Results 121 to 130 of about 43,544 (260)
Rare Metals, EarlyView.ABSTRACT High‐entropy alloys (HEAs) have attracted considerable interest from researchers owing to their tunable chemical compositions, exceptional structural stability, and promising catalytic properties. However, their large‐scale application is often hindered by complex manufacturing techniques and poor durability.
Sheng Guo +9 more
wiley +1 more source
500kV同塔双回线路过电压计算及杆塔操作冲击最小空气间隙选择
Dianci bileiqi, 2016 为了确定同塔双回输电线路操作过电压最小空气间隙,运用ATP计算了500kV太安-黄坪同塔双回空载线路合闸过电压、单相重合闸过电压、故障解环操作过电压,通过比较获得了相地2%最高过电压为1.82p.u,出现在线路末端距太安22%处。开展了500kV双回线路真型塔中相I串对下侧横担、下相I串对塔腿间隙操作冲击试验,获得了间隙距离与操作波放电特性曲线,结合最高过电压水平计算了中相I串对下侧横担、下相I串对塔腿最小安全间隙为2.75m和2.78m,为500kV同塔双回线路操作过电压间隙选择提供了依据。
方书博, 李牧, 张晓琴, 张弓
doaj
Research on design strategies of thermal buffer spaces in the Solar Decathlon competition houses [PDF]
, 2016 随着可持续技术的快速发展，在建筑设计中对有效的可持续设计策略需要，导致对相关领域研究的需要也日益突出。国际太阳能十项全能竞赛就是在设计和建造可持续太阳能住宅的背景下开展起来的。本文研究了在太阳能十项全能比赛中的各个参赛作品将热缓冲空间作为一种技术策略的使用情况。通过对热缓冲空间的热环境、风环境和光环境进行研究，分析其在能耗和功能方面的作用。作者根据相应的热缓冲空间所做的研究工作如下： 对热缓冲空间进行分类：选择了21个使用了热缓冲空间的太阳能十项全能竞赛的作品，通过对热缓冲空间的几何形态 ...
CHISHA CHISELEBWE
core
Interface Issues of Inorganic Solid‐State Electrolytes in Secondary Magnesium Batteries
Rare Metals, EarlyView.ABSTRACT Solid‐state magnesium batteries (SSMBs) have gained significant attention as promising candidates for next‐generation safe energy storage systems because of the abundance of magnesium (Mg) in the earth's crust, superior energy density, and inherent nonflammability.
Jiren Wang +9 more
wiley +1 more source
An Analysis on The Industrial Upgrading Effect of China's Outward Direct Investment [PDF]
, 2016 坚定不移地推动产业升级，是实现一国尤其是大国经济持续增长的根本性途径，更是缓解和解决、协调与平衡当前我国经济现实发展和未来超越的根本对策。现阶段的我国经济，正面临着当前和未来发展的双重任务：既要缓解当前产能过剩、劳动力成本攀升、经济持续下行的压力，谋求转换经济增长的动力机制；也要应对新一轮产业革命带来的巨大挑战和赶超机遇，顺利跨越中等收入陷阱。简言之，在产业层面上，我国经济发展正处于“低端产业守不住、高端产业上不去”的困境之中。 推动产业升级的关键环节是技术创新与技术进步。由于众多因素的共同作用 ...
潘煌
core
Rare Metals, EarlyView.ABSTRACT Two‐dimensional (2D) nonlayered niobium nitrides have attracted considerable interest for electrochemical energy storage. However, the synthesis of these materials is hampered by their nonlayered crystal structures, which are characterized by strong three‐dimensional chemical bonding.
Rui Huo +7 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
Rare Metals, EarlyView.ABSTRACT As a core component in the electrochemical water splitting system, the cathode catalyst is capable of boosting the kinetics of the hydrogen evolution reaction (HER), while the scarcity and expenditure of current noble metal‐based electrocatalysts seriously restrict the large‐scale commercial development of hydrogen manufacturing devices. Here,
Haiyan He +8 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT The development of high‐efficiency, stable, and scalable perovskite solar cells/perovskite solar modules (PSCs/PSMs) highly depends on the performance and cost‐effectiveness of functional layers such as electron transport layers (ETLs) and hole transport layers (HTLs).
Baochang Wang +11 more
wiley +1 more source