Results 21 to 30 of about 7,256 (162)
Gas Sensing Research Based on the Tungsten Oxide Hierarchical Structure Materials [PDF]
, 2017 现如今在时代进步、生活富裕和科技发展的同时，人们越发关注身边的环境安全以及自己的身心健康。传感技术、计算机技术和通讯技术构成现代科技的三大支柱，其中传感技术为通信系统、信息系统和自动化系统的准确信息采集提供了重要保障。气体传感器作为传感领域一条重要分支，在环境安全、大气检测、防灾报警和医疗诊断等方面具有广泛应用，能有效地监测各类危险气体所带来或所隐藏的安全隐患。 在气体传感领域，相对于ZnO和SnO2等传统的气敏材料，WO3作为较新一代的气敏材料，具有灵敏度高、稳定性好和使用寿命长等优点 ...
刘珠文
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Developing efficient catalytic thermal desorption systems is of great significance in the field of sustainable soil remediation. Herein, novel Mn–Ce solid solution modified Co3O4 nanocrystals were successfully prepared for the removal of perfluorooctanoic acid (PFOA) in soil.
Yu‐Hao Liu +8 more
wiley +1 more source
Gaoya dianqi, 2016 SF6混合绝缘气体被认为是短期内最具发展前景的SF6替代介质。开展电气设备中SF6混合绝缘气体混气比检测技术研究,对SF6混合绝缘气体电气设备开展状态评价工作具有重要作用。文中提出了基于微流量热导传感器原理的混气比检测技术,研制了混气比检测装置,可检测SF6/CF4、SF6/N2、SF6/Air、SF6/CO2标准混合气体,检测值与标准值偏差均在1.5%以内;而且该检测装置可运用于现场混合气体电气设备中的混气比例检测,耗气量小,方便快速,大量试验数据验证了检测结果的准确性及现场检测的可行性。
陈英 +5 more
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Metal oxide semiconductor‐supported noble metal nanoparticles are common sensing materials for gas sensors. However, the large size and their tendency to migrate at high temperatures often lead to inferior sensing sensitivity and stability. Herein, a salt‐assistant strategy is developed to prepare fully‐exposed Ir clusters on SnO2 nanorods ...
Yi Jiang +7 more
wiley +1 more source
双金属Zn-Fe金属有机框架的制备及其丙酮气敏特性研究 [PDF]
, 2018 采用溶剂热法制备了双金属Zn-Fe金属有机框架结构(Zn-Fe MOF),利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线衍射仪(XRD)对其微观形貌和晶相进行表征分析。结果表明:制备的双金属Zn-Fe MOF为纳米球结构,其直径约为150 nm。同时,制备了基于双金属Zn-Fe MOF材料的气体传感器件,研究了其对丙酮的气敏特性。测试结果表明:基于双金属Zn-Fe MOF的气体传感器对丙酮的最佳工作温度为210℃。在最佳工作温度下,对浓度为1×10-6的丙酮气体响应可达到2,响应 ...
周迎杰 +5 more
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Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 6, Page 706-715, December 2025.ABSTRACT Objective To evaluate the use of twin vs singleton growth charts for detecting small‐for‐gestational‐age (SGA) twins at risk of adverse neonatal outcomes. Methods MEDLINE, EMBASE, CINAHL, Cochrane and Scopus databases were searched electronically from inception to May 2024.
S. Sorrenti +9 more
wiley +1 more source
Gaoya dianqi, 2012 SF6气体分解产物检测在电气设备故障分析中的应用比较广泛,而由于新气中含有一定量的CF4,所以分析重点集中于H2S、SO2、SOF2、SO2F2、HF几种特征气体。笔者将SF6气体分解产物检测技术应用于一起500 kV气体断路器的故障诊断,气体检测结果和解体检查表明断路器喷口发生非正常的电弧烧蚀,在经历较长一段时间后,仅体现在SF6气体中CF4体积分数的显著增加。从而表明,对于SF6气体绝缘电气设备应该定期进行检测气体分解物,对CF4体积分数的增加也应引起足够的重视,注重数据的横向和纵向的分析比较。
印华 +4 more
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Experimental study on the influence of surfactant foam properties on the slow release of gas in coal [PDF]
, 2023 In the process of mining coal resources, the abnormal emission of gas associated with coal may lead to serious gas overrun, and trigger problems such as gas disaster or greenhouse effect.
Dongjie YAN +5 more
core +1 more source
Integrative Conservation, Volume 4, Issue 3, Page 405-415, September 2025.Assessing the genetic diversity of edible insects harvested from the wild is a pre‐requisite for designing conservation and management policies. The caterpillars of Gynanisa maja (Saturniidae) are harvested in large numbers in mopane woodlands in southern Africa, where they represent a seasonal source of income and nutrition to many rural communities ...
Zwannda Nethavhani +3 more
wiley +1 more source
Gaoya dianqi, 2021 目前广泛使用的绝缘介质SF6产生的温室效应与电力系统对环境友好的要求相矛盾。近期,环保型绝缘介质C4F7N-CO2混合气体被认为具有良好的工程应用前景。由于混合气体的绝缘性能与C4F7N的含量及气体压力密切相关,未来工程应用中的充换气及运维等均需要对混合气体中C4F7N的含量进行检测,以确定混合气体的实际体积分数,目前鲜有针对混合气体中C4F7N体积分数的定量检测技术的相关报道。文中基于密度泛函理论对C4F7N进行了分子构型与频谱优化,得到其红外仿真图;基于傅里叶红外光谱技术（FITR ...
马勇 +6 more
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