Tiejun Chen

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This paper presents a Dynamic Multi-Swarm Particle Swarm Optimizer (DMS-PSO) for solving blocking flow shop scheduling problems with makespan criterion. Using small swarms and a regrouping schedule, DMS-PSO has a better global search ability. In order to improve its local search ability, a special designed local search phase is added into the algorithm. The(More)
BACKGROUND Most studies have found that osteopontin (OPN) expression level is related to the poor prognosis of gastric cancer. However, few studies have examined the relationship between OPN expression and gastric precancerous diseases, and the potential role of OPN in the formation and development of GC. We investigated the relationships between serum OPN(More)
OBJECTIVE The present study aimed to investigate the effectiveness of parenteral nutritional support with ω-3 PUFAs-based lipid emulsions in patients after liver resection. METHODS A total of 119 patients were randomly assigned to the immunonutrition (IM) group (n = 59) and control group (n = 60). The IM group was continuously given Omegaven(®) 10% 100(More)
In China, direct-reverse flotation is proved to be applicable to most phosphate ores. However, because the ratio of froth product is generally high, current direct-reverse technology faces challenges in terms of high reagent consumptions and cost. A new gravity and flotation combined process has been developed for the recovery of collophanite from(More)
In this paper, we focus on multi -- scale modeling and simulation of piezo electric composite materials, Piezo electricity is the ability of some materials to generate an electric field or electric potential in response to applied mechanical stress.And it isreversible in piezoelectric materials.This property can be reflected in the constitutive relations as(More)