Results 21 to 30 of about 86,621 (160)
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Photocatalytic hydrogen peroxide (H2O2) production from water and oxygen driven by solar energy represents a highly promising green and sustainable strategy. Herein, lignin‐derived carbon quantum dots (LCDs) were strategically introduced at the heterojunction between a Bi‐based metal organic framework (Bi‐MOF) and ZnIn2S4 (ZIS).
Wanpeng Sun +8 more
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Gaoya dianqi, 1994 [问]高原环境条件有哪些特点?它对高压电器的运行性能有什么影响?[答]高原环境条件的特点主要是:气压低、气温低、气温日变化大、绝对湿度低和太阳辐射强度比较强烈.由于低气压时的低空气密度会降低空气的耐电压强度、空气的冷却效应以及弧隙的空气介质恢复强度,所以高压电器的空气绝缘耐压下降,由空气冷却的零部件温度增高,并且在空气中灭弧比较困难.气温的日变化大,可能引起高压电器的密封不易保持以及机械结构变形或开裂.低气温对高压电器因气压或空气密度降低而引起的温度增高有补偿作用 ...
涟生
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Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
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, 2016 本发明公开了一种煤层气的毛细管压力测试系统，包括：传压筒，用于形成气水界面，将井筒中的液柱高度产生的压力传送到毛细管中；毛细管，用于将下入深度的压力传送到井口；毛细管保护器，用于保护井筒中的毛细管，并使毛细管贴紧油管外壁；毛细管四通连接器；吹扫子系统，与所述毛细管四通连接器相连，用于将所述传压筒中的空气或水从毛细管中吹出，并充入氮气，以保持毛细管中介质的纯净；压力表，与所述毛细管四通连接器相连接，用于实时显示毛细管传输到煤层气井井口的压力；数据采集子系统，与所述毛细管四通连接器相连接 ...
孙贺东 +4 more
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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
Gaoya dianqi, 2021 文中介绍了一种新型环保绝缘气体六氟丙烯（1-C3F6）,并重点研究了1-C3F6与CO2混合气体在不同电极结构和电压特性下的绝缘特性。研究表明:在均匀电场中,1-C3F6/CO2混合气体的50%击穿电压随着电极间距、气压的增加而增加,工频击穿电压随着充气压力的升高而近似线性升高,纯1-C3F6气体在1.25 bar（1 bar=100 k Pa）时的工频击穿电压与SF6接近。此外,在各个充气压力下,1-C3F6/CO2混合气体的工频击穿电压都比C5F10O/Air混合气体高。在稍不均匀电场中,1 ...
周永言 +4 more
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Solar‐blind ultraviolet (UV) photodetectors (SBPDs) play a critical role in applications including UV communication and fire warning systems. Gallium oxide (Ga2O3) has emerged as a promising material due to its wide bandgap and low cost, but suffers from high dark current and slow response speed caused by oxygen vacancy (VO) defects. This work
Yuhao Lin +14 more
wiley +1 more source
Gaoya dianqi, 2019 为研究低气压条件下棒—板空气间隙放电特性,利用低气压放电试验平台针对100～600 mm棒—板空气间隙在交流电压下的放电电压U50与气压P、间隙距离d的关系进行了试验,分析了2～60 kPa气压范围内P与d对U50的影响,得到了U50与P,d之间的关系曲线并提出了2～60 kPa气压范围内的放电电压校正公式。研究结果表明:在2～60 kPa气压范围内不同棒—板间隙的U50-P曲线均存在明显饱和区,随间隙距离减小饱和区向高气压方向移动,根据试验数据所得放电电压校正公式具有较高的精确度 ...
李熙, 夏喻, 陈艳
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Journal of Adolescence, Volume 98, Issue 5, Page 1715-1736, July 2026.ABSTRACT Introduction Following rapid iterations in media technologies, Chinese millennials (born between 1980 and 1995) find themselves in a paradoxical state where digital saturation exists alongside fatigue, making them central practitioners of digital minimalist behavior.
Chao Zhang, Yinze Hao, Jingwen Li
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Gaoya dianqi, 2016 文中以SF6/N2混合气体作为比较,研究了CF3I/N2混合气体中绝缘子在工频电压和正、负极性雷电冲击电压下的沿面闪络特性。结果表明:在0.10.3 MPa下,CF3I/N2混合气体中绝缘子的工频闪络电压和雷电冲击闪络电压均随气压升高而增大;在较低气压下,CF3I/N2混合气体中绝缘子的负雷电冲击闪络电压比正极性下要低,而当气压高于某临界值时,负极性下闪络电压又会高于正极性;绝缘子在含30%CF3I气体的CF3I/N2混合气体中的绝缘性能基本介于含20%/30%SF6气体的SF6 ...
张辉, 肖登明, 赵谡, 李冰
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