Results 11 to 20 of about 6,486 (105)
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Photocatalytic molecular oxygen (O2) activation provides a sustainable approach to produce singlet oxygen (1O2) for organic contaminants detoxification. However, the charge carriers‐involved pathway usually suffers from unsatisfactory 1O2 production efficiency owing to energy loss caused by photogenerated hole‐mediated superoxide species (•O2−
Yan‐Biao Shi +8 more
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Ni3S2 has emerged as a promising catalyst for the electrochemical oxidation of biomass‐derived 5‐hydroxymethylfurfural (HMF) to 2,5‐furandicarboxylic acid (FDCA), driven by its distinctive physicochemical properties. However, its practical catalytic efficiency is severely hindered by abundant electrochemically inactive surface sites and poor ...
Cheng‐Feng Yi +5 more
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Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 5, Page 641-648, November 2025.ABSTRACT Objective To evaluate the impact of low‐dose aspirin (LDA) on placental size and uterine artery pulsatility index (UtA‐PI) by analyzing longitudinal changes between the first and second trimesters in pregnancies at high risk for early‐onset pre‐eclampsia (PE).
C. Trilla +7 more
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Guidelines to Reduce Invasive Fire Ant Interference of Small Mammal Trapping 入侵红火蚁对小型哺乳动物诱捕的干扰规避指南
Wildlife Letters, Volume 2, Issue 4, Page 214-218, December 2024.Baited live traps are commonly used in small mammal trapping. The red imported fire ant is an invasive species in the United States that may negatively impact trap efforts by feeding on bait and potentially preying on trapped small mammals. This study tested how five bait types and the use of ant spray around traps influence ant presence inside traps ...
Kathleen A. Carey +5 more
wiley +1 more source
Dianci bileiqi, 2015 高土壤电阻率地区牵引变电所接地设计和降阻措施一直是科技工作者关心的问题。介绍了各种降阻方法的原理、优缺点及适用范围,并以某牵引变电所为例,利用CDEGS软件进行了各种降阻措施下接地电阻值的仿真计算,经过比较,最终确定该所的接地设计方案:将水平接地体周围土壤换成土壤电阻率较低的粘土,并将接地体周围包裹物理降阻剂,再在该所场坪外敷设相同面积的水平接地网,最后放置离子接地极,经过计算达到了规范要求。
郝帅
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Dianci bileiqi, 2011 水电站接地短路电流普遍比较大,所处位置的土壤电阻率也比较高,接地降阻的难度往往比较大。结合贵州某水电站的降阻改造实例,对可供使用的降阻措施的分析,研究了适合水电站的各种降阻方法的优缺点和性价比。认为在水电站两公里以内,土壤电阻率较低的位置,使用铺设水平外引并施加性能优良的降阻防腐剂的方法和利用自然接地体的方法是性价比最高的方法;铺设水下接地网的方法也是一种很好的降阻方法,应根据实际情况依规程规定使用;做深井式接地装置的方法则应首先考虑其使用的前提条件是否满足,依情况使用。
徐刚
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Dianci bileiqi, 2005 综述了近年来添加剂对氧化锌电阻片电学性能影响方面的研究进展,分析了不同添加剂对氧化锌电阻片电学性能的影响机理。通过比较发现,纳米添加剂可以降低高温烧成时的烧成温度,进而抑制晶粒长大,改善烧成均匀性,氧化锌晶粒平均尺寸可控制在1μm左右,泄漏电流2μA,通流容量可达250J/cm3。指出纳米添加剂进一步在氧化锌电阻片生产中的应用是今后研究的方向。
马书蕊 +4 more
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Zhejiang Daxue xuebao. Lixue ban, 2005 选择阳离子聚丙烯酰胺类选堵剂，进行岩心模拟实验，研究不同岩心表面润湿性与化学选堵剂封堵能力之间的关系.表面润湿性强烈影响对水的堵塞率，水润湿性越强，对水的堵塞率越高，典型的亲水表面和亲油表面对水的堵塞率相差20% 左右；使用水基凝胶，水驱后的残余阻力系数(RRF)大于油驱后的RRF，水基凝胶使水相渗透率的降低比油相渗透率的降低多.对于润湿性相同，渗透率不同的天然岩心，选堵剂的堵水率大于85%，堵油率在20% 左右，表现出良好的选择性.
FANZhen-zhong(范振中) +1 more
doaj +1 more source
Dianci bileiqi, 2008 城市供电需求量增加,而城市土地资源又极为紧缺,城市变电站接地接地问题日益突出。通过对城市综合用地变电站接地特点的讨论,以厦门110kV岳阳站为例,结合理论计算和实际工程,从降阻和安全性角度,分析了城市综合用地变电站可供利用的接地降阻措施及其应用效果。认为城市综合用地变电站可利用的降阻措施主要有做深井式接地极、利用自然接地体和使用性能优良的降阻剂;利用变电站周围的建筑物地网是的安全有效的降阻方法。
杨鑫 +5 more
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Dianci bileiqi, 1992 阐述高ρ值避雷器试验站的接地要求,比较了不同深度的垂直接地体测量阻值,提出在高土壤电阻率情况下采用深埋接地体的施工方案,综述使用稀土降阻剂和敷设均压金属网的作用.
陈绍疆
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