Texture features analysis on micro-structure of paste backfill based on image analysis technology

Yin, Shenghua; Shao, Yajian; Wu, Aixiang; Wang, Yiming; Gao, Zhiyong

doi:10.1007/s11771-018-3920-7

Cited by 16 publications

(7 citation statements)

References 36 publications

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“…The image obtained by scanning electron microscope is a gray image, which can clearly distinguish the distribution of pores and soil particles between soils [35]. The magnification ratios in this study were 2000× and 5000×.…”

Section: Sem Image Processingmentioning

confidence: 71%

Strength and freeze-thaw cycle resistance of cement stabilized coastal clay mixed with shell powder

Liu

Wang

2023

Mater. Res. Express

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To study the effect of marine shell powder (SP) on the mechanical properties of cement solidified coastal clay (CSC), unconfined compressive strength test, freeze-thaw cycle test and Scanning Electron Microscope test were conducted on the stabilized soil. The results show that SP could improve the mechanical properties of CSC to some extent. When the SP content was 15%, the strength of CSC was the highest. Moreover, under the condition of freeze-thaw cycle, SP can enhance the compactness of coastal cement-clay, which shows that the pore area decreases by 7.2% during 7 freeze-thaw cycles. Finally, a mathematical empirical model of the unconfined compressive strength, SP content and freeze-thaw cycles of coastal cement-clay modified by seashell powder (SPCSC) specimens was established. The model has a good relevance with the investigated data, which can give a theoretical foundation for improving the performance of coastal cement-clay using seashell powder under different environments.

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Section: Sem Image Processingmentioning

confidence: 71%

Strength and freeze-thaw cycle resistance of cement stabilized coastal clay mixed with shell powder

Liu

Wang

2023

Mater. Res. Express

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“…In other studies, the microvessel density and vascular endothelial growth factor in tumors tumor diameter 5 cm GIST were higher than those tumor diameter < 5 cm. 27,28 All these factors may lead to GI bleeding in GIST patients with tumor diameter 5 cm.…”

Section: Discussionmentioning

confidence: 99%

Prognostic Value of Bleeding in Gastrointestinal Stromal Tumors: A Meta-Analysis

Fan

Sun

et al. 2021

Technol Cancer Res Treat

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Background: Gastrointestinal bleeding is the most common clinical manifestation of gastrointestinal stromal tumor. It is of great significance to the prognosis of patients. But the results are controversial. The purpose of this study was to evaluate the relationship between gastrointestinal bleeding and clinical prognosis in patients with GIST. Methods: A systematic literature search was performed in Pumbed, Cochrane Library, EMBASE, ClinicalTrials.gov , CNKI, VIP and wanfang databases with the pattern of unlimited languages. 12 studies with 2781 individuals were included in the final analysis. The overall survival (OS), recurrence-free survival/disease-free survival (RFS/DFS) and related factors affecting bleeding in patients with gastrointestinal stromal tumor (GIST) were extracted. Hazard ratio (HR) and 95% confidence interval (CI) were used for in the meta-analysis. Results: A total of 12 articles were included in the study, including 2781 patients with GIST, including 845 patients with gastrointestinal bleeding. The OS of GIST patients with gastrointestinal bleeding was significantly worse (HR = 2.54, 95% CI = 1.13-5.73, P = 0.025). But there was no significant difference in RFS between gastrointestinal bleeding patients and non-bleeding patients (HR = 1.35, 95% CI = 0.70-2.61, P = 0.371). Further analysis of the related factors of GI bleeding in GIST patients was observed, besides the aging factor (HR = 1.02, 95% CI = 0.69-1.50, P = 0.929), Small intestinal stromal tumor (HR = 0.56, 95% CI = 0.41-0.76, P < 0.001), tumor diameter ≥ 5 cm (HR = 2.09, 95% CI = 1.20-3.63, P = 0.009), Mitotic index ≥ 5/50 HPF (HR = 1.66, 95% CI = 1.11-2.49, P = 0.014) and tumor rupture (HR = 2.04, 95% CI = 1.0-3.82, P = 0.026) all increased the risk of GI bleeding in patients with GIST. Conclusions: The OS of GIST patients with GI bleeding was worse than non-GI bleeding, but had no significant effect on RFS. Nevertheless the aging factor, the location of GIST in the small intestine, tumor diameter ≥ 5 cm, Mitotic index ≥ 5/50 HPF and tumor rupture all increased the risk of GI bleeding in patients with GIST.

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“…Leaching occurred due to atmospheric precipitation and surface runoff. The fine clay minerals and complex amorphous gels of Al, Si, and Fe in the ancient lateritic weathering crust materials accumulated on the highlands surrounding the karst depressions were transported to nearby shallow lagoons under the protection of humic acid [76], forming the ironstone layer in the iron-stone-bauxite-claystone structure of the Jiujialu Formation.…”

Section: Ore-forming Process Of Bauxitementioning

confidence: 99%

Effect of Karst Geomorphology on the Sedimentary Mineralization and Geochemical Distribution of Bauxite: An Example from the Xiaoyuan Area in Qingzhen, Guizhou Province

Yang

Luo

et al. 2023

Minerals

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Bauxite, in central Guizhou, is predominantly karst bauxite, but there is insufficient research on the effect of karst paleogeomorphology on bauxite development. Xiaoyuan bauxite is also a karst bauxite, and high- and low-iron bauxite deposits exist in the study area. This study conducts geological modeling of karst bauxite using controlled-source audio-frequency magnetotelluric (CSAMT) data and drill core data. The effects of karst paleogeomorphology on bauxite deposition and mineralization are evaluated by assessing karst paleogeomorphology, conducting a mineralogical analysis of drill cores at different locations, and determining the geochemical distribution characteristics of the elements in the horizontal and vertical directions. Combined with previous research results, we propose two metallogenic processes of high-iron and low-iron bauxite. The findings are significant for understanding the mechanism of bauxite formation.

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Texture features analysis on micro-structure of paste backfill based on image analysis technology

Cited by 16 publications

References 36 publications

Strength and freeze-thaw cycle resistance of cement stabilized coastal clay mixed with shell powder

Strength and freeze-thaw cycle resistance of cement stabilized coastal clay mixed with shell powder

Prognostic Value of Bleeding in Gastrointestinal Stromal Tumors: A Meta-Analysis

Effect of Karst Geomorphology on the Sedimentary Mineralization and Geochemical Distribution of Bauxite: An Example from the Xiaoyuan Area in Qingzhen, Guizhou Province

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