Results 21 to 30 of about 6,268 (166)
Study on Radiation Characteristic and Dynamic Behavior of Atmospheric Pressure Glow Discharge Plasma in Air [PDF]
, 2006 空气在常压下的辉光放电（即APGD：AtmosphericPressureGlowDischarge）生成的低温等离子在航空、材料表面改性、环境保护、臭氧合成、医学等诸多领域有着重要的应用价值，对其进行深入研究是非常有意义的。本文设计了常压下空气辉光放电装置，并在电极板平面上产生了一薄层的表面低温等离子体。针对产生出的表面等离子体具有光、声、热辐射特性，设计合理的实验测量方案，分别利用光栅光谱仪测量系统、噪音计以及红外测温仪首次对这种APGD等离子体的光辐射、声辐射及热辐射特性进行了非接触式测量分析 ...
任庆磊
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Functional Ecology, Volume 40, Issue 3, Page 750-763, March 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests worldwide are increasingly impacted by drought due to climate change, prompting plants to adapt through dehydration tolerance (DT) and avoidance (DA), two distinct physiological strategies.
Xingyun Liang +11 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
doaj
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The transformative potential of gallium nitride high electron mobility transistors (GaN HEMTs) in advancing carbon‐neutral power systems remains bottlenecked by contact resistance (Rc) at the metal–semiconductor (M‐S) interface, a critical determinant of switching losses and frequency response.
Ji‐Zhou Zhang +8 more
wiley +1 more source
Design Method of Secondary Light Distribution for LED Lighting System [PDF]
, 2014 随着人们对照明质量以及节能要求的不断提高，半导体照明光源作为第四代电光源，以其高光效、长寿命、节能、色温可调和环保等优点广受人们的关注。但是固体照明光源特别是LED的发光特性和外形等和以往光源不同，不能直接应用于现有的传统光源照明系统，因此需要对LED光源进行配光设计，使得重新构造的照明系统能够有效调制LED光源的配光曲线，满足各种照明需求。LED照明的配光设计对LED在照明领域的普及和提供高质量的照明均有重要的作用。本课题结合非成像理论、自由曲面设计原理 ...
罗秉东
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Developing low‐energy‐input electrocatalytic systems for efficient hydrogen production is crucial for advancing sustainable energy technologies. The overall hydrazine splitting (OHzS) has emerged as a promising strategy to reduce the overall energy consumption by replacing the sluggish oxygen evolution reaction.
Haozhou Chen +13 more
wiley +1 more source
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
Aluminum Coating on Modified Fluorinated Polymer Composite Films [PDF]
, 2005 [中文文摘]采用射频磁控溅射技术在改性氟塑料表面沉积铝层,制备了金属/氟化高聚物复合薄膜。利用场发射扫描电镜(FESEM)及能量散射谱(EDS)分析仪对沉积的铝层进行了表面形貌的表征和化学组分的分析。初步探讨了溅射功率、气压和时间等不同溅射参数对铝层结构和铝层在氟塑料表面附着情况的影响。结果表明:溅射功率是决定复合薄膜质量的重要因素,功率过低得不到致密的铝层结构,而且铝层容易从氟塑料表面脱离,功率过高则会产生很强的热效应而使复合薄膜弯曲。溅射气压和时间分别影响铝层在氟塑料表面的沉积速率和生长厚度 ...
张莹 +4 more
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