在结冰状态下一次设备闪络事故分析

介绍了玉贤变电站500 kV电流互感器的冰闪事故情况,分析事故的原因为瓷瓶表面纵向结冰不均匀引起径向电位差使外绝缘闪络。提出采用增爬裙能有效阻断冰桥。     

直流滤波器电容器的直流局部放电测量

为了配合葛州坝换流站直流滤波器电容器的损坏事故分析,进行了电容器常温和高温状态,直流电压作用下的局部放电试验。在常温和高温状态下,分别用双臂式抗干扰回路,和微窗口电路,有效地抑制了外部干扰。测量结果表明,电容器在高温状态下的直流局部放电量较常温下没有显著增加。文中还对电容器直流局部放电测量时所应注意的问题进行了讨论。     

结合继电保护定期检验浅谈对状态检修的认识和看法

根据继电保护运行和维护特点，结合运城供电系统当前实际情况，分析了二次设备状态检修的各种问题并提出相应采取的措施。     

红外制导武器的现状及发展趋势

红外制导可分为红外半自动制导、点源寻的制导、成像制导和未敏制导等几类。综述了各国研制的红外制导武器及其发展趋势。     

A Network-Level Connected Autonomous Driving Evaluation Platform Implementing C-V2X Technology

With the emerging connected autonomous driving paradigm,more advanced applications leveraging vehicular communications are drawing tremendous attentions.In orde...     

A Multifunctional and Fast-Response Lysosome-Targetable Fluorescent Probe for Monitoring pH and Isoxaflutole

A new chemosensor, namely N-(2-morpholinoethyl)acetamide-4-morpholine-1,8-naphthimide (MMN), was designed and synthesized through an amidation reaction. MMN was fabricated as a multifunctional fluorescent probe for monitoring pH and isoxaflutole. MMN exhibited excellent stability in MeCN/H₂O (v/v, 9/1), with an obvious “off–on” fluorescence response toward pH changes due to intramolecular charge transfer (ICT), where the linear response ranges of MMN in the weakly acidic system were from 4.2 to 5.0 and from 5.0 to 6.0 with apparent pK_a = 4.62 ± 0.02 and 5.43 ± 0.02. Based on morpholine as the lysosome targetable unit, MMN could selectively locate lysosomes in live cells. MMN also successfully detected the presence of H⁺ in test papers. Finally, MMN could specifically recognize isoxaflutole at a detection limit of 0.88 μM. A possible sensing mechanism was identified based on density function theory calculations. These results indicate that MMN could be a superior potential chemosensor for detecting pH and isoxaflutole selectively and sensitively and could be used in real sample detection.     

机械化学促成可调谐光-电多功能响应二维杂化钙钛矿材料

二维有机-无机杂化钙钛矿因在光伏、光电子等领域的巨大应用潜力而备受关注.此外,该类材料具有突出的结构可调性和材料稳定性,为功能性质的设计调控及器件应用提供了丰富的材料设计平台.然而,将多种物理通道的性质整合实现材料的多功能性仍具有挑战性,而对其进行快速有效的调节更是难上加难.迄今为止,尚未成功实现可调谐的光电多通道响应...     

Genome-Wide Identification of Switchgrass Laccases Involved in Lignin Biosynthesis and Heavy-Metal Responses

Plant laccase genes belong to a multigene family, play key roles in lignin polymerization, and participate in the resistance of plants to biotic and abiotic stresses. Switchgrass is an important resource for forage and bioenergy production, yet information about the switchgrass laccase gene family is scarce. Using bioinformatic approaches, a genome-wide analysis of the laccase multigene family in switchgrass was carried out in this study. In total, 49 laccase genes (PvLac1 to PvLac49) were identified; these can be divided into five subclades, and 20 of them were identified as targets of miR397. The tandem and segmental duplication of laccase genes on Chr05 and Chr08 contributed to the expansion of the laccase family. The laccase proteins shared conserved signature sequences but displayed relatively low sequence similarity, indicating the potential functional diversity of switchgrass laccases. Switchgrass laccases exhibited distinct tissue/organ expression patterns, revealing that some laccases might be involved in the lignification process during stem development. All five of the laccase isoforms selected from different subclades responded to heavy metal. The immediate response of lignin-related laccases, as well as the delayed response of low-abundance laccases, to heavy-metal treatment shed light on the multiple roles of laccase isoforms in response to heavy-metal stress.     

Development of gated fiber detectors for laser-induced strong electromagnetic pulse environments

With the development of laser technologies,nuclear reactions can happen in high-temperature plasma environments induced by lasers and have attracted a lot of at...