In order to evaluate the effectiveness of air quality assurance measures during the 2022 Beijing Winter Olympic Games and the Winter Paralympic Games, samples of atmospheric particulates in Weifang City during the 2022 Winter Olympic Games and the Winter Paralympic Games were collected to analyze the level of air pollution during the Winter Olympic Games and the Winter Paralympic Games. The computer-controlled scanning electron microscopy and energy spectrum system (CCSEM-EDX) was used to analyze the morphology characteristics of particulates, the type and quantity proportion of particulates, and the quantity-particle size distribution of particulates. The results show that the air quality during the 2022 Winter Olympic Games and the Winter Paralympic Games is better than that in the same historical period of 2020 and 2021, the control measures are effective.

Due to diastrophism, tide action and human activities, the coastline is always in flux. There are lots of coral islands in the south sea of China. Remote sensing survey for the coastline not only can reassert the necessity and importance of coral protection, but also can provide basic data and scientific basis for island ecologic protection, reasonable utilization of land resources. The study area named Zhao Shu Island lies in Jintong Islands of Xisha. It is a coral island which has people inhabited. Using WorldView-2 satellite remote sensing images as data sources we carry out three phases of coastline investigation and monitoring. The satellite data phases are 2002, 2010 and 2013. Firstly, affirm the bands valuable for color composition on the basis of spectral and correlation analysis. Then extract the coastline by a series of image process, such as image correction, fusion, waterline extraction and coastline revision. Finally determine the coastline types and length by artificial interpretation. The results show that the island length is gradually smaller, which means the island area is reducing. The beach bedrock coast in northern island was eroded seriously especially during the period between 2010 and 2013. In addition, the shoal head shape in the western island changed a lot.