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您的检索式：作者名="Xiaozheng Du"
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| 1 | Modification of ADP extinguishing powder by siliconization in spray drying显示文摘Superfine spherical fire-extinguishing powder,ammonium dihydrogen phosphate(ADP,NH4H2PO4),was prepared by spray drying and modified in situ with methyl hydrogen silicone oil(MHSO)emulsion and the fluorinated surfactant FK-510.The influences of the MHSO mass ratio on the hydrophobicity,surface composition,surface morphology,dispersion and particle-size distribution of the NH4H2PO4 were studied,and the influence of the drying air temperature on the decomposition of the NH4H2PO4 was also researched.The results indicate that the MHSO and FK-510 congregate on the particle surfaces and then form a hydrophobic shell.This shell improves the particle hydrophobicity and leads to a fine dispersion of the particles.During the process of preparing the precursor solution,3 wt%(based on the weight of NH4H2PO4)was chosen as the optimum value of the MHSO mass ratio.During the spray drying,a low absolute humidity of the air should be maintained,and it is very important to keep the exit-air temperature below 100°C to avoid decomposition. | Xiaojing Zhang ZhigangShen Chujiang Cai Xiaozheng Yu Jun Du Yushan Xing Shulin Ma | 2012 | Particuology2012，10，4： | 2 |
| 2 | Reliability and consistency assessment of land cover products atmacro and local scales in typical cities显示文摘Urban areas have higher heterogeneity compared to natural areas,it is crucial to assessfine-resolution land cover products and discover how they differ in urban areas so that they can be efficiently used for various application scenarios.In this study,five typical cities in China were chosen as study areas to evaluate four commonly used 30 m land cover products:GLC_FCS30-2020,FROM-GLC30-2017,Globeland30-2020,and CLCD-2019.We analyzed the reliability of these four products using validation samples as well as by examining their area and spatial pattern consistency.Given the limitations of traditional accuracy assessments at the macro level,we added a local area evaluation to further examine the classification details in these products.The macro results indicated that four land cover products within urban areas have a similar overall accuracy,surpassing 76%,but there was a low consistency among them,ranging from 42.21%to 61.13%.The local accuracy assessment illustrated that GLC_FCS30-2020 and FROM-GLC30-2017 performed well in reflecting the intricate details of the city,however,the four products exhibited varying degrees of misclassifications and omissions.These phenomena suggest that more sophisticated algorithms are needed to consider urban particularities sincefine-resolution land cover products may fail to capture complex urban details. | Wenxi Shi Xiang Zhao Jiacheng Zhao Siqing Zhao Yinkun Guo Naijing Liu Na Sun Xiaozheng Du Mengmeng Sun | 2023 | International Journal of Digital Earth2023，16，1： | 0 |
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