Browsing NTNU Open by Author "Srivastav, Himanshu"
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Development of Penalized Complexity Priors for Stationary and Invertible Time Series Processes
Srivastav, Himanshu (Master thesis, 2017)In the thesis, the PC prior framework is applied to construct the prior distributions for dependencies of the AR(1) processes, the MA(1) processes and the ARMA(1,1) processes. -
Introduction of degradation modeling in qualification of the novel subsea technology
Srivastav, Himanshu; Lundteigen, Mary Ann; Barros, Anne (Journal article; Peer reviewed, 2021)All-electric systems are the novel subsea technology that is an upgrade of widely deployed electro-hydraulic control systems. They promised more reliable equipment and a safer environment. An all-electric production system ... -
Optimization of periodic inspection time of sis subject to a regular proof testing
Srivastav, Himanshu; de Azevedo Vale, Guilherme; Barros, Anne; Lundteigen, Mary Ann; Pedersen, Frank Børre; Hafver, Andreas; Oliveira, Luiz F. (Chapter, 2018)Periodic testing is a method to ascertain the availability of Safety Instrumented Systems (SIS). These systems are generally passive and are activated only on demand. Testing is then required to diagnose their current state ... -
Optimizing condition monitoring for dynamic health and risk management
Srivastav, Himanshu (Doctoral theses at NTNU;2021:74, Doctoral thesis, 2021)This Ph.D. thesis explains the concepts of condition monitoring and associated challenges in maintenance modeling for subsea facilities. Thesis’s main objective is to develop systematic frameworks to assess the performance ... -
Predictive Maintenance and Battery Management for wireless sensors.
Shah, Sanjay (Master thesis, 2019)Wireless sensor networks (WSNs) becomes an emerging technology and has been adopted by several companies for data communication and processing. Many leading companies use wireless sensor’s network for different purposes. ... -
Study of testing and maintenance strategies for redundant final element in SIS with imperfect detection of degraded state
Zhang, Aibo; Srivastav, Himanshu; Barros, Anne; Liu, Yiliu (Journal article; Peer reviewed, 2021)Safety-instrumented systems (SISs) have been widely installed to lower risks of equipment/ process by performing the designed safety functions in cases of demands. Final elements remain dormant mostly in a low demand mode ...