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High energy consumption, low efficiency and the difficulty of modeling the platform injection-production system are the main issues appeared on the offshore petroleum platform. For addressing these problems, fuzzy control can be easily used to resolved the control model problem, this paper designs the improved fuzzy controller to online adjust the scaling factor by analyzing the influence of the quantization...
This paper presents a multiple-model hypothesis testing (MMHT) approach using a representative model (RM) for detecting unknown events that may have multiple distributions. It addresses various difficulties of MMHT for composite, multivariate, nondisjoint, and mis-specified hypothesis sets with correlated observations, and decides which region of the mode space covered by the model set is better....
Maintaining blood glucose concentration within a normal range is very important to diabetic patients. Many control algorithms, including the PID method, have been proposed to restore normal glucose tolerance via closed-loop insulin regulation. This paper analyzes the physiologically plausible glucose feedback control system involving the islets-based controller and the nonlinear pharmacokinetic model...
Double sequential probability ratio test (2-SPRT), as an extended version of SPRT to cope with the no-upper-bound problem, is extended to the multiple-model hypothesis testing (MMHT) approach, called 2-MMSPRT, for detecting unknown events that may have multiple prior distributions. Not only does it address the mis-specified problem of the SPRT based MMHT method (MMSPRT), but it also can be expected...
This paper presents a numerical simulation based on computational fluid dynamics (CFD) method on the enhancement of natural ventilation in an industrial workshop with heat source induced by solar chimney (SC). Four types of SC were designed to attach to the top and southern roof of the workshop. Realizable k-ε turbulent model and DO (discrete ordinate) radiation model were used to calculate the air...
Multi-signature is a mechanism which is more and more widely used in modern office system, especially in decision-making. However, no mature solutions were acknowledged or published openly by far. In this paper, we propose a novel solution for multi-signature handling, which is based on workflow resolution. Furthermore, we extend the Liaison workflow model by adding a new element, which marks signature...
The basic theory of the evidential reasoning (ER) approach is firstly introduced. Since many uncertainties and ambiguities are included in a variety of real decision making problems, accurate number is not competent for the description of the assessment value any more. Some ER models in the circumstance of interval belief degrees or interval weights are then proposed by some people. The analytical...
The non-equilibrium grain-boundary segregation (NGS) theory serve to provide a more complete understanding of inter-granular segregation behavior in relation to mechanical properties, not only for the engineering steels but also for a wide range of structural alloys. The analysis and computation task for grain-boundary segregation kinetics process is complex and cumbersome as it can involve a vast...
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