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关键词： 湿敏智能面料   功能聚氨酯涂层   耐水洗性   响应高度   响应时间  

摘要： 针对目前吸湿排汗面料智能化不足和制备流程复杂等问题,以聚氨酯母粒、乙基纤维素及渗透剂JFC为原料,制备聚氨酯湿敏功能悬浊液,结合丝网印刷工艺并调节涂覆量,开发一种具有智能湿敏特性的功能机织面料。运用聚氨酯功能材料吸湿膨胀率高和涤纶机织面料吸湿膨胀率低的差异,实现湿敏功能面料遇湿自动鼓起响应、干燥自动恢复平整。系统分析面料透气性、水分蒸发速率、拉伸强度、耐水洗性及水洗后微观形貌等性能。结果表明:8层功能湿敏面料能随湿度变化迅速响应、响应高度高且耐水洗性能佳。

关键词： AI工程建模   CAD界面识别和理解   YOLO模型   深度学习  

摘要： 为了提高车辆设计的工程建模效率,通过AI自主完成工程建模流程,需研究解决车辆工业软件界面中图标的自动识别问题,文章提出了一种基于YOLO11s模型的图标检测方法。该方法构建包含75类图标的专用数据集,采用Ultralytics YOLO11s轻量化检测网络进行训练。模型输入图像的像素为640×640,训练轮数为200,采用GPU加速进行训练优化。试验结果显示,模型在测试集上的mAP@0.5检测精度为99.5%,准确率为99.91%,单张图像平均推理时间为6.1 ms,具备较高的检测精度和实时性。该方法可有效解决CAD图形界面的理解问题,适用于自动化操作中的界面元素识别任务,具有良好的工程实用性。相关模型已完成训练与部署,识别结果可用于辅助工业软件中的自动操作与流程控制。

关键词： Partially saturated soils   Cyclic loading   Hydro-mechanical modelling   Hydro-mechanical loading   Historiotropic surface  

摘要： Partially saturated soils are gaining prominence in geotechnical engineering and engineering geology, particularly in the context of extreme climate phenomena. Their intricate response to changing moisture conditions significantly impacts slope stability, foundation design, and infrastructure resilience against climate’s extreme phenomena in geotechnical engineering applications. Current constitutive models mainly focused on predicting monotonic hydro-mechanical (HM) processes, lacking accuracy in predicting soil behaviour under cyclic loading and moisture variations. However, infrastructures like railway tracks impose cyclic loading on the subsoil, while the soil undergoes seasonal moisture variations. This study aims to contribute to this topic by proposing a new HM constitutive model based on the Constitutive Anamnesis Model (CAM) for saturated soils, extending its application to partially saturated conditions. The original CAM effectively predicts the behaviour of fully saturated fine-grained soils under monotonic and cyclic loading, considering soil preloading history. By incorporating partial saturation effects, the extended model offers improved accuracy in simulating the behaviour of low and high plasticity clays under cyclic hydro-mechanical loading, providing a more comprehensive tool for geotechnical engineering applications.

关键词： Endodontically treated teeth   Endocrown   CAD/CAM   Deep margin elevation   Indirect restoration  

摘要： To evaluate the two-year clinical performance and survival rate of CAD/CAM-fabricated endocrowns with and without deep margin elevation (DME) in endodontically treated posterior teeth.

关键词： CAD/CAM   crown   digital   implant   screwmentable   workflow  

摘要： To evaluate the clinical efficacy, precision, and workflow efficiency of a fully digital protocol for restoring single dental implants using CAD/CAM-fabricated custom titanium abutments. The digital approach was analyzed in terms of prosthetic fit, time efficiency, patient outcomes, and dentist satisfaction compared to conventional methods.

关键词： Onlays   milling machine   dental material   trueness   adaptation  

摘要： To evaluate the marginal adaptation and margin trueness of lithium disilicate glass-ceramic (LDS) and glass-filler reinforced composite resin (CR) onlays fabricated using three different finish lines and two chairside CAM units (4- and 5-axis).

关键词： 机织物   蜂巢组织   计算机辅助设计   三维模拟  

摘要： 三维显示技术的普遍应用,为多层复杂组织的设计模拟提供了方便。不同组织织物的最终模拟效果与后期整理、原材料特性、织造工艺等因素有关,要得到完美一致的效果非常困难。为了解决这些问题,以蜂窝织物仿真实践为例,依据织物组织结构逻辑,分析织物效果的形成机理,并修正织物组织结构矩阵,逼真再现蜂巢组织织物。在此基础上,对变化蜂巢组织的织物模拟进行了探讨。实践结果表明:三维仿真可以方便模拟织物纱线的交织规律,逼真显示纱线的交织、密度、粗细、凹凸、正反面花型等效果,可以通过光线、镜头来调节观察方式,大大增强了辅助织物设计能力,提高了设计出样效率。

关键词： C-4-Crassulacean acid metabolism transition   C-4 photosynthesis   CO2 assimilation   malate   root morphology   Portulaca   salinity   drought  

摘要： Background and Aims Crassulacean acid metabolism (CAM) is a photosynthetic adaptation that improves plant survival under salinity and drought stress. Portulaca is one of the few genera capable of switching between C-4 and CAM photosynthesis, especially in response to drought. However, the physiological and root morphological responses during the C-4-CAM transitions under salinity remain poorly understood. Methods Here, we investigated CAM induction in the leaves of Portulaca grandiflora and Portulaca molokiniensis under salinity and drought conditions and evaluated their recovery after *** Results In P. grandiflora, CAM photosynthesis was induced within 1 week under high salinity and severe drought and after 1 week under moderate salinity and drought, as indicated by nocturnal increases in CO uptake, titratable acidity, phosphoenolpyruvate carboxylase activity and malate content. In P. molokiniensis, CAM induction occurred after 1 week under high salinity and severe drought, but was delayed 2 weeks in moderate salinity and drought conditions. Both species exhibited reduced CO2 uptake, chlorophyll fluorescence and protein content under stress. Portulaca grandiflora also exhibited pronounced day-night fluctuations in proline and malondialdehyde content, indicating greater oxidative stress, whereas P. molokiniensis was less affected. Root morphological changes in P. grandiflora were limited to severe drought, whereas P. molokiniensis responded to both high salinity and severe drought. After recovery, P. grandiflora reverted to C-4 photosynthesis within 1 week under drought and 2 weeks under salinity. Portulaca molokiniensis also returned to C-4 metabolism within 1 week of drought recovery and 2 weeks of salinity recovery. Conclusions These results demonstrate the timing, reversibility and species-specific plasticity of C-4-CAM transitions in Portulaca and provide insights into their adaptive strategies under abiotic stress and the potential resilience of C-4 pla