课程文献中心 更多>>

关键词： 塑料模   CAD   教学改革   实践能力   创新能力  

摘要： 针对应用型本科塑料模CAD教学中存在的问题,提出了一系列教学改革措施,通过优化教学内容、融合多种教学方法、构建多元评价体系,探索以能力培养为导向的教学模式。研究表明,改革后的教学模式能有效提高学生的实践能力、创新能力和综合素质,为培养高素质应用型模具设计人才提供新的思路和方法。

关键词： Computational modeling   Geometry approximation   Inverse problem   Mass diffusivity   Shrimp preservation  

摘要： Shrimp is a highly perishable and economically important seafood, making effective drying methods essential for preservation. Current shrimp drying models typically fall into two categories: high-fidelity 3D simulations with high computational cost, and analytical models using simplified shrimp geometry, both of which typically neglect product shrinkage. This study introduces a novel modeling approach which represents shrimp as a shrinkable, spherically symmetric object with a fractal dimension. The method was applied to analyze mass transfer (MT) during convective drying of pre-cooked shrimp at 70, 80, and 90 °C, both with and without dry salting pretreatment. The fractal dimension was determined by matching drying behavior to that predicted by a detailed 3D CAD model. A value of 2.38 was obtained, falling between that of an infinite cylinder (2) and a cylinder with equal height and diameter (2.63). For untreated shrimp, moisture-averaged effective diffusivities (accounting for shrinkage) were estimated using the 3D CAD model as 4.86, 5.40, and 7.04 (×10⁻¹⁰) m²/s at 70, 80, and 90°C, respectively. Dry-salted shrimp showed slightly lower values: 4.78, 5.21, and 6.31 (×10⁻¹⁰) m²/s under the same conditions; however, these differences were not statistically significant ($p>0.05$). The fractal object approach yielded diffusivity estimates that did not differ significantly from those obtained with the 3D CAD model ($p>0.05$). These findings indicate that the fractal object-based model can effectively approximate complex-shaped foods like shrimp for drying analysis and the estimation of MT properties.

关键词： 高性能纺织品设计   枕巾   抗菌功能   应用   发展  

摘要： 高性能纺织品设计依靠先进材料以及结构优化,切实提升了枕巾的抗菌性能,更有力地保障使用者健康。此设计融合无机抗菌剂与天然抗菌剂,运用浸渍和接枝等方法,达成对微生物的长效抑制。枕巾作为床上用品,其设计格外重视亲肤性与耐久性,在实际应用中呈现出广阔市场潜力。这种设计解决了传统纺织品的卫生不足问题,还借助技术融合促使功能升级。在发展进程中,感应技术与可持续材料相结合,推动纺织品朝着智能化、可持续方向转变。本文深入研究该设计在枕巾抗菌方面的作用,揭示其对家居卫生的重要贡献,为行业发展提供参考。

关键词： Aircraft parts dataset   Aircraft variety classification   Predict aircraft parts type   Computer vision   Artificial intelligence   Convolutional neural network   Aerospace science  

摘要： This study presents a data collection using CAD image-based deep learning and machine learning models to classify forming tool types for aircraft parts. Focusing on sheet metal components i.e. which constitute a substantial portion of aircraft structures and are often produced via fluid-cell hydroforming, this dataset uses visual information embedded in CAD images, particularly flange geometries, to classify tool types without requiring physical prototypes or specialized sensors. A dataset was built from publicly available CAD models (sourced from Zenodo) and additional models generated in CATIA, resulting in 12,432 images across three visualization modes (Normal, Hidden Line, and Wireframe) and multiple orientations. Images were categorized into six tool types based on the flange configuration. Several convolutional neural network architectures and machine learning models were evaluated to validate their classification performance on the dataset. ResNeXt achieved the highest accuracy of 96% on Normal View with Wireframe View. ResNeXt was evaluated with accuracy and F1-score to address class imbalance.. This scalable, cost-effective, and readily applicable CAD image-based deep learning and machine learning model for classifying aircraft parts will significantly help people who want to propose similar solutions for small-batch, multi-variety manufacturing environments.

关键词： CABG   coronary artery bypass grafting   CAD   coronary artery disease   CBC   complete blood count   DES   drug-eluting stent   DNL   de novo lesion   ISR   in-stent restenosis   MER   monocyte-to-eosinophil ratio   MLR   monocyte-to-lymphocyte ratio   MNR   monocyte-to-neutrophil ratio   PCI   percutaneous coronary intervention   Inflammation   Monocytes   Percutaneous coronary intervention   Drug-eluting stent   In-stent restenosis  

摘要： Inflammation plays a key role in the progression and instability of coronary atherosclerosis. Monocytes and their ratios with eosinophils and lymphocytes serve as valuable markers for assessing inflammation. We explored blood monocyte levels and their related ratios in patients undergoing percutaneous coronary intervention (PCI) for in-stent restenosis (ISR) or significant de novo lesions (DNL).

摘要： In the last 20 years, invisible orthodontic appliances have undergone a significant paradigm shift, revolutionising the way orthodontic treatment is delivered. Previously, metal braces were the traditional mode of treatment, which were visible and often uncomfortable. However, advancements in orthodontic technology have led to the development of invisible orthodontic appliances including lingual appliances and aligners, which are designed to be virtually invisible and more comfortable for patients. in 2024, the emergence of Direct 3D printed aligners has become a new hot topic. The biomechanics and indications are different in these appliances and we have to be aware of the limitations in each appliances. Dr. Lee will discuss his vast experiences in lingual appliances, and the creation of a new Direct 3D printed aligner system Seoulalign, with illustration of clinical cases about the various options in treating our everyday orthodontic patients.

关键词： 心理应激   牙周炎   微循环   激光散斑   微循环障碍  

摘要： 目的探讨心理应激对大鼠实验性牙周炎组织微循环的影响。方法选取SD雄性大鼠64只,随机分为对照组(C组)、实验性牙周炎组(CP组)、心理应激组(PS组)、实验性牙周炎+心理应激组(CPPS组),每组16只。通过丝线结扎法构建实验性牙周炎模型,束缚应激法建立大鼠心理应激模型。实验结束后,采用旷场实验观察动物行为学改变,ELISA法检测大鼠血清中的激素水平,Micro-CT和苏木精-伊红染色观察大鼠牙周炎组织形态,透射电镜观察牙周炎组织的血管超微结构变化,伊文思蓝染色及激光散斑成像技术分别评估牙周炎组织的血管通透性及血流灌注情况。结果与C组和CP组比较,给予束缚应激3周后,PS组和CPPS组大鼠焦虑样行为显著增加(P<0.05),血清中皮质酮和促肾上腺皮质激素水平显著升高(P<0.05)。与C组相比,CP组和CPPS组大鼠牙槽嵴顶到釉牙骨质界距离和附着丧失量显著增加(P<0.05)。血管的超微结构中,CP组的牙龈组织血管内皮细胞形态不规则,胞质内细胞器损伤,基膜不连续或血管内皮细胞增生多见,而CPPS组血管的超微结构损伤加重。CP组牙周组织的血管通透性和牙龈血流灌注量亦显著增加(P<0.05),且CPPS组大鼠上述指标与CP组比较存在统计学差异(P<0.05)。结论心理应激可以通过破坏血管超微结构、增加通透性及异常血流灌注,加剧牙周炎微循环障碍,进而促进组织破坏。

关键词： 职业教育改革   零部件测绘   CAD成图   岗课赛证   混合教学  

摘要： 本文针对中职学校《零部件测绘与CAD成图技术》课程存在的教学案例中选用的零件单一、三维建模训练不足、技能培养碎片化等问题,构建了“岗课赛证融通”的一体化课程体系。通过DACUM职业分析法重构课程内容,划分为基础、进阶、综合三大递进模块,配套开发AR交互式学习资源和在线教学平台实现“测绘-建模-装配-出图”全流程能力培养。

关键词： Female breast cancer   CAM   Biographical disruption   Biographical continuity   Qualitative study   England  

摘要： Breast cancer patients frequently use complementary and alternative medicine (CAM) alongside biomedical treatment for symptom relief and to address the disruption caused by diagnosis and treatment. These experiences, however, are often overlooked within the cancer clinical encounter. This study explored CAM use in women with breast cancer, focusing on three main research questions: Why do women with breast cancer use CAM? In what ways does CAM help them maintain or regain a sense of normality? What barriers or tensions do they face when considering or using CAM?

关键词： 致敏染料   致癌染料   纺织品   HPLC-MS/MS  

摘要： 建立了一种测定纺织品中可提取致敏染料与致癌染料含量的高效液相色谱-串联质谱(HPLC-MS/MS)方法。纺织品样品经吡啶-水(体积比1∶1)溶液加热提取,提取液经0.22μm聚四氟乙烯(PTFE)滤膜过滤并稀释后进样分析,外标法定量。结果表明:各染料在1.5~60.0 mg/kg质量分数范围内线性良好,相关系数R2>0.995;在2种基质中进行3个浓度水平的加标回收试验,回收率为60%~112%,相对标准偏差RSD<15%(n=6),方法定量限为0.5~3.6 mg/kg。该方法灵敏度高、结果准确,适用于纺织品中相关有害染料的日常检测。