本文基于Hyland元话语理论,以《中国日报》和《纽约时报》关于新冠疫情公共危机的报道为语料,运用分析工具UAM Corpus Tool 3.0进行对比分析,总结其元话语特征,并据此对当前中西方主流媒体关于公共危机话语互动式元话语的特征进行解析...本文基于Hyland元话语理论,以《中国日报》和《纽约时报》关于新冠疫情公共危机的报道为语料,运用分析工具UAM Corpus Tool 3.0进行对比分析,总结其元话语特征,并据此对当前中西方主流媒体关于公共危机话语互动式元话语的特征进行解析。从元话语的总体分布来看,《纽约时报》公共危机话语互动式元话语的使用频次远高于《中国日报》公共危机话语互动式元话语,表明互动式元话语在西方主流媒体的公共危机话语中较为广泛的运用。中西方主流媒体公共危机话语均频繁使用介入标记语,较少使用态度标记语,使公众参与到自己的话语中,形成良好的人际关系,塑造说话者在听众心目中的形象,提高领导者在公众心目中的可信度。此外,模糊语,增强语、自我提及语在《中国日报》和《纽约时报》中的使用存在显著性差异,说明中西方主流媒体公共危机话语作为较权威的话语,均呈现出建议、呼吁、拉近距离的特点,用词准确,旨在公平公正地陈述客观事实,全面有效地化解危机。展开更多
A model suitable for describing the mechanical response of thin elastic objects is proposed to simulate the deformation of guide wires in minimally invasive interventions. The main objective of this simulation is to p...A model suitable for describing the mechanical response of thin elastic objects is proposed to simulate the deformation of guide wires in minimally invasive interventions. The main objective of this simulation is to provide doctors an opportunity to rehearse the surgery and select an optimal operation plan before the real surgery. In this model the guide wire is discretized with the multi-body representation and its elastic energy derivate from elastic theory is a polynomial function of the nodal displacements. The vascular structure is represented by a tetrahedron mesh extended from the triangular mesh of the artery, which can be extracted from the patient＇s CT image data. The model applies the energy decline process of the conjugate gradient method to the deformation simulation of the guide wire. Experimental results show that the polynomial relationship between elastic energy and nodal displacements tremendously simplifies the evaluation of the conjugate gradient method and significantly improves the model＇s efficiency. Compared with models depending on an explicit scheme for evaluation, the new model is not only non-conditionally stable but also more efficient. The model can be applied to the real-time simulation of guide wire in a vascular structure.展开更多
文摘本文基于Hyland元话语理论,以《中国日报》和《纽约时报》关于新冠疫情公共危机的报道为语料,运用分析工具UAM Corpus Tool 3.0进行对比分析,总结其元话语特征,并据此对当前中西方主流媒体关于公共危机话语互动式元话语的特征进行解析。从元话语的总体分布来看,《纽约时报》公共危机话语互动式元话语的使用频次远高于《中国日报》公共危机话语互动式元话语,表明互动式元话语在西方主流媒体的公共危机话语中较为广泛的运用。中西方主流媒体公共危机话语均频繁使用介入标记语,较少使用态度标记语,使公众参与到自己的话语中,形成良好的人际关系,塑造说话者在听众心目中的形象,提高领导者在公众心目中的可信度。此外,模糊语,增强语、自我提及语在《中国日报》和《纽约时报》中的使用存在显著性差异,说明中西方主流媒体公共危机话语作为较权威的话语,均呈现出建议、呼吁、拉近距离的特点,用词准确,旨在公平公正地陈述客观事实,全面有效地化解危机。
文摘A model suitable for describing the mechanical response of thin elastic objects is proposed to simulate the deformation of guide wires in minimally invasive interventions. The main objective of this simulation is to provide doctors an opportunity to rehearse the surgery and select an optimal operation plan before the real surgery. In this model the guide wire is discretized with the multi-body representation and its elastic energy derivate from elastic theory is a polynomial function of the nodal displacements. The vascular structure is represented by a tetrahedron mesh extended from the triangular mesh of the artery, which can be extracted from the patient＇s CT image data. The model applies the energy decline process of the conjugate gradient method to the deformation simulation of the guide wire. Experimental results show that the polynomial relationship between elastic energy and nodal displacements tremendously simplifies the evaluation of the conjugate gradient method and significantly improves the model＇s efficiency. Compared with models depending on an explicit scheme for evaluation, the new model is not only non-conditionally stable but also more efficient. The model can be applied to the real-time simulation of guide wire in a vascular structure.
