钢筋腐蚀监测传感器设计与工程应用

基于钢筋腐蚀体积膨胀及光纤光栅测量应变的原理,设计了一种新型钢筋腐蚀监测传感器.通过室内加速腐蚀试验,建立了传感器信号与钢筋腐蚀率的定量关系;采用多目标优化方法,进行钢筋腐蚀传感器的优化布置.将该传感器埋入某码头泊位混凝土结构中并进行了测试,室内试验和工程应用表明,该传感器可用于混凝土中钢筋腐蚀监测.     

钢渣与污泥协同资源化研究进展

钢渣和污泥作为传统大宗固体废弃物,始终面临处理成本高、回收利用率低等问题,但其内部含有大量可利用物质,具有较高的资源化利用价值,现已成为国内外的研究热点。为了提高钢渣与污泥绿色、高效、协同资源化利用,综述了近年来国内外钢渣在建筑、道路、水处理、农业等领域资源化利用的研究进展,立足固废无害化、减量化,从钢渣和污泥的资源化进行分析与总结,指出不同研究方法的特点和优劣,为固废资源化利用提供参考。并基于我国发展现状对钢渣与污泥资源化利用的未来发展方向进行了展望,以期为固废处理行业的良性发展提供一定的理论支撑。     

强韧支架用丝素蛋白基生物墨水及其3D打印支架模拟软件的开发

At present, the existing scaffold materials cannot well meet the high strength and toughness requirements for the repairing of typical stressed tissues. And the commercial software for 3D printing scaffold modeling and mechanical performance simulation is complex to operate and has poor interoperability with 3D printers. In order to solve these problems, a silk fibroin (SF) based bio-ink was prepared for tough scaffold, and a software was developed for compression performance simulation of 3D printing scaffold based on SF and finite element analysis strategy. The printability of the bio-ink and the mechanical properties of the corresponding hydrogels and 3D printing scaffolds were characterized. The cell compatibility of the related scaffolds was evaluated by using fibroblasts and living/dead staining kit. Based on the SF based bio-ink, scaffolds with different heights and porosities were designed and printed. By using the developed software and the universal testing machine, the compression performance of related scaffolds was simulated and tested separately, and further compared with each other. Results show that the SF based bio-ink has good printability. And the 3D printing scaffold prepared by this ink presents high strength and toughness (modulus of elasticity: (1.86 ± 0.28)MPa, modulus of compression: (1.95 ± 0.11)MPa, elongation at break: (114.03 ± 14.40)%, compression strain ≥ 70%). In addition, the scaffold has good cell compatibility (L929 cell viability≥92.4%), which is expected to be used for the repair and regeneration of stressed tissues. The software is easy to operate, and can be used not only for the modeling of 3D printing scaffolds, but also for accurately predicting their compressive mechanical properties. In addition, the model data can also be directly imported into the 3D printer to guide the efficient preparation of the corresponding 3D printing scaffolds. This research is expected to provide important guidance for the rapid design and fabrication of tissue specific 3D printing scaffolds with bionic structure and mechanical properties. © Eco-Vector, 2023. All rights reserved.     

碳酸二苯酯中微量杂质的高效液相色谱分析

碳酸二苯酯和双酚A产生酯交换和缩聚反应,制得聚碳酸酯.聚碳酸酯耐压、透明性好,在机械制造、电子电器、军事及照明工业.安全与医疗器械等许多方面有着广泛的用途,是一种性能优良的工程塑料.聚碳酸酯的色泽与许多因素有关.由于原料碳酸二苯酯在制造过程中,一些沸点与之相近的杂质极易残留在产品里.要想得到高质量的聚碳酸酯,必须使其每一种杂质含量控制在100μg/g以下.至今未见报道同时检测碳酸二苯酯中3种微量杂质的分析方法.因此,本文结合单位工艺研究建立了一种用液相色谱进行分析的方法.     

催化光度法测定水中痕量的α-萘胺

在Ｈ２ＳＯ４介质中,α－萘胺能减弱碘对亚砷酸与硫酸铈氧化还原反应的催化作用,研究了其动力学条件,建立了测定痕量α－萘胺的催化动力学光度分析方法。     

一种平行透视下的三维拾取方法

提出一种“针刺取点”的三维拾取方法,介绍了在平行透视模型中,将二维点输入设备在屏幕坐标系下得到的二维屏幕坐标,反算成其在物体坐标系下真实的空间三维价值的方法及其实现。相比于OpenGL所带的以机制,本方法精度高、适用性强,而且容易实现。     

虚拟内窥镜中心路径抽取技术

目的在空腔器官中提取一条最佳的用于虚拟内窥镜漫游的中心路径。方法采用基于距离变换的方法进行路径抽取。结果给出了虚拟内窥镜中心路径的定义，总结了中心路径的基本特性。结论在虚拟人脑内窥镜系统中实现了中心路径的提取，用于器官内窥检查，效果良好。     

新疆开垦河流域水文特性分析

开垦河流域是天山北麓东坡诸小河区中的最大河流,特殊的地形构造使开垦河流域成为天山北坡的一个高降水量地带。采用开垦河水文站46年水文资料,利用水文统计从气候、径流、洪水、泥沙、水质等方面分析了流域水文特性的变化,为合理开发提供依据。     

中国女篮“赶超世界”应解决的几个问题

中国女篮在八十年代两次跻身到世界之强,实现了“冲出亚洲、走向世界”的战略目标.然而正当人们踌躇满志、期待女篮向更高目标冲击时,中国女篮在世界性的竞争中却出现了滑坡,由坡峰跌入谷底,本文运用采访、观看比赛和文献资料统计方法,对这种现象进行了分析研究,笔者认为,中国女篮要想在第25届巴塞罗那奥运会上取得好成绩,重新进入世界之强,就必须解决贯彻“以小打大”的训练指导思想、遵循“三从一大”的训练原则和攻守平衡规律,努力提高心理素质.