Results 31 to 40 of about 18,581 (123)
Gaoya dianqi, 2020 接地体是接地网的组成部分,实现其腐蚀精确定位和定量评价是接地网腐蚀检测的前期工作之一。针对接地体早期腐蚀难以诊断的特点,提出一种基于多物理场的声波检测接地体腐蚀状态的诊断方法。利用接地体腐蚀区域和未腐蚀区域激发出声信号特征的差异,实现对接地体腐蚀状态检测。首先,建立数学物理模型,给定了求解域和边界条件,探索了电—声耦合下接地体在流体介质中的声波传播特性。利用有限元仿真软件分析接地体在不同腐蚀程度区域的声压特点,分析了不同区域声压存在差异性的原因。采用搭建的实验系统进行了初步的实验 ...
赵智忠 +4 more
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT The escalating severity of global environmental pollution necessitates the development of sustainable and efficient adsorption materials. Nanocellulose (NC), sourced from the most abundant natural polymer on earth, has shown great potential in this field due to its renewability, biodegradability, and exceptional nanoscale properties.
Yaqian Yu +5 more
wiley +1 more source
Hybrid Flexible–Soft Neural Interface as a Practical Solution for Long‐Term Implants
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Implantable neural interfaces face persistent challenges in long‐term functionality due to chronic immune responses, mechanical mismatch with tissue, and material corrosion in vivo. The commonly used flexible materials, such as polyimide and parylene‐C (poly[monochloro‐p‐xylylene]), have advantages in low water vapor permeability and high ...
Bowen Ji +13 more
wiley +1 more source
高土壤电阻率地区柔性石墨复合接地材料与圆钢接地材料的有效长度对比研究
Dianci bileiqi, 2018 改善杆塔接地能够有效的降低输电线路雷击跳闸率,对于高土壤电阻率地区的杆塔,减小冲击接地电阻是降低雷击跳闸率的关键,而减小接地体冲击接地电阻可以通过延长接地体长度来实现,但是当长度超过一定值时,延长将不再有效。因此研究接地体的有效长度、选取有效长度更长的接地材料,对降低接地电阻有着重要意义。首先分析了接地体有效长度的物理意义,然后运用CDEGS仿真软件计算工程中常用的镀锌钢和柔性石墨复合材料水平接地体的工频接地电阻与接地体长度、冲击接地电阻与接地体长度之间的关系 ...
张昌 +5 more
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Cisplatin‐related acute kidney injury (CP‐AKI) is a serious complication of cisplatin (CP) treated patients with cancer with high morbidity and mortality rates. It is directly related to the abnormal accumulation of CP in renal tubular epithelial cells, causing metabolic toxicity, DNA damage, and oxidative stress.
Minghe Jiang +12 more
wiley +1 more source
World Medical &Health Policy, Volume 18, Issue 3, September 2026.ABSTRACT This study examines the association between catastrophic health expenditure (CHE) and distress financing among India's uninsured “missing middle,” a population largely excluded from public insurance schemes and private coverage. While healthcare‐induced financial hardship is well documented, evidence on subsequent coping strategies among this ...
Neha Parikh +1 more
wiley +1 more source
Dianci bileiqi, 2017 接地网为隐蔽性设施,用参数识别的电测法对其进行腐蚀故障诊断只能通过对接地引线的测试进行,而根据相关标准,接地装置中与接地网连接的接地引线需定期进行电气完整性测试,以检查其是否与接地网可靠电气连接。为避免接地装置腐蚀诊断带来额外工作量的问题,基于生产中所获取的接地引线电气完整性测试数据信息,提出用其进行接地网支路和接地引线支路腐蚀诊断的方法,从而使得接地网支路导体的电测法腐蚀诊断无需进行专门测试,就可达到对接地装置网络导体的腐蚀诊断。通过仿真分析指出,随着接地导体埋地时间的增加 ...
刘熙 +6 more
doaj
Dianci bileiqi, 2011 针对目前变电站接地问题日益突出、常用的降阻措施受到多方面因素制约等问题,对变电站接地降阻改造中采用自然接地体的方法进行了讨论,并结合福建某110 kV变电站接地改造的工程实例,分析了利用自然接地体作接地装置的合理性和优越性。认为接地工程中,充分利用自然接地体不仅能有效降低接地电阻,还具有省工、省料、接地电阻稳定、使用寿命长、安全可靠性高等突出优点;在接地装置设计时应充分考虑变电站周边的地理条件,巧妙、合理地利用自然接地体,以达到降阻的目的。
彭利强 +4 more
doaj
Dianci bileiqi, 2015 采用时域有限差分法（FDTD）分析杆塔接地体腐蚀对其暂态接地阻抗的影响,建立接地体局部腐蚀FDTD计算模型,运用非均匀网格FDTD法得出了接地体局部腐蚀时的暂态接地阻抗,得出基于非均匀网络FDTD算法的接地体暂态冲击阻抗的计算较原有的FDTD算法更省时且在接地体内部有细缝时能够提高计算精度的结论。最后,通过Matlab仿真验证该方法的准确性和可行性。
朱凌峰, 周力行, 王攀, 曹智平
doaj
Dianci bileiqi, 2017 不同接地材料因其电磁参数的不同使得接地体的工频与冲击散流特性有区别。针对石墨、锰铜和钢三种接地材料进行仿真建模计算,建立了输电线路杆塔接地网常用的方框带射线型接地网模型,分别对比分析了三种接地材料在不同频率电流、不同土壤电阻率条件下的冲击散流特性,阐述了接地体散流特性对接地阻抗的影响。通过对比分析可知:在高频电流、高土壤电阻率条件下,柔性石墨接地体在远端的散流能力要优于钢接地体,接地阻抗更小。
詹清华 +7 more
doaj