Results 61 to 70 of about 3,969 (162)
Research progress and challenges in prevention and control of combined disasters of coal spontaneous combustion and methane in coal mine goaf [PDF]
The combined disaster of coal spontaneous combustion and methane in coal mine goaf is one of the most serious disasters, often causing significant casualties and economic losses. In order to improve the ability to prevent and control combined disaster in
Botao QIN, Dong MA
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Gaoya dianqi, 2016 在高纬度低温地区,由于SF6气体出现液化,可能导致SF6开关设备发生绝缘击穿或开断失败等事故,由此该类地区大多采用混合气体（SF6+CF4）开关设备。气体分解产物检测是目前设备故障定位和缺陷诊断的重要手段。为此试验以40.5 k V混合气体断路器为试品,开展混合气体（SF6+CF4）不同燃弧能量下的气体分解产物试验,通过与纯SF6气体的比较分析,探讨混合气体（SF6+CF4）的分解特性。研究表明:开断电弧下,SF6+CF4混合气体的主要分解产物为CO、CO2、SO2、SOF2 ...
马凤翔 +7 more
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Research on Fiber Gas Sensor System Based on Scanning Light Source [PDF]
, 2011 提出了一种基于窄带扫描光源的光纤气体传感系统。该系统能在多种气体共存环境下,完成对不同组分气体浓度的检测。克服了传统光纤气体传感系统在多种气体共存环境下需要多台光源进行检测的弊端,降低了工业化气体检测的成本。系统以放大自发辐射(ASE)光源为基础,结合锯齿波(STW)驱动的可调谐法-珀(fAbry-PErOT)滤波器形成窄带扫描光源。针对可调谐滤波器的电容特性会引起锯齿波驱动失真的现象,提出了采用并联谐振回路的方案来解决锯齿波驱动失真的问题,保障了扫描光源工作的稳定性。实验结果表明 ...
沈炎鑫, 董小鹏, 郑俊达, 齐洁
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Design of Activated Charcoal Trap Based on Semiconductor Refrigeration [PDF]
Xenon (Xe) concentration and isotope ratios measurements are crucial in the nuclear industry, nuclear safeguards supervision, frontier science and other fields.
GUAN Yedong, LI Meng, LI Zhiming, WEI Guanyi, FANG Sui, WANG Wei, ZHANG Yang, LI Xuesong, XU Jiang
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Clinical report of 11 cases of inhalation poisoning caused by mixed gases of hydrogen sulfide and hydrogen cyanide [PDF]
, 2023 WANG Jian, ZHANG Jinsong
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, 2012 采用自主设计的转移弧等离子体发生装置,对金属硅进行电磁感应加热辅助等离子体熔炼除硼的研究;探索不同工艺条件如反应气体、熔炼时间和初始硼含量对除硼效果和硅损失的影响。结果表明:采用氩气和水蒸气混合气体(Ar+H2O)作为反应气体比氩气和氧气混合气体(Ar+O2)具有更好的除硼效果;随H2O含量的增加,硼的去除率与硅损失率都呈线性增加;采用Ar+1.5%H2O(体积分数)等离子体时,硼的去除率在30 min后达到最大值,其含量从22×10 6降至0.2×10 6(质量分数),硅损失率约为0.5%/min ...
卢成浩 +4 more
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Accident Safety Analysis of Helium-xenon Gas Cooled Reactor System under Unprotected Control [PDF]
As the fourth generation advanced reactor, the Brayton cycle system of small helium-xenon cooled reactor has the advantages of light weight, compact structure, simple system, fast start or stop, and is very suitable for the energy supply of remote areas ...
LIAO Haoyang1, MING Yang1, CHEN Baowen2, ZHAO Fulong1, , QIN Aoxiang1, GAO Puzhen1, TIAN Ruifeng1, TAN Sichao1
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Resistance characteristics of gas-liquid two-phase flow in stick venturi scrubbers [PDF]
, 2017 In order to grasp the resistance characteristics of gas-liquid two-phase flow in stick venturi scrubbers, based on the multiphase flow theory, a three-dimensional CFD model was established.
BU Ying-yong +4 more
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, 2019 目的探究白藜芦醇对小鼠皮层神经元兴奋性的影响。方法取1月龄雄性小鼠制备小鼠急性大脑前额叶皮层切片后,随机分为空白对照组与白藜芦醇组。实验过程中对照组不做处理,白藜芦醇组灌流液加入终浓度为100μmol·L-1的白藜芦醇溶液。采用电生理全细胞记录模式分别记录两组神经元的兴奋性突触后电流（sEPSC）、动作电位（AP）以及Cl-电流。结果与对照组比较,白藜芦醇组兴奋性电流幅度（Amplititude）与频率（Frequency）均降低,梯度电流刺激诱发的AP数目减少,Cl-电流的幅度与频率也明显降低 ...
卢萍 +6 more
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Gaoya dianqi, 2016 为解决SF6气体的温室效应及低温易液化问题的日益突出,SF6/N2、SF6/CF4等混合绝缘气体被认为是目前最有发展前景的替代介质,开始在气体断路器（GIC）以及气体输电管线（GIL）、GIS母线等非灭弧气室中推广应用。然而,大规模推广应用前,必须先解决混合气体的回收、净化处理等关键问题。由于SF6混合绝缘气体与纯SF6气体性质上有较大的区别,文中针对SF6/N2和SF6/CF4混合绝缘气体特性,提出了用多级高分子膜、深冷相变分离和低温精馏方法联用的混合气体分离净化方案 ...
刘伟 +5 more
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