Results 61 to 70 of about 24,422 (178)
The research on optical properties of InN and InGaN films [PDF]
, 2016 随着人类社会进入信息化社会，信息量飞速增长。为适应生活的需求以及时代的要求，以半导体为代表的材料和器件迅速发展，遍及人类生活的各个领域。InN与InGaN材料因其带隙随In组分x变化从0.7到3.4eV连续可调，其对应的吸收光谱的波长从紫外部分(365nm)可以一直延伸到近红外部分(1770nm)，几乎完整地覆盖了整个太阳光谱，这为设计新型太阳能电池、超高亮度发光二极管（LED）以及全彩显示提供了极大的可能，所以InN与InGaN材料近年来逐渐成为研究的热点。由于薄膜的光学常数（如折射率、吸收系数 ...
叶春芽
core
Long‐Term Time Horizons and Support for Public Investment
Policy Studies Journal, EarlyView.ABSTRACT Generating public support for long‐term public investment may require understanding what citizens perceive as the “long term” in politics and how these perceptions shape their preferences. Across two studies, we find that UK citizens generally understand “long term” as 5–10 years.
Matthew Barnfield +2 more
wiley +1 more source
Preparation of glucose biosensor based on the fabrication of catecholamine polymers-Au nanoparticle composite film [PDF]
, 2016 摘要 糖尿病是一种世界范围内的公共健康问题。这种新陈代谢紊乱是由于胰岛素分泌缺陷或多糖症引起的，主要表现为血糖浓度高于或低于正常范围（4.4-6.6mM）。这个疾病是人类死亡的主要引发原因之一。因此，数百万人每天都需要检测他们的血糖浓度，这使葡萄糖成为最普遍的被检测物质。实际上，葡萄糖生物传感器占据了整个生物传感器市场份额的85%。而基于葡萄糖氧化酶（GOD）的电化学酶电极在日常血糖检测领域处于主导地位。 多种形式的葡萄糖生物传感器已被研发出来。但是，他们的表面修饰结构都有低灵敏度和非特异性检测等缺陷 ...
南旭
core
Study on Key Parameter Range for Curie Point Passive Shutdown Device Based on Integrated Fast Reactor [PDF]
Passive shutdown procedures can be initiated by the Curie point passive shutdown device, which is a sophisticated reactor safety mechanism that augments the coolant temperature at the core outlet to ensure safety.
LI Xinyu, ZHANG Xisi, XUE Fangyuan, LIU Yizhe
core +1 more source
Legislating Uncertainty: Election Policies and the Amplification of Misinformation
Policy Studies Journal, EarlyView.ABSTRACT Can state election policies affect the spread of misinformation? This paper studies the role played by ballot processing policies, which determine when ballots can be examined and organized, in the online spread of political misinformation. We present evidence from the 2020 U.S.
Morgan Wack +5 more
wiley +1 more source
Realization mechanism and performance of room-temperature gas sensors [PDF]
, 2016 降低工作温度对于提高气体传感器的安全性，增加便携式或可穿戴设备的续航时间和组建高可靠性的无线传感网络有至关重要的作用。然而对于金属氧化物气体传感器来说，工作温度的降低并不是一件简单的事情。任何定量检测的本质都是事先构建一个可量化的不稳定平衡，然后让待测物打破这个平衡来获得响应。把传感器看作一个封闭系统，工作温度的降低意味着系统稳定性的增强，以至于在较低的温度下电流（或电压）平衡难以被痕量待测气体的出现所打破。近年来有研究表明借助紫外光活化可以显著地降低气体传感器的工作温度，甚至实现了对多种气体的室温检测，
刘彬
core
Topics as Outcomes: Modeling the Influence of Intergovernmental Grants on Policy Diffusion
Policy Studies Journal, EarlyView.ABSTRACT Intergovernmental grants stimulate the diffusion of policy reforms, as the federal government provides states with a financial incentive to adopt policies aligned with federal priorities. Less is known about the extent to which these grants also stimulate horizontal diffusion across states.
NaLette Brodnax, Sarah James
wiley +1 more source
Guangtongxin yanjiu, 2005 文章介绍了一种基于滤波器S11响应的时域分析的调谐方法。这种方法可以区分谐振器和耦合孔各自产生的时域响应,可以用来指导调节谐振器和耦合系数,得到所需的滤波器响应。通过这种方法还可以观察滤波器内部各元件间是如何相互作用的。
喻志刚, 廖德祥
doaj
Analysis of Linux Real - time Mechanism [PDF]
, 2007 摘 要:随着Linux 操作系统在嵌入式实时系统中的广泛应用,有效地提高Linux 有限的实时性能是一个重要问题,而 Linux 内核可抢占调度是实时性能的改进的关键。对Linux 内核调度器的工作原理进行了深入分析,并阐述了调度延迟是 其实时性不强的原因,然后介绍通过可抢占机制对Linux 内核进行改造,测试了改进后的内核的实时性。Abstract :With the wide application of Linux operation system in embedded real - time ...
余兵, 黎忠文
core +1 more source
Policy Studies Journal, EarlyView.ABSTRACT The social construction of target populations (SCTP) framework emphasizes the ways in which target populations' levels of political power and deservingness shape the allocation of policy benefits, but less attention has been devoted to the conditions under which the same target population may be considered deserving in one policy context but ...
Elizabeth Bell +3 more
wiley +1 more source