevailing in Light Water Reactors, the propagating densityperturbation, in the stability of BWRs and on the noise field of LWRs in general, isinvestigated by considering three topics. READ MORE

6. 4. Data-driven methods for real-time voltage stability assessment

   Author : Hannes Hagmar; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; security assessment; neural networks; Dynamic voltage security margin; machine learning; voltage instability prediction; voltage stability;

   Abstract : Voltage instability is a phenomenon that limits the operation and the transmission capacity of a power system. An operation state close to the security limits enables a cost-effective utilization of the system but it could also make the system more vulnerable to disturbances. READ MORE

7. 5. Model-Based Investigation of Machining Systems Characteristics : Static and Dynamic Stability Analysis

   Author : Andreas Archenti; Mihai Nicolescu; Amir Rashid; KTH; []
   Keywords : Machining systems; modelling; TECHNOLOGY; TEKNIKVETENSKAP;

   Abstract : The increasing demands for precision and efficiency in machining call for new control strategies for machining systems based on the identification of static and dynamic characteristics under operational conditions. By considering the machining system as a closed-loop system consisting of a machine tool structure and a machining process, the join system characteristics can be analyzed. READ MORE