3 research outputs found
Semantic Shopping: A Literature Study
The digitalization of the economy and society overall has a significant impact on customers’ shopping behavior. After being conditioned by experiences in entertainment or simple Internet search, customers increasingly expect that a smart shopping assistant understands his/her shopping intentions and transfers these to shopping recommendations. Thus, the emerging opportunity in this context is to facilitate an intention-based shopping experience similar to the way semantic search engines provide responses to enquiries. In order to progress this new area, we differentiate alternative types of shopping intentions to provide the first set of conversation patterns. Grounded in the Speech Act Theory and a structured literature review, semantic shopping is defined and different types of shopping intentions are deduced
A decision-making tool for real-time prediction of dynamic positioning reliability index
PhD ThesisThe Dynamic Positioning (DP) System is a complex system with significant levels of
integration between many sub-systems to perform diverse control functions. The extent of
information managed by each sub-system is enormous. The sophisticated level of integration
between sub-systems creates an array of possible failure scenarios. A systematic analysis of all
failure scenarios would be time-consuming and for an operator to handle any such catastrophic
situation is hugely demanding. There are many accidents where a failure in a DP system has
resulted in fatalities and environmental pollution. Therefore, the reliability assessment of a DP
system is critical for safe and efficient operation. The existing methods are time-consuming,
involving a lot of human effort which imposes built-in uncertainty and risk in the system during
complex operation.
This thesis has proposed a framework for a state-of-the-art decision-making tool to assist an
operator and prevent incidents by introducing a new concept of Dynamic Positioning –
Reliability Index (DP-RI). The DP-RI concept covers three phases, leading to technical
suggestions for the operator during complex operations, which are defined as Data,
Knowledge, Intelligence, and Action. The proposed framework covers analytics including
descriptive, diagnostic, predictive and prescriptive analytics. The first phase of the research
involves descriptive and diagnostic analytics by performing big data analytics on the available
databases to identify the sub-systems which play critical roles in DP system functionality. The
second phase of the research involves a novel approach where predictive analytics are used for
the weight assignment of the sub-systems, dynamic reliability modelling and offline and realtime forecasting of DP-RI. The third phase introduces innovative prescriptive analytics to
provide possible technical solutions to the operator in a short time during failures in the system
to enable them to respond quickly and prevent DP incidents. Thus, the DP-RI acts as an
innovative state-of-the-art decision-making tool which can suggest possible solutions to the
DPO by using analytics on the knowledge database. The results proved that it is a useful tool
if implemented on an actual vessel with diligent integration with the DP control system.Singapore Economic Development Board (EDB) and DNV
GL Singapore Pte Ltd