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摘要： For implant-supported restorations, the contour of their emergence profile is influenced by the implant’s proximity to the neighboring bone and tooth roots. Long-term function and esthetics depend on the surrounding soft tissue having access to an adequate blood supply. A protocol involving immediate implant placement and interim restoration placement can provide a more functional emergence profile and more effectively meet patients’ esthetic expectations, with the restoration's emergence profile closely resembling that of a natural tooth. This article describes a method of creating the emergence profile by integrating artificial intelligence (AI) tooth segmentation and the mirror image feature of a computer-aided design (CAD) software program into the process.

关键词： PCB   电路CAD   5E   项目驱动   教学模式  

摘要： 为满足电子信息专业PCB设计人才的培养目标,总结了传统“电路CAD”课程教学中存在的弊端,分析“5E”和项目驱动式教学模式的特点,提出融合“5E”及项目驱动式的电路CAD课程教学模式。将课程内容以项目驱动式的形式融入“5E”教学模式中,以具体情境吸引学生兴趣,激发学生自主探究欲望;为培养学生语言表达能力,在设计成果展示环节中,学生总结设计过程中习得的知识点并以PPT形式进行汇报;设置迁移阶段,培养学生学以致用和自主创新能力;基于多样化的评价机制考核学生的学习效果,形成一套以学生为中心、自主探究的融合式教学模式。以51精简版最小系统项目为例,介绍了融合式教学模式的实施方法。总结近三年期末考核成绩分布情况,说明该模式教学效果良好,对于类似课程具有一定的推广应用价值。

关键词： 智能防螨测试仪   纺织品   防螨性能   精确度  

摘要： 为了解决传统纺织品防螨性能检测方法主观性强、结果一致性差及现行标准部分条款可操作性不足等问题,本试验系统研究智能防螨测试仪在纺织品防螨检测中的应用效果。以粉尘螨为试验对象,通过设备计数稳定性与准确性评估、自动识别准确率分析、与传统体视显微镜法重现性对比及实验室间对比,从多维度验证智能防螨测试仪的应用价值。结果表明:智能防螨测试仪平均识别准确率达87.5%,相对标准偏差(RSD)为5.4%,计数稳定性良好;相较于传统体视显微镜法(相对极差平均值49.0%),其计数相对极差平均值为6.6%,重现性显著提升;3家实验室间比对结果显示,所有样品检测|z|值均小于等于2,相对极差和RSD均低于10%,防螨效果差异不超过2级,满足实验室间比对要求。研究证实,智能防螨测试仪可有效降低人为主观误差,提升检测结果的精准度与一致性,为纺织品防螨性能智能化检测提供可靠技术支撑,具有良好的行业推广前景。

关键词： Crassulacean acid metabolism (CAM)   Gas exchange   Kalanchoë fedtschenkoi   Light quality   Malate decarboxylation   Malate remobilisation   Stomatal conductance  

摘要： During the light period, crassulacean acid metabolism (CAM) plants remobilise malic acid from the vacuole and decarboxylate it to supply CO₂ for Rubisco behind closed stomata. Whilst it has been well documented that diurnal deacidification depends strongly on light availability, the impact of light quality on daytime leaf gas exchange and deacidification remains poorly understood. The obligate CAM model species Kalanchoë fedtschenkoi was subjected to either different monochromatic wavelengths (blue, green, red) or modified full-spectrum (white) light spectra with a particular waveband omitted (blue, orange, red, far-red, blue+red). Leaf gas exchange parameters and different biochemical parameters associated with diurnal deacidification [i.e., malate and starch content, in vitro activities of malic enzyme (ME), pyruvate orthophosphate dikinase (PPDK), and Rubisco] were measured at dawn, midday, and late afternoon. Under high light intensities of 300 µmol m⁻² s⁻¹, blue wavelengths were found to be a key determinant in promoting high daytime stomatal conductance (Phases II and IV), resulting in improved C₃ carboxylation. Furthermore, omitting red wavelengths from the light spectrum led to a substantially higher overall diel CO₂ uptake (+300 %) compared to plants subjected to spectra lacking either blue or both blue and red wavelengths. In contrast to the large impact on leaf gas exchange, light spectral composition had only a minor impact on diurnal changes in intrinsic enzyme activities of NAD(P)-ME, PPDK, and Rubisco. Consistent with these observations, the diurnal malate degradation and starch accumulation rates were remarkably similar under different spectral compositions. Our findings reveal that stomatal behavior and gas exchange are primarily influenced by light quality, with a more pronounced role for blue compared to red wavelengths. The core biochemical events associated with diurnal dea

关键词： HET-CAM test   Moisturizing creams   Ocular irritation   Sunscreen creams  

摘要： Cosmetic products applied around the eyes, such as moisturizing and sunscreen creams, can come into contact with the conjunctiva, potentially causing irritation due to the thinness of the ocular epithelium. These products, widely used by the general population, remain in contact with the skin for extended periods. In this study, 41 cosmetic creams marketed in Algeria (moisturizers and sunscreens) were evaluated using the Hen's Egg Test on the Chorioallantoic Membrane (HET-CAM), an alternative to the Draize test. The results showed that 36.6 % of the tested creams induced irritation, with varying degrees of severity. Moisturizing creams were more frequently associated with irritation (44.0 %) compared to sunscreens (25.0 %). Among products intended for children, 44.4 % elicited an irritation response, and 60 % of irritating products carried the precautionary statement “avoid contact with eyes.” These findings provide the first data on the ocular irritation potential of cosmetic creams available in the Algerian market and contribute to regional safety assessment by identifying specific product categories with irritant potential.

关键词： CAD技术   机械制图技术   技术融合   设计效率  

摘要： 鉴于机械设计需求日趋复杂,且传统制图方式效率低下,二维手工制图及单一CAD(计算机辅助设计)操作模式已无法满足多维度设计协同需求。首先,探究了CAD技术与机械制图技术的核心关联——二者分别代表数字化工具与工程语言规范,共同搭建起机械设计完整的技术链条。其次,从3个层面论证了二者的融合价值,一是借助参数化建模与视图自动生成功能,大幅提升了设计效率与精度;二是依托电子图纸存储及版本控制技术,实现了图纸的数字化管理;三是凭借智能算法与模型联动,推动机械设计朝智能化方向迈进。最后,制定了4项有效措施,最终实现了设计流程高效化、图纸管理规范化及技术应用智能化的目标。

关键词： Acute ischemic stroke   Clinical outcomes   Inductively coupled plasma mass spectrometry   Intracranial thrombus   Large vessel occlusion   Mechanical thrombectomy   Toxic metals   ACA   Anterior Cerebral Artery   AIS   Acute Ischemic Stroke   Al   Aluminum   ASPECTS   Alberta Stroke Program Early CT Score   BA   Basilar Artery   CAD   Coronary Artery Disease   Cd   Cadmium   CE   Cardioembolism   CVD   Cerebrovascular Disease   CT   Computed Tomography   CTA   Computed Tomography Angiography   DAB   3,3′-Diaminobenzidine   EDTA   Ethylenediaminetetraacetic Acid   ESUS   Embolic Stroke of Undetermined Source   FFPE   Formalin-Fixed, Paraffin-Embedded   FPR   First-Pass Recanalization   Hg   Mercury   HRP   Horseradish Peroxidase   ICA   Internal Carotid Artery   ICP-MS   Inductively Coupled Plasma–Mass Spectrometry   LAA   Large-Artery Atherosclerosis   LVO   Large Vessel Occlusion   MCA   Middle Cerebral Artery   MT   Mechanical Thrombectomy   NCCT   Non-Contrast Computed Tomography   Ni   Nickel   NIHSS   National Institutes of Health Stroke Scale   Pb   Lead   PBS   Phosphate-Buffered Saline   PCA   Posterior Cerebral Artery   ROS   Reactive Oxygen Species   TIA   Transient Ischemic Attack   TOAST   Trial of Org 10 172 in Acute Stroke Treatment   UD   Undefined   μg/g   Micrograms per Gram   μg/L   Micrograms per Liter  

摘要： Acute ischemic stroke caused by intracranial large vessel occlusion is associated with significant morbidity and mortality. Emerging evidence suggests that environmental exposures, including toxic metals, may be associated with cerebrovascular disease. However, the presence of toxic metals within intracranial thrombi and their relationship with clinical features of acute ischemic stroke remain largely unexplored.

关键词： 电弧防护纺织品   模拟测试系统   高温等离子体   热防护性能   性能评估   阻燃织物  

摘要： 为解决传统电弧测试方法存在的成本高、危险性大、重复性差等问题,文章创新开发了一套基于高温等离子体技术的电弧防护纺织品模拟测试系统。该系统采用模块化设计,集成测试支架、高温等离子体喷枪、精密样品固定装置、线性马达驱动的时间控制模块及多参数数据采集系统。通过对多种电弧防护织物的系统测试,文章深入分析其在模拟电弧环境下的热防护性能和损伤演化规律。结果表明,该测试系统能准确模拟电弧热效应,实现对各类型电弧防护纺织品性能的快速、安全和可重复评估,测试重复性偏差控制在5%以内,设备成本降低约60%,以期为电弧防护纺织品的研发和质量控制提供有效的技术平台。