A Crowd Equivalence-Based Massive Member Model Generation Method for Crowd Science Simulations

Abstract

Crowd phenomena are widespread in human society, but they cannot be observed easily in the real world, and research on them cannot follow traditional ways. Simulation is one of the most effective means to support studies about crowd phenomena. As modelbased scientific activities, crowd science simulations take extra efforts on member models, which reflect individuals who own characteristics such as heterogeneity, large scale, and multiplicate connections. Unfortunately, collecting enormous members is difficult in reality. How to generate tremendous crowd equivalent member models according to real members is an urgent problem to be solved. A crowd equivalence-based massive member model generation method is proposed. Member model generation is accomplished according to the following steps. The first step is the member metamodel definition, which provides patterns and member model data elements for member model definition. The second step is member model definition, which defines types, quantities, and attributes of member models for member model generation. The third step is crowd network definition and generation, which defines and generates an equivalent large-scale crowd network according to the numerical characteristics of existing networks. On the basis of the structure of the large-scale crowd network, connections among member models are well established and regarded as social relationships among real members. The last step is member model generation. Based on the previous steps, it generates types, attributes, and connections among member models. According to the quality-time model of crowd intelligence level measurement, a crowd-oriented equivalence for crowd networks is derived on the basis of numerical characteristics. A massive member model generation tool is developed according to the proposed method. The member models generated by this tool possess multiplicate connections and attributes, which satisfy the requirements of crowd science simulations well. The member model generation method based on crowd equivalence is verified through simulations. A simulation tool is developed to generate massive member models to support crowd science simulations and crowd science studies. KEYWORDSsimulation; member model generation; crowd equivalence; crowd network C rowd phenomena are widespread in human society; as the saying goes, "Two heads are better than one." However, in the Internet era, crowd phenomena have become more common and complex than before. Given the particularity and complexity of crowd phenomena in the Internet era, most research results cannot be observed in the real world; crowd science studies cannot follow common ways. Simulation is one of the most effective means to research and verify crowd phenomena. On the one hand, crowd science simulations combine existing simulation methods with data-driven models and put forward new theories and methods. On the other hand, crowd science simulations can resolve given problems at reasonable costs, reduce system uncertainties and anomalies in early stages...

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