Results 41 to 50 of about 15,349 (135)
Gaoya dianqi, 2023 高压自能式SF6断路器单向阀、回气阀和泄压阀的运动特性对灭弧室气流场计算结果的准确性具有重要影响。基于3个阀片实际的运动规律，运用牛顿第二定律，建立阀片运动的数学模型，并结合真实气体物性参数，对自能式SF6断路器灭弧室冷态气流场进行仿真，准确获得了3个阀片的运动特性，同时分析了3个阀片的受力特性及阀片周围的压力分布。研究表明，空载情况下，单向阀将对拉杆产生相对运动，这是引起单向阀由闭合到开启状态变化的主要原因，而回气阀移动的主要原因是压气室压力的建立 ...
赵伟涛 +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
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Zhongguo shiyan zhenduanxue, 2017 内源性呼气末正压（PEEPi）是指由于呼气气流受限或有效呼气时间不足导致呼气末时肺容积未能回到正常功能残气状态,呼气末时肺泡内压力大于大气压,所产生的正压称为PEEPi[1-6]。目前有相关研究表明 ...
朱冬雪, 杨俏, 金立民, 宋雪松
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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
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Gongye shui chuli, 2021 目前，国内已建高含硫气田均采用“正压气提+密闭氧化除硫”工艺去除气田采出水中的硫化物。该工艺应用过程中由于正压气提对气田采出水中硫化物的去除率低，从而造成吨水处理成本高。为降低处理成本，开展了负压气提工艺现场中试研究，确定了进水pH、气水比、塔内工作压力等最佳工艺参数，出水硫化物去除率达到99%。对YB29污水站进行负压气提工艺改造，整体运行数据与中试试验基本吻合，吨水处理费用降低至56元。
王伟, 朱国, 杨光
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Gaoya dianqi, 2016 采用混合气体是解决气体开关设备低温运行的有效途径之一。文中基于真实气体模型,建立SRK状态方程的迭代形式,给出了SF6与CF4气体压力值在0.11 MPa,温度在223323 K范围内压缩因子曲线,分析了温度与压力对压缩因子的影响,给出了不同压力与温度下,SF6与CF4真实气体与理想气体压缩因子的偏离情况,确定混合气体的压缩因子的混合规则,分析了温度与压力对压缩因子的影响,确定混合气体的混合规则,获得了SF6、CF4及混合气体饱和蒸汽压与等密度曲线,得到了混合气体在不同使用条件下的充气与补气方案 ...
钟建英 +4 more
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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, 2018 文中对电极间距为5 mm的指形电极下SF6/CF4混合气体中聚四氟乙烯绝缘表面直流闪络特性展开研究,分别测量了当SF6/CF4混合气体中SF6混合比为0%100%、压强为0.10.4 MPa时绝缘试样的直流沿面闪络电压,研究压强、混合比、电压极性等因素对绝缘试样直流沿面闪络特性的影响。实验结果表明:混合气体中SF6混合比一定时,在0.10.4 MPa气压范围内,绝缘试样的直流闪络电压随气压升高而呈线性增加;0.3 MPa的20%SF6/80%CF4气体中绝缘试样的负极性直流闪络电压为52.34 kV ...
杨明智, 林莘, 温苗, 李晓龙
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Enhanced Magnetocaloric Effect in Tb‐Co‐Ni Magnets via Chemical Pressure
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Magnetic refrigeration materials are significantly needed in versatile modern industries, including scientific research, aerospace, and health care, due to their potential applications in gas liquefaction and storage. Herein, a significantly enhanced magnetocaloric effect with a suitable operation temperature range of 53–114 K and a giant ...
Lei Xi +11 more
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Gaoya dianqi, 2011 针对液压机构液压系统气体污染的危害问题,介绍了高压断路器液压机构的工作原理,分析了液压系统气体污染产生的途径,重点论述了气体污染对系统运行的危害——造成渗漏油、动作时间不稳定、气蚀等现象,最后提出了防范气体污染的措施,主要从结构设计和整体布置上避免气体的存留,并采取抽真空或加装排气阀的方法进行排气处理,有效控制液压系统的气体污染。
邹高鹏
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