Results 21 to 30 of about 19,224 (119)
ABSTRACT Most research into the relationships of linguistic complexity and accuracy to functional adequacy has focused on either spoken or written mode. The current study extended previous studies by investigating these associations across both modalities and how the nature of these relationships was influenced by learners’ L2 proficiency and task type.
Xiaojun Lu, Yui Suzukida
wiley +1 more source
笔者提出了一种新型无功补偿装置组合,即基于固定电容器(FC)+磁阀式可控电抗器(MCR)无功补偿装置,然后对其结构的工作原理和补偿原理进行了详细的说明,并且详细地说明了新型无功补偿装置的信号采集模块、晶闸管驱动模块、光纤传输模块,键盘和液晶显示模块以及相应的软件编写流程。为了验证新型无功补偿装置的补偿效果,文中利用MATLAB的软件搭建10 kV电网系统,通过利用新型无功补偿装置将系统的功率因数补偿到设定的功率因数,文中给出了相应功率因数补偿跟踪仿真波形 ...
张健华, 张春梅, 黄兆
doaj
ABSTRACT This paper examines the features of metadiscourse across different teacher moves in university linguistics classroom discourse and the teaching strategies reflected in its use. The results reveal that teachers employ diverse metadiscourse during classroom interactions to support student reasoning.
Jingjie Li, Wenjie Hu
wiley +1 more source
相同基波输出无功功率在不同谐波滤波支路对重燃过电压及MOA的影响
以一个110kV系统为例,应用EMTP对切除并联滤波器支路时,相同基波输出无功功率在不同谐波滤波支路对重燃过电压的影响进行了详细的计算和分析,并计算分析MOA的限压效果以及系统对MOA热容量的要求。结果表明,输出相同的基波无功功率时,切除低次谐波滤波器支路产生的重燃过电压较高,MOA能把过电压限制在允许范围内。但随着基波输出的无功功率增加,滤波支路次数的升高,MOA的限压效果变差;当滤波支路输出相同的基波无功功率时,通过MOA的能量随着滤波支路次数的升高而增加。
陈铮, 牛晓民, 施围
doaj
High Performance Catalyst Design by Artificial Intelligence for Acetylene Hydrochlorination
ABSTRACT The rapid development of artificial intelligence (AI) has brought transformative contributions to society, revolutionizing various fields through its advanced computational capabilities and data‐driven approaches. In the field of materials science, AI has become a powerful tool that significantly accelerates the discovery of new materials by ...
Yuan Zhou +12 more
wiley +1 more source
ABSTRACT Moist‐electric generators (MEGs) harness energy from ubiquitous ambient humidity, which has emerged as a promising way to collect energy irrespective of location and time. This study presents a high‐performance MEG employing a bilayer Janus nanofiber membrane: a hydrophilic layer (lithium chloride/citric acid/polyvinyl alcohol) for enhanced ...
Peng Chen +7 more
wiley +1 more source
采用测量A相电流和B、C相电压计算系统无功功率的方法,根据无功功率确定补偿量而不是根据功率因数cosΦ,克服了根据功率因数补偿的一些缺点。利用乘法器来实现控制电路设计。控制电路采用了七级补偿方式,经编码器输出8421编码,分别控制三组电容器,可组合投切7档不同的电容量,增加补偿精度,减少了电容器的投资。
江秀臣, 李锋, 郭效金
doaj
ABSTRACT Mechanoluminescent materials have gained significant attention for their unique capability to convert mechanical stimuli into light without external optical or electrical excitation, holding immense promise for applications in safety monitoring, biomedicine, optical anti‐counterfeiting, and intelligent sensing.
Fanlei Qin +8 more
wiley +1 more source
控制式差动无级调速装置从功能上可以分为精密调速型、扩大调速范围型和过零调速型三种。本文提出了各种不同的调速功能所应满足的传动参数条件,对装置内的功率流进行了深入的探讨,并且采用方法对各种功能的控制式无级调速装置的效率进行了分析,揭示了传动参数、调速功能、功率流、效率等诸方面的联系。在此基础上,本文分析了在考虑摩擦和功率损失的情况下,控制式差动无级调速装置内部实际功率流的大小:提出了研究这种装置的输出机械特性的途径:井且探讨了装置内无级变速器的滑差率对装置传动特性的影响 ...
张淳, 周令华
doaj

