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Often difficulties and measurement uncertainties arise in determination of capillary pressure in laboratory experiments. In order to avoid this problem, we have developed a new mathematical model for calculating capillary pressure. The adequacy of fit for this model has been confirmed experimentally and by comparing with literature data. Based on the model, we propose a new and simpler method for...
A new transmission failure model for Avionics Full-Duplex Switched Ethernet (AFDX) is established in this paper. It aims at quantifying the transmission failure with the real-time considerations. Using the statistical mean field theory, the failure function with the traffic dynamics considerations is determined. Simulation results can verify the effectiveness of our model. This study can contribute...
Skills possessed by human welders typically require a long time to develop. Especially, maintaining the torch to travel in desired speed is challenging. In this paper, a feedback control system is designed and implemented to assist the welder to adjust the torch movement for the desired speed in manual gas tungsten arc welding (GTAW) process. To this end, an innovative helmet based manual welding...
Avionics systems play a significant role in civil aircraft, and its reliability is directly related to the flight safe. In this paper, integrated modular avionics (IMA), as the most advanced avionics systems, is analyzed. Via exploration of the interaction mechanism of IMA and real physical system, its property of cyber-physical systems (CPS) is determined. Hence, according to different functional...
Because of the interactions between four modes of supply of trade in service, it increases the complications when constructing policy of trade in service. In this paper, we put forward 4 assumptions that the positive effects of Presence of Natural Persons (mode 4) have on Commercial Presence (mode 3). In addition, with US export data and gravity model, we try to quantify the above effects by using...
AFDX (Avionics Full Duplex Switched Ethernet) is a new kind of real-time Ethernet, of which the end-to-end transmission delay has been a major concern. In this paper, configuration decomposition method based on AFDX configuration is proposed in three steps. Firstly, Virtual Links (VLs) are divided into direct influence set, indirect influence set and no influence set. Secondly, the whole AFDX configuration...
This paper presents a new model based on the event-based reliability model (EBRM) and the Markov process to study the global reliability of telecommunication networks. This approach tries to use the independent failure events to describe the dependent link failures, and then uses the Markov process to construct the different network failure states based on the independent failure events. Finally a...
OWL-S plays a key role in describing behaviors of Web services because of potential semantic Web. Although OWL-S has given semantics to concepts by ontology technology, it gives no formal semantic for control-flow and data-flow. Most of previous related research concentrates on model checking instead of providing a precise mathematic semantics for the specification. This gives limitation when properties...
OWL-S is an important standard for semantic web and its process model not formalized complete. There are some researches working on formalizing semantics of OWL-S process model and this paper is one of them. Rewrite logic system Maude is choose to formalize the informal part semantics of OWL-S in our work. Use Maude as a specification language, semantics of a subset of OWL-S process model elements...
Along with the development of object-oriented technology, component development is gradually extended to commercial off-the-shelf (COTS) components and component-based software development (CBSD) has gradually become the dominant orientation of the field of software engineering. The claims of high reliability need further investigation based on reliability analysis techniques that are applicable to...
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