Results 81 to 90 of about 3,532 (182)
Gaoya dianqi, 2007 采用双组分胶对SF6气体绝缘电力设备的气体泄漏进行封堵,研究了采用无机纳米填料粘接剂实现气体绝缘设备在0.3～0.6 MPa压力下的带压堵漏,封堵工艺过程简单,适用于现场操作。另外通过红外激光成像技术检测了封堵前后被堵部位的泄漏状况。结合包扎法卤素定量检测,研究了封堵后长期泄漏封堵状况,研究表明,采用笔者研制的封堵材料和相关的封堵工艺,可以实现气体绝缘设备气体泄漏的良好封堵。
姚明 +4 more
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Dianci bileiqi, 2005 针对现有绝缘子泄漏电流检测方法存在的局限性,开发了一种基于U SB接口的便携式绝缘子泄漏电流检测系统。该系统运用了现代信息处理技术,并采用高性能的非接触电流传感器,最终取得了良好的效果。实验室的应用证实,该系统的设计比较成功,是一套研究绝缘子泄漏电流的有效工具。
肖立, 姚陈果, 孙才新, 陈攀
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Stress related properties of GaN based semiconductor heterostructures [PDF]
, 2008 GaN基半导体作为光电子材料领域极为重要的材料，其异质结构在器件开发领域得到十分广泛的应用。本文通过实验研究和计算模拟，考察研究了GaN基半导体异质结构中界面和表面的应力相关特性。运用高分辨率x射线衍射技术获得了6周期AlxGa1-xN/GaN超晶格结构中的应变，层厚及组分信息。采用对界面和表面变化敏感的掠入射x射线反射谱技术和原子力显微镜表面形貌技术深入研究了该超晶格结构的界面和表面平整度与垒层组分及阱层宽度的关系。研究发现，低Al组分阱宽小的样品界面与表面的平整度最好 ...
王元樟
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Effect of core wettability on seepage characteristics during CO2 saline aquifer sequestration process [PDF]
To clarify the influence of core wettability on the seepage process during the CO2 saline aquifer storage, this paper studies the influence of wettability change in the saline aquifer on the seepage process based on the pore-level seepage model combined ...
Fusheng XUE +4 more
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Research Progress in Target Recognition Methods for Security Computed Tomography Images [PDF]
Researching target recognition methods for 3D computed tomography (CT) images is important for improving the reliability and stability of the security inspection quality in advanced security CT scanning equipment.
Li ZHANG, Yunchao WEI, Yunda SUN
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Dianci bileiqi, 1989 本文介绍一种金属氧化物避雷器进行在线监测,即不断开接地线检测的泄漏电流测试仪.这种仪器是一种钳式电流互感器,通过带通滤波器及放大器测量三次谐波以检测泄漏电流长期变化情况,可以区分总泄漏电流及阻性电流.现场监测表明 ...
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宫颈液基薄层细胞学检测(TCT)联合阴道镜在筛查宫颈癌前病变中的价值
Zhongguo shiyan zhenduanxue, 2013 目的探讨宫颈液基薄层细胞学检测(Thinprep cytologic test,TCT)联合阴道镜在筛查宫颈癌前病变中的诊断价值。方法选择2006年6月至2011年7月在本院妇科门诊采用TCT和阴道镜检查筛查宫颈癌前病变的患者982例,同时在阴道镜下对患者宫颈进行多位点活检送病理检查。以组织病理学检查为金标准,分析TCT和阴道镜在筛查宫颈癌前病变中的诊断价值。结果在982例妇女中,TCT细胞学检查出异常者有118例,对诊断宫颈上皮内瘤样变(CIN)的特异性为96.5%,敏感性为58.6%,漏诊率为6.4%
李秀, 杨姗姗, 安然
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Internal Thread Defect Detection Based on Spherical Catadioptric Imaging and YOLOv7 [PDF]
Nuts are crucial components in mechanical manufacturing, where the quality of their internal threads significantly impacts mechanical connections. This study proposes a non-contact defect detection method for the internal threads of nuts using an image ...
Shijing ZHANG, Xutao MO, Xing ZHAO, Yanglin DONG
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Zhongguo shiyan zhenduanxue, 2014 目的探讨血清稀释与否对乙型肝炎核心抗体检测结果的影响。方法 ELISA作为初步检测法,配合电化学发光法检测乙肝五项和FQ-PCR检测HBV-DNA。结果稀释血清与原倍血清在检测乙型肝炎核心抗体的结果中存在不同。原倍血清HBcAb呈阳性,而稀释血清HBcAb呈阴性的有64例,占总标本的4.0%。经FQ-PCR检测稀释血清发现,其中2例标本HBV-DNA测定值>1.00×103copies/mL,判定为漏检,故ELISA稀释法检测HBcAb漏检率为3.1%。结论 ELISA稀释法检测低浓度的HBcAb ...
张碧莹, 邢延芳, 王珍珠, 耿丹
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Lightweight blasthole image detection and positioning method [PDF]
In blasting operations within rock tunnel excavation faces, the current practice of manual explosive charging or robotic arm operation by experienced personnel struggles to ensure both operational effectiveness and safety.
Qingyu JIN +4 more
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