课程文献中心 更多>>

关键词： 羊毛   蚕丝   植物染料   变色纺织品   姜黄   pH值指示  

摘要： 利用姜黄素类化合物在碱性溶液中的颜色变化特性,结合碱性对羊毛和蚕丝纤维的影响,开发了一种可用于指示洗涤剂碱度的植物姜黄染色织物标签。以羊毛和蚕丝为研究对象,考察了不同pH值的碱处理对纤维的损伤情况及染色织物的变色情况,并检验了其耐用性。结果表明:姜黄染色织物随环境碱性增强呈现出黄→橙→红→棕红的变色规律;当洗涤液pH值≥9时,羊毛和蚕丝纤维的损伤较为明显,染色织物颜色由黄色变为橙色或红色。因此可借助姜黄的酸碱变色效应,迅速直观地判断洗涤用水是否适用于蛋白质纤维。姜黄染色织物标签可循环使用,并可应用于蛋白质类纺织品的日常洗护。

摘要： In multidisciplinary treatments orthodontists are often required to bond brackets to teeth restored with temporary crowns (2). In recent years, highly cross-linked prefabricated polymethylmethacrylate (PMMA) resin blocks have been marketed for use in computer-aided design/manufacture (3). Thus, PMMA-based milled temporary restorations are particularly suitable for use in longer clinical services, such as interdisciplinary treatment strategies that involve an orthodontic phase. As they are industrially fabricated under standardized conditions, these CAD/CAM polymer materials exhibit improved mechanical and esthetic properties (4). Therefore, the aim of this study was to assess the strength of different resines the PMMA block.

摘要： Anemia hemolítica autoimune (AHAI) por anticorpos frios é uma patologia rara caracterizada pela presença de elevados níveis de autoanticorpos circulantes, na maioria da classe IgM que reagem em baixas temperaturas e permanecem reativos em temperaturas próximas a 30°C. Segundo recente Consenso Internacional de Anemia Hemolítica Auto Imune (Jäger U. et. al, Blood Rev. 2020 e Berentsen S. Front Immunol. 2020;) a Doença da aglutinina fria (CAD) foi definida como uma doença de etiologia linfoproliferativa, clonal de células B com produção de autoanticorpo da clase IgM, com especificidade anti-I ou i e capacidade de ativar a via do Complemento gerando hemólise intravascular. A investigação imuno-hematológica (IH) é caracterizada pelo teste da antiglobulina direto (TAD) fortemente positivo para o fragmento de complemento C3d e a presença de anticorpo da classe IgM no soro com um título da aglutinina ≥ 64 a 4°C; títulos de aglutinina fria inferiores normalmente não possuem relevância clínica. O TAD para IgG é geralmente negativo, mas pode ser fracamente positivo em até 20% dos pacientes. A Síndrome da aglutinina fria (CAS) foi caracterizada por uma condição transitória secundária causada por uma doença clinica associa a uma infecção bacteriana ou viral, como Mycoplasma pneumoniae ou vírus Epstein-Barr. CAS também pode ocorrer após certas doenças malignas e distúrbios autoimunes. A investigação IH se caracteriza pelo TAD (C3d) positivo e presença de IgM no soro com titulação da aglutinina fria menor que 64.

关键词： blood pressure   cardiovascular disease   guidelines   hypertension   ABPM   ambulatory BP monitoring   ACC   American College of Cardiology   AHA   American Heart Association   ASCVD   atherosclerotic cardiovascular disease   BP   CAD   coronary artery disease   CKD   chronic kidney disease   COR   Class of Recommendation   CVD   ESH   European Society of Hypertension   HBPM   home BP monitoring   LOE   level of evidence   SBP   systolic blood pressure  

摘要： Graphical Abstract

关键词： 现代纺织品   室内装饰   设计理念   人性化设计  

摘要： 随着科技进步和社会发展,人们对室内空间的美学要求和功能需求日益提高,促使纺织品在设计中的作用不断扩展和深化。文章对纺织品软装饰的概念、纺织品软装饰在室内设计中的应用特点、纺织品软装饰在室内设计中的作用、纺织品软装饰在室内设计中的应用原则、纺织品在室内装饰中的创新表现等方面进行了分析,以期更深入地掌握这些纺织品的独特性及其背后的文化含义,进而在设计实践中更准确地体现出设计理念和文化价值,为现代纺织品在室内装饰中的创新设计提供参考。

关键词： 电子束物理气相沉积   热障涂层   改性锆酸钆   热循环   界面分离  

摘要： (Yb_(0.1)Gd_(0.9))2Zr_(2)O_(7)(YbGdZrO)稀土复合氧化物是适用于更高温度的新型热障涂层(TBCs)候选材料之一。采用电子束物理气相沉积(EB-PVD)工艺在单晶合金(Ni,Pt)Al粘结层表面分别制备了单陶瓷层YbGdZrO和双陶瓷层YbGdZrO/YSZ两种热障涂层,并对涂层的相结构、化学组成、显微形貌和热循环行为进行了表征分析。结果表明:沉积态YbGdZrO陶瓷涂层的主相结构为单一的缺陷型萤石相,并有少量Yb_(2)O_(3)共存;与单陶瓷层涂层相比,双陶瓷层涂层的柱状晶簇较为纤细,且可观察到明显的柱状晶间隙;双陶瓷层涂层1100℃热循环寿命约为单陶瓷层涂层的1.5倍;经长期冷热交替循环后,单陶瓷层涂层内横向裂纹滋长,并扩展到YbGdZrO/TGO层界面上方几微米处,导致界面退化分离,且陶瓷层中的Yb元素内扩散进入TGO层;双陶瓷层涂层内出现纵向裂纹,而YbGdZrO/YSZ和YSZ/TGO层间界面基本完好;热循环失效后,单陶瓷层和双陶瓷层试样TGO层内均出现横向和纵向裂纹,甚至进一步诱发了层内断裂分离现象。

关键词： 功能整理   双光敏剂   光动力灭活   抗菌   涤纶织物  

摘要： 基于姜黄素与亚甲基蓝超分子组装机制的染整一体化工艺,成功制备了颜色可调、高效抗菌和耐久稳定的光动力抗菌医用涤纶织物。该光动力抗菌涤纶织物表现出优异的耐水洗色牢度和耐摩擦色牢度。双光敏剂的协同作用显著提升了其光动力学性能,并增强了抗菌效果。经30 min光照后,光动力抗菌涤纶织物对金黄葡萄球菌和大肠埃希菌的抑菌率分别达到99.31%和89.41%。此外,该光动力抗菌涤纶织物穿着舒适性优异,制备过程简便高效。

关键词： 针织物   平幅   前处理   白度   毛细效应  

摘要： 为了探讨精炼剂AIO 05在针织物平幅前处理中的应用,测试了精炼剂的性质,并通过小样试验进行优化。结果表明:精炼剂AIO 05具有良好的乳化性、耐碱性及低气泡性;加工纯棉针织物时,最佳工艺为:烧碱8g/L,精炼剂15g/L,双氧水15g/L,双氧水稳定剂3g/L,带液率100%,汽蒸温度102℃,汽蒸时间20min;加工涤/棉针织物时,最佳工艺为:烧碱4g/L,精炼剂5g/L,双氧水5g/L,双氧水稳定剂1g/L,带液率80%,汽蒸温度102℃,汽蒸时间10min。处理后织物的白度大于75%,毛细效应大于15cm,能够满足染色的要求。

关键词： rail defects detection   dense small object   ODCS-YOLO   ODConv   CAM   Soft-NMS  

摘要： To solve the problems of easy miss and false detection on rail surface defects caused by small size, dense target, and high similarity between features and background, this paper proposed an improved detection algorithm in complex background. First, the conventional convolution of YOLOv5 backbone network is replaced with omni-dimensional dynamic convolution (ODConv), which improves the feature extraction capability of the network without increasing the computational cost;second, to improve the model's performance in detecting tiny objects, a two-layer context augmentation module (CAM) is introduced into the path aggregation network (PAN) structure;finally, the traditional non-maximum suppression (NMS) algorithm is replaced by the Soft-NMS algorithm in the network post-processing to reduce the false-alarm and miss-rate. The experimental results on the Railway Track Fault Detection public dataset show that the OD-YOLO (OD stands for ODConv) and C-PAN (CAM module is introduced into PAN) structures could achieve better performance in the same type of improved algorithms;compared with the baseline algorithm YOLOv5, the ODCS-YOLO (OD stands for ODConv, C stands for CAM and S stands for Soft-NMS) algorithm improves the precision by 12.4%, the recall by 3.6%, the map50 by 8.6% and the GFLOPs is reduced by 0.6. Compared with seven classical object detection algorithms, the ODCS-YOLO algorithm achieves the highest detection accuracy, which makes it able to meet the real-time detection requirements of rail surface defects in real working conditions. The ODCS-YOLO model provides certain technical support for the defects detection and a new method for the detection of dense small objects.

关键词： 针织毛衫   经编织物   蕾丝   皮草   绒面   混搭风格  

摘要： 针织类服装以其舒适、柔软、款式多变的特性深受人们喜爱,但普通的毛衫外形较为简单,为消除毛衫中的单调感,通常采用混搭的方式来进行弥补。文中对针织毛衫设计中的混搭工艺进行研究,阐述针织毛衫的发展现状,通过分析应用于针织毛衫中的经编产品,以及这些经编产品在针织毛衫混搭设计中的应用形式和方法,为针织毛衫混搭风格设计和工业化生产提供理论和实践参考。