Weikai Liu

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The limit extended capability is one of the key parameters in drilling design and drilling operation for an extended reach well, but people often overlook it. The study on this aspect is still rare at present. According to the practical drilling condition in extended reach well, the interstice element theory for the friction analysis of whole drill string(More)
This paper deals with the problem of measurement feedback impulsive control for synchronization of uncertain delayed stochastic complex networks with switching topologies. The network topology consists of r modes and switches from one mode to another according to a Markovian chain. The parametric uncertainties are assumed to be of a linear fractional form.(More)
This paper studies the problem of multi-criteria comprehensive evaluation under the uncertain information, i.e.,the criteria values are given in the forms of linguistic fuzzy numbers. The method of transforming the linguistic fuzzy numbers into trapezoidal fuzzy numbers is given, and a new multi-criteria comprehensive evaluation model is presented based on(More)
This paper is concerned with the optimal problem for team and member selection in Mathematical Contest in Modeling (MCM). Based on fuzzy mathematical theory and optimization theory, the optimization model for team and member selection is proposed. Specifically, in view of this proposed team selection index system, the basic qualities and abilities which(More)
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