针对当前去雾算法效率不高、细节恢复较差等问题,提出一种改进多尺度AOD-Net(all in one dehazing network)的去雾算法。通过增加注意力机制、调整网络结构和改变损失函数这3方面的改进,增强网络的特征提取和恢复能力。模型的第1层增加...针对当前去雾算法效率不高、细节恢复较差等问题,提出一种改进多尺度AOD-Net(all in one dehazing network)的去雾算法。通过增加注意力机制、调整网络结构和改变损失函数这3方面的改进,增强网络的特征提取和恢复能力。模型的第1层增加空间金字塔注意力(spatial pyramid attention,SPA)机制,使网络在特征提取过程中避免冗余信息。将网络改成拉普拉斯金字塔型结构,使模型能够提取不同尺度的特征,保留特征图的高频信息。使用多尺度结构相似性(multi-scale structural similarity,MS-SSIM)+L1损失函数替换原有的损失函数,提高模型保留结构的能力。实验结果表明,本方法去雾效果更好,细节更丰富。在定性可视化评价方面,去雾图像效果优于原网络。在定量评估层面,与原网络相比PSNR值提升了2.55 dB,SSIM值提升了0.04,IE熵值增加了0.18,这些数值指标充分验证了本算法的出色去雾效果和稳定性。展开更多
A slurry-phase carbonation technique was utilized,employing argon oxygen decarburization slag(AOD slag)as a source of calcium and MgCl_(2) as a regulator for the crystal morphology of acicular aragonite.Subsequently,t...A slurry-phase carbonation technique was utilized,employing argon oxygen decarburization slag(AOD slag)as a source of calcium and MgCl_(2) as a regulator for the crystal morphology of acicular aragonite.Subsequently,the carbonated AOD slag,enriched with acicular aragonite,was employed in fabricating composite cementitious materials,followed by an analysis of their evolution in hydration heat,hydration products,and microscopic morphology.Additionally,it delved into the mechanism through which acicular aragonite enhances the stength of composite cementitious materials.Moreover,advanced simulation software for engineering and sciences(ABAQUS)was utilized to simulate the compressive performance of composite mortar with varying dosages of acicular aragonite.The findings demonstrate that the carbonated AOD slag,containing 83.4%acicular aragonite(with an average aspect ratio of 21.31),exhibited commendable compatibility with cement.Moderate integration of carbonated AOD slag facilitated the formation of calcium sulfoaluminate hydrate(AFt)phases.The acicular aragonite within the cementitious matrix showcased remarkable filling effects.As the dosage of carbonated AOD slag increased,flexural and compressive strengths of cement mortar initially rose before declining.Upon reaching a 6%cement inclusion of carbonated AOD slag,the various constituents of the cementitious material displayed optimal synergy.The numerical simulation results confirmed the experimental findings,demonstrating a favorable increase in compressive strength and flexural strength with the addition of acicular aragonite.The acicular aragonite strengthened the matrix by serving bridging and pull-out functions.展开更多
钢渣中钙含量较高,利用钢渣替代天然矿石作为钙源进行碳酸化反应固存CO_(2)是一种前景广阔的固废利用与碳减排方法。采用间接湿法碳酸化,不仅能显著提高固碳效率,还可实现制备高纯度、高附加值的碳酸钙产品。以AOD不锈钢渣(AOD渣)为材料...钢渣中钙含量较高,利用钢渣替代天然矿石作为钙源进行碳酸化反应固存CO_(2)是一种前景广阔的固废利用与碳减排方法。采用间接湿法碳酸化,不仅能显著提高固碳效率,还可实现制备高纯度、高附加值的碳酸钙产品。以AOD不锈钢渣(AOD渣)为材料,首先对其进行化学分析和矿相分析,确定其具有较高的固碳潜力;然后基于间接湿法加速碳酸化过程,探究AOD渣中钙的高效浸出规律,采用正交试验和单因素试验探究浸出温度、盐酸物质的量浓度、液固比和搅拌转速对钙浸出效率的影响;最后进行碳酸化反应并利用X射线衍射仪(XRD)、扫描电子显微镜(SEM-EDS)和热重分析仪(TG-DTG)研究钙离子转化率、碳酸钙纯度和微观形貌。试验结果表明,盐酸物质的量浓度和液固比是影响钢渣中钙浸出的主要因素;随着浸出反应进行,硅基团溶解生成的硅酸胶体会阻碍AOD渣内部元素进一步溶出;升温和提高酸浓度可有效消除硅酸胶体的影响,促进钙溶出。以1.5 mol/L盐酸为浸出剂,在85℃、液固比为50 m L/g、搅拌速度为600 r/min的浸出条件下,AOD渣中钙的浸出率可达90.51%,通过热重试验分析,经间接碳酸化后制备的CaCO_(3)产物纯度为96.04%,钙的转化率达到83.96%。研究结果可为利用钢渣钙碳酸化固碳并协同制备高附加值CaCO_(3)产物的冶金固废高效资源化利用提供试验和理论基础。展开更多
文摘针对当前去雾算法效率不高、细节恢复较差等问题,提出一种改进多尺度AOD-Net(all in one dehazing network)的去雾算法。通过增加注意力机制、调整网络结构和改变损失函数这3方面的改进,增强网络的特征提取和恢复能力。模型的第1层增加空间金字塔注意力(spatial pyramid attention,SPA)机制,使网络在特征提取过程中避免冗余信息。将网络改成拉普拉斯金字塔型结构,使模型能够提取不同尺度的特征,保留特征图的高频信息。使用多尺度结构相似性(multi-scale structural similarity,MS-SSIM)+L1损失函数替换原有的损失函数,提高模型保留结构的能力。实验结果表明,本方法去雾效果更好,细节更丰富。在定性可视化评价方面,去雾图像效果优于原网络。在定量评估层面,与原网络相比PSNR值提升了2.55 dB,SSIM值提升了0.04,IE熵值增加了0.18,这些数值指标充分验证了本算法的出色去雾效果和稳定性。
基金the financial support from Innovative Research Group Project of Natural Science Foundation of Hebei Province(No.E2022209093)Central Guidance Local Science and Technology Development Fund Project of Hebei Province(No.236Z3803G)+1 种基金Scientific and Technological Project of Tangshan(No.23130205E)Youth Teacher Pre Research Fund Project of the School of Metallurgy and Energy(No.YJY20244373).
文摘A slurry-phase carbonation technique was utilized,employing argon oxygen decarburization slag(AOD slag)as a source of calcium and MgCl_(2) as a regulator for the crystal morphology of acicular aragonite.Subsequently,the carbonated AOD slag,enriched with acicular aragonite,was employed in fabricating composite cementitious materials,followed by an analysis of their evolution in hydration heat,hydration products,and microscopic morphology.Additionally,it delved into the mechanism through which acicular aragonite enhances the stength of composite cementitious materials.Moreover,advanced simulation software for engineering and sciences(ABAQUS)was utilized to simulate the compressive performance of composite mortar with varying dosages of acicular aragonite.The findings demonstrate that the carbonated AOD slag,containing 83.4%acicular aragonite(with an average aspect ratio of 21.31),exhibited commendable compatibility with cement.Moderate integration of carbonated AOD slag facilitated the formation of calcium sulfoaluminate hydrate(AFt)phases.The acicular aragonite within the cementitious matrix showcased remarkable filling effects.As the dosage of carbonated AOD slag increased,flexural and compressive strengths of cement mortar initially rose before declining.Upon reaching a 6%cement inclusion of carbonated AOD slag,the various constituents of the cementitious material displayed optimal synergy.The numerical simulation results confirmed the experimental findings,demonstrating a favorable increase in compressive strength and flexural strength with the addition of acicular aragonite.The acicular aragonite strengthened the matrix by serving bridging and pull-out functions.
文摘钢渣中钙含量较高,利用钢渣替代天然矿石作为钙源进行碳酸化反应固存CO_(2)是一种前景广阔的固废利用与碳减排方法。采用间接湿法碳酸化,不仅能显著提高固碳效率,还可实现制备高纯度、高附加值的碳酸钙产品。以AOD不锈钢渣(AOD渣)为材料,首先对其进行化学分析和矿相分析,确定其具有较高的固碳潜力;然后基于间接湿法加速碳酸化过程,探究AOD渣中钙的高效浸出规律,采用正交试验和单因素试验探究浸出温度、盐酸物质的量浓度、液固比和搅拌转速对钙浸出效率的影响;最后进行碳酸化反应并利用X射线衍射仪(XRD)、扫描电子显微镜(SEM-EDS)和热重分析仪(TG-DTG)研究钙离子转化率、碳酸钙纯度和微观形貌。试验结果表明,盐酸物质的量浓度和液固比是影响钢渣中钙浸出的主要因素;随着浸出反应进行,硅基团溶解生成的硅酸胶体会阻碍AOD渣内部元素进一步溶出;升温和提高酸浓度可有效消除硅酸胶体的影响,促进钙溶出。以1.5 mol/L盐酸为浸出剂,在85℃、液固比为50 m L/g、搅拌速度为600 r/min的浸出条件下,AOD渣中钙的浸出率可达90.51%,通过热重试验分析,经间接碳酸化后制备的CaCO_(3)产物纯度为96.04%,钙的转化率达到83.96%。研究结果可为利用钢渣钙碳酸化固碳并协同制备高附加值CaCO_(3)产物的冶金固废高效资源化利用提供试验和理论基础。
