Experimental Investigation on Ablation Characteristic of EPDM Insulator in Different Gas Environments

Some ablation experiments of Ethylene-Propylene-Diene Monomer(EPDM)insulator were carried out in quasi-static low temperature gas environment,gas-phase environment,two-phase environment with Al2O3 grain and high concentration Al2O3 grain gas environments.Their charring ablation rate,thickness,surface morphology and main ingredient of the charring layer were analyzed.The experiment results show that the main influent factors for the charring ablation rate are the gas temperature,grain concentration and state of grain impact;the main influent factors for the charring layer thickness are the gas velocity and environment pressure;and the process of SiO2 migrating in the charring layer occur commonly in different gas environments.They provide a foundation for the ablation mechanism research and modeling of EPDM insulator.

A Brief Talk on Environmental Experience Graphic Design in the Construction of Characteristic Tourism From Signage Design

With the continuous development of the national economy and the improvement of the design industry,the wayfinding system has gradually been accepted and valued by the public,and the research on the wayfinding system of the public environment has become more and more in-depth.In recent years,the research on the wayfinding system has begun to develop into the integration of human culture and cultural implantation in the environment,forming a new visual system design concept,Environment Graphic Design.With the deepening of research,environmental graphic design has once again developed and deepened,studying the detailed experience of people in the environment and presenting it in the form of graphic design.That is,Experience Graphic Design.This article will discuss the application of environmental graphic experience design in the construction of characteristic tourism from the perspective of signage design.

“Interface-element-perception”model to evaluation of urban sidewalk visual landscape in the core area of Beijing

This study investigates the relationship between sidewalk space and pedestrians,as well as how the design and improvement of sidewalk visual landscapes can enhance pedestrians’psychological restoration.Sidewalk quality in China varies,making it challenging to meet the urban residents’expectations for sidewalk environments.In this research,psychological perception experiments were conducted on 60 sidewalks in the core functional area of Beijing.The visual landscape of the sidewalk was divided into four dimensions:canopy,ground plane,roadside plane,and building wall.In this study,a total of 52 spatial elements were extracted and evaluated based on the dimensions of fascination,being-away,coherence,and scope in relation to pedestrians’psychological perception.The findings confirm that urban greenery and street accessibility,among other spatial elements,significantly positively influence pedestrians’willingness to walk.Furthermore,a balanced distribution of elements within sidewalk space can better enhance pedestrians’psychological restoration capabilities.