Results 41 to 50 of about 6,932 (168)
Optimizing CuO on 3D Ordered Macroporous CeO2 for CO Oxidation in Rich Hydrogen
Rare Metals, EarlyView.ABSTRACT CO preferential oxidation (CO‐PROX) in rich H2 is considered a feasible strategy to solve CO poisoning for fuel cells, but obtaining good activity at low temperatures is still a challenge. Herein, three‐dimensional ordered macroporous (3DOM) CuO/CeO2 catalysts were fabricated by a templating approach, with the metal–support interaction (MSI ...
Xiaohua Chen +7 more
wiley +1 more source
Gaoya dianqi, 2018 当低压微电网由并网过渡到孤岛运行时会出现功率缺额的现象,导致微电网无法保持电压和频率稳定。文中提出了双重下垂控制的策略,即在改进耦合下垂控制同时,又增加一层对于直流总线电压响应的下垂控制。该控制策略能够在这孤岛模式和并网模式下工作,实现自动调节微电源的输出功率。此外,该控制策略还解决了孤岛模式和并网模式之间的切换不平滑的问题。对提高微电网的电能质量和供电可靠性具有重要意义。以上所提出的控制策略通过MATLAB仿真验证其有效性。
汪玉凤, 李琳, 王立辉, 张志强
doaj
Mathematical Modeling and Control System Simulation of the Batch Canned Food Sterilization Processes [PDF]
, 2014 批次生产（加工）是现代工业的一种重要生产方式，在产品制造（加工）方面具有许多突出的优点。目前，该生产方式广泛应用于生物产品加工、精细化工以及食品工业。特别是在食品加工行业，批次生产过程的应用以及相关控制技术已经取得了显著的进展。在食品加工行业中，罐头食品的高压灭菌过程既是一道关键的生产工序，同时也是一个典型的批次生产过程。该生产过程既具有多变量和非线性特点，同时也是一个高能耗的生产过程，因此针对该类过程的建模，仿真以及控制技术的研究，对于保证生产过程的安全 ...
MOHAMMED ABDELRAHIM MOHAMMED E
core
Laser‐Driven Halide Exchange and High‐Resolution Multicolor Patterning of Perovskite Films
Rare Metals, EarlyView.ABSTRACT Translating the excellent properties of metal halide perovskites (MHPs) into practical flexible optoelectronic devices requires high‐resolution multicolor patterning techniques that are compatible with post‐fabrication processing. However, such a capability has remained elusive.
Shu Yang +6 more
wiley +1 more source
Gaoya dianqi, 2012 基于Z拓扑的逆变系统,需在开关控制信号中加入直通信号。传统的滞环控制算法无法实现。针对这一局限,提出一种新的适用于Z拓扑的定频电流滞环控制策略。该策略保留了传统滞环控制的优点;采用定频控制,降低了系统损耗,便于滤波;有了Z源的升压作用,系统功率输出能力明显提高。通过MATLAB仿真,并经过实验验证,证明了该策略的可行性。
施胜丹, 黄金军
doaj
The Design and Implementation of the Large-scale Biomass Gasification Equipment Automatic Control System [PDF]
, 2015 生物质能源是一种可再生资源，若能高效的开发生物质能源，将有助于解决资源枯竭、环境污染等问题。目前，国内对生物质能源开发利用率却不足20%。针对这个问题，本团队研发出一种生物质气化装备。而本课题旨在为该气化装备开发一种高效、稳定、成本低的自动控制系统。本课题的实现，将使得生物质能源的开发效率得到显著提升。 由于气化装备具有被控参数多且关联性强、系统时滞大等特点，本文的首要任务就是提出一种控制策略，即如何合理划分装备的控制区域，并构建子系统。本课题基于该控制策略，开发了一套完整的自动控制系统 ...
陈俊
core
Rare Metals, EarlyView.ABSTRACT Regulating negative parameters of metacomposites is mainly limited by their unclear mechanisms, which affects their practical applications in new sensing, communication, electromagnetic (EM) protection and other fields. This work proposes a dual‐functional competitive design strategy based on the waste corncob‐derived carbon/polyaniline ...
Qiuyun Yang +4 more
wiley +1 more source
Key Techniques and Applied Research on Engineering Vehicles' Noise Reduction, Energy Saving and Acoustic Comfort [PDF]
, 2016 当前，噪声已经成为衡量工程机械装备性能的一个重要指标。市场要求越来越高，相关的国家标准、国际标准日益严格。随着大功率产品的不断发展，整机噪声随之增加和热流密度不断提高，过低的冷却空气流量已满足不了发动机的热平衡要求，整机工作热流密度与逐渐降低的噪声限值的矛盾日益突出。同时，随着人们生活质量和品质追求的提高，整机声学舒适性也逐渐备受关注，对噪声的控制由最初的满足限值要求将转向声学舒适性的研究。因此，我国工程机械要发展并跻身世界市场，必须解决整机存在噪声偏大、热流密度高和声学舒适性差的共性问题 ...
张恩来
core
Rare Metals, EarlyView.ABSTRACT The development of high‐performance and stable electrocatalysts for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) plays a critical role in advancing clean energy technologies, including metal‐air batteries and hydrogen production through overall water splitting.
Chen‐Yu Cai +4 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Single‐atom catalysis hinges on fundamental challenges in precisely controlling metal‐support interactions and rationally regulating metal–adsorbate relationships. Herein, we report a universal strategy for constructing highly efficient and well‐defined Cu(I) single‐atom catalysts based on a trifurcate AlL3 molecular support.
Donghui Zhang +9 more
wiley +1 more source