Results 31 to 40 of about 7,888 (166)
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Developing oxygen evolution reaction (OER) catalysts that combine high performance with cost‐effectiveness is a critical challenge for advancing the commercialization of anion exchange membrane water electrolysis (AEMWE). Practical application is often hindered by issues such as poor batch reproducibility and low‐cost efficiency.
Chuang Zhang +9 more
wiley +1 more source
Design and Implementation of the Teaching Evaluation System Based on .NET for An Art School [PDF]
, 2016 随着我国高校教育规模的拓展高校的教学管理任务日趋繁重，如何保证高校的教学效果和有效及时的监督教学质量显然变得非常关键。教师教学质量评价是教学质量监控的关键环节，是提高教学质量和办学效益的重要手段。对建立完善的教学质量监控体系，推进教风与学风建设，客观公正地评价教师教学工作，激发教师教学的质量意识，规范教学要求，强化教学管理，全面提高高校教师教学业务水平和教学效果，培养适应时代需要、具有创新精神和实践能力的全面发展的优秀人才有积极的作用。随着计算机技术的飞速发展，计算机在学校管理中应用的普及 ...
黄治钦
core
Modeling and simulation of PMSM control system based on SVPWM [PDF]
, 2008 The paper introduces the basic principle of space vector pulse width modulation simply and expatiates a method for implementing space vector pulse width modulation in detail based on MATLAB/SIMULINK, designs modeling and simulation of AC servo system ...
Guo, Y, Jin, J, Wang, Z, Zhan, Y, Zhu, J
core +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Metal oxide‐based catalysts for oxygen reduction reaction (ORR) have drawn great attention in recent years. However, it remains technically challenging for the precise regulation of the overall performance due to the trade‐off effect among the activity, selectivity, and stability of electrocatalysts. Herein, a balancing strategy to control the
Haoran Ma +7 more
wiley +1 more source
Gaoya dianqi, 2012 并联有源滤波器是消除电网中非线性负载产生的电流谐波的有效手段。针对PI控制器在并联有源滤波器中的局限性,将重复控制和PI控制器并联用于并联有源滤波器输出电流波形的控制。笔者在给出并联有源滤波器主电路结构的基础上,介绍了一种基于瞬时无功功率法的谐波检测方法及基于重复控制和PI控制的复合控制策略。最后,通过MATLAB/Simulink对所提控制策略进行了仿真验证。仿真结果证明了该控制策略的有效性。
吕敬, 高宁, 蔡旭
doaj
Production of 1,3-Propanediol from Raw Glycerol by Biocatalytic Transformation [PDF]
, 2013 1，3-丙二醇（1，3-PD）是一种重要的化工原料，具有广泛的应用领域。发酵法生产1，3-PD以利用可再生资源等优点日益受到重视。大部分研究以纯甘油为底物，成本高，如果以粗甘油为底物，可大大降低生产成本。 本论文的研究目的是以粗甘油为底物，以Clostridiumbutyricum（丁酸梭状芽孢杆菌）为生产菌株，通过厌氧发酵生产1，3-PD，在粗甘油预处理、提高菌体浓度、提高单位菌体生产能力、延长发酵周期和建立动力学模型这几个方面进行了研究，主要结果如下： （1 ...
朱春杰
core
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT This study introduces a novel velocity‐iterative directional annealing (IDA) strategy to overcome stagnation challenges in columnar grain growth of Ti‐48Al‐2Cr‐2Nb alloys. By dynamically adjusting hot zone migration rates across iterative cycles, the IDA protocol achieved 92.2% synchronization between anisotropic α‐grain boundary (GB ...
Zedong Liu +6 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
Investment Analysis and Decision Research on Dong Cheng Mei Yuan Real Estate Project [PDF]
, 2015 摘要 当前，房地产市场是人们最关心的领域之一，它不仅关系到千家万户的利益，也影响着我国国民经济的增长和金融领域的安全，是历来学术界和理论界关注的焦点。从2013年开始，我国房地产市场开始出现增速缓慢甚至下降的趋势。特别是2014年上半年，这个趋势更加明显。作为焦作市中心城区的山阳区，房地产发展在2014年也面临着巨大的压力。许多房地产企业面临着资金链断裂、销售危机等多重威胁，发展举步维艰，如果在当前浓厚观望氛围中实现突围，成为房地产企业面临的首要任务。在这种背景下 ...
张伟
core
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Zirconium dioxide (ZrO2) thin films are critical materials owing to their thermal stability, mechanical durability, and optical transparency enabling applications in photonic, sensing, and electronic devices. However, achieving uniform deposition via plasma‐enhanced chemical vapor deposition (PE‐CVD) has remained challenging due to poor ...
Nour Manafikhi +4 more
wiley +1 more source