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关键词： T型   三维机织物   多综眼   多筋   预制体   角联锁结构  

摘要： 为了解决传统织机织造效率低下以及异型织物织造难度大的问题,设计了一种基于多综眼的纬向T型结构多筋机织物的织造工艺。通过研究整体T型结构机织物的成形技术,采用多层角联锁结构为基础,结合多综眼织机的特性,设计经向截面图并绘制纹版图,通过机织方法织造了梁高和基座厚度相同的纬向T型结构多筋机织物。结果表明:采用五综眼织机相较于单综眼织机织造效率提升了5倍,织造基于多综眼的纬向T型结构多筋机织物是可行的。

关键词： CAD   coronary artery disease   CFR   coronary flow reserve   CMD   coronary microvascular dysfunction   CMDR   Coronary Microvascular Disease Registry   IMR   index of microvascular resistance   Coronary microvascular dysfunction   Stable angina   Chest pain   Hemodynamic assessment   Ischemia non-obstructive coronary artery  

摘要： Coronary microvascular dysfunction (CMD) is an etiology for angina with non-obstructive coronary disease. However, the initial adoption of CMD assessment, whether planned or conducted ad hoc, is limited. We characterize planned and ad hoc CMD assessments and highlight evolving trends of a CMD referral center.

摘要： This in vitro study was aimed to evaluate the effect of coffee immersion and, toothbrushing and mouthwashing on the color stability and translucency of five different Cad-Cam ceramics.

关键词： 监督抽查   纺织品   常见问题   质量提升  

摘要： 市场监督管理部门依据产品质量监督抽查管理暂行办法对流通领域或生产领域的产品质量进行监督抽查,在产品质量监督抽查实施中发现监督抽查方案和细则理解不到位,抽样环节涉及抽样过程的规范性和样品的有效性以及抽样单填写细节、检验环节存在取样部位问题,报告环节存在判定和检验依据准确性等问题。总结分析纺织品领域监督抽查实际遇到的问题和解决方案,并结合案例分析阐述,从相关法律和抽查方案的培训学习、常见问题积累分享等方面提出监督抽查的应对对策和建议。

关键词： Class activation mapping   Clustering algorithm   Explainable artificial intelligence   Image classification  

摘要： Despite the tremendous success of convolutional neural networks (CNNs) in computer vision, the mechanism of CNNs still lacks clear interpretation. Currently, class activation mapping (CAM), a famous visualization technique to interpret CNN's decision, has drawn increasing attention. Gradient-based CAMs are efficient, while the performance is heavily affected by gradient vanishing and exploding. In contrast, gradient-free CAMs can avoid computing gradients to produce more understandable results. However, they are quite time-consuming because hundreds of forward interference per image are required. In this paper, we proposed Cluster-CAM, an effective and efficient gradient-free CNN interpretation algorithm. Cluster-CAM can significantly reduce the times of forward propagation by splitting the feature maps into clusters. Furthermore, we propose an artful strategy to forge a cognition-base map and cognition-scissors from clustered feature maps. The final salience heatmap will be produced by merging the above cognition maps. Qualitative results conspicuously show that Cluster-CAM can produce heatmaps where the highlighted regions match the human's cognition more precisely than existing CAMs. The quantitative evaluation further demonstrates the superiority of Cluster-CAM in both effectiveness and efficiency.

关键词： Dental restoration repair   Surface roughness   Surface Loss   Toothbrush wear  

摘要： The aim of the present study was to evaluate the influence of multidirectional brushing on the surface roughness, morphology, and bonding interface of resin-repaired CAD-CAM ceramic and composite restorations. Materials and methods: Twelve (N = 12) blocks (4 mm × 4 mm × 2 mm for parallel axis; 5 mm × 4 mm × 2 mm for perpendicular axis) of lithium disilicate glass-ceramic (IPS *** CAD, Ivoclar AG) and CAD-CAM resin composite (Tetric CAD, Ivoclar AG) were obtained and repaired with direct resin composite (Clearfil AP-X, Kuraray). An abrasive slurry was prepared and the brushing was performed according to each restorative material and axis of brushing (n = 6; perpendicular to repair interface and parallel to repair interface) during 3,650 cycles (240 strokes per minute) to simulate 3 years of brushing. The surface roughness (Ra) and the profile variation for each material (restoration and direct repair resin composite) were measured at the baseline condition and after brushing, and the mean roughness and presence of steps at the repair interface were evaluated through factorial analysis of Variance (ANOVA). Scanning Electron Microscopy (SEM) images were taken to evaluate the surface topography of the repaired materials after brushing.

摘要： In contemporary dental practice, the principle of tissue economy guides treatment decisions, especially when addressing deep carious lesions necessitating indirect restoration. Preserving pulp vitality is crucial to prevent prosthetic failures, making endodontic treatment a last resort. However, achieving pulp capping beneath minimally invasive restorations poses challenges. Biodentine emerges as a promising solution.

关键词： 耐光色牢度   纺织品检验   纤维种类  

摘要： 耐光色牢度是评价纺织品色牢度的重要指标,耐光色牢度的好坏直接关系着织物的外观,影响消费者的穿着和使用。研究纤维种类、面料颜色深浅和织物结构等对面料耐光色牢度的影响,对纺织品耐光色牢度的提升进行一些有益的探讨。

关键词： 纺织品   吸湿速干性   标准   检测   对比  

摘要： 为了理解和运用新标准,采用对比的方法,比较了GB/T 21655.1—2023和GB/T 21655.1—2008在术语和定义、试验程序以及评定和标识等方面的主要差异,针对在执行新标准时应注意的方面提出了建议。

关键词： 建筑CAD   混合教学   多元评价  

摘要： 文章在“互联网+教育”背景下针对现有“建筑CAD”课程教学模式中存在的问题,提出“建筑CAD”课程线上线下混合教学改革策略:建立符合课程特色的线上线下、理实一体化教学模式;学生在开始学习之前,应先复习前置课程并通过小测;将工匠精神、劳模精神融入课堂;通过创新教学方法、教学内容,建立多元评价体系和举办绘图技能月活动竞赛,确保较高的教学质量,使学生掌握企业所需的工作技能,并重点培养学生的问题解决能力和自主学习能力。线上线下混合教学可以推动学校实训场地更新,使培养的学生与企业无缝对接,克服传统教学模式弊端,对更有效地实现建筑类专业的人才培养目标具有较大现实意义。