摘要：介绍了进口110kV交联聚乙烯绝缘电缆模压接头连续多次击穿故障的情况,分析了该接头设计和结构上存在的问题,并重点对故障接头进行解剖和试验,最后查出了该接头在工艺上的缺陷是造成击穿的主要原因。

摘要：根据混杂复合材料理论 ,将重组木的构成单元———木束与重组竹的构成单元———竹束 ,采用混杂方法复合 ,并对 3种不同的混杂形态和不同混杂比进行了木竹重组材的结构设计及抗弯力学性能的研究。结果表明 ,与重组木相比 ,木竹重组材的比模量略有提高 ,比强度提高较大 ;3种混杂形态中 ,以竹束为表面的夹芯结构的比模量及比强度最高 ,均匀混杂的木竹重组材的抗弯性能最低 ;木竹重组材的抗弯性能均随竹束用量的增大而有不同程度地增大。重组竹的比模量和比强度分别比重组木高出 5 0 %和 12 0 %。

摘要：采用回流导体能提升单芯海底电力电缆载流量,但是目前国内缺少回流导体对海底电缆载流量影响的相关研究。为此,在IEC 60287标准基础上建立两种不同回流导体结构海底电缆的集中参数热路模型以及相应的载流量计算方法,分析了不同结构的回流导体对高压海底电缆损耗和载流量的影响,评估了不同截面积的回流导体对海底电缆损耗和载流量的影响。结果表明,内部回流导体能够有效降低电缆损耗,从而提升电缆载流量;回流导体截面积从0 mm^2增加到500 mm^2,电缆载流量也随之增加34.7%。所研究的结果能够为具有回流导体结构的海底电缆的设计和选型提供理论依据。

摘要：The Pt-based catalyst tends to be poisoned by carbon monoxide(CO)-like intermediates produced in fuel cell reactions,which seriously deteriorates its catalytic ***,noble metal Au with the capacity of resistance to CO-like intermediates poisoning was employed to construct multi-element Pt-based *** trimetallic NiPtAu hollow nanocrystals(HNCs)with different surface Au contents were synthesized to explore the role of Au in electrocatalysis for alkaline methanol oxidation reaction(MOR).The trimetallic NiPtAu-SRAu HNCs catalyst with the relative rich Au content(15.17 at%)on surface exhibits a much lower CO oxidation peak potential than the other HNCs counterpart and 20 wt%Pt/C,which indicates the more exceptional CO-resisting ***,the MOR specific activity of NiPtAu-SRAu HNCs(31.52 mA cm^−2)is 7 times higher than that of 20wt%Pt/C(4.50 mA cm^−2).This enhancement in catalytic activity as well as anti-CO poisoning capability for NiPtAu-SRAu HNCs can be mainly ascribed to the weakened CO adsorption due to the exposure of Au atoms on NiPt surface evidenced by the experimental data and density functional theory *** study not only investigates the role of Au in MOR catalysis but also could be helpful for designing and optimizing the electrocatalysts for high-active and robust fuel cell applications.

摘要：The overall water splitting for hydrogen production is an effective strategy to resolve the environmental and energy crisis. Here, we report a facile approach to synthesize the Ir-based multimetallic, hierarchical, double-coreshelled architecture(HCSA) assisted by oil bath reaction for boosting overall water splitting in acidic environment. The Ir Ni Cu HCSA shows superior electrocatalytic activity for hydrogen evolution reaction(HER) and oxygen evolution reaction(OER), which are comparable to commercial Pt/C and better than IrO2. The Ir Ni Cu HCSA exhibits remarkably catalytic efficiency as bifunctional catalyst for overall water splitting where a low cell voltage of 1.53 V is enough to drive a current density of 10 mA cm^-2 and maintains stable for at least 20 h. The presented work for the design and synthesis of novel Ir-based multimetallic architecture paves the way for highperformance overall water splitting catalysis.