搜索到51748篇“ MICROSCOPE“的相关文章
光学显微镜在纺织纤维检验中的应用研究
2024年
相比于扫描电子显微镜,光学显微镜具有操作简单、鉴别快速、价格便宜的优点,目前已广泛应用于纺织纤维检验。然而,目前只有普通光学显微镜被应用于纺织纤维的检测标准。尽管其他光学显微成像方法在纺织纤维的检测中具有一定优势,却仍未受到行业的广泛重视。本文旨在介绍不同类型光学显微镜的原理、构造以及其在纺织纤维检测中的应用,并对光学显微镜在纺织纤维检测领域中的潜在应用进行了展望,从而让这些仪器能更好地服务于纺织纤维生产和检测领域,助推我国纺织行业的高质量发展。
潘行星
关键词:光学显微镜偏光显微镜荧光显微镜
Constructing Electron Microscope Labs: Challenges and Solutions
2024年
The construction of advanced laboratories for precision instruments, such as electron microscopes, involves unique challenges that are influenced by the specific environmental conditions required for optimal functionality. These include mitigating interference from magnetic fields and vibrations, which are critical for maintaining the precision and accuracy of the instruments used. This study aims to offer enhanced project management strategies and detailed construction solutions that address the environmental and technical needs specific to electron microscopy labs, thereby facilitating effective lab operations and extending the lifecycle of high-end precision instruments. Case studies of existing laboratory constructions, onsite investigations, and comprehensive reviews of the technical and environmental requirements provide the basis for a best practice for constructing sophisticated electron microscopy labs. The approach integrates both pre-construction planning and post-construction adjustments to create optimal operational environments. The findings suggest that successful lab constructions are those that incorporate thorough onsite assessments, strategic location choices, and the use of advanced construction materials and techniques specifically designed to counteract environmental challenges like magnetic and vibration interferences. Actionable guidelines for both planning and executing the construction of electron microscope labs highlighted in this tutorial are intended as an important resource to troubleshoot or upgrade existing lab facilities and to consult in preparation of future lab construction projects.
Limei ChaMarkus Walkling-RibeiroZhenxi GuoYaron KauffmanConstance Van Horne
关键词:MANAGEMENTVIBRATION
原子力显微镜-扫描电子显微镜共定位表征系统的研发与应用
2024年
微纳加工过程中,常有样品需要进行聚焦离子束(FIB)溅射、切割,扫描电子显微镜(SEM)以及原子力显微镜(AFM)表征,而这三类仪器都需要将样品固定在样品台上才可测试,固定不佳会影响表征结果.但固定好的样品在不同仪器之间转移、拆卸、再固定的过程中极易受到破坏.基于以上问题,设计了AFM-SEM-FIB样品共定位系统,可实现样品在此三种仪器之间的无损转移及共定位,避免珍贵样品破坏及目标丢失,以及解决AFM扫描无法控制方向、迅速调整位点等问题.在微纳表征中有优异的表现,系统已被开发成产品并量产销售.
蔡蕊万鹏徐强吕天明孙智广
关键词:原子力显微镜扫描电子显微镜聚焦离子束
裸眼2D显微镜与光学显微镜在后牙树脂直接充填术中应用比较
2024年
目的 探讨裸眼2D显微镜在后牙树脂直接充填术中的应用价值,为临床提供参考.方法 对纳入于口腔牙体牙髓病科行后牙树脂直接充填术的65例患者进行回顾性研究,患者分成两组,光学显微镜组33例,裸眼2D显微镜组32例.比较两组充填修复操作时长、充填体边缘密合性及医生评价得分,评估临床中使用裸眼2D显微镜的可行性.结果 光学显微镜组平均处理每颗牙齿所需的时间为(23.06±4.12)min;裸眼2D显微镜组为(26.97±3.64)min,差异具有统计学意义(P<0.05).术后即刻检查两组充填体的边缘密合情况,边缘密合性的成功率均达到100%.裸眼2D显微镜在术者姿势、视觉疲劳、操作难易方面的得分高于光学显微镜组,差异有统计学意义(P<0.05).结论 裸眼2D显微镜可用于后牙树脂直接充填修复治疗,在临床效果方面可与传统光学显微镜相媲美,且在人体工程学和操作空间位置等方面具有一定的独特优势,提示其具有广泛临床使用的潜力.
郑梓婷曾宇婷闫文娟
关键词:光学显微镜
无相互作用自由空间电子光学与量子电子显微镜
2024年
本文围绕着生物等敏感样品的高分辨透射电子显微成像展开,从电子显微成像等方面论述了透射电子显微镜在敏感样品领域的发展,重点介绍了基于无相互作用测量(IFM)的量子电子相干成像机理,分析了自由空间电子光学中电子IFM对耦合相干电子源和耦合电子传输的要求,量子机制和电子显微镜相结合建立的量子电子显微镜能够从本质上解决高能电子辐照对生物等敏感样品的损伤,将成为敏感样品高分辨无损检测发展史上的里程碑。
赵利荣崔益民彭腾飞李文萍
关键词:透射电子显微镜
Non-invasive imaging of pathological scars using a portable handheld two-photon microscope被引量:1
2024年
Background:Pathological scars are a disorder that can lead to various cosmetic,psychological,and functional problems,and no effective assessment methods are currently available.Assessment and treatment of pathological scars are based on cutaneous manifestations.A two-photon microscope(TPM)with the potential for real-time non-invasive assessment may help determine the under-surface pathophysiological conditions in vivo.This study used a portable handheld TPM to image epidermal cells and dermal collagen structures in pathological scars and normal skin in vivo to evaluate the effectiveness of treatment in scar patients.Methods:Fifteen patients with pathological scars and three healthy controls were recruited.Imaging was performed using a portable handheld TPM.Five indexes were extracted from two dimensional(2D)and three dimensional(3D)perspectives,including collagen depth,dermo-epidermal junction(DEJ)contour ratio,thickness,orientation,and occupation(proportion of collagen fibers in the field of view)of collagen.Two depth-dependent indexes were computed through the 3D second harmonic generation image and three morphology-related indexes from the 2D images.We assessed index differences between scar and normal skin and changes before and after treatment.Results:Pathological scars and normal skin differed markedly regarding the epidermal morphological structure and the spectral characteristics of collagen fibers.Five indexes were employed to distinguish between normal skin and scar tissue.Statistically significant differences were found in average depth(t=9.917,P<0.001),thickness(t=4.037,P<0.001),occupation(t=2.169,P<0.050),orientation of collagen(t=3.669,P<0.001),and the DEJ contour ratio(t=5.105,P<0.001).Conclusions:Use of portable handheld TPM can distinguish collagen from skin tissues;thus,it is more suitable for scar imaging than reflectance confocal microscopy.Thus,a TPM may be an auxiliary tool for scar treatment selection and assessing treatment efficacy.
Yang HanYuxuan SunFeili YangQingwu LiuWenmin FeiWenzhuo QiuJunjie WangLinshuang LiXuejun ZhangAimin WangYong Cui
关键词:SCARS
Characterization of the current crowding effect on chip surface using a quantum wide-field microscope
2024年
We characterize the current crowding effect for microwave radiation on a chip surface based on a quantum wide-field microscope combining a wide-field reconstruction technique. A swept microwave signal with the power of 0–30 d Bm is supplied to a dumbbell-shaped microstrip antenna, and the significant differences in microwave magnetic-field amplitudes attributed to the current crowding effect are experimentally observed in a 2.20 mm ×1.22 mm imaging area. The normalized microwave magnetic-field amplitude along the horizontal geometrical center of the image area further demonstrates the feasibility of the characterization of the current crowding effect. The experiments indicate the proposal can be qualified for the characterization of the anomalous area of the radio-frequency chip surface.
Rui ZhaoDing WangHuan Fei WenYunbo ShiJun TangJun Liu
Three-dimensional morphological and fluorescent imaging of zebrafish with a continuous-rotational light-sheet microscope
2024年
Light-sheet fluorescence microscopy(LSFM)has been widely used to image the three-dimensional(3D)structures and functions of various millimeter-size bio-specimen such as zebrafish.However,the sample adsorption and scattering cause shading of the light-sheet illumination,preventing the even 3D image of thick samples.Herein,we report a continuous-rotational light-sheet microscope(CR-LSM)that enables simultaneous 3D bright-field and fluorescence imaging.With a high-accuracy rotational stage,CR-LSM records the outline projections and the fluorescent images of the sample at multiple rotation angles.Then,3D morphology and fluorescent structure were reconstructed with a developed algorithm.Using CR-LSM,zebrafish’s whole-fish contour and blood vessel structures were obtained simultaneously.
Dongmin ZhangGuang YangYao TanChong ChenJie ZhangHui Li
关键词:MORPHOLOGY
耳内镜与显微镜在镫骨手术中的应用分析被引量:1
2024年
目的:比较耳内镜和显微镜在各种类型的镫骨手术中的应用特点。方法:分析2020年4月—2023年5月在解放军总医院第六医学中心耳鼻咽喉头颈外科完成的镫骨手术共59台次。通过统计学分析比较耳内镜组与显微镜组在术后听力、术后住院时间、换药次数等方面有无区别。分析因面神经遮窗不能植入人工镫骨的病例,比较2种手术方式的优缺点。结果:2组患者以耳硬化症为主,其中耳内镜组有1耳(1/23)为中耳畸形,显微镜组有5耳为中耳畸形(5/36),还有2耳为Van Der Hover综合征和4耳为Treacher Collins综合征。耳内镜组10耳(43.5%)术后气骨导差(ABG)≤10 dB,21耳(91.3%)术后ABG≤20 dB。显微镜组13耳(41.9%)术后ABG≤10 dB,28耳(90.3%)术后ABG≤20 dB,2组差异无统计学意义(P>0.05)。耳内镜组术后的复查次数较显微镜组少(P<0.01)。所有患者术后均未出现面瘫、鼓膜穿孔,未出现重度感音神经性听力下降。结论:对于术前评估镫骨畸形不严重、术中磨骨不多的患者,耳内镜手术较显微镜手术更具有优势,可以减少患者的术后复查次数。对于外耳道狭窄、中耳畸形程度较重的患者,显微镜提供的双手操作环境更利于手术顺利进行。
刘娅王辉兵赵丹珩朱玉华王方园贾建平王瑾侯昭晖
关键词:耳内镜显微镜镫骨中耳畸形听力
用于扫描隧道显微镜的低噪声前置电流放大器
2024年
前置电流放大器是扫描隧道显微镜的重要部件之一,其性能对于扫描隧道显微镜系统的基本操作及新功能开发至关重要.本文详细分析了影响前置电流放大器性能的因素,通过筛选噪声极低的运放芯片和电路结构优化,设计了一款针对扫描隧道显微镜系统的前置电流放大器.该放大器最灵敏档位(1 GΩ)的噪声低至4 fA/(Hz)1/2,带宽为2.3 kHz,具有10 MΩ,100 MΩ和1 GΩ三个测量量程并且可以通过控制信号实现自动切换,测量范围覆盖pA—μA量级的隧穿电流.利用该前置电流放大器展示了扫描隧道显微镜系统的主要功能,包括表面形貌表征、扫描隧道谱测量以及原子搬运,并探索了隧穿电流中散粒噪声的测量.通过散粒噪声随隧穿电流的变化关系,得到隧穿结中散粒噪声的法诺因子约等于1,验证了简单金属隧穿结中电子隧穿满足泊松过程,为表面电子关联体系的高精度表征提供了基础.
唐海涛米壮王文宇唐向前叶霞单欣岩陆兴华
关键词:扫描隧道显微镜散粒噪声

相关作者

王海宁
作品数:3被引量:21H指数:1
供职机构:空军工程大学防空反导学院
研究主题:PIM 无源互调 MICROSCOPE IM HPM
梁建刚
作品数:122被引量:222H指数:8
供职机构:空军工程大学
研究主题:宽带 圆极化 微带天线 天线设计 小型化
张晨新
作品数:111被引量:273H指数:9
供职机构:空军工程大学
研究主题:分形 复合左右手传输线 RCS 雷达散射截面 小型化
胡正海
作品数:362被引量:3,508H指数:32
供职机构:西北大学生命科学学院
研究主题:发育 组织化学 超微结构 花蜜腺 解剖学
周利
作品数:12被引量:17H指数:2
供职机构:四川剑南春(集团)有限责任公司
研究主题:宏基因组学 剑南春 浓香型白酒 酿酒酵母 细菌多样性