Phosphorus-doped silicon nanoparticles as high performance LIB negative electrode

Journal of Materials Science - Silicon is getting much attention as the promising next-generation negative electrode materials for lithium-ion batteries with the advantages of abundance, high...     

500 kV变压器事故油池的设计

事故油池作为室外主变压器的辅助设施,主要接收变压器发生泄漏故障时喷出的废油和废水.事故油池的设置可以避免对生态环境造成污染,同时也能防止变压器火灾事故的扩大.介绍了事故油池的设计过程,提出了一种事故油池油水分离的优化方案.     

Development of fan‐shaped tracker for single particle tracking

With the development of super‐resolution fluorescence microscopy, complex dynamic processes in living cells can be observed and recorded with unprecedented temporal and spatial resolution. Single particle tracking (SPT) is the most important step to explore the relationship between the spatio‐temporal dynamics of subcellular molecules and their functions. Although previous studies have developed SPT algorithms to quantitatively analyze particle dynamics in cell, traditional tracking methods have poor performance when dealing with intersecting trajectories. This can be attributed to two main reasons: (a) they do not have point compensation process for overlapping objects; (b) they use inefficient motion prediction models. In this paper, we present a novel fan‐shaped tracker (FsT) algorithm to reconstruct the trajectories of subcellular vesicles in living cells. We proposed a customized point compensation method for overlapping objects based on the fan‐shaped motion trend of the particles. Furthermore, we validated the performance of the FsT in both simulated time‐lapse movies with variable imaging quality and in real vesicle moving images. Meanwhile, we compared the performance of FsT with other five state‐of‐the‐art tracking algorithms by using commonly defined measures. The results showed that our FsT achieves better performance in high signal‐to‐noise ratio conditions and in tracking of overlapping objects. We anticipate that our FsT method will have vast applications in tracking of moving objects in cell.     

工艺参数对水性聚氨酯分散体性能的影响

以甲苯二异氰酸酯(TDI)、自制聚酯二元醇为主要原料合成了水性聚氨酯分散体(WPUD),研究了投料方式、反应温度和反应时间、中和方式、乳化温度等工艺参数对NCO含量及WPUD性能的影响.结果表明,采用两步投料法,第一步温度控制在65～70 ℃、反应1 h,第二步温度控制在70～75℃、反应3 h;采用前中和工艺、乳化时...     

定点定长度新型封孔工艺及工业性试验研究

针对现有封孔技术因封孔深度和封孔段长度相同,造成不能有效避开巷道松动圈、浪费封孔材料等现象的问题,在分析钻孔裂隙带形成的基础上,提出了封孔深度为8m、封孔段长度为3m的定点定长度新型封孔工艺。并在贵州山脚树矿进行了工业性试验,结果表明:定点定长度新型封孔工艺有效减少了钻孔漏气量,封孔成本降低40%,平均瓦斯抽采浓度提高了17.2%,单孔多抽出瓦斯911.9m3/min。     

基于边际Fisher深度自编码器的电台指纹特征提取*

针对在少量有标签样本条件下传统方法训练不充分而且难以准确提取通信电台指纹特征的问题,文中提出基于边际Fisher深度自编码器的电台指纹特征提取算法.以深度自编码器为基础,训练过程分为无监督预训练、基于边际Fisher映射的有监督训练两部分.首先挖掘海量无标签样本中包含的电台个体类别信息,用于深度自编码器最优参数训练.然后在有标签样本的辅助下对训练参数进行基于边际Fisher映射的有监督精校,提高指纹特征对同类型电台个体的鉴别能力.在多个通信电台数据集上进行的分类识别实验表明,文中算法能在小样本训练条件下有效表达同类型通信电台个体之间的差异.     

工程陶瓷磨削加工表面损伤图像检测

通过对工程陶瓷磨削加工试验得到的表面图像进行观察和分析,对表面损伤情况进行分类.运用计算机数字技术对表面图像进行图像增强、平滑去噪、中值滤波、细化等一系列的处理后,对加工表面所出现的微裂纹和脆断凹坑进行识别和提取,最后采用表面破碎率这个量化的指标来评价图像表面的损伤程度及其与加工参数的关系.     

规整填料单元内流场的三维LDV测量

引言 近二三十年,规整填料已广泛应用于反应、分离和混合等各类化工设备中,但对于规整填料内部流体流动规律的深入研究目前仍比较缺乏.以气液传质设备为例,规整填料塔内流体的流动分布会直接影响塔的传质性能,因此,国内外很多研究机构在这方面做了大量的研究,但绝大部分研究集中在宏观流动模型的建立及其实验验证方面[1-5].     

管内在线防垢及强化传热的实验研究

以饱和ＣａＣＯ３为物料，研究加热器管内移动弹簧的防垢，强化传热性能和结构参数及操作变量的相互影响。文中对防垢和强化传热的机理进行了探讨和实验研究，给出了强化传热和防垢的理论依据。     

铝电解槽阳极锥体掉块并形成裂缝的挽救

本文分析和论述了侧插自熔阳极铝电解槽阳极锥体产生大尺寸掉块并形成纵向裂缝的原因,对此种病态阳极提出了一种行之有效的挽救处理方法。