Results 101 to 110 of about 2,558 (149)
[Defect modification of calcium silicate and its application in oral bacteriostasis and tooth remineralization]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiHu Y +6 more
europepmc +1 more source
Gaoya dianqi局部放电检测技术是开关柜绝缘检测的有效手段之一。文中采用暂态地电压法、空气式超声波法、特高频法和红外热成像检测法对一起35 kV开关柜的绝缘缺陷进行检测，结合其放电图谱及特性判定开关柜母线室内发生多处沿面放电。通过开关柜停电解体检查发现，柜顶的散热铁丝网因盐雾腐蚀锈蚀严重，母线室内绝缘件表面附着的铁锈和盐分致使母线绝缘水平严重降低。为防止类似缺陷的发生，建议沿海地区的变电站应严控高压室室内环境，并常态化开展局部放电检测；在开关柜设计阶段，应增强柜体防盐雾腐蚀性能，且柜顶严禁设置直通式风道。
彭炜文 +5 more
doaj
Dianci bileiqi提出了一种基于红外热成像（IRT）图片的非接触式瓷绝缘子故障诊断方法，用于对架空电力绝缘子进行自动监测和视觉检查。首先采用最优阈值法对IRT图像中的重点区域进行分割。随后，从分割的重点区域中计算出各种几何、形态、强度和统计特征，作为XGBoost分类器的输入，最终利用图像处理技术和基于XGBoost的分类器模型开发出零值和低值绝缘子状态分类方法。研究表明，XGBoost分类器各项指标均为最优，精度（ACC）可达98.00%，真阳性率（TPR）为93.55%，而假阳性率（FPR）仅为1.49 ...
陈杰 +6 more
doaj
[Research progress on toxic shock syndrome due to group A <i>Streptococcus</i> infection in children]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiWang HY, Zhou W, Huang LS.
europepmc +1 more source
[Advances in application of cell imprinting technology in biomedical field]. [PDF]
Se PuZhao XM, Zhang ZY, Sun WJ, Qing GY.
europepmc +1 more source
[Research progress of molecular imprinting technology in the field of disease diagnosis and therapy]. [PDF]
Se PuZhu R, Cai GP, Zheng HJ, Jia Q.
europepmc +1 more source
[Medical treatment standards for emergency burn wounded (2025 edition)]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiNational Health Commission Of The People's Republic Of China.
europepmc +1 more source
[Diabetic Charcot neuroarthropathy initially misdiagnosed as rheumatoid arthritis and gout: A case report]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanGu J, Li X, Zhao J, Mu R.
europepmc +1 more source
Gaoya dianqi高压输电线路绝缘子串中的劣化件会威胁电网安全。为了研究劣化瓷绝缘子的红外发热特性，设置了一系列实验，研究了劣化绝缘子的电阻、沿串位置和环境相对湿度对红外检测的影响。并对含有两片劣化绝缘子的绝缘子串进行了附加实验，以研究了正常绝缘子和低值绝缘子之间不同的发热现象。利用有限元分析仿真进一步分析了红外图像中钢帽的发热机理。实验和仿真结果表明：劣化绝缘子的温升与阻值呈非线性关系，当电阻为30 MΩ时温升最大；绝缘子串两端的劣化易被检测；相对湿度过高可能会导致误检；正常绝缘子的发热区域是钢帽的下部 ...
裴少通 +4 more
doaj
[Central nervous system infection mimicking neuropsychiatric systemic lupus erythematosus: A case report]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanZhao K, Lu F, Wang Y.
europepmc +1 more source