Results 81 to 90 of about 39,766 (300)
A Study on Pitting Resistance of Gear Tooth with Laser Surface Treatment
Jixie chuandong, 1994 本文用常用的辊子模拟方法，对４０Ｃｒ钢调质试件进行激光表面相变硬化．然后与４０Ｃｒ钢调质处理试件一起进行接触强度对比试验。结果表明，激光相变硬化能显著地提高齿轮等滚滑接触表面的疲劳寿命，本文还分析了激光表面相变硬化提高齿轮接触强度的机理。
黄华樑, 玉如峰
doaj
Research on Patterning Fingerprint Texture for Cholesteric Liquid Crystal Gratings [PDF]
, 2016 胆甾相液晶指纹织构光栅是基于胆甾相液晶在平面内的周期性排列的相位光栅，由于其在光束调制器件上的应用前景，近几年成为了面向非显示应用的液晶研究领域中的热点之一。聚合物稳定的胆甾相液晶指纹织构光栅实现了零电场下稳定的液晶光栅阵列，发挥了聚合物高分子材料和液晶相结合的优势，可以克服胆甾相液晶指纹织构光栅实用性低的缺点；在此基础上，实现胆甾相液晶指纹织构光栅的聚合稳定图案化的多样性和微型化，将会拓展胆甾相液晶指纹织构光栅在光束调制器、光通讯、显示等领域的应用。基于光控取向的胆甾相液晶指纹织构光栅图案化 ...
罗斌
core
Super long-range diffusion of carbon during proeutectoid ferrite transformation [PDF]
, 2019 In order to explore the possible diffusion distance of carbon during proeutectoid ferrite transformation, a slow cooling test of low carbon steel was carried out under vacuum of the thermal simulator.
Ding, Jianhua +5 more
core +1 more source
Importance of connectivity for carnivore richness and occupancy in fragmented biodiversity hotspots
Conservation Biology, EarlyView.Abstract Structural connectivity affects wildlife movement between habitat patches, contributing to the persistence of wildlife populations and their resilience to human‐induced and environmental changes. However, its importance to wildlife population persistence remains unclear, particularly in fragmented landscapes, where there are additional co ...
Cindy M. Hurtado +12 more
wiley +1 more source
Chemical Synthesis and Characterizations of SrSi2O2N2: Eu2+ Phosphors for White LEDs Applications [PDF]
, 2016 白光发光二极管(whitelight-emittingdiodes，WLEDs)具有寿命长、能耗低以及结构紧凑等优点，因此被广泛的关注。目前，基于蓝光LED的荧光粉转换WLEDs(phosphor-converted-WLEDs，PC-WLEDs)是市场的主流，该方案需要搭配荧光粉以产生白光。因此，荧光粉是PC-WLEDs的关键材料之一。 为了获得较高显色指数的PC-WLED，绿色荧光粉是必不可少的。SrSi2O2N2:Eu2+(SSON)是一种性能优异的绿色荧光粉，具有较高的量子效率，较宽的吸收带 ...
DHIA ABDULMUHSIN HASSAN AAL-MO
core
Striking a Balance: Stakeholder Perceptions of Risk in Horse Racing
Equine Veterinary Journal, EarlyView.ABSTRACT Background Thoroughbred racing is a major industry, and in recent years, public concerns about equine safety have become more prominent, particularly in relation to on‐track injuries and fatalities. This has challenged the industry's social licence to operate (SLO).
Jessie McCarthy +2 more
wiley +1 more source
Preparation of nanostructure TiO2 materals and fabrication of MSM ultraviolet photodetectors based on Nb doped antase TiO2 [PDF]
, 2015 随着宽禁带半导体材料与器件技术的快速发展，基于宽禁带半导体的紫外探测器有望取代传统的硅基紫外探测器。TiO2材料主要吸收紫外辐射，对可见光几乎不吸收，制备的探测器紫外光/可见光响应对比度较高，因此具有可见光盲和高紫外探测灵敏度特性。另外，TiO2材料制备工艺相对简单，适合用于制备成本较低的紫外探测器。目前，TiO2基紫外探测器的研究大多采用纯锐钛矿相和金红石相的TiO2薄膜材料。对于纳米结构的TiO2薄膜材料和掺杂的TiO2基光电探测器的制备及其性能还知之甚少，本研究工作的主要内容可以分为两大部分：一 ...
张自锋
core
International Journal of Applied Linguistics, EarlyView.ABSTRACT Although psychological factors such as emotion and engagement have gained increasing attention for their role in language learning success, a substantial gap remains in understanding the sources of boredom and its impact on learners’ engagement, whether behavioural, affective or cognitive, in languages other than English (LOTE).
Xian Zhao, Danping Wang
wiley +1 more source