数据选择器在组合逻辑电路中的应用

简述了用数据选择器转换为其它功能组合逻辑电路的基本方法。     

煤矿低压防爆开关中功率因数补偿器的应用

阐述了煤矿现有电气设备功率因数提高的方式及不足,提出了补偿式防爆开关就地补偿功率因数的方法及工作原理,同时论述了补偿式防爆开关的理论计算公式,通过原理图来说明煤矿井下采用补偿式防爆开关就地补偿的优点.     

可编程序控制器(PLC)的接口电路

介绍了可编程序控制器常用输入／输出电路的基本构成以及电路的基本工作原理。     

一个组合问题的进一步研究

通过一个数学问题的解决,由此提出了进一步研究的问题,利用奇数与偶数的有关性质,得到了解决这一类问题的有关定理,并且通过例子说明了定理的具体应用.     

TOPSwitch芯片单端反激式开关电源的工作原理以及设计方法

TOPSwitch器件是一种新型单片开关电源芯片，它除了一般的PWM控制功能外，还集成了自动重启功能，过流、过热保护功能，大功率MOSFET等。本文介绍了TOPSwitch系列芯片的工作原理以及设计方法。使用它制作高频开关电源，具有成本低，电路简单，效率高等优点。     

图的矩阵在开关网络上的应用

介绍了关联矩阵、环矩阵来表示图的问题及其性质等,并且通过构造出图的关联矩阵探讨了在开关网络上的应用问题．     

The Alternative Platform: Kenya’s Television Stations Navigation During the Switch Off of Raila Odinga’s “Swearing-In”

ABSTRACT

The role of communication technologies in Kenyan newsrooms particularly from print media perspective has been investigated. However, how these technologies aid television journalism practice in Kenyan context is understudied. Using the government ban of selected television stations in Kenya during and after the symbolic “swearing-in” of opposition presidential candidate in the 2017 general election, this study investigated the influence of communication technologies by the affected television stations to circumvent government crackdown. Interview was used as the primary method for data collection. The findings of the study revealed that throughout the switch off period the newsrooms remained operational but forced to develop alternative strategies fundamentally buoyed by new media technologies to disseminate contents. Though the strategies produced unintended and unexpected effects as the findings indicated. The main challenge with technology, was news verification, since the stations were using guerrilla tactics to source news which was not easily forthcoming. In addition, there was economic implication, some advertisers demanded for a refund and potential advertisers refused to patronise the stations which according to one of the editors was hinged on fear of being targeted by government.     

本科教学运行管理中调停课现象的分析与对策

本文探讨如何加强调、停课的管理,通过对调、停课现象现状的分析,在教学管理中更加重视这一问题,提出相应对策,努力将调、停课现象对我校教学质量的影响降至最低限度。     

Errata

Abstract

In the present study, we evaluated the effects of a brief bout of exercise on executive function, short-term memory, and long-term memory tests. Eighteen young adults (mean age 22.2 years, s = 1.6) performed a set-switching test, a Brown-Peterson test, and a free-recall memory test before and after 40 min of moderate aerobic exercise on a cycle ergometer, and two control conditions. Exercise did not facilitate set switching or short-term memory, which suggests that exercise-induced arousal does not influence executive function processes involved in the reconfiguration of information in working memory. Exercise did alter specific aspects of delayed long-term memory. Free recall of items in the primacy and recency portions of the word list declined following the rest and non-exercise conditions, but was maintained after exercise, which suggests that exercise-induced arousal may facilitate the consolidation of information into long-term memory.     

推动江西基础教育持续健康发展的战略思考

基础教育是提高公民基本素质的教育,在整个教育体系中发挥着全局性、基础性和先导性作用。本文阐述了江西基础教育的优良传统,分析了当前江西基础教育改革发展面临的新形势新要求,强调江西基础教育必须围绕育人为本这一根本要求,明确三大任务,处理四对关系,突出五项重点。