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In practical chemical plants, melt index (MI) can only be measured by off-line analysis which cost 2–4 hours. So it is important to develop online analyzers using process data especially when the mechanism is complex. A novel data based soft-sensing method is proposed for MI estimating in propylene polymerization process. This approach is constructed under just-in-time modeling scheme, in which historical...
In this work [1], we investigate electron emission from vertically well-aligned single layer graphene inside a gap with an applied voltage. By considering electron traveling through an internal time-dependent potential barrier on the planar surface of the graphene sheet and then through an edge barrier, the current density is calculated. It is found that the over-barrier electron emission is the main...
Considering steady state voltage stability, load margin that calculated by continuation power flow (CPF) tool is limited by two constrains which are called saddle-node bifurcation (SNB) and limit induced bifurcation (LIB). The boundary of the load margin is complex and non-convex, so that the conventional approach for closest bifurcation is most likely to get a local closest solution instead of the...
In order to evaluate the real stock value of second board market enterprises in China, this paper try to build a effective model for measuring them. The model which we build were based on the EVA evolution model and enterprises life cycle theories. We choose a real high technology corporation to test our net present EVA model, and find that the real value of the corporation which computed by our model...
This paper presents an integration framework of wisdoms of experts with different field knowledge and experiences for complex system analysis . We call these experts as realm experts in the paper. Hall for workshop of meta-synthetic engineering (HWME), proposed by QIAN Xue-sen, is an accepted important method for complex system analysis. After briefly reviewing the research situation of complex system...
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