Results 41 to 50 of about 5,325 (166)
Rare Metals, EarlyView.ABSTRACT Polycrystalline SnSe thin film materials have gained increasing attention as a promising solution for fabricating microscale, flexible, self‐powered electronic components in the field of thermoelectric (TE) materials and devices. However, it is still a great challenge to simultaneously achieve preferred crystal orientation and optimize carrier
Wenxia Li +10 more
wiley +1 more source
Wireless Autonomous Power Flow Control in Converter-Fed Microgrids [PDF]
, 2014 When total apparent power of the energy storage system (ESS) interfacing converter is fixed, the higher the requirement on reactive power in the microgrid system with distributed multiple converters, the weaker the ability of ESS to balance theactive ...
Guerrero, Josep M. +4 more
core +2 more sources
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, 2015 在断路器的永磁机构控制器研发平台上,集成电动底盘车控制、监测、通信等功能。该集成式设计的电动底盘车监控单元采用脉冲调制技术（PWM）控制IGBT的通断时间从而实现电动底盘车的调速控制,采用霍尔电流互感器采集电机电流,实现底盘车运行状态在线监测与综合诊断并支持IEC 61850协议,减少智能电子装置数量和总体成本,提高设备的综合性能。
戴冬云 +4 more
doaj
Research on Electronic Differential Control System of Wheel Drive Electric Vehicle [PDF]
, 2017 摘要 随着全球能源危机加深和日趋严峻的环境污染，传统汽车面临重重障碍，汽 车的发展不得不寻求新的方向。轮毂驱动电动汽车凭借其电能来源广泛、结构简 单、传动效率高及各驱动轮能独立控制等优点而备受关注。 然而，由于轮毂驱动电动汽车去掉了传统内燃机汽车具备的机械差速器，在 具备结构简单、更多控制自由度等优点的同时，随之也产生了汽车转向行驶时驱 动轮之间协调控制的问题―电子差速问题。因此，为保证整车操纵稳定性和安全 性，避免车辆在转向行驶时因车轮滑转或滑移导致整车失控，必须采用电子差速 ...
黄志兵
core
, 2019 移动学习得益于通讯技术发展,受到广泛应用。本研究从移动学习模式的特点出发,解释了其对口译学习的重要性。同时创新性地引入活动理论模型,阐释了其在移动学习中的发展,并考虑移动学习模型的各个动态维度及其联系,对英语口译移动学习的现状进行了剖析,指出了潜在问题,以期为口译移动学习系统的设计提供启示。中央高校基本科研业务费专项资金资助(项目编号 ...
芮菲
core +1 more source
Rare Metals, EarlyView.ABSTRACT Cost‐effective and efficient non‐noble‐metal catalysts for selective lignin hydrogenolysis remain elusive, representing a significant challenge in biorefinery. Here, we prepared a nitrogen‐doped carbon supported CoNi bimetallic catalyst, which was successfully derived from zeolitic imidazolate framework (ZIF) via high‐temperature pyrolysis ...
Xingwei Luo +3 more
wiley +1 more source
Gaoya dianqi, 2018 随着直流微电网系统的广泛应用,其控制技术得到不断关注。直流微电网系统由光伏阵列、电动汽车充换站、大电网及其接口变换器构成。针对其结构特点,采用一种能量协调控制策略以维持直流母线的电压稳定。该控制策略根据直流微电网中母线电压信息（DBS）进行运行模式划分,不同运行模式下,直流微电网各单元的控制策略可进行无缝切换,实现系统协调自治。采用下垂控制实现对多个光伏阵列或者电动汽车蓄电池模块的功率均分。仿真结果表明,直流母线电压保持稳定的同时,直流微电网系统能够在并离网不同模式间进行平滑切换 ...
张国荣, 王啸飞, 王盛
doaj
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
Rare Metals, EarlyView.ABSTRACT As a promising alternative to sluggish Li2CO3‐based Li‐CO2 electrochemistry, Li2C2O4 offers a favorable 2e− discharge pathway, yet its selective formation and reversible decomposition remain debated. Herein, we propose a nonmetal‐metal synergistic catalyst—B‐Ti coregulated layered transition metal boride Ti18B18O9/graphene (B‐Ti/TiBOG)—to ...
Qiong Peng +8 more
wiley +1 more source